CN111981727A - Method for producing heat in an absorber from a solution containing HFO-1336mzz (Z) - Google Patents
Method for producing heat in an absorber from a solution containing HFO-1336mzz (Z) Download PDFInfo
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- CN111981727A CN111981727A CN202010782949.7A CN202010782949A CN111981727A CN 111981727 A CN111981727 A CN 111981727A CN 202010782949 A CN202010782949 A CN 202010782949A CN 111981727 A CN111981727 A CN 111981727A
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- 239000006096 absorbing agent Substances 0.000 title claims abstract description 58
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 239000002250 absorbent Substances 0.000 claims abstract description 38
- 230000002745 absorbent Effects 0.000 claims abstract description 38
- 238000000034 method Methods 0.000 claims abstract description 37
- 239000003507 refrigerant Substances 0.000 claims abstract description 33
- 238000010521 absorption reaction Methods 0.000 claims abstract description 27
- 230000008569 process Effects 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims description 29
- 239000000203 mixture Substances 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 12
- 239000002608 ionic liquid Substances 0.000 claims description 11
- RWRDLPDLKQPQOW-UHFFFAOYSA-N Pyrrolidine Chemical group C1CCNC1 RWRDLPDLKQPQOW-UHFFFAOYSA-N 0.000 claims description 9
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 claims description 9
- ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 claims description 7
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 7
- 239000003960 organic solvent Substances 0.000 claims description 7
- NQRYJNQNLNOLGT-UHFFFAOYSA-N Piperidine Chemical group C1CCNCC1 NQRYJNQNLNOLGT-UHFFFAOYSA-N 0.000 claims description 6
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 claims description 6
- 238000003795 desorption Methods 0.000 claims description 4
- ZUHZGEOKBKGPSW-UHFFFAOYSA-N tetraglyme Chemical compound COCCOCCOCCOCCOC ZUHZGEOKBKGPSW-UHFFFAOYSA-N 0.000 claims description 4
- 125000005496 phosphonium group Chemical group 0.000 claims description 3
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 claims description 3
- 125000001453 quaternary ammonium group Chemical group 0.000 claims description 3
- SBZXBUIDTXKZTM-UHFFFAOYSA-N diglyme Chemical compound COCCOCCOC SBZXBUIDTXKZTM-UHFFFAOYSA-N 0.000 claims 1
- 239000003921 oil Substances 0.000 description 13
- 239000012530 fluid Substances 0.000 description 10
- 238000009833 condensation Methods 0.000 description 8
- 230000005494 condensation Effects 0.000 description 8
- 239000007789 gas Substances 0.000 description 8
- 230000008859 change Effects 0.000 description 7
- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 description 6
- 239000010687 lubricating oil Substances 0.000 description 6
- NLOLSXYRJFEOTA-UPHRSURJSA-N (z)-1,1,1,4,4,4-hexafluorobut-2-ene Chemical compound FC(F)(F)\C=C/C(F)(F)F NLOLSXYRJFEOTA-UPHRSURJSA-N 0.000 description 5
- 238000005057 refrigeration Methods 0.000 description 5
- -1 1-butyl-3-methylimidazolium tetrafluoroborate Chemical compound 0.000 description 4
- RWRIWBAIICGTTQ-UHFFFAOYSA-N difluoromethane Chemical compound FCF RWRIWBAIICGTTQ-UHFFFAOYSA-N 0.000 description 4
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- LVGUZGTVOIAKKC-UHFFFAOYSA-N 1,1,1,2-tetrafluoroethane Chemical compound FCC(F)(F)F LVGUZGTVOIAKKC-UHFFFAOYSA-N 0.000 description 2
- KYCQOKLOSUBEJK-UHFFFAOYSA-M 1-butyl-3-methylimidazol-3-ium;bromide Chemical compound [Br-].CCCCN1C=C[N+](C)=C1 KYCQOKLOSUBEJK-UHFFFAOYSA-M 0.000 description 2
- IKQCDTXBZKMPBB-UHFFFAOYSA-M 1-ethyl-3-methylimidazol-3-ium;iodide Chemical compound [I-].CCN1C=C[N+](C)=C1 IKQCDTXBZKMPBB-UHFFFAOYSA-M 0.000 description 2
