JPH09170426A - Emission control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress violent stirring phenomenon of water in a liquid storage part generated due to gas pressure of exhaust gas or liquid catalyst, reduce gas pressure, and improve air and water separation action. SOLUTION: An exhaust gas purifier is provided with a buffer blade body 9 which can suppress stirring stream of water generated in accordance with the introduction of exhaust gas into a liquid storage part 4 or liquid catalyst.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas purifying apparatus for use in internal combustion engines such as automobiles, ships, construction machinery, diesel engines such as generators, refuse incinerators, boilers and other combustion devices. is there.

[0002]

2. Description of the Related Art Today, air pollution caused by exhaust gas causes a serious pollution problem due to a drastic increase in the number of automobiles, boilers, construction machines, generators and the like. In this exhaust gas, carbon monoxide (CO), nitrogen oxides (N
O _X), hydrocarbons (HC), toxic pollutants such as lead (Pb), because contains hazardous particles.

Conventionally, as means for removing and reducing these harmful components, for example, JP-A-60-47841,
By means for adjusting supply air and fuel injection amount as in JP-A-62-267519, and by an exhaust gas recirculation device generally called EGR as a measure for preventing black smoke as in JP-A-63-94036. Or JP-A-63
Various proposals have been made such as improving the structure of the internal combustion chamber of an engine, such as No. 117119.

Further, in view of the above conventional apparatus, the applicant of the present invention
An exhaust gas purifying device shown in Japanese Patent Application No. 4-90864 is proposed.

In brief, this structure forms a liquid storage portion containing water or a liquid catalyst in the exhaust body, and introduces the exhaust gas into the liquid storage portion to transfer the exhaust gas to the water or liquid catalyst. To remove or reduce harmful components in the exhaust gas and pass through a labyrinthine passage to separate the water or liquid catalyst and the gas and exhaust the gas through the exhaust unit.

[0006]

However, in the above proposed structure, when the exhaust gas is introduced into the liquid storage part, the water or liquid catalyst in the liquid storage part is violently disturbed by the gas pressure of the exhaust gas, and the water or liquid catalyst is dissolved. Are scattered to the surroundings in the liquid storage part, the water-liquid separation action is reduced, and the amount of water or liquid catalyst exhausted with exhaust gas to the outside is increased, and due to evaporation, it is used continuously for a long time. In that case, there is an inconvenience that there is a practical inconvenience.

[0007]

SUMMARY OF THE INVENTION The present invention is intended to solve such an inconvenience, and in the present invention, the invention according to claim 1 provides a water or liquid catalyst in the exhaust body. A liquid storage part is formed, and exhaust gas exhausted from the engine is introduced into the liquid storage part through an exhaust pipe, and the exhaust gas is brought into contact with water or a liquid catalyst in the liquid storage part so that the exhaust gas In the exhaust gas purifying apparatus, which removes or reduces harmful components and passes through the labyrinth-like passage of the air-water separator to separate water or liquid catalyst and gas and exhausts them through the exhaust unit, An exhaust gas purifying apparatus is characterized in that a buffer blade body capable of suppressing a disturbing flow of water or a liquid catalyst due to introduction of exhaust gas is arranged in a liquid storage section.

According to a second aspect of the present invention, the buffer blade body of the first aspect is characterized in that a plurality of twisted blade plates are radially arranged. or,
The invention according to claim 3 is characterized in that a plurality of baffles capable of folding back the flow of exhaust gas are arranged in the labyrinth-like passage of the water-water separator according to claim 1 or 2. To do.

[0009]

1 to 5 show an example of an embodiment in which the present invention is applied to a muffler of an automobile, 1 is an exhaust body, which is connected to an exhaust pipe 3 of an automobile 2. .

The inside of the exhaust body 1 is divided into a liquid storage portion 4 and a water / water separation portion 5 by a partition plate 5b, and a drain plate 8 is formed at a lower portion of the liquid storage portion 4 by a receiving plate 7 having a communication hole 7a. The drain port 8 is formed and can be opened and closed on the bottom wall of the drain part 8.
a is provided, a buffer vane body 9 is fixedly installed in the upper portion of the liquid storage unit 4, and an inlet pipe 3a connected to the exhaust pipe 3 is inserted in the liquid storage unit 4 and the water is stored in the liquid storage unit 4. Alternatively, the liquid catalyst L is filled up to the liquid level L ₁ .

