KR100373112B1 - wet type purification system for automobile exhaust gas - Google Patents

Abstract

In the vehicle exhaust gas wet purifying apparatus using wet cleaning to prevent pollution, it is possible to collect and purify the harmful components contained in the vehicle exhaust gas discharged from the internal combustion engine as steam of the washing water.

A venturi tube (3) installed on the upstream exhaust pipe (31) to atomize the washing water, and a water separator (7) provided on the downstream exhaust pipe (31a) so as to separate the water in the exhaust gas by centrifugal separation force; A centrifugal separator 8 installed inside the separator 7, an electric motor 33 connected to the centrifugal separator 8, and a plurality of discharge nozzles 9 circumferentially formed in the centrifugal separator 8. ), A porous filtration filter 50 inserted into the plurality of discharge nozzles 9 so that water vapor in the exhaust gas condenses, and a purifying filter 14 connected to the settling tank 12, and a filter 14 ) And a water discharge purifying apparatus for automobile exhaust gas comprising a circulation pump 16 connecting the water tank 1 to the hose 15.

By continuously circulating a certain amount of water to purify the exhaust gas, there is an industrial use effect, which is essential for environmentally friendly automotive wet purifiers, especially for large diesel diesel vehicles and trains.

Description

Wet type purification system for automobile exhaust gas}

The present invention relates to a wet exhaust gas purification device for cars using wet cleaning to prevent pollution, and to collect and purify the harmful components contained in the car exhaust gas discharged from the internal combustion engine.

In the conventional pollution prevention technology of automobile internal combustion engines, nitrogen compounds (NOx) and sulfurous acid are reduced to the extent that the internal combustion engine performance is improved in the pretreatment process and relies on complete combustion, or the harmful component is reduced by the catalytic device in the post-treatment process. Catalytic equipment, which is a conventional technology for purifying exhaust gas of large diesel vehicles that emits soot, which is excessive particulate matter, is discharged to the atmosphere without purifying gas (SOx). There is a limitation in the purification performance, and the plasma type exhaust post-treatment apparatus that incinerates exhaust gas at a high temperature currently being developed will have side effects of dioxin generation and driver safety problems due to high temperature heating elements due to high temperature incineration.

The present invention is to improve the conventional problems as described above, by treating the exhaust gas of the vehicle with the cleaning water of the wet method to discharge only the purified exhaust gas to the atmosphere to prevent air pollution. The means and method for removing water is a proven technology for effectively recovering the oil in the fast flowing air after the bearing oil of the aircraft jet engine is mixed into the air, and the oil recovery technology in the air using centrifugal force and porous filtration filter Is applied to the automotive wet purifying apparatus according to the present invention to enhance the ability to separate the moisture contained in the exhaust gas to improve the fit for large diesel diesel vehicles. In addition, the porous filtration filter is a tight mesh type As a material, the centrifugal force load and heat of 16, 000 rpm, the rotational speed of the aircraft engine , Chemical durability may be used in automotive wet type scrubber according to the present invention is excellent without difficulty.

In order to achieve the above object, the present invention provides a wet exhaust gas purifying apparatus for an automobile exhaust gas in which only the exhaust gas purified by treating the soot gas of an automobile with a wet method is discharged to the atmosphere to prevent air pollution. A venturi tube (3) installed on the upstream exhaust pipe (31) to atomize the washing water, a tub (1) connected to the venturi tube (3) through a pipe provided with a check valve (2), and centrifugal force In order to separate the water from the exhaust gas, a water separator 7 provided on the upstream exhaust pipe 31, a centrifugal separator 8 installed inside the water separator 7, and a centrifugal separator 8 are provided with a rotating shaft ( The electric motor 33 connected by 33a), the plurality of discharge nozzles 9 formed in the circumferential shape in the centrifugal separator 8, and the inside of the plurality of discharge nozzles 9 so that water vapor in the exhaust gas is recovered. Separation of the porous filtration filter 50 inserted into the water and water A cylindrical filtration filter 50a circumferentially inserted into the wall 7a of (7), a water trap 6 and a heat dissipation fin 10 installed on the downstream exhaust pipe 31a, and a downstream exhaust pipe ( A settling tank 12 installed on 31a) to recover the treated water in the liquid phase, a purifying filter 14 connected to the lower part of the settling tank 12 by a hose 15, and a filter 14 and a water tank 1 The vehicle exhaust gas wet purifier comprising a circulation pump 16 connected by a hose 15 is configured.

