CN113577996A - VOCs device is handled to solution absorption method - Google Patents

VOCs device is handled to solution absorption method Download PDF

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Publication number
CN113577996A
CN113577996A CN202111025198.5A CN202111025198A CN113577996A CN 113577996 A CN113577996 A CN 113577996A CN 202111025198 A CN202111025198 A CN 202111025198A CN 113577996 A CN113577996 A CN 113577996A
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China
Prior art keywords
absorption
tower
heat exchanger
vocs
solution
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Pending
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CN202111025198.5A
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Chinese (zh)
Inventor
张全来
雷逸群
陈琪
冷文明
李楠
李宗勇
储广峰
回毅
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WUHAN YUANFANG SCIENCE & TECHNOLOGY Co Ltd OF CHINA SANJIANG SPACE GROUP
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WUHAN YUANFANG SCIENCE & TECHNOLOGY Co Ltd OF CHINA SANJIANG SPACE GROUP
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Priority to CN202111025198.5A priority Critical patent/CN113577996A/en
Publication of CN113577996A publication Critical patent/CN113577996A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/18—Absorbing units; Liquid distributors therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1425—Regeneration of liquid absorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1487—Removing organic compounds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

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  • 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)
  • Treating Waste Gases (AREA)

Abstract

The invention relates to a device for treating VOCs (volatile organic compounds) by a solution absorption method. Including absorption tower, regenerator column, regeneration top of the tower separator, fan, water pump, electric cabinet, pipeline annex and valve instrument, the fan sends into the absorption tower with VOCs through the pipe connection in, the regenerator column passes through water pump, heat exchanger and pipeline and is connected with the absorption tower, regeneration top of the tower separator passes through heat exchanger and pipeline and is connected with the regenerator column, and VOCs waste gas absorbs through the absorption tower, and gas evacuation up to standard. The beneficial effects are as follows: the treatment method of the invention avoids the generation of secondary pollutants, and the stored VOCs can be recycled; meanwhile, heat exchange can be carried out between the absorption liquid rich solution and the absorption liquid barren solution through a heat exchanger, so that the resource utilization rate is improved, the absorption capacity of the regenerated absorption liquid barren solution is recovered through cooling, VOCs can be repeatedly absorbed after the regenerated absorption liquid barren solution returns to the absorption tower, and the generation of hazardous waste is avoided through the recycling mode; the absorption liquid has wide application range and good absorption effect.

Description

VOCs device is handled to solution absorption method
Technical Field
The invention relates to the field of VOCs waste gas treatment, in particular to a device for treating VOCs by a solution absorption method.
Background
VOCs (volatile organic compounds) are a large component of air pollution, such as industries which can generate VOCs (volatile organic compounds) in chemical industry, printing and dyeing and the like, and waste gas of the industries can be discharged only when meeting national or local standards, so that the VOCs need to be treated. In the traditional VOCs treatment methods, a combustion oxidation method and an adsorption method are two most widely applied VOCs treatment processes, the two processes have good effects on treatment of most VOCs, but the two processes still have non-negligible defects, for example, secondary pollutants may be generated by the combustion oxidation method, hazardous waste products generated by the adsorption method need special disposal, and the VOCs cannot be reused.
