CN211346474U - Volatile organic compound recovery device - Google Patents
Volatile organic compound recovery device Download PDFInfo
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- CN211346474U CN211346474U CN201921740529.1U CN201921740529U CN211346474U CN 211346474 U CN211346474 U CN 211346474U CN 201921740529 U CN201921740529 U CN 201921740529U CN 211346474 U CN211346474 U CN 211346474U
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- Prior art keywords
- condenser
- nitrogen
- gas
- liquid separator
- storage tank
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- 239000012855 volatile organic compound Substances 0.000 title claims abstract description 41
- 238000011084 recovery Methods 0.000 title claims abstract description 33
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 126
- 239000012530 fluid Substances 0.000 claims abstract description 68
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 63
- 239000007788 liquid Substances 0.000 claims abstract description 47
- 239000002904 solvent Substances 0.000 claims abstract description 34
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 239000007789 gas Substances 0.000 description 10
- 238000004064 recycling Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000010815 organic waste Substances 0.000 description 6
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Treating Waste Gases (AREA)
Abstract
The application discloses a volatile organic compound recovery device, which comprises a third condenser, a third gas-liquid separator connected with a hot fluid outlet of the third condenser, a solvent storage tank connected with the third gas-liquid separator, a nitrogen compressor, a nitrogen storage tank connected with an outlet of the nitrogen compressor, an economizer connected with the nitrogen storage tank, and a nitrogen turbine connected with the economizer; a cold fluid inlet of the third condenser is connected with the nitrogen turbine, and a cold fluid outlet of the third condenser is connected with a cold fluid inlet of the economizer; the cold fluid outlet of the economizer is connected to the inlet of a nitrogen compressor. The third gas-liquid separator, the third condenser, the nitrogen compressor, the nitrogen storage tank, the economizer and the nitrogen turbine form a nitrogen circulation loop, so that nitrogen can be recycled, and the running cost of the volatile organic compound recovery device is effectively reduced.
Description
Technical Field
The application relates to the field of waste gas recovery, in particular to a volatile organic compound recovery device.
Background
Volatile Organic Compounds (VOCs) are mainly from exhaust gas of petrochemical industry, chlorine system Organic matters for washing and Organic solvent of coating system. The emission of VOCs into the atmosphere can cause a number of health, environmental, safety, and other problems.
The condensation method is the simplest VOCs recovery method, and the principle of the method is that; VOCs are condensed by controlling the operating temperature below the boiling point of the VOCs, so that the purpose of recovering the VOCs is achieved. The cooling media generally used are mainly cold water, chilled brine and liquid ammonia. However, the existing condensation method has the problems of large liquid nitrogen consumption, incapability of recycling and high operation cost.
SUMMERY OF THE UTILITY MODEL
The utility model provides a volatile organic compound recovery unit, aim at solving prior art, the problem that the running cost is high that VOCs was retrieved to the condensation method.
To achieve the purpose, the following technical scheme is adopted in the application:
the volatile organic compound recovery device comprises a third condenser, a third gas-liquid separator connected with a hot fluid outlet of the third condenser, a solvent storage tank connected with the third gas-liquid separator, a nitrogen compressor, a nitrogen storage tank connected with an outlet of the nitrogen compressor, an economizer connected with the nitrogen storage tank, and a nitrogen turbine connected with the economizer; a cold fluid inlet of the third condenser is connected with the nitrogen turbine, and a cold fluid outlet of the third condenser is connected with a cold fluid inlet of the economizer; and the cold fluid outlet of the economizer is connected with the inlet of the nitrogen compressor.
The condenser further comprises a second condenser connected with the third condenser, and a second gas-liquid separator arranged between the second condenser and the third condenser; a cold fluid outlet of the third condenser is connected with a cold fluid inlet of the second condenser; the cold fluid outlet of the second condenser is connected with the cold fluid inlet of the economizer; the second gas-liquid separator is connected with the solvent storage tank; the second gas-liquid separator is connected with a hot fluid outlet of the second condenser, and the second gas-liquid separator is connected with a hot fluid inlet of the third condenser.
