CN113828118A - Waste gas collecting and treating device and method - Google Patents
Waste gas collecting and treating device and method Download PDFInfo
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- CN113828118A CN113828118A CN202111228008.XA CN202111228008A CN113828118A CN 113828118 A CN113828118 A CN 113828118A CN 202111228008 A CN202111228008 A CN 202111228008A CN 113828118 A CN113828118 A CN 113828118A
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- 239000002912 waste gas Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000001179 sorption measurement Methods 0.000 claims abstract description 149
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 107
- 238000005406 washing Methods 0.000 claims abstract description 38
- 238000003795 desorption Methods 0.000 claims abstract description 25
- 239000007789 gas Substances 0.000 claims description 147
- 239000010865 sewage Substances 0.000 claims description 46
- 239000012071 phase Substances 0.000 claims description 45
- 239000007788 liquid Substances 0.000 claims description 41
- 238000012545 processing Methods 0.000 claims description 32
- 239000007791 liquid phase Substances 0.000 claims description 20
- 238000003860 storage Methods 0.000 claims description 16
- 238000000926 separation method Methods 0.000 claims description 14
- 238000007599 discharging Methods 0.000 claims description 13
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- 238000000746 purification Methods 0.000 claims description 11
- 238000011084 recovery Methods 0.000 claims description 9
- 230000007246 mechanism Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 14
- 235000019198 oils Nutrition 0.000 description 14
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- 238000010586 diagram Methods 0.000 description 7
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- 239000002351 wastewater Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 5
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- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
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- 229920002396 Polyurea Polymers 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000002199 base oil Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 231100000357 carcinogen Toxicity 0.000 description 1
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- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 description 1
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- 230000001172 regenerating effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
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- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
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Images
Classifications
-
- 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
- B01D53/02—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
- B01D53/04—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 with stationary adsorbents
- B01D53/0407—Constructional details of adsorbing systems
-
- 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
- B01D53/04—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 with stationary adsorbents
- B01D53/0454—Controlling adsorption
-
- 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
- B01D53/26—Drying gases or vapours
-
- 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
-
- 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
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
- B01D2259/4009—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating using hot gas
Abstract
The invention relates to a waste gas collecting and treating device and a method, wherein the waste gas collecting and treating device comprises a pretreatment unit, a water washing unit, a gas-water separator, at least one adsorption tank and an emptying device. According to the invention, the adsorption tank and the emptying device are arranged, and the adsorption layer is arranged in the adsorption tank, so that the air components which are difficult to adsorb in the waste gas are separated from the air components which are easy to adsorb through the adsorption layer, and the effect of purifying the air is achieved. Through setting up steam conduit and being connected with steam air source and adsorption tank, and then can be right the adsorption tank carries out the desorption, and then reaches the effect that desorption material was taken out in the adsorbed layer.
Description
Technical Field
The invention relates to the technical field of environment-friendly equipment, in particular to a waste gas collecting and treating device and method.
Background
The atmospheric pollution situation in China is severe, the regional atmospheric environment problem taking inhalable particles (PM10) and fine particles (PM2.5) as characteristic pollutants is increasingly prominent, the health of people is damaged, and the social harmony and stability are influenced. Volatile Organic Compounds (VOCs) are highly volatile, special-smelling, irritating, toxic organic gases, and some have been classified as carcinogens, such as vinyl chloride, benzene, polycyclic aromatic hydrocarbons, etc.
At present, volatile gas is generated in the production process of grease workshops, special grease workshops, brake fluid workshops, sol workshops, quality inspection buildings, tank areas, hazardous waste warehouses, loading and unloading facilities and sewage treatment facilities, for example, the waste gas generated in the production process of lithium-based, extreme pressure lithium-based and lithium complex greases is hydrocarbon and acid light component waste gas; hydrocarbon waste gas and stink gas can be generated in the production process of the calcium-based grease; hydrocarbon and phenol waste gases are generated in the production process of the composite calcium sulfonate lubricating grease; hydrocarbon, amine and alcohol waste gases are generated in the production process of the polyurea lubricating grease; hydrocarbon and acid light component waste gas can be generated in the production process of the white grease; hydrocarbon light component waste gas is generated in the production process of the bentonite grease; the saturated vapor pressure of the oil tank for storing the raw materials of alcohols, ethers and base oils exceeds the limit value.
The volatile gas is mainly generated by concentrating the storage and volatilization loss of the organic liquid, the diffusion in the processes of collecting, transporting, storing and treating waste water, the volatilization loss in the process of loading and unloading the organic liquid and the like, so that the design of equipment capable of carrying out concentrated treatment and treatment on the waste gas is urgently needed.
Disclosure of Invention
In view of the above-mentioned shortcomings in the prior art, it is an object of the present invention to provide an exhaust gas collection and treatment device and method to solve one or more problems in the prior art.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the exhaust gas treatment device comprises
A pre-treatment unit for regulating the flow of a gaseous medium;
the water washing unit is provided with a first inlet and is connected with the pretreatment unit, and the water washing unit is used for collecting the gas medium and realizing primary purification of the gas medium;
a gas-water separator, having a portion connected to the first outlet of the water washing unit, for collecting the primary purified gas medium and separating it into a primary gas phase and a primary liquid phase;
at least one adsorption tank, wherein the adsorption tank is provided with a first part which is connected with the other part of the gas-water separator and is used for adsorbing the primary gas phase through the adsorption tank and purifying the primary gas phase;
and the emptying device is connected with the adsorption tank and is used for discharging the purified primary gas phase to the outside.