The absorption method is characterized in that VOCs in the waste gas are absorbed into absorption liquid through a similar compatibility principle, so that the effect of purifying the waste gas is achieved, and then the waste gas is analyzed out through heating and temperature rise, but in the traditional process, a heating device needs to be independently arranged to heat the absorption liquid, so that the treatment cost is increased, the equipment volume is also increased, the heat energy in the waste gas is not well utilized, and the resource waste is caused; VOCs are not recycled after being separated; and the application range of the traditional absorption liquid is single, the same absorption liquid can only absorb one or two kinds of VOCs waste gas well, and especially for organic waste gas containing methanol, propylene oxide and ethanol, the traditional absorption liquid can not absorb well, and the treatment efficiency is low.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention absorbs VOCs by specially-prepared high-boiling-point absorption liquid, the absorption liquid rich solution after saturated absorption is regenerated by heating, the VOCs are separated out and stored for recycling, and the separated absorption liquid lean solution can be recycled. The technical scheme of the invention is as follows:
a device for treating VOCs by a solution absorption method, which is characterized in that: the absorption tower comprises an absorption tower, a regeneration tower top separator, a fan, a water pump, an electric cabinet, pipeline accessories and a valve instrument, wherein the fan is connected with the absorption tower through a pipeline to send VOCs into the absorption tower, the regeneration tower is connected with the absorption tower through the water pump, a heat exchanger and a pipeline, the regeneration tower top separator is connected with the regeneration tower through the heat exchanger and the pipeline, VOCs waste gas is absorbed by the absorption tower and is exhausted after reaching standards, absorption liquid rich liquid enters the regeneration tower and is heated and regenerated through an electric heater, regenerated absorption liquid lean liquid returns to the absorption tower to recycle absorption waste gas, and regenerated waste gas enters the regeneration tower top separator to be collected; wherein
The absorption tower comprises a bottom tank body, tower sections, a tower tray distributor, a temperature sensor and a liquid level meter;
the regeneration tower comprises a bottom tank body, an electric heater, a tower section, a tower tray distributor, a temperature sensor and a liquid level meter;
the number of the water pumps is three, the first water pump is connected with the bottom of the absorption tower and the middle of the regeneration tower through pipelines and valves, the second water pump is connected with the bottom of the regeneration tower and the top of the absorption tower through pipelines and valves, and the third water pump is connected with the bottom of the separator at the top of the regeneration tower and the top of the regeneration tower through pipelines and valves;
the heat exchanger comprises a first heat exchanger, the first heat exchanger is connected between a first water pump and the middle part of the regeneration tower through a pipeline, and the first heat exchanger exchanges heat between the normal-temperature absorption liquid rich solution and the high-temperature absorption liquid lean solution.
The absorption tower further comprises a second heat exchanger, the second heat exchanger is connected between the top of the absorption tower and a second water pump through a pipeline, and the second heat exchanger exchanges heat between the high-temperature absorption liquid barren solution and external cold water.
The system further comprises a third heat exchanger, wherein the third heat exchanger is connected between the top of the regeneration tower and the top of the absorption tower through a pipeline, and exchanges heat between the evaporation gas at the top of the regeneration tower and external cold water.
And the absorption liquid storage tank is connected with the first heat exchanger and the bottom of the regeneration tower through pipelines respectively.
Further, the device also comprises a recovery tank which is used for recovering the gas separated from the tower top separator of the regeneration tower.
Further, the system also comprises a frozen brine machine which respectively provides heat exchange medium cold water for the second heat exchanger and the third heat exchanger.
Further, the inlet of the fan is connected with the VOCs inlet through a pipeline and a valve, and the outlet of the fan is connected with the absorption tower through a pipeline, a flowmeter, a pressure gauge and a valve.
And the absorption tower, the regeneration tower top separator, the fan, the water pump, the heat exchanger, the electric heater, the electric cabinet, the pipeline accessory and the valve instrument are all arranged in the cabinet body.
Further, the absorption liquid in the absorption liquid storage tank is a mixed solution of water and ethylene glycol, and the volume of the ethylene glycol in the mixed solution of water and ethylene glycol is 5-80%.
Further, the preferable volume ratio of the glycol in the mixed solution of water and glycol is 10-50%.
Compared with the prior art, the invention has the advantages that:
1. the absorption of VOCs by the absorption liquid is a physical means, and secondary pollution cannot be generated;
2. the absorption liquid is recycled in the device, so that the cost is reduced, and no dangerous waste is generated;
3. through the arrangement of the heat exchanger, the rich solution and the lean solution of the absorption solution can be subjected to temperature exchange, so that the resource utilization rate is greatly improved;
4. the absorption liquid provided by the invention can be suitable for waste gases such as methanol, propylene oxide, ethanol and the like, and has a wide application range;
5. the absorbed VOCs can be recycled and stored, the environment is protected, the recycling is convenient, and the economic value is good.
