CN101918771B - System and method for absorption solution circulation - Google Patents
System and method for absorption solution circulation Download PDFInfo
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- CN101918771B CN101918771B CN2009801022151A CN200980102215A CN101918771B CN 101918771 B CN101918771 B CN 101918771B CN 2009801022151 A CN2009801022151 A CN 2009801022151A CN 200980102215 A CN200980102215 A CN 200980102215A CN 101918771 B CN101918771 B CN 101918771B
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- absorbent
- absorbent solution
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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
- 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
- F25B15/06—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being water vapour evaporated from a salt solution, e.g. lithium bromide
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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
- F25B2315/00—Sorption refrigeration cycles or details thereof
- F25B2315/002—Generator absorber heat exchanger [GAX]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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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- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Sorption Type Refrigeration Machines (AREA)
- Gas Separation By Absorption (AREA)
Abstract
An absorption solution circulating system and a method thereof are disclosed. The absorption solution is composed of an absorbent and a working medium. The absorption solution circulating system comprises a generator (10), an absorber (20), an absorbent crystallizer (40) and an absorption solution self heat exchanger (30). The absorbent crystallizer (40) is used for cooling the absorption solution from the generator (10) and/or the absorption solution from the absorber (20), and forming an absorption solution after crystallization and an absorbent crystal. The absorption solution after crystallization is conveyed to the generator (10). The absorbent crystal is conveyed to the absorber (20). The absorption solution self heat exchanger is used for heat exchange between the absorption solution after crystallization and/or the absorbent crystal and the absorption solution from the generator (10) and/or the absorption solution from the absorber (20).
Description
Technical field
The present invention relates to a kind of circulating technology of Thermal Power Engineering Field, particularly a kind of absorbent solution circulating system and round-robin method for absorption heat pump cycle.
Background technology
See also shown in Figure 1ly, existing absorption heat pump circulating system utilizes absorbent solution can separate out the steam of low boiling component under certain condition, can absorb consumingly again this characteristic of low boiling component steam and finish heat pump cycle under another condition.At present two component solutions that adopt claim traditionally that as absorbent solution low boiling component is working medium more in the Absorption Refrigerator, and high boiling component is absorbent, and the two forms working medium pair, generally adopt water-lithium bromide working medium pair.Existing absorption heat pump circulating system mainly comprises: in establish heat exchanger 110 generator 101, in establish heat exchanger 120 condenser 102, in establish heat exchanger 130 evaporimeter 103 and in establish the absorber 104 of heat exchanger 140, also have in addition as the absorbent solution pump of auxiliary equipment and flow controller (not shown) etc.Generator 101 links to each other by vapor passageway 109 with condenser 102, and evaporimeter 103 links to each other by vapor passageway 108 with absorber 104.Absorbent solution circulates between generator 101 and absorber 104 by absorbent solution pipeline 106 and 105.
The course of work of existing absorption heat pump cycle comprises: (1) utilizes driving heat source (such as steam, hot water and combustion product gases etc.) to heat in generator 101 from what absorber 104 transported to have a certain density lithium-bromide solution, so that the water in the lithium-bromide solution is evaporated, the dense lithium-bromide solution of formation is recycled in the absorber 104.(2) steam enters in the condenser 102 by vapor passageway 109, is condensed into condensed water by the cooling working medium in the heat exchanger 120 again.(3) this condensed water enters in the evaporimeter 103 through condensing water conduit 107, the heat of working medium in the absorption heat-exchange device 130 and become the low-pressure water steam, the heat of the working medium in the heat exchanger 130 is absorbed rear temperature to be reduced, thereby becomes the externally cold of output of this absorption heat pump circulating system.(4) above-mentioned low-pressure water steam enters generator 101 by vapor passageway 108, absorbed and produced from the dense lithium-bromide solution in the generator 101 and absorbed heat, the concentration of lithium-bromide solution reduces simultaneously, described absorption heat is taken away by the cooling working medium in the heat exchanger 140, and the lithium-bromide solution of low concentration is circulated in the generator 101.
Above-mentioned existing heat pump circulating system also can outwards provide heat by absorber, thereby consists of heating system.
