CN109078481B - Hydrocarbon solvent VOCs waste gas integrated treatment system and device - Google Patents
Hydrocarbon solvent VOCs waste gas integrated treatment system and device Download PDFInfo
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- CN109078481B CN109078481B CN201811220282.0A CN201811220282A CN109078481B CN 109078481 B CN109078481 B CN 109078481B CN 201811220282 A CN201811220282 A CN 201811220282A CN 109078481 B CN109078481 B CN 109078481B
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- 239000002912 waste gas Substances 0.000 title claims abstract description 73
- 239000012855 volatile organic compound Substances 0.000 title claims abstract description 44
- 239000004215 Carbon black (E152) Substances 0.000 title claims abstract description 27
- 229930195733 hydrocarbon Natural products 0.000 title claims abstract description 27
- 150000002430 hydrocarbons Chemical class 0.000 title claims abstract description 27
- 239000002904 solvent Substances 0.000 title claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 214
- 239000010802 sludge Substances 0.000 claims abstract description 72
- 238000001179 sorption measurement Methods 0.000 claims abstract description 67
- 239000007789 gas Substances 0.000 claims abstract description 57
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 50
- 238000000926 separation method Methods 0.000 claims abstract description 39
- 238000010521 absorption reaction Methods 0.000 claims abstract description 36
- 239000010865 sewage Substances 0.000 claims abstract description 22
- 230000015556 catabolic process Effects 0.000 claims abstract description 13
- 238000006731 degradation reaction Methods 0.000 claims abstract description 13
- 230000000813 microbial effect Effects 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 23
- 238000003860 storage Methods 0.000 claims description 23
- 238000009826 distribution Methods 0.000 claims description 20
- 238000005192 partition Methods 0.000 claims description 20
- 239000000945 filler Substances 0.000 claims description 13
- 239000007921 spray Substances 0.000 claims description 9
- 238000004062 sedimentation Methods 0.000 claims description 7
- 244000005700 microbiome Species 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 abstract description 11
- 238000006065 biodegradation reaction Methods 0.000 abstract description 9
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 16
- 238000004064 recycling Methods 0.000 description 9
- 239000007788 liquid Substances 0.000 description 8
- 238000005273 aeration Methods 0.000 description 7
- 239000002351 wastewater Substances 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000010992 reflux Methods 0.000 description 4
- 230000001502 supplementing effect Effects 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 238000005276 aerator Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000007084 catalytic combustion reaction Methods 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1493—Selection of liquid materials for use as absorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1425—Regeneration of liquid absorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1487—Removing organic compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
- B01D53/44—Organic components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/84—Biological processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/284—Anaerobic digestion processes using anaerobic baffled reactors
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/286—Anaerobic digestion processes including two or more steps
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
- B01D2252/103—Water
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/702—Hydrocarbons
- B01D2257/7022—Aliphatic hydrocarbons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- General Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Microbiology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Hydrology & Water Resources (AREA)
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- Organic Chemistry (AREA)
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- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention belongs to the technical field of waste gas treatment, and particularly relates to an integrated treatment device for hydrocarbon solvent VOCs waste gas. The system comprises an exhaust gas absorption system, an activated sludge adsorption system, a water-gas separation system, an activated carbon adsorption system, a sewage biodegradation system and a water circulation system. The device comprises an exhaust gas absorption tower, an activated sludge adsorption tank, a gas-water conveying channel communicated with the exhaust gas absorption tower and the activated sludge adsorption tank, a gas-water separation device for entering gas escaping from the activated sludge adsorption tank, an activated carbon adsorption device connected with the gas-water separation device, a microbial degradation device for entering sewage overflowed from the activated sludge adsorption tank through an effluent weir and a circulating water system. The technical scheme provided by the invention integrates the functions of collecting, adsorbing and biologically treating hydrocarbon solvent VOCs waste gas, realizes thorough removal of hydrocarbon VOCs waste gas, adopts a biological treatment technology with low consumption, environmental protection, high efficiency and no secondary pollution, and can realize wide popularization and application.
