CN214680983U - Waste gas treatment system of sulfur ammonia device for coke oven gas desulfurization - Google Patents
Waste gas treatment system of sulfur ammonia device for coke oven gas desulfurization Download PDFInfo
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- CN214680983U CN214680983U CN202023206704.4U CN202023206704U CN214680983U CN 214680983 U CN214680983 U CN 214680983U CN 202023206704 U CN202023206704 U CN 202023206704U CN 214680983 U CN214680983 U CN 214680983U
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Abstract
The utility model relates to a coke oven gas desulfurization thiamine device exhaust treatment system belongs to exhaust-gas treatment technical field. The system is positioned between a waste gas inlet pipeline and a waste gas outlet pipeline and comprises an absorption device, a biological reaction device and a photocatalysis device which are connected in sequence; the method aims at treating ammonia gas, hydrogen sulfide and benzene in the waste gas discharged by the sulfur-ammonia desulphurization device for the coke oven gas, solves the problems of stink and unclean treatment of low-concentration benzene which cannot be solved by the conventional method, ensures that the waste gas after treatment can meet the corresponding discharge standard of China, and is suitable for popularization and application.
Description
Technical Field
The utility model relates to a waste gas treatment technical field particularly, is a coke oven gas desulfurization thiamine device exhaust treatment system.
Background
The coal coking industry is an industrial support industry in China, but waste gas generated in the coal coking process can cause serious harm to the environment and seriously affect the quality of life of people in China. Along with the increasing industrial development speed and the increasing environmental protection situation in China, the treatment of the waste gas in the coal coking industry becomes reluctant.
The coke oven gas is a pyrolysis gas generated after coal is subjected to dry distillation in a high-temperature environment, the coke oven gas contains methane, benzene, hydrogen sulfide, ammonia gas, naphthalene, carbon monoxide, methane and other gases, and the sulfur and ammonia desulfurization device of the coke oven gas is mainly used for recovering the hydrogen sulfide and the ammonia gas in the coke oven gas.
In the production process of the sulfur and ammonia desulfurization device for the coke oven gas, a process storage tank and a reactor can discharge a large amount of waste gas, and main pollutants in the waste gas are hydrogen sulfide, ammonia gas and a trace amount of benzene. For the part of waste gas, most of the existing coking plants adopt a direct discharge mode to discharge the waste gas into the atmosphere, which can not meet the corresponding discharge standard of China and damage the environment, and the part of the coking plants adopt a washing process to treat the part of the waste gas, and the washing can remove part of pollutants, but can not reach the discharge standard of malodorous pollutants and the discharge standard of benzene series.
SUMMERY OF THE UTILITY MODEL
The utility model provides a solve above-mentioned problem and propose especially the utility model provides a coke oven gas desulfurization thiamine device exhaust treatment system handles to ammonia, hydrogen sulfide and benzene among the coke oven gas desulfurization thiamine device exhaust gas, has solved the problem of the bad smell problem that conventional method can't solve and the treatment of low concentration benzene is not clean, makes waste gas can satisfy the corresponding emission standard of china after handling.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a waste gas treatment system of a sulfur ammonia device for coke oven gas desulfurization is positioned between a waste gas inlet pipeline and a waste gas outlet pipeline and comprises an absorption device, a biological reaction device and a photocatalysis device which are connected in sequence; the absorption device is connected with an external waste gas inlet pipeline; the photocatalytic device is connected with an external waste gas outlet pipeline.
The absorption device comprises a first-stage absorption tower, a second-stage absorption tower and a third-stage absorption tower which are sequentially connected, an absorption liquid circulating pipeline and an absorption liquid circulating pump are arranged on each stage of absorption tower, and an absorption tower filler and an absorption tower spray head are arranged in each stage of absorption tower.
The bioreactor comprises a bioreactor, a bioreactor nutrient solution pump and a nutrient solution box which are connected in sequence, wherein a bioreactor filler is arranged in the bioreactor, and the bioreactor is one or more of a biofiltration reactor, a biotrickling filter reactor and a biological washing reactor. The photocatalysis device comprises a photocatalysis reactor, and an ultraviolet lamp tube and a catalyst are arranged in the photocatalysis reactor.
And two ends of the bioreactor are respectively connected with the three-stage absorption tower and the photocatalytic reactor.
The absorption tower comprises a primary absorption tower, a secondary absorption tower, a tertiary absorption tower and a water tank, wherein the primary absorption tower is filled with acidic absorption liquid, the secondary absorption tower is filled with alkaline absorption liquid, the tertiary absorption tower is filled with water, and the positions of the primary absorption tower and the secondary absorption tower can be exchanged.
The absorption tower filler is an inert acid and alkali resistant material.
Preferably, the absorption tower packing is a plastic hollow sphere.
The number of the spray heads of the absorption tower is 1 or more.
The bioreactor packing is inert porous material.
The photocatalyst is titanium dioxide.
