JP2934878B2 - Method and apparatus for removing organic substances and the like attached to a honeycomb rotor of a honeycomb type dehumidifier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is applied to a honeycomb rotor of a honeycomb type dehumidifier used for drying powders and granules which are raw materials of plastics, pharmaceuticals, processed foods and the like. The present invention relates to a method and an apparatus for removing organic substances such as various synthetic resins and plasticizers.

[Conventional technology]

Conventionally, as a method (apparatus) for drying this kind of granular material such as plastic, a tower is filled with an adsorbent such as molecular sieve (trade name) and the air to be dehumidified and dried is filled therein. It is known to obtain low-humidity dry air (gas) through the above-mentioned gas, and to repeatedly use two or several such towers and repeat adsorption and regeneration. In this method, when the powdery material to be dehumidified and dried or an organic substance such as a plasticizer adheres to an adsorbent such as a molecular sieve and the moisture absorbing ability of the adsorbent is reduced, replace the adsorbent with a new one. The replacement work was troublesome and uneconomical. Further, when the moisture absorption of the adsorbent approaches a saturated state, it becomes difficult to obtain a low dew point and the dew point is unstable.

In order to solve the above-mentioned drawbacks, as disclosed in Japanese Utility Model Application Laid-Open Nos. 56-14622 and 63-6031, a honeycomb impregnated with a molecular sieve or the like is used as an adsorbent element. The cylindrical (rotor) -shaped rotor is used, and the gas (air) flow passage of the honeycomb rotor is divided into a dehumidification section and a regeneration section, or a dehumidification section, a regeneration section and a cooling section. Then, in the dehumidifying section, the wet gas to be treated is dehumidified and dried, and in the regenerating section, the adsorbing element of the honeycomb rotor is removed to remove the water adsorbed to regenerate the adsorbing capacity of the adsorbing element. A honeycomb type dehumidifier, which prevents the temperature of the adsorbent element from rising due to the heat storage accompanying the regeneration and repeats two steps of adsorption and regeneration or three steps of adsorption, regeneration and cooling continuously. Provided.

[Problems to be solved by the invention]

However, Japanese Utility Model Application Laid-Open No. 56-14622 and Japanese Utility Model Application
No. 6031, various plasticizers generated in the drying section and the like when the processing gas dehumidified by the honeycomb type dehumidifier is supplied to a drying section such as a hopper dryer to dry materials such as plastic powders. And the like circulate and adhere to the adsorbent element of the honeycomb rotor. Of these deposits, specific organic substances are not only difficult to remove even with a filter, but the organic substances react with the adsorbent elements of the honeycomb rotor and adhere stubbornly to the adsorbent elements, so that even the hot air in the regeneration area is difficult. It was difficult to remove. Therefore, there is a problem that the moisture absorbing ability of the adsorbent element is reduced.

An object of the present invention is to provide a solution to the above-mentioned problems of the prior art.

[Means for solving the problem]

In order to solve the above problems, a method for removing organic substances and the like attached to a honeycomb rotor according to the present invention includes forming a honeycomb rotor of a honeycomb type dehumidifier into a dehumidifying area, a regeneration area, and a cooling area, and attaching the honeycomb rotor to the honeycomb rotor. A method for removing organic substances and the like, wherein the honeycomb rotor is provided with a slit-shaped cleaning area in addition to the three areas, and the honeycomb section is provided with respect to the cleaning area based on a decomposition temperature of organic substances and the like attached to the honeycomb rotor. Hot air at an arbitrary temperature up to the maximum temperature at which the adsorbent element of the rotor does not thermally deteriorate is passed at an appropriate surface wind speed to remove organic substances and the like attached to the honeycomb rotor.

The apparatus for removing organic substances and the like attached to the honeycomb rotor of the present invention is an apparatus for forming a honeycomb rotor of a honeycomb type dehumidifier into a dehumidifying section, a regeneration section, and a cooling section to remove organic substances and the like attached to the honeycomb rotor. In the above, a slit-shaped cleaning area is provided at an appropriate position such as between the dehumidification area and the regeneration area or between the regeneration area and the cooling area, and the adsorbent element of the honeycomb rotor is provided in the cleaning area from the decomposition temperature of organic substances and the like. A hot air supply member for supplying hot air at an arbitrary temperature up to a maximum temperature at which thermal deterioration does not occur is provided.

