CN110697822A - Method for recycling waste solvent of coating varnish - Google Patents
Method for recycling waste solvent of coating varnish Download PDFInfo
- Publication number
- CN110697822A CN110697822A CN201910882329.8A CN201910882329A CN110697822A CN 110697822 A CN110697822 A CN 110697822A CN 201910882329 A CN201910882329 A CN 201910882329A CN 110697822 A CN110697822 A CN 110697822A
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- 239000002966 varnish Substances 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000011248 coating agent Substances 0.000 title claims abstract description 19
- 238000000576 coating method Methods 0.000 title claims abstract description 19
- 238000004064 recycling Methods 0.000 title claims abstract description 18
- 239000010887 waste solvent Substances 0.000 title claims abstract description 17
- 238000011084 recovery Methods 0.000 claims abstract description 39
- 239000012071 phase Substances 0.000 claims abstract description 35
- 239000002904 solvent Substances 0.000 claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000007791 liquid phase Substances 0.000 claims abstract description 22
- 239000008367 deionised water Substances 0.000 claims abstract description 20
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 20
- 239000002699 waste material Substances 0.000 claims abstract description 12
- 239000012459 cleaning agent Substances 0.000 claims abstract description 11
- 238000001179 sorption measurement Methods 0.000 claims description 30
- 239000004149 tartrazine Substances 0.000 claims description 13
- 239000004172 quinoline yellow Substances 0.000 claims description 12
- 239000004229 Alkannin Substances 0.000 claims description 10
- 239000002151 riboflavin Substances 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 60
- 239000000463 material Substances 0.000 description 18
- 238000003795 desorption Methods 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 239000002920 hazardous waste Substances 0.000 description 6
- 239000012855 volatile organic compound Substances 0.000 description 6
- 238000000605 extraction Methods 0.000 description 4
- 239000007792 gaseous phase Substances 0.000 description 4
- 239000002912 waste gas Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 150000002894 organic compounds Chemical class 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/16—Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0033—Other features
- B01D5/0036—Multiple-effect condensation; Fractional condensation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0057—Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes
- B01D5/006—Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes with evaporation or distillation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0078—Condensation of vapours; Recovering volatile solvents by condensation characterised by auxiliary systems or arrangements
- B01D5/009—Collecting, removing and/or treatment of the condensate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0078—Condensation of vapours; Recovering volatile solvents by condensation characterised by auxiliary systems or arrangements
- B01D5/0093—Removing and treatment of non condensable gases
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a method for recycling a waste solvent of coating varnish, which is characterized in that a settled waste varnish cleaning agent continuously enters a solvent recovery tower, gas phase is extracted from the top of the solvent recovery tower and enters a first-stage condenser, and residual oil is extracted from a tower kettle; the first-stage condenser is a partial condenser, part of a condensed liquid phase flows back to the solvent recovery tower, part of the condensed liquid phase is taken as a product and is collected to the product tank, after the uncondensed gas phase and the gas phase from the product tank are cooled by the second-stage condenser, the liquid phase enters the product tank, and the uncondensed gas enters the vacuum system; the tail gas at the outlet of the vacuum system is divided into two paths, one path is absorbed by an absorption device and then discharged, and the other path is fed into a TAR system; one path of high-temperature tail gas at the outlet of the TAR system enters a heat exchanger to exchange heat with deionized water, and then deionized water steam formed after the heat exchange enters a reboiler and serves as a heat source of the solvent recovery tower. The invention uses the hot air generation deionized hot water of the TAR system as the heat source of the rectification device, so that the solvent recovery tower does not additionally generate energy consumption.
Description
Technical Field
The invention relates to the technical field of automobile production waste gas recovery treatment, relates to a method for recycling a waste solvent, and particularly relates to a method for recycling a waste solvent for coating varnish.