Description
Technical Field
The invention belongs to the technical field of waste gas treatment, and particularly relates to an integrated treatment device for hydrocarbon solvent VOCs waste gas.
Background
Volatile Organic Compounds (VOCs) waste gas sources are wide, and besides natural sources such as plant volatilization and the like, artificial sources such as various industrial sources, agricultural sources, traffic sources, living sources and the like are included. Most of the organic solvents are volatilized, such as automobile coating, household paint spraying, printing coating and the like. The VOCs waste gas generated in the industrial process has the characteristics of large emission, multiple types, complex components and the like. VOCs waste gas has reduced urban air quality by a wide margin, seriously threatens human life health.
At present, the treatment measures of VOCs waste gas by industrial enterprises at home and abroad can be divided into two types: source control technology and end treatment technology. The source control technology is to replace original and auxiliary materials which are easy to generate VOCs waste gas, and adopt more environment-friendly materials so as to reduce the generation amount of the VOCs, and the method has certain innovation difficulty, and particularly for small-cost enterprises, the scheme of selecting high-environment-friendly and high-quality raw materials is difficult to realize, and the method can reduce the generation amount of the VOCs, but can not completely inhibit the generation of the VOCs; the source control technology also comprises improvement of technology and equipment, and airtight integrated production equipment is adopted for a product production area, so that popularization and application are difficult to realize for industrial enterprises pursuing low cost and high income, and the generated VOCs waste gas is not treated and solved.
VOCs waste gas end treatment technology is divided into a recovery method and an elimination method. Recovery methods include adsorption, condensation, and absorption methods, and elimination methods include combustion, oxidation, low temperature plasma, and biological treatment. The adsorption method and the condensation method have large material consumption and high energy consumption, and the adsorption method cannot be applied to hydrophobic VOCs waste gas; although the combustion method, the oxidation method and the low-temperature plasma method have relatively low energy consumption, byproducts are easy to generate, and secondary pollution is caused to the environment. From the comprehensive situation at home and abroad, the most used VOCs waste gas treatment technology is catalytic combustion, adsorption and biological treatment technology. Because VOCs are various, complex in composition and different in characteristics, the combined treatment technology is adopted in engineering, and the cost is very high.
Disclosure of Invention
The invention provides a hydrocarbon solvent VOCs waste gas integrated treatment system and device, which are used for solving the problems of high cost, high energy consumption, narrow application range, secondary pollution and the like in the existing hydrocarbon solvent VOCs waste gas treatment mode.
In order to solve the technical problems, the technical scheme of the invention is as follows: the hydrocarbon solvent VOCs waste gas integrated treatment system, it includes:
exhaust gas absorption system: absorbing the exhaust gas with water to form sewage and unabsorbed exhaust gas;
activated sludge adsorption system: adsorbing pollutants in waste gas and sewage by using activated sludge;
and a gas-water separation system: the waste gas treatment device is used for further carrying out gas-water separation on waste gas overflowed from the activated sludge adsorption system, and the separated sewage flows back to the waste gas absorption system;
activated carbon adsorption system: the device is used for carrying out active carbon adsorption treatment on the waste gas separated in the gas-water separation system to obtain clean gas for discharge;
sewage biodegradation system: the device is used for carrying out anaerobic and aerobic biodegradation treatment on water coming out of an activated sludge adsorption system;
and (3) a water circulation system: the method is used for recycling water in the system in a wastewater absorption system, an activated sludge adsorption system and a sewage biodegradation system.
The integrated treatment system provided by the invention integrates absorption, adsorption and biodegradation, and water is recycled, so that zero emission of wastewater is realized, and various defects of the existing treatment mode are overcome.
The invention also provides a hydrocarbon solvent VOCs waste gas integrated treatment device, which comprises a waste gas absorption tower, an activated sludge adsorption tank, a gas-water conveying channel communicated with the waste gas absorption tower and the activated sludge adsorption tank, a gas-water separation device for entering gas escaping from the activated sludge adsorption tank, a microbial degradation device connected with the gas-water separation device, and sewage overflowed from the activated sludge adsorption tank and entering through an effluent weir, and a circulating water system, wherein the waste gas absorption tower is divided into an upper gas distribution area and a lower water storage area through a supporting layer, and the circulating water system comprises a first water return system connected with the gas distribution area and the water storage area, a second water return system connected with the gas-water separation device and the water storage area, and a third water return system connected with the microbial degradation device and the water storage area.