Here, as described above, the temperature of the hot air is selected from a temperature not lower than the decomposition temperature of the organic substance to be removed and not higher than the maximum temperature at which the adsorbent element of the honeycomb rotor is not thermally degraded.

The specific configuration for supplying hot air can be variously adopted, but it can be adopted at an appropriate position such as between the dehumidifying area and the regenerating area of the honeycomb rotor of the honeycomb dehumidifier or between the regenerating area and the cooling area. It is preferable that a slit-shaped cleaning area is provided, and hot air is supplied to the cleaning area from a hot air supply member that supplies hot air at the above-mentioned arbitrary temperature.

After the hot air is passed through the cleaning area of the honeycomb rotor, it is preferable that cold air is passed.

The specific configuration for supplying the cool air can be variously adopted, but in the cleaning area on the downstream side when viewed from the rotation direction of the honeycomb rotor of the honeycomb dehumidifier,
Preferably, a cool air supply member is provided adjacent to the hot air supply member, and cool air is supplied from the cool air supply member to the adsorbent element.

[Action]

The hot air at an arbitrary temperature from the decomposition temperature of organic substances or the like attached to the honeycomb rotor to the maximum temperature at which the adsorbent element of the honeycomb rotor does not thermally degrade is applied to the adsorbent element in the cleaning area of the honeycomb rotor at an appropriate surface wind speed (for example, Since the air is passed at a wind speed of 1 m or more), organic substances and the like adhering to the adsorbent elements of the honeycomb rotor are decomposed and removed by the hot air. At this time, the honeycomb rotor rotates in a fixed direction so as to return from the dehumidifying section to the dehumidifying section through the regeneration section and the cooling section. Since the entire area of the adsorbent element is ventilated by the hot air, the honeycomb rotor adheres to the adsorbent element. Organic substances and the like that have been removed are efficiently removed.

In addition, since the hot air is at an arbitrary temperature up to the maximum temperature at which the adsorbent element of the honeycomb rotor does not thermally degrade, heat deterioration such as burning of the adsorbent element does not occur. However, there is a risk that the hot air is stored in the adsorbent element and the temperature rises, causing a risk of thermal deterioration such as burning of the adsorbent element. Should be ventilated.

The supply of the hot air is preferably performed from a hot air supply member provided in a cleaning area in a radial direction of the honeycomb rotor, but other configurations may be used.

The supply of the cool air is preferably performed from the cool air supply member adjacent to the hot air supply member on the downstream side of the cleaning section, but other configurations may be used.

〔Example〕

One embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a perspective view of a honeycomb rotor, a hot air supply member and a cold air supply member, FIG. 2 is an enlarged perspective view of a hot air supply member and a cold air supply member, and FIG. 3 is a schematic diagram of the whole.

1 is a honeycomb rotor of a honeycomb type dehumidifier,
The adsorbent element 2 of the honeycomb rotor 1 is, for example, a ceramic fiber impregnated with synthetic zeolite or molecular sieve (trade name) as a main component, a ceramic fiber impregnated with silica gel as a main component, or asbestos laminated. Rolled into a cylindrical shape and impregnated with lithium chloride as the main component,
Etc. are optional.

Air (gas) of the adsorbent element 2 of the honeycomb rotor 1
[The passage is formed by a spacer and a cover as shown in Japanese Utility Model Application Laid-Open No. 60-123535 filed by the present applicant, or by any other configuration, the dehumidifying area A, the regeneration area B, and the cooling area C are formed. It is formed.

Accordingly, the adsorbent element 2 of the honeycomb rotor 1 of this embodiment is rotationally displaced in the order of the dehumidification area A, the regeneration area B, and the cooling area C.

The dehumidifying section (a) is formed as a dehumidifying circulation line (a) through a dehumidifying pipe (3), the regenerating section (b) is formed as a regenerating line (b) through a regenerating pipe (4), and the cooling section (c) branches off from the middle part of the dehumidifying pipe (3). A cooling circulation line c is provided through a cooling pipe 5 connected to the rear part.

