CN112807931A - Active carbon nitrogen desorption system and all-in-one - Google Patents
Active carbon nitrogen desorption system and all-in-one Download PDFInfo
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- CN112807931A CN112807931A CN202011637899.XA CN202011637899A CN112807931A CN 112807931 A CN112807931 A CN 112807931A CN 202011637899 A CN202011637899 A CN 202011637899A CN 112807931 A CN112807931 A CN 112807931A
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- 238000003795 desorption Methods 0.000 title claims abstract description 72
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 title claims abstract description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 162
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 119
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 70
- 239000002904 solvent Substances 0.000 claims abstract description 33
- 238000010438 heat treatment Methods 0.000 claims abstract description 30
- 238000011084 recovery Methods 0.000 claims abstract description 22
- 238000009833 condensation Methods 0.000 claims abstract description 21
- 230000005494 condensation Effects 0.000 claims abstract description 21
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 238000012544 monitoring process Methods 0.000 claims description 32
- 239000007789 gas Substances 0.000 claims description 26
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 22
- 238000001179 sorption measurement Methods 0.000 claims description 13
- 238000000926 separation method Methods 0.000 claims description 10
- 238000004880 explosion Methods 0.000 claims description 6
- 238000013022 venting Methods 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 5
- 238000010926 purge Methods 0.000 claims description 3
- 230000001172 regenerating effect Effects 0.000 claims description 2
- 238000002429 nitrogen sorption measurement Methods 0.000 claims 1
- 230000008929 regeneration Effects 0.000 abstract description 7
- 238000011069 regeneration method Methods 0.000 abstract description 7
- 238000006073 displacement reaction Methods 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 3
- 239000012855 volatile organic compound Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 239000002912 waste gas Substances 0.000 description 3
- 238000000746 purification Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000817 safety factor Toxicity 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- B01D53/02—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
- 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
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
- B01D2259/4009—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating using hot gas
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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)
- Treating Waste Gases (AREA)
Abstract
The invention discloses an active carbon nitrogen desorption system and an integrated machine, which comprise a nitrogen displacement system, a nitrogen circulating heating system, a solvent condensation recovery system and an active carbon desorption box, wherein the nitrogen displacement system, the active carbon desorption box, the nitrogen circulating heating system and the solvent condensation recovery system are sequentially connected through pipelines; the nitrogen replacement system is used for inputting nitrogen into the activated carbon desorption box; the nitrogen circulating heating system is used for providing heat energy required by desorption; the solvent condensation recovery system is used for condensing solvent steam into a liquid state and then recovering the solvent steam. The advantages are that: this set of device is through on-the-spot to useless active carbon nitrogen desorption regeneration for useless active carbon repeatedly usable. Solves the problem of waste active carbon treatment.
Description
Technical Field
The invention relates to an activated carbon nitrogen desorption system and an integrated machine, and belongs to the technical field of VOCS (volatile organic compounds) waste gas treatment.
Background
The existing VOCS purification device mostly adopts an activated carbon adsorption device, and most of the activated carbon adsorption devices do not adopt an online desorption device based on cost reasons and safety factors. With the saturation of the activated carbon adsorption VOCS, the performance of the activated carbon adsorption device can not meet the requirement of waste gas purification, the activated carbon can only be treated as dangerous waste, and the maintenance cost of a user is higher.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an activated carbon nitrogen desorption system and an integrated machine.
In order to solve the technical problem, the invention provides an activated carbon nitrogen desorption system which is characterized by comprising a nitrogen replacement system, a nitrogen circulating heating system, a solvent condensation recovery system and an activated carbon desorption box, wherein the nitrogen replacement system, the activated carbon desorption box, the nitrogen circulating heating system and the solvent condensation recovery system are sequentially connected through pipelines;
the nitrogen replacement system is used for inputting nitrogen into the activated carbon desorption box;
the nitrogen circulating heating system is used for providing heat energy required by desorption;
the solvent condensation recovery system is used for condensing solvent steam into a liquid state and then recovering the solvent steam.