Optionally, the waste gas absorption tower comprises an air inlet pipe, an air blower arranged in the air inlet pipe and an air distribution water area connected with the air inlet pipe, wherein a water spray head connected with the water outlet end of the first water return system and air-water contact filler are arranged in the air distribution water area, the air-water contact filler is arranged on the bearing plate, and the water spray head is arranged above the air-water contact filler; the lower part of the water storage area is provided with a water collecting hole connected with the water return end of the first water return system.
Optionally, the waste gas absorption tower is internally divided into a plurality of chambers by a plurality of partition boards from an air inlet to an air outlet in parallel and vertically, and the air-water contact filler is a plurality of perforated swirl plates.
Optionally, a row of through holes are formed in the partition plate, the through holes are round, the diameters of the through holes in the partition plate from the air inlet to the air outlet are increased gradually from small to large, and the through holes in the adjacent partition plates are alternately arranged above the perforated cyclone plate and below the perforated cyclone plate. The G value of the speed gradient for realizing mixing is gradually decreased from large to small, which is favorable for dissolving gas in water and is alternately arranged up and down.
Optionally, the bearing plate is a concave-convex perforated plate. The concave-convex perforated plate can increase the gas-water contact surface.
Optionally, the gas-water conveying channel comprises a gas collecting pipe and a water collecting pipe, the gas collecting pipe collects and guides the gas in the gas distribution water area to the bottom of the activated sludge adsorption tank, and the water collecting pipe guides the sewage in the water storage area to the bottom of the activated sludge adsorption tank.
Optionally, the activated sludge adsorption tank comprises an activated sludge chamber and a mud-water separation chamber, activated sludge is loaded in the activated sludge chamber, a gas distribution hole connected with a gas outlet of a gas-water conveying channel is arranged in the activated sludge, liquid in the activated sludge chamber overflows and flows into the mud-water separation chamber, communicated reflux holes are formed in the bottoms of the activated sludge chamber and the mud-water separation chamber, and precipitated solids return to the activated sludge chamber through the reflux holes.
Optionally, the gas-water separation device is located above the waste gas absorption tower and is provided with a honeycomb inclined tube, the gas-water mixture enters from the bottom of the inclined tube, gas escapes from the upper end of the inclined tube to enter the activated carbon adsorption device, and water flows back to the water return area from the bottom through the inclined tube and the second water return system.
Optionally, the activated carbon adsorption device comprises a drawer type activated carbon box, an exhaust pipe positioned above an air outlet of the activated carbon box and an exhaust fan arranged in the exhaust pipe. The drawer type active carbon box has large specific surface area and strong adsorption of biomass active carbon, and can purify the waste gas escaping from the gas-water separation device.
Optionally, the microbial degradation device comprises an ABR anaerobic treatment tank communicated with the activated sludge adsorption tank, a CSTR aerobic treatment tank arranged behind a process section of the ABR anaerobic treatment tank and a sedimentation tank arranged behind a process section of the CSTR aerobic treatment tank, and a water outlet of the sedimentation tank is connected with a third water return system.
Optionally, the ABR anaerobic treatment tank is 4 anaerobic reaction tanks separated by baffle plates and baffle plates.
Optionally, an aerator pipe is arranged in the CSTR aerobic treatment tank. The ABR anaerobic treatment tank is not aerated, and hydrocarbon solvent VOCs are prevented from volatilizing during aeration.
Optionally, the first water return system comprises a circulating water pipe with the bottom connected to the water storage area and the top connected to the gas distribution area, and the circulating water pipe is provided with a reflux pump.
Optionally, the second water return system comprises a vertical pipe with the upper end connected with the bottom of the gas-water separation device and the lower end arranged at the bottom of the water storage area.
Optionally, the third water return system comprises a water outlet recycling pipe, one end of which is connected with the CSTR aerobic treatment tank, and the other end of which is communicated with the water return area of the waste gas absorption tower.