The first gas-liquid separator is connected with a hot fluid inlet of the second condenser, and the first condenser is further comprised; a hot fluid outlet of the first condenser is connected with the hot fluid of the first gas-liquid separator; the first gas-liquid separator is connected with the solvent storage tank.
Further, a first regulating valve is arranged between the first gas-liquid separator and the second condenser.
Further, the hot fluid is a volatile organic compound, and the cold fluid is nitrogen.
Further, the third condenser and the second condenser are both dividing wall type heat exchangers.
Further, the device also comprises a solvent pump connected with the solvent storage tank.
Further, the connection point of the solvent storage tank to the solvent pump is located at the bottom of the solvent storage tank.
Further, a second regulating valve is arranged between the nitrogen storage tank and the economizer.
Further, a third regulating valve is arranged between the nitrogen compressor and the economizer.
The beneficial effect of this application: and organic waste gas (hot fluid) containing VOCs enters a hot fluid inlet of a third condenser, heat exchange is carried out between different temperature zones in the third condenser and cold fluid (nitrogen), the hot fluid enters a third gas-liquid separator after heat exchange, the hot fluid is condensed and separated out in the third gas-liquid separator, liquid enters the solvent storage tank for storage, non-condensable gas is discharged to air, and then recovery of volatile organic compounds is completed. The third gas-liquid separator, the third condenser, the nitrogen compressor, the nitrogen storage tank, the economizer and the nitrogen turbine form a nitrogen circulation loop, so that nitrogen can be recycled, and the running cost of the volatile organic compound recovery device is effectively reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of a VOC recovery apparatus in an embodiment of the present application;
in the figure:
1. a first condenser; 2. a first gas-liquid separator; 3. a second condenser; 4. a second gas-liquid separator; 5. a third condenser; 6. a third gas-liquid separator; 7. a solvent storage tank; 8. a solvent pump; 9. a nitrogen compressor; 10. a nitrogen storage tank; 11. an economizer; 12. a nitrogen turbine; 13. a first regulating valve; 14. a second regulating valve; 15. and a third regulating valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, refer to an orientation or positional relationship illustrated in the drawings for convenience in describing the present application and to simplify description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
The following detailed description of implementations of the present application is provided in conjunction with specific embodiments.
As shown in fig. 1, the present embodiment proposes a recovery apparatus for volatile organic compounds, which includes a third condenser 5, a third gas-liquid separator 6 connected to a hot fluid outlet of the third condenser 5, a solvent storage tank 7 connected to the third gas-liquid separator 6, a nitrogen compressor 9, a nitrogen storage tank 10 connected to an outlet of the nitrogen compressor 9, an economizer 11 connected to the nitrogen storage tank 10, and a nitrogen turbine 12 connected to the economizer 11; a cold fluid inlet of the third condenser 5 is connected with the nitrogen turbine 12, and a cold fluid outlet of the third condenser 5 is connected with a cold fluid inlet of the economizer 11; the cold fluid outlet of the economizer 11 is connected to the inlet of the nitrogen compressor 9. It is understood that the voc recovery device further includes the system piping and valves necessary in the prior art.
In the embodiment of the application, the nitrogen compression-cooling-expansion-endothermic reverse Brayton cycle is utilized to provide the refrigeration capacity for the organic waste gas, and the Volatile Organic Compounds (VOCs) are condensed and recovered at different temperature zones. The specific recovery process is as follows: organic waste gas (hot fluid) containing VOCs enters a hot fluid inlet of a third condenser 5, heat exchange is carried out between different temperature zones in the third condenser 5 and cold fluid (nitrogen), the hot fluid enters a third gas-liquid separator 6 after heat exchange, the hot fluid is condensed and separated out in the third gas-liquid separator 6, liquid enters a solvent storage tank 7 for storage, non-condensable gas is discharged to air, and then recovery of volatile organic compounds is completed. The third gas-liquid separator 6, the third condenser 5, the nitrogen compressor 9, the nitrogen storage tank 10, the economizer 11, and the nitrogen turbine 12 form a nitrogen circulation loop, so that nitrogen can be recycled, and the cost of the running of the volatile organic compound recovery device is effectively reduced.