In a word, VOCs are absorbed by a special high boiling point solution, and the absorption liquid rich solution after saturated absorption is regenerated by heating to separate out the VOCs for storage and recovery. The physical separation method avoids the generation of secondary pollutants, and the stored VOCs can be recycled; meanwhile, heat exchange can be carried out between the absorption liquid rich solution and the absorption liquid barren solution through a heat exchanger, so that the resource utilization rate is improved, the absorption capacity of the regenerated absorption liquid barren solution is recovered through cooling, VOCs can be repeatedly absorbed after the regenerated absorption liquid barren solution returns to the absorption tower, and the generation of hazardous waste is avoided through the recycling mode; the absorption liquid has wide application range and good absorption effect.
Drawings
FIG. 1 is a flow chart of a process for a device for treating VOCs by a solution absorption method according to the present invention;
FIG. 2 is a graph showing the results of an absorption test in which the volume ratio of ethylene glycol in the absorbing solution of the example of the present invention is 10%;
FIG. 3 is a graph showing the results of an absorption test in which the volume ratio of ethylene glycol in the absorbing solution of the example of the present invention is 15%;
FIG. 4 is a graph showing the results of an absorption test in which the volume ratio of ethylene glycol in the absorbing solution of the example of the present invention is 20%;
FIG. 5 is a graph showing the results of an absorption test in which the volume ratio of ethylene glycol in the absorbent solution in the example of the present invention is 31%;
FIG. 6 is a graph showing the results of an absorption test in which the volume ratio of ethylene glycol in the absorbing solution of the example of the present invention is 50%;
FIG. 7 is a graph showing the results of an absorption test at a flow rate of 0 in the absorbent of the comparative example of the present invention;
FIG. 8 is a graph showing the results of an absorption test in which the volume ratio of ethylene glycol in the absorbent liquid of comparative example of the present invention is 0%;
FIG. 9 is a graph showing the results of an absorption test in which the volume ratio of ethylene glycol in the absorbent liquid of comparative example of the present invention is 100%.
The system comprises an absorption tower 1, a regeneration tower 2, a regeneration tower top separator 3, a fan 4, a first water pump 5, a second water pump 51, a third water pump 52, a first heat exchanger 6, a second heat exchanger 61, a third heat exchanger 62, an electric heater 7, a liquid level meter 8, a chilled brine machine 9, an absorption liquid storage tank 10, a temperature sensor 11, a recovery tank 12 and a valve 13.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1, the device for absorbing VOCs by a solution absorption method provided by the invention comprises an absorption tower, a regeneration tower top separator, a fan, a water pump, an electric cabinet, pipeline accessories and a valve instrument, wherein the fan is connected with the regeneration tower through a pipeline to send VOCs into the absorption tower, the regeneration tower is connected with the absorption tower through the water pump, a heat exchanger and a pipeline, the regeneration tower top separator is connected with the regeneration tower through the heat exchanger and the pipeline, VOCs waste gas is absorbed by the absorption tower, standard gas is exhausted, absorption liquid rich liquid enters the regeneration tower to be heated and regenerated through an electric heater, regenerated absorption liquid lean liquid returns to the absorption tower to recycle absorption waste gas, and regenerated waste gas enters the regeneration tower top separator to be collected; wherein
The absorption tower comprises a bottom tank body, tower sections, a tower tray distributor, a temperature sensor and a liquid level meter;
the regeneration tower comprises a bottom tank body, an electric heater, a tower section, a tower tray distributor, a temperature sensor and a liquid level meter;
the number of the water pumps is three, the first water pump is connected with the bottom of the absorption tower and the middle of the regeneration tower through pipelines and valves, the second water pump is connected with the bottom of the regeneration tower and the top of the absorption tower through pipelines and valves, and the third water pump is connected with the bottom of the separator at the top of the regeneration tower and the top of the regeneration tower through pipelines and valves;
the heat exchanger comprises a first heat exchanger, the first heat exchanger is connected between a first water pump and the middle part of the regeneration tower through a pipeline, and the first heat exchanger exchanges heat between the normal-temperature absorption liquid rich solution and the high-temperature absorption liquid lean solution to cool the absorption liquid lean solution, so that the absorption capacity of the absorption liquid is improved, the absorption liquid can be recycled, and the utilization rate of the absorption liquid is improved; meanwhile, the rich solution of the absorption liquid is heated after heat exchange and enters the regeneration tower, so that the working energy rate of a heater in the regeneration tower can be reduced, and the treatment cost is reduced.