Background
The common varnish cleaning agent for automobile painting workshops is used for cleaning robot pipelines and cleaning and maintaining on site. After being used, the fresh varnish cleaning agent is mixed with varnish components (resin, solvent and the like) to serve as a waste varnish cleaning agent, enters a dangerous waste tank for storage, and then is used as dangerous waste to be externally wrapped to a dangerous waste factory for treatment. The waste varnish cleaning agent is used as hazardous waste, and the storage and transportation of the waste varnish cleaning agent bring great potential safety hazards to a coating workshop.
At present, no relevant patent technology for recycling the waste solvent of the coating varnish exists, so that a method for recycling the waste solvent of the coating varnish needs to be invented urgently to effectively recycle effective components in the waste solvent of the coating varnish, realize hazardous waste reduction, reduce the treatment cost and raw material cost of hazardous waste of enterprises, and ensure that the energy consumption in the recycling process is less and the method is green and environment-friendly.
Disclosure of Invention
The invention aims to provide a method for recycling a coating varnish waste solvent aiming at the defects in the prior art.
The technical scheme adopted for realizing the purpose of the invention is as follows:
a method for recycling a coating varnish waste solvent comprises the following steps:
the settled waste varnish cleaning agent continuously enters a solvent recovery tower T101, gas phase is extracted from the top of the solvent recovery tower T101 and enters a first-stage condenser E102, and residual oil is extracted from the tower bottom;
the first-stage condenser E102 is a partial condenser, a part of a condensed liquid phase flows back to the solvent recovery tower T101, a part of the condensed liquid phase is taken as a product and is extracted to the product tank V101, an uncondensed gas phase and a gas phase from the product tank V101 enter the second-stage condenser E103 to be cooled, a liquid phase enters the product tank V101, and an uncondensed gas enters a vacuum system;
tail gas at the outlet of the vacuum system is divided into two paths, wherein one path of tail gas enters an adsorption device for adsorption and then is directly discharged, and the other path of tail gas enters a TAR system; one path of high-temperature tail gas at the outlet of the TAR system enters a heat exchanger E104 to exchange heat with deionized water to form deionized water steam, and the deionized water steam enters a reboiler E101 to be used as a heat source of a solvent recovery tower T101; the temperature of the deionized water vapor is higher than the temperature of the tower bottom of the recovery tower T101.
Preferably, the solvent recovery column T101 is a stripping column, and the operating pressure is 1KPa to 50 KPa.
Preferably, the VOC content in the tail gas discharged by the adsorption device is less than 1 ppm.
Preferably, the temperature difference between the temperature of the deionized water vapor formed by the heat exchanger E104 and the temperature of the bottom of the recovery tower T101 is more than or equal to 12 ℃.
The method uses the deionized hot water (water vapor) generated by the hot air of the TAR system as the heat source of the rectifying device, avoids the blockage of the reboiler E101 caused by the overhigh local temperature of the reboiler due to the direct use of the hot air as the heat source to accelerate the solidification of the curing agent, and avoids the extra energy consumption of the solvent recovery tower T101.
According to the invention, the tail gas absorbed in vacuum is treated by the adsorption device or TAR system and then discharged after reaching the standard, and the discharged tail gas has low VOC and is green and environment-friendly.
Through determination, the solvent recovery rate of the coating varnish waste solvent recycling method is more than or equal to 60 percent, and the hazardous waste reduction is more than or equal to 60 percent.
In a word, the method for recycling the waste solvent of the coating varnish can effectively recycle effective components in the waste solvent of the coating varnish, realize the reduction of hazardous wastes and reduce the treatment cost and the raw material cost of the hazardous wastes of enterprises.