Further, the air / water separator 5 is divided into a plurality of, in this case, six compartments R by partition walls 5a, and a labyrinth-like passage 6 which allows the exhaust gas G to sequentially pass through each compartment R. Is formed, and the compartment R at the top is communicated with the liquid storage part 4 by the communication passage 10, and the compartment R at the bottom is communicated with the exhaust part 13 by the communication passage 12 having the mesh portion 11. .

In this case, the buffer blade body 9 is formed by radially disposing a plurality of twisted blade plates 14, and two buffer blade bodies 9 are fixedly arranged in parallel on the receiving plate 7. In this case, the passage opening 15a is formed by the four twisted blade plates 15 protruding from the wall surface between the two buffer blade bodies 9.

Further, in this case, the baffle 16 capable of returning the flow of the exhaust gas G to the labyrinth-like passage 6 of the air / water separator 5 is provided.
A plurality of baffles 16 are formed, and the baffle 16 is formed in a mushroom-shaped cap shape, and the baffle 16 is erected on the partition wall 5a by a plurality of leg pieces 16a, so that the exhaust gas G rising from below interferes. After colliding with the body 13, it is folded back and then rises.

As the water or liquid catalyst L, various ones are selected and used. For example, water,
Antifreeze, or as the main component substance, potassium carbonate,
Examples of the catalyst include a compound made of a compound such as aluminum oxide, manganese dioxide, boric acid and nickel chloride, and industrial waste liquid containing aluminum hydroxide, iron hydroxide, magnesium hydroxide, slaked lime and urea can also be used.

Reference numeral 17 denotes a replenishment section. In this case, a replenishment main body 18 is arranged in the middle of the exhaust pipe 3 so as to communicate therewith, and a suction pipe 19 having a lower end obliquely cut is fixed in the replenishment main body 18.
A replenishment tank 20 is arranged above the replenishment main body 18, and the replenishment tank 20 and the inside of the replenishment main body 18 are connected and connected by a connection pipe 21, and a manual switching type on-off valve 22 is provided in the middle of the connection pipe 21.
And the electromagnetic on-off valve 23 and the backflow prevention valve 24 are connected, and the electromagnetic on-off valve 23 is connected to the liquid level L ₁ of the water or liquid catalyst L in the exhaust main body ₁ and the liquid level L ₂ of the water or liquid catalyst L in the replenishing main body 18. Is electrically connected to the liquid level sensors S ₁ and S ₂ for detecting
The electromagnetic on-off valve 23 is provided so as to open when the liquid level L ₁ or L ₂ is below the set level, and during the opening operation, the exhaust gas G in the replenishing main body 18 is connected from the upper end opening of the blow-up pipe 19 to the lower end opening and connection. Enter the replenishment tank 20 through the pipe 21,
When the gas pressure in the replenishment tank 20 becomes higher than the gas pressure of the exhaust gas G, the water or the liquid catalyst L in the replenishment tank 20 is replenished in the replenishment body 18 via the connecting pipe 21, and the replenishment body 18 is replenished.
The water or liquid catalyst L therein is blown up from the blow-up pipe 19 by the gas pressure in the replenishment tank 20, and is replenished into the liquid storage section 4 of the exhaust body 1 together with the exhaust gas G.

Since this embodiment has the above configuration,
Exhaust gas G emitted from the engine of the automobile is exhaust pipe 3
The exhaust gas G is introduced into the introduction pipe 3a through the introduction pipe 3a, and is discharged into the water or the liquid catalyst L in the liquid storage portion 4 through the introduction pipe 3a. The harmful components therein are removed or reduced, and the exhaust gas G in the liquid storage section 4 is introduced into the most advanced compartment R via the communication passage 10, and the exhaust gas G passes through each compartment R in a labyrinthine passage 6 The purified exhaust gas G that has passed through the plurality of compartments R sequentially through the mesh portion 11 in the communication passage 12 and then discharged to the outside through the exhaust portion 13. You can

At this time, since the buffer blade body 9 capable of suppressing the disturbing flow of water or liquid catalyst accompanying the introduction of the exhaust gas G is provided in the liquid storage section 4, it is caused by the gas pressure of the exhaust gas. The violent disturbance phenomenon of water or liquid catalyst in the liquid storage part 4 can be suppressed, the gas pressure is weakened, the gas-water separation action becomes good, and the water or liquid catalyst L is discharged to the outside together with the exhaust gas G. It is possible to suppress the amount of consumption due to the above, and it is possible to continue using for a long time.