The absorption tower is characterized by further comprising a second heat exchanger, wherein the second heat exchanger is connected between the top of the absorption tower and a second water pump through a pipeline, and the second heat exchanger exchanges heat between high-temperature absorption liquid barren solution and external cold water. The absorption liquid barren liquor is cooled again and then enters the absorption tower to absorb the VOCs again, and the absorption capacity of the absorption liquid is further improved.
Still include the third heat exchanger, the third heat exchanger passes through the tube coupling between regenerator column top and absorption tower top, the third heat exchanger carries out the heat transfer with regenerator column top boil-off gas and outside cold water, can condense waste gas into liquid, and the unified recovery of being convenient for is handled, realizes that organic waste gas's recovery does benefit to again.
The absorption liquid storage tank is connected with the first heat exchanger and the bottom of the regeneration tower through pipelines respectively and is used for collecting barren liquid generated by the regeneration tower and providing absorption liquid for the absorption tower.
And the absorption liquid in the absorption liquid storage tank is a mixed solution of water and glycol.
The absorption liquid is a mixed solution with the volume ratio of 5-80% of glycol, and experiments prove that the absorption liquid provided by the invention has a good absorption effect particularly on waste gases such as methanol, propylene oxide, ethanol and the like.
The preferable proportion is that the volume ratio of the ethylene glycol is 31-50%.
The system also comprises a frozen brine machine which respectively provides heat exchange medium-cold water for the second heat exchanger and the third heat exchanger.
The inlet of the fan is connected with the VOCs inlet through a pipeline and a valve, and the outlet of the fan is connected with the absorption tower through a pipeline, a flowmeter, a pressure gauge and a valve.
The absorption tower, the regeneration tower top separator, the fan, the water pump, the heat exchanger, the electric heater, the electric cabinet, the pipeline accessories and the valve instrument are all installed in the cabinet body, the layout is reasonable and compact, and the functions of transportation, field installation, maintenance and repair of the whole equipment are facilitated.
The specific process flow of the invention is as follows:
VOCs waste gas passes through the fan entry and carries the absorption tower, and the absorption liquid passes through the second water pump, after the second heat exchanger cooling, sprays from the absorption tower top, carries out the mass transfer with the waste gas that gets into the absorption tower spraying the in-process, and organic waste gas is absorbed in the absorption liquid. The purified waste gas is discharged and exhausted through the top of the absorption tower. The absorption liquid absorbing the organic waste gas is also called rich liquid and falls to the bottom of the absorption tower, the absorption liquid is conveyed to a first heat exchanger through a first water pump to exchange heat with the absorption liquid from a regeneration tower, also called lean liquid, and then the lean liquid is cooled through a second water pump through a second heat exchanger and conveyed to the absorption tower to be continuously absorbed. The rich liquid enters a regeneration tower after being heated, an electric heater is arranged at the bottom of the regeneration tower, the temperature of the rich liquid can be continuously heated to 50-200 ℃ (arranged according to different boiling points of different organic waste gases), the waste gas passes through a third heat exchanger after being regenerated (rectified) by the regeneration tower, the condensed and liquefied waste gas enters a separator at the top of the regeneration tower, the liquefied liquid part flows back to the regeneration tower through a third water pump, and the gas part is conveyed to a recovery tank to be recycled.
