JP6917645B2 - Exhaust gas treatment equipment and exhaust gas treatment method - Google Patents

Description

The present invention relates to an exhaust gas treatment apparatus and an exhaust gas treatment method. In particular, it relates to the treatment of fine particulate matter contained in exhaust gas.

Regulations on fine particulate matter contained in the air environment are made on a global scale, and Japan regulates the release of fine particulate matter into the atmosphere by the Air Pollution Control Act and other related laws and regulations.

The fine particulate matter refers to particles having a particle size of 2.5 μm or less among small particles suspended in the atmosphere. The components include carbon components, nitrates, sulfates, ammonium salts, as well as inorganic elements such as silicon, sodium and aluminum. It contains various particle sizes, and its composition varies depending on the region, season, and weather conditions.

Fine particulate matter is roughly classified into those directly discharged by combustion of substances (primary particles) and those produced by chemical reactions in the environmental atmosphere (secondary particles). Sources of primary particles include facilities that generate soot and smoke such as boilers and incinerators, facilities that generate dust (fine dust) such as coke ovens and mineral deposits, automobiles, ships, aircraft, soil, oceans, etc. There are also effects of natural origin such as volcanoes and cross-border pollution. Secondary generated particles include sulfur oxides (SOx) and nitrogen oxides (NOx) emitted by fuel combustion in thermal power plants, factories / business establishments, automobiles, ships, aircraft, households, etc., as well as fuel combustion facilities. Gaseous substances such as volatile organic compounds (VOCs) emitted from oil handling facilities, vaporization from petroleum handling facilities, etc. when using solvents and paints are generated by reacting with light and ozone in the atmosphere. In particular, emissions from paints, detergents, adhesives, and inks account for about 75% of the total emissions of volatile organic compounds, and even by industry, emissions from industries that handle a large amount of paints, etc. Is the majority.

For example, a general painting factory has several painting booths and drying lines in the building, a place where paint is mixed and supplied, and a material to be painted and dust removed, a polishing device, etc., and the exhaust is multiple exhaust ports. Large mist and dust are removed by the pre-filter provided in the above, and after being adsorbed by an external processing device filled with activated carbon or zeolite through a dedicated exhaust duct, it is released into the atmosphere.

The treatment method for fine particulate matter is roughly classified into a combustion method, an adsorption method, and other methods. In particular, the adsorption method is a method of physically and chemically adsorbing and recovering fine particulate matter, and is a method of repeatedly adsorbing and desorbing volatile organic compounds to regenerate the adsorbent.

Prior Document 1 is a method for treating fine particulate matter (particularly volatile organic compounds) using an adsorption method. Prior Document 1 includes a bag filter device, a means for depositing a VOC adsorbent layer on the filter cloth surface, and a means for supplying water to the adsorbent layer to agglomerate and peel off and remove it from the filter cloth surface. The technology characterized by this is disclosed.

However, if the adsorbent is not sufficiently peeled off, or if the adsorbent that has been peeled off adheres to the bottom of the bag filter device and remains uncollected in the recovery tank, the recovery efficiency of the adsorbent will increase. As a result, the adsorbent that could not be recovered is not recycled, which leads to a decrease in the amount of volatile organic compounds removed. It is also possible to consider a means for manually recovering the used adsorbent at the bottom of the bug filter device, but usually, the processing device for fine particulate matter installed in factories or the like is in operation at any time. It is desirable to keep it, and it is inefficient in terms of operation to suspend the operation of the processing device each time the collection is performed manually. Further, when recovering the adsorbent on which the fine particulate matter is adsorbed, there is a risk that the recovery worker inhales the fine particulate matter at a high concentration.

Japanese Unexamined Patent Publication No. 2011-200837 Japanese Patent No. 6140326 JP-A-2017-87150 Japanese Patent No. 5717491 Japanese Patent No. 5422320 Japanese Patent No. 5414719

Therefore, an object to be solved by the present invention is to provide an exhaust gas treatment apparatus and an exhaust gas treatment method having excellent adsorbent recovery efficiency.

The aspect that solved this problem is as follows.

(First aspect)
It is an exhaust gas treatment device equipped with an adsorbent that adsorbs fine particulate matter of the exhaust gas generated in the building.
The exhaust gas treatment device includes a filtration container for separating the fine particulate matter from the exhaust gas.
The filtration container has a supply part and a discharge part of the exhaust gas, a filtration filter to which the adsorbent can be attached and detached, and an inlet / outlet part of the adsorbent.
The exhaust gas is supplied to the filtration container from the supply unit, passes through the filtration filter, and is discharged from the discharge unit.
Adsorption means that allows the adsorbent to flow in from the inlet / outlet portion and adheres to the filtration filter, peeling means that injects compressed air into the filtration filter to peel off the adsorbent, and the outside of the filtration container from the inlet / outlet portion. Has a recovery means for sucking and recovering the peeled adsorbent.
An exhaust gas treatment device characterized by this.

The exhaust gas is supplied from the supply unit and passes through the filtration filter. At this time, the fine particulate matter contained in the exhaust gas is adsorbed by the adsorbent attached to the filtration filter. The exhaust gas that has passed through the filtration filter becomes a gas after the fine particulate matter is adsorbed by the adsorbent. Then, the adsorbent adhering to the filtration filter is peeled off by receiving the compressed air jetted by the peeling means. The peeled adsorbent floats in the filter container or peels off on the wall of the filter container. Further, even if the adsorbent is not peeled off by the peeling means, it may be peeled off by the suction force of the collecting means. The adsorbent is efficiently recovered by the peeling means and the recovery means.

(Second aspect)
The peeling means is performed without spraying the liquid on the adsorbent.
The exhaust gas treatment device according to the first aspect.

Some wet exhaust gas treatment devices spray a liquid on the adsorbent to promote the agglomeration of the adsorbent. However, when the adsorbents are agglomerated with each other, the specific surface area of the agglomerated adsorbent group becomes smaller than the specific surface area of each adsorbent. In addition, the adsorbent to which the liquid adheres is difficult to peel off from the filtration filter. Therefore, the peeling effect of the adsorbent by the peeling means is weakened, or even by suction by the collecting means, there are some adsorbent groups that cannot be completely sucked because the specific surface area of the adsorbent group is relatively small, and the recovering effect of the adsorbent is weak. Relax.

On the other hand, if the liquid is not sprayed, it is possible to prevent the adsorbent from agglomerating or becoming difficult to peel off from the filtration filter, so that the adsorbent can be efficiently recovered.

(Third aspect)
The tensile strength of the filtration filter is 1000 to 1300 N / 5 cm in length and 700 to 800 N / 5 cm in width.
The peeling means injects compressed air at 0.5 to 0.7 Mpa for 0.1 to 0.2 seconds.
The exhaust gas treatment device according to the first or second aspect.

The filtration filter has a relatively large tensile strength and can withstand a strong external force, that is, injection of compressed air, as compared with a general bag filter used for a filter cloth.

(Fourth aspect)
The bottom portion of the filtration container is located on the supply portion side, and the bottom portion is provided with the entrance / exit portion and a bypass portion for supplying the exhaust gas to the filtration container.
The exhaust gas treatment device according to any one of the first to third.

The adsorbent that has fallen to the bottom of the filtration container is guided to the inlet / outlet part by the supply pressure of the gas supplied from the bypass part and the suction force of the recovery means, and is sucked to the outside of the filtration container and collected. Emission efficiency is higher.

(Fifth aspect)
Moreover,
It has a regenerating device that regenerates the adsorbent collected by the collecting means by heating it at 220 to 350 ° C.
The adsorbing means causes the adsorbent regenerated by the regenerating device to flow in from the entrance / exit portion and adhere to the filtration filter.
The exhaust gas treatment device according to any one of the first to fourth aspects.

When the adsorbent adsorbing the fine particulate matter is heated at 220 to 350 ° C., the fine particulate matter is desorbed and / or oxidatively decomposed to be removed and regenerated. Further, by supplying the exhaust gas from the bypass portion, the adsorbent supplied to the filtration container by the adhesion means is less likely to stay at the bottom portion, and the adhesion to the filtration filter can be promoted.

(Sixth aspect)
The recovery means has a recovery container for recovering the adsorbent.
The recovery container includes a measuring instrument for measuring the mass of the recovered adsorbent and a first damper for cutting out the adsorbent.
The cut-out adsorbent is introduced into the regenerator.
The exhaust gas treatment device according to the fifth aspect.

The amount recovered can be grasped by measuring the mass of the adsorbent recovered in the recovery container. If the amount of the adsorbent attached to the filtration filter is known in advance, the recovery rate can be easily known. When the provisional yield is insufficient, it is advisable to repeat the peeling means and the recovery means until the predetermined recovery amount is reached. In addition, the amount of the adsorbent required for regeneration can be cut out and sent to the regeneration device.

(7th aspect)
It has a storage container for storing the adsorbent heated and regenerated by the regenerating device.
The storage container includes a measuring instrument for measuring the mass of the stored adsorbent and a second damper for cutting out the adsorbent.
The cut-out adsorbent is allowed to flow into the filtration vessel by the adhesion means.
The exhaust gas treatment device according to the fifth or sixth aspect.

The amount of the regenerated adsorbent stored in the storage container can be appropriately adjusted. In addition, since the regenerated adsorbent is reused for adhesion to the filtration filter, it is possible to adsorb and remove fine particulate matter by circulating the adsorbent without separately replenishing the adsorbent from outside the system. Become.

(8th aspect)
The fine particulate matter is removed by using the exhaust gas treatment apparatus according to any one of claims 1 to 7.
A method of treating exhaust gas, which is characterized by the fact that.

The same effect as that of the first to seventh aspects is achieved.

(9th aspect)
Before supplying the exhaust gas to the filtration vessel,
The adsorbent is allowed to flow into the filtration vessel together with the carrier gas and adhered to the filtration filter to form an adsorbent layer.
The method for treating exhaust gas according to the eighth aspect.

