JP2881684B2 - Method for cooling and purifying combustion exhaust gas, device therefor and filter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for cooling and purifying an engine and other appropriate high-temperature combustion exhaust gas.

[0002]

2. Description of the Related Art Conventionally, exhaust gas of an engine contains a large amount of carbon particles and nitrogen oxides as soot components. Therefore these exhaust gases outside the engine deposits, the catalyst is re-burned with, or carbon or CO to carbon dioxide, NOx is a method of releasing in the N _2, the flowable adhesive material charged by the high-pressure discharge The removal method is adopted.

[0003]

However, in the former method, there is a problem in the durability of the catalyst, and the air must be heated, so that the equipment is costly and the maintenance is troublesome. . Also, in the latter method, the carbon adhered to the fluid adhesive substance is aggregated and becomes large, making it difficult to burn, so that it is difficult to reuse. Therefore, disposal of these fluid adhesives poses a problem.

[0004] The present invention has been made in view of the above points, is the most generated in the combustion system, paying attention to the characteristics of water generated in the gas state, and utilizing the state change. An object of the present invention is to provide a method of cooling and purifying combustion exhaust gas which is less practical and extremely high, and a device therefor to solve the above problems.

[0005]

SUMMARY OF THE INVENTION Accordingly, the invention of claim 1 provides a method for discharging hot exhaust gas to the outside air by contacting the exhaust gas with water for circulating use in an appropriate closed chamber. The heat evaporates the water, and the heat of vaporization lowers the temperature of the exhaust gas, thereby cooling the exhaust gas and decomposing and adsorbing solid particulates such as carbon powder and harmful gases such as carbon monoxide in the exhaust gas. And a method of cooling and purifying the combustion exhaust gas to be cooled.

According to a second aspect of the present invention, in a path for discharging high-temperature exhaust gas to the outside air, the exhaust gas is circulated in a suitable closed chamber to which a small amount of a dispersant such as a surfactant and a defoaming agent are added. When the water is brought into contact with water and the heat evaporates the water, and the heat of vaporization lowers the temperature of the exhaust gas, the exhaust gas is cooled, and solid fine particles such as carbon powder and carbon monoxide in the exhaust gas are cooled. And a method for cooling and purifying combustion exhaust gas that decomposes and adsorbs harmful gases such as.

In a third aspect of the present invention, a plurality of filters are connected in an appropriate closed chamber in a path for discharging high-temperature exhaust gas to the outside air, and the exhaust gas is passed through each of these filters. Pour circulating water to which a small amount of a dispersant such as a surfactant and an antifoaming agent are added to each filter.The exhaust gas passing through the filter is brought into contact with the water, and the heat evaporates the water. The heat reduces the temperature of the exhaust gas, thereby cooling the exhaust gas, decomposing solid particulates such as carbon powder in the exhaust gas and harmful gases such as carbon monoxide and adsorbing the water on the water. And a method of cooling and purifying combustion exhaust gas.

According to a fourth aspect of the present invention, a plurality of filters are connected in an appropriate closed chamber in a path for discharging high-temperature exhaust gas to the outside air, and the exhaust gas is passed through each of these filters. Before passing the exhaust gas through each of these filters, circulating water containing a small amount of a dispersant such as a surfactant and a defoaming agent is brought into contact with the exhaust gas, and the heat evaporates the water. By lowering the temperature of the gas, the exhaust gas is cooled, and at the respective filters, solid particulates such as carbon powder and the like in the exhaust gas and harmful gases such as carbon monoxide are decomposed and adsorbed on the water. A method of cooling and purifying exhaust gas by repeating steps of cooling and separation was adopted.

According to a fifth aspect of the present invention, a plurality of filters are connected in an appropriate closed chamber in a path for discharging high-temperature exhaust gas to the outside air, and at least an interface is provided before the filter is introduced into the foremost filter. The exhaust gas is passed or brought into contact with water to which a small amount of a dispersant such as an activator and an antifoaming agent has been added, and a tank is provided so that the water surface of the water is located below each of the filters. A pump that guides the water to each of the contact points, each of the filters is provided with a plurality of plates that allow exhaust gas to pass therethrough in a substantially parallel manner, and the gap between these plates has a width that generates a two-layer flow. A gas cooling and purifying device was used.