Further, referring to fig. 1, as another embodiment of the recovery apparatus for volatile organic compounds provided in the present application, the recovery apparatus further includes a second condenser 3 connected to a third condenser 5, and a second gas-liquid separator 4 disposed between the second condenser 3 and the third condenser 5; a cold fluid outlet of the third condenser 5 is connected with a cold fluid inlet of the second condenser 3; the cold fluid outlet of the second condenser 3 is connected with the cold fluid inlet of the economizer 11; the second gas-liquid separator 4 is connected with a solvent storage tank 7; the second gas-liquid separator 4 is connected with a hot fluid outlet of the second condenser 3, and the second gas-liquid separator 4 is connected with a hot fluid inlet of the third condenser 5.
In this embodiment, the organic waste gas (thermal fluid) containing VOCs enters the second condenser 3 to perform preliminary heat exchange, the organic waste gas containing VOCs that is not condensed and separated out enters the third condenser 5 to perform further heat exchange, and the specific heat exchange process in the third condenser 5 is the same as that in the above embodiment.
Further, please refer to fig. 1, which is another embodiment of the recycling apparatus for volatile organic compounds provided in the present application, further comprising a first gas-liquid separator 2 connected to a hot fluid inlet of a second condenser 3, and a first condenser 1; a hot fluid outlet of the first condenser 1 is connected with a hot fluid of the first gas-liquid separator 2; the first gas-liquid separator 2 is connected to a solvent reservoir 7.
In this embodiment, the organic waste gas containing VOCs enters the hot fluid inlet of the first condenser 1, and is partially condensed under the cooling of the external cold source, and the temperature is reduced to about 4 ℃. A hot fluid outlet of the first condenser 1 is connected with the first gas-liquid separator 2, condensate enters the solvent storage tank 7 for storage, and uncondensed gas enters the next stage, namely the second condenser 3. The cold source of the first condenser 1 comes from an externally available cold source (such as the latent heat of vaporization of low-temperature liquid in a plant area) or mechanical refrigeration of a water chilling unit and the like.
Further, referring to fig. 1, as another embodiment of the recycling apparatus for volatile organic compounds provided in the present application, a first adjusting valve 13 is disposed between the first gas-liquid separator 2 and the second condenser 3. And then whether to put the first condenser 1 into the recovery device for work can be selected to meet different recovery requirements.
Further, referring to fig. 1, as another embodiment of the recycling apparatus for volatile organic compounds provided in the present application, the hot fluid is a volatile organic compound, and the cold fluid is nitrogen.
Further, referring to fig. 1, as another embodiment of the recycling apparatus for volatile organic compounds provided in the present application, the third condenser 5 and the second condenser 3 are both dividing wall type heat exchangers, and the cold fluid and the hot fluid can exchange heat in different temperature regions.
Further, referring to fig. 1, as another embodiment of the recovery apparatus for volatile organic compounds provided in the present application, a solvent pump 8 connected to a solvent storage tank 7 is further included.
Further, referring to fig. 1, as another embodiment of the recovery apparatus for volatile organic compounds provided in the present application, a connection point of the solvent storage tank 7 to the solvent pump 8 is located at the bottom of the solvent storage tank 7. The bottom of the solvent storage tank 7 is connected with the solvent pump 8 through a pipeline, when the solvent storage tank 7 is to be filled, the solvent pump 8 is started, and the accumulated VOCs condensate is discharged and collected.
Further, referring to fig. 1, as another embodiment of the recycling apparatus for volatile organic compounds provided in the present application, a second regulating valve 14 is disposed between the nitrogen storage tank 10 and the economizer 11 to regulate the working state of the nitrogen circulation loop and maintain the stability of the nitrogen circulation loop.
