CN111589264A - Organic solvent waste gas compression condensation and membrane filtration recovery device thereof - Google Patents
Organic solvent waste gas compression condensation and membrane filtration recovery device thereof Download PDFInfo
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- CN111589264A CN111589264A CN202010615751.XA CN202010615751A CN111589264A CN 111589264 A CN111589264 A CN 111589264A CN 202010615751 A CN202010615751 A CN 202010615751A CN 111589264 A CN111589264 A CN 111589264A
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- 239000002912 waste gas Substances 0.000 title claims abstract description 88
- 238000007906 compression Methods 0.000 title claims abstract description 29
- 230000006835 compression Effects 0.000 title claims abstract description 29
- 238000009833 condensation Methods 0.000 title claims abstract description 27
- 230000005494 condensation Effects 0.000 title claims abstract description 27
- 239000003960 organic solvent Substances 0.000 title claims abstract description 27
- 238000011084 recovery Methods 0.000 title claims abstract description 22
- 238000005374 membrane filtration Methods 0.000 title claims abstract description 21
- 239000012528 membrane Substances 0.000 claims abstract description 74
- 239000007789 gas Substances 0.000 claims abstract description 65
- 239000007788 liquid Substances 0.000 claims abstract description 58
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 17
- 239000000498 cooling water Substances 0.000 claims abstract description 16
- 239000007791 liquid phase Substances 0.000 claims abstract description 16
- 239000012071 phase Substances 0.000 claims abstract description 15
- 238000001179 sorption measurement Methods 0.000 claims description 21
- 238000001816 cooling Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 14
- 239000010815 organic waste Substances 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 8
- 238000011026 diafiltration Methods 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 5
- 238000004064 recycling Methods 0.000 claims description 4
- 238000012958 reprocessing Methods 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims 2
- 238000000429 assembly Methods 0.000 claims 2
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 230000010354 integration Effects 0.000 abstract description 2
- 239000005416 organic matter Substances 0.000 abstract description 2
- 230000001681 protective effect Effects 0.000 description 7
- 238000000746 purification Methods 0.000 description 5
- 239000000110 cooling liquid Substances 0.000 description 3
- 229910001873 dinitrogen Inorganic materials 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000007084 catalytic combustion reaction Methods 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000011070 membrane recovery Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
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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
- B01D53/002—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 condensation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/54—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
- B01D46/543—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms using membranes
-
- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
A kind of organic solvent waste gas compression condensation and membrane filtration recovery unit, the apparatus includes compressor, gas-liquid separator, condenser group and product tank, the inlet of the compressor connects with the input pipeline of waste gas, still connect with the input pipeline of nitrogen on the input pipeline of waste gas; the inlet of the gas-liquid separator is communicated with the outlet of the compressor, the liquid phase outlet of the gas-liquid separator is communicated with the inlet of the product tank, the gas phase outlet of the gas-liquid separator is communicated with the hot inlet of the condenser group, the hot outlet of the condenser group is communicated with the inlet of the product tank, and the cold inlet and the cold outlet of the condenser group are externally connected with a cooling water input and output pipeline; and the product tank is also communicated with a membrane module for further purifying the waste gas. The device realizes the environmental protection idea of zero release, when purifying waste gas, can retrieve the organic matter in the waste gas, has realized environmental protection and circular economy integration.
Description
Technical Field
The invention relates to the technical field of waste gas purification treatment, in particular to an organic solvent waste gas compression and condensation and membrane filtration recovery device, and also relates to a purification method of the organic solvent waste gas compression and condensation and membrane filtration recovery device.
Background
At present, a large amount of organic waste gas is generated in the industrial production process, the waste gas is generally high in pollutant toxicity, the long-term contact of the waste gas with the organic waste gas can affect the body, and if the waste gas is directly discharged into the air, the waste gas can greatly affect the quality of the air.