- BMQZYMYBQZGEEY-UHFFFAOYSA-M 1-ethyl-3-methylimidazolium chloride Chemical compound [Cl-].CCN1C=C[N+](C)=C1 BMQZYMYBQZGEEY-UHFFFAOYSA-M 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000002427 irreversible effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- RVKZDIDATLDTNR-UHFFFAOYSA-N sulfanylideneeuropium Chemical compound [Eu]=S RVKZDIDATLDTNR-UHFFFAOYSA-N 0.000 description 2
- 238000004781 supercooling Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- ZDCWZRQSHBQRGN-UHFFFAOYSA-N 1,1,1,2,3-pentafluoropropane Chemical compound FCC(F)C(F)(F)F ZDCWZRQSHBQRGN-UHFFFAOYSA-N 0.000 description 1
- CJMUVMINGJFKIR-UHFFFAOYSA-N 2-(2-hydroxyethoxy)ethanol;methoxymethane Chemical compound COC.OCCOCCO CJMUVMINGJFKIR-UHFFFAOYSA-N 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 125000002147 dimethylamino group Chemical group [H]C([H])([H])N(*)C([H])([H])[H] 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000001648 tannin Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- 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
- F25B30/00—Heat pumps
- F25B30/04—Heat pumps of the sorption type
-
- 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
- F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
- F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
-
- 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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
-
- 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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
-
- 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
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
The present invention discloses a method for producing heat in an absorber from a solution containing HFO-1336mzz (z), said solution containing (a) HFO-1336mzz (z); (b) an absorbent capable of absorbing HFO-1336mzz (Z). In the process, vapor containing HFO-1336mzz (z) is absorbed by an absorbent in an absorber and gives off heat of absorption, and a heat transfer medium or refrigerant or a body to be heated is heated by the heat of absorption of the absorption process through the absorber. After the absorber outlet solution is depressurized and cooled by an expansion device, the heat of the heat transfer medium or refrigerant or cooled body is absorbed in the desorber, and vapor containing HFO-1336mzz (Z) is desorbed, and the heat transfer medium or refrigerant or cooled body is cooled.
Description
Technical Field
The present invention relates to a method for producing heat in an absorber from a solution containing HFO-1336mzz (Z) (Z-1,1,1,4,4, 4-hexafluoro-2-butene).
Background
The natural world contains a large amount of low-temperature heat energy such as geothermal energy, solar energy and the like, in addition, a large amount of low-temperature heat can be generated in the production process of human beings such as petrochemical industry, metallurgical building materials, food processing and the like, low-temperature waste heat can pollute the environment and cause energy waste if being directly discharged, and meanwhile, the demand of a heat source with the temperature of 80 ℃ or even higher in the industrial production process is high, so that the method has important environmental protection and economic benefits by utilizing a waste heat recovery technology to obtain high-temperature heat from a low-temperature heat source, and is a new development direction in the energy field of China.
Heat pump systems based on vapor compression are an effective way to increase the heat grade. At present, widely used medium-high temperature heat pump working media such as HFC-134a, HFC-410A and the like have no destructive effect on the atmospheric ozone layer, but have very high GWP values, are listed in the line of gradually reducing use by the international society, and are forbidden to be used.
