CN115518407B - Ultralow-temperature solvent condensation recovery system and method - Google Patents
Ultralow-temperature solvent condensation recovery system and method Download PDFInfo
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- CN115518407B CN115518407B CN202211129952.4A CN202211129952A CN115518407B CN 115518407 B CN115518407 B CN 115518407B CN 202211129952 A CN202211129952 A CN 202211129952A CN 115518407 B CN115518407 B CN 115518407B
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- hot fluorine
- evaporator
- fluorine
- solvent
- electromagnetic valve
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- 239000002904 solvent Substances 0.000 title claims abstract description 72
- 238000011084 recovery Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000009833 condensation Methods 0.000 title claims abstract description 20
- 230000005494 condensation Effects 0.000 title claims abstract description 20
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims abstract description 107
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 107
- 239000011737 fluorine Substances 0.000 claims abstract description 107
- 239000007788 liquid Substances 0.000 claims abstract description 47
- 238000003860 storage Methods 0.000 claims abstract description 33
- 238000004781 supercooling Methods 0.000 claims abstract description 29
- 239000003507 refrigerant Substances 0.000 claims abstract description 19
- 238000005057 refrigeration Methods 0.000 claims abstract description 19
- 238000001704 evaporation Methods 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 230000008020 evaporation Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000003960 organic solvent Substances 0.000 description 4
- 238000011282 treatment Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- B01D5/0003—Condensation of vapours; Recovering volatile solvents by condensation by using heat-exchange surfaces for indirect contact between gases or vapours and the cooling medium
-
- 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
- B01D5/0078—Condensation of vapours; Recovering volatile solvents by condensation characterised by auxiliary systems or arrangements
- B01D5/009—Collecting, removing and/or treatment of the condensate
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses an ultralow temperature solvent condensation recovery system, which comprises: the ultralow temperature refrigeration system comprises a compressor, a condenser, a liquid storage device, a supercooling heat exchanger and a gas-liquid separator which are sequentially connected through pipelines, wherein the gas-liquid separator is connected with the compressor, the supercooling heat exchanger is connected with an evaporator through a pipeline, and the evaporator is connected with the gas-liquid separator; the hot fluorine solvent recovery system comprises a first hot fluorine electromagnetic valve, a hot fluorine bypass valve, a mixer, a hot fluorine expansion valve, a second hot fluorine electromagnetic valve, a first hot fluorine one-way valve, a second hot fluorine one-way valve, a third hot fluorine electromagnetic valve and a solvent storage tank. The recovery method of the system is also disclosed, the ultralow temperature refrigeration system is operated, the temperature of the refrigerant in the evaporator can reach minus 50 ℃ to minus 60 ℃, all solvent gas frosts on the surface of the heat exchange tube of the evaporator, the hot fluorine solvent recovery system is operated, the high temperature refrigerant passes through the evaporator, the frost layer on the surface of the heat exchange tube absorbs heat to melt, and the recovery is completed through the solvent storage tank.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to an ultralow temperature solvent condensation recovery system and method.
Background
In the industries of medicine, petrochemical industry and the like, a plurality of volatile organic solvents can be volatilized continuously in the production process, if the volatile organic solvents are not treated, the emission of the volatile organic solvents can not only cause great cost waste, but also cause serious harm to the environment and human bodies. The recovery methods commonly used at present are an absorption method, an adsorption method, a membrane separation method and a low-temperature water condensation method. The absorption method is to absorb volatile solvents by using similar compatible organic matters, and the method is simple to operate, but can achieve the purpose of recovery by later fractionation, and has a complicated process; the adsorption method is to absorb volatile solvent by using solid capable of absorbing volatile solvent, and is commonly used for absorbing toxic solvent, and recovery is difficult; the membrane separation method has complex process and high price, is limited by conditions such as high temperature, corrosion, pressure resistance and the like, and has low utilization rate; the low-temperature water condensation method generally uses low-temperature chilled water to condense volatile solvents, and has a limited temperature reached by low-temperature water and a limited recovery rate, and particularly, the low-temperature water condensation method is difficult to recover when the concentration of the volatile solvents is low.
Thus, there is a need to develop a solvent recovery system and method.
Disclosure of Invention
In order to solve the technical problems, the invention discloses an ultralow temperature solvent condensation recovery system and method, which can completely recover volatile organic solvents and avoid the harm of solvent volatilization to the environment and human body.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
according to a first aspect of an embodiment of the present invention, an ultralow temperature solvent condensation recovery system is provided.