According to a sixth aspect of the present invention, there is provided a filter provided in a path for discharging high-temperature exhaust gas to the outside air, wherein a plurality of plates for passing the exhaust gas are provided substantially in parallel, and a gap between these plates is provided. Is the width at which a two-layer flow occurs.

According to a seventh aspect of the present invention, there is provided a filter provided in a path for discharging high-temperature exhaust gas to the outside air, wherein a plurality of plates for passing the exhaust gas are provided substantially in parallel, and a gap between these plates is provided. Is the width at which a two-layer flow occurs, and these plates are made of an elastic material and support the front end in the flow direction of the exhaust gas,
The rear end is a free end, and the interval between the plates fluctuates according to the flow of exhaust gas.

According to the first aspect of the present invention, when this apparatus is applied to an automobile engine, the temperature of the exhaust gas from the engine is 70 to 150 ° C. (the exhaust gas of the gas turbine is 300 to 500 ° C.). Degree C). By bringing this exhaust gas into contact with water in an appropriate chamber, the water vaporizes due to the heat, and the heat of vaporization lowers the temperature of the exhaust gas itself. On the other hand, the gaseous moisture contained in the exhaust gas agglomerates and liquefies due to a decrease in the temperature of the exhaust gas itself. This liquefaction reduces the volume and reduces the pressure. In addition, solid fine particles such as carbon powder in the exhaust gas are decomposed and adsorbed on water, thereby separating the solid fine particles from the exhaust gas. The water used for this was of a circulation type.

Since the moisture in the exhaust gas at 500 ° C. from the engine is about 360 ° C. or more, it is a gaseous substance and has a volume of 22.4 liters or more per gram molecule. When it becomes water droplets, it is reduced to 18 ml. Therefore, it becomes a kind of suction pump in calculation, and discharge of exhaust gas from the engine is facilitated. This reduced pressure is 18/22400, which is approximately 1/1200. Such decompression promotes the intake of the engine, and the engine approaches complete combustion, and does not rise to a temperature higher than necessary, so that generation of carbon monoxide, nitrogen oxides, and the like is extremely suppressed. NOx combines with O ₂ to form nitric acid, which dissolves in water. Then, it functions as an oxidizing agent for converting CO of the next exhaust gas into CO ₂ . The oil component in the exhaust gas becomes dispersed particles and has a function of adsorbing the nitrogen oxides.

According to the second aspect of the present invention, in addition to the above functions, a small amount of a dispersant such as a surfactant and a defoaming agent are added to water to be brought into contact with the exhaust gas, so that solids such as carbon powder in the exhaust gas are added. The fine particles are separated by the dispersing action of the above dispersing agent to form smaller clusters, and the fine particles, other active gas bodies (eg, carbon monoxide, nitrogen oxides, etc.), heavy metals, etc. in the next exhaust gas can be quickly removed. These fine particles and the like are separated from exhaust gas as nuclei to be adsorbed.

According to the third aspect of the present invention, the first aspect of the present invention is provided.
In addition to the functions described in paragraphs 2 and 3, pour water with a small amount of a dispersant such as a surfactant and a defoaming agent added to at least the foremost filter of the plurality of filters. The decomposition of solid particles, adsorption to water, and separation are performed through a filter. The water in the tank is guided to the spout by a pump to circulate the water.

The fourth aspect of the present invention has substantially the same effect as the third aspect of the invention, except that water is brought into contact with the exhaust gas before passing through each filter to cool the exhaust gas. The contacted water becomes water vapor and adheres to each filter, and the exhaust gas comes into contact with the water and quickly adsorbs and separates fine particles, other active gas bodies, heavy metals and the like in the exhaust gas. In addition, the cooling of the exhaust gas and the separation of the solid fine particles are repeated.