By performing the adhesion step before supplying the exhaust gas, when the exhaust gas is supplied to the filtration container, the fine particulate matter is adsorbed on the adsorbent layer, and the residue passes through the filtration filter.

(10th aspect)
At the stage when the adsorbent layer is broken,
A step of injecting compressed air to peel off the adsorbent adhering to the filtration filter is performed.
The method for treating exhaust gas according to the ninth aspect.

If the adsorbent layer is broken, the adsorption performance of fine particulate matter deteriorates. By performing a peeling step when the adsorbent layer is broken, the adsorbent on which the fine particulate matter is adsorbed is peeled off and dropped on the bottom of the filtration vessel.

(11th aspect)
A recovery step in which the adsorbent constituting the peeled adsorbent layer is sucked from the entrance / exit portion and discharged to be recovered.
After the recovery step, the recovered adsorbent is heated to 220 to 350 ° C. and introduced into a regenerating device to regenerate the adsorbent to obtain the regenerated adsorbent.
After the regeneration step, the regenerated adsorbent is allowed to flow into the filtration container and adhered to the filtration filter to form an adsorbent layer.
The method for treating exhaust gas according to the tenth aspect.

By heating the peeled adsorbent, the contained fine particulate matter is desorbed and oxidatively decomposed, and the adsorbent can be regenerated. Further, by supplying the regenerated adsorbent to the filtration container, the adsorbent layer is formed on the filtration filter again. The adsorbent can be reused by performing the peeling step, the regeneration step, and the attaching step.

According to the present invention, there is an exhaust gas treatment apparatus and a treatment method thereof having excellent recovery efficiency of the adsorbent.

It is a structural explanatory drawing of the exhaust gas treatment apparatus. It is a cross-sectional view of the filtration filter of the XX part of FIG. It is an enlarged view of the Y part of FIG. It is an enlarged view of the Z part of FIG. It is a figure of a breakthrough curve. It is an arrow view of the filtration filter of the ZZ portion of FIG. (7A) It is an enlarged view of the P part of FIG. (7B) It is an enlarged view of the R part of FIG. 7A. It is a cross-sectional view which shows the lid body. It is a structural explanatory drawing of another embodiment of the fine particulate matter processing apparatus. It is a structural explanatory drawing of another embodiment of the fine particulate matter processing apparatus.

A mode for carrying out the invention will be described below. The present invention relates to a technique for removing fine particulate matter (including water) in a gas by adsorbing the fine particulate matter on an adsorbent in an environment where fine particulate matter is generated. .. The following description and drawings merely show one embodiment of the present invention, and the contents of the present invention should not be construed as being limited to this embodiment. In general, fine particulate matter does not contain water, but at work sites where fine particulate matter is used, moisture is contained in the air, so water is usually contained in the gas containing fine particulate matter. Will be described below as a matter of course.

The exhaust gas treatment device 100 can be installed in a building, for example, a factory, an experimental facility, a treatment plant, a storage facility, or the like. The exhaust gas treatment device 100 collects and recovers fine particulate matter contained in the exhaust gas generated in this building with an adsorbent. The exhaust gas treatment device 100 includes a filtration container 10 that separates fine particulate matter from the exhaust gas. The filtration container 10 has a gas supply unit 11 and a gas discharge unit 13, a filtration filter 12 through which the supplied gas is permeated and an adsorbent can adhere to and peel off, an adsorbent inlet / outlet unit 15, and an adsorbent input / output unit. Adhesive means that flow in from the portion 15 and adhere to the filtration filter 12, peeling means that injects compressed air into the filtration filter to peel off the adsorbent adhering to the filtration filter 12, and the outside of the filtration container 10 from the inlet / outlet portion. It has a recovery means for sucking and recovering the peeled adsorbent. Examples of the peeling means include injecting compressed air from the injection nozzle 14 onto the filtration filter surface.

Further, the processing device 100 heats the collection container 30 in which the adsorbent discharged from the filtration container 10 is collected, the first damper V7 from which the recovered adsorbent is cut out, and the adsorbent discharged from the filtration container 10. A regenerating device 40 for regenerating the product, a storage container 50 for storing the regenerated adsorbent, and a second damper V9 from which the adsorbent in the storage container is cut out can be provided.

(Filtration container)
The volume of the filtration vessel 10 is not particularly limited, for example, when processing the air volume 50 m ³ / min of the exhaust gas in the filtering vessel 10 may be a 0.75~1.25m ^3. The filtration container 10 includes a filtration filter 12 to which an adsorbent can be attached and detached, and the filtration filter 12 can be, for example, in a form of being held by a holding body 18 provided in the filtration container 10. One or a plurality of filtration filters 12 may be provided. The holding body 18 is made of a gas-impermeable material (for example, metal, stainless steel, wood, plastic, etc.), is supplied from the gas supply unit 11 into the filtration container 10, and is discharged from the gas discharge unit 13. The gas flow space is separated into a space on the supply part side and a space on the discharge part side. As an example, the holding body 18 is provided with an opening, and the filtration filter 12 is stretched in the opening. The filtration container 10 is separated into a supply unit side and a discharge unit side by the holding body 18 and the filtration filter 12, and the gas supplied from the gas supply unit 11 to the supply unit side in the filtration container permeates through the filtration filter 12. , Flows to the discharge unit side, and is discharged from the gas discharge unit 13 to the outside of the filtration container 10. Further, the filtration container 10 has a bottom, and the wall on the discharge portion side may have a shape that is narrowed toward the bottom, or a shape that is not narrowed (for example, the wall on the discharge portion side is omitted). It may have a tubular shape having substantially the same diameter toward the bottom).

The gas supply unit 11 is provided with an openable and closable damper V1 for adjusting the supply amount of the supply gas A. The adsorbent inlet / outlet portion 15 is provided with an openable / closable damper V3 for adjusting the supply amount or the discharge amount of the adsorbent. In addition to the above, the filtration vessel 10 can be provided with a bypass portion 17. The bypass section 17 and the upstream portion of the damper V1 in the gas supply section 11 are communicated with each other by a bypass pipe, and the bypass pipe is provided with an openable and closable damper V2 for adjusting the supply amount of the flowing supply gas A. There is. When the bypass portion 17 is provided, the bottom portion of the filtration container 10 is located on the exhaust gas supply portion 11 side, and the bypass portion 17 may be provided at this bottom portion. In this case, it is advisable to provide an entrance / exit portion 15 on the same bottom portion. Here, the bottom portion may be, for example, a range of 10 La from the lower end of the filtration vessel 10 to a height of 1/4 of the total height of the filtration vessel 10 when the filtration vessel 10 is erected with the bottom portion facing down. can.

The bypass portion 17 can be used in combination with the attachment means and the recovery means. By supplying the exhaust gas A from the bypass portion 17 to the filtration vessel 10, the adsorbent at the bottom of the filtration vessel 10 receives the wind pressure from the exhaust gas A, and it becomes difficult to stagnate. By supplying the exhaust gas A from the bypass portion 17 together with the adsorbent adsorbing step described later, the adsorbent flowing in from the inlet / outlet portion 15 is less likely to stay at the bottom of the filtration container 10, and the adsorbent is more adhered to the filtration filter 12. It becomes easier to do. By supplying the exhaust gas A from the bypass section 17 together with the recovery step, a gas flow is formed from the bypass section 17 to the entry / exit section 15, and the peeled adsorbent flows out along this flow, so that the adsorbent is recovered. It will be highly efficient.

(Filtration filter)
The filtration filter 12 can be single-layer or multi-layer. In the illustrated form, a single-layer filtration filter is used. Further, the material of the filtration filter is not particularly limited as long as it allows gas to pass through and does not allow the adsorbent to pass through. Polyester, polyphenylene sulfide (PPS) resin, stainless steel, nylon and the like can be exemplified as the material of the filtration filter. As a specific material of the filtration filter 12, for example, G2260-1S BK0 of Toray Industries, Inc.'s polyester long fiber non-woven fabric "Axter" (registered trademark) can be used.

The film thickness of the filtration filter 12 is preferably 0.4 to 1.2 mm, more preferably 0.6 mm. The fiber diameter of the filter medium (meaning the diameter equivalent to the projected area circle, the Heywood diameter; the same applies hereinafter) is preferably 7 to 20 μm, and more preferably 10 μm. If a fiber having a fiber diameter smaller than 7 μm is used, the resistance at the time of gas permeation increases and the apparent surface area becomes narrow. Further, if a fiber having a fiber diameter larger than 20 μm is used, the adsorbent permeates the filtration filter, making it difficult to recover the adsorbent.
Therefore, it is preferable to form the filtration filter 12 having a certain degree of coarseness by using a filter medium having a fiber diameter of 7 to 20 μm. When the gas is permeated by the filtration filter 12 having a certain degree of coarseness, a part of the adsorbent bites into the eyes of the filtration filter 12 to form an adsorption layer, so that the fine particulate matter is adsorbed. It is adsorbed on the agent layer and does not easily pass through the filtration filter.

In the present embodiment, the filtration filter 12 has a surface facing the supply unit side (side surface of the supply unit) and a back surface thereof, that is, a surface facing the discharge unit side (side surface of the discharge unit). The gas supply unit 11 may be provided at any position in the space on the supply unit side of the filtration container 10, but is supplied when the gas supply unit 11 is provided at a portion as far away from the filtration filter 12 as possible or near the portion as far away as possible. This is preferable because the gas is widely diffused in the space on the supply side. The gas discharge portion 13 may be provided at any position in the space on the discharge portion side of the filtration container 10. In particular, the gas supply unit 11 and the gas discharge unit 13 are provided on the wall of the filtration container 10, and the filtration filter 12 is arranged between the gas supply unit 11 and the gas discharge unit 13, and is the most distant from each other. Is preferable.