The idea of obtaining high temperature heat in the existing patents is mainly two, one is to screen and obtain some novel refrigerants with good environmental protection performance and lower pressure at high temperature according to the physical parameters and thermal performance of the refrigerants, and use the refrigerants in a vapor compression refrigeration heat pump system, for example, the invention patent of the granted patent No. CN200610016352.1 proposes a novel high temperature heat pump working medium consisting of difluoromethane (HFC-32), dimethyl ether (DME), 1,1,1, 2-tetrafluoroethane (HFC-134a) according to a certain mass percentage, the invention patent of the granted patent No. CN201280007242.2 proposes that a working fluid containing Z-1,1,1,4,4, 4-hexafluoro-2-butene is condensed in a condenser to generate heating action, the invention patent of the granted patent No. CN201380039965.5 proposes that a supercritical working fluid cooler and a condenser contain E-1, extracting heat from a working fluid of 1,1,4,4, 4-hexafluoro-2-butene (HFO-1336mzz (e)), an invention patent of patent application No. CN201280052978.1 proposing condensing a vapor working fluid comprising 1,1,1,2, 3-pentafluoropropane and optionally Z-1,1,1,4,4, 4-hexafluoro-2-butene in a condenser and obtaining heat; another method is to provide a new high temperature heat pump system device or process, for example, the invention patent of the granted patent No. cn200910017389.x provides a two-stage heating high temperature heat pump device composed of a low pressure stage and a high pressure stage heating system, and the invention patent of the granted patent No. CN200710018736.1 provides a high temperature heat pump system with a vortex tube, which connects the high temperature gas outlet of the vortex tube with the refrigerant inlet of the condenser to prepare high temperature hot water.
Although working fluids or system flows of the novel high-temperature heat pump refrigerant or the novel high-temperature heat pump system are different, the refrigerant vapor is condensed in a condenser, and the heat of condensation is absorbed through a heat transfer medium to obtain high-temperature heat, the refrigerant is subjected to an isothermal or approximately isothermal phase change process in the condenser and an evaporator, the matching performance of the refrigerant with the heat transfer temperature difference of the heat transfer medium is poor, irreversible loss is large, and the coefficient of performance of the system is reduced. In addition, when the heating temperature is higher, the corresponding condensing pressure is high, the pressure bearing requirement on the heat exchange equipment is high, and the equipment manufacturing cost is high.
In contrast to these patents, this patent proposes absorbing a solution containing HFO-1336mzz (Z) (Z-1,1,1,4,4, 4-hexafluoro-2-butene) in an absorber using an absorbent, in which a temperature-varying exothermic process occurs, the temperature difference in heat transfer between the system and the heat transfer medium can be better matched, and at the same time, the pressure-bearing capacity of the apparatus is required to be reduced because the absorption pressure is lower than the condensation pressure at the same temperature due to the presence of the absorbent.
Disclosure of Invention
In order to solve the problems of poor heat transfer temperature difference matching of a system and a heat transfer medium and high pressure bearing requirement of heat exchange equipment, the invention provides a method for heating in an absorber by adopting a solution containing HFO-1336mzz (Z) (Z-1,1,1,4,4, 4-hexafluoro-2-butene), wherein the absorber and an absorber are adopted to replace a condenser and an evaporator in a traditional vapor compression refrigeration system, and simultaneously, the solution containing HFO-1336mzz (Z) is preferably subjected to temperature change heat release and temperature change heat absorption in the absorber and the absorber so as to realize better matching of the heat transfer temperature difference of the system and the heat transfer medium; meanwhile, due to the existence of the absorbent, the absorption pressure or the desorption pressure is far lower than the condensation pressure or the evaporation pressure at the same temperature respectively, so that the pressure bearing requirement on equipment is reduced.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
a method for producing heat in an absorber from a solution containing HFO-1336mzz (z), comprising absorbing vapor containing HFO-1336mzz (z) in the absorber and releasing the heat of absorption.
As one of the preferred embodiments of the present invention, the solution containing HFO-1336mzz (Z) includes HFO-1336mzz (Z) and an absorbent capable of absorbing HFO-1336mzz (Z).
As one of the preferable embodiments of the present invention, the absorbent is an organic solvent or an ionic liquid or a mixture of the two; wherein the organic solvent is one or more of dimethylamine, dimethylformamide, dimethyl ether, diethylene glycol and tetraethylene glycol dimethyl ether; the ionic liquid is any one or a mixture of more of imidazole, pyridine, quaternary ammonium, quaternary phosphonium, pyrrolidine and piperidine ionic liquids.
As one of preferable embodiments of the present invention, the ionic liquid is any one or a mixture of more of 1-butyl-3-methylimidazolium tetrafluoroborate, 1-butyl-3-methylimidazolium bromide, 1-butyl-2, 3-dimethylimidazolium chloride, 1-ethyl-3-methylimidazolium hexafluorophosphate, 1-ethyl-3-methylimidazolium chloride and 1-ethyl-3-methylimidazolium iodide.