Further, the waste gas collecting and processing device further comprises at least one steam pipeline, one part of the steam pipeline is connected with the adsorption tank, and the other part of the steam pipeline is connected with a steam gas source to be used for desorbing the adsorption tank and forming a secondary gas phase and a secondary liquid phase in the adsorption tank.
Further, the waste gas collecting and processing device further comprises a liquid discharging structure, and one part of the liquid discharging structure is connected with the adsorption tank to discharge the secondary liquid phase.
Furthermore, the waste gas collecting and processing device also comprises a heat exchanger, one part of the heat exchanger is connected with the pretreatment unit through a steam recovery pipeline, and the other part of the heat exchanger is connected with the adsorption tank.
Furthermore, the waste gas collecting and processing device further comprises an air purging pipeline, one part of the air purging pipeline is connected with the adsorption tank, and the other part of the air purging pipeline is connected with a gas source. The waste gas collecting and processing device further comprises a sewage pipe, and the sewage pipe is connected with the third part of the storage tank, the gas-water separator, the water washing unit and the circulating processing unit respectively.
Further, the waste gas collecting and processing device further comprises a storage tank, the storage tank is provided with a first portion connected with the heat exchanger, and the storage tank is provided with a second portion connected with the steam recovery pipeline.
Furthermore, the pretreatment unit comprises at least one gas pipeline, and at least one gas discharge mechanism and at least one pressure sensor are respectively arranged on the gas pipeline.
Further, the waste gas collecting and processing device further comprises a circulating processing unit, the circulating processing unit is provided with a first part connected with a water source, the circulating processing unit is provided with a second part connected with a second outlet of the water washing unit, and the circulating processing unit is also provided with a third part connected with a second inlet of the water washing unit.
The method for treating the waste gas by using the waste gas collecting and treating device comprises the following steps:
introducing an exhaust gas;
washing with water: washing the waste gas to further realize primary purification of the waste gas;
gas-water separation: separating primary gas phase and primary liquid phase from the primary purified waste gas;
adsorption: and adsorbing and purifying the primary gas phase through an adsorption tank and discharging the purified gas phase to the outside.
Further, the method for treating the exhaust gas by using the exhaust gas collecting and treating device further comprises the following steps:
desorption: forming a secondary gas phase and a secondary liquid phase in the adsorption tank by using steam;
heat exchange: the secondary gas phase is subjected to heat exchange through a heat exchanger and forms a tertiary gas phase and a tertiary liquid phase.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention has the advantages that the adsorption tank and the emptying device are arranged, the adsorption layer is arranged in the adsorption tank, the air components which are difficult to adsorb in the waste gas are separated from the air components which are easy to adsorb through the adsorption layer, so that the effect of purifying the air is achieved, and the purified air can be further discharged to the outdoor after reaching the discharge standard, so that the requirement of environmental protection is met.
(two) further, be connected with steam air supply and adsorption tank through setting up steam conduit, and then can be right the adsorption tank carries out the desorption, and then reaches desorption material and is taken out in the adsorbed layer, further carries out purification treatment, high-efficient reliable to this desorption material simultaneously.
And furthermore, the automatic valve assembly can ensure the internal pressure of each adsorption tank to be in compliance, and safety accidents caused by over-standard pressure are avoided.
And (IV) further, oily sewage generated during washing and condensate oily wastewater generated during desorption can be further discharged through a sewage main pipe, so that the device is environment-friendly and reliable.
Drawings
FIG. 1 is a schematic structural diagram of a pretreatment unit in the exhaust gas collection and treatment device and method according to the embodiment of the invention.
FIG. 2 is a schematic structural diagram of a water washing unit in the exhaust gas collecting and treating device and method according to the embodiment of the invention.
Fig. 3 is a schematic structural diagram of an adsorption vapor desorption device in the exhaust gas collection and treatment device and method according to the embodiment of the invention.
Fig. 4 is a schematic structural diagram of an internal adsorption unit in the exhaust gas collection and treatment device and method according to the embodiment of the invention.
Fig. 5 shows a schematic structural diagram of a part of a desorption unit in the exhaust gas collection and treatment device and method according to the embodiment of the invention.
Fig. 6 shows another schematic structural diagram of a part of the desorption unit in the exhaust gas collection and treatment device and method according to the embodiment of the invention.
FIG. 7 is a schematic structural diagram of a pretreatment unit in the exhaust gas collection and treatment device and method according to the embodiment of the invention.