Drawings
FIG. 1 is a process flow diagram of a method for recycling a waste solvent for coating varnish according to the present invention;
in the figure: t101-solvent recovery column; e101-a reboiler; e102-first-stage condenser; e103-a secondary condenser; e104-heat exchanger; p101-tower kettle pump; v101-product tank.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in FIG. 1, the method for recycling the waste solvent for coating varnish of the present invention comprises the following steps:
adding the waste varnish cleaning agent from the lower part of the solvent recovery tower T101, extracting gas phase at the top of the solvent recovery tower T101, entering a first-stage condenser E102, and extracting residual oil at a tower kettle;
the first-stage condenser E102 is a partial condenser, a part of a condensed liquid phase flows back to the solvent recovery tower T101, a part of the condensed liquid phase is taken as a product and is extracted to the product tank V101, an uncondensed gas phase and a gas phase from the product tank V101 enter the second-stage condenser E103 to be cooled, a liquid phase enters the product tank V101, and an uncondensed gas enters a vacuum system;
the tail gas at the outlet of the vacuum system is divided into two paths, wherein one path of tail gas enters an adsorption device for adsorption and then is directly discharged, and the other path of tail gas enters a TAR system (waste gas incineration heating system); one path of high-temperature tail gas at the outlet of the TAR system enters a heat exchanger E104 to exchange heat with deionized water to form deionized water steam, and the deionized water steam enters a reboiler E101 to be used as a heat source of a solvent recovery tower T101; the temperature of the deionized water vapor is higher than the temperature of the tower bottom of the recovery tower T101.
Wherein, the lower part of the solvent recovery tower T101 is provided with a raw material inlet, the top part is provided with a tower top extraction outlet, the bottom part is provided with a tower kettle extraction outlet, the tower top extraction outlet is connected with a first-stage condenser E101, and the tower kettle extraction outlet extracts residual oil; the first-stage condenser E102 is provided with a material inlet, a gas-phase outlet and a liquid-phase outlet, wherein the material inlet is connected with the solvent recovery tower T101, the gas-phase outlet is connected with the second-stage condenser E103, the liquid-phase outlet is divided into two paths, one path is connected with the solvent recovery tower T101, and the other path is connected with the product tank V101; the secondary condenser E103 is provided with a material inlet, a gas phase outlet and a liquid phase outlet, wherein the material inlet is connected with the primary condenser E101 and the product tank V101, the liquid phase outlet is connected with the product tank V101, and the gas phase outlet is connected with a vacuum system; the vacuum system is provided with a gas phase inlet and a gas phase outlet, wherein the gas phase inlet is connected with the secondary condenser E103 and the adsorption device, and the gas phase outlet is connected with the adsorption device and the TAR system; the adsorption device is provided with a gas phase inlet and a gas phase outlet, wherein the gas phase inlet is connected with a vacuum system, the gas phase outlet produces tail gas, and the desorption gas outlet is also connected with the gas phase inlet of the vacuum system; the TAR system is provided with a gas phase inlet and a gas phase outlet, wherein the gas phase inlet is connected with the vacuum system, the gas phase outlet is divided into two paths, one path enters a heat material inlet of the heat exchanger E104, and the other path enters a subsequent system; the heat exchanger E104 is provided with a hot material inlet, a hot material outlet, a cold material inlet and a cold material outlet, wherein the hot material inlet is connected with the TAR system, the hot material outlet enters a subsequent system, deionized water is added from the cold material inlet, and the cold material outlet is connected with the reboiler E101; the reboiler E101 is provided with a hot material inlet and a hot material outlet, wherein the hot material inlet and the hot material outlet are both connected to the heat exchanger E104.
In the present invention, the adsorption device may be an activated carbon adsorber, an activated carbon adsorption tower, or other gas adsorption device for waste gas treatment, and is preferably an activated carbon adsorption apparatus.
It should be noted that, in the present invention, the vacuum system is a prior art device, such as a vacuum pump, and is mainly characterized in that negative pressure is provided for the system and the vacuum negative pressure is used for desorption of the adsorption device.