The system further comprises a safety protection and monitoring system, wherein the safety protection and monitoring system comprises a safety protection module and a safety monitoring module;
the device comprises a safety protection module, a control module and a control module, wherein the safety protection module is used for explosion venting of a regenerative carbon box, pressure relief of a circulating pipeline, nitrogen spraying fire control and emergency treatment;
the safety monitoring module is used for monitoring the temperature and pressure of the regenerated carbon box and the concentration of VOCS at an outlet, monitoring public works, monitoring the temperature and pressure of pipelines in the nitrogen circulating heating system and monitoring the concentration of combustible gas in the system.
Furthermore, the device also comprises an electric control module, wherein the electric control module is controlled by a PLC.
Further, the nitrogen gas replacement system includes nitrogen gas jar and the active carbon adsorption case through the tube coupling, before the desorption, through nitrogen gas jar output nitrogen gas, carries out nitrogen gas through the active carbon adsorption case and sweeps the replacement to entire system, and after oxygen content reached the setting value in the system, nitrogen gas jar stopped output nitrogen gas, carries out the desorption.
Further, the nitrogen circulating heating system comprises a circulating fan, a gas-gas heat exchanger and a nitrogen heating module;
the output end of the circulating fan is connected with a first input end of the gas-gas heat exchanger through a pipeline, the first output end of the gas-gas heat exchanger is connected with a solvent condensation recovery system through a pipeline, a second output end of the gas-gas heat exchanger is connected with an input end of the nitrogen heating module through a pipeline, the output end of the nitrogen heating module is connected with a second input end of the activated carbon desorption box through a pipeline, the first input end of the activated carbon desorption box is connected with the nitrogen replacement system through a pipeline, and the output end of the activated carbon desorption box is connected with a second input end of the gas-gas heat exchanger through a pipeline.
Furthermore, the emergency activated carbon box is further included, and the input end of the emergency activated carbon box is connected with the output end of the circulating fan.
Further, the solvent condensation recovery system comprises a first-stage condenser, a second-stage condenser and a gas-liquid separation storage tank;
the input of one-level condenser is through the first output of pipeline connecing gas-gas heat exchanger, and the output of one-level condenser is through the input of pipeline connecing the second grade condenser, and the output of second grade condenser is through the input that the pipeline connects the gas-liquid separation storage tank, and the output of gas-liquid separation storage tank connects circulating fan's input through the pipeline.
The utility model provides an active carbon nitrogen desorption all-in-one, includes the box, be equipped with in the box the system.
The invention achieves the following beneficial effects:
this set of device is through on-the-spot to useless active carbon nitrogen desorption regeneration for useless active carbon repeatedly usable. Solves the problem of waste active carbon treatment.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
FIG. 2 is a schematic front view of the kiosk of the present invention;
FIG. 3 is a schematic top view of the kiosk of the present invention.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the 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.
As shown in fig. 1, an activated carbon nitrogen desorption system comprises a nitrogen displacement system, a nitrogen circulation heating system, a solvent condensation recovery system and an activated carbon desorption box, wherein the nitrogen displacement system, the nitrogen circulation heating system, the solvent condensation recovery system, the activated carbon desorption box, the nitrogen circulation heating system and the solvent condensation recovery system are sequentially connected through pipelines;
the nitrogen replacement system is used for inputting nitrogen into the activated carbon desorption box;
the nitrogen circulating heating system is used for providing heat energy required by desorption;
the solvent condensation recovery system is used for condensing solvent steam into a liquid state and then recovering the solvent steam.