Optionally, the water replenishing pipe is connected to the first water returning system, and the water replenishing pipe is provided with a ball float valve. The necessary water quantity in the system is ensured by the water supplementing water pipe.
Optionally, the waste gas absorption tower is arranged adjacent to the activated sludge adsorption tank, the gas-water separation device and the activated carbon adsorption device are arranged above the waste gas absorption tower, and the microbial degradation device is arranged around the waste gas absorption tower and the activated sludge adsorption tank.
Optionally, also comprises a device for adding Na 2 CO 3 And the dosing barrel is put into the system and is connected into the first water return system through a negative pressure throat pipe.
According to the technical scheme provided by the invention, the absorption efficiency of VOCs is improved through a perforation rotational flow waste gas collection process, the absorbed VOCs are dissolved in water and degraded by microorganisms, residual VOCs are adsorbed by activated carbon after being subjected to gas-water separation and drying to achieve the effect of efficiently removing hydrocarbon solvent VOCs waste gas, the circulating water system realizes the recycling of clear water and zero discharge standard of waste water, the multifunctional collection, adsorption and biological treatment of hydrocarbon solvent VOCs waste gas are integrated, the thorough removal of hydrocarbon VOCs waste gas is realized, the adopted biological treatment technology is low in consumption, environment-friendly, efficient and free of secondary pollution, and wide popularization and application can be realized.
Drawings
FIG. 1 is a schematic structural view of an embodiment of an integrated hydrocarbon solvent VOCs waste gas treatment device according to the present invention;
FIG. 2 is a schematic diagram showing the relative positions of a microbial degradation apparatus according to an embodiment of the present invention.
The figure shows:
10-waste gas absorption tower, 11-intake pipe, 12-blower, 13-bearing plate, 14-gas distribution water area, 15-water storage area, 16-water spray head, 17-perforated swirl plate, 18-water collecting hole, 191-first partition plate, 192-second partition plate, 193-third partition plate, 194-first through hole, 195-second through hole, 196-third through hole, 20-activated sludge adsorption tank, 21-activated sludge chamber, 22-muddy water separation chamber, 23-gas distribution hole, 24-reflow hole, 25-water outlet weir, 30-gas water conveying channel, 31-gas collecting pipe, 32-water collecting pipe, 40-gas water separation device, 41-first group inclined pipe, 42-second group inclined pipe, 50-activated carbon adsorption device, 51-activated carbon tank, 52-exhaust pipe, 53-exhaust fan, 61-circulation water pipe, 62-reflow pump, 63-standpipe, 64-water outlet recycling pipe, 65-water supplementing pipe, 66-float tank, 70-micro-biodegradation device, 71-first anaerobic reaction tank, 72-second anaerobic reaction tank, 72-third anaerobic reaction tank, 74-anaerobic reaction tank, 75-negative pressure treatment tank, and negative pressure treatment tank, 81-aerobic reaction tank, and four reaction tank, and 80-aerobic reaction tank.
Detailed Description
For ease of understanding, the hydrocarbon solvent VOCs exhaust gas integrated treatment system and apparatus are described below in connection with examples, which are to be understood as merely illustrative of the invention and are not to be construed as limiting the scope of the invention.