Wherein, adsorption equipment's desorption gaseous phase export still connects vacuum system's gaseous phase import, when desorption to adsorption equipment, closes adsorption equipment tail gas export, utilizes vacuum negative pressure to desorb the gaseous phase material that adsorption equipment adsorbs, and the pipeline that is connected through adsorption equipment and vacuum system's gaseous phase import will have the gas suction vacuum system of desorption thing to send into the TAR system through the tail gas export of connecting the TAR system, realize incineration disposal, thereby realize the vacuum negative pressure desorption directly in vain to adsorption equipment.
When the desorption of the adsorption device is not needed, the waste gas entering the adsorption device through the vacuum system is directly discharged or enters the TAR system for incineration treatment after being adsorbed by the adsorption device.
Example 1
The settled waste varnish cleaning agent continuously enters a solvent recovery tower T101, the pressure at the top of the solvent recovery tower T101 is 1KPa, the gas phase at the top of the tower is extracted and enters a first-stage condenser E102, and the residual oil is extracted from the bottom of the tower. The first-stage condenser E102 is a partial condenser, a part of a condensed liquid phase flows back to the solvent recovery tower T101, a part of the condensed liquid phase is taken as a product and is extracted to the product tank V101, and an uncondensed gas phase enters the second-stage condenser E103. Gas phases from the product tank V101 and the primary condenser E102 are condensed and cooled by the secondary condenser E103, liquid phases enter the product tank V101, and non-condensable gas enters a vacuum system. The tail gas at the outlet of the vacuum system is divided into two paths, one path of tail gas enters an adsorption device for adsorption and then is directly discharged, the VOC (volatile organic compounds) of the discharged tail gas is less than 1ppm, and the other path of tail gas enters a TAR (total organic compounds) system. One path of high-temperature tail gas at the outlet of the TAR system enters a heat exchanger E104 to exchange heat with deionized water and then returns to the main pipeline to enter a subsequent system. Deionized water (water vapor) after heat exchange between the heat exchanger E104 and high-temperature tail gas at the outlet of the TAR system enters a reboiler E101 to be used as a heat source of the recovery tower T101.
Example 2
The settled waste varnish cleaning agent continuously enters a solvent recovery tower T101, the pressure at the top of the solvent recovery tower T101 is 50KPa, the gas phase at the top of the tower is extracted and enters a first-stage condenser E102, and the residual oil is extracted from the bottom of the tower. The first-stage condenser E102 is a partial condenser, a part of a condensed liquid phase flows back to the solvent recovery tower T101, a part of the condensed liquid phase is taken as a product and is extracted to the product tank V101, and an uncondensed gas phase enters the second-stage condenser E103. Gas phases from the product tank V101 and the primary condenser E102 are condensed and cooled by the secondary condenser E103, liquid phases enter the product tank V101, and non-condensable gas enters a vacuum system. The tail gas at the outlet of the vacuum system is divided into two paths, one path of tail gas enters an adsorption device for adsorption and then is directly discharged, the VOC (volatile organic compounds) of the discharged tail gas is less than 1ppm, and the other path of tail gas enters a TAR (total organic compounds) system. One path of high-temperature tail gas at the outlet of the TAR system enters a heat exchanger E104 to exchange heat with deionized water and then returns to the main pipeline to enter a subsequent system. Deionized water (water vapor) after heat exchange between the heat exchanger E104 and high-temperature tail gas at the outlet of the TAR system enters a reboiler E101 to be used as a heat source of the recovery tower T101.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (4)
1. A method for recycling a waste solvent of coating varnish is characterized by comprising the following steps:
the settled waste varnish cleaning agent continuously enters a solvent recovery tower (T101), gas phase is extracted from the top of the solvent recovery tower (T101) and enters a first-stage condenser (E102), and residual oil is extracted from the bottom of the tower;
the first-stage condenser (E102) is a partial condenser, a part of a condensed liquid phase flows back to the solvent recovery tower (T101), a part of the condensed liquid phase is taken as a product and is collected to the product tank (V101), an uncondensed gas phase and a gas phase from the product tank (V101) enter the second-stage condenser (E103) for cooling, and then the liquid phase enters the product tank V101 and the uncondensed gas enters a vacuum system;
tail gas at the outlet of the vacuum system is divided into two paths, wherein one path of tail gas enters an adsorption device for adsorption and then is directly discharged, and the other path of tail gas enters a TAR system; one path of high-temperature tail gas at the outlet of the TAR system enters a heat exchanger (E104) to exchange heat with deionized water to form deionized water steam which enters a reboiler (E101) to be used as a heat source of a solvent recovery tower (T101); the temperature of the deionized water vapor is higher than the temperature of the bottom of the recovery tower (T101).