That is, the dehumidification circulation line a is provided with a dehumidification heater 6 and a dehumidification blower 7 in front of the dehumidification pipe 3, and the gas such as air to be dehumidified from the dehumidification blower 7 is supplied to the gas inlet 8 of the dehumidification area A. And the moisture of the gas is adsorbed on the adsorbent element 2 of the honeycomb rotor 1, and the obtained dehumidified gas passes through a gas discharge port 9 through a drying heater 10 and contains a material to be dried. The gas flows through a drying section 11 such as a dryer, and is returned to the gas inlet 8 via the cooling device 12 disposed behind the drying section 11 via the dehumidifying blower 7 so as to be circulated and used.

The regeneration line b is a one-pass type in which regeneration air flows through the honeycomb rotor 1 in a direction opposite to that of the dehumidification circulation line a, and is taken in from a filter 13 attached to one end of the regeneration pipe 4 and a regeneration blower 14. The outside air is heated by a regeneration heater 16 provided in front of the regeneration air inlet 15 of the regeneration zone B, and the hot air is supplied from the regeneration air inlet 15 to the adsorber element 2.
The remaining moisture is removed and exhausted out of the system via the regeneration air outlet 17. The reproduction line b may be of a closed type.

The cooling circulation line c feeds the cooling gas in the same direction as the dehumidification circulation line a. In this embodiment, the cooling device 12 of the dehumidification circulation line a is also used as a cooling device of the cooling circulation line c. One end of the cooling pipe 5 branches off from the rear position of the cooling device 12, and the other end is connected to the dehumidifying circulation line a at the rear position of the dehumidifying air outlet 9 and in front of the cooling device 12. The cooling air from the cooling device 12 is returned from the cooling air inlet 18 to the cooling air inlet 18 via the cooling air outlet 19, and is used for circulation. According to this, as is well known, the cooling air prevents the temperature rise due to the heat storage of the adsorbent element in the regeneration area, and the cooling air in the cooling circulation line c and the air in the dehumidification circulation line a after discharging the drying unit 11. By mixing with
The adsorbent element 2 itself can be cooled with low-humidity air in combination with the water removal action in the regeneration line b, and the dehumidification (adsorption) efficiency can be improved.

A rotating shaft (not shown) is attached to a shaft hole 20 at the center of the honeycomb rotor 1. The rotating shaft is connected to a driving source (not shown) via a sprocket and a chain. The honeycomb rotor 1 is slowly rotated at a speed of about 3 to 20 rotations / hour via the above-mentioned rotary shaft by the reduced drive. However, this rotating means is, of course, optional.

A slit-shaped cleaning area D is provided at an appropriate position between the dehumidifying area A and the regeneration area B of the honeycomb rotor 1, and the adsorbent element 2 of the honeycomb rotor 1 is thermally degraded in the cleaning area D from the decomposition temperature of organic substances and the like. A hot air supply member 30 for supplying hot air at an arbitrary temperature up to the maximum temperature is provided.

Further, a cold air supply member 31 is provided adjacent to the hot air supply member 30 in the cleaning area d on the downstream side when viewed from the rotating direction of the honeycomb rotor 1.

That is, the shape and structure of the hot air supply member 30 and the cool air supply member 31 are not limited, but in this embodiment, 20 to 20 in the radial direction of the adsorbent element 2 of the honeycomb rotor 1.
A slit-shaped cleaning area of about 40 mm (not limited to this value) is provided.
The hot air outlet 30a and the cool air outlet 31a are connected by 10 to 20 so that the hot air outlet 30a of the hot air supply member 30 and the cold air outlet 31a of the cold air supply member 31 communicate with each other so that gas (air) does not leak.
The hot air supply member 30 and the cold air supply member 31 are formed integrally in a nozzle shape of about mm. The hot air supply port 30a and the tip of the cold air supply port 31a of the hot air supply member 30 and the cold air supply member 31,
The honeycomb rotor 1 is provided so as not to come into contact with the adsorbent element 2 of the honeycomb rotor 1 as close as possible so that the cleaning gas does not leak. Sealing means may be provided in a gap formed between the adsorbent element 2 and the hot air blowing port 30a and the cold air blowing port 31a.

