JPH07293850A - Direct combustion type exhaust gas deodorizing device - Google Patents

Abstract

PURPOSE:To permit the extension of burning and staying time of exhaust gas in a combustion chamber by a method wherein an air discharging window is formed on the wall body of a combustion tube, forming the combustion chamber for burning combustible bad smell constituents, contained in the exhaust gas, by a burner, while a cover is arranged on the air discharging window. CONSTITUTION:A wind mill type flow regulating vanes 11 are arranged on the upper surface of bottom wall 10 of a combustion chamber 4 so as to be faced to the exhaust gas introducing port 12 of an air introducing tube 6 communicated with a gas and water separating chamber 5. A proper number of air suction ports 13 are bored below the flow regulating vanes 11 so as to be neighbored to the exhaust gas introducing port 12 of an air introducing tube 6. A frustum type guide tube 14 and two pieces of circular perforated red heat plates 15 are suspendedly fixed to the upper part of the air suction ports 13 while a proper number of air discharging windows 16 are formed on the inner tube 2 and a wall body 3 or the upper peripheral surface of the outer tube and a cover 17 is provided on the air discharging window 16. According to this method, the burning and staying time of exhaust gas in the combustion chamber 14 can be extended whereby deodorizing capacity for bad smell gas can be increased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a direct combustion type exhaust gas deodorizing apparatus used for removing malodors generated from malodor sources such as livestock manure treatment plants, human waste, sewage treatment plants, coatings, chemical plants, vacuum cars and the like. It is a thing.

[0002]

2. Description of the Related Art Conventionally, as a typical deodorizing method for this kind of malodorous exhaust gas, for example, JP-B-60-26264, JP-B-60-9111, JP-B-60-16839, and JP-B-55-50247. Gazette, Japanese Patent Publication No. 57-2
The structures shown in Japanese Patent No. 9621, Japanese Utility Model Publication No. 5-31389, etc. are known.

This conventional structure is basically a method of burning a flammable malodorous component in exhaust gas at a high temperature to oxidize and decompose it, and converting it into carbon dioxide gas and water vapor to deodorize it. A wide range of combustible odorous components such as hydrogen and ammonia can be removed at the same time, and its deodorizing effect is outstandingly excellent. It has already been put to practical use by the applicant of the present invention and is greatly useful in preventing foul odor pollution.

[0004]

However, in the case of the above-mentioned conventional structure, depending on the flow rate of the exhaust gas in the combustion chamber, it may be discharged from the exhaust window with insufficient combustion in the combustion chamber. Since deodorization of gas requires a combustion residence time of, for example, about 3 seconds or more at a high temperature of about 800 ° C., a short combustion residence time may reduce the deodorizing ability. Have

[0005]

SUMMARY OF THE INVENTION The present invention is intended to solve such inconvenience, and its gist is to form a combustion chamber for burning a combustible malodorous component contained in exhaust gas with a burner. In the direct combustion type exhaust gas deodorizing device, an exhaust window is formed on the wall of the combustion cylinder, and a cover is arranged on the exhaust window.

Further, at this time, a supporting member provided with a catalyst capable of removing or reducing sulfur-based chemical substances such as manganese, nickel-based metals, palladium and rhodium, and carbon-based chemical substances on the surface is disposed in the combustion chamber. You can

Further, the air-water separation chamber connected to the combustion chamber can be divided into two chambers, and a main opening / closing valve for inhaling exhaust gas having a truncated bomb-shaped valve body can be provided between the two chambers.

[0008]

[Function] The combustible malodorous component contained in the exhaust gas introduced in the combustion chamber is combusted, and the exhaust gas after combustion is discharged from the exhaust window formed in the wall of the combustion cylinder. Will act as a baffle to the exhaust gas discharged from the exhaust window.

Further, at this time, a supporting member provided with a catalyst capable of removing or reducing sulfur-based chemical substances such as manganese, nickel-based metals, palladium and rhodium, and carbon-based chemical substances on the surface is disposed in the combustion chamber. By doing so, exhaust gas can be purified.

Further, the air-water separation chamber connected to the combustion chamber is divided into two chambers, and a main open / close valve for inhaling exhaust gas having a truncated bomb-shaped valve body is provided between the two chambers, thereby causing a backfire phenomenon. Can be blocked.

[0011]

1 to 5 show an embodiment of the present invention, 1 is a combustion cylinder, and the combustion cylinder 1 is composed of an inner cylinder 2 and an outer cylinder 3,
A combustion chamber 4 is formed in the internal space, and a steam separation chamber 5 is provided below the combustion chamber 4, and the steam separation chamber 5 is connected to the combustion chamber 2 by several air guide pipes 6.

