CN109289226B - Method and device for treating high-concentration decalin tail gas - Google Patents
Method and device for treating high-concentration decalin tail gas Download PDFInfo
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- CN109289226B CN109289226B CN201811148918.5A CN201811148918A CN109289226B CN 109289226 B CN109289226 B CN 109289226B CN 201811148918 A CN201811148918 A CN 201811148918A CN 109289226 B CN109289226 B CN 109289226B
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- NNBZCPXTIHJBJL-UHFFFAOYSA-N decalin Chemical compound C1CCCC2CCCCC21 NNBZCPXTIHJBJL-UHFFFAOYSA-N 0.000 title claims abstract description 182
- PXXNTAGJWPJAGM-UHFFFAOYSA-N vertaline Natural products C1C2C=3C=C(OC)C(OC)=CC=3OC(C=C3)=CC=C3CCC(=O)OC1CC1N2CCCC1 PXXNTAGJWPJAGM-UHFFFAOYSA-N 0.000 title claims abstract description 91
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000007789 gas Substances 0.000 claims abstract description 131
- 239000002904 solvent Substances 0.000 claims abstract description 57
- 238000003795 desorption Methods 0.000 claims abstract description 43
- 238000001179 sorption measurement Methods 0.000 claims abstract description 31
- 239000006096 absorbing agent Substances 0.000 claims abstract description 26
- 239000012530 fluid Substances 0.000 claims abstract description 22
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 68
- 238000001816 cooling Methods 0.000 claims description 43
- 229910052757 nitrogen Inorganic materials 0.000 claims description 34
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 25
- 239000001301 oxygen Substances 0.000 claims description 25
- 229910052760 oxygen Inorganic materials 0.000 claims description 25
- 239000007788 liquid Substances 0.000 claims description 7
- 125000004122 cyclic group Chemical group 0.000 claims description 4
- 238000010926 purge Methods 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 7
- 238000011084 recovery Methods 0.000 abstract description 3
- 239000002912 waste gas Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 5
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 239000000835 fiber Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000005662 Paraffin oil Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical group C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/002—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
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Of Gases By Adsorption (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention relates to the technical field of waste gas treatment, in particular to a method and a device for treating high-concentration decalin tail gas. A treatment device for high-concentration decalin tail gas comprises a primary condenser, a heat exchanger, a secondary condenser, a first solvent tank, an absorber, a heater, a condenser and a second solvent tank; the gas outlet of the first-stage condenser is sequentially communicated with a hot fluid channel of the heat exchanger and the second-stage condenser through a pipeline, the solvent outlet of the second-stage condenser is connected with the first solvent tank, and the gas outlet of the second-stage condenser is connected with a cold fluid channel of the heat exchanger and then is led into the adsorber through an adsorption pipeline; the tail gas outlet of the absorber is sequentially connected with the heater and the condenser, the solvent outlet of the condenser is connected with the second solvent tank, and the gas outlet of the condenser is connected with the heater and then is communicated with the desorption air inlet of the absorber through a desorption pipeline. The method and the device for treating the high-concentration decalin tail gas have the advantages of low energy consumption, high decalin recovery rate and standard emission of the tail gas.
Description
Technical Field
The invention relates to the technical field of waste gas treatment, in particular to a method and a device for treating high-concentration decalin tail gas.
Background
The high-performance polyethylene fiber is an important novel material for promoting the development of high-end technical industry as an important material for national military protective articles and aviation and aerospace urgent needs. The solvent used for producing the high-performance polyethylene fiber comprises decalin, paraffin oil, paraffin wax and kerosene, wherein a dry method route taking decalin as a solvent is taken as an optimal production route, decalin tail gas is produced by producing the high-performance polyethylene by taking decalin as a solvent, and the decalin tail gas is mainly nitrogen and decalin gas. At present, the domestic way of treating the high-concentration decalin tail gas is to recycle decalin by a compression condensation method, namely, the tail gas is compressed to a higher pressure, and meanwhile, the tail gas is required to be cooled to a lower temperature in a condensation section to ensure the recovery rate, so that the method has the defect of high comprehensive energy consumption.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a method and a device for treating high-concentration decalin tail gas, which have low energy consumption and high decalin recovery rate and realize standard emission of the tail gas.
