CN220371051U - Desorption device of VOCs adsorbent - Google Patents
Desorption device of VOCs adsorbent Download PDFInfo
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- CN220371051U CN220371051U CN202321410046.1U CN202321410046U CN220371051U CN 220371051 U CN220371051 U CN 220371051U CN 202321410046 U CN202321410046 U CN 202321410046U CN 220371051 U CN220371051 U CN 220371051U
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- adsorbent
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- 238000003795 desorption Methods 0.000 title claims abstract description 81
- 239000012855 volatile organic compound Substances 0.000 title claims abstract description 63
- 239000003463 adsorbent Substances 0.000 title claims abstract description 43
- 238000010438 heat treatment Methods 0.000 claims abstract description 26
- 238000009833 condensation Methods 0.000 claims description 24
- 230000005494 condensation Effects 0.000 claims description 24
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 20
- 238000001179 sorption measurement Methods 0.000 claims description 19
- 238000001816 cooling Methods 0.000 claims description 15
- 238000004891 communication Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 44
- 239000007789 gas Substances 0.000 description 28
- 229910052757 nitrogen Inorganic materials 0.000 description 22
- 238000005265 energy consumption Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000010865 sewage Substances 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
- 239000002912 waste gas Substances 0.000 description 1
Classifications
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- 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
Landscapes
- Separation Of Gases By Adsorption (AREA)
- Treating Waste Gases (AREA)
Abstract
The utility model discloses a desorption device of VOCs adsorbent, comprising: the desorption box is used for containing VOCs adsorbent; the air inlet end of the first circulating fan is communicated with the air outlet end of the desorption box through a first pipeline, and the air outlet end of the first circulating fan is communicated with the air inlet end of the desorption box through a second pipeline; the heating mechanism is arranged on the second pipeline and is used for heating the gas in the pipeline; the air inlet end of the condensing mechanism is communicated with the first pipeline through a third pipeline and is used for condensing VOCs in the gas entering the condensing mechanism; the air inlet end of the second circulating fan is communicated with the air outlet end of the condensing mechanism through a fourth pipeline, and the air outlet end of the second circulating fan is communicated with the first pipeline through a fifth pipeline; or the air outlet end of the second circulating fan is communicated with the second pipeline through a fifth pipeline. The desorption device of the VOCs adsorbent can reduce the operation cost of the desorption process.
Description
Technical Field
The present utility model relates to a desorption device, and more particularly to a desorption device for VOCs adsorbent.
Background
At present, most enterprises of VOCs-containing waste gas treatment processes adopt simple treatment processes such as adsorbent adsorption and the like, activated carbon is taken as an adsorbent, because the adsorption capacity of the activated carbon is limited, the activated carbon needs to be replaced after the activated carbon is saturated, and the replaced activated carbon belongs to dangerous waste, so that more operation cost is necessarily brought to the enterprises, and the activated carbon is regenerated in a desorption mode such as hot nitrogen, steam, hot air and the like at present. The thermal nitrogen desorption mode has the problems of high energy consumption, long desorption time, large nitrogen consumption and the like, and the operation cost of enterprises can be increased.
The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.
Disclosure of Invention
The utility model aims to provide a desorption device of VOCs adsorbent, which can reduce the operation cost of the desorption process.
In order to achieve the above object, the present utility model provides a desorption apparatus for VOCs adsorbent, comprising:
the desorption box is used for containing VOCs adsorbent;
the air inlet end of the first circulating fan is communicated with the air outlet end of the desorption box through a first pipeline, and the air outlet end of the first circulating fan is communicated with the air inlet end of the desorption box through a second pipeline;
the heating mechanism is arranged on the second pipeline and is used for heating the gas in the pipeline;
the air inlet end of the condensing mechanism is communicated with the first pipeline through a third pipeline and is used for condensing VOCs in the gas entering the condensing mechanism;
the air inlet end of the second circulating fan is communicated with the air outlet end of the condensing mechanism through a fourth pipeline, and the air outlet end of the second circulating fan is communicated with the first pipeline through a fifth pipeline; or the air outlet end of the second circulating fan is communicated with the second pipeline through a fifth pipeline.