In the prior art, the generated organic waste gas is generally treated by adsorption, filtration and purification and then discharged, and common methods include an activated carbon adsorption treatment method, a catalytic combustion method, a catalytic oxidation method, an acid-base neutralization method, a plasma method and the like, but the treatment effects of the methods are not ideal enough, so that organic matters in the organic waste gas cannot be recycled, and the waste gas discharged after treatment can cause pollution to external air to a certain extent.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides an organic solvent waste gas compression and condensation and membrane filtration recovery device which is reasonable in design, energy-saving and environment-friendly and can recover organic matters in waste gas and realize waste gas purification treatment.
The invention also provides a purification method of the organic solvent waste gas compression and condensation and the membrane filtration and recovery device thereof.
The technical problem to be solved by the present invention is achieved by the following technical means. The invention relates to an organic solvent waste gas compression and condensation and membrane filtration recovery device thereof, which comprises a compressor, a gas-liquid separator, a condenser group and a product tank, wherein an inlet of the compressor is communicated with a waste gas input pipeline; the inlet of the gas-liquid separator is communicated with the outlet of the compressor, the liquid phase outlet of the gas-liquid separator is communicated with the inlet of the product tank, the gas phase outlet of the gas-liquid separator is communicated with the hot inlet of the condenser group, the hot outlet of the condenser group is communicated with the inlet of the product tank, and the cold inlet and the cold outlet of the condenser group are externally connected with a cooling water input and output pipeline; and the product tank is also communicated with a membrane module for further purifying the waste gas.
The technical problem to be solved by the present invention can be further solved by the following technical scheme, for the above organic solvent waste gas compression condensation and membrane filtration recovery device, the membrane module is provided with 2, 2 membrane modules are respectively a first membrane module and a second membrane module, an inlet of the first membrane module is communicated with the product tank, an outlet of an adsorption side of the first membrane module is communicated with an inlet of the second membrane module, an outlet of a permeation side of the first membrane module is communicated with an exhaust pipeline, an outlet of an adsorption side of the second membrane module is communicated with an inlet of the compressor, and an outlet of a permeation side of the second membrane module is communicated with a waste gas input pipeline.
The technical problem to be solved by the invention can be further solved by adopting the following technical scheme that the device for compressing, condensing and filtering and recovering the organic solvent waste gas by the membrane comprises a condenser group and a membrane module, wherein the condenser group is provided with 2 condensers, the 2 condensers are respectively a first condenser and a second condenser, the heat inlet of the first condenser is communicated with the gas phase outlet of the gas-liquid separator, the heat outlet of the first condenser is communicated with the heat inlet of the second condenser, the cold inlet and the cold outlet of the second condenser are externally connected with a cooling water input and output pipeline, the heat outlet of the second condenser is communicated with the inlet of the product tank, the heat chamber of the second condenser is also provided with an exhaust port, the exhaust port of the second condenser is communicated with the cold inlet of the first condenser, and the cold outlet of the first condenser is communicated with the membrane module.
The technical problem to be solved by the invention can be further realized by the following technical scheme that for the organic solvent waste gas compression and condensation and membrane filtration recovery device, a cooling mechanism of the compressor is externally connected with a cooling pipeline, and a metering tank and an input pump are also arranged on the cooling pipeline.
The technical problem to be solved by the invention can be further realized by the following technical scheme that for the organic solvent waste gas compression and condensation and membrane filtration recovery device, the bottom of the gas-liquid separator is also communicated with a return pipeline communicated with a cooling mechanism of a compressor, and a return control valve is arranged on the return pipeline.
The technical problem to be solved by the invention can be further realized by the following technical scheme that for the organic solvent waste gas compression and condensation and membrane filtration recovery device, a third condenser is communicated with a backflow pipeline, a hot inlet and a hot outlet of the third condenser are communicated with the backflow pipeline, and a cold inlet and a cold outlet of the third condenser are externally connected with a cooling water input and output pipeline.
The technical problem to be solved by the invention can be further realized by the following technical scheme that for the organic solvent waste gas compression condensation and membrane filtration recovery device, a fourth condenser is also communicated between a liquid phase outlet of the gas-liquid separator and an inlet of the product tank, a hot inlet and a hot outlet of the fourth condenser are respectively communicated with the liquid phase outlet of the gas-liquid separator and the inlet of the product tank, and a cold inlet and a cold outlet of the fourth condenser are externally connected with a cooling water input and output pipeline.