For absorption heat pump cycle, the lithium bromide concentration of absorber is higher, and then the temperature of its outside quantity of heat given up is that grade is just higher, and on the other hand, the lithium bromide concentration of generator is lower, and then the temperature of its required external drive thermal source is that grade is just lower.; above-described existing absorption heat pump circulating system; because the lithium bromide concentration of its absorber always is lower than the lithium bromide concentration of its generator; so when the lithium bromide concentration by improving its absorber to improve temperature rise (the absorption temperature of absorber and the evaporating temperature of evaporimeter poor) or outwards during the grade of quantity of heat given up, must cause the increase of its generator lithium bromide concentration.And concentrate at the lithium-bromide solution of 101 pairs of high concentrations of generator in order to realize, just must drop into high-grade external drive thermal source by 110 pairs of lithium-bromide solutions of heat exchanger, the raising that this has not only limited its coefficient of performance and temperature rise has also limited effective utilization of low temperature exhaust heat.
Summary of the invention
Main purpose of the present invention is to overcome the problem that existing absorption heat pump circulating system exists, and provide a kind of absorbent solution circulating system and method, technical problem to be solved is to realize the circulation of absorbent solution between generator and absorber in absorption heat pump cycle, thereby improves grade and efficient that absorption heat pump cycle is outwards exported cold or heat.
The object of the invention to solve the technical problems realizes by the following technical solutions.According to a kind of absorbent solution circulating system that the present invention proposes, described absorbent solution is comprised of absorbent and working medium, and this absorbent solution circulating system comprises: generator and absorber, and this system also comprises:
Absorbent crystallizer, be used for cooling off from the absorbent solution of generator and/or from the absorbent solution of absorber, absorbent solution and absorbent crystallization after the formation crystallization, absorbent solution is transported to generator after the described crystallization, and described absorbent crystallization or the absorbent solution that contains the absorbent crystallization are transported to absorber; And absorbent solution is from heat exchanger,
This absorbent solution absorbent solution and/or absorbent crystallization or contain the absorbent solution of absorbent crystallization after heat exchanger is used for described crystallization and are carried out heat exchange from the absorbent solution of generator and/or from the absorbent solution of absorber; Perhaps
This absorbent solution from heat exchanger be used for the absorbent solution of in the future self-absorption device with from the crystallization of absorbent crystallizer after absorbent solution carry out heat exchange.
This absorbent solution is used in the future self-absorption device from heat exchanger absorbent solution with carry out heat exchange from the absorbent crystallization of absorbent crystallizer or the absorbent solution that contains the absorbent crystallization; Perhaps
This absorbent solution from heat exchanger be used for the absorbent solution of in the future self-absorption device with from the crystallization of absorbent crystallizer after absorbent solution and absorbent crystallization or the absorbent solution that contains the absorbent crystallization carry out heat exchange.
Preferably, aforesaid absorbent solution circulating system, enter absorbent solution from heat exchanger after mixing from the absorbent solution of generator with from the absorbent solution of absorber, and carry out heat exchange from absorbent solution and the absorbent crystallization of absorbent crystallizer or the absorbent solution that contains the absorbent crystallization.