As the filtration filter 12, a known filter can be appropriately used, but in order to withstand the injection of compressed air and peel off the adsorbent by the impact when the compressed air hits, the frequency of replacement of the filtration filter is reduced, and running is performed. In order to reduce the cost, it is preferable to use one having a predetermined strength or more. For example, in the measurement method of JIS L-1906, the tensile strength (N / 5 cm) is vertical: 1000 to 1300, preferably vertical: 1200, horizontal: 700 to 800, more preferably horizontal: 700, burst strength (kgf / cm). ² ) is preferably vertical: 170 to 260, preferably vertical: 170.

The shape of the filtration filter 12 is not particularly limited, but it can be made flat, for example. Further, it may have a bag shape, specifically, a spherical shape having an opening, or a bottomed tubular shape, particularly a tubular shape in which a flat filter medium is bent into a bellows shape to form a plurality of folds. It may be bottomed (so-called pleated). The bag shape is preferable because the surface area of the filtration filter is larger than that of the flat shape, and the formation area of the adsorbent layer is increased accordingly. The tubular shape includes, but is not limited to, a cylindrical shape, a polygonal columnar shape, and the like.

When the filtration filter 12 has a bag shape, the filtration filter 12 extending from the gas supply portion side to the gas discharge portion side and having the gas discharge portion side end of the filtration filter 12 open is a preferable form. In this case, the filtration filter 12 can have a length in the longitudinal direction of, for example, 500 mm to 1200 mm.

(Cylindrical body)
When the filtration filter 12 has a bag shape, the filtration filter 12 shrinks toward the inside of the bag due to the influence of the gas flow, and the adsorption efficiency of fine particulate matter decreases. In order to prevent the filtration filter 12 from shrinking, the following tubular body 12s may be provided along the inner surface (side surface of the discharge portion) of the filtration filter 12. For example, if the shape of the filtration filter 12 is a prism with one end closed and the other end facing open, a prismatic tubular body having substantially the same size as this prism (both bottom surfaces of the prism are open). It is advisable to provide). Further, it is preferable that a gas passage hole is formed on the side surface of the tubular body 12s, and a gas passage through which the permeated gas B passes is formed on the inner surface. The outer diameter of the tubular body can be appropriately designed depending on the volume of the filtration vessel 10, but is preferably 0.4 to 0.46 m, for example.

In particular, when the pleated filtration filter 12 as shown in FIG. 2 is used, a gas permeation hole is formed in the wall surface of the filtration container 10, and a gas passage 12r through which the permeated gas B passes is formed in the filtration container 10. The tubular body 12s is provided. The shape and orientation of the tubular body 12s are not particularly limited, but in the illustrated example, the tubular body 12s has a cylindrical shape, and the central axis thereof is arranged in the filtration vessel 10 in a posture along the filtration vessel 10 (US-DS direction). There is. In addition, the shape of the tubular body 12s may be changed to an arbitrary known shape such as a square tubular body, or the posture of the tubular body 12s may be changed so that the central axis of the tubular body 12s is inclined obliquely. It may be installed inside. The illustrated tubular body 12s is formed by molding a flat plate having a through hole such as a punching metal into a cylindrical shape.

A filtration filter 12 is formed on the outside of the wall surface of the tubular body 12s. Since the filtration filter 12 has a large surface area (gas permeation area), a flat filter medium is bent in a zigzag manner and wound around the outer peripheral surface of the tubular body 12s to form a tubular shape (in the embodiment of FIG. 2, the shape is cylindrical). However, the present invention is not limited to this, and a pleated filter formed in a prismatic shape, an elliptical shape, or the like can be preferably used. By bending in a zigzag manner as described above, a plurality of folds 2 are formed around the tubular body 12s (in the illustrated embodiment, all around the tubular body 12s). When bending a flat filter medium, it may be bent so as to make a crease, or it may be bent so as to draw a curve (gentle curve, sharp curve, etc.) so as not to make a crease. Further, as shown in FIG. 6, in order to close the end portion on the supply portion side of the pleated filter to form a bag shape, the pleated filter is formed by passing through each of the base end portions 2b on the gas supply portion side of the fold 2 which will be described later. It is assumed that the abbreviated circle is covered with a lid body of 12 mD. The lid body 12 mD may be formed of, for example, the same material as the material (filter material) used for the pleated filter.

(spacer)
It is preferable to provide a spacer 3 in which a flat plate material (honeycomb mesh, wire mesh, etc.) having a plurality of holes is bent into a bellows shape (this bellows shape also includes a wavy one) inside the folds 2. .. The spacer 3 extends from the base end side (cylindrical body 12s side) of the folds 2 toward the tip end side (filtration container 11 side) while being bent in a zigzag manner. In the illustrated embodiment, one spacer 3 is provided on each fold 2, and one end of the spacer 3 is separated from the outer surface of the tubular body 12s by about 0.1 mm to 0.5 mm (in contact with the tubular body 12s). The other end is located at the tip end of the fold 2. The bent portions 3C and 3C formed at both ends of the spacer 3 in the thickness direction are in contact with the back surface 12b of the filtration filter 12. The spacer 3 in the illustrated form is in point-like contact with the filtration filter 12 in a plan view, and the contact portions are bent portions 3C and 3C. The spacer 3 has a function of holding the internal space 2S of the folds 2, and the gas A supplied from the gas supply unit 11 receives the wind pressure from the air flow from the supply unit side surface 12f of the filtration filter 12 to the discharge unit side surface 12b, and the wind pressure. It prevents the internal space 2S from being completely crushed against the pressure that foreign matter contained in the gas A is laminated on the side surface 12f of the supply portion of the filtration filter 12 and tries to crush the folds 2. The disappearance of the internal space 2S of the fold 2 is called "blocking", and by preventing this blockage, the permeated gas B can easily move the internal space 2S from the tip end side to the base end side. FIG. 4A shows a state before the gas A is supplied, and FIG. 4B shows a state during the supply of the gas A. As shown in these drawings, when the fold 2 receives wind pressure from the supply portion side by the gas A, the thickness of the spacer 3 becomes thinner (the length in the thickness direction becomes shorter) than before receiving the wind pressure. The shape of the spacer 3 in a plan view becomes almost flat, and the width 2w of the fold 2 becomes narrow. Even in such a case, the spacer 3 is not completely flat, and the internal space 2S is hardly completely crushed and blocked.

In the illustrated form, the pleated filter and the spacer 3 are in contact with each other at the refracting portion 3C in a plan view, and the contact portion Tc is formed in the thickness direction along the extending direction of the spacer 3 with a predetermined interval. It exists alternately in dots. That is, in a plan view, the pleated filter and the spacer 3 are not in contact with each other in a plane shape. As described above, by forming the spacer 3 in a bellows shape, it is possible to apply an elastic force that expands and contracts in the thickness direction to the folds 2.

The material of the spacer 3 is not particularly limited, but for example, polypropylene, polyester, polytetrafluoroethylene or the like (either alone or in combination of two or more) can be used. In particular, polypropylene and polyester are preferably used because elastic force and pressure resistance are required.

For example, as the spacer 3, a plate material having a mesh structure made of plastic fibers (or other fibers may be used) is corrugated to form an elastic body. The mesh structure at this time can be, for example, a mesh of about 1.5 mm to 2 mm. The spacer 3 which is the corrugated elastic body is pressed from the supply portion side (outside) to the discharge portion side (inside) of the filtration filter 12 by the wind pressure of the gas A, but the nodule portion of the mesh has a wire diameter. It has twice the thickness (about 0.32 to 0.4 mm), and ensures the air permeability in which the permeated gas B in the internal space 2S of the fold flows in the direction of the tubular body 12s.

In the above description, it is described that the adjacent fold space 2n is opened. It is most preferable to completely open the adjacent fold space 2n, but the present invention is not necessarily limited to such a form, and a part of the adjacent fold space 2n may be closed.

(Open space)
As shown in FIG. 8, when the axial direction of the pleated filter is the vertical direction, at least one of the upper end portion and the lower end portion of the pleated filter is covered with the lid 21 from the outside so as to cover the outer fold space 2n. It can be in the form that was used. As a result, the outer fold space 2n is closed. For example, when the pleated filter is vertically placed as shown in FIG. 8B, the lid 21 is provided on at least one of the upper end portion and the lower end portion of the pleated filter, and the gas inside the pleated filter is unintentionally exposed to the outside (not shown). In the form, it prevents leakage to the supply section side). Although only the lower portion of the pleated filter is illustrated in FIG. 8B, the lid 21 may also be provided at the upper end portion of the pleated filter.

Further, as shown in FIG. 1 and the like, both sides (both the upper end side and the lower end side) or the lower end side of the pleated filter in the vertical direction can be configured to be unblocked. Specifically, as shown in FIG. 6, it is a space 27 outside the folds 2 of the pleated filter, and is a space 2n between the adjacent folds 2 and the folds 2 (“outer fold space” or “adjacent fold space”). Also referred to as "space". In this specification, the same applies to other paragraphs.) Is not blocked. That is, the outer fold space 2n is an open space (also referred to as “unblocked space”). In FIG. 6, one of the outer fold spaces 2n is shaded. In FIG. 6, in order to improve the visibility of the drawing, only one outer fold space 2n is shaded, but as shown in FIG. 6, a large number of folds 2 cover the entire circumference of the pleated filter. Is formed, and the space outside the pleated filter and between the adjacent folds 2 and 2 is all the outer fold space 2n. The outer fold space 2n refers to a portion surrounded by the outer surface 12f of the adjacent folds 2 and the fold 2 (a portion partitioned by the outer surface 12f), and the base end of the outer fold space 2n is the fold 2. It is in contact with the base end portion 2b, and the tip of the outer fold space 2n is partitioned by a virtual line AL connecting between the tip portions 2p and 2p of the adjacent folds 2 and 2. As shown in FIG. 8B, the pleated filter provided with the lid 21 is mixed with the supplied gas into the connection portion 29 between the upper end of the pleated filter and the lid 21 and the connection portion 29 between the lower end of the pleated filter and the lid 21. Foreign matter, dust, and peeled adsorbents tend to collect. The foreign matter, dust, and the peeled adsorbent are removed by the air flow generated by adjusting the inflow air volume of the adsorbent, but the following structure is preferable because it does not collect in the connecting portion 29.