Further, in this case, in the lower portion of the combustion chamber 4,
A burner 8 and a spark plug 9 which use LP gas supplied from the fuel pipe 7 as a heat source are mounted, and a combustion chamber 4
A straightening vane 11 having a spirally twisted guiding wall is disposed on the upper surface of the bottom wall 10 of the No. 3 in a windmill type so as to face the exhaust gas inlet 12 of the air guiding pipe 6 leading to the steam separation chamber 5. An appropriate number of air inlets 13 are provided below the exhaust gas inlet 11 adjacent to the exhaust gas inlet 12, and a frustoconical guide tube 14 and two circular perforated red hot plates are provided above the air inlet 13. 15 and 15 are fixed in space, and a proper number of exhaust windows 16 are formed on the peripheral side surfaces of the inner cylinder 2 and the outer cylinder as the wall body 3, and a cover 17 is provided on the exhaust windows 16.

In this case, the perforated red hot plates 15 and 15 are used as a bearing member 18, and a sulfur-based chemical substance (S) such as manganese, nickel-based metal, palladium, rhodium or a carbon-based chemical substance is provided on the surface of the bearing member 18. A catalyst 19 capable of removing or reducing (NO) is applied by means such as vapor deposition.

In the air / water separation chamber 5, a partition wall 20 is provided in the middle of the cylindrical body 5a to divide the interior into two chambers, upper and lower, into chambers 21 and 22. A main opening / closing valve 23 for sucking exhaust gas is provided, and a bottom wall 22a of the lower chamber 22 is provided.
In the figure, an exhaust gas intake pipe 24 leading to a human waste tank or the like (not shown), an appropriate number of auxiliary opening / closing valves 25, and a drain pipe 26 are arranged.

In this case, the main opening / closing valve 23 has an inlet 23a formed at the center of the partition wall 20 as shown in FIG.
A valve seat 23b is arranged on the periphery of 3a, several locking pieces 23c are erected on the partition wall 20, and a truncated-bullet-shaped valve element 23d is installed between the valve seat 23b and the locking piece 23c. As shown in FIG. 5, the auxiliary opening / closing valve 25 has several air openings 25a formed around the bottom wall 22a, and the valve seat 25 is formed around the air openings 25a.
b, the guide piece 25c is vertically provided on the back surface of the bottom wall 22a, and the hemispherical valve body 25d is seated on the valve seat 25b.
5a is integrally formed with the guide shaft 25e, the guide shaft 25e is inserted into the guide hole of the guide piece 25c, the split pin 25f is screwed onto the guide shaft 25e, and the bottom wall 22a is provided with a circular upper surface around the valve body 25d. Startup guide 2 with a shape that encloses approximately a quarter
Two 5g pairs are provided, and a ventilation groove 25h is formed between the rising guides 25g.

However, at the time of normal exhaust gas introduction in which exhaust gas is being sent into the lower chamber 22 by the air pressure of a vacuum pump, for example, since the lower chamber 22 has a positive pressure, the main opening / closing valve 2
Since the valve body 23d of No. 3 floats up and the valve body 25d of the auxiliary opening / closing valve 25 is seated on the valve seat 23b, the exhaust gas is sent to the combustion chamber 4 through the inlet 23a. During suction operation, for example, when foreign matter is blocked in the hose removal hose connected to the vacuum pump and it is not possible to remove the foreign material, the vacuum pump is reverse-injected to remove the foreign matter in the hose removal hose by the pressure, and then The suction operation is started again, but at the time of this reverse injection, the lower chamber 22
The inside becomes negative pressure, and first, the valve body 23d of the main opening / closing valve 23, which is light in weight, is seated on the valve seat 23b and closes the inlet 23a, thereby preventing the backfire phenomenon of the combustion flame,
After a little later, the valve body 25d of the auxiliary opening / closing valve 25 rises due to the negative pressure to open the air port 25a, the outside air is introduced into the lower chamber 22 through the air port 25a, and the inside of the lower chamber 22 returns to the positive pressure. This time, the valve body 25d of the auxiliary opening / closing valve 25 having a large weight first closes the air port 25a, and then the valve body 23 of the main opening / closing valve 23.
Since d is floating and rising, the inside of the lower chamber 22 does not become a large negative pressure, and the extinguishing phenomenon of the burner 8 is prevented.

Since this embodiment has the above-mentioned construction, for example, when it is mounted on a vacuum car, the exhaust gas G as an odorous gas that fills the offensive odor source such as a human waste tank is a vacuum pump or the like not shown in the figure that operates when collecting human waste. Enter the steam-water separation chamber 5 through the lower exhaust gas intake pipe 24, where mist and other water contained in the exhaust gas G are separated and removed. After that, several water vapors are provided in the upper part of the steam-water separation chamber 5. The exhaust gas G is supplied into the combustion chamber 4 through the air guide pipe 6, and the exhaust gas G is heated and burned by the burner 8 arranged in the lower center of the combustion chamber 4, and the combustible malodorous component contained in the exhaust gas G is oxidized and decomposed by the combustion. The exhaust gas G after being deodorized and burned passes through the exhaust window 16 and is discharged to the outside.

At this time, the cover 17 acts as a baffle plate for the exhaust gas G discharged from the exhaust window 16, so that not only can the effect of rainstorm be suppressed when it is installed outdoors, but also inside the combustion chamber 4. The combustion residence time of the exhaust gas G can be extended and the deodorizing ability of the malodorous gas can be enhanced accordingly.