The hydrocarbon solvent VOCs waste gas integrated treatment system, it includes:
exhaust gas absorption system: absorbing the exhaust gas with water to form sewage and unabsorbed exhaust gas;
activated sludge adsorption system: adsorbing pollutants in waste gas and sewage by using activated sludge;
and a gas-water separation system: the waste gas treatment device is used for further carrying out gas-water separation on waste gas overflowed from the activated sludge adsorption system, and the separated sewage flows back to the waste gas absorption system;
activated carbon adsorption system: the device is used for carrying out active carbon adsorption treatment on the waste gas separated in the gas-water separation system to obtain clean gas for discharge;
sewage biodegradation system: the device is used for carrying out anaerobic and aerobic biodegradation treatment on water coming out of an activated sludge adsorption system;
and (3) a water circulation system: the method is used for recycling water in the system in a wastewater absorption system, an activated sludge adsorption system and a sewage biodegradation system.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions and positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1 and 2, the hydrocarbon solvent VOCs waste gas integrated treatment apparatus comprises a waste gas absorption tower 10, an activated sludge adsorption tank 20, a gas-water conveying channel 30 communicating the waste gas absorption tower 10 and the activated sludge adsorption tank 20, a gas-water separation device 40 into which gas escaping from the activated sludge adsorption tank 20 enters, an activated carbon adsorption device 50 connected with the gas-water separation device 40, a microbial degradation device 70 into which sewage overflowed from the activated sludge adsorption tank 20 enters through a water outlet weir, and a circulating water system. The waste gas absorption tower 10 is arranged adjacent to the activated sludge adsorption tank 20, the gas-water separation device 40 and the activated carbon adsorption device 50 are arranged above the waste gas absorption tower 10, and the microbial degradation device 70 is arranged around the waste gas absorption tower 10 and the activated sludge adsorption tank 20.
With continued reference to fig. 1, the circulating water system includes a first water return system, a second water return system, and a third water return system. The first water return system comprises a circulating water pipe 61, and the circulating water pipe 61 is provided with a reflux pump 62; the second water return system is a vertical pipe 63, and the third water return system comprises a water outlet recycling pipe 64.
With continued reference to fig. 1, the hydrocarbon solvent VOCs waste gas integrated treatment device further comprises a step of treating Na 2 CO 3 And a dosing barrel 81 put into the system, wherein the dosing barrel 81 is connected into the first water return system through a negative pressure throat 82.
With continued reference to fig. 1, the exhaust gas absorption tower 10 includes an air inlet pipe 11, a blower 12 disposed in the air inlet pipe 11, and a reaction chamber connected to the air inlet pipe 11, wherein the reaction chamber is divided into an upper air-water distribution area 14 and a lower water storage area 15 by a supporting plate 13, a water spray head 16 connected to the water outlet end of a circulating water pipe 81 and an air-water contact filler 17 are disposed in the air-water distribution area 14, the air-water contact filler 17 is disposed on the supporting plate 13, and the water spray head 16 is disposed above the air-water contact filler 17; the lower part of the water storage area 15 is provided with a water collecting hole 18 connected with the water return end of the circulating water pipe 61. The bearing plate 13 is a concave-convex perforated plate, and the air-water contact filler 17 is a plurality of perforated swirl plates.
With continued reference to fig. 1, the reaction chamber is divided into 4 chambers from the air inlet to the air outlet by a first partition 191, a second partition 192 and a third partition 193 in parallel and vertically, a row of first through holes 194 are arranged on the first partition 191 along the in-plane direction, a row of second through holes 194 are arranged on the same second partition 192, a row of third through holes 196 are arranged on the third partition 193, the through holes are round, the diameters of the through holes from left to right gradually increase from small to large, that is, the diameters of the first through holes 194, the second through holes 195 and the third through holes 196 alternately increase, and the through holes on adjacent partitions are alternately arranged above the perforated cyclone plate 17 and below the perforated cyclone plate 17, in the figure, the first through holes 194 are positioned below the perforated cyclone plate 17, the second through holes 195 are positioned above the perforated cyclone plate 17, and the third through holes 196 are positioned below the perforated cyclone plate 17. So that the exhaust gas and the sprayed water can be sufficiently contacted and mixed.
With continued reference to fig. 1, the gas-water conveying channel includes a gas collecting pipe 31 and a water collecting pipe 32, the gas collecting pipe 31 collects and guides the gas in the gas distribution area 14 into the activated sludge adsorption tank 20, and the water collecting pipe 32 guides the sewage in the water storage area 15 into the activated sludge in the activated sludge adsorption tank 20.
With continued reference to fig. 1, the activated sludge adsorption tank 20 includes an activated sludge chamber 21 and a sludge-water separation chamber 22, activated sludge is filled in the activated sludge chamber 21, air distribution holes 23 connected with air outlets of a gas collecting pipe 31 are arranged in the activated sludge, communicated backflow holes 24 are arranged at bottoms of the activated sludge chamber 21 and the sludge-water separation chamber 22, liquid overflowed from the activated sludge enters the sludge-water separation chamber 22, solids in sediment in the sludge-water separation chamber 22 are returned to the activated sludge chamber 21 through the backflow holes 24, and upper-layer liquid enters a subsequent sewage microorganism treatment process.