Further, it is possible to propose a pleated filter in an open state in which the outer fold space 2n is not sealed by the lid 21 or the like on both sides in the axial direction. As a modification, the outer fold space 2n may be left open without being sealed by the lid 21 or the like only on the lower end side in the axial direction of the pleated filter. Further, the lid 21 may be provided on the lower end side or both sides in the axial direction of the pleated filter, but when the lid 21 is provided, a notch is provided in the portion of the lid 21 that overlaps with the outer fold space 2n. It is preferable to open the outer fold space 2n by such means.

When the lower end side or both ends of the pleated filter in the axial direction are opened, foreign matter, dust, an adsorbent, etc. adhering to the pleated filter will be removed from the filter container 10 when the injection nozzle 14 is used for injection, adhesion means, and recovery means. It becomes easy to diffuse in and peel off, and it becomes difficult to stay in the outer fold space 2n.

In addition, when the outer fold space 2n is opened on both sides or the lower end side in the axial direction of the pleated filter, it is important not to provide an embedded object other than the lid 21. This is because if an embedded object is provided, it will not be in an open state.

(Closed space)
As shown in FIGS. 6 and 7, it is preferable to block the space inside the folds 2 on both sides of the pleated filter in the axial direction. The space inside the fold 2 is a concept including the internal space 2S of the fold 2 as shown in FIG. In FIGS. 7A and 7B, the space sandwiched between the filtration membranes 12ma and 12mb of the folds 2 (internal space 2S of the folds 2) is closed (closed), forming a so-called closed space 16C. .. The method of forming the closed space 16C is not particularly limited, and examples thereof include a method of heating and welding the inner wall surfaces of the facing filtration membranes 12ma and 12mb with ultrasonic waves or a heater. In addition, the downstream surfaces (inner wall surfaces) may be adhered to each other with an adhesive, or a resin may be embedded between the filtration membranes 12 ma and 12 mb.

When the tubular body 12s is provided inside the pleated filter, the space 22 between the filtration filter 12m and the tubular body 12s (the shaded portion in FIG. 7A) (hereinafter, “membrane” is used in the concept of the space inside the folds 2. It may include "inter-cylinder space"). In the example of FIG. 7A, the closed space 16C is formed by embedding a resin in the space between the membranes 22. However, the space is not limited to this mode. It may be glued or the like.

In the above description, a mode in which an adhesive or an embedded material is used to form the closed space 16C has been described. The type of adhesive is not particularly limited, but it is preferable to use, for example, an epoxy resin adhesive or a rubber-based adhesive because it is excellent in pressure resistance and adhesive strength. The type of the embedded material is not particularly limited, but it is preferable to use, for example, an epoxy resin-based sealant or a silicone rubber sealant because of its high sealing property. As the embedded material, it is preferable to use a resin (for example, epoxy resin-based or phenol-based) that cures after being embedded. This is because if the resin does not cure, it may peel off.

Further, the closed space 16C may be formed by using something other than an adhesive or an embedded material. For example, a lid may be provided at a portion where the closed space 16C is desired to be formed. The lid can be made of, for example, a single plate material. Although the sealing property is improved by using a plurality of plate materials, a single plate material is preferable because the number of members is large, management is difficult, and the cost is high. As the material of the plate material, for example, stainless steel, aluminum, plastic and the like can be used.

The position where this plate material is used may be any portion as long as it is one end side end portion or the other end side end portion in the axial direction of the pleated filter. That is, it does not necessarily have to be provided at one end side edge or the other end side edge of the pleated filter, and for example, this plate material may be embedded in the internal space 2S of the fold 2 of the pleated filter.

As shown in FIG. 1, the position where the closed space 16C is provided is at least one of one end side end portion and the other end side end portion in the axial direction of the pleated filter. In the embodiment of FIG. 1, an epoxy resin is used to form the closed space 16C at one end side end portion and the other end side end portion.

As described above, by blocking the space inside the folds 2, the gas A existing in the space outside the folds 2 (on the supply part side) is mixed into the pleated filter from the axial end of the pleated filter. You can prevent that. As a result, the permeated gas B moves from the space inside the fold 2 to the permeated gas passage 12r. When the gas A before permeation is mixed into the inside from the axial end of the pleated filter, the gas A before permeation is mixed with the permeated gas B and discharged from the discharge unit 13.

The passage 12r of the permeated gas B means the space inside the tubular body 12s when the tubular body 12s is provided. When the tubular body 12s is not provided, it means the space inside the base end portion 2b of the fold 2. In FIG. 1, in plan view, the upper end of the pleated filter is covered with a lid (not shown). This lid covers the upper end portion of the pleated filter and is provided with a permeation gas B passage port (gas permeation port) in the central portion. The gas passage port is provided so as to be located above the tubular body 12s. By covering the upper end portion of the pleated filter with a lid, the supply gas A can be prevented from entering from the space on the supply side to the space on the discharge portion side in the vicinity of the upper end portion of the pleated filter. The permeated gas B is discharged from the gas discharge unit 13 to the outside of the exhaust gas treatment device by the exhaust means. As the exhaust means, known means can be appropriately used. As an example of the exhaust means, a means for discharging the permeated gas B from the gas discharge unit 13 to the outside by using an air supply device 19a (for example, an air supply fan or the like) provided upstream of the gas supply unit 11 can be mentioned.

When blocking the space inside the fold 2, it is preferable to completely block it. If there is a gap in a part of the gap, gas A containing fine particulate matter may be mixed in from the gap to the discharge portion side. That is, when the space inside the fold 2 is adhered with an adhesive, for example, it is preferable to seal between the facing filtration membranes 12ma and 12mb. Further, when the space inside the fold 2 is closed with an embedded object, a small through hole or the like should not be generated inside the embedded object, and for example, between the filtration filter 12 and the embedded object, or a cylinder. It is preferable to seal the body 12s and the embedded object so as not to create a gap. Similarly, when the space inside the fold 2 is sealed with a lid, it is preferable to seal the space between the filtration membrane 12 m and the lid or between the tubular body 12s and the lid so that no gap is formed.

It is preferable not to block the space inside the folds 2 with respect to the portions other than the axially end portions 16C and 16C of the pleated filter, that is, the axially central direction intermediate portions of the pleated filter. This is so that the permeated gas B can pass through the space and flow into the permeated gas passage 12r.

(Adsorbent)
As the adsorbent, activated carbon, zeolite, silica, alumina, titania, titanium oxide, imogolite and the like can be used. Examples of raw materials for activated carbon include coconut husk, coal (bituminous coal, anthracite coal), oil pitch, wood chips, sawdust, coffee slag, rayon, acrylonitrile, and phenol resin. The shape includes, but is not limited to, granular, crushed, powdery, fibrous, molded (honeycomb), and the like.

From the size of the adsorbent pores, those with a diameter of 2 nm or less are called micropores, those with a diameter of 2 to 50 nm are called mesopores, and those with a diameter of 2 to 50 nm are called macropores. It is the micropores that increase the specific surface area of the adsorbent and quickly adsorb fine particulate matter. For example, activated carbon has pores of various diameters, from micropores to macropores. Zeolites also have relatively uniform micropores. Any adsorbent can be used in the present invention because of the presence of micropores (micropores) in the above-exemplified adsorbent group.

The average particle size of the adsorbent may have a lower limit of 5 μm or more, preferably 10 μm or more, and an upper limit of 30 μm or less, preferably 20 μm or less. If it is less than 5 μm, the adsorbent may enter the inside of the filtration filter 12 or permeate. If it exceeds 30 μm, it is difficult for the adsorbent to flow in the air flow with a predetermined inflow air volume or a predetermined outflow air volume. The average particle size can be measured according to JIS Z 8825: 2013.

The lower limit of the bulk specific gravity of the adsorbent is ^{preferably 0.4 g / cm 3} or more, and the upper limit is preferably 1.5 g / cm ³ or less. If it is less than 0.4 g / cm ³ , the adsorbent will fly up with a slight wind and it will be difficult to handle. If it exceeds 1.5 g / cm ³ , it becomes difficult to flow along the air flow.

When a gas containing an adsorbent is supplied to the filtration filter 12 in the filtration container 10 at a predetermined inflow air volume, the adsorbent adheres to the filtration filter 12 to form an adsorbent layer. When the adsorbent inlet / outlet portion 15 is on the supply portion side, an adsorbent layer is formed on the side surface of the supply portion of the filtration filter 12, and when the adsorbent inlet / outlet portion 15 is on the discharge portion side, an adsorbent layer is formed on the side surface of the discharge portion of the filtration filter 12. .. When the filtration filter 12 has a bag shape, the exhaust gas A may flow from the outside to the inside of the bag of the bag-shaped filtration filter. At this time, when the tubular body 12s is provided inside the filtration filter, the entrance / exit portion 15 may be provided on the supply portion side. In this way, an adsorbent layer is formed on the side surface of the supply portion of the filtration filter 12, and the permeated gas B that has passed through the filtration filter from the supply portion side to the discharge portion side passes through the gas passage 12r of the tubular body 12s. It is discharged from the discharge unit 13.

The thickness of the adsorbent layer may be, for example, a lower limit of 0.5 mm or more and an upper limit of 4 mm or less. If it is less than 0.5 mm, the fine particulate matter may permeate through the filtration filter 12, and if it is more than 4 mm, the fine particulate matter is easily adsorbed near the surface of the adsorbent layer on the supply side. It is difficult to be adsorbed near the surface on the discharge part side.