The utility model has the advantages that the waste gas is absorbed by three stages, so that the alkaline ammonia gas and the acidic hydrogen sulfide gas can be effectively removed; through biological treatment, the odor of the waste gas is greatly removed, and meanwhile, the used microorganisms can grow by taking organic matters in the waste gas as a carbon source, so that the cost is saved; the photocatalysis can effectively remove trace benzene in the waste gas, greatly improve the treatment degree of the desulfurized thiamine waste gas, ensure that the treated waste gas can meet the relevant standards in the emission standard of malodorous pollutants and the emission standard of benzene in the emission standard of coking chemical industry pollutants, and solve the problem that the malodorous and benzene of the existing treatment device can not reach the standard.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic diagram of the system structure of the present invention.
In the figure: 1-an exhaust gas inlet conduit; 2-a first-stage absorption tower; 3-a secondary absorption tower; 4-a third-stage absorption tower; 5-a bioreactor; 6-a photocatalytic reactor; 7-an exhaust gas outlet conduit; 8-bioreactor nutrient solution pump; 9-nutrient solution tank; 10-first stage absorption liquid circulating pipeline; 11-first stage absorption liquid circulating pump; 12-a secondary absorption liquid circulation pipeline; 13-a secondary absorption liquid circulating pump; 14-a third-stage absorption liquid circulating pipeline; 15-three-stage absorption liquid circulating pump; 16-absorber packing; 17-an absorption tower spray head; 18-bioreactor packing; 19-ultraviolet lamp tube; 20-catalyst.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and in combination with the embodiments of the present invention, it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
The waste gas treatment system of the sulfur ammonia device for coke oven gas desulfurization is positioned between a waste gas inlet pipeline 1 and a waste gas outlet pipeline 7 and comprises an absorption device, a biological reaction device and a photocatalytic device which are connected in sequence; the absorption device is connected with an external waste gas inlet pipeline 1; the photocatalytic device is connected to an external exhaust outlet pipe 7.
The absorption device comprises a first-stage absorption tower 2, a second-stage absorption tower 3 and a third-stage absorption tower 4 which are sequentially connected, and waste gas enters the first-stage absorption tower 2 through a waste gas inlet pipeline 1.
2 bottoms in one-level absorption tower are connected with one-level absorption liquid circulating line 10 and one-level absorption liquid circulating pump 11, the top is equipped with absorption tower shower nozzle 17, the middle part is equipped with absorption tower filler 16, absorption tower filler 16 is the plastic hollow ball of inertia acid and alkali-resistance, the absorption liquid of acid medium is equipped with in one-level absorption tower 2, one-level absorption liquid circulating pump 11 promotes the absorption liquid to 2 tops in one-level absorption tower, spray through absorption tower shower nozzle 17, form the absorption liquid film on absorption tower filler 16 surface, mass transfer through gas film and liquid film, alkaline gas ammonia etc. in the waste gas is absorbed by the absorption liquid, reduce the alkaline gas in the waste gas, absorption efficiency can reach more than 95%.
Waste gas enters a second-stage absorption tower 3 after passing through a first-stage absorption tower 2, the bottom of the second-stage absorption tower 3 is connected with a second-stage absorption liquid circulating pipeline 12 and a second-stage absorption liquid circulating pump 13, the top of the second-stage absorption tower is provided with an absorption tower nozzle 17, the middle of the second-stage absorption tower is provided with an absorption tower filler 16, the absorption tower filler 16 is an inert acid-alkali-resistant plastic hollow ball, absorption liquid of an alkaline medium is filled in the second-stage absorption tower 3, sodium hydroxide can be used, the second-stage absorption liquid circulating pump 13 lifts the absorption liquid to the top of the second-stage absorption tower 3, the absorption liquid is sprayed through the absorption tower nozzle 17, an absorption liquid film is formed on the surface of the absorption tower filler 16, and through diffusion of a gas film and a liquid film, acidic gas hydrogen sulfide and the like in the waste gas are absorbed, the content of acidic gas in the waste gas is greatly reduced, and the absorption efficiency reaches over 95%.
Waste gas gets into tertiary absorption tower 4 behind second grade absorption tower 3, and 4 bottoms in tertiary absorption tower are connected with tertiary absorption liquid circulating line 14 and tertiary absorption liquid circulating pump 15, and the top is equipped with absorption tower shower nozzle 17, and the middle part is equipped with absorption tower filler 16, and absorption tower filler 16 is the plastics hollow sphere of inertia acid and alkali-resistance, and tertiary absorption tower 4 is equipped with the absorption liquid, usable water. The three-stage absorption tower 4 is mainly used for increasing humidity of the waste gas and adjusting PH, absorption liquid in the three-stage absorption tower 4 is lifted to the top of the tower by a three-stage absorption liquid circulating pump 15 and is sprayed out through an absorption tower spray head 17 to adjust the PH and the humidity of the waste gas.