Cleaning pipes 32 and 33 are connected to the base ends of the hot air supply member 30 and the cold air supply member 31, respectively.
A cleaning heater 34 and a cleaning blower 35 are provided in the cleaning area d connected to the cooling air supply member 31.
A cleaning blower 36 is connected to the cleaning pipe 33 connected to the cleaning pipe 33, and these constitute a cleaning line d.

As the cleaning blower for the cleaning pipe 33, a cleaning blower 36 can be used, or the dehumidifying blower 7 or the regeneration blower 14 can be used instead of the cleaning blower 36 and the cleaning blower 35. And cleaning piping 33
Instead of taking in the outside air from the blower, a cooling device (not shown) can be attached halfway.

The hot air from the hot air blowing port 30a of the hot air supply member 30 may be passed through the eyes of the adsorbent element 2 of the honeycomb rotor 1 at a wind speed of 1 m / sec or more, and the temperature of the hot air is, as described above, When the adsorbent element 2 of the honeycomb rotor 1 is at or above the decomposition temperature of organic substances or the like adhering to the adsorbent element 2 and is at or below the maximum temperature at which the adsorbent element 2 is not thermally deteriorated, for example, when a molecular sieve is used for the adsorbent element 2 It should be less than 440 degrees Celsius.

The cool air supply member 31 sends the cool air to the adsorbent element 2.
Adsorber element 2 by heating the decomposition temperature of organic substances
This is because it is necessary to cool rapidly so that heat is not stored.

The method of the present invention will be described using an apparatus for removing organic substances and the like attached to the honeycomb rotor. As described above, the honeycomb rotor 1 has a slit shape in addition to the dehumidification area A, the regeneration area B, and the cooling area C. A cleaning area d is provided, and hot air at an arbitrary temperature from a decomposition temperature of organic substances or the like attached to the honeycomb rotor 1 to a maximum temperature at which the adsorbent element 2 of the honeycomb rotor 1 does not thermally degrade is appropriately applied to the cleaning area d. The air is ventilated at the surface wind speed to remove organic substances and the like attached to the honeycomb rotor.

When the PPS resin powder is adhered to the molecular sieve of the adsorbent element 2 of the honeycomb rotor 1, hot air of 400 degrees Celsius is blown at a speed of 2 m / sec from the end face of the adsorbent element 2 into a slit like the hot air supply member 30. According to the experimental results supplied to the gas component contained in the PPS resin powder, sulfur dioxide,
According to the present invention, the adhering element 2 of the honeycomb rotor 1, which has been caulked with an organic substance such as an oligomer and has a reduced adsorbing ability, is obtained by removing the organic substance attached to the adsorbing element 2 according to the present invention. The adsorbing capacity of No. 2 has been remarkably recovered and can be reused.

(Modifications, etc.)

Hot air to the adsorbent element 2 of the honeycomb rotor 1 and / or
Alternatively, as shown in FIG. 4, the supply of the cold air may be such that the slit-shaped cleaning area d is provided between the regeneration area b and the cooling area c, and the cooling air is supplied to the cleaning area d.

The hot air supply member 30 and / or the cold air supply member 31
It can also be provided to supply from more than one location.

〔The invention's effect〕

(1) According to the first aspect of the invention, the honeycomb rotor of the honeycomb type dehumidifier blows hot air at an arbitrary temperature from a decomposition temperature of organic substances or the like attached to the honeycomb rotor to a maximum temperature at which the adsorbent elements of the honeycomb rotor do not thermally deteriorate. Since air is passed through the adsorbent element in the slit-shaped cleaning area at an appropriate surface wind speed, organic substances firmly attached to the adsorbent element of the honeycomb rotor are decomposed and removed.