(Peeling means)
The peeling means is a means for injecting compressed air onto the filtration filter 12 to peel off the adsorbent adhering to the surface of the filtration filter. The injection can be performed on the surface of the filtration filter 12 to which the adsorbent is attached or the back surface thereof. In particular, when the injection is performed on the back surface, the adsorbent receives the injection pressure in the normal direction (upward) with respect to the surface to which the adsorbent is attached, and receives the external force due to the shape change of the filtration filter 12 on the same upper surface. Therefore, it is preferable because it is urged to peel off to the outside on the same surface side. The injection can be performed using, for example, the injection nozzle 14. The injection port of the injection nozzle 14 can be provided on the surface side or the back surface side of the filtration filter 12 to which the adsorbent adheres. In particular, the injection nozzle 14 is preferably provided on the back surface of the surface of the filtration filter 12 to which the adsorbent adheres. For example, in the case where the adsorbent adheres to the side surface of the supply portion of the filtration filter 12, the injection nozzle 14 is provided on the discharge portion side of the filtration filter 12 and the compressed air is injected to the side surface of the discharge portion of the filtration filter 12. It becomes. In this embodiment, the location where the injection port of the injection nozzle 14 is installed is not particularly limited as long as it is on the discharge portion side and compressed air can be injected onto the surface of the filtration filter 12. In particular, a form in which the injection nozzle 14 is provided in the vicinity of the open end of the bag-shaped filtration filter 12 is preferable because the loss of compressed air is suppressed. As shown in FIG. 1, the neighborhood means, for example, the diameter of the filtration filter 12 (in the case of a pleated filter, the diameter of a substantially circle formed through the base end portions 2b, 2b, ... Of the folds 2). Then, it is preferable that the distance 14L between the open end of the filtration filter 12 and the injection nozzle 14 is 1.5 times or less of x. If it exceeds 1.5 times x, the compressed air injected from the injection nozzle 14 will be dispersed, and the effect of peeling the adsorbent from the filtration filter 12 may not be expected.

As a method of injecting compressed air from the injection nozzle 14, known means can be appropriately adopted. For example, an equipment in which the injection nozzle 14 and an air compressor, for example, a compressor are connected by an air supply pipe is prepared, and compressed air generated by the air compressor is injected from the injection nozzle 14 through the air supply pipe. Techniques can be mentioned.

The diameter of the injection port of the injection nozzle 14 can be adjusted as appropriate, but can be, for example, 25 to 50 mm. If it is less than 25 mm, the injection range is narrow, so that the adsorbent may not be sufficiently peeled off from the filtration filter 12. If it exceeds 50 mm, the injection range is too wide and the amount of compressed air for injection is large, which is not efficient.

Compressed air may be injected from the injection nozzle 14 at 260 kPa or more, more preferably 300 kPa or more, and 900 kPa or less, more preferably 500 kPa or less. If it is less than 260 kPa, the adsorbent constituting the adsorbent layer is not sufficiently peeled off. If it exceeds 900 kPa, the volume at the time of injection becomes large and may cause noise.

The time for injecting compressed air from the injection nozzle 14 cannot be unconditionally determined by the shape of the filtration filter 12, but for example, the lower limit may be 0.1 seconds or more, and the upper limit may be 0.2 seconds or less. If it is less than 0.1 seconds, the adsorbent may not be sufficiently peeled off. If it exceeds 0.2 seconds, even if the adsorbent is sufficiently peeled off, the injection will continue and energy will be wasted.

The peeling means may or may not spray the liquid on the adsorbent. However, it is preferable to perform peeling without spraying the liquid on the adsorbent because the adsorbent easily flows together with the gas.

(Reproduction device)
The adsorbent that has been ruptured by adsorbing the fine particulate matter may flow out from the adsorbent inlet / outlet portion 15 and be discarded, but it is regenerated to return to the state before the rupture, and the fine particulate matter is again removed. It may be used to adsorb. Therefore, a regeneration device 50 for regenerating the adsorbent can be provided. The ruptured adsorbent C3 is introduced into the regenerating device 50, heat-treated, and regenerated. Then, the regenerated adsorbent is supplied to the filtration vessel 10 again.

The heating temperature of the regenerating device 50 may be appropriately adjusted depending on the constituent components of the fine particulate matter. For example, it may be 220 ° C. or higher, and 350 ° C. or lower. If the temperature is lower than 220 ° C, it is difficult for fine particulate matter to be desorbed or oxidatively decomposed. If it exceeds 350 ° C., most of the fine particulate matter is desorbed or oxidatively decomposed, the temperature is still high, more energy is consumed than necessary, and it is uneconomical.

As the reproduction device 50, a known device can be used as appropriate, and for example, the device disclosed in Japanese Patent No. 6140326 and Japanese Patent No. 5317885 can be applied. The outline of this device is shown below. This device is a heated kiln type having an adsorbent inlet at one end of the rotary kiln and an outlet at the other end. The heating kiln can be an external heat kiln or an internal heat kiln.

An adsorbent adsorbing the fine particulate matter is charged from the charging inlet, and the adsorbent is brought into contact with the catalyst charged together with the adsorbent by the rolling rotation of the heating kiln, and heated to a predetermined temperature to form the fine particulate matter. The regenerated adsorbent that has been desorbed and / or oxidatively decomposed is configured to be discharged from the discharge port. The adsorbent is charged into the rotary kiln by a hopper, a cutting-out feeder, and a supply feeder. A means for stirring the contents (adsorbent S and catalyst) can be provided in the rotary kiln. Further, a temperature detecting means can be provided inside the kiln or on the discharge port side of the contents, and the temperature can be controlled based on the result.

The oxidative decomposition catalysts are Co, Ce oxide-based catalysts mainly composed of composite oxides obtained by calcining a mixture of cerium carbonate and cobalt carbonate, platinum-based catalysts, dichrome trioxide (Cr ₂ O ₃ ), and five. You can choose from a group of vanadium oxide (V ₂ O ₅ ), titanium dioxide (TIO ₂ ), tungsten trioxide (WO _{3) and combinations thereof.}

As the Co, Ce oxide-based catalyst, a commercially available "ball-type Co, Ce oxide-based catalyst" (provided by Sankyo Kosan) can be used. Further, in this regard, the inventions of Japanese Patent No. 5717491, Japanese Patent No. 5422320, and Japanese Patent No. 5414719 are known, and the fields of application, components, production methods, characteristic actions and effects of the inventions are known. .. In addition to using commercially available Co and Ce oxide-based catalysts, it is also possible to obtain (manufacture and use) a catalyst based on the patent group.

(Adhesion means, recovery means)
The following means can be exemplified as a recovery means for sucking and recovering the peeled adsorbent from the entrance / exit portion 15 to the outside of the filtration container 10. It is assumed that the air supply / exhaust device BL is provided outside the filtration container 10, and the inlet / outlet unit 15 and the air supply / exhaust device BL are connected via the air pipe G2. When the air supply / exhaust device BL is operated under negative pressure, the air pipe G2 becomes negative pressure, and the adsorbent in the filtration container 10 is collected together with the gas from the inlet / outlet unit 15 to the air supply / exhaust device BL with a predetermined outflow air volume. Here, the predetermined outflow air volume is defined as the adsorbent in the filtration container 10 (a part of the adsorbent adhering to the filtration filter 12, the adsorbent peeled from the filtration filter 12, and adhering to the filtration filter 12 from the beginning. The amount of air air discharged together with the gas is not particularly limited as long as the amount of air air discharged together with the gas is included.) This outflow air volume is, for example, 5 m ³ / min or more, preferably 10 m ³ / min or more. The upper limit of the outflow air volume is not particularly limited, but is, for example, 20 m ³ / min or less, preferably 15 m ³ / min. If it is less than 5 m ³ / min, the adsorbent is difficult to be discharged. If it is 20 m ³ / min or more, the time required for recovery is fast, but the energy for moving the air supply / exhaust device BL used for the recovery means is too large, and the energy efficiency is not good.

The attachment means for allowing the adsorbent to flow in from the inlet / outlet portion 15 and adhere to the filtration filter 12 will be illustrated below. A means in which the entrance / exit unit 15 and the air supply / exhaust device BL are connected via an air pipe is constructed. It is assumed that the air pipe is equipped with a means for supplying the adsorbent. As an example of the means for supplying the adsorbent, a means for supplying the adsorbent to the air pipe from a storage container or the like in which an unused or regenerated adsorbent is stored can be adopted. By means of supplying the adsorbent, the stored adsorbent is mixed in the air pipe, and the air supply / exhaust device BL is pressurized. Then, the adsorbent passes through the air pipe together with the carrier gas from the air supply / exhaust device BL, is supplied to the filtration container 10 with a predetermined inflow air volume, and is urged to adhere to the filtration filter 12. As a result, an adsorbent layer is formed on the surface of the filtration filter 12. Further, the inflow air volume from the air supply / exhaust device BL and the gas air volume from the gas supply unit 11 and / or the bypass unit 17 may be supplied. Here, the predetermined inflow air volume for adsorbing the adsorbent to the filtration filter 12 may be only the inflow air volume flowing in from the inflow / outflow section 15, or the air volume supplied from the inflow / outflow section 15 and the gas supply section 11. It can be the total air volume with the air volume of the gas supplied from. The predetermined inflow air volume is not particularly limited as long as it is the air volume at which the adsorbent adheres to the filtration filter 12. The inflow air volume is, for example, 5 m ³ / min or more, preferably 10 m ³ / min or more. The upper limit of the inflow air volume is not particularly limited, but is, for example, 20 m ³ / min or less, preferably 15 m ³ / min. If it is less than 5 m ³ / min, it is difficult for the adsorbent to sufficiently adhere to the filtration filter 12. If it is 20 m ³ / min or more, it leads to excessive consumption of energy for moving the air supply / exhaust device BL used for the attachment means, which is not efficient.