According to the fifth aspect of the present invention, the third aspect of the present invention is provided.
The operation of the present invention is substantially the same as that of the invention described in the paragraphs 4 and 5, except that in each filter, the interval between the plurality of plate members is made extremely small, and the exhaust gas is passed between these plate members so that the two-layer flow works. Thereby, a fluidized bed is formed between the highly sticky fixed layers on the surface of each plate body, and the exhaust gas moves in the fluidized bed, but the solid fine particles therein contact the respective fixed layers on both sides. It slows down, falls and is absorbed by the water below. Thereby, the solid fine particles in the exhaust gas are separated from the exhaust gas.

[0018] In the invention according to claim 6, the interval between the plurality of plate members is made extremely small, and exhaust gas is passed between these plate members, whereby the surface of each plate member is formed by the action of the two-layer flow. A fluidized bed is formed between the fixed beds having high adhesiveness, and the exhaust gas moves in the fluidized bed. The solid fine particles in the bed contact the fixed beds on both sides, decelerate, and fall. Thereby, the solid fine particles in the exhaust gas are separated from the exhaust gas. The invention according to claim 7 has the same effect as the invention according to claim 6, but since each plate is formed of an elastic body and only the front end is supported, the flow of exhaust gas is increased. When the distance is strong, the distance between the plates increases, and when the momentum is low, the distance between the plates decreases.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show a schematic configuration of a first embodiment of the present invention, in which exhaust gas from an engine is first sent to a radiator 1.
After the radiator 1, the gas passes through the filter box 2 and is further exhausted through the cyclone 3. The filter box 2 is further divided into two sections 2a,
A pair of filters 4, 4 is provided in each of these sections 2a.

As shown in FIG. 2, each of these filters 4 is formed by winding filaments 4b made of fibers or the like around opposite sides of a frame 4a and providing a small space between the fibers. The filter 4 is provided in the shape of a letter "C" and the outside thereof is filled with a large number of small pieces 5 of ceramic, metal, plastic or the like. A tank 6 is provided below the filter box 2 and communicates with the filter box 2 and the cyclone 3. The tank 6 contains water containing 0.01 to 3% of a substance having a dispersing and emulsifying action such as a surfactant and a very small amount of an antifoaming agent.

A jet port 8 for spraying the water of the tank 6 through a pump 7 is provided on one of the sections 2a of the filter box 2, that is, on the filters 4 and 4 of the section 2a following the radiator 1. I have. A spare tank 9 is connected to the tank 6. Further, an exhaust pipe 10 is led out of the cyclone 3.

In this case, the exhaust gas discharged from the engine has reached about 70 to 160 ° C. However, when this exhaust gas is passed through the radiator 1, the temperature is lowered to 60 to 100 degrees C. This is guided into the filter box 2.
At the same time, the pump 7 is operated to spray water in the tank 6 from the jet port 8 above the filter 4 in one section 2a. As a result, the water gradually hits the small pieces 5 such as ceramics and falls below the filter 4. During this time, the exhaust gas passes between the small pieces 5 and the filter 4, and comes into contact with the water. Therefore, these small pieces 5 are provided to increase the area where the exhaust gas contacts water.

Then, the water that has come into contact with the exhaust gas is vaporized, and the heat of vaporization lowers the temperature of the exhaust gas. In addition, the moisture (vapor) contained in the exhaust gas aggregates and liquefies. Then, the water enters the tank 6 through the lower hole in the filter box 2. Further, when the exhaust gas comes into contact with water, solid fine particles such as carbon powder in the exhaust gas fall apart due to the dispersing action of the dispersant in the water, forming smaller clusters. Then, it quickly adsorbs fine particles, other active gas bodies (for example, carbon monoxide, nitrogen oxides, etc.), heavy metals and the like in the next exhaust gas. Then, the water containing these fine particles enters the tank 6 as described above. Thereby, fine particles and the like are separated from the exhaust gas.

In this way, the gas reaches the cyclone 3 through the two sections 2a, and is discharged from the exhaust pipe 10 of the cyclone 3 to the outside. The exhaust gas in this state is not much different from the outside air temperature, is 38 to 40 ° C. or less even in a hot summer (34 ° C.), and becomes several tens of degrees in a cold winter (5 ° C.). In addition, as described above, the exhaust gas is cooled, and when the gaseous moisture in the exhaust gas becomes water droplets, the volume of the exhaust gas is reduced, and the pressure is reduced by that amount, thereby facilitating discharge of the exhaust gas from the engine. Thus, such a pressure reduction promotes the intake of the engine, and the engine approaches the complete combustion, and does not rise to a temperature higher than necessary. Therefore, the generation of carbon monoxide, nitrogen oxide, and the like is extremely suppressed.