The system also comprises a safety protection and monitoring system, wherein the safety protection and monitoring system comprises a safety protection module and a safety monitoring module;
the system comprises a safety protection module, a regeneration carbon box, a circulation pipeline, a nitrogen spraying fire control module and an emergency treatment module, wherein the safety protection module is used for explosion venting of the regeneration carbon box, pressure relief of the circulation pipeline, nitrogen spraying fire control and emergency treatment (for example, when the system is over-temperature and over-pressure, a pressure relief valve of an emergency activated carbon box is opened to empty, and a desorption fan is stopped to operate);
the safety monitoring module is used for monitoring the temperature, the pressure and the VOCS concentration of an outlet of the regeneration carbon box, monitoring public works, monitoring the temperature and the pressure of pipelines and monitoring the concentration of combustible gas in the system. The system ensures the safe and stable operation of the system through the double protection.
The device is characterized by further comprising an electric control module, wherein the electric control module is controlled by a PLC (programmable logic controller), optimizes desorption parameters by applying engineering test data, and ensures safe, effective and economic operation of a desorption process.
The nitrogen gas replacement system comprises a nitrogen gas tank and an activated carbon adsorption tank which are connected through a pipeline, nitrogen gas is output through the nitrogen gas tank before desorption, nitrogen gas purging replacement is carried out on the whole integrated machine through the activated carbon adsorption tank, and the nitrogen gas tank continues to output nitrogen gas after replacement for desorption.
The nitrogen circulating heating system comprises a circulating fan, a gas-gas heat exchanger and a nitrogen heating module;
the output end of the circulating fan is connected with a first input end of the gas-gas heat exchanger through a pipeline, the first output end of the gas-gas heat exchanger is connected with a solvent condensation recovery system through a pipeline, a second output end of the gas-gas heat exchanger is connected with an input end of the nitrogen heating module through a pipeline, the output end of the nitrogen heating module is connected with a second input end of the activated carbon desorption box through a pipeline, the first input end of the activated carbon desorption box is connected with the nitrogen replacement system through a pipeline, and the output end of the activated carbon desorption box is connected with a second input end of the gas-gas heat exchanger through a pipeline.
The emergency activated carbon box is characterized by further comprising an emergency activated carbon box, and the input end of the emergency activated carbon box is connected with the output end of the circulating fan. The emergency activated carbon box has two functions: 1. the nitrogen gas replacement is performed to adsorb a small amount of vocs gas contained in the exhaust gas. 2. And when the temperature and the pressure are over-high and over-high in the desorption process, the gas is discharged through the emergency activated carbon box in an emergency manner.
The solvent condensation recovery system comprises a primary condenser, a secondary condenser and a gas-liquid separation storage tank;
the input of one-level condenser is through the first output of pipeline connecing gas-gas heat exchanger, and the output of one-level condenser is through the input of pipeline connecing the second grade condenser, and the output of second grade condenser is through the input that the pipeline connects the gas-liquid separation storage tank, and the output of gas-liquid separation storage tank connects circulating fan's input through the pipeline.
As shown in fig. 2 and 3, the activated carbon and nitrogen desorption all-in-one machine comprises a box body 1, wherein a nitrogen replacement system, a nitrogen circulation heating system, a solvent condensation recovery system, an activated carbon desorption box 6, an emergency activated carbon box, a safety protection and monitoring system and an electric control module 8 are arranged in the box body 1;
activated carbon desorption case 6 adopts double-deck even design of flowing, and the guarantee is useless activated carbon at desorption in-process thermally equivalent, does not have the heating dead angle, and desorption performance is stable.
The nitrogen gas replacement system comprises a nitrogen gas tank 7 and an activated carbon adsorption tank 10 which are connected through a pipeline, nitrogen gas is output through the nitrogen gas tank 7 before desorption, nitrogen gas purging replacement is carried out on the whole integrated machine through the activated carbon adsorption tank 10, and the oxygen content in the system is guaranteed. And when the oxygen content in the system reaches a set value, the nitrogen tank stops outputting nitrogen for desorption.