As one of preferable embodiments of the present invention, a heat transfer medium or refrigerant is passed through the absorber, the heat transfer medium or refrigerant is heated by the heat of absorption in the absorption process, and the heated heat transfer medium or refrigerant heats the body to be heated.
As one of preferable embodiments of the present invention, the body to be heated is passed through the absorber, and the body to be heated is heated by the absorption heat of the absorption process.
As one of the preferred embodiments of the present invention, an expansion device is employed to reduce the pressure and temperature of the HFO-1336mzz (z) -containing solution from the absorber.
As one of the preferred embodiments of the present invention, the HFO-1336mzz (z) -containing solution at the outlet of the expansion device enters a desorber, a heat transfer medium or refrigerant or a cooled body is passed through the desorber, the HFO-1336mzz (z) -containing solution absorbs heat of the heat transfer medium or refrigerant or cooled body, and vapor containing HFO-1336mzz (z) is desorbed, and the heat transfer medium or refrigerant or cooled body provides desorption process heat to be cooled.
As one of the preferable schemes of the invention, the outlet of the desorber is provided with a gas-liquid separator, liquid flowing out of the gas-liquid separator is sent to the absorber by a solution pump, vapor flowing out of the gas-liquid separator is compressed by a compressor, and vapor with high pressure and high temperature and containing HFO-1336mzz (Z) flows out of the compressor and enters the absorber to be absorbed by the absorbent.
As one of preferable embodiments of the present invention, the compressor includes any one of a centrifugal compressor, a screw compressor, a scroll compressor, a reciprocating compressor, and an axial flow compressor.
Compared with the prior art, the invention has the beneficial technical effects that:
(1) the solution containing HFO-1336mzz (Z) is used as the working fluid in the absorber, the HFO-1336mzz (Z) is non-toxic and non-flammable, the ODP value of ozone depletion potential is zero, the GWP value of greenhouse effect potential is 2, the average service life of the atmosphere is only about 22 days, and the environment performance is excellent.
(2) The traditional vapor compression refrigeration/heat pump system realizes heat release and heat absorption processes through condensation or evaporation of working media in a condenser and an evaporator, the working pressure corresponding to the condenser is determined by the condensation temperature, and under the same condition, the preparation temperature is higher, the pressure is higher, and the efficiency is reduced. The invention adopts the absorber to replace the condenser in the traditional vapor compression refrigeration/heat pump system, the solution containing HFO-1336mzz (Z) generates the absorption process in the absorber, the highest pressure of the system is under the same heating temperature, the working pressure corresponding to the absorption process is lower than the working pressure corresponding to the condensation process, the pressure bearing requirement on the equipment is reduced, and the manufacturing cost is reduced. Under the same pressure condition, the obtainable heating temperature is increased, and the low-grade heat energy recycling effect is improved.
(3) In the traditional vapor compression refrigeration/heat pump system, an isothermal or approximately isothermal phase change heat transfer process occurs inside a condenser and an evaporator, the heat transfer temperature difference matching between a refrigerant and a heat transfer medium is poor, while the solution containing HFO-1336mzz (Z) generates temperature change heat release and temperature change heat absorption in an absorber and an desorber, and the irreversible loss caused by the heat transfer temperature difference is reduced in the temperature change heat transfer process.
(4) Under the same working condition, because the heat of absorption is greater than the heat of condensation, the heat of desorption is greater than the heat of evaporation, the heat release per unit mass of refrigerant in the solution absorption process is greater than the heat release per unit mass of refrigerant in the condensation process, and when the same heat is produced, the power consumption of the compressor is reduced, and the system performance coefficient is improved.
Drawings
FIG. 1 is a system flow chart of embodiment 1 adopted for implementing the method of the invention.
FIG. 2 is a system flow chart of embodiment 2 adopted for implementing the method of the invention
FIG. 3 is a system flow chart of embodiment 3 adopted for implementing the method of the invention.
1-a compressor; 2-an absorber; 3-a desorber; 4-an expansion device; 5-solution heat exchanger; 6-an oil separator; 7-gas-liquid separator; 8-solution pump.