With continued reference to fig. 1, the gas-water separation device 40 is located above the waste gas absorption tower 10, and is provided with two groups of honeycomb-shaped first group inclined pipes 41 and second group inclined pipes 42 which are separated by a partition board, the gas-water mixture volatilizes from the activated sludge adsorption tank 20, water condensed on part of the inclined pipes flows back to the activated sludge adsorption tank 20, other water which is condensed on the inclined pipes of the first group is wound into the second group inclined pipes 42 from the upper parts of the inclined pipes of the first group 41, water condensed on the inclined pipes of the second group 42 flows back to the water storage area 15 through the vertical pipes 63, and dry gas escapes from the upper ends of the inclined pipes of the second group 42 to enter the activated carbon adsorption device 50.
With continued reference to fig. 1 and 2, the activated carbon adsorption apparatus 50 includes a drawer type activated carbon tank 51, an exhaust pipe 52 positioned above an air outlet of the activated carbon tank 51, and an exhaust fan 53 disposed in the exhaust pipe 52.
Referring to fig. 1 and 2, the microbial degradation apparatus 70 sequentially includes a first anaerobic reaction tank 71, a second anaerobic reaction tank 72, a third anaerobic reaction tank 73, a fourth anaerobic reaction tank 74, an aerobic treatment tank 75 and a sedimentation tank 76, which are separated by a baffle plate and a partition plate, around a circle in a counterclockwise manner, so that sewage sequentially passes through ABR anaerobic treatment, CSTR aerobic treatment and sedimentation processes, overflows from an effluent weir 25 at the upper edge of the mud-water separation chamber 22 to the first anaerobic reaction tank 71, and finally clear water obtained from the sedimentation tank 76 returns to the water storage area 15 through an effluent recycling pipe 64 for recycling.
The ABR anaerobic treatment tank is not aerated, and hydrocarbon solvent VOCs are prevented from volatilizing during aeration. The aerobic treatment tank 75 is provided with an aeration pipe (not shown), and an air pump for delivering air into the aeration pipe and a rotameter for measuring passing gas are arranged on the aeration pipe, wherein the aeration is intermittent aeration for aerobically degrading residual soluble organic matters.
With continued reference to fig. 1, the hydrocarbon solvent VOCs waste gas integrated treatment device further includes a water supplementing pipe 65 connected to the circulating pipe 61, and the water supplementing pipe 65 is provided with a ball float valve 66. The necessary water quantity in the system is ensured by the supplement of tap water.
In order to better explain the whole treatment process, the whole waste gas treatment process is briefly described, firstly, hydrocarbon solvent VOCs waste gas enters a gas-water distribution area 14 through an air inlet pipe 11, water is distributed by a water spray nozzle 16, the waste gas and the water are fully mixed through a perforated rotational flow structure, and the waste water which adsorbs pollutants in the waste gas falls into a water storage area 15 through a gas-water contact filler 17 and a perforated plate 13; on the one hand, the gas which is not adsorbed by water is led into the activated sludge through the gas collecting pipe 32 and is fully mixed with the activated sludge, on the other hand, the sewage in the water storage area 15 is continuously conveyed into the activated sludge through the water collecting pipe 32 at the bottom and is mixed with the activated sludge, and the mixed gas is divided into two parts of gas and liquid again; wherein the gas escapes from the activated sludge, enters the gas-water separation device 40, is further separated into gas and liquid, the liquid flows back to the system, and the gas is further purified by the activated carbon adsorption device 50 and is directly discharged out of the system; the liquid enters the microbial degradation device 70 through the water outlet weir 25, the sewage is purified through anaerobic and aerobic treatment, and the purified water flows back to the system for continuous circulation; meanwhile, the liquid in the water storage area 15 flows back to the water spray head 15 through the circulating water pipe 61 to be continuously mixed with the waste gas, so that the recycling is realized.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting. Although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments may be modified or some or all of the technical features may be replaced with other technical features, which do not depart from the scope of the technical scheme of the embodiments of the present invention.