The technical problem to be solved by the invention can be further realized by the following technical scheme, and the device for compressing, condensing and filtering and recovering the organic solvent waste gas by the membrane comprises a method for compressing, condensing and filtering and recovering the organic solvent waste gas by the membrane, and comprises the following steps:
(1) waste gas to be purified is input from a waste gas input pipeline, mixed with nitrogen input by a nitrogen input pipeline, and then sent into a compressor unit for compression, and then sent into a gas-liquid separator;
(2) the gas-liquid separator performs gas-liquid separation on the input waste gas, the separated liquid is sent into the product tank, the separated gas is sent into the condenser group, and meanwhile, the liquefied organic waste gas generated in the gas-liquid separator flows back to the compressor to lubricate and cool the compressor;
(3) the gas entering the condenser group is cooled and then is divided into liquid phase waste gas and gas phase waste gas, the liquid phase waste gas is sent into the product tank, and the gas phase waste gas is sent into the membrane component;
(4) and gas phase waste gas entering the membrane module is subjected to adsorption and diafiltration treatment by the membrane module, the gas subjected to adsorption and diafiltration is sent back to the compressor for reprocessing, and the gas on the permeation side is sent into the nitrogen input pipeline for recycling.
Compared with the prior art, the method has the advantages that nitrogen is added into the generated waste gas to serve as protective gas, then the mixed gas is sent into the compressor, after isothermal compression, the mixed gas is sent into the gas-liquid separator to be subjected to gas-liquid separation, liquefaction and recovery, the high-pressure residual gas which is not liquefied is sent into the condensation gas group to be subjected to cooling separation, then liquefaction and recovery are carried out, the uncondensed gas is sent into the membrane assembly, after membrane adsorption, permeation and filtration, the gas is sent into the inlet of the compressor again to be subjected to compression and condensation, organic matters are recycled through cyclic condensation, the added nitrogen protective gas is discharged from the residual side of the membrane and is added into the waste gas again to be recycled as protective gas, the cyclic circulation is carried out in the way, the organic matters of the waste gas. The device realizes the environmental protection idea of zero release, when purifying waste gas, can retrieve the organic matter in the waste gas, has realized environmental protection and circular economy integration.
Drawings
FIG. 1 is a schematic diagram of a structure of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the apparatus for compressing, condensing and membrane filtering and recovering organic solvent waste gas comprises a compressor 35, a gas-liquid separator 20, a condenser group and a product tank 11, wherein an inlet of the compressor 35 is communicated with a waste gas input pipeline, the waste gas input pipeline is also communicated with a nitrogen gas input pipeline, and the nitrogen gas input pipeline is also provided with a nitrogen gas regulating valve 32; an inlet of the gas-liquid separator 20 is communicated with an outlet of the compressor 35, a liquid phase outlet of the gas-liquid separator 20 is communicated with an inlet of the product tank 11, a gas phase outlet of the gas-liquid separator 20 is communicated with a hot inlet of the condenser group, a hot outlet of the condenser group is communicated with an inlet of the product tank 11, and a cold inlet and a cold outlet of the condenser group are externally connected with a cooling water input and output pipeline; the product tank 11 is also connected to a membrane module for further purifying the exhaust gas. The waste gas input pipeline is provided with safety auxiliary equipment such as a waste gas safety valve 31, an oxygen meter 28, a waste gas temperature transmitter 27, 2 waste gas pressure transmitters 25 and 26, a flame arrester 29, a basket filter 30, a pneumatic cut-off valve 33 and the like; a liquefied liquid level meter 24 is arranged on the gas-liquid separator 20, and a product liquid level meter 12 is arranged on the product tank 11; a discharge pipeline is also arranged at the bottom of the product tank 11, and a discharge control valve 10 is arranged on the discharge pipeline; a tank safety valve 13 and a tank pressure transmitter 14 are also arranged at the top of the product tank 11; a gas-liquid safety valve 21 and a gas-liquid pressure transmitter 22 are also arranged on the gas-liquid separator 20; expansion joints, namely a first expansion joint 34 and a second expansion joint 36, are arranged on two sides of the compressor 35; waste gas generated by an external system is added with nitrogen protective gas and then is connected into a compressor 35, and enters a condenser group after isothermal compression, and organic matters in the waste gas are recovered by adopting multi-stage condensation liquefaction; the uncondensed gas enters the membrane module, returns to the inlet of the compressor 35 after membrane adsorption and diafiltration, is compressed and condensed again, is circularly condensed to recycle organic matters, and returns to the device again as protective gas for recycling, wherein the nitrogen is on the residual side of the membrane.