In the drawings, the reference numbers: 1. a pre-processing unit; 100. a first pressure sensor; 101. a first angle valve; 102. a first butterfly valve; 103. a first fan; 104. a second butterfly valve; 105. a second pressure sensor; 106. a second angle valve; 107. a first gas line; 108. a second gas line; 109. a third butterfly valve; 110. a second fan; 111. a fourth butterfly valve; 20. a water washing unit; 2000. washing the tower body with water; 200. a first outlet; 201. a first inlet; 202. a second inlet; 203. a second outlet; 204. a first liquid level high limit indicator; 205. a first level transmitter; 206. a second liquid level limit indicator; 207. a third outlet; 208. a first water outlet pipeline; 209. a first drain pipe; 2010. a ball valve; 21. a circulation processing unit; 210. a first liquid level switch; 211. a first liquid level indicator; 212. a second liquid level transmitter; 213. a first liquid level recorder; 214. a second sewage draining pipe; 215. an oil separating groove; 216. a third blow-off pipe; 217. a first water replenishing pipe; 218. a fifth butterfly valve; 219. a first pump; 2110. a sixth butterfly valve; 2111. a second pump; 2112. a second water replenishing pipe; 2113. a seventh butterfly valve; 2114. a first water inlet pipeline; 300. a first gas path; 301. a first adsorption tank; 302. a first on-off valve; 303. a second on-off valve; 304. a third on-off valve; 305. evacuating the line; 3051. an evacuation device; 306. a first safety valve; 307. a fourth switching valve; 308. a steam discharge pipe; 3091. a first emptying branch; 3092. a second drain branch; 3010. a first adsorbent layer; 310. a master control circuit; 311. a first temperature detector; 312. a first temperature indicating switch; 313. a first control branch; 314. a pressure detector; 315. a first pressure indicating switch; 316. a second control branch; 320. a first steam line; 321. a second steam line; 322. a fifth on-off valve; 323. a sixth switching valve; 324. a third pressure sensor; 325. a steam pipe branch; 326. a second adsorption tank; 327. a seventh on-off valve; 328. an eighth on-off valve; 330. a fourth blow-off pipe; 331. a third relief valve; 332. a ninth on-off valve; 333. a third angle valve; 334. a fourth angle valve; 335. a first blowdown branch; 336. a second blowdown branch; 337. a third blowdown branch; 340. an air line; 341. a tenth switching valve; 342. compressing air; 343. an air purge line; 350. a second gas path; 351. an eleventh switching valve; 352. a twelfth switching valve; 353. a thirteenth switching valve; 354. a fourteenth switching valve; 355. a fourth relief valve; 356. a fifteenth switching valve; 40. a gas-water separator; 400. a fifth angle valve; 401. a fifth sewage draining pipe; 402. a pressure temperature sensor; 403. a second pressure indicating switch; 404. a gas phase collection line; 50. a heat exchanger; 501. a first circulating water inlet pipeline; 502. a first circulating water outlet pipeline; 503. a vapor recovery line; 60. a storage tank; 600. a second liquid level switch; 601. a second liquid level indicator; 602. a third level transmitter; 603. a second liquid level recorder; 70. a main sewage pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following describes in detail the exhaust gas collecting and treating device and method according to the present invention with reference to the accompanying drawings and the detailed description. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise scale for the purpose of facilitating and distinctly aiding in the description of the embodiments of the present invention. To make the objects, features and advantages of the present invention comprehensible, reference is made to the accompanying drawings. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the implementation conditions of the present invention, so that the present invention has no technical significance, and any structural modification, ratio relationship change or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention.
The specific structure of the waste gas collecting and treating device is as follows:
referring to fig. 1, the exhaust gas treatment device includes a pretreatment unit 1, and the pretreatment unit 1 is used for adjusting the flow rate of a gas medium, i.e., an introduced exhaust gas.
Further, with reference to fig. 1, the preprocessing unit includes at least one gas pipeline, and at least one gas discharge mechanism and at least one pressure sensor are respectively disposed on the gas pipeline.
Specifically, in the exhaust gas collecting and processing device according to the first embodiment of the present invention, the exhaust gas is introduced through the first gas pipeline 107, preferably, the gas discharging mechanism is the first fan 103, and the first pressure sensor 100 is connected to the first gas pipeline 107 and further has the first angle valve 101. At the inlet of the first fan 103, a first butterfly valve 102 is provided in a first air line 107. At the outlet of said first fan 103, a second butterfly valve 104 is arranged in the first gas line 107, and said first pressure sensor 100 is used to test the pressure in the first gas line 107 before the flow of unregulated exhaust gas.
Further, with continued reference to fig. 1, in order to ensure that the first fan 103 can also adjust the flow rate of the introduced exhaust gas when the first fan is out of operation, a second gas pipeline 108 is further connected in parallel to the first gas pipeline 107, a second fan 110 is disposed on the second gas pipeline 108, and similarly, a third butterfly valve 109 is disposed on the second gas pipeline 108 at an inlet of the second fan 110. At the outlet of the second fan 110, a fourth butterfly valve 111 is disposed on the second gas pipe 108.
Further, referring to fig. 1, fig. 2 and fig. 7, a second angle valve 106 and a second pressure sensor 105 are respectively disposed at the tail of the first gas pipeline 107, and the second pressure sensor 105 is used for testing the pressure in the first gas pipeline 107 with the regulated exhaust gas flow.
The water washing unit 20 is provided with a first inlet 201 and is connected with the pretreatment unit 1, and the water washing unit 20 is used for collecting the waste gas and realizing primary purification of a gas medium;
referring to fig. 2, the washing unit 20 includes a washing tower body 2000, the height of the washing tower body 2000 is 8500 mm-11500 mm, a plurality of trays are provided inside the washing tower body 2000, and in the exhaust gas collecting and treating device of the present embodiment, the number of the trays is 18, which can greatly improve the washing efficiency.