In one or more embodiments, the desorption device further comprises an economizer heat exchanger mounted on the third conduit and the fifth conduit.
In one or more embodiments, the condensing mechanism is a multi-stage condenser.
In one or more embodiments, the desorption device further includes a condensate storage tank connected to the condensation mechanism, for storing VOCs condensate condensed by the condensation mechanism.
In one or more embodiments, the fifth conduit is provided with a first valve.
In one or more embodiments, the desorption device of the VOCs adsorbent further comprises an adsorption mechanism for adsorbing VOCs, an air inlet end of the adsorption mechanism is communicated with an air outlet end of the second circulating fan through a sixth pipeline, and a second valve is arranged on the sixth pipeline.
In one or more embodiments, the outlet end of the adsorption mechanism is in communication with the fifth conduit through a seventh conduit, and the fifth conduit and seventh conduit junction is downstream of the first valve.
In one or more embodiments, the adsorption mechanism is an activated carbon adsorption mechanism.
In one or more embodiments, a cooling mechanism is also mounted on the second conduit for cooling the gas within the conduit.
In one or more embodiments, the condensation temperature within the condensation mechanism is between 0 and 5 ℃.
Compared with the prior art, the desorption device of the VOCs adsorbent forms a total circulation system through the desorption box, the first circulation fan, the heating mechanism, the condensing mechanism, the second circulation fan and the pipelines, so that nitrogen can always circulate in the total circulation system, namely, after adding nitrogen into the total circulation system once before desorption, new nitrogen is not needed to be added in the whole desorption process, the usage amount of nitrogen is reduced, and the desorption cost is saved.
Drawings
FIG. 1 is a schematic diagram of the connection of a desorption device for VOCs adsorbent according to an embodiment of the present utility model;
fig. 2 is a schematic view showing a partial connection of a desorption apparatus of a VOCs adsorbent according to an embodiment of the present utility model.
The main reference numerals illustrate:
1. a first circulation system; 11. a desorption box; 12. a first circulating fan; 13. a heating mechanism; 14. a cooling mechanism; 151. a first pipe; 152. a second pipe; 2. a second circulation system; 21. a condensing mechanism; 22. a second circulating fan; 23. an energy-saving heat exchanger; 24. an adsorption mechanism; 25. a condensate storage tank; 261. a third conduit; 262. a fourth conduit; 263. a fifth pipe; 264. a sixth conduit; 265. a seventh pipe; 266. an eighth conduit; 267. a first valve; 268. and a second valve.
Detailed Description
The following detailed description of embodiments of the utility model is, therefore, to be taken in conjunction with the accompanying drawings, and it is to be understood that the scope of the utility model is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or components.
As shown in fig. 1, a desorption apparatus for VOCs adsorbent according to an embodiment of the present utility model includes a desorption case 11, a first circulation fan 12, a heating mechanism 13, a condensing mechanism 21, and a second circulation fan 22; wherein, the desorption box 11 is used for containing VOCs adsorbent; the air inlet end of the first circulating fan 12 is communicated with the air outlet end of the desorption box 11 through a first pipeline 151, and the air outlet end of the first circulating fan 12 is communicated with the air inlet end of the desorption box 11 through a second pipeline 152; the heating mechanism 13 is mounted on the second pipeline 152 and is used for heating the gas in the pipeline; the air inlet end of the condensing mechanism 21 is communicated with the first pipeline 151 through a third pipeline 261 and is used for condensing VOCs in the gas entering the condensing mechanism 21; the air inlet end of the second circulating fan 22 is communicated with the air outlet end of the condensing mechanism 21 through a fourth pipeline 262, and the air outlet end of the second circulating fan 22 is communicated with the first pipeline 151 through a fifth pipeline 263; or the outlet end of the second circulation fan 22 communicates with the second pipe 152 through the fifth pipe 263.