In order to achieve the above purpose, the treatment method of the high-concentration decalin tail gas designed by the invention comprises the following steps:
1) Condensing and adsorbing high-concentration decalin tail gas
The high-concentration decalin tail gas is subjected to primary cooling treatment by a primary condenser and then is subjected to secondary cooling treatment by a secondary condenser, most decalin gas in the tail gas is condensed into decalin liquid solvent, small and medium parts of decalin gas and nitrogen in the tail gas are introduced into an absorber through an adsorption pipeline, the decalin gas is adsorbed by the absorber, and the nitrogen is recycled as desorption gas;
2) Desorption decalin solvent
After the adsorption saturation of the absorber, heating the nitrogen in the step 1) by a heater, introducing the heated nitrogen into the absorber for desorption treatment, cooling the desorbed decalin gas and the high-temperature nitrogen by a condenser, condensing the decalin gas into decalin solvent, introducing the decalin solvent into a second solvent tank, heating the cooled nitrogen by the heater, and introducing the cooled nitrogen into the absorber by a desorption pipeline for cyclic desorption of decalin;
3) Adsorber cooling
Stopping the heater when no decalin solvent flows out from the condensate port of the condenser, and directly introducing circulating nitrogen into the adsorber to cool the adsorber after cooling through the condenser.
In the preferred scheme, in the step 1), a heat exchanger is arranged between the first-stage condenser and the second-stage condenser, the high-concentration decalin tail gas is firstly subjected to first-stage cooling treatment by the first-stage condenser, then the tail gas after the first-stage cooling treatment is introduced into a hot fluid channel of the heat exchanger, finally the tail gas after the second-stage cooling treatment is introduced into the second-stage condenser for carrying out second-stage cooling treatment, and the tail gas after the first-stage cooling treatment is introduced into a cold fluid channel of the heat exchanger and the hot fluid channel of the heat exchanger for carrying out heat exchange, and then is introduced into an adsorber for carrying out adsorption treatment.
As a preferable scheme, in the step 1), a first oxygen concentration detector is arranged in the adsorption pipeline to monitor the oxygen content in the adsorption pipeline; and 2) replacing air in the purging pipeline and the adsorber with normal-temperature nitrogen before desorption treatment, wherein a second oxygen concentration detector is arranged in the desorption pipeline to monitor the oxygen content in the desorption pipeline.
The method for treating the high-concentration decalin tail gas is realized by a high-concentration decalin tail gas treatment device, and the high-concentration decalin tail gas treatment device comprises a primary condenser, a heat exchanger, a secondary condenser, a first solvent tank, an adsorber, a heater, a condenser and a second solvent tank; the gas outlet of the first-stage condenser is sequentially communicated with a hot fluid channel of the heat exchanger and the second-stage condenser through a pipeline, the solvent outlet of the second-stage condenser is connected with the first solvent tank, and the gas outlet of the second-stage condenser is connected with a cold fluid channel of the heat exchanger and then is led into the adsorber through an adsorption pipeline; the tail gas outlet of the absorber is sequentially connected with the heater and the condenser, the solvent outlet of the condenser is connected with the second solvent tank, and the gas outlet of the condenser is connected with the heater and then is communicated with the desorption air inlet of the absorber through a desorption pipeline.
A treatment device for high-concentration decalin tail gas comprises a primary condenser, a heat exchanger, a secondary condenser, a first solvent tank, an absorber, a heater, a condenser and a second solvent tank; the gas outlet of the first-stage condenser is sequentially communicated with a hot fluid channel of the heat exchanger and the second-stage condenser through a pipeline, the solvent outlet of the second-stage condenser is connected with the first solvent tank, and the gas outlet of the second-stage condenser is connected with a cold fluid channel of the heat exchanger and then is led into the adsorber through an adsorption pipeline; the tail gas outlet of the absorber is sequentially connected with the heater and the condenser, the solvent outlet of the condenser is connected with the second solvent tank, and the gas outlet of the condenser is connected with the heater and then is communicated with the desorption air inlet of the absorber through a desorption pipeline.
Preferably, the primary condenser is a plate-type, plate-fin-type or tube-type condenser; the secondary condenser is a plate type, plate-fin type or tube type condenser.