The object of the invention to solve the technical problems realizes by the following technical solutions.According to a kind of absorbent solution round-robin method that the present invention proposes, described absorbent solution is comprised of absorbent and working medium, and the method may further comprise the steps: in generator, absorbent solution is added thermosetting refrigerant vapor and the first absorbent solution; The first absorbent solution is transported in the absorber; The absorbent solution that enters absorber absorbs refrigerant vapor and forms the second absorbent solution; Described the second absorbent solution is cooled off absorbent solution after formation absorbent crystallization and the crystallization; Described absorbent crystallization or the absorbent solution that contains the absorbent crystallization are transported in the absorber, absorbent solution after the described crystallization is transported in the generator; The method also comprises:
Before absorbent solution is transported to generator after the described crystallization, and before described the second absorbent solution cooled off, absorbent solution was carried out heat exchange after described the second absorbent solution and the described crystallization; Perhaps
Before described absorbent crystallization is transported to absorber, and before described the second absorbent solution cools off, described absorbent crystallization or the absorbent solution and described the second absorbent solution that contain the absorbent crystallization are carried out heat exchange; Perhaps
Before absorbent solution is transported to generator after the described crystallization, described absorbent crystallization or the absorbent solution that contains the absorbent crystallization are transported to before the absorber, and before described the second absorbent solution was cooled off, absorbent solution and absorbent crystallization or the absorbent solution that contains the absorbent crystallization were carried out heat exchange after described the second absorbent solution and the crystallization; Perhaps
Before absorbent solution is transported to generator after the described crystallization, described absorbent crystallization or the absorbent solution that contains the absorbent crystallization are transported to before the absorber, before described the second absorbent solution is cooled off, and described the first absorbent solution is transported to before the absorber, described the first absorbent solution is mixed with described the second absorbent solution and is formed blended absorbent solution, and absorbent solution and absorbent crystallization or the absorbent solution that contains the absorbent crystallization are carried out heat exchange after this blended absorbent solution and the crystallization.
Preferably, aforesaid absorbent solution round-robin method, wherein said working medium are the mixture of water, methyl alcohol and ethanol one of them or several materials; Described absorbent is LiBr, LiCl, LiNO
3, NaBr, KBr, CaCl
2, MgBr
2And ZnCl
2The mixture of one of them or several materials.
The present invention compared with prior art has obvious advantage and beneficial effect.By above technical scheme as can be known, owing to having adopted absorbent crystallizer that the absorbent solution from generator is carried out crystallisation by cooling and Separation of Solid and Liquid, thereby form the absorbent solution of high concentration and the absorbent solution of low concentration, and be respectively applied to absorber and generator, can reduce the requirement to generator driving heat source grade, improve simultaneously the grade of the outside transfer heat of absorber, thereby a kind of technological approaches that more low-grade waste heat is converted into more high-grade available heat is provided.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of specification, below with preferred embodiment of the present invention and cooperate accompanying drawing to be described in detail as follows.
Description of drawings
Fig. 1 is the flow chart of existing absorption heat pump circulating system.
Fig. 2 is the flow chart of absorbent solution circulating system embodiment 1 of the present invention.
Fig. 3 is the flow chart of absorbent solution circulating system embodiment 2 of the present invention.
Fig. 4 is the flow chart of absorbent solution circulating system embodiment 3 of the present invention.
Fig. 5 is the flow chart of absorbent solution circulating system embodiment 4 of the present invention.
Fig. 6 is the flow chart of absorbent solution circulating system embodiment 5 of the present invention.
Fig. 7 is the flow chart that absorbent solution circulating system of the present invention is applied to an example of absorption heat pump cycle.
101: generator 102: condenser
103: evaporimeter 104: absorber
107: condensing water conduit 108,109: vapor passageway
110,120,130,140: heat exchanger
Realize the best mode of invention
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, its specific embodiment of absorption type heat pump system, structure, feature and effect thereof to foundation the present invention proposes are described in detail as follows.
Seeing also shown in Figure 2ly, is the flow chart of the absorbent solution circulating system of the embodiment of the invention 1.Described absorbent solution is comprised of absorbent and working medium, adopts water-lithium bromide working medium to as absorbent solution in the present embodiment.This absorbent solution circulating system comprises: generator 10, absorber 20 and absorbent crystallizer 40.
Described generator 10 is used for absorbent solution is carried out evaporation and concentration, namely inputs the absorbent solution of low concentration, exports simultaneously the absorbent solution of refrigerant vapor and high concentration.This generator 10 has refrigerant vapor output channel 11, absorbent solution input channel 13 and absorbent solution output channel 12.The absorbent solution concentration of absorbent solution input channel 13 inputs is lower, produced refrigerant vapor by the heating of external heat source (not shown) after entering generator 10, this steam is discharged by refrigerant vapor output channel 11, thereby the absorbent solution concentration in the generator 10 is improved.The absorbent solution of high concentration is from 12 outputs of absorbent solution output channel.Absorbent solution input and the absorbent solution output of generator 10 are carried out continuously.