FIGS. 3 to 5 show a second embodiment of the present invention. In this embodiment, a first closed chamber 11 and a second closed chamber 1 are shown.
2, a third closed chamber 13 and a fourth closed chamber 14 are connected in series, and exhaust gas is passed through each of these closed chambers. The first closed chamber 11 is a partition 1
5, one is a passage 18 provided with an introduction pipe 17 for introducing exhaust gas into the water of the lower tank 16, and the other is a ceramic ball, cylinder,
The column chamber 11a is filled with small pieces such as fibers and metal plates.

Similarly to the above-mentioned first closed chamber 11, the second closed chamber 12 and below are divided into two by a baffle plate 15, one of which is an exhaust gas passage 18, and the other is a ceramic sphere, cylinder, fiber, metal or the like. Column chambers 12a and 13 filled with small pieces such as plates
a and 14a. And these first closed chambers 1
Below the first to fourth sealed chambers 14, tank small chambers 16a16b, 16 constituting the tank 16 connected to the respective sealed chambers.
c, 16d, and these tank chambers 16a, 16
b, 16c, 16d are interconnected. An air-cooled or water-cooled cooling pipe 19 passes through each of the passages 18 and the tank 16 of each of the closed chambers 11, 12, 13, and 14.

The exhaust passage 2 is located behind the fourth closed chamber 14.
0 is provided to exhaust gas to the outside. The tank 16 is provided with a liquid level controller 22 having an auxiliary tank 21. Further, a water injection port 2 is provided above each of the column chambers 12a and 13a of the second closed chamber 12 and the third closed chamber 13.
3 are provided, and water is supplied from the tank 16 to the respective water outlets 23 by a pump 24.

In the case of this embodiment, the tank 16 is previously filled with water to which 0.005 to 3% of a surfactant has been added. The exhaust gas from the engine is exhausted from the introduction pipe 17 into the water in the tank 16 of the first closed chamber 11. Since the exhaust gas is exhausted at a high temperature and a high pressure as described above, the exhaust gas is cooled in the liquid to dissolve the soluble matter. At this time, bubbles containing the surfactant become millet, and the column chamber 11
a, and the tank 16a below the column chamber 11a
fall into. At the same time, the insoluble gas that has entered the water in the tank 16a becomes millet and is sent to the column chamber 12a through the passage 18 in the next second sealed chamber 12. At this time, not only millet but also a large amount of steam is generated, but the water discharged from the water injection port 23 adheres to the inside of the column chamber 12a, and the steam comes into contact with the water and is cooled, so that the temperature drops rapidly. I do. In addition, solid fine particles and harmful gases are adsorbed and separated in the water in the same manner as described above. In this manner, the exhaust gas is also cooled in the third closed chamber 13 as in the second closed chamber 12, and
In addition, fixed fine particles and harmful gases are separated.

The temperature of the exhaust gas in each of the column chambers 11, 12, 13, and 14 is as shown in FIG. 4, and the contents of carbon monoxide and nitrogen oxide at that time are as shown in FIG. In this way, the volume of the exhaust gas suddenly decreases due to the rapid temperature decrease of the exhaust gas, and the pressure of the exhaust gas is reduced. This becomes a force for sucking the exhaust gas from the engine, and the combustion efficiency in the engine becomes very good. As a result, engine combustion does not increase in temperature, and NOx
The amount of generation decreases. In addition, fine particles in the exhaust gas are dispersed in the water, and this causes the carbon monoxide and NOx in the subsequent exhaust gas to be dispersed.
And separate it from the exhaust gas. Therefore, the exhaust passage 2
The temperature of the exhaust gas coming out from 0 does not greatly differ from the outside air temperature and comes out in a clean state.