The nitrogen circulating heating system consists of a circulating fan 4, a gas-gas heat exchanger 11, a nitrogen heater 12 and a circulating pipeline and provides heat energy for system desorption.
The solvent condensation recovery system consists of a first-stage condenser 2, a second-stage condenser 3 and a gas-liquid separation storage tank 9, and can condense solvent steam into liquid and then recover the solvent steam.
The safety protection and monitoring system comprises a safety protection module and a safety monitoring module, wherein the safety protection module comprises a regenerated carbon box explosion venting device, a circulating pipeline pressure relief device, an explosion venting piece explosion venting device, a nitrogen spraying fire-fighting device and an emergency treatment module. The safety monitoring module carries out regenerated carbon box temperature, pressure and outlet VOCS concentration monitoring, public engineering monitoring, circulating line temperature and pressure monitoring, and the monitoring of the concentration of combustible gas in the system through setting up the sensor in the relevant position, through above dual protection, ensures the safe and stable operation of system.
The electric control module 8 is controlled by a PLC, engineering test data are applied to optimize desorption parameters, and the safe, effective and economic operation of the desorption process is guaranteed.
The emergency activated carbon box is characterized by further comprising an emergency activated carbon box, and the input end of the emergency activated carbon box is connected with the output end of the circulating fan.
According to the active carbon nitrogen desorption system and the integrated machine, nitrogen desorption is safe and reliable, and safety accidents caused by waste gas concentration and desorption temperature are avoided; the water content in the nitrogen desorption condensation recovered solvent is low, the recovery purity of the solvent is high, the value is high, and no secondary pollution is caused; the nitrogen desorption regeneration can not influence the form and the quality of the active carbon, so that the adsorption performance of the active carbon is reduced; nitrogen desorption, sufficient desorption, good effect, repeated use of the activated carbon, and reduced operation cost; in the desorption regeneration process, the nitrogen is recycled, the oxygen content in the system is controllable, the system is safe and stable, and the nitrogen consumption is small.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; 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 such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. An activated carbon nitrogen desorption system is characterized by comprising a nitrogen replacement system, a nitrogen circulating heating system, a solvent condensation recovery system and an activated carbon desorption box, wherein the nitrogen replacement system, the activated carbon desorption box, the nitrogen circulating heating system and the solvent condensation recovery system are sequentially connected through pipelines;
the nitrogen replacement system is used for inputting nitrogen into the activated carbon desorption box;
the nitrogen circulating heating system is used for providing heat energy required by desorption;
the solvent condensation recovery system is used for condensing solvent steam into a liquid state and then recovering the solvent steam.
2. The activated carbon nitrogen desorption system of claim 1 further comprising a safety protection and monitoring system, wherein the safety protection and monitoring system comprises a safety protection module and a safety monitoring module;
the device comprises a safety protection module, a control module and a control module, wherein the safety protection module is used for explosion venting of a regenerative carbon box, pressure relief of a circulating pipeline, nitrogen spraying fire control and emergency treatment;
the safety monitoring module is used for monitoring the temperature and pressure of the regenerated carbon box and the concentration of VOCS at an outlet, monitoring public works, monitoring the temperature and pressure of pipelines in the nitrogen circulating heating system and monitoring the concentration of combustible gas in the system.
3. The activated carbon nitrogen desorption system of claim 1, further comprising an electronic control module, wherein the electronic control module is controlled by a PLC.
4. The activated carbon nitrogen desorption system of claim 1, wherein the nitrogen replacement system comprises a nitrogen tank and an activated carbon adsorption tank which are connected through a pipeline, before desorption, nitrogen is output through the nitrogen tank, nitrogen purging replacement is performed on the whole system through the activated carbon adsorption tank, and after the oxygen content in the system reaches a set value, the nitrogen tank stops outputting nitrogen, and desorption is performed.