Further, with reference to fig. 2, the washing tower body 2000 is connected to a first liquid level high limit indicator 204, a first liquid level transmitter 205 and a second liquid level limit indicator 206, respectively, and the first liquid level high limit indicator 204 and the second liquid level limit indicator 206 are installed at different heights.
Further, with continued reference to fig. 2 and fig. 7, the water scrubber body 2000 has a first outlet 200, a first inlet 201, a second inlet 202, a second outlet 203, and a third outlet 207. Wherein the first outlet 200 is connected with the gas-water separator 40 through a pipeline, and the first inlet 201 is connected with the tail part of the first gas pipeline 107. And the second inlet 202 and the second outlet 203 are used for connecting with the circulation treatment unit 21.
Further, with continued reference to fig. 2 and 7, the third outlet 207 of the water washing tower body 2000 is used for discharging the unusable water, the third outlet 207 is connected to the sewage main pipe 70 through a first sewage discharge pipe 209, a ball valve 2010 is further disposed on the first sewage discharge pipe 209, and the first sewage discharge pipe 209 is used for discharging the washed sewage containing water.
Specifically, with continued reference to fig. 2, the loop processing unit 21 has the following specific structure:
the circulation processing unit 21 includes an oil separation tank 215, the oil separation tank 215 is made of carbon steel, a first inlet end of the oil separation tank 215 is connected to a water source through a first water inlet pipe 2114, a water inlet valve is disposed on the first water inlet pipe 2114, and a second inlet end of the oil separation tank 215 is connected to the second outlet 203 of the water scrubber body 2000 through a first water outlet pipe 208, so as to collect a liquid phase, which is generated during primary purification, of the gas medium and entrained by the grease.
Further, with continuing reference to fig. 2, the oil separation tank 215 further has a first outlet 200 connected to one end of the first water replenishing pipe 217, and the other end of the first water replenishing pipe 217 is connected to the second inlet 202 of the water scrubber body 2000, so that when the first liquid level transmitter 205 on the water scrubber body 2000 measures that the amount of water inside the water scrubber body 2000 is too small, the usable water after filtering grease in the oil separation tank 215 is replenished into the water scrubber body 2000 through the first water replenishing pipe 217, thereby realizing the circulating replenishment of the usable water inside the water scrubber body 2000. The first water replenishing pipe 217 is further provided with a first pump 219, and at the inlet end and the outlet end of the first pump 219, the first water replenishing pipe 217 is further provided with fifth butterfly valves 218, so that the water amount of the inlet and the outlet ends of the first pump 219 can be opened and closed through the two fifth butterfly valves 218, and the purpose of controlling the water amount is achieved.
Similarly, with continued reference to fig. 2, in order to ensure that the first pump 219 can also supply water to the interior of the water scrubber body 2000 when the first pump 219 fails, the first water supply pipe 217 is further connected in parallel with a second water supply pipe 2112, the second water supply pipe 2112 is also provided with a second pump 2111, similarly, the inlet end and the outlet end of the second pump body 2111 are also provided with sixth butterfly valves 2110 on the second water supply pipe 2112, and the water amount at the inlet end and the outlet end of the first pump 219 can be opened and closed by the two sixth butterfly valves 2110, so as to achieve the purpose of controlling the water amount.
Further, with continuing reference to fig. 2, the oil-separating tank 215 is further connected to the main sewage pipe 70 via a second sewage pipe 214 and a third sewage pipe 216, wherein a seventh butterfly valve 2113 is further disposed on the third sewage pipe 216 for controlling the discharge flow of the unusable water.
Further, please refer to fig. 2, in order to check the liquid level flow and control the liquid level of the oil separation tank 215 in real time, a first liquid level switch 210, a first liquid level indicator 211, a second liquid level transmitter 212, and a first liquid level recorder 213 are further disposed on the oil separation tank 215, the first liquid level recorder 213 is configured to monitor the liquid level in the oil separation tank 215, and further control the water inlet valve to open to replenish water when the liquid level in the oil separation tank 215 is low, and the water replenishment is stopped after the water replenishment reaches a certain liquid level, thereby ensuring that the circulating water is periodically drained and replenished.
Referring to fig. 2 and 7, the waste gas collecting and processing apparatus of the present invention further includes a gas-water separator 40, wherein an inlet end of the gas-water separator 40 is connected to the first outlet 200 of the water scrubber body 2000 through a gas phase collecting pipeline 404, so as to collect the primary purified gas medium and separate the primary purified gas medium into a primary gas phase and a primary liquid phase. Specifically, the gas-water separator 40 is mainly used for improving the drying degree of the steam and reducing the water carrying phenomenon of the steam.
Further, with reference to fig. 7, a pressure and temperature sensor 402 and a second pressure indicating switch 403 are disposed on the gas-water separator 40, the pressure and temperature sensor 402 detects the temperature of the primary gas phase inside the gas-water separator 40, and the pressure index of the primary gas phase inside the gas-water separator 40 is fed back according to the second pressure indicating switch 403.
Similarly, the primary liquid phase separated in the gas-water separator 40 is connected to the sewage main pipe 70 through a fifth sewage drain pipe 401, thereby realizing the discharge of sewage. Meanwhile, a fifth angle valve 400 is also arranged on the fifth sewage draining pipe 401 to control the opening and closing of the fifth sewage draining pipe 401.