Further, referring to fig. 1, as another embodiment of the recycling apparatus for volatile organic compounds provided in the present application, a third adjusting valve 15 is disposed between the nitrogen compressor 9 and the economizer 11 to adjust the working state of the nitrogen circulation loop and maintain the stability of the nitrogen circulation loop.
It is to be understood that aspects of the present invention may be practiced otherwise than as specifically described.
It should be understood that the above examples are merely examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.
Claims (10)
1. The volatile organic compound recovery device is characterized by comprising a third condenser, a third gas-liquid separator connected with a hot fluid outlet of the third condenser, a solvent storage tank connected with the third gas-liquid separator, a nitrogen compressor, a nitrogen storage tank connected with an outlet of the nitrogen compressor, an economizer connected with the nitrogen storage tank and a nitrogen turbine connected with the economizer; a cold fluid inlet of the third condenser is connected with the nitrogen turbine, and a cold fluid outlet of the third condenser is connected with a cold fluid inlet of the economizer; and the cold fluid outlet of the economizer is connected with the inlet of the nitrogen compressor.
2. The voc recovery device according to claim 1, further comprising a second condenser connected to the third condenser, and a second gas-liquid separator provided between the second condenser and the third condenser; a cold fluid outlet of the third condenser is connected with a cold fluid inlet of the second condenser; the cold fluid outlet of the second condenser is connected with the cold fluid inlet of the economizer; the second gas-liquid separator is connected with the solvent storage tank; the second gas-liquid separator is connected with a hot fluid outlet of the second condenser, and the second gas-liquid separator is connected with a hot fluid inlet of the third condenser.
3. The voc recovery device according to claim 2, further comprising a first gas-liquid separator connected to the hot fluid inlet of the second condenser, and a first condenser; a hot fluid outlet of the first condenser is connected with the hot fluid of the first gas-liquid separator; the first gas-liquid separator is connected with the solvent storage tank.
4. The voc recovery device according to claim 3, wherein a first regulating valve is provided between the first gas-liquid separator and the second condenser.
5. The voc recovery device of claim 1, wherein the hot fluid is voc and the cold fluid is nitrogen.
6. The voc recovery device of claim 2, wherein the third condenser and the second condenser are both dividing wall heat exchangers.
7. The voc recovery device according to any one of claims 1 to 3, further comprising a solvent pump connected to the solvent storage tank.
8. The voc recovery device of claim 7, wherein the connection point where the solvent reservoir is connected to the solvent pump is located at the bottom of the solvent reservoir.
9. The voc recovery device according to any of claims 1-3, wherein a second regulating valve is provided between the nitrogen storage tank and the economizer.
10. The voc recovery device of claim 9, wherein a third regulating valve is provided between the nitrogen compressor and the economizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921740529.1U CN211346474U (en) | 2019-10-16 | 2019-10-16 | Volatile organic compound recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921740529.1U CN211346474U (en) | 2019-10-16 | 2019-10-16 | Volatile organic compound recovery device |
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| Publication Number | Publication Date |
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| CN211346474U true CN211346474U (en) | 2020-08-25 |
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| CN201921740529.1U Expired - Fee Related CN211346474U (en) | 2019-10-16 | 2019-10-16 | Volatile organic compound recovery device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20230049876A (en) * | 2021-10-07 | 2023-04-14 | 주식회사 티이씨 | Volatile Organic Compound Recovery System and Method |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20230049876A (en) * | 2021-10-07 | 2023-04-14 | 주식회사 티이씨 | Volatile Organic Compound Recovery System and Method |
| KR102552960B1 (en) * | 2021-10-07 | 2023-07-07 | (주)티이씨 | Volatile Organic Compound Recovery System and Method |
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Granted publication date: 20200825 |
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| CF01 | Termination of patent right due to non-payment of annual fee |