FIGS. 6 to 9 show a third embodiment of the present invention. The third embodiment is substantially the same as the first and second embodiments, except for the configuration of the filter. That is, also in this embodiment, the exhaust gas from the engine is guided by the guide plate 27 from the introduction pipe 26 at one end of the box-shaped main body 25 and enters the tank 28 formed at the lower part of the box-shaped main body 25. The tank 28 is filled with water to which 0.005 to 3% of a surfactant is added in advance. The tank 28 communicates with each filter 30 through an appropriate hole. The exhaust gas that has entered the liquid in the tank 28 is rapidly cooled, becomes a millet, and passes through the passage 29.
Get out. Then, the air is discharged to the outside from the other exhaust pipe 31 through a plurality of filters 30 provided in the box-shaped main body 25 at intervals.

As shown in FIG. 7, the structure of these filters 30 is such that a large number of thin plates 30a parallel to the flow of exhaust gas are arranged at intervals, the interval between these adjacent thin plates 30a is made extremely small, and two layers are formed. The interval at which the flow occurs. When the exhaust gas flows between the thin plates 30a, as shown in FIG. 8, a fixed layer 32 is formed along the surface of each thin plate 30a in the flow of the exhaust gas, and a fluidized layer 33 is formed therebetween. Therefore, the fixed layer 32 has a high adhesiveness and the fluidized bed 33
The solid fine particles in the interior strike these fixed layers 32 and are decelerated.

As a result, when the exhaust gas passes through each filter 30, some of the solid fine particles in the exhaust gas
2, the vehicle decelerates and falls downward as shown in FIG. Then, the solid particulates in the exhaust gas fall into the liquid tank 28 as they pass through the filters 30 sequentially, are separated from the exhaust gas, and the exhaust gas coming out of the exhaust pipe 31 is the above-described embodiment. Similarly, the temperature is lowered and the exhaust gas is clean.

FIGS. 10 and 11 show a fourth embodiment of the present invention. The fourth embodiment is similar to the third embodiment.
In this embodiment, the exhaust gas from the engine is supplied from the introduction pipe 35 at one end of the box-shaped main body 34 to the first position.
The closed chamber 36, the second closed chamber 37, the third closed chamber 38, and the fourth
The exhaust pipe 4 reaches the closed chamber 39 and passes through the baffle chamber 40.
Exhaust from 1 to the outside. Below each of these closed chambers, there is provided a tank 42 containing water to which 0.005 to 3% of a surfactant has been added in advance, and this tank 42 is connected to each of the closed chambers 36 to 39 through appropriate holes. Have been. Each of the closed chambers 36 to 39 is provided with a nozzle 43a to which water is sprayed.
, And a filter section 44. As shown in FIG. 11, each of these filter sections 44 has a large number of curved thin plate-like filter plates 44.
a are arranged in parallel, and the interval between the filter plates 44a is narrowed so that the two-layer flow phenomenon occurs as in the case of the third embodiment. The exhaust gas entering the spray section 43 of each closed chamber is cooled by contacting the water sprayed by each nozzle 42, and further separates solid particulates such as carbon powder and harmful gas in the exhaust gas by each filter section 44. Configuration.

More specifically, the water in contact with the exhaust gas is vaporized as in the above embodiment, and the heat of vaporization lowers the temperature of the exhaust gas, while the water (vapor) in the exhaust gas is reduced. Agglomerates and liquefies. Then, the liquefied water falls into the lower tank 42 and enters. Further, when the exhaust gas comes into contact with water, solid fine particles such as carbon powder and harmful gas in the exhaust gas are separated by the dispersing action of the dispersant in the water and become smaller clusters. Then, it quickly adsorbs fine particles, other active gas bodies (for example, carbon monoxide, nitrogen oxides, etc.), heavy metals and the like in the next exhaust gas. Further, the exhaust gas enters the filter section 44, passes between the filter plates 44a, and the solid fine particles are stalled by the two-layer flow phenomenon, fall into the lower tank 42, and are separated from the exhaust gas.

As described above, the exhaust gas is sequentially cooled from the first closed chamber 36 to the fourth closed chamber 39 and gradually cooled to a temperature substantially equal to the outside air temperature. Are separated and removed, and are exhausted to the outside from the exhaust pipe 41 through the baffle plate chamber 40.