Further, in this case, since the buffer blade body 9 is formed by arranging a plurality of twisted blade plates 14 radially, the disturbance suppressing action can be enhanced, and the labyrinthine passage of the water / water separating portion 5 can be enhanced. Since a plurality of baffles 16 capable of turning back the flow of the exhaust gas G are arranged in FIG. 6, the water or the liquid catalyst L is favorably separated by the collision and the turning back of the baffles 16 for cleaning. The exhaust gas G thus generated can be discharged.

The present invention is not limited to the above-described embodiments, but can be used in construction machines, boilers, mufflers for engines such as generators, refuse incinerators, and other combustion devices. The structure of the exhaust main body, the structure and quantity of the compartments, etc. are designed by appropriately changing them.

[0020]

As described above, according to the invention described in claim 1, the invention is an internal combustion engine such as a diesel engine for automobiles, ships, construction machines, etc., a refuse incinerator, a boiler,
Harmful components in exhaust gas discharged from generators and other combustion devices are removed or reduced by the contact action with water or liquid catalyst, and harmful solid components such as malodorous components and soot can be removed or reduced. Passes through a labyrinthine passage,
Water or liquid catalyst and gas are separated during passage, and the purified exhaust gas can be discharged through the exhaust unit,
At this time, since the buffer vanes capable of suppressing the disturbing flow of water or liquid catalyst accompanying the introduction of the exhaust gas are arranged in the liquid storage part, the water or liquid in the liquid storage part generated by the gas pressure of the exhaust gas is arranged. It is possible to suppress the violent disturbance phenomenon of the catalyst, weaken the gas pressure, improve the gas-water separation action, and suppress the consumption amount due to the water or the liquid catalyst L being discharged outside together with the exhaust gas, It can be used continuously for a long time.

According to the second aspect of the invention, since the buffer blade body is formed by radially disposing a plurality of twisted blade plates, it is possible to enhance the disturbance suppressing action. According to the invention described in claim 3, since a plurality of baffles capable of folding back the flow of the exhaust gas are arranged in the labyrinth-like passage of the water-water separating section, the water is collided with the baffles and the folding action causes water to flow. Alternatively, the gas-water separation action of the liquid catalyst is improved, and the exhaust gas can be discharged while suppressing the water content.

As described above, the initial purpose can be sufficiently achieved.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of an embodiment of the present invention.

FIG. 2 is a plan sectional view of an embodiment of the present invention.

FIG. 3 is a cross-sectional view of an exemplary embodiment of the present invention.

FIG. 4 is a partially cutaway cross-sectional view of an embodiment of the present invention.

FIG. 5 is an explanatory partial sectional view of an embodiment of the present invention.

[Explanation of symbols]

 G Exhaust Gas L Water or Liquid Catalyst 1 Exhaust Body 3 Exhaust Pipe 4 Liquid Storage Section 5 Water / Water Separation Section 6 Passage 9 Buffer Blade Body 13 Exhaust Portion 14 Twisted Blade Plate 16 Obstacle Body

Claims (3)

[Claims] 1. A liquid storage part containing water or a liquid catalyst is formed in an exhaust body, and exhaust gas exhausted from an engine is introduced into the liquid storage part through an exhaust pipe to store the exhaust gas. Removes or reduces harmful components in the exhaust gas by contacting the water or liquid catalyst in the exhaust gas section, and passes through the labyrinth-like passage of the air / water separation section to separate the water or liquid catalyst from the gas and remove the exhaust section. In the exhaust gas purification device that exhausts through
An exhaust gas purifying device, characterized in that a buffer vane capable of suppressing a disturbing flow of water or a liquid catalyst due to introduction of exhaust gas is arranged in the liquid storage section. 2. The exhaust gas purifying apparatus according to claim 1, wherein the buffer blade body is formed by radially disposing a plurality of twisted blade plates. 3. The exhaust gas purifying method according to claim 1, wherein a plurality of baffles capable of turning back the flow of exhaust gas are arranged in a labyrinth-like passage of the steam separation unit. apparatus.