In order to realize that the primary gas phase can be discharged to the outside after reaching the discharge standard after adsorption, the waste gas collecting and processing device also comprises at least one adsorption tank. Referring to fig. 3, 4 and 7, in the exhaust gas collecting and treating apparatus according to the present invention, the adsorption tanks are specifically configured as a first adsorption tank 301 and a second adsorption tank 326.
Further, referring to fig. 3 and 4, the inlet end of the first canister 301 is connected to the first gas path 300, and a first on-off valve 302 is provided on the first gas path 300. Specifically, the first adsorption tank 301 is internally provided with at least one first adsorption layer 3010, and the thickness of the first adsorption layer 3010 is; preferably, the first adsorption layer 3010 in the first adsorption tank 301 is provided in two stages, and the two stages of first adsorption layers 3010 are distributed in the upper and lower stages in the first adsorption tank 301, wherein the second on-off valve 303 is provided on the outer side of the first adsorption tank 301 at the position corresponding to the first adsorption layer 3010 in the upper stage, and similarly, the third on-off valve 304 is provided on the outer side of the first adsorption tank 301 at the position corresponding to the first adsorption layer 3010 in the lower stage, and the first adsorption layer is preferably an activated carbon layer, the height of the first adsorption tank 301 is preferably 6500mm, and the first adsorption tank 301 adsorbs organic solutes in a gas phase to be treated in a fixed bed manner by using granular activated carbon, thereby purifying the gas phase once.
With continuing reference to fig. 3 and fig. 4, the gas phase obtained after the secondary purification needs to be discharged to the outside, so that a first emptying branch 3091 is further connected to the first adsorption tank 301 near each first adsorption layer 3010, the first emptying branch 3091 has two inlet ends respectively connected to the upper layer and the lower layer of the first adsorption tank 301, the outlet end of the first emptying branch 3091 is connected to the evacuation pipe 305, and the tail of the evacuation pipe 305 is connected to the evacuation device 3051, so that the gas phase obtained after the secondary purification after the adsorption treatment can be discharged to the outside through the evacuation device 3051 after reaching the discharge standard.
Further, with continued reference to fig. 3 and 4, a first relief valve 306 is further provided on the first adsorption tank 301, and the first relief valve 306 is used to control the gas pressure in the first adsorption tank 301 not to exceed a prescribed value.
Further, referring to fig. 3 and 5, in order to desorb the components adsorbed on the first adsorption layer 3010 in the first adsorption tank 301, the substances attached on the first adsorption layer 3010 are removed, so as to achieve the purpose of separating, purifying and regenerating the adsorbent. The first adsorption tank 301 is further connected with a steam assembly, the steam assembly includes a first steam pipeline 320 and a second steam pipeline 321, the first steam pipeline 320 and the second steam pipeline 321 are both connected with a steam air source, the first steam pipeline 320 and the second steam pipeline 321 are both connected with the upper layer and the lower layer of the first adsorption tank 301, the first steam pipeline 320 is provided with a third pressure sensor 324 and a sixth switch valve 323, and the second steam pipeline 321 is provided with a seventh switch valve 327.
Correspondingly, when the number of the first adsorption layers 3010 in the first adsorption tank 301 increases, the number of the steam pipelines increases correspondingly, and the second adsorption tank 326 also increases, which is not further described herein.
Further, referring to fig. 3 and 7, after the high-temperature steam enters the first adsorption tank 301 for desorption, the steam inside the first adsorption tank 301 contains lipid substances, and the steam enters the heat exchanger 50 through the steam discharge pipe 308, wherein the inlet end of the heat exchanger 50 is connected to the first circulating water inlet pipeline 501, the wide end of the heat exchanger 50 is connected to the first circulating water outlet pipeline 502, so as to condense the circulating water with different temperature and form an oil-water mixture and steam inside the heat exchanger 50, wherein because the heat exchanger 50 is connected to one end of the steam recovery pipeline 503, the other end of the steam recovery pipeline 503 is connected to the first gas pipeline 107, so that the steam can be conveyed to the first gas pipeline 107 again and be sent to the water scrubber body 2000 again for water scrubbing, and then enter the gas-water separator 40 to form a liquid state and a gas state, and then enter the adsorption tank again for discharge, the circulation is carried out until the gas phase reaches the standard and can be discharged.
Further, referring to fig. 3, 5 and 6, in order to ensure that the pressure of the steam inside the first adsorption tank 301 is in compliance, to make the pressure inside the first adsorption tank 301 balanced when the first safety valve 306 discharges the steam, and to avoid safety accidents caused by excessive pressure, an automatic valve assembly is further disposed on the first adsorption tank 301, and the automatic valve assembly is configured to monitor the pressure indicator inside the first adsorption tank 301 in real time.
Specifically, referring to fig. 3 and fig. 6, the automatic valve assembly includes an eighth switch valve 328 disposed on the first steam pipeline 320, and a ninth switch valve 332 disposed on the second steam pipeline 321, the eighth switch valve 328 and the ninth switch valve 332 are respectively connected to the master control circuit 310 through a first control branch 313, one end of the master control circuit 310 is connected to the fourth switch valve 307, and the other end of the master control circuit 310 is connected to the tenth switch valve 341.