Described absorber 20, the absorbent solution that is used for high concentration absorbs refrigerant vapor and discharges and absorbs heat.This absorber 20 has refrigerant vapor input channel 21, absorbent solution input channel 23 and absorbent solution output channel 22.It is the concentration of absorbent solution that the absorbent solution concentration of absorbent solution input channel 23 inputs is higher than 22 outputs of absorbent solution output channel.The refrigerant vapor that enters absorber 20 is absorbed to discharge by the absorbent solution of high concentration and absorbs heat, this absorbs heat and is exported by heat output equipment (not shown), the concentration of absorbent solution reduces simultaneously, and the absorbent solution after concentration reduces is by 22 outputs of absorbent solution output channel.Absorbent solution input and the absorbent solution output of absorber 20 are carried out continuously.
Absorbent solution circulating system as above-mentioned structure consists of can form the circulation of absorbent solution between generator 10 and absorber 20, realizes simultaneously entering the refrigerant vapor of absorber 20 via the effect of generator 10 outputs, thereby reaches material balance.Absorbent crystallization described in the present embodiment and the following embodiment is not used in and limits it is the absorbent crystalline particle only, and it also comprises the absorbent solution that contains the absorbent crystalline particle.
Compare with embodiment 1, the absorbent solution circulating system of following embodiment comprises that also absorbent solution is from heat exchanger 30, be used for to from the absorbent solution of generator and/or from the absorbent solution of absorber with carry out heat exchange from absorbent solution after the crystallization of absorbent crystallizer and/or absorbent crystallization, improve the temperature that enters the absorbent solution of generator and/or enter the absorbent solution of absorber, reduce simultaneously the temperature of the absorbent solution that enters absorbent crystallizer, be conducive to save the heat of the external heat source of the cold of external source and generator, improve external heat output quantity in the absorber.
Seeing also shown in Figure 3ly, is the flow chart of the embodiment of the invention 2 absorbent solution circulating systems.Compare with embodiment 1, the absorbent solution circulating system of the present embodiment also comprises absorbent solution from heat exchanger 30, is used for making from the absorbent solution of absorber 20 and absorbent solution after the crystallization of absorbent crystallizer 40 outputs carrying out heat exchange.The absorbent solution output channel 12 of generator 10 links to each other with the absorbent solution input channel of absorber, thereby will jointly be input in the absorber after the absorbent solution of generator 10 output and the described absorbent crystallized mixed.The absorbent solution from absorber after the process heat exchange is input to carries out crystallisation by cooling and Separation of Solid and Liquid in the absorbent crystallizer; Be transported to the generator 10 through the absorbent solution after the crystallization of absorbent crystallizer 40 outputs after the heat exchange.Because from the temperature of the absorbent solution of absorber 20 temperature far above absorbent solution after the crystallization of absorbent crystallizer 40 outputs, so through after the heat exchange, the absorbent solution temperature that enters absorbent crystallizer 40 reduces greatly, thereby can reduce the cold for the external source of cooling and absorbing solution.Simultaneously, greatly improve through the temperature from absorbent solution after the crystallization of absorbent crystallizer after the heat exchange, it is transported in the generator.Compare with embodiment 1, evaporate same refrigerant vapor, the present embodiment can reduce the heat of the external heat source of generator, thereby improves efficiency of energy utilization.