1 is an overall configuration diagram of a purification apparatus according to the present invention

2 is a structural view of the operation of the water separator according to the present invention

3 is a cross-sectional view of a water separator according to the present invention.

* Explanation of symbols on the main parts of the drawing

1: washing water container 3: venturi tube

7 water separator 8: centrifugal separator 12: sedimentation tank 14: purification filter 16: circulation pump 50: porous filtration filter

The present invention configured as described above will be described in more detail with reference to the accompanying drawings, which are illustrated by way of example. In the wet exhaust gas purifying apparatus for automobiles, in which only the exhaust gas is purified to be discharged to the atmosphere to prevent air pollution, the venturi tube 3 installed on the upstream exhaust pipe 31 to atomize the washing water and the venturi tube A water bottle 1 connected through a pipe provided with a check valve 2 in (3), and a water separator 7 provided on the upstream exhaust pipe 31 so as to separate water from the exhaust gas by centrifugal separation force, A centrifugal separator (8) installed inside the water separator (7), an electric motor (33) connected to the centrifugal separator (8) by a rotary shaft (33a), and a centrifugal separator (8) formed in a columnar shape. Multiple discharge nozzles (9 And a porous filtration filter 50 inserted into the plurality of discharge nozzles 9 so as to recover water vapor in the exhaust gas, and circumferentially inserted into the walls 7a of the water separator 7. A cylindrical filtration filter 50a, a water trap 6 and a heat dissipation fin 10 provided on the downstream exhaust pipe 31a, and a sedimentation tank 12 installed on the downstream exhaust pipe 31a to recover the treated water in the liquid phase. ), The lower part of the settling tank 12 and the purification filter 14 connected by the hose 15, and the circulation pump 16 which connected the filter 14 and the water tank 1 with the hose 15, and Automotive exhaust gas wet purifier; and an external air supply pump 20 and check valve 22 installed through the air supply pipe 21 on the downstream exhaust pipe 31a to cool the water vapor in the exhaust gas to improve recovery efficiency. Vehicle exhaust gas wet purification device comprising a.

When the automobile internal combustion engine is operated, a high temperature exhaust gas flows through the upstream exhaust pipe 31, and a negative pressure is generated in the venturi pipe 3 so that the washing water flows from the water tank 1 to be atomized inside the upstream exhaust pipe 31. Hazardous gas components contained in the exhaust gas are collected by the particles of steam of the washing water mixed with the high temperature exhaust gas and vaporized.

Since the exhaust gas from the engine (not shown) is discharged from the upstream exhaust pipe 31 to the surface of the downstream exhaust pipe 31a located after the point of the conventional catalytic purification apparatus 30, the heat radiation fin 10 is attached to the outside air flow. The temperature of the washing water is reduced by the natural cooling method and the harmful gas is reduced to the liquid phase, and the outside air is supplied to the inside of the air supply pipe by using the air supply device 20 to supply the downstream exhaust pipe 31a. The internal temperature of the reactor is further reduced, and a part of the mixed steam impinges on the water trap 6 so that a part of the washing water vapor falls into the settling tank 12.

Therefore, the exhaust gas and the steam of the washing water whose temperature is reduced are converted into a state where the density is high, so that the moisture in the exhaust gas is easily separated by centrifugal force.

A washing water check valve 2 and an air check valve 22 are respectively installed in the washing water supply pipe and the air supply pipe to prevent backflow.

As shown in FIG. 2 of the operation structure of the water separator according to the present invention, the mixed vapor of the exhaust gas and the washing water is a water trap (6) and the heat radiation fin (10) after the conventional catalytic purifier (30) Cooling through the added downstream exhaust pipe 31a, the moisture in the exhaust gas is converted into a state of relatively low temperature and easy to congeal. As the negative pressure is formed in the plurality of discharge nozzles 9 of the rotating centrifugal separator 8, the exhaust gas containing water vapor passes through the interior of the plurality of discharge nozzles 9 by the suction action. As described above, a porous filtration filter 50 is installed in the internal passages of the plurality of discharge nozzles 9 through which the discharge gas passes, and the plurality of discharge nozzles 9 of the centrifugal separator 8 are driven by the electric motor 33. As it is rotating at a high speed, the moisture in the exhaust gas collides with the tight filtering network and then gradually increases in density. As shown by the solid arrow by the centrifugal separation force, the inner surface of the wall 7a of the water separator 7 is concentrated. After colliding, the liquid is dropped into the settling tank 12 through the collecting pipe 11, and the exhaust gas having a low density is not affected by the centrifugal force and is blown by the centrifugal separator 8 as indicated by the dotted arrows. The drying was removal of water through the tail pipe 32 located in the exhaust pipe (31a), purifying the exhaust gas is discharged to the atmosphere.