Further, referring to fig. 3, the tenth switch valve 341 is disposed on an air purge line 343, the air purge line 343 is connected to the bottoms of the first adsorption tank 301 and the second adsorption tank 326, respectively, and the air purge line 343 is used for introducing compressed air 342.
Further, with continuing reference to fig. 3 and fig. 6, the first control branch 313 is provided with a first temperature detector 311 and a first temperature indication switch 312, respectively, and the first temperature detector 311 and the first temperature indication switch 312 are provided in the upper first adsorption layer 3010 and the lower first adsorption layer 3010 of the first adsorption tank 301, respectively, for monitoring the temperatures of the upper and lower adsorption layers and for controlling the opening and closing of the eighth switch valve 328 and the ninth switch valve 332, so as to ensure that the tenth switch valve 341 also opens the compressed air 342 while the fourth switch valve 307 is opened, so as to keep the interior of the first adsorption tank 301 dry.
Further, with continuing reference to fig. 3 and fig. 6, the general control circuit 310 is further connected to one end of a second control branch 316, and the second control branch 316 is provided with a pressure detector 314 and a first pressure indication switch 315, so as to detect a pressure index inside the first adsorption tank 301.
Further, please refer to fig. 3, fig. 6 and fig. 7 continuously, when steam is sent into the first adsorption tank 301 during desorption, a secondary liquid phase is generated, in order to discharge the liquid phase, a liquid discharge structure is also arranged at the tail of the first adsorption tank 301, the liquid discharge structure includes a fourth sewage discharge pipe 330, the fourth sewage discharge pipe 330 is connected with a third safety valve 331, similarly, the fourth sewage discharge pipe 330 is respectively connected with a first sewage discharge branch 335 and a second sewage discharge branch 336, wherein the first sewage discharge branch 335 is connected in parallel with the second sewage discharge branch 336, the end of the second sewage discharge branch 336 is connected with the third sewage discharge branch 337, and the third sewage discharge branch 337 is connected with the sewage main pipe 70. Wherein a fourth angle valve 334 is disposed on the first sewage branch 335, and a ninth on-off valve 332 and a third angle valve 333 are disposed on the second sewage branch 336.
Correspondingly, referring to fig. 4, in order to ensure that the first adsorption tank 301 is switchable after adsorption saturation, the exhaust gas collection and treatment apparatus according to the embodiment of the present invention further includes a second adsorption tank 326, the second adsorption tank 326 is also connected to the automatic valve assembly and the steam pipeline, the second adsorption tank 326 is also provided with two outlet ends connected to a second exhaust branch 3092, the second exhaust branch 3092 is also connected to the exhaust pipeline 305, and further, the purified gas can be exhausted through the exhaust apparatus 3051 by adsorption, wherein a twelfth switching valve 352 and a fourteenth switching valve 354 are further respectively provided at the connection positions of the second exhaust branch 3092 and the upper layer and the lower layer of the second adsorption tank 326, a fourth safety valve 355 and an eleventh switching valve 351 are respectively connected to the top of the second adsorption tank 326, and similarly, an inlet of the second adsorption tank 326 is connected to the first gas circuit 300 by a second gas circuit 350, and a thirteenth switching valve 353 is also provided on the second air path 350.
Referring to fig. 5, the steam pipeline for performing temperature swing adsorption on the second adsorption tank 326 includes two steam pipe branches 325, one steam pipe branch 325 is connected to the first steam pipe 320, the other steam pipe branch 325 is connected to the second steam pipe 321, and similarly, the steam pipe branches 325 are respectively provided with a switch valve (shown in fig. 5 but not labeled), which functions as the switch valve on the first adsorption tank 301.
Further, referring to fig. 6, the second adsorption tank 326 also has a pipeline for connecting the compressed air 342, the connection mode of the pipeline is the same as that of the first adsorption tank 301, another liquid discharge structure completely the same as that of the first adsorption tank 301 is also provided on the second adsorption tank 326, and the liquid discharge device is finally connected with the sewage main pipe 70 through a third sewage branch 337, which is not further described herein.
Further, referring to fig. 7, the waste gas collecting and treating apparatus of the present invention further includes a storage tank 60, wherein an inlet end of the storage tank 60 is connected to the heat exchanger 50, the storage tank 60 has two outlet ends, one of the outlet ends is connected to a vapor recovery pipeline 503 for receiving the vapor phase generated in the storage tank 60 and performing a recycling treatment again, and the other outlet end is connected to a sewage main 70 for discharging waste water.
Further, referring to fig. 7, in order to perform liquid level detection, control and recording, the storage tank 60 is further provided with a second liquid level switch 600, a second liquid level indicator 601, a third liquid level transducer 602 and a second liquid level recorder 603, respectively.
Correspondingly, the invention also provides a treatment method of the wastewater collection treatment device, which comprises the following specific processes:
s1: referring to fig. 1 and 7, exhaust gas is introduced: the first butterfly valve 102 and the second butterfly valve 104 are opened, and the exhaust gas is introduced into the water washing unit 20 through the first gas line 107 by the first fan 103.
S2: referring to fig. 2 and 7, water washing: waste gas introduces inside washing unit 20 back gets into washing tower body 2000 through first import 201, makes through the inside packing layer of washing tower body 2000 with water countercurrent fully contact for soluble gas in the waste gas and smuggleing lipid and water absorption treatment secretly, and then has realized the purification of waste gas.