Preferably, the adsorption material of the adsorber is carbon fiber, activated carbon, honeycomb carbon, molecular sieve or resin adsorption material.
Preferably, a first oxygen concentration detector is arranged in the adsorption pipeline.
Preferably, a second oxygen concentration detector is arranged in the desorption pipeline.
The invention has the advantages that: compared with the prior art, the treatment method of the high-concentration decalin tail gas does not need a compressor for pressurization treatment, and meanwhile, nitrogen of the tail gas can be recycled, and the adsorption material after adsorption saturation is desorbed and regenerated for recycling. Specifically, the invention firstly adopts staged cooling to reduce the temperature of the tail gas, so that most of decalin gas in the tail gas is condensed into a liquid solvent, and the staged cooling is adopted to gradually reduce the temperature of the tail gas, thereby being beneficial to the condensation effect of the decalin gas and simultaneously reducing the load of a condenser.
And a heat exchanger is arranged between the primary condenser and the secondary condenser, heat exchange is carried out on the tail gas after primary cooling in a heat exchanger hot fluid channel and the tail gas after secondary cooling in a heat exchanger cold fluid channel, so that on one hand, the temperature of the tail gas after primary cooling is reduced, namely, the high-concentration decalin tail gas is additionally cooled between the primary cooling and the secondary cooling, the energy consumption of the secondary cooling is reduced, on the other hand, the temperature of the tail gas after the secondary cooling is increased, and the problem of poor adsorption effect caused by the tail gas with too low temperature entering an adsorber is avoided.
And finally, nitrogen in the tail gas is utilized for desorption and cyclic utilization, so that energy sources are saved, and energy consumption is reduced.
Drawings
FIG. 1 is a schematic view of a treatment apparatus for high-concentration decalin tail gas of the present invention;
the reference numerals of the components in the drawings are as follows: the device comprises a first-stage condenser 1, a heat exchanger 2, a second-stage condenser 3, a first fan 4, a first solvent tank 5, an absorber 6 (a tail gas inlet 6.1, a tail gas outlet 6.2 and a desorption gas inlet 6.3), a heater 7, a second fan 8, a condenser 9, a second solvent tank 10, a first oxygen concentration detector 11 and a second oxygen concentration detector 12.
Detailed Description
For a better understanding of the present invention, the following detailed description of the invention will be given with reference to the accompanying drawings and specific examples.
In order to solve the problem of high energy consumption in the existing technology for treating high-concentration decalin tail gas by adopting a pressurized condensation mode, the invention provides a treatment method of high-concentration decalin tail gas, and specifically, the method comprises the steps of firstly condensing and recovering decalin tail gas through a first-stage condenser and a second-stage condenser, condensing most decalin in the decalin tail gas into decalin liquid solvent, enabling the decalin tail gas to contain a small part of decalin and nitrogen tail gas, enabling the decalin tail gas to enter an adsorber, adsorbing the decalin by an adsorption medium, recycling the discharged nitrogen as desorption gas, and utilizing the nitrogen in the tail gas for desorption treatment in the desorption process, and cooling the desorbed decalin gas through the condenser to condense the decalin liquid solvent. The following will describe in detail preferred modes of the method for treating high-concentration decalin tail gas and the apparatus thereof according to the present invention by means of specific examples.
Examples
Referring to fig. 1, the treatment device for high-concentration decalin tail gas of the present invention comprises a primary condenser 1, a heat exchanger 2, a secondary condenser 3, a first fan 4, a first solvent tank 5, an adsorber 6, a heater 7, a second fan 8, a condenser 9, a second solvent tank 10, a first oxygen concentration detector 11, and a second oxygen concentration detector 12.