Next, FIGS. 12 and 13 show another embodiment of the filter for generating a two-layer flow of the filter 30 and the filter section 44 in the third and fourth embodiments. The filter 45 in FIG. 12 includes a plurality of bi-folded elastic plates 45a that are substantially parallel to the direction in which the exhaust gas flows, and each filter 45 has its folded end supported by a support shaft 46, and when the flow of the exhaust gas is fast, Each filter 45
The elastic plates 45a on both sides of the two folds become narrower with each other, so that the interval between the adjacent filters 45 increases. When the flow is slow, the elastic plates 45a on both sides of the two folds of each filter 45 are separated from each other, so that the interval between the adjacent filters 45 is not widened. Further, as shown in FIG. 13, the elastic plate 45a of each filter 45 is provided.
May be provided with a number of projections or small holes 45b. This is a configuration in which a large number of projections or small holes are provided on the side surface of the filter plate that generates a two-layer flow of the filter 30 and the filter section 44 in the third and fourth embodiments to more reliably separate solid fine particles. It is what it was.

In the above embodiment, the water in the tank provided below each filter is pumped up by a pump and jetted from above each filter. However, these pumps may use the power of a motor or the like. As shown in FIG. 14, a propeller 48 is rotatably provided in an exhaust gas passage 47,
The propeller 48 may be rotated by the pressure of the exhaust gas, and the rotation may be transmitted to the pump 49 to rotate the pump 49. Further, when water is first brought into contact with the exhaust gas, an orifice valve 51 is provided in the exhaust gas passage 50 as shown in FIG.
A water pipe 5 from the tank is provided at the 51 orifice valve.
By providing two tip openings, water can be sprayed into the passage 50 by the orifice valve 51.

In each of the above embodiments, 0.005 to 3% of a surfactant and a very small amount of an antifoaming agent are added to water with which exhaust gas is brought into contact. is not. If water is brought into contact with the exhaust gas without adding any of these, some of the NOx will combine with O ₂ to become nitrous acid or nitric acid, dissolve in the water, and turn the next exhaust gas CO into CO ₂ . Works as an oxidizing agent. The oil component in the exhaust gas becomes dispersed particles and has a function of adsorbing the nitrogen oxides.

Although the present invention has been described with reference to the exhaust gas of an automobile engine in the above embodiment, the high-pressure combustion exhaust gas of the present invention may be a diesel engine, a gasoline engine, or the like.
Exhaust gas from a two-cycle engine, aircraft exhaust gas such as a helicopter, ship engine exhaust gas, gas turbine exhaust gas, generator engine exhaust gas, combustion exhaust gas from boilers in factories, restaurants and households Kitchen exhaust gas. Therefore, the present invention is applicable to these exhaust gases.

[0040]

According to the first aspect of the present invention, by contacting hot combustion exhaust gas with water in an appropriate chamber, the heat vaporizes the water, and the heat of vaporization lowers the temperature of the exhaust gas itself. Go down. By this principle, the exhaust gas can be cooled to a temperature close to the outside air temperature. Therefore, conventionally, these high-temperature combustion exhaust gases are directly discharged to the outside air, so that global warming is progressing. However, this can be prevented by the treatment of the present invention. Moreover, the cooling of these exhaust gases makes it difficult to detect far-infrared rays from the exhaust port, and can protect them from targets and the like.

Further, by contacting with water as described above, solid fine particles such as carbon powder and harmful gas in the exhaust gas are decomposed and adsorbed on the water, thereby separating the solid fine particles and the harmful gas from the exhaust gas. be able to.
Further, by contact with water as described above, the gaseous moisture in the exhaust gas aggregates and liquefies due to a decrease in the temperature of the exhaust gas itself. This liquefaction reduces the volume and reduces the pressure. Such reduced pressure promotes the intake of the combustion, and the combustion approaches the complete combustion, and does not rise to a temperature higher than necessary. Therefore, the generation of carbon monoxide, nitrogen oxide, and the like is extremely suppressed. Therefore, the exhaust gas can be released to the outside air in a clean state.