Whether or not the adsorbent is sufficiently adhered to the filtration filter 12 can be determined based on the difference in air pressure between the supply part side and the discharge part side of the filtration filter 12 and the difference in the concentration of fine particulate matter. .. It is easy to judge sufficient adhesion based on the difference in concentration of fine particulate matter, and if the adsorbent is sufficiently adhered to the filtration filter 12, the concentration of fine particulate matter will be on the supply unit side. In the case of, it exceeds the lower limit of quantification, but on the discharge part side, it is less than the lower limit of quantification. As a densitometer for fine particulate matter, a known densitometer can be appropriately used, and for example, a product "Kitakawa type gas detector" manufactured by Komei Rikagaku Kogyo Co., Ltd. can be adopted.

For example, a roots blower or a vortex blower can be used as the air supply / exhaust device BL. One air supply / exhaust device BL may be provided for each of the above-mentioned attaching means and the collecting means (two units in total), or one unit may be provided for each means as shown in FIG.

The adsorbent entry / exit portion 15 can be provided in the filtration container 10. If there is no air flow, the adsorbent has the property of free-falling due to gravity under its own weight. Considering this property, for example, the entrance / exit portion 15 may be provided below the filtration filter 12 in the vertical direction, and particularly preferably below the lower portion of the filtration container 10 in the vertical direction. If it is provided below the filtration filter 12, the adsorbent that has peeled off from the filtration filter 12 and has fallen freely is collected under the filtration filter 12, so that the adsorbent can be easily discharged (outflow) and the amount of outflow air is small. There is an advantage that the adsorbent can flow out.

(Collection container)
As shown in FIG. 1, a recovery container 30 can be provided in the air pipe G2 of the recovery means. The gases C1 and C2 containing the adsorbent discharged from the inlet / outlet section 15 are introduced into the recovery container 30 from the air pipe G2, the adsorbent and the gas are separated in the recovery container 30, the adsorbent is recovered, and the gas C5 is supplied. It is exhausted by the exhaust operation of the exhaust device BL.

The collection container 30 covers the hopper 32 that collects the adsorbent, the upper end opening of the hopper 32, the filter 31 that prevents the adsorbent from scattering outside the hopper 32, and the mass of the adsorbent in the hopper 32. A measuring instrument 33 for measuring and a first damper V7 for cutting out the recovered adsorbent can be provided. The air pipe extending from the filter 31 to the air supply / exhaust device BL may be provided with a damper V6 for adjusting the exhaust amount, and the air pipe G2 extending from the inlet / outlet portion 15 to the collection container 30 is provided with a damper V5 for adjusting the exhaust amount. You may be.

Further, the collection container 30 can be provided with an exhaust means for discharging the adsorbent cut out by the first damper V7 as waste E to the outside of the system (see FIG. 9), and the adsorbent is applied to the recycling device 50. An introduction pipe to be introduced can also be provided (see FIG. 1).

(Storage container)
As shown in FIG. 1, the storage container 40 can be interposed in the air pipes F1 and F2 in the means for supplying the adsorbent from the adsorbent inlet / outlet portion 15 with a predetermined inflow air volume. The gas D1 supplied from the air supply / exhaust device BL is introduced into the storage container 40 through the air pipe, and the adsorbent mixed with the gas D1 in the storage container 40 extends from the storage container 40 to the inlet / outlet section 15. It flows into the filtration vessel 10 through F2.

The storage container 40 includes a hopper 42 for storing the adsorbent, a filter 41 that covers the upper end opening of the hopper 42 to prevent the adsorbent from scattering, and a measuring instrument 43 for measuring the mass of the adsorbent in the hopper 42. , A second damper V9 that cuts out the stored adsorbent can be provided. The air pipe F1 extending from the air supply / exhaust device BL to the filter 41 may be provided with a damper V8 for adjusting the amount of air supply, or may be provided with an air pipe F2 extending from the second damper V9 to the inlet / outlet portion 15. Further, the air pipe F3 can be provided by branching from the damper V8 of the air pipe F1 to the side where the air supply / exhaust device BL is installed, and the tip of the air pipe F3 is connected to the air pipe F2. Can be in the form of By providing the air pipe F3, the air volume of the carrier gas supplied from the inlet / outlet portion 15 to the filtration container 10 can be adjusted. Further, if the damper V8 is opened and the air is blown from the air supply / exhaust device BL to the storage container 40, it may be difficult to adjust the amount of the adsorbent cut out. The amount of cutting can be stabilized.

Further, a pipe for introducing the gas C4 containing the adsorbent regenerated by the regenerating device 50 into the storage container 40 can be provided.

The filters 31 and 41 can be used without limitation as long as they separate the gas and the adsorbent. For example, the material used for the filtration filter 12 can be used as the material for the separation filter 31 and the air supply filter 41. By making the material of the separation filter 31 and the air supply filter 41 the same as the material of the filtration filter 12, it is not necessary to prepare various materials, and the labor required for manufacturing can be saved.

(1st processing flow)
An example of a flow for removing fine particulate matter will be described with reference to FIG. The initial state is that no adsorbent is attached to the filtration filter 12, an unused or regenerated adsorbent is stored in the storage container 40, and all the dampers V1 to V10 are fully closed.

<Adhesion process>
First, open the dampers V3, V9, and V10 in the initial state. The damper V8 may be opened or kept closed as needed. The air supply / exhaust device BL is set to pressurization operation. The adsorbent in the hopper 42 is cut out from the second damper V9, passes through the air pipe F2, is mixed with the gas D3 in the air pipe F3 to become the gas D4 containing the adsorbent, and this gas D4 enters and exits. It is supplied from 15 into the filtration container 10. The amount of the adsorbent cut out from the storage container 40 is preferably at least 60 minutes or more from the start of the adsorption process to the breakage of the adsorbent layer.

The gas D4 will be supplied with a predetermined air volume, but in addition to the supply of the gas D4, the exhaust gas A may be supplied from the bypass portion 17 with the damper 2 open. An air supply device 19a, which is installed on the upstream side of the gas supply unit 11 and supplies the exhaust gas A to the filtration container 10, is operated so that the exhaust gas A is supplied to the filtration container 10. By doing so, even if the discharge air volume of the air supply / exhaust device BL is less than the air volume required for the adsorbent to adhere, the adsorbent is urged to sufficiently adhere to the filtration filter 12. Further, when the bypass portion 17 is provided at the bottom of the filtration container 10 and the gas A is supplied from the bypass portion 17, it is compared with the case before the supply of the gas A (that is, when only the gas D4 is supplied). , The airflow in the filtration vessel changes. Due to the change in the air flow, for example, the adsorbent deposited in the snowdrift at the bottom soars up and easily adheres to the filtration filter 12. Although the exhaust gas A is supplied from the bypass unit 17 in the above description, the exhaust gas A may be supplied from the gas supply unit 11 by adjusting the opening degree of the damper V1.

When the adsorbent is adhered to the filtration filter 12 and the adsorbent layer is formed, the adsorbing step is completed and the process proceeds to the adsorbing step.

<Adsorption process>
The dampers V2 to V10 are fully closed, the air supply / exhaust device BL is stopped, and the process proceeds to the suction step. The air supply device 19a is operated to generate an air flow in which the exhaust gas A supplied from the gas supply unit 11 passes through the filtration filter 12 and the permeated gas B is discharged from the gas discharge unit 13. When the permeation amount of the exhaust gas A reaches a predetermined amount, the adsorbent begins to break through. The damper V1 is closed and the air supply device 19a is stopped at or just before the breakage of the adsorbent begins. As an example, it is advisable to use a densitometer to determine whether or not the adsorbent has ruptured. For example, when the densitometers 62 and 62 are installed in the space on the supply unit side and the space on the discharge unit side of the filtration container 10, respectively, and the numerical value of the densitometer installed in the space on the discharge unit side starts to increase, Judge that it was a breakthrough. It is not necessary to install a densitometer in the space on the supply unit side of the filtration vessel 10.

The installation positions of the densitometers 62 and 62 are not particularly limited. For example, if the densitometer 62 is installed in the space on the discharge unit side, it may be installed in or near the gas discharge unit 13, and if the densitometer 62 is installed in the space on the supply unit side, it may be installed in the gas supply unit 11 or this. It is recommended to install it in the vicinity. The gas discharge portion 13 or the vicinity thereof is a place where the permeated gas B gathers, and tends to be an average measured value. The gas supply unit 11 or its vicinity is also a position before the exhaust gas A containing the fine particulate matter is diffused, and tends to be an average measured value.

As shown in FIG. 5, when the adsorbent generally breaks, the concentration [C] of the fine particulate matter (that is, the concentration of the concentration meter 62 installed on the discharge part side) gradually increases, and the adsorbent functions. It is known to disappear. In particular, the time when the concentration [C] of the fine particulate matter begins to rise is called the breakthrough point 61. FIG. 5 shows a breakthrough curve 60 when acetaldehyde gas is exposed to the adsorbent using coconut shell activated carbon as the adsorbent, the vertical axis shows the acetaldehyde concentration [C], and the horizontal axis shows the time [T]. There is.

The adsorption step is completed and the process proceeds to the peeling step when the adsorbent is determined to have broken through or when the gas A containing the fine particulate matter is supplied for a predetermined time.

<Peeling process>
The peeling step may be performed with all the dampers V1 to V10 fully closed, but the dampers V5 and V6 may be opened in order to release the gas. After adjusting the dampers V1 to V10 in this way, compressed air is injected from the injection nozzle 14. When the compressed air is injected, the filtration filter 12 swells toward the discharge portion, deforms or vibrates, and the adsorbent attached to the filtration filter 12 is peeled off from the filtration filter 12. The peeled adsorbent falls freely. In particular, when the filtration filter 12 is the above-mentioned pleated filter, the pleated filter is stretched on the holding body 18 and vibrates in response to the injection of compressed air, and the adsorbent adhering to the filter is peeled off.