Claims (5)
1. The hydrocarbon solvent VOCs waste gas integrated treatment device is characterized by comprising a waste gas absorption tower, an activated sludge adsorption tank, a gas-water conveying channel for communicating the waste gas absorption tower with the activated sludge adsorption tank, a gas-water separation device for allowing gas escaping from the activated sludge adsorption tank to enter, a micro-organism degradation device connected with the gas-water separation device, and sewage overflowed from the activated sludge adsorption tank to enter through an effluent weir, and a circulating water system, wherein the waste gas absorption tower is divided into an upper gas distribution water area and a lower water storage area through a bearing plate, and the circulating water system comprises a first water return system for connecting the gas distribution water area with the water storage area, a second water return system for connecting the gas-water separation device with the water storage area, and a third water return system for connecting the micro-organism degradation device with the water storage area;
the waste gas absorption tower comprises an air inlet pipe, an air blower arranged in the air inlet pipe and an air distribution water area connected with the air inlet pipe, wherein a water spray head connected with the water outlet end of the first water return system and air-water contact filler are arranged in the air distribution water area, the air-water contact filler is arranged on a bearing plate, and the water spray head is arranged above the air-water contact filler; the lower part of the water storage area is provided with a water collecting hole connected with the water return end of the first water return system;
the inside of the waste gas absorption tower is divided into a plurality of chambers in parallel and vertically through a plurality of partition boards from an air inlet to an air outlet, a row of through holes are formed in the partition boards, the through holes are round, the diameters of the through holes in the partition boards from the air inlet to the air outlet are gradually increased from small to large, the air-water contact filler is a plurality of perforated cyclone boards, and the through holes in the adjacent partition boards are alternately arranged above the perforated cyclone boards and below the perforated cyclone boards;
the gas-water conveying channel comprises a gas collecting pipe and a water collecting pipe, the gas collecting pipe gathers and guides the gas in the gas distribution area to the bottom of the activated sludge adsorption tank, and the water collecting pipe guides the sewage in the water storage area to the bottom of the activated sludge adsorption tank;
the activated sludge adsorption tank comprises an activated sludge chamber and a sludge-water separation chamber, activated sludge is loaded in the activated sludge chamber, air distribution holes connected with an air outlet of the air-water conveying channel are formed in the activated sludge, communicated backflow holes are formed in the bottoms of the activated sludge chamber and the sludge-water separation chamber, and water outlet weirs are arranged at the tops of the activated sludge chamber and the sludge-water separation chamber.
2. The hydrocarbon solvent VOCs waste gas integrated treatment device according to claim 1, wherein the gas-water separation device is positioned above the waste gas absorption tower and is provided with a honeycomb inclined tube, a gas-water mixture enters from the bottom of the inclined tube, gas escapes from the upper end of the inclined tube to enter the activated carbon adsorption device, and water flows back to the water return area from the bottom through the inclined tube and the second water return system.
3. The hydrocarbon solvent VOCs waste gas integrated treatment device according to claim 1, wherein the activated carbon adsorption device comprises a drawer type activated carbon box, an exhaust pipe positioned above an air outlet of the activated carbon box, and an exhaust fan arranged in the exhaust pipe.
4. The hydrocarbon solvent VOCs waste gas integrated treatment apparatus according to claim 1, wherein the microbial degradation apparatus comprises an ABR anaerobic treatment tank communicated with the activated sludge adsorption tank, a CSTR aerobic treatment tank arranged after a process section of the ABR anaerobic treatment tank, and a sedimentation tank arranged after a process section of the CSTR aerobic treatment tank, and a water outlet of the sedimentation tank is connected with a third water return system.
5. The hydrocarbon solvent VOCs off-gas integrated treatment device of claim 1, further comprising a device for treating Na 2 CO 3 And the dosing barrel is put into the system and is connected into the first water return system through a negative pressure throat pipe.
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