Detailed Description
The invention will be further described with reference to specific examples, but the scope of the invention is not limited thereto.
The present invention provides a method for producing heat in an absorber from a solution containing HFO-1336mzz (z), said solution containing (a) HFO-1336mzz (z); (b) an absorbent capable of absorbing HFO-1336mzz (Z), vapor comprising HFO-1336mzz (Z) being absorbed by the absorbent in the absorber and releasing heat of absorption; the absorbent is organic solvent or their mixture, ionic liquid or their mixture.
Preferably, the absorbent for absorbing HFO-1336mzz (z) may be an organic solvent, an ionic liquid, or a mixture thereof, an organic solution such as: the organic solvent is DMA (dimethylamine), DMF (dimethylformamide), DMEDEG (dimethyl ether diethylene glycol), E181 (tetraglyme) and the like, and the ionic liquid can be preferably imidazole-based, pyridine-based, quaternary ammonium-based, quaternary phosphonium-based, pyrrolidine-based and piperidine-based ionic liquids, such as 1-butyl-3-methylimidazolium tetrafluoroborate, 1-butyl-3-methylimidazolium bromide, 1-butyl-2, 3-dimethylimidazolium chloride, 1-ethyl-3-methylimidazolium hexafluorophosphate, 1-ethyl-3-methylimidazolium chloride, 1-ethyl-3-methylimidazolium iodide and the like.
The method can adopt a system consisting of a compressor, an absorber, an expansion device and the absorber to realize heating. The system of examples 1-3 can be a screw compressor, or a centrifugal, piston, or scroll type compressor.
Example 1
As shown in fig. 1, in the solution absorption heat exchange system according to this embodiment, an air outlet of a compressor 1 is connected to an air inlet of an oil separator 6, an air outlet of the oil separator 6 is connected to an air inlet of an absorber 2, a solution outlet of the absorber 2 is connected to a first inlet of a solution heat exchanger 5, a first outlet of the solution heat exchanger 5 is connected to a solution inlet of a desorber 3 through an expansion device 4, a solution outlet of the desorber 3 is connected to an inlet of a gas-liquid separator 7, a gas outlet of the gas-liquid separator 7 is connected to an air inlet of the compressor 1, a liquid outlet of the gas-liquid separator 7 is connected to a second inlet of the solution heat exchanger 5, and a second outlet of the solution heat exchanger 5.
The outlet of the compressor 1 contains HFO-1336mzz (Z), the mixture a of lubricating oil enters an oil separator 6, the lubricating oil separated by the oil separator 6 passes through a liquid outlet and is decompressed into k to return to the compressor, the vapor b of the gas outlet of the oil separator 6 containing HFO-1336mzz (Z) enters an absorber 2, the vapor is absorbed by an absorbent j capable of absorbing the HFO-1336mzz (Z) at the outlet of a solution heat exchanger 5 in the absorber 2 and releases the heat of absorption, and meanwhile, a heat transfer medium or refrigerant or a body m to be heated in the absorber exchanges heat with the solution containing the HFO-1336mzz (Z) and is heated into n. The outlet of the absorber contains HFO-1336mzz (Z) and absorbent solution c, enters the solution heat exchanger 5, exchanges heat with absorbent solution i which can absorb HFO-1336mzz (Z) at the outlet of the solution pump 8, the temperature is reduced to d, the absorbent solution is expanded by an expansion device 4, cooled to e, and enters a desorber 3, the solution containing HFO-1336mzz (Z) absorbs heat of a heat transfer medium or a refrigerant or a body p to be cooled in the desorber 3, and vapor containing HFO-1336mzz (Z) is desorbed, and the heat transfer medium or the refrigerant or the body to be cooled is cooled to q. The mixture f of HFO-1336mzz (Z) and absorbent at the outlet of the desorber 3 enters the gas-liquid separator 7, the liquid outlet of the gas-liquid separator 7 can absorb the absorbent solution h of HFO-1336mzz (Z) and is sent to the solution heat exchanger 5 through the solution pump 8 to exchange heat with the mixture c at the outlet of the absorber, the temperature rises from i to j, and the working fluid g of HFO-1336mzz (Z) at the gas outlet of the gas-liquid separator 7 enters the compressor 1 to be compressed, thereby completing a cycle.