When a plurality of pairs of the filtration filter 12 and the injection nozzle 14 are installed, the compressed air is injected from the first injection nozzle 14, then from the second injection nozzle, and then from the third injection nozzle. Then, from the fourth injection nozzle, it is possible to sequentially inject, and so on. Further, after sequentially injecting and making a round, another round, the first injection nozzle 14 may sequentially inject. Further, compressed air may be injected all at once from a plurality of injection nozzles 14, 14, .... When compressed air is injected, it makes a loud noise, but when it is injected sequentially, the volume becomes lower than when it is injected all at once. On the other hand, if compressed air is injected all at once from a plurality of injection nozzles 14, 14, ..., The time of the peeling step is shortened. Further, the change in the air pressure in the filtration container 10 becomes larger when the injection is performed all at once than when the injection is performed sequentially, and the peeling of the adsorbent is further promoted.

The peeling step is completed at the stage where the injection of the injection nozzle 14 is completed (when there are a plurality of injection nozzles 14, the stage where the injection of all the injection nozzles 14 is completed), and the process proceeds to the recovery step.

<Recovery process>
The recovery step is performed by opening the dampers V3, V5, and V6 of the dampers V1 to V10, fully closing the remaining damper group, and operating the air supply / exhaust device BL in a negative pressure operation. The adsorbent, which is located in the space on the supply portion side of the filtration container 10 and is peeled off in the peeling step, is sucked together with the gas from the inlet / outlet portion 15 at a predetermined outflow air volume and guided to the recovery container 30.

Regarding the aspect of the collection container 30, for example, the hopper 32 and the filter 31 covering the upper opening of the hopper 32 may be integrated to form a wall. This container has an adsorbent introduction section introduced from the air pipe G2 and a lead-out section in which the gas that has passed through the filter 31 is exhausted (sucked) to the air supply / exhaust device BL side. When the air supply / exhaust device BL is stopped or the damper 6 is fully closed when the collection of the adsorbent into the collection container 30 is completed, the adsorbent is accumulated in the hopper 32.

The storage container 40 is provided with a measuring instrument 43, and the collecting container 30 is provided with a measuring instrument 33, so that the masses of the adsorbents accumulated in the storage container 40 and the collection container 30 can be measured. Therefore, if the total mass of the adsorbent cut out from the recovery container 30 in the adhesion step and the total mass of the adsorbent recovered in the recovery container 30 in the recovery step are compared, the adsorbent can be easily recovered in the recovery container 30. You can see if is complete. For example, the recovery rate of the adsorbent can be obtained by the following equation [Equation 1].
[Number 1]
(Recovery rate (%) of adsorbent) = (total mass of adsorbent recovered in the hopper 32 in the recovery step) / (total mass of adsorbent cut out from the recovery container 30 in the adhesion step) × 100

In this embodiment, for example, if the recovery rate is 90% or more, more preferably 95% or more, it can be said that the recovery is completed.

In this embodiment, the adsorbent adhering to the filtration filter 12 is peeled off by the local injection of compressed air by the injection nozzle 14 in the peeling step, and is predetermined by the negative pressure operation by the air supply / exhaust device BL in the recovery step. It is sucked by the amount of outflow air and collected. Therefore, this embodiment has an excellent recovery rate of the adsorbent.

On the other hand, Patent Document 1 states that the adsorbent is separated from the filtration filter 12 by back blowing, hammering, vibration by a spring, or the like. However, even if the back air is blown, the air pressure is not locally injected to the filtration filter as in the present embodiment, but the air pressure is applied to the entire plurality of filtration filters, so that the adsorbent can be sufficiently peeled off. It may not be done. In addition, hammering, vibration due to a spring, etc. may reduce the durability of the filtration filter early. Further, although the peeled adsorbent is to be recovered in the recovery tank, it is assumed that the peeled adsorbent remains on the bottom of the filtration container and is not guided to the recovery tank. Considering these, it is hard to say that the recovery efficiency of the adsorbent is good in Patent Document 1.

When the dampers V5 and V6 are opened in the peeling step, the peeling step and the recovery step may be performed at the same time.

<Regeneration process>
When the regeneration step is performed, the adsorbent collected in the storage container 40 contains fine particulate matter, and the fine particulate matter is desorbed and / or oxidatively decomposed and regenerated. The regenerated adsorbent is attached to the filtration filter 12 again, and can be used for further adsorption of fine particulate matter.

The adsorbent cut out from the collection container 30 is introduced into the regeneration device 50 and heat-treated to remove and / or oxidatively decompose the fine particulate matter. The regenerating device 50 includes a batch processing type and a continuous processing type, and the processing amount of the adsorbent per unit time of the regenerating device 50 differs depending on these types. Therefore, the amount of the adsorbent cut out from the collection container 30 may be adjusted by the first damper V7 according to the type of the regeneration device 50.

The heat-treated adsorbent is sent to the collection container 40. The collection container 40 is provided with a measuring instrument 43, and can measure the total mass of the adsorbent stored in the collection container 40. The regeneration step is completed when the process of sending the regenerated adsorbent to the collection container 40 is completed.

The first treatment flow repeats the process including the above, and by repeating this flow, fine particulate matter is removed.

It takes 60 to 120 seconds to replace the adsorbent layer attached to the filtration filter 12, specifically, 5 to 10 seconds for the peeling step, 30 to 60 seconds for the recovery step, and 30 to 60 seconds for the sticking step. When the adsorbent is regenerated, the regeneration step takes 180 to 300 seconds. Further, if the recovery step is completed, the regeneration step can be performed at the same time as the adhesion step, so that the time required for replacing the adsorbent layer attached to the filtration filter 12 does not include the time required for the regeneration step. The filtration filter 12 may be rapidly regenerated. Then, the time for stopping the work of handling the fine particulate matter can be shortened, and the work becomes efficient.

On the other hand, in the system for removing fine particulate matter using a so-called honeycomb rotor disclosed in Japanese Patent Application Laid-Open No. 2017-87150, the adsorbent is stopped while the work of handling the fine particulate matter is stopped. Must desorb the adsorbed fine particulate matter for cooling. As a result, it takes a long time to stop the work of handling fine particulate matter, and it is hard to say that the work can be performed efficiently.

(1st processing flow deformation)
There is also a method of replacing the adsorbent layer attached to the filtration filter 12 while continuing the work of handling the fine particulate matter. This method is shown below.

As illustrated in FIG. 10, a plurality of filtration containers 10 are installed. For example, it is preferable to install three or more filtration containers 10, preferably five or more, and more preferably 10 to 15 filtration containers. Explaining the case where five units are installed as an example, the filtration containers 10a, 10b, 10c, 10d, and 10e are operated at the same time. If the adsorbent layer of the filtration vessel 10a breaks through the earliest, the operation of the filtration vessel 10a is stopped. According to the first treatment flow described above, the filtration container 10a is sequentially subjected to a peeling step, a recovery step (regeneration step if the regeneration device 50 is provided), and an adhesion step, and adsorption attached to the filtration filter 12. Replace the agent layer. After that, an adsorption step is performed.

Next, when the adsorbent layer of the filtration vessel 10b breaks through, the operation of the filtration vessel 10b is stopped. According to the first treatment flow described above, the same steps as those performed for the filtration vessel 10a described above are performed on the filtration vessel 10b, and the adsorbent layer adhering to the filtration filter 12 is replaced. After that, an adsorption step is performed.

Further, when the adsorbent layer of another filter container 10 is broken, it is preferable to perform the same steps and the adsorption steps as those performed on the filter container 10a.

In this way, by stopping the filtration container 10 in which the adsorbent layer has broken and continuing the operation of the other filtration containers 10, the operator can continuously perform the work in an atmosphere where fine particulate matter is generated. It can be carried out.

(Second processing flow)
The second processing flow will be described with reference to FIG. There are two differences between the second processing flow and the first processing flow. The first point is that there is no air supply / exhaust device BL, but the exhaust device BL1 and air supply device BL2 are provided, and the second point is regeneration. The point is that the adsorbent collected in the collection container 30 without the device 50 is regarded as waste E.

<Adhesion process>
The adhesion step of the second treatment flow is almost the same as the adhesion step of the first treatment flow, but the point that the air supply device BL2 is used in the second treatment flow instead of the air supply / exhaust device BL used in the first treatment flow. Is different.

<Adsorption process, peeling process>
The adsorption step and the peeling step of the second treatment flow are the same as the adsorption step and the peeling step of the first treatment flow.

<Recovery process>
The recovery process of the second treatment flow is almost the same as the recovery step of the first treatment flow, but the exhaust device BL1 is used in the second treatment flow instead of the air supply / exhaust device BL used in the first treatment flow. different.

<Disposal process>
In the disposal step, the adsorbent collected in the collection container 30 is discarded as waste E. For example, when it is desirable that the adsorbent layer is formed of an unused adsorbent, or when foreign matter is adsorbed on the adsorbent and the adsorption performance of fine particulate matter deteriorates, the adsorbent becomes difficult to regenerate. In some cases, the adsorbent should be discarded.

Using the exhaust gas treatment device of this embodiment, the removal performance of toluene was investigated. Toluene was sprayed into a container having a predetermined volume with a so-called spray gun for painting work. The injection amount was 0.1 kg / min. The air volume of the gas containing toluene in the treatment device was set to 150 m ³ / min. The toluene used in the examples was toluene (toluene concentration 99.9% or more) manufactured by Dan Chemical Co., Ltd. The toluene concentration was measured with a "Kitakawa gas detector VOC (microparticulate matter) concentration meter". As the adsorbent, powdered activated carbon "Kuraraycol PK-D (registered trademark)" manufactured by Kuraray Chemical Co., Ltd. was used. The rate of cutting out the activated carbon from the storage container 40 was set to 1 kg / min. A pleated filter was used as the filtration filter 12, and G2260-1S BK0 of Toray Industries, Inc.'s polyester long fiber non-woven fabric "Axter" (registered trademark) was used as the material. The activated carbon was adhered to the filtration surface of the filtration filter in layers so that the thickness of the layer was 3 mm and the adhesion amount was 1.5 kg / m ² .