In one embodiment, the ultra-low temperature solvent condensation recovery system comprises: the ultralow temperature refrigeration system comprises a compressor, a condenser, a liquid storage device, a supercooling heat exchanger and a gas-liquid separator which are sequentially connected through pipelines, wherein the gas-liquid separator is connected with the compressor, the supercooling heat exchanger is connected with the evaporator through a pipeline, the evaporator is connected with the gas-liquid separator, a supercooling expansion valve is arranged on a pipeline between the liquid storage device and the supercooling heat exchanger, an evaporation pressure regulating valve is arranged on a pipeline between the supercooling heat exchanger and the gas-liquid separator, a refrigeration electromagnetic valve is arranged on a pipeline between the evaporator and the gas-liquid separator, and a refrigeration expansion valve is arranged on a pipeline between the supercooling heat exchanger and the evaporator; the hot fluorine solvent recovery system comprises a first hot fluorine electromagnetic valve, a hot fluorine bypass valve, a mixer, a hot fluorine expansion valve, a second hot fluorine electromagnetic valve, a first hot fluorine one-way valve, a second hot fluorine one-way valve, a third hot fluorine electromagnetic valve and a solvent storage tank, wherein the solvent storage tank is connected with an evaporator, the mixer is arranged on a parallel pipeline of a pipeline between the evaporator and a gas-liquid separator, the first hot fluorine electromagnetic valve and the hot fluorine bypass valve are sequentially arranged on the pipeline between the compressor and the mixer, the hot fluorine expansion valve and the second hot fluorine electromagnetic valve are arranged on the pipeline between the mixer and the evaporator, and the third hot fluorine electromagnetic valve, the first hot fluorine one-way valve, the second hot fluorine one-way valve are arranged on the pipeline between a supercooling heat exchanger and the evaporator.
Optionally, the evaporator is provided with a gas inlet, a gas outlet and a liquid outlet, wherein the liquid outlet is connected with the solvent storage tank.
Optionally, the compressor, the condenser, the liquid storage device, the supercooling heat exchanger, the gas-liquid separator and the evaporator are subjected to explosion-proof treatment.
Optionally, the solvent storage tank is provided with a solvent storage tank outlet.
According to a second aspect of the embodiment of the present invention, a method for using the above-mentioned ultralow temperature solvent condensation recovery system is provided.
In one embodiment, the ultra-low temperature solvent condensation recovery process comprises the steps of:
When the ultralow temperature refrigerating system is operated, the refrigerating electromagnetic valve and the third thermal fluorine electromagnetic valve are opened, the first thermal fluorine electromagnetic valve and the second thermal fluorine electromagnetic valve are closed, the temperature of the refrigerant in the evaporator heat exchange tube is between minus 50 ℃ and minus 60 ℃, and the solvent is sublimated and frosted on the surface of the heat exchange tube after entering the evaporator through the gas inlet of the evaporator, so as to form a solvent frost layer;
When the hot fluorine solvent recovery system is operated, the first hot fluorine electromagnetic valve and the second hot fluorine electromagnetic valve are opened, the refrigeration electromagnetic valve and the third hot fluorine electromagnetic valve are closed, the hot fluorine gas of the compressor is divided into two paths after passing through the first hot fluorine electromagnetic valve, and one path sequentially passes through the second hot fluorine one-way valve, the evaporator, the second hot fluorine electromagnetic valve and the hot fluorine expansion valve and enters the mixer, wherein the hot fluorine gas exchanges heat with the solvent frost layer after entering the evaporator, and after the solvent frost layer absorbs heat and liquefies, the hot fluorine gas enters the solvent storage tank through the liquid outlet of the evaporator and finally is discharged through the outlet of the solvent storage tank, so that the recovery work is completed; the other path of refrigerant enters the mixer through the thermal fluorine bypass valve, and the two paths of refrigerant are mixed to obtain gaseous refrigerant, and the gaseous refrigerant enters the gas-liquid separator to complete circulation.
Compared with the traditional low-temperature water condensation method, the method has the advantages that the temperature of the refrigerant in the evaporator reaches minus 50 ℃ to minus 60 ℃ through the cooperation of the supercooling expansion valve, the supercooling heat exchanger and the evaporating pressure regulating valve, all solvent gas frosts on the surface of the heat exchange tube of the evaporator, the problem of limited cold water temperature is solved, and low-concentration recovery is possible; the hot fluorine solvent recovery system operates, the high-temperature refrigerant absorbs heat and melts through the evaporator and the frost layer on the surface of the heat exchange tube, and the heat exchange tube flows through the solvent storage tank to complete recovery, condensation and recovery integrally, so that other additional process treatments are not needed, and the operation is simple.
Drawings
FIG. 1 is a schematic diagram of an ultralow temperature solvent condensation recovery system of the present invention;
The device comprises a compressor 1, a condenser 2, a condenser 3, a liquid storage tank 4, a supercooling heat exchanger 5, a solvent storage tank 6, an evaporator 7, a gas-liquid separator 8, a first thermal fluorine electromagnetic valve 9, a thermal fluorine bypass valve 10, a mixer 11, a thermal fluorine expansion valve 12, a second thermal fluorine electromagnetic valve 13, a refrigeration electromagnetic valve 14, a third thermal fluorine electromagnetic valve 15, a first thermal fluorine one-way valve 16, a refrigeration expansion valve 17, a second thermal fluorine one-way valve 18, a supercooling expansion valve 19, an evaporation pressure regulating valve 20, a gas inlet 21, a gas outlet 22, a liquid outlet 23 and a solvent storage tank outlet.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
An ultra-low temperature solvent condensation recovery system, as shown in figure 1, comprising: the ultralow temperature refrigeration system comprises a compressor 1, a condenser 2, a liquid reservoir 3, a supercooling heat exchanger 4 and a gas-liquid separator 7 which are sequentially connected through pipelines, wherein the gas-liquid separator 7 is connected with the compressor 1, the supercooling heat exchanger 4 is connected with the evaporator 6 through a pipeline, the evaporator 6 is connected with the gas-liquid separator 7, a supercooling expansion valve 18 is arranged on a pipeline between the liquid reservoir 3 and the supercooling heat exchanger 4, an evaporation pressure regulating valve 19 is arranged on a pipeline between the supercooling heat exchanger 4 and the gas-liquid separator 7, a refrigeration electromagnetic valve 13 is arranged on a pipeline between the evaporator 6 and the gas-liquid separator 7, and a refrigeration expansion valve 16 is arranged on a pipeline between the supercooling heat exchanger 4 and the evaporator 6; the hot fluorine solvent recovery system comprises a first hot fluorine electromagnetic valve 8, a hot fluorine bypass valve 9, a mixer 10, a hot fluorine expansion valve 11, a second hot fluorine electromagnetic valve 12, a first hot fluorine one-way valve 15, a second hot fluorine one-way valve 17, a third hot fluorine electromagnetic valve 14 and a solvent storage tank 5, wherein the solvent storage tank 5 is connected with the evaporator 6, the mixer 10 is arranged on a parallel pipeline of a pipeline between the evaporator 6 and the gas-liquid separator 7, the first hot fluorine electromagnetic valve 8 and the hot fluorine bypass valve 9 are sequentially arranged on the pipeline between the compressor 1 and the mixer 10, the hot fluorine expansion valve 11 and the second hot fluorine electromagnetic valve 12 are arranged on the pipeline between the mixer 10 and the evaporator 6, and the third hot fluorine electromagnetic valve 14, the first hot fluorine one-way valve 15, the second hot fluorine one-way valve 17 are arranged on the pipeline between the supercooling heat exchanger 4 and the evaporator 6 and the hot fluorine bypass valve 9.
Optionally, the evaporator 6 is provided with a gas inlet 20, a gas outlet 21 and a liquid outlet 22, wherein the liquid outlet 22 is connected with the solvent storage tank 5.
Optionally, the compressor 1, the condenser 2, the liquid reservoir 3, the supercooling heat exchanger 4, the gas-liquid separator 7 and the evaporator 6 are subjected to explosion-proof treatment.
Optionally, the solvent storage tank 5 is provided with a solvent storage tank outlet 23.
The method of the ultralow temperature solvent condensation recovery system comprises the following steps:
When the ultralow temperature refrigeration system is operated, the refrigeration electromagnetic valve 13 and the third thermal fluorine electromagnetic valve 14 are opened, the first thermal fluorine electromagnetic valve 8 and the second thermal fluorine electromagnetic valve 12 are closed, the temperature of the refrigerant in the heat exchange tube of the evaporator 6 is between minus 50 ℃ and minus 60 ℃, and the solvent is sublimated and frosted on the surface of the heat exchange tube after entering the evaporator 6 through the evaporator gas inlet 20, so as to form a solvent frost layer;
When the hot fluorine solvent recovery system is operated, the first hot fluorine electromagnetic valve 8 and the second hot fluorine electromagnetic valve 12 are opened, the refrigeration electromagnetic valve 13 and the third hot fluorine electromagnetic valve 14 are closed, hot fluorine gas of the compressor 1 is divided into two paths after passing through the first hot fluorine electromagnetic valve 8, one path sequentially passes through the second hot fluorine one-way valve 17, the evaporator 6, the second hot fluorine electromagnetic valve 12 and the hot fluorine expansion valve 11 and enters the mixer 10, wherein the hot fluorine gas enters the evaporator 6 and exchanges heat with the solvent frost layer, the solvent frost layer absorbs heat and liquefies and then enters the solvent storage tank 5 through the evaporator liquid outlet 22, and finally is discharged through the solvent storage tank outlet 23 to finish recovery work; the other path of refrigerant enters a mixer 10 through a thermal fluorine bypass valve 9, and the two paths of refrigerant are mixed to obtain gaseous refrigerant, and the gaseous refrigerant enters a gas-liquid separator 7 to complete circulation.
It should be understood that the above description is not intended to limit the invention to the particular embodiments disclosed, but to limit the invention to the particular embodiments disclosed, and that the invention is not limited to the particular embodiments disclosed, but is intended to cover modifications, adaptations, additions and alternatives falling within the spirit and scope of the invention.
Claims (3)
1. An ultra-low temperature solvent condensation recovery system, comprising: the ultralow temperature refrigeration system comprises a compressor, a condenser, a liquid storage device, a supercooling heat exchanger and a gas-liquid separator which are sequentially connected through pipelines, wherein the gas-liquid separator is connected with the compressor, the supercooling heat exchanger is connected with the evaporator through a pipeline, the evaporator is connected with the gas-liquid separator, a supercooling expansion valve is arranged on a pipeline between the liquid storage device and the supercooling heat exchanger, an evaporation pressure regulating valve is arranged on a pipeline between the supercooling heat exchanger and the gas-liquid separator, a refrigeration electromagnetic valve is arranged on a pipeline between the evaporator and the gas-liquid separator, and a refrigeration expansion valve is arranged on a pipeline between the supercooling heat exchanger and the evaporator; the hot fluorine solvent recovery system comprises a first hot fluorine electromagnetic valve, a hot fluorine bypass valve, a mixer, a hot fluorine expansion valve, a second hot fluorine electromagnetic valve, a first hot fluorine one-way valve, a second hot fluorine one-way valve, a third hot fluorine electromagnetic valve and a solvent storage tank, wherein the solvent storage tank is connected with an evaporator, the mixer is arranged on a parallel pipeline of a pipeline between the evaporator and a gas-liquid separator, the first hot fluorine electromagnetic valve and the hot fluorine bypass valve are sequentially arranged on the pipeline between the compressor and the mixer, the hot fluorine expansion valve and the second hot fluorine electromagnetic valve are arranged on the pipeline between the mixer and the evaporator, and the third hot fluorine electromagnetic valve, the first hot fluorine one-way valve, the second hot fluorine one-way valve are arranged on the pipeline between a supercooling heat exchanger and the evaporator;
the evaporator is provided with a gas inlet, a gas outlet and a liquid outlet, wherein the liquid outlet is connected with the solvent storage tank.
2. The ultra-low temperature solvent condensation recovery system according to claim 1, wherein the solvent storage tank is provided with a solvent storage tank outlet.
3. A method of using the ultra-low temperature solvent condensation recovery system of claim 1 or 2, comprising the steps of:
When the ultralow temperature refrigerating system is operated, the refrigerating electromagnetic valve and the third thermal fluorine electromagnetic valve are opened, the first thermal fluorine electromagnetic valve and the second thermal fluorine electromagnetic valve are closed, the temperature of the refrigerant in the evaporator heat exchange tube is between minus 50 ℃ and minus 60 ℃, and the solvent is sublimated and frosted on the surface of the heat exchange tube after entering the evaporator through the gas inlet of the evaporator, so as to form a solvent frost layer;
when the hot fluorine solvent recovery system is operated, the first hot fluorine electromagnetic valve and the second hot fluorine electromagnetic valve are opened, the refrigeration electromagnetic valve and the third hot fluorine electromagnetic valve are closed, the hot fluorine gas of the compressor is divided into two paths after passing through the first hot fluorine electromagnetic valve, and one path sequentially passes through the second hot fluorine one-way valve, the evaporator, the second hot fluorine electromagnetic valve and the hot fluorine expansion valve and enters the mixer, wherein the hot fluorine gas exchanges heat with the solvent frost layer after entering the evaporator, and after the solvent frost layer absorbs heat and liquefies, the hot fluorine gas enters the solvent storage tank through the liquid outlet of the evaporator and finally is discharged through the outlet of the solvent storage tank, so that the recovery work is completed; the other path of refrigerant enters the mixer through the thermal fluorine bypass valve, and the two paths of refrigerant are mixed in the mixer to obtain gaseous refrigerant, and the gaseous refrigerant enters the gas-liquid separator to complete circulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202211129952.4A CN115518407B (en) | 2022-09-16 | 2022-09-16 | Ultralow-temperature solvent condensation recovery system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211129952.4A CN115518407B (en) | 2022-09-16 | 2022-09-16 | Ultralow-temperature solvent condensation recovery system and method |
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| CN115518407B true CN115518407B (en) | 2024-05-07 |
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| CN115518407A (en) | 2022-12-27 |
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