The bioreactor device comprises a bioreactor 5, a bioreactor nutrient solution pump 8 and a nutrient solution box 9 which are connected in sequence, wherein a bioreactor filler 18 is arranged in the bioreactor 5, the bioreactor 5 is a combination of a biofiltration reactor, a biotrickling reactor and a biological washing reactor, and the bioreactor filler 18 is made of inert porous materials.
Most of hydrogen sulfide and ammonia gas in the waste gas are removed after the waste gas is subjected to three-stage absorption, but a small amount of residual hydrogen sulfide and ammonia gas still remain, and the waste gas belongs to malodorous substances due to extremely low odor threshold values of the hydrogen sulfide and the ammonia gas. Bioreactor filler 18 in bioreactor 5 can provide space for the growth of microorganisms, inoculate the microorganisms on bioreactor filler 18, form the biomembrane, waste gas gets into bioreactor 5 behind tertiary absorption tower 4, remaining low concentration hydrogen sulfide and ammonia in the waste gas can permeate the microorganism cell membrane and get into inside the cell, get rid of through the respiratory of microorganism, degrade foul class material into innoxious substance, contain the trace organic matter in the waste gas simultaneously and can provide the carbon source for the growth of microorganisms, supplement the trace metal element for the microorganisms through bioreactor nutrient solution pump 8 and nutrient solution case 9 regularly and can satisfy its growth demand. The retention time of the waste gas in the bioreactor 5 exceeds 25S, and the stink treatment efficiency is more than 80%.
The photocatalysis device comprises a photocatalysis reactor 6, an ultraviolet lamp tube 19 and a catalyst 20 are arranged in the photocatalysis reactor 6, and the catalyst 20 is made of a plate coated with titanium dioxide on the surface. The content of hydrogen sulfide and ammonia gas in the waste gas reaches the standard after passing through the bioreactor 5, but a trace amount of benzene in the waste gas belongs to a substance difficult to biodegrade, the waste gas enters the photocatalytic reactor 6 after passing through the bioreactor 5, the ultraviolet lamp tube 19 in the photocatalytic reactor 6 can convert oxygen in the air into ozone, the ozone belongs to a strong oxidation substance, and the catalyst 20 has electron holes in titanium dioxide, so that the oxidation decomposition of the oxygen in the waste gas by the ozone can be promoted. The treatment efficiency of benzene in the waste gas after passing through the photocatalytic reactor 6 is more than 70 percent, and the standard-reaching discharge of benzene series can be realized.
The experimental data for this system is shown in the table below,
Claims (4)
1. a waste gas treatment system of a sulfur ammonia device for coke oven gas desulfurization is positioned between a waste gas inlet pipeline and a waste gas outlet pipeline and is characterized by comprising an absorption device, a biological reaction device and a photocatalysis device which are sequentially connected;
the absorption device comprises a first-stage absorption tower, a second-stage absorption tower and a third-stage absorption tower which are sequentially connected, each stage of absorption tower is provided with an absorption liquid circulating pipeline and an absorption liquid circulating pump, and an absorption tower filler and an absorption tower spray head are arranged in each stage of absorption tower;
the first-stage absorption tower is filled with acidic absorption liquid, the second-stage absorption tower is filled with alkaline absorption liquid, and the third-stage absorption tower is filled with water;
the bioreactor comprises a bioreactor, a bioreactor nutrient solution pump and a nutrient solution box which are connected in sequence, wherein a bioreactor filler is arranged in the bioreactor, and the bioreactor is one or the combination of a biofiltration reactor, a biotrickling filter reactor and a biological washing reactor;
the photocatalysis device comprises a photocatalysis reactor, and an ultraviolet lamp tube and a catalyst are arranged in the photocatalysis reactor;
and two ends of the bioreactor are respectively connected with the absorption device and the photocatalytic reactor.
2. The waste gas treatment system of the sulfur ammonia device for desulfurization of coke oven gas as claimed in claim 1, wherein the absorption tower filler is an inert acid and alkali resistant material.
3. The waste gas treatment system of the sulfur and ammonia removal device for coke oven gas as claimed in claim 2, wherein the number of the spray heads of the absorption tower is 1 or more.
4. The waste gas treatment system of the sulfur and ammonia removal device for coke oven gas as claimed in claim 3, wherein the bioreactor packing is an inert porous material.
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| CN202023206704.4U CN214680983U (en) | 2020-12-25 | 2020-12-25 | Waste gas treatment system of sulfur ammonia device for coke oven gas desulfurization |
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| CN202023206704.4U CN214680983U (en) | 2020-12-25 | 2020-12-25 | Waste gas treatment system of sulfur ammonia device for coke oven gas desulfurization |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115216325A (en) * | 2022-07-13 | 2022-10-21 | 中国矿业大学 | High-sulfur petroleum coke efficient desulfurization process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115216325A (en) * | 2022-07-13 | 2022-10-21 | 中国矿业大学 | High-sulfur petroleum coke efficient desulfurization process |
| CN115216325B (en) * | 2022-07-13 | 2023-09-08 | 中国矿业大学 | High-efficiency desulfurization process for high-sulfur petroleum coke |
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