When explaining the structure and operation principle of the present invention in more detail, the cross-sectional view of the water separator according to the present invention, as shown in Figure 3, a plurality of discharge nozzles circumferentially installed inside the centrifugal separator (8) (9) The inside of the) is a porous filtration filter 50 that withstands centrifugal force and is thermally and chemically durable, and a cylindrical filtration filter 50a that is circumferentially inserted into the wall 7a of the water separator 7, and is exhausted. The mixed gas of the gas and the washing water is filtered by the porous filtration filter 50 in the process of passing through the plurality of discharge nozzles 9 installed circumferentially in the centrifugal separator 8 which is rotating at a high speed by the electric motor 33. And agglomerate to increase the density, and the centrifugal force acts harder to impinge again on the cylindrical filtration filter 50a circumferentially inserted into the wall 7a of the water separator 7. It has a synergistic effect in that water is recovered from the exhaust gas while rotating around the cylindrical filtration filter 50a having a vortex flow form, and the exhaust gas from which the moisture is removed becomes less dense so that the centrifugal force is not affected. And the purged exhaust gas dried by the blowing action of the centrifugal separator 8 can be discharged to the atmosphere through the tail pipe 32.

The water of the washing water having a higher density than the exhaust gas component collides with the outer wall 7a of the water separator 7 to be reduced to a liquid phase and falls into the settling tank 12 through the recovery pipe 11 and is purified and dried. Only exhaust gases are emitted to the atmosphere.

Then, the water vapor collided with the centrifugal force on the outer wall 7a of the water separator 7 in which the centrifugal separator 8 is installed and collected contaminant fine particles is converted into a liquid phase and dropped into the settling tank 12 by ordinary gravity. And the contaminant particles collected in the sedimentation tank 12 are purged of harmful components of the exhaust gas while passing through the purification filter 14 through the hose 15 by the suction force of the circulation pump 16. In addition, only the purified water is recovered to the water tank (1) to provide a wet purification apparatus that can purify the exhaust gas of the vehicle using a certain amount of water.

Therefore, a small amount of washing water discharged into the atmosphere together with the exhaust gas to the outside of the tail pipe 32 is to be replenished regularly and to replace and maintain the purification filter 14 regularly. As described above, the upstream exhaust pipe 31 and Provided is an automotive exhaust gas wet purifying apparatus comprising a method of collecting particulates and harmful components of exhaust gas by atomizing water in an upstream exhaust pipe 31 and using particles of water vapor.

In another embodiment of the present invention, the venturi nozzle 3 is replaced by a pressure injection pump (not shown) and a spray nozzle (not shown) to atomize the washing water of the water bottle 1 inside the upstream exhaust pipe 31. It is possible to provide an automotive wet purification device that can be used.

As described above, the present invention collects harmful components by using a certain amount of washing water, which is a wet method, to discharge the exhaust gas to the atmosphere, thereby preventing air pollution. It is possible to provide an environmentally friendly vehicle wet purifier that purifies harmful components including particulate matter in exhaust gas while continuously circulating. In particular, due to the limitations of the performance of the conventional catalytic purification device, it is essential for large diesel diesel vehicles and trains that have to discharge particulate soot, which is a particulate matter.

Claims (2)

An atomizing device 3 installed on the upstream exhaust pipe 31 to atomize the washing water, a water bottle 1 connected to the atomizing device 3 to supply the washing water, and an upstream exhaust pipe to recover the washing water. A water separator (7) having a cylindrical filtration filter (50a) mounted on (31) and inserted in a columnar shape, and a plurality of discharge nozzles (9) installed in the water separator (7) and formed in a columnar shape; And a centrifugal separator (8) having a porous filtration filter (50), an electric motor (33) connected to the centrifugal separator (8) to rotate, and cooling condensation to increase the recovery efficiency of the washing water in the exhaust gas. A water trap 6, a heat dissipation fin 10, and an air supply device 20 respectively installed on the downstream exhaust pipe 31a, and a settling tank 12 installed on the downstream exhaust pipe 31a to reuse the recovered washing water; The purification filter 14 connected below the settling tank 12, and the connection between the purification filter 14 and the water tank 1 Keen vehicle exhaust gas scrubbing apparatus comprises a circulation pump 16. 2. The wet exhaust gas purification apparatus for automobiles according to claim 1, wherein the particulate matter and harmful components of the exhaust gas are purified using particles of water vapor.