Seeing also shown in Figure 4ly, is the flow chart of the absorbent solution circulating system of the embodiment of the invention 3.Compare with embodiment 1, the absorbent solution circulating system of this example also comprises absorbent solution from heat exchanger 30, is used for making the absorbent solution from absorber 20 to carry out heat exchange with the absorbent crystallization of exporting from absorbent crystallizer 40.The absorbent solution output channel 12 of generator 10 links to each other with the absorbent solution input channel of absorber, thereby with the absorbent solution of generator 10 outputs and through jointly being input in the absorber after the absorbent crystallized mixed after the heat exchange.Absorbent solution is in absorbent solution input channel 13 is transported to generator 10 after the crystallization of absorbent crystallizer 40 output.The absorbent solution from absorber 20 after the process heat exchange is input to carries out crystallisation by cooling and Separation of Solid and Liquid in the absorbent crystallizer 40; Be transported to the absorber 20 through absorbent solution input channel 23 through the absorbent crystallization from absorbent crystallizer 40 outputs after the heat exchange.Since from the temperature of the absorbent solution of absorber 20 far above the temperature from the absorbent crystallization of absorbent crystallizer 40 outputs, so through after the heat exchange, the absorbent solution temperature that enters absorbent crystallizer 40 reduces greatly, thereby can reduce the cold for the external source of cooling and absorbing solution.Simultaneously, greatly improve through the temperature from the absorbent crystallization of absorbent crystallizer after the heat exchange, it is transported in the absorber, compare with embodiment 1, absorb the refrigerant vapor of same amount, can under higher operating temperature, discharge and absorb heat, thereby can improve the temperature of absorber outward supplying heat, improve the heat supply grade, thereby improve efficiency of energy utilization.
Seeing also shown in Figure 5ly, is the flow chart of the absorbent solution circulating system of the embodiment of the invention 4.Compare with embodiment 3, the present embodiment will be from solution after the crystallization of absorbent crystallizer 40 output also via absorbent solution from heat exchanger 30, make from the absorbent solution of absorber 20 and absorbent solution after the absorbent crystallization of absorbent crystallizer 40 outputs and crystallization and carry out simultaneously heat exchange.Be delivered in the generator 10 by absorbent solution input channel 13 through absorbent solution after the crystallization after the heat exchange.The absorbent solution output channel 12 of generator 10 links to each other with the absorbent solution input channel of absorber, thereby with the absorbent solution of generator 10 outputs and through jointly being input in the absorber after the absorbent crystallized mixed after the heat exchange.Absorbent solution is in absorbent solution input channel 13 is transported to generator 10 after the crystallization of absorbent crystallizer 40 output.The absorbent solution from absorber 20 after the process heat exchange is input to carries out crystallisation by cooling and Separation of Solid and Liquid in the absorbent crystallizer 40; Be transported to the absorber 20 through absorbent solution input channel 23 through the absorbent crystallization from absorbent crystallizer 40 outputs after the heat exchange.Because from the temperature of the absorbent solution of absorber 20 temperature far above absorbent solution after the absorbent crystallization of absorbent crystallizer 40 outputs and crystallization, so through after the heat exchange, the absorbent solution temperature that enters absorbent crystallizer 40 reduces greatly, thereby can reduce the cold for the external source of cooling and absorbing solution.Simultaneously, greatly improve through the temperature from the absorbent crystallization of absorbent crystallizer after the heat exchange, it is transported in the absorber, compare with embodiment 1, absorb the refrigerant vapor of same amount, can under higher operating temperature, discharge and absorb heat, thereby can improve the temperature of absorber outward supplying heat, improve the heat supply grade.Greatly improve through the temperature from solution after the crystallization of absorbent crystallizer after the heat exchange, it is transported in the generator, evaporates same refrigerant vapor, and the present embodiment can reduce the heat of the external heat source of generator, thereby improves efficiency of energy utilization.
Seeing also shown in Figure 6ly, is the flow chart of the absorbent solution circulating system of the embodiment of the invention 5.Compare with embodiment 4, the absorbent solution output channel 12 of the generator 10 of the present embodiment links to each other with the absorbent solution extraction duct 22 of absorber 20, and the node that links to each other is positioned at and entered absorbent solution before heat exchanger.From the absorbent solution of generator 10 with mix from the absorbent solution of absorber 20 after enter absorbent solution from heat exchanger 30, carry out simultaneously heat exchange with absorbent solution after the absorbent crystallization of absorbent crystallizer 40 output and crystallization.Be delivered in the generator 10 by absorbent solution input channel 13 through absorbent solution after the crystallization after the heat exchange; Be delivered in the absorber 20 by absorbent solution input channel 23 through the absorbent crystallization after the heat exchange.Will from the absorbent solution of generator 10 with mix from the absorbent solution of absorber 20 after carry out crystallisation by cooling, compare with previous embodiment, increased the amount of the absorbent solution of the crystallization that is cooled, thereby can obtain absorbent solution after the more crystallization, thereby can improve the service efficiency of absorbent crystallizer.