5. The activated carbon nitrogen desorption system of claim 1, wherein the nitrogen gas circulation heating system comprises a circulation fan, a gas-gas heat exchanger, and a nitrogen gas heating module;
the output end of the circulating fan is connected with a first input end of the gas-gas heat exchanger through a pipeline, the first output end of the gas-gas heat exchanger is connected with a solvent condensation recovery system through a pipeline, a second output end of the gas-gas heat exchanger is connected with an input end of the nitrogen heating module through a pipeline, the output end of the nitrogen heating module is connected with a second input end of the activated carbon desorption box through a pipeline, the first input end of the activated carbon desorption box is connected with the nitrogen replacement system through a pipeline, and the output end of the activated carbon desorption box is connected with a second input end of the gas-gas heat exchanger through a pipeline.
6. The activated carbon nitrogen desorption system of claim 5, further comprising an emergency activated carbon box, wherein an input end of the emergency activated carbon box is connected with an output end of the circulating fan.
7. The activated carbon nitrogen desorption system of claim 5 wherein the solvent condensate recovery system comprises a primary condenser, a secondary condenser and a gas-liquid separation storage tank;
the input of one-level condenser is through the first output of pipeline connecing gas-gas heat exchanger, and the output of one-level condenser is through the input of pipeline connecing the second grade condenser, and the output of second grade condenser is through the input that the pipeline connects the gas-liquid separation storage tank, and the output of gas-liquid separation storage tank connects circulating fan's input through the pipeline.
8. An activated carbon and nitrogen desorption all-in-one machine comprises a box body, and is characterized in that the system of any one of claims 1 to 7 is arranged in the box body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011637899.XA CN112807931A (en) | 2020-12-31 | 2020-12-31 | Active carbon nitrogen desorption system and all-in-one |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011637899.XA CN112807931A (en) | 2020-12-31 | 2020-12-31 | Active carbon nitrogen desorption system and all-in-one |
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| CN112807931A true CN112807931A (en) | 2021-05-18 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101288820A (en) * | 2008-06-13 | 2008-10-22 | 北京云辰天环保科技有限公司 | Active carbon fiber organic gas recovery method and system using nitrogen as desorption medium |
| CN102614738A (en) * | 2012-04-01 | 2012-08-01 | 河北天龙彩印有限公司 | Organic waste gas desorption process |
| CN207694543U (en) * | 2017-11-28 | 2018-08-07 | 上海宗亚环保科技有限公司 | A kind of activated carbon adsorption hot nitrogen desorption condensate recycling device |
| CN208694613U (en) * | 2018-07-17 | 2019-04-05 | 广州市宝中宝环保设备有限公司 | A kind of nitrogen desorption condensate recycling device |
| CN110394020A (en) * | 2019-05-23 | 2019-11-01 | 深圳市智盾环保科技有限公司 | A kind of nitrogen concentration desorption system for handling the waste active carbon containing VOCs |
-
2020
- 2020-12-31 CN CN202011637899.XA patent/CN112807931A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101288820A (en) * | 2008-06-13 | 2008-10-22 | 北京云辰天环保科技有限公司 | Active carbon fiber organic gas recovery method and system using nitrogen as desorption medium |
| CN102614738A (en) * | 2012-04-01 | 2012-08-01 | 河北天龙彩印有限公司 | Organic waste gas desorption process |
| CN207694543U (en) * | 2017-11-28 | 2018-08-07 | 上海宗亚环保科技有限公司 | A kind of activated carbon adsorption hot nitrogen desorption condensate recycling device |
| CN208694613U (en) * | 2018-07-17 | 2019-04-05 | 广州市宝中宝环保设备有限公司 | A kind of nitrogen desorption condensate recycling device |
| CN110394020A (en) * | 2019-05-23 | 2019-11-01 | 深圳市智盾环保科技有限公司 | A kind of nitrogen concentration desorption system for handling the waste active carbon containing VOCs |
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Application publication date: 20210518 |