The gas inlet of the first-stage condenser 1 is connected with a high-concentration decalin tail gas pipeline, the gas outlet of the first-stage condenser 1 is sequentially communicated with a hot fluid channel of the heat exchanger 2 and the second-stage condenser 3 through a pipeline, the solvent outlet of the second-stage condenser 3 is connected with the first solvent tank 5, and the gas outlet of the second-stage condenser 3 is communicated with the tail gas inlet 6.1 of the adsorber 6 through an adsorption pipeline 13 and the first fan 4 after passing through a cold fluid channel of the heat exchanger 2; the tail gas outlet 6.2 of the adsorber 6 is connected with the heater 7 and the condenser 9 in sequence through a pipeline, the solvent outlet of the condenser 9 is connected with the second solvent tank 10, and the gas outlet of the condenser 9 is connected with the heater 7 and then is communicated with the desorption air inlet 6.3 of the adsorber 6 through a desorption pipeline 14 and the second fan 8.
The first oxygen concentration detector 11 is arranged in the adsorption pipeline 13 and is used as a basis for judging whether the oxygen content of the adsorption pipeline 13 and the adsorber bed layer is controlled within a safe range, and meanwhile, the oxygen content in the recovered nitrogen is controlled, so that the purity of the nitrogen is ensured.
The desorption pipe 14 is provided with a second oxygen concentration detector 12 as a basis for judging whether the oxygen content of the desorption pipe and the adsorber bed is controlled within a safe range.
The treatment method of the high-concentration decalin tail gas is realized by a treatment device of the high-concentration decalin tail gas, and specifically comprises the following steps of:
1) Condensing and adsorbing high-concentration decalin tail gas
The high-concentration decalin tail gas comprises nitrogen and decalin gas, the concentration of the decalin gas is high, the high-concentration decalin tail gas is subjected to primary cooling treatment by the primary condenser 1, the tail gas after primary cooling is introduced into a hot fluid channel of the heat exchanger 2, the tail gas after secondary cooling treatment is finally introduced into the secondary condenser 3 to be subjected to secondary cooling treatment, the temperature of the tail gas after secondary cooling treatment is reduced to 0 ℃, most decalin gas is condensed into decalin liquid solvent, the decalin liquid solvent flows out of a solvent outlet of the secondary condenser 3 and enters the first solvent tank 5, small part of decalin gas and nitrogen in the tail gas are discharged from a gas outlet of the secondary condenser 3 and then are introduced into a cold fluid channel of the heat exchanger 2 to be subjected to heat exchange with the tail gas after primary cooling, then the tail gas is introduced into the absorber 6 to be subjected to adsorption treatment under the action of the first fan 4 through the adsorption pipeline 13, and the decalin the tail gas is adsorbed by the absorber 6, and the nitrogen in the tail gas is recycled as desorption gas.
The first oxygen concentration detector 11 is arranged in the adsorption pipeline 13 to monitor the oxygen content in the adsorption pipeline 13, and is used as a basis for judging whether the oxygen content of the adsorption pipeline 13 and the adsorber bed is controlled within a safe range or not, and meanwhile, the oxygen content in the recovered nitrogen is controlled, so that the purity of the nitrogen is ensured.
The heat exchange is carried out on the tail gas after primary cooling in the heat exchanger 2 hot fluid channel and the tail gas after secondary cooling in the heat exchanger 2 cold fluid channel, so that on one hand, the temperature of the tail gas after primary cooling is reduced, namely, the high-concentration decalin tail gas is additionally cooled between the primary cooling and the secondary cooling, the energy consumption of the secondary cooling is reduced, on the other hand, the temperature of the tail gas after the secondary cooling is increased, and the problem of poor adsorption effect caused by the tail gas with too low temperature entering the adsorber 6 is avoided.
2) Desorption decalin solvent
After the adsorption saturation of the adsorber 6, the normal-temperature nitrogen in the step 1) is firstly replaced with the air in the purging pipeline and the adsorber, then the nitrogen is heated to 200 ℃ through the heater 7, and then is introduced into the adsorber 2 through the second fan 8 for desorption treatment, the decalin gas after desorption and the high-temperature nitrogen are cooled through the condenser 9, the decalin gas is condensed into decalin solvent, and then enters the second solvent tank 10, the cooled nitrogen is heated through the heater 7 and then is introduced into the adsorber 6 through the desorption pipeline 14 for cyclic desorption of decalin, and the desorption pipeline 14 is provided with a second oxygen concentration detector 12 for monitoring the oxygen content in the desorption pipeline 14.