S3: with continued reference to fig. 2 and 7, gas-water separation: the exhaust gas is primarily purified and then sent to a gas-water separator 40 through a first outlet 200 via a pipeline, the gas-water separator 40 is used for collecting the primarily purified gas medium and separating the primarily purified gas medium into a primary gas phase and a primary liquid phase, please refer to fig. 3 and 7, wherein the primary gas phase enters a first adsorption tank 301 through a first gas path 300, and the primary liquid phase is discharged to a sewage main 70 through a fifth sewage discharge pipe 401.
S4: referring to fig. 3, 4 and 7, adsorption: before adsorption, the first adsorption tank 301 is used as a main tank, and the second adsorption tank 326 is used as a standby tank and is closed, wherein the first switching valve 303, the second switching valve 302 and the third switching valve 304 in the first adsorption tank 301 are all in an open state, and the fourth switching valve 307, the fifth switching valve 322 and the tenth switching valve 341 are all closed. Similarly, referring to fig. 4, the thirteenth switching valve 353, the fourteenth switching valve 354 and the fifteenth switching valve 356 on the spare tank 326 are also in a closed state.
Further, with continued reference to fig. 3 and 4, after the first on-off valve 302 is opened, the primary gas phase is delivered to the inside of the first adsorption tank 301 from the first gas path 300, the organic solute in the primary gas phase is absorbed by the first adsorption layer 3010 through the two-stage first adsorption layer 3010 inside the first adsorption tank 301, so that the primary gas phase is secondarily purified to form a secondary gas phase, and the secondary gas phase reaches the discharge standard after being purified, and enters the first emptying branch 3091 through the opened second on-off valve 303 and the opened third on-off valve 304, and since the first emptying branch 3091 is connected to the emptying pipe 305, the gas phase reaching the discharge standard after being purified is sent to the emptying device 3051 through the emptying pipe 305, so that the gas phase is discharged to the outside.
Correspondingly, the whole exhaust gas collecting and processing device can perform steam desorption at each time through PLC setting, wherein each desorption is performed for 4 hours, and the desorption is performed for 8 hours after the desorption is completed, and specifically, the compressed air 342 enters the first adsorption tank 301 or the second adsorption tank 326 through an air purging pipeline 343 and an air pipeline 340 for purging, wherein the air purging pipeline 343 is connected with the air pipeline 340.
Specifically, when the first adsorption tank 301 is undergoing desorption, the second adsorption tank 326 performs adsorption operation, and referring to fig. 3 and 5, the first switching valve 302, the second switching valve 303, and the third switching valve 304 are first closed, and then both the fifth switching valves 322 of the upper layer and the lower layer of the first adsorption tank 301 are opened. When the pressure of the first adsorption tank 301 is greater than or equal to 0.09MPa, the two fifth switching valves 322 are closed, and the safety of the first adsorption tank 301 is ensured. And when the pressure of the first adsorption tank 301 is less than or equal to 0.05MPa, opening the two fifth switch valves 322 to further ensure that the temperature of the first adsorption layer 3010 in the first adsorption tank 301 is raised, and when the temperature of the first adsorption layer 3010 on the upper layer is raised to 105 ℃, timing for 2h and then closing one of the fifth switch valves 322. Similarly, when the temperature of the first adsorption layer 3010 in the lower layer rises to 105 ℃, the timer 2h is started, and then the fifth on-off valve 322 in the lower layer is closed.
Further, with reference to fig. 3, after the two fifth on-off valves 322 are opened for 10min, the ninth on-off valve 332 is opened, the desorption process is ended, and then the ninth on-off valve 332 is closed.
Further, when the pressure of the first adsorption tank 301 is greater than or equal to 0.08MPa, the fourth switch valve 307 is opened to exhaust gas, so that the safety of the first adsorption tank 301 is ensured. On the contrary, when the pressure of the first adsorption tank 301 is less than or equal to 0.05MPa, the fourth switch valve 307 is closed to ensure that the temperature of the first adsorption layer 3010 rises until the temperatures of the upper and lower first adsorption layers 3010 rise to 105 ℃, and the fourth switch valve 307 is continuously opened to ensure that the desorbed substances of the first adsorption layer 3010 and the high-temperature steam are carried away.
Further, heat exchange: referring to fig. 7, the high-temperature steam (secondary gas phase) with the desorbed substances is discharged from the steam discharge pipe 308 to the heat exchanger 50, the circulating water exchanges heat inside the heat exchanger 50 through the first circulating water inlet pipeline 501 and the first circulating water outlet pipeline 502, the tertiary gas phase formed after heat exchange enters the first gas pipeline 107 of the pretreatment unit through the steam recovery pipeline 503 again, and then enters the adsorption tank for adsorption purification after water washing and gas-water separation again, so that the high-temperature steam (secondary gas phase) with the desorbed substances can be discharged to the outside after being purified again.
Similarly, the three liquid phases generated during the heat exchange in the heat exchanger 50, i.e., the condensate oily wastewater, enter the storage tank 60 for treatment and discharge.