The compressor 35 is a power device for converting mechanical energy into gas pressure energy, and is a gas compressor 35 in the prior art, and is used for compressing and liquefying waste gas.
The membrane module adopts the membrane module among the prior art, refers to the practical device that contains membrane and bearing structure thereof of various specifications, and single subassembly or a plurality of subassemblies can all assemble the membrane separator, and the membrane module that this application adopted is roll formula membrane module, and the security performance is improved simultaneously in the maintenance of being convenient for to equipment layout reduces area simultaneously.
The number of the membrane modules is 2, the 2 membrane modules are respectively a first membrane module 16 and a second membrane module 17, an inlet of the first membrane module 16 is communicated with a product tank 11, an input regulating valve 15 is further communicated between the first membrane module 16 and the product tank 11, an outlet on an adsorption side of the first membrane module 16 is communicated with an inlet of the second membrane module 17, an outlet on a permeation side of the first membrane module 16 is communicated with an exhaust pipeline, an outlet on an adsorption side of the second membrane module 17 is communicated with an inlet of a compressor 35, an outlet on an adsorption side of the second membrane module 17 is further communicated with an inlet of the compressor 35, and an outlet on a permeation side of the second membrane module 17 is communicated with a waste gas input pipeline. The first membrane module 16 and the second membrane module 17 are used for performing secondary adsorption and permeation on the gas which is output by the condenser group and is not liquefied, organic matters in the waste gas pass through the first membrane module 16 for adsorption and permeation, are input into the second membrane module 17 for secondary adsorption and permeation, and are sent back to the compressor 35 for secondary compression and condensation after passing through the second membrane module 17 for adsorption and permeation; the gas discharged from the residual side of the first membrane module 16 is mainly air and nitrogen and is discharged through a discharge pipeline; the gas discharged from the other side of the second membrane module 17 is basically added nitrogen protective gas, and can be continuously sent back to the waste gas input pipeline to be mixed with the waste gas and then used as protective gas again.
The condenser group is provided with 2 condensers, the 2 condensers are a first condenser 19 and a second condenser 18 respectively, a hot inlet of the first condenser 19 is communicated with a gas outlet of a gas-liquid separator 20, a hot outlet of the first condenser 19 is communicated with a hot inlet of the second condenser 18, a cold inlet and a cold outlet of the second condenser 18 are externally connected with a cooling water input and output pipeline, a hot outlet of the second condenser 18 is communicated with an inlet of the product tank 11, an exhaust port is further arranged on a hot cavity of the second condenser 18, an exhaust port of the second condenser 18 is communicated with a cold inlet of the first condenser 19, and a cold outlet of the first condenser 19 is communicated with the membrane module. First condenser 19 and second condenser 18 are used for carrying out the second grade condensation to the high pressure residual gas that fails to liquefy in vapour and liquid separator 20, in second condenser 18, utilize the outside 7 cooling water that lets in to lower the temperature the residual gas, in first condenser 19, utilize second condenser 18 to cool down the residual gas that newly lets in through the residual gas that lowers the temperature, realize condensing the liquefaction to retrieve to one of them part residual gas.
The cooling mechanism of the compressor 35 is externally connected with a cooling pipeline, the cooling pipeline is also provided with a metering tank 2, a Y-shaped filter 37 and an input pump 3, and the input pump 3 is a centrifugal pump; the measuring tank 2 is internally provided with cooling liquid, and the measuring tank 2 is also provided with a measuring liquid level meter 1; the cooling pipeline is arranged for introducing cooling liquid into the cooling mechanism of the compressor 35 to cool the compression, so as to ensure the normal operation of the compressor 35; the cooling liquid can be glycol in the prior art.