2. The method for recycling the used solvent for coating varnish according to claim 1, wherein the solvent recovery tower (T101) is a stripping tower and the operating pressure is 1KPa to 50 KPa.
3. The method for recycling the waste solvent for coating varnish as claimed in claim 1, wherein the VOC content in the exhaust gas discharged from the adsorption device is less than 1 ppm.
4. The method for recycling the used solvent for coating varnish according to claim 1, wherein the temperature difference between the temperature of the deionized water vapor formed at the outlet of the heat exchanger (E104) and the temperature of the bottom of the recovery tower (T101) is not less than 12 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910882329.8A CN110697822A (en) | 2019-09-18 | 2019-09-18 | Method for recycling waste solvent of coating varnish |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910882329.8A CN110697822A (en) | 2019-09-18 | 2019-09-18 | Method for recycling waste solvent of coating varnish |
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| CN110697822A true CN110697822A (en) | 2020-01-17 |
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| CN201910882329.8A Pending CN110697822A (en) | 2019-09-18 | 2019-09-18 | Method for recycling waste solvent of coating varnish |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113680088A (en) * | 2020-05-18 | 2021-11-23 | 北京诺维新材科技有限公司 | Multi-effect rectification method, rectification device and application thereof |
| CN114749002A (en) * | 2022-04-20 | 2022-07-15 | 天津大学 | System and method for absorbing melamine tail gas through concentrated hydrochloric acid reaction |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2765809A1 (en) * | 1997-07-11 | 1999-01-15 | Jean Dufourneaud | Device for reducing pollutant discharge from hydrocarbon strippers |
| CN205627146U (en) * | 2016-05-30 | 2016-10-12 | 安庆市鑫祥瑞化工有限公司 | Retrieve and paint rectifier unit for cleaner |
| CN207877647U (en) * | 2017-12-07 | 2018-09-18 | 江西昌宁化工有限责任公司 | A kind of organic harmless processing unit of distillation waste |
| CN211111144U (en) * | 2019-09-18 | 2020-07-28 | 天津净润环保科技有限公司 | Coating varnish waste solvent recycling device |
-
2019
- 2019-09-18 CN CN201910882329.8A patent/CN110697822A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2765809A1 (en) * | 1997-07-11 | 1999-01-15 | Jean Dufourneaud | Device for reducing pollutant discharge from hydrocarbon strippers |
| CN205627146U (en) * | 2016-05-30 | 2016-10-12 | 安庆市鑫祥瑞化工有限公司 | Retrieve and paint rectifier unit for cleaner |
| CN207877647U (en) * | 2017-12-07 | 2018-09-18 | 江西昌宁化工有限责任公司 | A kind of organic harmless processing unit of distillation waste |
| CN211111144U (en) * | 2019-09-18 | 2020-07-28 | 天津净润环保科技有限公司 | Coating varnish waste solvent recycling device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113680088A (en) * | 2020-05-18 | 2021-11-23 | 北京诺维新材科技有限公司 | Multi-effect rectification method, rectification device and application thereof |
| CN114749002A (en) * | 2022-04-20 | 2022-07-15 | 天津大学 | System and method for absorbing melamine tail gas through concentrated hydrochloric acid reaction |
| CN114749002B (en) * | 2022-04-20 | 2024-03-29 | 天津大学 | System and method for absorbing melamine tail gas through concentrated hydrochloric acid reaction |
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