In the above-described embodiments, the working medium that forms absorbent solution can be the mixture of water, methyl alcohol and ethanol one of them or several materials; Described absorbent is LiBr, LiCl, LiNO
3, NaBr, KBr, CaCl
2, MgBr
2And ZnCl
2The mixture of one of them or several materials.
Embodiments of the invention 6 also propose a kind of absorbent solution round-robin method, adopt the described absorbent solution circulating system of above-described embodiment to carry out, and the method may further comprise the steps:
Absorbent solution in the generator is added thermosetting refrigerant vapor and the first absorbent solution, and described refrigerant vapor is by the pipeline output generator, and described the first absorbent solution is also passed through the pipeline output generator, and is transported in the absorber;
Provide refrigerant vapor to absorber, this refrigerant vapor is absorbed solution and absorbs and form the second absorbent solution and discharge simultaneously and absorb heat in absorber, and this absorbs heat by the output of heat output equipment;
The second absorbent solution output sink that part is above-mentioned, and the second absorbent solution of output cooled off produce the absorbent crystallization, absorbent solution after forming absorbent crystallization and crystallization after the Separation of Solid and Liquid;
Described absorbent crystallization is transported in the absorber, absorbent solution after the described crystallization is transported in the generator.
Each above-mentioned step can be carried out simultaneously, equates with the amount of the refrigerant vapor that provides to absorber from the amount of the refrigerant vapor of generator output, thereby makes above-mentioned absorbent solution cyclic process maintenance material balance.
1-5 is corresponding with above-described embodiment, and the first absorbent solution in the present embodiment is the absorbent solution from generator, and the second absorbent solution is the absorbent solution from absorber.
Better, embodiments of the invention 7 also propose a kind of absorbent solution round-robin method, compare with embodiment 6, also comprise: before absorbent solution is transported to generator after the described crystallization, and before described the second absorbent solution is cooled off, the step that absorbent solution is carried out heat exchange after described the second absorbent solution and the described crystallization.
Better, embodiments of the invention 8 also propose a kind of absorbent solution round-robin method, compare with embodiment 6, also comprise: before described absorbent crystallization is transported to absorber, and before described the second absorbent solution was cooled off, described absorbent crystallization and described the second absorbent solution were carried out heat exchange.
Better, embodiments of the invention 9 also propose a kind of absorbent solution round-robin method, compare with embodiment 6, also comprise: before absorbent solution is transported to generator after the described crystallization, described absorbent crystallization is transported to before the absorber, and before described the second absorbent solution was cooled off, absorbent solution was carried out heat exchange after described the second absorbent solution and described absorbent crystallization and the crystallization.
Better, embodiments of the invention 10 also propose a kind of absorbent solution round-robin method, compare with embodiment 6, also comprise: before absorbent solution is transported to generator after the described crystallization, described absorbent crystallization is before being transported to absorber, before described the second absorbent solution is cooled off, and described the first absorbent solution is transported to before the absorber, described the first absorbent solution is mixed formation blended absorbent solution with described the second absorbent solution, absorbent solution is carried out heat exchange after this blended absorbent solution and described absorbent crystallization and the crystallization.
In the absorbent solution round-robin method that the present invention proposes, wherein said working medium is the mixture of water, methyl alcohol and ethanol one of them or several materials; Described absorbent is LiBr, LiCl, LiNO
3, NaBr, KBr, CaCl
2, MgBr
2And ZnCl
2The mixture of one of them or several materials.
Seeing also shown in Figure 7ly, is the flow chart that absorbent solution circulating system of the present invention and method is applied to an example of absorption heat pump cycle, is used for improving the energy grade of low temperature exhaust heat, and adopts lithium bromide and water to form absorbent solution.Described low temperature exhaust heat is as the external heat source of generator 10 and evaporimeter 103, and absorber 20 is exported the heat after energy grades improve.