The bottom of the gas-liquid separator 20 is also communicated with a return pipe communicated with a cooling mechanism of the compressor 35, and the return pipe is provided with a return flow control valve 4, a return flow meter 5 and a return flow temperature transmitter 6, so that liquefied organic waste gas generated in the gas-liquid separator 20 passes through the return pipe, and then is automatically controlled through the return flow meter 5 and the return flow control valve 4, and part of liquid returns to the cooling mechanism of the compressor 35, so as to spray, lubricate and cool the compressor 35.
The reflux pipeline is also communicated with a third condenser 8, a hot inlet and a hot outlet of the third condenser 8 are communicated with the reflux pipeline, a cold inlet and a cold outlet of the third condenser 8 are externally connected with a cooling water input and output pipeline, and a cooling regulating valve 7 is also arranged on the cooling water input and output pipeline at the cold inlet of the third condenser 8. The third condenser 8 is arranged to further cool the part of the organic waste gas liquefied in the gas-liquid separator 20 when the part of the organic waste gas is delivered to the cooling mechanism of the compressor 35, so as to better lubricate and cool the compressor 35.
A fourth condenser 9 is communicated between the liquid phase outlet of the gas-liquid separator 20 and the inlet of the product tank 11, the hot inlet and the hot outlet of the fourth condenser 9 are respectively communicated with the liquid phase outlet of the gas-liquid separator 20 and the inlet of the product tank 11, and the cold inlet and the cold outlet of the fourth condenser 9 are externally connected with a cooling water input and output pipeline. The fourth condenser 9 is provided for further cooling the liquefied exhaust gas input into the product tank 11 from the gas-liquid separator 20 by the cooling water, and completely liquefying the liquefied exhaust gas into liquid to be stored in the product tank 11.
A method for compressing, condensing and filtering and recovering organic solvent waste gas by a membrane comprises the following steps:
(1) waste gas to be purified is input from a waste gas input pipeline, mixed with nitrogen input by a nitrogen input pipeline, and then sent into a compressor unit for compression, and then sent into a gas-liquid separator;
(2) the gas-liquid separator performs gas-liquid separation on the input waste gas, the separated liquid is sent into the product tank, the separated gas is sent into the condenser group, and meanwhile, the liquefied organic waste gas generated in the gas-liquid separator flows back to the compressor to lubricate and cool the compressor;
(3) the gas entering the condenser group is cooled and then is divided into liquid phase waste gas and gas phase waste gas, the liquid phase waste gas is sent into the product tank, and the gas phase waste gas is sent into the membrane component;
(4) and gas phase waste gas entering the membrane module is subjected to adsorption and diafiltration treatment by the membrane module, the gas subjected to adsorption and diafiltration is sent back to the compressor for reprocessing, and the gas on the permeation side is sent into the nitrogen input pipeline for recycling.
Claims (8)
1. The utility model provides an organic solvent waste gas compression condensation and membrane filtration recovery unit which characterized in that: the device comprises a compressor, a gas-liquid separator, a condenser group and a product tank, wherein an inlet of the compressor is communicated with a waste gas input pipeline which is also communicated with a nitrogen input pipeline; the inlet of the gas-liquid separator is communicated with the outlet of the compressor, the liquid phase outlet of the gas-liquid separator is communicated with the inlet of the product tank, the gas phase outlet of the gas-liquid separator is communicated with the hot inlet of the condenser group, the hot outlet of the condenser group is communicated with the inlet of the product tank, and the cold inlet and the cold outlet of the condenser group are externally connected with a cooling water input and output pipeline; and the product tank is also communicated with a membrane module for further purifying the waste gas.