It can be understood that the whole desorption device can adopt a hot nitrogen mode to desorb VOCs adsorbent, and the desorption box 11, the first circulating fan 12, the heating mechanism 13, the condensing mechanism 21 and the second circulating fan 22 form a total circulating system, so that nitrogen can always circulate in the total circulating system, namely, after adding nitrogen once in the total circulating system before desorption, new nitrogen is not needed to be added in the whole desorption process, thereby reducing the use amount of nitrogen and saving desorption cost. Before the desorption device is operated, nitrogen is filled into the total circulation system, so that the oxygen content in the total circulation system is reduced to below 3%V/V, and the total circulation system is ensured to operate in a nitrogen-rich environment which can be understood as meaning that the nitrogen content is very high.
In a specific embodiment, after nitrogen is filled into the total circulation system, the initial pressure of the total circulation system is 3000Pa, and the leakage amount of the total circulation system is ensured to be less than 1 per mill for 1 min.
In a specific embodiment, the heating mechanism 13 controls the heating operation temperature of the total circulation system to be 180-200 ℃, the desorption device further comprises a pressure release valve, and the pressure release valve can be opened when the temperature in the total circulation system is higher than 220 ℃, and the pressure release valve automatically releases pressure, so that the operation safety of the total circulation system is ensured.
It should be further noted that the total circulation system may include a first circulation system 1 and a second circulation system 2, where the first circulation system 1 may be formed by matching a desorption tank 11, a first circulation fan 12, a heating mechanism 13, and a first pipe 151 and a second pipe 152, where the heating mechanism 13 may heat gas in the first circulation system 1, and the first circulation fan 12 drives the gas in the first circulation system 1 to circulate, and may be that the heated gas enters the desorption tank 11 to heat the VOCs adsorbent in the desorption tank 11, so that VOCs in the VOCs adsorbent are desorbed from the VOCs adsorbent at a high temperature.
The second circulation system 2 may be considered as a condensation mechanism 21, a second circulation fan 22 and corresponding pipelines, the second circulation system 2 is communicated with the first circulation system 1, and in the internal circulation process of the gas in the first circulation system 1, part of the gas enters the second circulation system 2 and returns to the first circulation system 1; the condensing mechanism 21 in the second circulation system 2 is used for cooling the gas in the second circulation system 2, so that VOCs in the gas are liquefied when encountering cold, and the content of VOCs in the gas returned to the first circulation system 1 is reduced as much as possible.
The desorption device can quickly reach the set temperature and reduce the energy consumption of public engineering through the cooperation of the first circulation system 1, the second circulation system 2 and each mechanism in the total circulation system.
The VOCs adsorbent may be activated carbon, molecular sieve, or other adsorbent that adsorbs VOCs.
In one embodiment, the desorption device further comprises an economizer heat exchanger 23, and the economizer heat exchanger 23 is installed on the third pipeline 261 and the fifth pipeline 263. Since the heating mechanism 13 is located in the first circulation system 1 and the condensing mechanism 21 is located in the second circulation system 2 in the desorption process of the desorption device of the present utility model, the average temperature of the gas in the first circulation system 1 may be considered to be higher than the average temperature of the gas in the second circulation system 2, that is, the temperature of the gas in the third pipeline 261 may be considered to be higher than the temperature of the gas in the fifth pipeline 263, the economizer heat exchanger 23 may perform heat exchange, that is, the third pipeline 261 may heat the fifth pipeline 263 in the economizer heat exchanger 23, that is, the temperature of the gas in the fifth pipeline 263 may be raised, that is, the difference between the gas flowing into the first circulation system 1 from the fifth pipeline 263 and the gas circulating in the first circulation system 1 is reduced, thereby reducing the energy consumption of the heating mechanism 13, and in addition, the temperature of the gas entering the condensing device may be reduced, thereby reducing the energy consumption of the condensing device.
In one embodiment, the condensing mechanism 21 is a multi-stage condenser, so that a better condensing effect can be achieved.
The nitrogen used in the thermal nitrogen desorption device in the prior art is not recycled but disposable, so in order to ensure that the content of VOCs in the gas flowing out of the thermal nitrogen desorption device is as low as possible, the condensation temperature in the device for condensing and recovering the VOCs is conventionally below-20 ℃, namely the energy consumption and the corresponding condensation pressure of the device for condensing and recovering the VOCs are relatively large.
