JPH09882A - Deodorizing device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a deodorizing device capable of efficiently deodorizing while obtaining a catalytic effect equivalent to that of powdered activated carbon while avoiding the problem of activated carbon loss. [Structure] A circulating tank 25 is provided at the bottom of the deodorizing tower 23, and a circulating liquid 2 circulated and supplied from the circulating tank 25 between the odorous gas inlet 21 and the deodorizing gas outlet 22 in the deodorizing tower 23.
A spray nozzle 28 for spraying 4 is provided, and a filler layer 29 is provided below the spray nozzle 28. Filler layer 29
Is composed of a carbon ceramic filler that acts as a catalyst for the reaction between the malodorous component and the chemical liquid. [Effect] Since the height of the filler layer can be reduced, the device can be made compact.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deodorizing apparatus used for removing malodorous components such as hydrogen sulfide in human waste treatment facilities.

[0002]

2. Description of the Related Art Conventionally, in a human waste treatment facility or the like, a deodorizing device as shown in FIG. 2 is used to remove malodorous components such as hydrogen sulfide.

In the deodorizing device, an odorous gas inlet 1 is formed in the lower part and a deodorizing gas outlet 2 is formed in the upper part to form a deodorizing tower 3, and a circulation tank 4 is provided at the bottom of the deodorizing tower 3 to form the deodorizing tower. 3, a precipitation tank 5 is provided outside the circulation tank 4, a circulation liquid 6 containing caustic soda is stored inside the circulation tank 4, and a powdered activated carbon 7 is introduced into the precipitation tank 5.

Further, between the odorous gas inlet 1 and the deodorant gas outlet 2 in the deodorization tower 3, there is provided a spray nozzle 8 for spraying the circulating liquid 6 circulated and supplied from the circulation tank 4, and the spray nozzle 8 is provided. The filler layer 9 is provided below.

In this structure, a high-concentration odor gas A containing a malodorous component such as hydrogen sulfide is introduced into the tower 3 through the odor gas inlet 1, and the spray nozzle 8 is applied to the introduced high-concentration odor gas A. Circulating liquid containing more caustic soda 6
Is sprinkled on the filler layer 9, and the high-concentration odorous gas A and the circulating liquid 6 are sufficiently contacted with each other to remove the malodorous components such as hydrogen sulfide in the high-concentration odorous gas A by the reaction with caustic soda, and the sulfurization The deodorized gas B from which hydrogen has been removed is led to the next system through the deodorized gas outlet 2.

Then, the reaction product of hydrogen sulfide and caustic soda is sent to the precipitation tank 5 via the circulation tank 4, and the reaction is further advanced by the catalytic action of the activated carbon 7 in the tank. The mixed liquid in the precipitation tank 5 containing caustic soda is returned to the circulation tank 4.

Then, in order to adjust the salt concentration in the circulating fluid 6, fresh water 10 is replenished to the circulating tank 4 to blow out blow water 11 from the precipitation tank 5, or when the pH of the circulating fluid 6 is lowered, caustic soda is used. Supplying 12 In addition, when the activated carbon powder mixed in the mixed liquid returned from the settling tank 5 is contained in the circulating liquid 6 and sprayed from the spray nozzle 8 and adheres and deposits on the filler layer 9, the filler layer 9 is removed. Washing.

The reaction in the above deodorizing apparatus is as shown by the following reaction formula, and an effective chemical reaction occurs due to the catalytic action of the powdered activated carbon 7.

[0009]

Embedded image

That is, Na ₂ S remaining as scale
Is not generated, and the oxidation reaction is promoted up to Na ₂ S ₂ O ₃ .

[0011]

However, in the above-mentioned conventional deodorizing device, the powdered activated carbon 7 is charged, and therefore it is inconvenient to handle. In addition, when the fresh water 10 is replenished, part of the activated carbon 7 flows out along with the blow water 11, or the activated carbon 7 flows out when the filling material layer 9 is washed.
Since the washout may reach several percent, it was necessary to replenish the activated carbon 7 regularly.

The present invention solves the above problems, and an object of the present invention is to provide a deodorizing device capable of effectively deodorizing while obtaining a catalytic effect equivalent to that of powdered activated carbon while avoiding the problem of running out of activated carbon. To do.

[0013]

In order to solve the above problems, the deodorizing apparatus of the present invention forms a deodorizing tower by forming an odorous gas inlet at the bottom and forming a deodorizing gas outlet at the top.
A chemical liquid circulating tank is provided at the bottom of the deodorizing tower, and a spray nozzle for spraying the chemical liquid circulated and supplied from the chemical liquid circulating tank is provided between the odorous gas inlet and the deodorant gas outlet in the deodorizing tower. In the deodorizing device, in which a filler layer is provided below the nozzle, and the malodorous component in the odorous gas that has flowed into the deodorizing tower is removed by the reaction with the chemical liquid, the filler layer, the malodorous component and the chemical liquid It is composed of a carbon ceramic filler that acts as a catalyst for the reaction.

In the deodorizing apparatus of the present invention, the carbon ceramic filler is formed as a porous material having a cylindrical or prismatic shape having a diameter or a length of 1 cm or more and having pores having a diameter of 100 Å or more.

[0015]

The carbon ceramic has carbon having a catalytic effect equivalent to that of activated carbon immobilized on the ceramic.
According to the above configuration, since such a carbon ceramic is used as the filler, in the state where the carbon ceramic is maintained in the deodorization tower, the reaction between the malodorous component and the chemical liquid can be promoted in the same manner as activated carbon, and the handling is easy. It's easy.