According to the second aspect of the present invention, in addition to the effects of the first aspect, a small amount of a dispersant such as a surfactant and a defoaming agent are added to water to be brought into contact with the exhaust gas, thereby reducing carbon in the exhaust gas. Adsorption and separation of solid fine particles such as powders and harmful gases can be made more reliable.

According to a third aspect of the present invention, in addition to the effects of the first and second aspects, a water containing a small amount of a dispersant such as a surfactant and an antifoaming agent added to at least the foremost filter of the plurality of filters. Water is attached to the filter to increase the contact area of the exhaust gas with water, ensuring the cooling of the exhaust gas, decomposing solid particulates and harmful gases in the exhaust gas, and adsorbing to water , Ensuring separation through filters. The fourth aspect of the invention has substantially the same effect as the third aspect of the invention, but further cools the exhaust gas by contacting water with the exhaust gas before passing through each filter, and contacts the exhaust gas. Water becomes water vapor and adheres to each filter, and the exhaust gas comes into contact with the water and quickly adsorbs fine particles, other active gas bodies, heavy metals, and the like in the exhaust gas. By repeating these steps several times, the temperature is gradually lowered and solid fine particles and the like are separated. Therefore, when the air is exhausted to the outside air, the temperature becomes almost the same as the outside air temperature, and solid fine particles such as carbon hardly exist.

According to the fifth aspect of the present invention, the third aspect of the present invention is provided.
In addition to the effects of the inventions of the items and 4, the configuration of each filter is a very simple structure in which a number of thin plates are arranged,
There is almost no clogging, and solid fine particles can be reliably separated.

Further, according to the inventions of claims 6 and 7, each filter has a very simple structure in which a large number of thin plates are arranged, and there is almost no clogging and solid fine particles can be reliably obtained. Can be separated. Further, according to the invention of claim 7, the interval between the respective plates changes in accordance with the momentum of the flow of the exhaust gas, so that the flow of the exhaust gas can be smoothly passed without stopping at the position, and Can be more reliably separated from the exhaust gas.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram showing a filter according to the first embodiment of the present invention.

FIG. 3 is a schematic configuration diagram according to a second embodiment of the present invention.

FIG. 4 is a graph showing the temperature of exhaust gas in each column chamber in a second embodiment of the present invention.

FIG. 5 is a graph showing the content of nitrogen oxides and the like contained in exhaust gas in each column chamber in the second embodiment of the present invention.

FIG. 6 is a schematic configuration diagram according to a third embodiment of the present invention.

FIG. 7 is an explanatory perspective view of a filter according to a third embodiment of the present invention.

FIG. 8 is a diagram illustrating the principle of a filter according to a third embodiment of the present invention.

FIG. 9 is an explanatory schematic diagram showing a flow of exhaust gas in a third embodiment of the present invention.

FIG. 10 is a schematic configuration diagram in a fourth embodiment of the present invention.

FIG. 11 shows a first embodiment of the fourth embodiment of the present invention.
It is a schematic structure sectional view of a closed room.

FIG. 12 is a perspective view showing another example of the filter according to the third and fourth embodiments of the present invention.

FIG. 13 is a perspective view showing still another example of the filter according to the third and fourth embodiments of the present invention.

FIG. 14 is a schematic explanatory view showing an example of a drive source of the pump of the present invention.

FIG. 15 is a schematic explanatory view showing another example of spraying water into the exhaust gas passage of the present invention.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 radiator 2 filter box 3 cyclone 4 filter 5 small piece 6 tank 7 pump 8 jet port 10 exhaust pipe 11 first closed chamber 12 second closed chamber 13 third closed chamber 14 fourth closed chamber 11a column chamber 12a column chamber 13a column Chamber 14a Column chamber 15 Partition wall 16 Tank 17 Introducing pipe 18 Passage 19 Cooling pipe 20 Exhaust passage 23 Water outlet 24 Pump 25 Box-shaped main body 26 Introducing pipe 27 Guide plate 28 Tank 29 Passage 30 Filter 30a Thin plate 31 Exhaust pipe 32 Fixed layer 33 Fluidized bed 34 Box-shaped main body 35 Introducing pipe 36 First sealed chamber 37 Second sealed chamber 38 Third sealed chamber 39 Fourth sealed chamber 40 Baffle plate chamber 41 Exhaust pipe 42 Tank 43 Spray section 43a Nozzle 44 Filter section 45 Filter 45a Elastic plate Body 4 b projections or small hole 46 support shaft 47 propeller 48 passage 49 orifice valve 50 pipe