When no condensate flows out from the condensate port of the condenser 9, the heater 7 is stopped, the circulating nitrogen is directly led into the absorber 6 to cool the absorber after being cooled by the condenser 9, and when the temperature of the absorber 6 is reduced to about 40 ℃, the second fan 8 is closed to enter a standby state.
The above examples illustrate only one embodiment of the invention, which is described in more detail and is not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (1)
1. The method for treating the high-concentration decalin tail gas is characterized by comprising the following steps of:
1) Condensing and adsorbing high-concentration decalin tail gas
The high-concentration decalin tail gas is subjected to primary cooling treatment by a primary condenser (1) and then is subjected to secondary cooling treatment by a secondary condenser (3), most decalin gas in the tail gas is condensed into decalin liquid solvent, small and medium parts of decalin gas and nitrogen in the tail gas are introduced into an absorber (6) through an adsorption pipeline (13), the decalin gas is adsorbed by the absorber (6), and the nitrogen is recycled as desorption gas;
2) Desorption decalin solvent
After the adsorption saturation of the absorber (6), nitrogen in the step 1) is heated by a heater (7) and then is led into the absorber (6) for desorption treatment, decalin gas after desorption and high-temperature nitrogen are cooled by a condenser (9) and then condensed into decalin solvent, the decalin solvent enters a second solvent tank (10), and cooled nitrogen is heated by the heater (7) and then is led into the absorber (6) through a desorption pipeline (14) for cyclic desorption of decalin;
3) Adsorber cooling
Stopping the heater (7) when no decalin solvent flows out from the condensate port of the condenser (9), and directly introducing circulating nitrogen into the adsorber (6) to cool the adsorber after cooling through the condenser (9);
in the step 1), a heat exchanger (2) is arranged between the first-stage condenser (1) and the second-stage condenser (3), the high-concentration decalin tail gas is subjected to first-stage cooling treatment by the first-stage condenser (1), then the tail gas after the first-stage cooling is introduced into a hot fluid channel of the heat exchanger (2), finally the tail gas after the second-stage cooling treatment is introduced into the second-stage condenser (3) for second-stage cooling treatment, and the tail gas after the second-stage cooling treatment is introduced into a cold fluid channel of the heat exchanger (2) and the tail gas after the first-stage cooling in the hot fluid channel of the heat exchanger (2) for heat exchange and then is introduced into an adsorber (6) for adsorption treatment;
the step 1), the adsorption pipeline (13) is provided with a first oxygen concentration detector (11) to monitor the oxygen content in the adsorption pipeline (13); the step 2) is characterized in that before desorption treatment, normal-temperature nitrogen is used for replacing air in a purging pipeline and an absorber (6), and a second oxygen concentration detector (12) is arranged in a desorption pipeline (14) to monitor the oxygen content in the desorption pipeline (14);
the treatment method of the high-concentration decalin tail gas is realized by a treatment device of the high-concentration decalin tail gas, and the treatment device of the high-concentration decalin tail gas comprises a primary condenser (1), a heat exchanger (2), a secondary condenser (3), a first solvent tank (5), an absorber (6), a heater (7), a condenser (9) and a second solvent tank (10); the gas outlet of the first-stage condenser (1) is sequentially communicated with a hot fluid channel of the heat exchanger (2) and the second-stage condenser (3) through a pipeline, the solvent outlet of the second-stage condenser (3) is connected with the first solvent tank (5), and the gas outlet of the second-stage condenser (3) is connected with a cold fluid channel of the heat exchanger (2) and then is led into the adsorber (6) through an adsorption pipeline (13); the tail gas outlet (6.2) of the adsorber (6) is sequentially connected with the heater (7) and the condenser (9), the solvent outlet of the condenser (9) is connected with the second solvent tank (10), and the gas outlet of the condenser (9) is connected with the heater (7) and then is communicated with the desorption air inlet (6.3) of the adsorber (6) through the desorption pipeline (14).
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| CN107198913A (en) * | 2016-03-18 | 2017-09-26 | 中国石油化工股份有限公司 | Decahydronaphthalene washes recovery process in waste gas |
| CN209204709U (en) * | 2018-09-29 | 2019-08-06 | 武汉旭日华环保科技股份有限公司 | The processing unit of high concentration decahydronaphthalene tail gas |
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