Further, referring to fig. 3 and 7, after the fifth switch valve 322 is kept closed for 2 hours, the tenth switch valve 341 is opened, the first adsorption layer 3010 in the first adsorption tank 301 is purged, the tenth switch valve 341 is closed after 5 minutes, when the internal pressure of the first adsorption tank 301 is greater than or equal to 0.09MPa, the tenth switch valve 341 is closed to ensure the safety of the first adsorption tank 301, and when the desorption is completed, all the valves are closed.
Correspondingly, when the first adsorption tank 301 performs the adsorption operation, the second adsorption tank may also perform the desorption operation as described above, and the specific desorption process is the same as that of the first adsorption tank 301, which is not further described herein.
Correspondingly, the sewage related to the invention is the condensate oil-containing waste water after steam high-temperature desorption and the oil-containing sewage after water washing, the desorption is carried out once a week, and the discharge amount of the sewage every time is 6 t. The water washing sewage is discharged 1 time every 8 hours, and the water discharge amount is 14t every day.
Correspondingly, the exhaust gas collecting and treating device can treat exhaust gas to be 30000m3The emission index of the removal rate of the non-methane total hydrocarbon is more than or equal to 97 percent, and the emission concentration standard of the tail end of the non-methane total hydrocarbon is less than or equal to 80mg/m3The actual emission concentration of the non-methane total hydrocarbon tail end is less than or equal to 60mg/m3The standard of the discharge rate of the phenol terminal was 0.14kg/h, the actual discharge rate of the phenol terminal was 0.07kg/h, the discharge rate of the aniline terminal was 0.72kg/h, and the actual discharge rate of the aniline terminal was 0.36 kg/h.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. Processing apparatus is collected to waste gas, its characterized in that: the waste gas treatment device comprises a pretreatment unit, wherein the pretreatment unit is used for adjusting the flow of a gas medium;
the water washing unit is provided with a first inlet and is connected with the pretreatment unit, and the water washing unit is used for collecting the gas medium and realizing primary purification of the gas medium;
a gas-water separator, having a portion connected to the first outlet of the water washing unit, for collecting the primary purified gas medium and separating it into a primary gas phase and a primary liquid phase;
at least one adsorption tank, wherein the adsorption tank is provided with a first part which is connected with the other part of the gas-water separator and is used for adsorbing the primary gas phase through the adsorption tank and purifying the primary gas phase;
and the emptying device is connected with the adsorption tank and is used for discharging the purified primary gas phase to the outside.
2. The exhaust gas collection and treatment device of claim 1, wherein: the waste gas collecting and processing device further comprises at least one steam pipeline, one part of the steam pipeline is connected with the adsorption tank, and the other part of the steam pipeline is connected with a steam gas source to be used for the desorption of the adsorption tank and form a secondary gas phase and a secondary liquid phase inside the adsorption tank.
3. The exhaust gas collection and treatment device according to claim 2, wherein: the waste gas collecting and processing device further comprises a liquid discharging structure, and one part of the liquid discharging structure is connected with the adsorption tank and used for discharging the secondary liquid phase.
4. The exhaust gas collection and treatment device according to claim 2, wherein: the waste gas collecting and processing device further comprises a heat exchanger, one part of the heat exchanger is connected with the pretreatment unit through a steam recovery pipeline, and the other part of the heat exchanger is connected with the adsorption tank.
5. The exhaust gas collection and treatment device according to claim 4, wherein: the waste gas collecting and processing device also comprises an air purging pipeline, one part of the air purging pipeline is connected with the adsorption tank, and the other part of the air purging pipeline is connected with a gas source;
the waste gas collecting and processing device further comprises a sewage pipe, and the sewage pipe is connected with the third part of the storage tank, the gas-water separator, the water washing unit and the circulating processing unit respectively.
6. The exhaust gas collection and treatment device of claim 5, wherein: the waste gas collecting and processing device further comprises a storage tank, wherein the storage tank is provided with a first part connected with the heat exchanger, and the storage tank is provided with a second part connected with the steam recovery pipeline.
7. The exhaust gas collection and treatment device of claim 1, wherein: the pretreatment unit comprises at least one gas pipeline, and at least one gas discharge mechanism and at least one pressure sensor are respectively arranged on the gas pipeline.
8. The exhaust gas collection and treatment device of claim 1, wherein: the waste gas collecting and processing device further comprises a circulating processing unit, the circulating processing unit is provided with a first part connected with a water source, the circulating processing unit is provided with a second part connected with a second outlet of the water washing unit, and the circulating processing unit is further provided with a third part connected with a second inlet of the water washing unit.
9. The method for treating the waste gas by using the waste gas collecting and treating device as claimed in claims 1 to 8, characterized by comprising the following steps:
introducing an exhaust gas;
washing with water: washing the waste gas to further realize primary purification of the waste gas;
gas-water separation: separating primary gas phase and primary liquid phase from the primary purified waste gas;
adsorption: and adsorbing and purifying the primary gas phase through an adsorption tank and discharging the purified gas phase to the outside.
10. The method for treating exhaust gas by using the exhaust gas collecting and treating device according to claim 9, comprising the steps of:
desorption: forming a secondary gas phase and a secondary liquid phase in the adsorption tank by using steam;
heat exchange: the secondary gas phase is subjected to heat exchange through a heat exchanger and forms a tertiary gas phase and a tertiary liquid phase.
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