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI F01N 3/02 B01D 53/34 135A 301 3/04 (58) Investigated field (Int.Cl. ⁶ , DB name) B01D 53 / 34 B01D 53/62 B01D 53/77

Claims (7)

(57) [Claims] In a path for discharging high-temperature exhaust gas to the outside air, the exhaust gas is brought into contact with water for circulating use in an appropriately closed chamber, and the heat evaporates the water. By lowering the temperature of the exhaust gas, the exhaust gas is cooled, and solid particulates such as carbon powder in the exhaust gas and harmful gases such as carbon monoxide are decomposed and adsorbed. Cooling and purification methods. 2. In a path for discharging high-temperature exhaust gas to the outside air, the exhaust gas is brought into contact with circulating water to which a small amount of a dispersant such as a surfactant and a defoaming agent have been added in a suitable closed chamber. The heat evaporates the water, and the heat of vaporization lowers the temperature of the exhaust gas, thereby cooling the exhaust gas and removing solid particulates such as carbon powder and harmful gas such as carbon monoxide in the exhaust gas. Disassembly,
A method for cooling and purifying combustion exhaust gas, which is characterized in that it is adsorbed. 3. A plurality of filters are connected in an appropriate closed chamber in a path for discharging high-temperature exhaust gas to the outside air, and the exhaust gas is passed through each of these filters. Circulating water to which a small amount of a dispersing agent such as a dispersant and an antifoaming agent is added, and the exhaust gas passing through the filter is brought into contact with the water, and the heat evaporates the water. By lowering the temperature, the exhaust gas is cooled, and solid particulates such as carbon powder and the like in the exhaust gas and harmful gas such as carbon monoxide are decomposed and adsorbed to the water. Cooling and purification methods. 4. A plurality of filters are connected in an appropriate closed chamber in a path for discharging high-temperature exhaust gas to the outside air, exhaust gas is passed through each of these filters, and exhaust gas is passed through each of these filters. Before passing through, circulating water to which a small amount of a dispersant such as a surfactant and a defoaming agent is added is brought into contact with the exhaust gas, and the heat vaporizes the water, and the heat of vaporization lowers the temperature of the exhaust gas. While cooling the exhaust gas, each filter decomposes solid particulates such as carbon powder and the like in the exhaust gas and harmful gases such as carbon monoxide, adsorbs the above water, and repeats the cooling and separating steps. A method for cooling and purifying combustion exhaust gas, characterized in that: 5. A route for discharging high-temperature exhaust gas to the outside air, in which a plurality of filters are connected in an appropriate closed chamber, and at least before being introduced into the foremost filter, a dispersant such as a surfactant is added. The exhaust gas is passed or contacted with water to which a small amount of an antifoaming agent has been added, and a tank is provided so that the water surface of the water is located below each of the filters. A plurality of plates for passing the exhaust gas therebetween are provided substantially in parallel, and the gap between these plates is set to a width at which a two-layer flow is generated. Cooling and purification equipment. 6. A filter provided in a path for discharging high-temperature exhaust gas to the outside air, wherein a plurality of plate members for passing the exhaust gas therebetween are provided substantially in parallel, and a gap between these plate members is formed so that a two-layer flow is generated. A filter, characterized in that: 7. A filter provided in a path for discharging high-temperature exhaust gas to the outside air, wherein a plurality of plates for passing the exhaust gas therebetween are provided substantially in parallel, and the gap between these plates is a width at which a two-layer flow is generated. These plates are made of an elastic body, support the front end in the flow direction of the exhaust gas, make the rear end a free end, and have a configuration in which the interval between the respective plates fluctuates due to the momentum of the flow of the exhaust gas. A filter, characterized in that: