CN214261256U - VOCs who compresses condensation, nitrogen oxygen membrane, organic steam membrane combination retrieves and nitrogen gas retrieval and utilization device - Google Patents
VOCs who compresses condensation, nitrogen oxygen membrane, organic steam membrane combination retrieves and nitrogen gas retrieval and utilization device Download PDFInfo
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- CN214261256U CN214261256U CN202023084791.0U CN202023084791U CN214261256U CN 214261256 U CN214261256 U CN 214261256U CN 202023084791 U CN202023084791 U CN 202023084791U CN 214261256 U CN214261256 U CN 214261256U
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Abstract
A VOCs recycling and nitrogen recycling device combining compression condensation, a nitrogen-oxygen membrane and an organic vapor membrane is characterized by mainly comprising a compressor (1), a liquid-gas separator (2), a precooler (3), a condenser (4), a nitrogen-oxygen membrane filter (5), an organic vapor membrane filter (6) and VOCSA liquid collecting tank (7). The utility model discloses a compression condensation, nitrogen oxygen membrane, organic steam membrane combine together to have realized the purpose of VOCs solvent recovery retrieval and utilization and nitrogen gas retrieval and utilization, have saved the consumption of solvent and nitrogen gas, have reduced the emission.
Description
Technical Field
The utility model relates to a chemical production technique, especially an organic solvent and nitrogen gas recovery technique in the chemical production process, specifically speaking are VOCs that compression condensation, nitrogen oxygen membrane, organic steam membrane combination retrieve and nitrogen gas retrieval and utilization device.
Background
In the chemical and pharmaceutical production process, organic solvent is usually used as a process medium, and the solvent is recovered in the production process, but the discharged waste gas still contains higher content of VOCs. In order to meet the emission requirements, a common treatment method is to feed the VOCs waste gas into an RTO furnace for combustion. Although the emission can reach the standard, the environment-friendly waste gas treatment target in the true sense is not realized from the resource perspective.
Considering that the discharged waste gas has higher recovery value, the solvent can enter the production process for recycling through recovery, and some production processes using nitrogen as process gas and nitrogen can also be recycled, the development and design of corresponding VOCs recovery and nitrogen recycling devices are urgently needed, so that the recovery and recycling of the solvent and the nitrogen are realized, the consumption of the solvent and the nitrogen is saved, and the discharge is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at designing a VOCs recovery and nitrogen gas retrieval and utilization device of compression condensation, nitrogen oxygen membrane, organic steam membrane combination to the VOCs solvent in the waste gas of current chemical industry pharmaceutical enterprise emission not carrying out recycle and cause the wasting of resources and polluted environment's problem.
The technical scheme of the utility model is that:
a VOCs recovery and nitrogen recycling device combining compression condensation, a nitrogen-oxygen film and an organic vapor film is characterized by mainly comprising a compressor 1,Liquid-gas separator 2, precooler 3, condenser 4, nitrogen-oxygen membrane filter 5, organic vapor membrane filter 6 and VOCSThe liquid collection tank 7 is formed by that after the volatile organic mixed gas enters the compressor 1 to be compressed, the volatile organic mixed gas is sent into the liquid-gas separator 2 through a pipeline, and the volatile solvent separated out by the liquid-gas separator 2 is directly sent into the VOC through the pipelineSRecycle in the liquid collecting tank 7, the other path of volatile organic mixed gas mainly containing nitrogen is selected to enter the precooler 3 for precooling, the precooled volatile gas enters the condenser 4 for condensation and decomposition, the nitrogen generated after condensation and decomposition is sent into the nitrogen-oxygen membrane filter 5 after being subjected to heat exchange with the compressed gas through the channel of the precooler 3, and the VOC generated after condensation and decomposition is sent into the nitrogen-oxygen membrane filter 5SFeeding VOC through a pipelineSRecycling the liquid collection tank 7; after nitrogen entering the nitrogen-oxygen membrane filter 5 is filtered by a nitrogen-oxygen membrane and then enters the organic vapor membrane filter 6 for separation, gas (permeation residual gas) with low organic vapor concentration is discharged from the organic vapor membrane filter 6 for recycling, and the permeation residual gas is compressed before returning to the compressor (1) for further solvent recovery.
The nitrogen-oxygen membrane filter 5 is connected with an oxygen calandria to discharge when the oxygen exceeds the standard.
The permeating gas of the organic vapor membrane filter 6 is communicated with the air inlet of the compressor 1 through a pipeline so as to be recycled for the second time.
The utility model has the advantages that:
the utility model discloses a compression condensation, nitrogen oxygen membrane, organic steam membrane combine together to have realized the purpose of VOCs solvent recovery retrieval and utilization and nitrogen gas retrieval and utilization, have saved the consumption of solvent and nitrogen gas, have reduced the emission.
The utility model discloses simple structure, it is with low costs, be favorable to reduction in production cost, reduce environmental pollution, improve social economic benefits.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples.
As shown in fig. 1.