Example 2
As shown in fig. 2, this embodiment is different from embodiment 1 in that a super-cooling pipe 31 is provided in the desorber 3 and a super-heating pipe 21 is provided in the absorber 2. The working process is as follows:
the outlet of the compressor 1 contains HFO-1336mzz (Z), a mixture a ' of lubricating oil enters an oil separator 6, the lubricating oil separated by the oil separator 6 passes through a liquid outlet and is decompressed into o ' to return to the compressor, and the gas outlet of the oil separator 6 contains vapor b ' of the HFO-1336mzz (Z) and enters an absorber 2; the outlet of the solution heat exchanger 5 can absorb HFO-1336mzz (Z) absorbent k 'which is preheated to l' in the absorber 2 and then enters the absorber 2, vapor b 'is absorbed by the absorbent l' in the absorber 2 and releases absorption heat, and meanwhile, a heat transfer medium or refrigerant or a body m to be heated in the absorber 2 exchanges heat with a solution containing HFO-1336mzz (Z) and is heated to n. The outlet of the absorber contains HFO-1336mzz (Z) and absorbent solution c 'enter the solution heat exchanger 5 to exchange heat with absorbent solution j' which can absorb HFO-1336mzz (Z) at the outlet of the solution pump 8, the absorbent solution j 'enters a desorber 3 after the temperature is reduced to d' and is precooled to e ', and then enters the desorber 3 after being expanded by an expansion device 4 to reduce the temperature and the pressure to f', the solution containing HFO-1336mzz (Z) absorbs the heat of heat transfer medium or refrigerant or body to be cooled p in the desorber 3 and desorbs vapor containing HFO-1336mzz (Z), and the heat transfer medium or refrigerant or body to be cooled is cooled to q. The mixture g 'of HFO-1336mzz (Z) and absorbent at the outlet of the desorber 3 enters the gas-liquid separator 7, the absorbent solution i' of HFO-1336mzz (Z) at the liquid outlet of the gas-liquid separator 7 can be sent to the solution heat exchanger 5 after being pressurized to j 'by the solution pump 8, the temperature is raised to k' from j ', and the working fluid h' of HFO-1336mzz (Z) at the gas outlet of the gas-liquid separator 7 enters the compressor 1 for compression, thus completing a cycle.
The superheated pipeline is arranged in the embodiment, so that the temperature of the absorbent solution entering the absorber is increased, and higher heating temperature can be obtained under the condition of not increasing the pressure of the absorber; the supercooling pipeline is added to reduce the temperature of the solution entering the desorber, so that heat at lower temperature can be absorbed under the condition of not reducing the pressure of the desorber; meanwhile, the system pressure ratio is reduced, the compressor does work and the system COP is increased.
Example 3
As shown in fig. 3, the present embodiment is different from embodiment 1 in that the present embodiment further includes a superheater 9 and a subcooler 10, the superheater 9 is provided between the oil separator 6 and the heat absorber 2, and the subcooler 10 is provided between the desorber 3 and the gas-liquid separator 7. The working process is as follows:
the mixture a 'of HFO-1336mzz (Z) and lubricating oil at the outlet of the compressor 1 enters an oil separator 6, the lubricating oil separated by the oil separator 6 passes through a liquid outlet and is decompressed into s' to return to the compressor, the vapor b 'of the HFO-1336mzz (Z) at the gas outlet of the oil separator 6 is divided into two parts, one part enters an absorber 2, the two parts are absorbed by an absorbent r' which can absorb the HFO-1336mzz (Z) at the outlet of a superheater 9 in the absorber 2 and emit absorption heat, and meanwhile, a heat transfer medium or refrigerant or a body u 'to be heated in the absorber 2 exchanges heat with the solution containing the HFO-1336mzz (Z) and is heated into v'; the other part enters a superheater 9 for preheating the absorbent q' which can absorb HFO-1336mzz (Z) from the outlet of the solution heat exchanger 5. The absorber 2 outlet contains HFO-1336mzz (z) in solution e "with absorbent, combined with a solution f "containing HFO-1336mzz (Z) and absorbent at the outlet of the superheater 9 into g" and enters the solution heat exchanger 5, exchanges heat with absorbent solution