The invention provides five different proportions of water and glycol mixed absorption liquid and absorption effects thereof, which are as follows:
1. the volume ratio of ethylene glycol mixture in the absorption liquid is 10%, the absorption liquid is adopted to carry out an absorption test in the absorption device of the patent, and the gas inlet flow of waste gas (mainly comprising the waste gas of methanol, propylene oxide, ethanol and the like) is 30m3H, intake VOCs exhaust concentration: 5000mg/m3The flow rate of the absorption liquid is 1L/min, and the temperature is-15 ℃; the absorption test results obtained are shown in FIG. 2;
2. the volume ratio of ethylene glycol in the absorption liquid is 15%, the absorption liquid is adopted to carry out an absorption test in the absorption device of the patent, and the waste gas inlet flow is 30m3H, intake VOCs exhaust concentration: 5000mg/m3The flow rate of the absorption liquid is 1L/min, and the temperature is-15 ℃; the results of the absorption test obtained are shown in FIG. 3.
3. The volume ratio of ethylene glycol in the absorption liquid is 20%, the absorption liquid is adopted to carry out an absorption test in the absorption device of the patent, and the waste gas inlet flow is 30m3H, intake VOCs exhaust concentration: 5000mg/m3The flow rate of the absorption liquid is 1L/min, and the temperature is-15 ℃; the results of the absorption test obtained are shown in FIG. 4.
4. The volume ratio of ethylene glycol in the absorption liquid is 31 percent, the absorption liquid is adopted to carry out an absorption test in the absorption device of the patent, and the waste gas inlet flow is 30m3H, intake VOCs exhaust concentration: 5000mg/m3The flow rate of the absorption liquid is 1L/min, and the temperature is-15 ℃; the results of the absorption test obtained are shown in FIG. 5.
5. The volume ratio of the ethylene glycol in the absorption liquid is 50%, the absorption liquid is adopted to carry out an absorption test in the absorption device of the patent, and the waste gas inlet flow is 30m3H, intake VOCs exhaust concentration: 5000mg/m3The flow rate of the absorption liquid is 1L/min, and the temperature is-15 ℃; the results of the absorption test obtained are shown in FIG. 6.
The invention also provides a comparative example, in order to compare the absorption effect of the absorption liquid and add a blank test, the flow of the absorption liquid is zero, and other test conditions and steps are consistent according to the test of the water and glycol mixed absorption liquid. The results of the absorption test are shown in FIG. 7.
The invention also provides another comparative example, which is used for inspecting the absorption effect of pure water on waste gas, wherein the volume ratio of glycol in the absorption liquid is 0%, and other test conditions and steps are consistent with those of the mixed absorption liquid of water and glycol. The results of the absorption test are shown in FIG. 8.
The invention also provides another comparative example for investigating the absorption effect of pure ethylene glycol on waste gas. The volume ratio of the glycol in the absorption liquid is 100 percent, and other test conditions and steps are consistent with the test conditions of the mixed absorption liquid of water and glycol. The results of the absorption test are shown in FIG. 9.