A VOCs recycling and nitrogen recycling device combining compression condensation, a nitrogen-oxygen film and an organic vapor film mainly comprises a compressor 1, a liquid-gas separator 2, a precooler 3, a condenser 4, a nitrogen-oxygen film filter 5, an organic vapor film filter 6 and VOCSThe liquid collection tank 7 is formed by that after the volatile organic mixed gas enters the compressor 1 to be compressed, the volatile organic mixed gas is sent into the liquid-gas separator 2 through a pipeline, and the volatile solvent separated out by the liquid-gas separator 2 is directly sent into the VOC through the pipelineSRecycle in the liquid collecting tank 7, another path of volatile organic mixed gas mainly containing nitrogen is selected to enter the precooler 3 for precooling, the precooled volatile gas enters the condenser 4 for condensation and decomposition, the nitrogen after condensation and decomposition is sent into the nitrogen-oxygen membrane filter 5 after being subjected to heat exchange with the compressed gas through the channel of the precooler 3, and the nitrogen-oxygen membrane filter 5 is connected with an oxygen calandria so as to be discharged when the oxygen exceeds the standard. VOC produced after condensation decompositionSFeeding VOC through a pipelineSRecycling the liquid collection tank 7; the nitrogen entering the nitrogen-oxygen membrane filter 5 is filtered by a nitrogen-oxygen membrane, enters the organic vapor membrane filter 6 for filtering, and is discharged from the organic vapor membrane filter 6 for recycling. The permeating gas of the organic vapor membrane filter 6 is communicated with the air inlet of the compressor 1 through a pipeline so as to be recycled for the second time. The condenser 4 is connected with a chilled water inlet pipe 8 and a chilled water outlet pipe 9, as shown in fig. 1.
The utility model discloses a theory of operation is:
(1) after being pressurized by a compressor, the volatile organic mixed gas passes through a liquid-gas separator, a precooler, a condenser, a nitrogen-oxygen film and an organic steam film, so that nitrogen recycling is realized.
(2) VOCs solvent is collected and enters a VOCs liquid collection tank through a liquid-gas separator after the VOCs solvent is compressed and condensed;
(3) VOCs condensed out from the condenser enter a VOCs liquid collecting tank for collection, so that the VOCs are recovered;
(4) and the permeation gas of the organic vapor film flows back to the inlet of the compressor to further recover the VOCs, so that the recovery rate of the VOCs solvent is maximized.
(5) When the oxygen content exceeds the standard, the system automatically judges whether to start the nitrogen-oxygen film through oxygen content measurement, if the oxygen exceeds the standard, the nitrogen-oxygen film is started and the oxygen is discharged, if the oxygen reaches the standard, the nitrogen-oxygen film is not put into operation, and the oxygen content is controlled below 1.5 percent. If the oxygen content is well controlled in the production process, oxygen does not need to be removed, and the full recovery of VOCs and nitrogen can be realized.
The utility model discloses the part that does not relate to all is the same with prior art or can adopt prior art to realize.
Claims (3)
1. A VOCs recycling and nitrogen recycling device combining compression condensation, a nitrogen-oxygen membrane and an organic vapor membrane is characterized by mainly comprising a compressor (1), a liquid-gas separator (2), a precooler (3), a condenser (4), a nitrogen-oxygen membrane filter (5), an organic vapor membrane filter (6) and VOCSThe liquid collecting tank (7) is formed by feeding volatile organic mixed gas into a compressor (1) for compression and then feeding the compressed gas into a liquid-gas separator (2) through a pipeline, and directly feeding the volatile solvent separated by the liquid-gas separator (2) into the VOC (volatile organic compound) through the pipelineSRecycling in the liquid collecting tank (7), selecting and entering the other path of volatile organic mixed gas mainly containing nitrogen into the precooler (3) for precooling, entering the precooled volatile gas into the condenser (4) for condensation and decomposition, sending the nitrogen generated after condensation and decomposition into the nitrogen-oxygen membrane filter (5) after heat exchange and temperature return with the compressed gas through the channel of the precooler (3), and sending the VOC generated after condensation and decomposition into the nitrogen-oxygen membrane filter (5)SFeeding VOC through a pipelineSRecycling the liquid collection tank (7); and after nitrogen entering the nitrogen-oxygen membrane filter (5) is filtered by a nitrogen-oxygen membrane and then enters the organic vapor membrane filter (6) for separation, gas with low organic vapor concentration is discharged from the organic vapor membrane filter (6) for recycling, and the permeated gas is compressed before returning to the compressor (1) for further recycling the solvent.
2. The apparatus for compressed condensation, membrane-on-nitrogen, and organic vapor membrane combined VOCs recovery and nitrogen reuse according to claim 1, wherein said membrane-on-nitrogen filter (5) is connected with an oxygen drain pipe for discharging when oxygen exceeds standard.
3. The apparatus for VOCs recovery and nitrogen recycle according to claim 1, wherein the permeate gas of the organic vapor membrane filter (6) is connected to the inlet of the compressor (1) through a pipe for further secondary recovery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023084791.0U CN214261256U (en) | 2020-12-21 | 2020-12-21 | VOCs who compresses condensation, nitrogen oxygen membrane, organic steam membrane combination retrieves and nitrogen gas retrieval and utilization device |
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| CN202023084791.0U CN214261256U (en) | 2020-12-21 | 2020-12-21 | VOCs who compresses condensation, nitrogen oxygen membrane, organic steam membrane combination retrieves and nitrogen gas retrieval and utilization device |
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| CN214261256U true CN214261256U (en) | 2021-09-24 |
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