The carbon ceramic filler has a pore size of 1
Since it is a porous material having pores of 00 Å or more, the gas-liquid contact ratio is high and a high deodorizing effect can be obtained. Further, since the carbon ceramic filler is formed into a columnar shape or a prismatic shape having a diameter or a length of 1 cm or more, static pressure loss is small.

[0017]

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, the deodorizing device is configured almost the same as the conventional deodorizing device described with reference to FIG. 2, and an odorous gas inlet 21 is formed in the lower portion and a deodorizing gas outlet 22 is formed in the upper portion. Circulation tank 2 that constitutes the deodorization tower 23 and stores a circulating liquid 24 containing caustic soda at the bottom of the deodorization tower 23.
5 are provided.

Further, between the odorous gas inlet 21 and the deodorant gas outlet 22 in the deodorizing tower 23, a spray nozzle for spraying a circulating liquid 24 circulated and supplied from a circulating tank 25 by a circulation pipe 26 and a circulation pump 27. 28, and a carbon ceramic filler layer 29 is provided below the spray nozzle 28.
Is provided.

The carbon ceramic filler layer 29 is composed of a porous carbon ceramic filler. Each carbon ceramic filler is formed into a cylindrical or prismatic shape having a diameter or a length of 1 cm or more, and a hole having a hole diameter of 100 Å or more. And has a catalytic effect equivalent to that of activated carbon.

Reference numeral 30 is a pH meter, 31 is a caustic soda supply pipe provided with a supply pump 32, 33 is a fresh water supply pipe, and 34 is a drain pipe connected to the upper end of the circulation tank 25.
When a constant pH drop of the circulating liquid 24 is detected by the total 30, the supply pump 32 is driven to drive the caustic soda supply pipe 3
When caustic soda is supplied from No. 1 and the salt concentration in the circulating liquid 24 rises, fresh water is supplied from the fresh water supply pipe 33 and blow water flows out from the drain pipe 34.

The operation of the above structure will be described below.
A high-concentration odor gas X containing hydrogen sulfide or the like is introduced from the odor gas inlet 21 into the tower 23, and the circulating liquid 24 containing caustic soda is sprayed from the spray nozzle 28 to the high-concentration odor gas X introduced. To do.

Then, the high-concentration odorous gas X and the circulating liquid 24 efficiently come into contact with each other on the surface of the carbon ceramic filler constituting the carbon ceramic filler layer 29 or at the holes.
This carbon ceramic filler serves as a catalyst to promote the reaction between hydrogen sulfide in the high-concentration odorous gas X and the caustic soda in the circulating liquid 24. Therefore, in the deodorization tower 23, the same reaction as shown in the above reaction formula is performed. The reaction occurs and hydrogen sulfide is effectively removed. Then, the deodorized deodorized gas Y flows out from the deodorized gas outlet 22.

Since the carbon ceramic filler is formed into a columnar shape or a prismatic shape having a diameter or a length of 1 cm or more, it is maintained without flowing out from the deodorization tower 23, and the static pressure loss due to the carbon ceramic filler is small. .

[0024]

As described above, according to the present invention, instead of the conventional settling tank containing powdered activated carbon, carbon ceramics having a catalytic effect equivalent to that of powdered activated carbon is placed in the deodorizing tower as a filler. As a result, the deodorization can be effectively carried out by promoting the reaction between the malodorous component and the chemical solution while avoiding the problem of the activated carbon flowing out.

Further, the carbon ceramic filler is formed into a columnar shape or a prismatic shape having a diameter or a length of 1 cm or more, and is made porous so as to have pores having a pore diameter of 100 Å or more. Further, the gas-liquid contact ratio can be increased, and thus a high deodorizing effect can be obtained. Therefore, the height of the filler layer can be made lower than before, and the device can be made compact. For example,
In the conventional deodorizing device, the overall moving unit height (H _OG ) is 0.
33 (m) was 0.2 in the deodorizing device of the present invention.
(M), and the height of the filler layer could be reduced by 40%.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing the overall configuration of a deodorizing device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an overall configuration of a conventional deodorizing device.

[Explanation of symbols]

 21 Odor gas inlet 22 Deodorant gas outlet 23 Deodorizing tower 24 Circulating liquid (chemical liquid) 25 Circulating tank (chemical liquid circulating tank) 28 Spray nozzle 29 Filler layer X Odor gas Y Y Deodorizing gas

Claims (2)

[Claims] 1. A deodorizing tower is formed by forming an odorous gas inlet at the lower part and a deodorizing gas outlet at the upper part, and a chemical liquid circulation tank is provided at the bottom of the deodorizing tower, and the odorous gas flow in the deodorizing tower is provided. Between the inlet and the deodorant gas outlet, a spray nozzle for spraying the chemical solution circulated and supplied from the chemical solution circulation tank is provided,
In the deodorizing device, in which a filler layer is provided below the spray nozzle, and the malodorous component in the odorous gas flowing into the deodorizing tower is removed by the reaction with the chemical liquid, the filler layer is used as the malodorous component. A deodorizing device comprising a carbon ceramic filler that acts as a catalyst for a reaction with a chemical liquid. 2. The deodorizing device according to claim 1, wherein the carbon ceramic filler is a porous material having a cylindrical or prismatic shape having a diameter or a length of 1 cm or more, and having pores having a pore diameter of 100 Å or more. .