It can be seen from five different proportions of the water and ethylene glycol mixed absorption liquid and the test results of three comparative examples (fig. 2-fig. 9) that the absorption effect of the water and ethylene glycol mixed absorption liquid provided by the invention on waste gases such as methanol, propylene oxide, ethanol and the like is obviously higher than that of pure water and pure ethylene glycol, and the emission concentration can meet the requirements of national emission standards.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A device for treating VOCs by a solution absorption method, which is characterized in that: the absorption tower comprises an absorption tower, a regeneration tower top separator, a fan, a water pump, an electric cabinet, pipeline accessories and a valve instrument, wherein the fan is connected with the absorption tower through a pipeline to send VOCs into the absorption tower, the regeneration tower is connected with the absorption tower through the water pump, a heat exchanger and a pipeline, the regeneration tower top separator is connected with the regeneration tower through the heat exchanger and the pipeline, VOCs waste gas is absorbed by the absorption tower and is exhausted after reaching standards, absorption liquid rich liquid enters the regeneration tower and is heated and regenerated through an electric heater, regenerated absorption liquid lean liquid returns to the absorption tower to recycle absorption waste gas, and regenerated waste gas enters the regeneration tower top separator to be collected; wherein
The absorption tower comprises a bottom tank body, tower sections, a tower tray distributor, a temperature sensor and a liquid level meter;
the regeneration tower comprises a bottom tank body, an electric heater, a tower section, a tower tray distributor, a temperature sensor and a liquid level meter;
the number of the water pumps is three, the first water pump is connected with the bottom of the absorption tower and the middle of the regeneration tower through pipelines and valves, the second water pump is connected with the bottom of the regeneration tower and the top of the absorption tower through pipelines and valves, and the third water pump is connected with the bottom of the separator at the top of the regeneration tower and the top of the regeneration tower through pipelines and valves;
the heat exchanger comprises a first heat exchanger, the first heat exchanger is connected between a first water pump and the middle part of the regeneration tower through a pipeline, and the first heat exchanger exchanges heat between the normal-temperature absorption liquid rich solution and the high-temperature absorption liquid lean solution.
2. An apparatus for treating VOCs by solution absorption according to claim 1, wherein: the absorption tower is characterized by further comprising a second heat exchanger, wherein the second heat exchanger is connected between the top of the absorption tower and a second water pump through a pipeline, and the second heat exchanger exchanges heat between high-temperature absorption liquid barren solution and external cold water.
3. An apparatus for treating VOCs by solution absorption according to claim 2, wherein: the system also comprises a third heat exchanger, wherein the third heat exchanger is connected between the top of the regeneration tower and the top of the absorption tower through a pipeline, and exchanges heat between the evaporation gas at the top of the regeneration tower and external cold water.
4. An apparatus for treating VOCs by solution absorption according to claim 3, wherein: the absorption liquid storage tank is connected with the bottom of the first heat exchanger and the bottom of the regeneration tower through pipelines.
5. An apparatus for treating VOCs by solution absorption according to claim 4, wherein: the device also comprises a recovery tank used for recovering the gas separated from the tower top separator of the regeneration tower.
6. An apparatus for treating VOCs by solution absorption according to any one of claims 2 to 5, wherein: the system also comprises a frozen brine machine which respectively provides heat exchange medium-cold water for the second heat exchanger and the third heat exchanger.
7. An apparatus for treating VOCs by solution absorption according to claim 1, wherein: the inlet of the fan is connected with the VOCs inlet through a pipeline and a valve, and the outlet of the fan is connected with the absorption tower through a pipeline, a flowmeter, a pressure gauge and a valve.
8. An apparatus for treating VOCs by solution absorption according to claim 1, wherein: the absorption tower, the regeneration tower top separator, the fan, the water pump, the heat exchanger, the electric heater, the electric cabinet, the pipeline accessory and the valve instrument are all arranged in the cabinet body.
9. An apparatus for treating VOCs by solution absorption according to claim 4, wherein: the absorption liquid in the absorption liquid storage tank is a mixed solution of water and glycol, and the volume ratio of the glycol in the mixed solution of water and glycol is 5-80%.
10. An apparatus for treating VOCs by solution absorption according to claim 9, wherein: the preferable volume ratio of the ethylene glycol in the mixed solution of the water and the ethylene glycol is 31-50%.
CN202111025198.5A 2021-09-02 2021-09-02 VOCs device is handled to solution absorption method Pending CN113577996A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117619086A (en) * 2023-12-02 2024-03-01 广州市帝东环保科技有限公司 VOCs recovery device and recovery method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117619086A (en) * 2023-12-02 2024-03-01 广州市帝东环保科技有限公司 VOCs recovery device and recovery method thereof
CN117619086B (en) * 2023-12-02 2024-04-26 广州市帝东环保科技有限公司 VOCs recovery device and recovery method thereof

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