Example 1
This example is promoted to 100 ℃ low temperature exhaust heat the saturated vapor of 185 ℃ of temperature.This example comes cooler condenser and absorbent crystallizer with 32 ℃ cooling water.
Example 2
This example is promoted to 75 ℃ low temperature exhaust heat the saturated vapor of 150 ℃ of temperature.This example comes cooler condenser and absorbent crystallizer with 17 ℃ cooling water.
Example 3
This example is promoted to 90 ℃ low temperature exhaust heat the saturated vapor of 170 ℃ of temperature.This example comes cooler condenser with 32 ℃ cooling water, and the cold that adopts the steam compression type refrigerating circulation to produce comes cooling and absorbing agent crystallizer.
Comparative example
This comparative example adopts existing absorption heat pump circulating system shown in Figure 1,100 ℃ low temperature exhaust heats is promoted to the saturated vapor of 150 ℃ of temperature.The cooling water that this comparative example uses is identical with above-mentioned example 1.
Following table 1 is running parameter and the performance of above-mentioned example and comparative example.
Table 1
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, although the present invention discloses as above with preferred embodiment, yet be not to limit the present invention, any those skilled in the art, within not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, any simple modification that foundation technical spirit of the present invention is done above embodiment, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Industrial applicability
Absorbent solution circulating system of the present invention can be applicable to absorption heat pump cycle, owing to having adopted absorbent crystallizer that the absorbent solution from generator is carried out crystallisation by cooling and Separation of Solid and Liquid, thereby form the absorbent solution of high concentration and the absorbent solution of low concentration, and be respectively applied to absorber and generator, can reduce the requirement to generator driving heat source grade, improve simultaneously the grade of the outside transfer heat of absorber, thereby a kind of technological approaches that more low-grade waste heat is converted into more high-grade available heat is provided.
Claims (13)
1. absorbent solution circulating system, described absorbent solution is comprised of absorbent and working medium, and this absorbent solution circulating system comprises: generator and absorber, it is characterized in that, this system also comprises:
Absorbent crystallizer, be used for cooling off from the absorbent solution of generator and/or from the absorbent solution of absorber, absorbent solution and absorbent crystallization after the formation crystallization, absorbent solution is transported to generator after the described crystallization, and described absorbent crystallization or the absorbent solution that contains the absorbent crystallization are transported to absorber; And
Absorbent solution is from heat exchanger, is used for absorbent solution and/or absorbent crystallization after the described crystallization or contains the absorbent solution of absorbent crystallization, and carries out heat exchange from the absorbent solution of generator and/or from the absorbent solution of absorber.
2. absorbent solution circulating system, described absorbent solution is comprised of absorbent and working medium, and this absorbent solution circulating system comprises: generator and absorber, it is characterized in that, this system also comprises:
Absorbent crystallizer, be used for cooling off from the absorbent solution of generator and/or from the absorbent solution of absorber, absorbent solution and absorbent crystallization after the formation crystallization, absorbent solution is transported to generator after the described crystallization, and described absorbent crystallization or the absorbent solution that contains the absorbent crystallization are transported to absorber; And
Absorbent solution is used for the absorbent solution of in the future self-absorption device and carries out heat exchange from absorbent solution after the crystallization of absorbent crystallizer from heat exchanger.
3. absorbent solution circulating system, described absorbent solution is comprised of absorbent and working medium, and this absorbent solution circulating system comprises: generator and absorber, it is characterized in that, this system also comprises:
Absorbent crystallizer, be used for cooling off from the absorbent solution of generator and/or from the absorbent solution of absorber, absorbent solution and absorbent crystallization after the formation crystallization, absorbent solution is transported to generator after the described crystallization, and described absorbent crystallization or the absorbent solution that contains the absorbent crystallization are transported to absorber; And
Absorbent solution is from heat exchanger, the absorbent solution that is used in the future self-absorption device with carry out heat exchange from the absorbent crystallization of absorbent crystallizer or the absorbent solution that contains the absorbent crystallization.