Further, the perforated red hot plate 15 is provided in the combustion chamber 4.
A catalyst 19 capable of removing or reducing sulfur-based chemical substances (S) such as manganese, nickel-based metals, palladium and rhodium and carbon-based chemical substances (NO) is provided on the surface of the bearing member 18. Since it is applied by means such as vapor deposition, not only the above deodorizing effect but also the sulfur-based chemical substances and carbon-based chemical substances are removed or reduced. For example, as a specific numerical value, NO _{2 of the} original exhaust gas is 100 ppm to 5 pp
m, 30 ppm of NO _X in the original exhaust gas from 100ppm
The gas can be reduced to a certain degree, and thus can be discharged to the outside through the exhaust window 16 as a gas that has been cleaned and deodorized.

In addition, the air-water separation chamber 5 connected to the combustion chamber 4 is divided into two chambers 21 and 22, and a valve body 23d in the shape of a truncated bomb is provided between the two chambers 21 and 22 for inhaling exhaust gas. By providing the main opening / closing valve 23, it is possible to prevent a backfire phenomenon that is a reverse flow from the combustion chamber 4 to the steam separation chamber 5 side,
Moreover, since the valve body 23d has the shape of a truncated bomb, it has a low center of gravity, so that the valve body 23d can be reliably closed and excellently blocked.

The present invention is not limited to the vacuum car applied to the above embodiment, but can be applied to the removal of offensive odors from offensive odor sources such as livestock manure treatment plants, human waste, sewage treatment plants, coatings and chemical plants.

In the above embodiment, the burner for LP gas (propane gas) is used as the combustion source, but a burner for kerosene or light oil may be used.

Further, as the combustion structure, for example
As disclosed in Japanese Patent Publication No. 31389/1993, it can be applied to a multi-stage deodorizing structure in which a plurality of combustion chambers are provided and combustion is deodorized stepwise over a plurality of times.
Although the perforated red hot plates 15 and 15 are used as the above, other combustion chamber constituent members may be used, or the supporting member 18 may be disposed separately from the constituent members. The installation position of 18 is also changed and designed appropriately.

[0024]

As described above, according to the present invention, the combustible malodorous component contained in the exhaust gas introduced into the combustion chamber can be burned to deodorize, and at the time of this burning, the cover is removed from the exhaust window. It acts as a baffle against the exhaust gas discharged, and therefore, for example, when installed outdoors, not only can the effects of storm outside wind be suppressed, but also the combustion residence time of the exhaust gas in the combustion chamber can be extended, and that much odorous gas The deodorizing ability can be enhanced.

At this time, manganese on the surface of the combustion cylinder,
Not only deodorization, but also sulfur-based chemical substances and carbon-based chemical substances by arranging a bearing member that has a catalyst that can remove or reduce sulfur-based chemical substances such as nickel-based metals, palladium, and rhodium Can be removed or reduced, and can be discharged to the outside as a gas that has been cleaned and deodorized.

Further, the air / water separation chamber connected to the combustion chamber is divided into two chambers, and a main opening / closing valve for exhaust gas intake having a truncated bomb-shaped valve body is provided between the two chambers to separate the combustion chamber from the combustion chamber. It is possible to prevent the backfire phenomenon, which is a backflow to the air-water separation chamber side, and the valve body has a low-bulk shell shape, so that the center of gravity is low, so that the valve body can be reliably closed and the backfire phenomenon can be excellently prevented.

The intended purpose described above can be sufficiently achieved.

[Brief description of drawings]

FIG. 1 is an overall partial cross-sectional perspective view of an embodiment of the present invention.

2 is a vertical cross-sectional view of the embodiment of the present invention shown in FIG.

FIG. 3 is a plan sectional view of the embodiment of the present invention shown in FIG.

FIG. 4 is a partial vertical cross-sectional view of the embodiment of the present invention shown in FIG.

5 is a partial vertical cross-sectional view of the embodiment of the present invention shown in FIG.

[Explanation of symbols]

 1 Combustion Cylinder 3 Wall 4 Combustion Chamber 5 Water-Water Separation Chamber 8 Burner 16 Exhaust Window 18 Bearing Member 19 Catalyst 20 Upper Chamber 21 Lower Chamber 23 Main Open / Close Valve 23d Valve Body

Claims (3)

[Claims] 1. An exhaust window is formed in a wall of a combustion cylinder forming a combustion chamber for burning a combustible malodorous component contained in exhaust gas by a burner, and a cover is arranged on the exhaust window. Direct combustion type exhaust gas deodorizing device. 2. A support member provided with a catalyst capable of removing or reducing sulfur-based chemical substances such as manganese, nickel-based metals, palladium and rhodium and carbon-based chemical substances on the surface in the combustion chamber. Item 1. A direct combustion type exhaust gas deodorizing apparatus according to Item 1. 3. A gas-water separation chamber connected to the combustion chamber is divided into two chambers, and a main opening / closing valve for exhaust gas intake having a truncated bomb-shaped valve body is provided between the two chambers. The direct combustion type exhaust gas deodorizing apparatus according to 1 or 2.