In order to solve the above problems, in a specific embodiment, since the gas in the desorption apparatus of the present utility model is always circulated, the condensation temperature in the condensation mechanism 21 is kept at 0-5 ℃, the nitrogen in the circulated gas is circulated through the condensation mechanism 21 in the continuous circulation process, and the condensation temperature in the condensation mechanism 21 is kept within the above temperature range, so that the condensation of VOCs can be realized, and the effect of reducing the energy consumption of the condensation mechanism 21 is achieved.
In one embodiment, the desorption device further includes a condensate storage tank 25 connected to the condensation mechanism 21, for storing VOCs condensate condensed by the condensation mechanism 21. The condensing mechanism 21 and the condensate storage tank 25 can be communicated through the eighth pipeline 266, and VOCs condensate obtained by condensation of the condensing mechanism 21 enters the condensate storage tank 25 through the eighth pipeline 266, so that the effect of recovering the VOCs condensate is achieved.
In one embodiment, the fifth pipe 263 is provided with a first valve 267. When the desorption device of the present utility model is just started to operate, the second circulation fan 22 and the first valve 267 are both closed, that is, only the first circulation system 1 works, so as to quickly heat the VOCs adsorbent in the desorption tank 11, and make it reach a temperature at which desorption is possible. When the temperature in the desorption case 11 reaches the pre-examination temperature, the condensing mechanism 21, the second circulating fan 22 and the first valve 267 are opened, so that the process of condensing and recovering VOCs is performed.
In a specific embodiment, the second circulation system 2 further includes an adsorption mechanism 24 for adsorbing VOCs, where an air inlet end of the adsorption mechanism 24 is connected to an air outlet end of the second circulation fan 22 through a sixth pipeline 264, and the sixth pipeline 264 is provided with a second valve 268. The adsorption mechanism 24 serves to further adsorb VOCs in the overall circulation system.
The adsorption performance of the adsorbent after the desorption and regeneration of the VOCs adsorbent is completed by the desorption device can be recovered to more than 95 percent.
Specifically, the air outlet end of the adsorption mechanism 24 is communicated with the fifth pipeline 263 through the seventh pipeline 265, and the connection between the fifth pipeline 263 and the seventh pipeline 265 is located downstream of the first valve 267. The second valve 268 and the first valve 267 are not simultaneously open.
Specifically, the adsorption mechanism 24 is an activated carbon adsorption mechanism.
In one embodiment, the second conduit 152 also has a cooling mechanism 14 mounted thereon for cooling the gas within the conduit. Specifically, as shown in fig. 1, the cooling mechanism 14 and the heating mechanism 13 may be disposed in parallel on the second pipe 152, and the pipes corresponding to the cooling mechanism 14 and the heating mechanism 13 are provided with switching valves, that is, only one of the pipes corresponding to the cooling mechanism 14 and the heating mechanism 13 is open at most at the same time.
In other embodiments, as shown in fig. 2, the cooling mechanism 14 and the heating mechanism 13 may be disposed in series on the second pipe 152, and at most only one of the cooling mechanism 14 and the heating mechanism 13 is on at the same time.
After the desorption of the whole desorption device is completed, the heating mechanism 13 is closed, the cooling mechanism 14 is opened, the temperature of the gas in the whole first circulation system 1 is reduced, the cooled gas enters the desorption box 11, and the temperature of the VOCs adsorbent in the desorption box 11 is reduced.
The cooling mechanism 14, the heating mechanism 13 and the economizer heat exchanger 23 in the desorption device of the present utility model are all installed outside the corresponding pipelines, i.e., are not in contact with the gas in the pipelines.
The working flow of the desorption device of the VOCs adsorbent in one embodiment of the utility model is as follows: before the desorption device is started, nitrogen is firstly filled into the desorption box 11, and the oxygen content in the desorption device is replaced to 3%V/V and maintained; starting a first circulating fan 12 and a heating mechanism 13 to heat the desorption box 11; when the desorption box 11 is heated to 70 ℃, the second circulating fan 22 and the condensing mechanism 21 are started, the first valve 267 is opened, and at the moment, the generation of VOCs condensate can be observed and collected; after a period of operation, no generation of VOCs condensate is substantially observed, the first valve 267 is closed, the second valve 268 is opened and the adsorption mechanism 24 is started, so that a small amount of VOCs remaining in the desorption device are further removed; after a period of operation, the desorption device is stopped and the desorption is completed.