Moreover, since the hot air is supplied at a temperature not higher than the maximum temperature at which the adsorbent element of the honeycomb rotor does not thermally degrade, heat is not stored in the adsorbent element by the hot air, so that the adsorbent element is heated to the given hot air temperature. Decomposition and removal of organic substances and the like which are kept in a close state and are difficult to separate are performed.

Further, since the adsorbent such as molecular sieve is decomposed at a temperature lower than the temperature at which the adsorbent does not thermally deteriorate, the adsorbing ability of the adhering material does not decrease.

(2) According to the second aspect of the present invention, after the hot air is passed through the adsorbent element in the cleaning area of the honeycomb rotor, the cool air is passed through the adsorbent element. Even in the case where the heat could not be supplied so as not to store the heat, the heat storage with the cold air can be completely prevented.

(3) According to the invention of claim 3, a slit-shaped cleaning area is provided at an appropriate position between the dehumidification area and the regeneration area of the honeycomb rotor, and a hot air supply member for supplying hot air to the cleaning area is provided. Therefore, while having the effect described in the above (1), organic substances and the like adhering to the adsorbent element can be continuously removed without removing the honeycomb rotor and the adsorbent element.

(4) According to the invention of claim 4, since the cold air supply member is provided in the cleaning area of the honeycomb rotor, the cool air can be passed from the cold air supply member to the adsorbent element of the honeycomb rotor. As described above, the temperature rise due to the heat storage of the adsorbent element can be prevented.

[Brief description of the drawings]

The drawings each show an embodiment of the present invention. 1 is a perspective view of a main part, FIG. 2 is a perspective view of a hot air supply member and a cool air supply member, FIG. 3 is a schematic view of the whole, and FIG. 4 is a left side of FIG. FIG. DESCRIPTION OF SYMBOLS 1 ... Honeycomb rotor 2 ... Adsorbent element 6 ... Dehumidification heater 11 ... Drying part 16 ... Regeneration heater 30 ... Hot air supply member 30a ... Hot air supply port 31 ... Cold air supply member 31a ... Cold air Ventilation port, 32, 33 Cleaning pipe 34 Cleaning heater 35 36 Cleaning blower B Dehumidification area B Regeneration area C Cooling area D Cleaning area a Cleaning circulation Line b: regeneration line c: cooling circulation line d: cleaning line

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Sho 56-14622 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) B01D 53/26

Claims (4)

(57) [Claims] 1. A method for forming a honeycomb rotor of a honeycomb type dehumidifier into a dehumidifying section, a regenerating section, and a cooling section to remove organic substances and the like attached to the honeycomb rotor. A slit-shaped cleaning area is provided in addition to the two areas, and hot air at an arbitrary temperature from the decomposition temperature of organic substances adhering to the honeycomb rotor to the maximum temperature at which the adsorbent element of the honeycomb rotor does not thermally deteriorate is provided to the cleaning area. A method of removing organic substances and the like adhering to the honeycomb rotor of the honeycomb type dehumidifier, wherein ventilation is performed at an appropriate surface wind speed to remove organic substances and the like adhering to the honeycomb rotor. 2. The method for removing organic substances and the like adhered to a honeycomb rotor of a honeycomb type dehumidifier according to claim 1, wherein the hot air is passed through the cleaning area of the honeycomb rotor and then the cold wind is passed. 3. An apparatus for partitioning a honeycomb rotor of a honeycomb type dehumidifier into a dehumidification area, a regeneration area, and a cooling area to remove organic substances and the like attached to the honeycomb rotor. Alternatively, a slit-shaped cleaning area is provided at an appropriate position, such as between the regeneration area and the cooling area, and hot air of any temperature from the decomposition temperature of organic substances to the maximum temperature at which the adsorbent element of the honeycomb rotor does not thermally deteriorate is provided in this cleaning area. An apparatus for removing organic matter and the like attached to a honeycomb rotor of a honeycomb type dehumidifier, comprising a hot air supply member for supplying air. 4. A honeycomb rotor for a honeycomb type dehumidifier according to claim 3, wherein a cooling air supply member is provided adjacent to said hot air supply member in a cleaning area on the downstream side as viewed from the direction of rotation of the honeycomb rotor. A device that removes organic matter and the like attached to the surface.