2. The organic solvent waste gas compression and condensation and membrane filtration recovery device thereof according to claim 1, wherein: the number of the membrane assemblies is 2, the 2 membrane assemblies are respectively a first membrane assembly and a second membrane assembly, an inlet of the first membrane assembly is communicated with the product tank, an outlet of an adsorption side of the first membrane assembly is communicated with an inlet of the second membrane assembly, an outlet of a permeation side of the first membrane assembly is communicated with an exhaust pipeline, an outlet of an adsorption side of the second membrane assembly is communicated with an inlet of a compressor, and an outlet of a permeation side of the second membrane assembly is communicated with a waste gas input pipeline.
3. The organic solvent waste gas compression and condensation and membrane filtration recovery device thereof according to claim 1, wherein: the condenser group is provided with 2 condensers, the 2 condensers are a first condenser and a second condenser respectively, a hot inlet of the first condenser is communicated with a gas phase outlet of the gas-liquid separator, a hot outlet of the first condenser is communicated with a hot inlet of the second condenser, a cold inlet and a cold outlet of the second condenser are externally connected with a cooling water input and output pipeline, a hot outlet of the second condenser is communicated with an inlet of the product tank, an exhaust port is further arranged on a hot cavity of the second condenser, the exhaust port of the second condenser is communicated with the cold inlet of the first condenser, and the cold outlet of the first condenser is communicated with the membrane assembly.
4. The organic solvent waste gas compression and condensation and membrane filtration recovery device thereof according to claim 1, wherein: the cooling mechanism of the compressor is externally connected with a cooling pipeline, and a metering tank and an input pump are also arranged on the cooling pipeline.
5. The organic solvent waste gas compression and condensation and membrane filtration recovery device thereof according to claim 1, wherein: the bottom of the gas-liquid separator is also communicated with a return pipeline communicated with a cooling mechanism of the compressor, and a return control valve is arranged on the return pipeline.
6. The organic solvent waste gas compression and condensation and membrane filtration recovery device thereof according to claim 5, wherein: and the backflow pipeline is also communicated with a third condenser, a hot inlet and a hot outlet of the third condenser are communicated with the backflow pipeline, and a cold inlet and a cold outlet of the third condenser are externally connected with a cooling water input and output pipeline.
7. The organic solvent waste gas compression and condensation and membrane filtration recovery device thereof according to claim 1, wherein: and a fourth condenser is also communicated between the liquid phase outlet of the gas-liquid separator and the inlet of the product tank, the hot inlet and the hot outlet of the fourth condenser are respectively communicated with the liquid phase outlet of the gas-liquid separator and the inlet of the product tank, and the cold inlet and the cold outlet of the fourth condenser are externally connected with a cooling water input and output pipeline.
8. A method for compressing, condensing and filtering and recovering organic solvent waste gas by a membrane is characterized by comprising the following steps: the method uses the organic solvent waste gas compression condensation and membrane filtration recovery device of any one of claims 1 to 7, and comprises the following steps:
(1) waste gas to be purified is input from a waste gas input pipeline, mixed with nitrogen input by a nitrogen input pipeline, and then sent into a compressor unit for compression, and then sent into a gas-liquid separator;
(2) the gas-liquid separator performs gas-liquid separation on the input waste gas, the separated liquid is sent into the product tank, the separated gas is sent into the condenser group, and meanwhile, the liquefied organic waste gas generated in the gas-liquid separator flows back to the compressor to lubricate and cool the compressor;
(3) the gas entering the condenser group is cooled and then is divided into liquid phase waste gas and gas phase waste gas, the liquid phase waste gas is sent into the product tank, and the gas phase waste gas is sent into the membrane component;
(4) and gas phase waste gas entering the membrane module is subjected to adsorption and diafiltration treatment by the membrane module, the gas subjected to adsorption and diafiltration is sent back to the compressor for reprocessing, and the gas on the permeation side is sent into the nitrogen input pipeline for recycling.
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Cited By (2)
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| CN115253609A (en) * | 2022-07-14 | 2022-11-01 | 陕西榆能化学材料有限公司 | Method and device for recycling VOCS (volatile organic Compounds) in tank field |
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| CN208275203U (en) * | 2018-04-18 | 2018-12-25 | 平顶山市神马万里化工股份有限公司 | Organic waste gas recycling system in a kind of cyclohexanol production |
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