In summary, the desorption device of the VOCs adsorbent has the following beneficial effects:
(1) Because of the protection of nitrogen, the system can be heated to 200 ℃, and the desorption is more thorough and safer;
(2) Because the condensation flow is very small, the second circulation system only has 10% of the air flow of the second circulation system, the final condensation temperature is 0-5 ℃, the condensation temperature below the conventional condensation temperature of minus 20 ℃ is not needed, and the energy-saving heat exchanger is used for recovering the cold energy, so that the condensation cost is lower;
(3) A small amount of incompletely condensed VOCs are adsorbed by an adsorption mechanism, so that the desorption device can stably discharge after reaching the standard;
(4) Reduces the operation energy consumption, does not produce sewage during the operation, and reduces the discharge of three wastes.
The foregoing descriptions of specific exemplary embodiments of the present utility model are presented for purposes of illustration and description. It is not intended to limit the utility model to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the utility model and its practical application to thereby enable one skilled in the art to make and utilize the utility model in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the utility model be defined by the claims and their equivalents.
Claims (10)
1. A desorption apparatus for VOCs adsorbents, comprising:
the desorption box is used for containing VOCs adsorbent;
the air inlet end of the first circulating fan is communicated with the air outlet end of the desorption box through a first pipeline, and the air outlet end of the first circulating fan is communicated with the air inlet end of the desorption box through a second pipeline;
the heating mechanism is arranged on the second pipeline and is used for heating the gas in the pipeline;
the air inlet end of the condensing mechanism is communicated with the first pipeline through a third pipeline and is used for condensing VOCs in the gas entering the condensing mechanism;
the air inlet end of the second circulating fan is communicated with the air outlet end of the condensing mechanism through a fourth pipeline, and the air outlet end of the second circulating fan is communicated with the first pipeline through a fifth pipeline; or the air outlet end of the second circulating fan is communicated with the second pipeline through a fifth pipeline.
2. The desorbing apparatus for VOCs adsorbent according to claim 1, further comprising an economizer heat exchanger mounted on said third conduit and said fifth conduit.
3. The desorbing device for VOCs adsorbent as set forth in claim 1 wherein said condensing means is a multi-stage condenser.
4. The desorbing device for VOCs adsorbent according to claim 1, further comprising a condensate storage tank connected to said condensing means for storing the VOCs condensate condensed by said condensing means.
5. The desorbing device for VOCs adsorbent according to claim 1, wherein said fifth conduit is provided with a first valve.
6. The desorbing device of VOCs adsorbent according to claim 5, further comprising an adsorption mechanism for adsorbing VOCs, wherein an air inlet end of the adsorption mechanism is communicated with an air outlet end of the second circulating fan through a sixth pipeline, and a second valve is provided on the sixth pipeline.
7. The desorbing device of VOCs adsorbent in accordance with claim 6 wherein said outlet end of said adsorbent means is in communication with said fifth conduit through a seventh conduit, and wherein said fifth conduit and seventh conduit junction is downstream of said first valve.
8. The desorbing device for VOCs adsorbent as defined in claim 6 wherein said adsorbent means is an activated carbon adsorbent means.
9. The desorbing device for VOCs adsorbent as set forth in claim 1 wherein said second conduit is further provided with a cooling means for cooling the gas in the conduit.
10. The desorption apparatus of VOCs adsorbent according to claim 1, wherein the condensation temperature in said condensation mechanism is 0-5 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321410046.1U CN220371051U (en) | 2023-06-05 | 2023-06-05 | Desorption device of VOCs adsorbent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321410046.1U CN220371051U (en) | 2023-06-05 | 2023-06-05 | Desorption device of VOCs adsorbent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220371051U true CN220371051U (en) | 2024-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321410046.1U Active CN220371051U (en) | 2023-06-05 | 2023-06-05 | Desorption device of VOCs adsorbent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220371051U (en) |
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2023
- 2023-06-05 CN CN202321410046.1U patent/CN220371051U/en active Active
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