Gas was supplied from the container in which toluene was injected to the gas supply unit 11 of the filtration container 10 at an air volume of 150 m ³ / min. The toluene concentrations of the gas supply unit 11 and the gas discharge unit 13 were measured at predetermined time intervals (elapsed time). The concentration of toluene contained in the supplied gas was changed to make Test Example 1 to Test Example 4. The measurement results are shown in Table 1.

The toluene concentration in the gas discharge part was 0 ppm in all the elapsed times in Test Examples 1 to 4. From this result, it can be seen that the removal rate of toluene is 100%. The removal rate can be obtained from the following equation [Equation 2].
[Number 2]
(Toluene removal rate (%)) = ((Toluene concentration in gas supply section)-(Toluene concentration in gas discharge section)) ÷ (Toluene concentration in gas supply section) x 100

In the rotor type fine particulate matter processing apparatus represented by Patent Document 3, the rotor is, for example, a honeycomb rotor type, and an adsorbent is attached to the rotor. When the gas containing the fine particulate matter passes through a large number of holes provided in the honeycomb rotor, the fine particulate matter is adsorbed by the adsorbent attached to the inner wall of these pores. However, in this shape, the pores are not blocked by the adsorbent, so that a part of the fine particulate matter is not adsorbed and permeates the pores. As a result, the removal rate of fine particulate matter in the rotor type is about 80 to 90%. When compared in terms of removal rate, it can be said that the processing apparatus of the present invention is superior to the rotor type processing apparatus.

(Additional note)
In addition to the above-described embodiments, desirable embodiments are shown below.
<Appendix 1>
It is a method of treating exhaust gas by an exhaust gas treatment device equipped with an adsorbent that adsorbs fine particulate matter of the exhaust gas generated in the building.
The exhaust gas treatment device includes a filtration container for separating the fine particulate matter from the exhaust gas.
The filtration container has a supply part and a discharge part of the exhaust gas, a filtration filter to which the adsorbent can be attached and detached, and an inlet / outlet part of the adsorbent.
The exhaust gas is supplied to the filtration container from the supply unit, passes through the filtration filter, and is discharged from the discharge unit.
A bonding step of allowing the adsorbent to flow in from the inlet / outlet portion and adhering to the filtration filter, a peeling step of injecting compressed air into the filtration filter after the bonding step to peel off the adsorbent, and a peeling step of peeling the adsorbent after the peeling step. It has a recovery step of sucking and recovering the peeled adsorbent from the entrance / exit portion to the outside of the filtration container.
A method of treating exhaust gas, which is characterized by the fact that.
<Appendix 2>
The peeling step is a step performed without spraying the adsorbent.
The method for treating exhaust gas according to Appendix 1.
<Appendix 3>
The tensile strength of the filtration filter is 1000 to 1300 N / 5 cm in length and 700 to 800 N / 5 cm in width.
The peeling means injects compressed air at 0.5 to 0.7 Mpa for 0.1 to 0.2 seconds.
The method for treating exhaust gas according to Appendix 2.
<Appendix 4>
The bottom portion of the filtration container is located on the supply portion side, and the bottom portion is provided with the entrance / exit portion and a bypass portion for supplying the exhaust gas to the filtration container.
The method for treating exhaust gas according to Appendix 2.
<Appendix 5>
Moreover,
It has a regeneration step of heating and regenerating the adsorbent recovered by the recovery means at 220 to 350 ° C.
The adhesion step is a step of allowing the adsorbent regenerated in the regeneration step to flow in from the inlet / outlet portion and adhere to the filtration filter.
The exhaust gas treatment device according to Appendix 1.
<Appendix 6>
The recovery step includes a recovery container for recovering the adsorbent.
The recovery container includes a measuring instrument for measuring the mass of the recovered adsorbent and a first damper for cutting out the adsorbent.
The cut-out adsorbent is introduced into the regenerator.
The method for treating exhaust gas according to Appendix 5.
<Appendix 7>
It has a storage container for storing the adsorbent regenerated in the regeneration step, and has a storage container.
The storage container includes a measuring instrument for measuring the mass of the stored adsorbent and a second damper for cutting out the adsorbent.
In the adhesion step, the cut-out adsorbent is allowed to flow into the filtration container.
The method for treating exhaust gas according to Appendix 5.

(Definition, etc.)
-Volatile organic compounds included in the concept of microparticulate substances are benzene, trichlorethylene, tetrachloroethylene, and dichloromethane, which are substances specified in the environmental standards for harmful air pollutants, and formaldehyde, which is an indoor pollutant. , Acetaldehyde, toluene, xylene, ethylbenzene, styrene, paradichlorobenzene, tetradecane, chlorpyriphos, phenocarb, diazinone, di-n-butyl phthalate, di-2-ethylhexyl phthalate. In addition, as fine particulate matter, chloroform, carbon tetrachloride, toluene, benzene, formaldehyde, which are stipulated in Appendix 6-2 of the Construction Ordinance of the same law, according to the Organic Solvent Poisoning Prevention Regulations established based on the Industrial Safety and Health Law. 54 kinds of organic solvents such as acetone, isobutyl alcohol, isopropyl alcohol, ethyl ether, xylene, dichloromethane, styrene, tetrachloroethylene, trichloroethylene, toluene, normal hexane, methanol, methyl isobutyl ketone, methyl ethyl ketone, methyl-normal-butyl ketone, etc. It can, but is not limited to these.
-Gas containing fine particulate matter also includes gas containing water.
The upstream direction US is a straight line connecting the gas supply part and the gas discharge part in the filtration container 10 and refers to the direction on the gas supply part side, and the downstream direction DS is the same straight line and the gas discharge part. Can say the direction of. Further, when the filtration filter 12 is a bag-shaped filter and a straight line connecting the opening side of the filter and the closed side facing the opening is assumed, this straight line is in the direction of the opening side. Can be referred to as a downstream DS, and the closed side facing the opening can be referred to as an upstream US.

This exhaust gas treatment device and removal method can be used in an environment where fine particulate matter is generated.

10 ... Filtration container, 11 ... Gas supply section, 12 ... Filter filter, 13 ... Gas discharge section, 14 ... Injection nozzle, 15 ... In / out section, 17 ... Bypass section, 30 ... Recovery container, 40 ... Storage container, 50 ... Regeneration Equipment, BL ... Air supply / exhaust device, 100 ... Exhaust gas treatment device.

Claims (10)

It is an exhaust gas treatment device equipped with an adsorbent that adsorbs fine particulate matter of the exhaust gas generated in the building.
The exhaust gas treatment device includes a filtration container for separating the fine particulate matter from the exhaust gas.
The filtration container has a supply part and a discharge part of the exhaust gas, a filtration filter to which the adsorbent can be attached and detached, and an inlet / outlet part of the adsorbent.
The exhaust gas is supplied to the filtration container from the supply unit, passes through the filtration filter, and is discharged from the discharge unit.
Adsorption means that allows the adsorbent to flow in from the inlet / outlet portion and adheres to the filtration filter, peeling means that injects compressed air into the filtration filter to peel off the adsorbent, and the outside of the filtration container from the inlet / outlet portion. to, possess a recovery means for recovering by suction peeled the adsorbent,
The recovery means has a recovery container for recovering the adsorbent.
The recovery container includes a measuring instrument for measuring the mass of the recovered adsorbent and a first damper for cutting out the adsorbent.
The recovery rate of the adsorbent is 90% or more.
An exhaust gas treatment device characterized by this.
Here, the recovery rate of the adsorbent can be obtained by the following equation [Equation 1].
[Number 1]
(Recovery rate of adsorbent (%)) = (total mass of adsorbent recovered in the recovery container) / (total mass of adsorbent cut out from the recovery container) × 100 The peeling means is performed without spraying the liquid on the adsorbent.
The exhaust gas treatment device according to claim 1. The tensile strength of the filtration filter is 1000 to 1300 N / 5 cm in length and 700 to 800 N / 5 cm in width.
The peeling means injects compressed air at 0.5 to 0.7 Mpa for 0.1 to 0.2 seconds.
The exhaust gas treatment device according to claim 1 or 2. The bottom portion of the filtration container is located on the supply portion side, and the bottom portion is provided with the entrance / exit portion and a bypass portion for supplying the exhaust gas to the filtration container.
The exhaust gas treatment device according to claim 1 or 2. Moreover,
It has a regenerating device that regenerates the adsorbent collected by the collecting means by heating it at 220 to 350 ° C.
The adsorbing means causes the adsorbent regenerated by the regenerating device to flow in from the entrance / exit portion and adhere to the filtration filter.
The exhaust gas treatment device according to any one of claims 1 to 4. It has a storage container for storing the adsorbent regenerated by the regenerating device, and has a storage container.
The storage container includes a measuring instrument for measuring the mass of the stored adsorbent and a second damper for cutting out the adsorbent.
The attaching means causes the cut-out adsorbent to flow into the filtration container.
The exhaust gas treatment device according to claim 5. The fine particulate matter is removed by using the exhaust gas treatment apparatus according to any one of claims 1 to 6.
A method of treating exhaust gas, which is characterized by the fact that. Before supplying the exhaust gas to the filtration vessel,
The adsorbent is allowed to flow into the filtration vessel together with the carrier gas and adhered to the filtration filter to form an adsorbent layer.
The method for treating exhaust gas according to claim 7. At the stage when the adsorbent layer is broken,
A step of injecting compressed air to peel off the adsorbent adhering to the filtration filter is performed.
The method for treating exhaust gas according to claim 8. A recovery step in which the adsorbent constituting the peeled adsorbent layer is sucked from the entrance / exit portion and discharged to be recovered.
After the recovery step, the recovered adsorbent is heated to 220 to 350 ° C. and introduced into a regenerating device to regenerate the adsorbent to obtain the regenerated adsorbent.
After the regeneration step, the regenerated adsorbent is allowed to flow into the filtration container and adhered to the filtration filter to form an adsorbent layer.
The method for treating exhaust gas according to claim 9.

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