p 'which can absorb HFO-1336mzz (Z) at the outlet of the solution pump 8, the temperature is reduced to h', is subcooled into i by a flow of fluid t from the outlet of the expansion device 4 through the subcooler 10, enters the expansion device 4 for expansion, temperature reduction and pressure reduction into j' and then enters the desorber 3, within the desorber 3, a solution containing HFO-1336mzz (z) absorbs heat from a heat transfer medium or refrigerant or body to be cooled x "which is cooled to y" and desorbs vapor containing HFO-1336mzz (z). The mixture k 'of HFO-1336mzz (Z) and absorbent at the outlet of the desorber 3 and the mixture l' of HFO-1336mzz (Z) and absorbent at the outlet of the subcooler 10 are combined into m 'and jointly enter a gas-liquid separator 7, the liquid outlet of the gas-liquid separator 7 can absorb the absorbent solution o' of the HFO-1336mzz (Z) and send the absorbent solution o 'to the solution heat exchanger 5 after being pressurized into p' by the solution pump 8 to exchange heat with the mixture g 'at the outlet of the absorber 2, the temperature is increased from p' to q 'and enter the superheater, and the working fluid n' of HFO-1336mzz (Z) at the gas outlet of the gas-liquid separator 7 enters the compressor 1 to be compressed, thereby completing a cycle.
This example uses a subcooler and superheater to perform similar functions as example 2, allowing higher heating temperatures to be achieved and lower temperatures to be absorbed without reducing the desorber pressure.
While the embodiments of the present invention have been described in detail, it will be apparent to those skilled in the art that variations may be made in the embodiments without departing from the spirit of the invention, and such variations are to be considered within the scope of the invention.
Claims (10)
1. A method for producing heat in an absorber from a solution containing HFO-1336mzz (Z), characterized in that vapor containing HFO-1336mzz (Z) is absorbed in the absorber and the heat of absorption is released.
2. The method according to claim 1, wherein said solution containing HFO-1336mzz (z) comprises HFO-1336mzz (z) and an absorbent capable of absorbing HFO-1336mzz (z).
3. The method according to claim 2, wherein the absorbent is an organic solvent or an ionic liquid or a mixture of both.
4. The method of claim 3, wherein the organic solvent is a mixture of any one or more of dimethylamine, dimethylformamide, diglyme, tetraglyme; the ionic liquid is any one or a mixture of more of imidazole, pyridine, quaternary ammonium, quaternary phosphonium, pyrrolidine and piperidine ionic liquids.
5. A method according to claim 2, characterized in that a heat transfer medium or refrigerant is passed through the absorber, the heat transfer medium or refrigerant being heated by the heat of absorption of the absorption process, the heated heat transfer medium or refrigerant in turn heating the body to be heated.
6. A method according to claim 2, characterized in that the body to be heated is passed through the absorber, the body to be heated being heated by the heat of absorption of the absorption process.
7. The process of claim 5 or 6 wherein an expansion device is employed to reduce the pressure and temperature of said solution from the absorber containing HFO-1336mzz (z).
8. The method according to claim 7, wherein HFO-1336mzz (z) containing solution at the expansion device outlet enters a desorber through which a heat transfer medium or refrigerant or chilled body is passed, HFO-1336mzz (z) containing solution absorbs heat of the heat transfer medium or refrigerant or chilled body and desorbs vapor containing HFO-1336mzz (z), which is chilled providing the heat of the desorption process.
9. The method according to claim 8, wherein the desorber outlet is provided with a gas-liquid separator, liquid flowing out of the gas-liquid separator is pumped into the absorber by a solution pump, vapor flowing out of the gas-liquid separator is compressed by a compressor, and high pressure high temperature vapor containing HFO-1336mzz (z) from the compressor enters the absorber to be absorbed by the absorbent.
10. The method of claim 9, wherein the compressor comprises any of a centrifugal, screw, scroll, reciprocating, axial compressor.
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