4. absorbent solution circulating system, described absorbent solution is comprised of absorbent and working medium, and this absorbent solution circulating system comprises: generator and absorber, it is characterized in that, this system also comprises:
Absorbent crystallizer, be used for cooling off from the absorbent solution of generator and/or from the absorbent solution of absorber, absorbent solution and absorbent crystallization after the formation crystallization, absorbent solution is transported to generator after the described crystallization, and described absorbent crystallization or the absorbent solution that contains the absorbent crystallization are transported to absorber; And
Absorbent solution is from heat exchanger, the absorbent solution that is used in the future self-absorption device with carry out heat exchange from absorbent solution after the crystallization of absorbent crystallizer and absorbent crystallization or the absorbent solution that contains the absorbent crystallization.
5. absorbent solution circulating system according to claim 4, enter absorbent solution from heat exchanger after it is characterized in that mixing from the absorbent solution of generator with from the absorbent solution of absorber, and carry out heat exchange from absorbent solution and the absorbent crystallization of absorbent crystallizer or the absorbent solution that contains the absorbent crystallization.
6. absorbent solution round-robin method, described absorbent solution is comprised of absorbent and working medium, it is characterized in that the method may further comprise the steps:
In generator, absorbent solution is added thermosetting refrigerant vapor and the first absorbent solution;
The first absorbent solution is transported in the absorber;
The absorbent solution that enters absorber absorbs refrigerant vapor and forms the second absorbent solution;
Described the second absorbent solution is cooled off absorbent solution after formation absorbent crystallization and the crystallization;
Described absorbent crystallization or the absorbent solution that contains the absorbent crystallization are transported in the absorber, absorbent solution after the described crystallization is transported in the generator;
Before absorbent solution is transported to generator after the described crystallization, and before described the second absorbent solution cooled off, absorbent solution was carried out heat exchange after described the second absorbent solution and the described crystallization.
7. absorbent solution round-robin method according to claim 6 is characterized in that,
Wherein said working medium is the mixture of water, methyl alcohol and ethanol one of them or several materials; Described absorbent is LiBr, LiCl, LiNO
3, NaBr, KBr, CaCl
2, MgBr
2And ZnCl
2The mixture of one of them or several materials.
8. absorbent solution round-robin method, described absorbent solution is comprised of absorbent and working medium, it is characterized in that the method may further comprise the steps:
In generator, absorbent solution is added thermosetting refrigerant vapor and the first absorbent solution;
The first absorbent solution is transported in the absorber;
The absorbent solution that enters absorber absorbs refrigerant vapor and forms the second absorbent solution;
Described the second absorbent solution is cooled off absorbent solution after formation absorbent crystallization and the crystallization;
Described absorbent crystallization or the absorbent solution that contains the absorbent crystallization are transported in the absorber, absorbent solution after the described crystallization is transported in the generator;
Before described absorbent crystallization or the absorbent solution that contains the absorbent crystallization are transported to absorber, and before described the second absorbent solution was cooled off, described absorbent crystallization or the absorbent solution and described the second absorbent solution that contain the absorbent crystallization were carried out heat exchange.
9. absorbent solution round-robin method according to claim 8 is characterized in that,
Wherein said working medium is the mixture of water, methyl alcohol and ethanol one of them or several materials; Described absorbent is LiBr, LiCl, LiNO
3, NaBr, KBr, CaCl
2, MgBr
2And ZnCl
2The mixture of one of them or several materials.
10. absorbent solution round-robin method, described absorbent solution is comprised of absorbent and working medium, it is characterized in that the method may further comprise the steps:
In generator, absorbent solution is added thermosetting refrigerant vapor and the first absorbent solution;
The first absorbent solution is transported in the absorber;
The absorbent solution that enters absorber absorbs refrigerant vapor and forms the second absorbent solution;
Described the second absorbent solution is cooled off absorbent solution after formation absorbent crystallization and the crystallization;
Described absorbent crystallization or the absorbent solution that contains the absorbent crystallization are transported in the absorber, absorbent solution after the described crystallization is transported in the generator;
Before absorbent solution is transported to generator after the described crystallization, described absorbent crystallization or the absorbent solution that contains the absorbent crystallization are transported to before the absorber, and before described the second absorbent solution was cooled off, absorbent solution and absorbent crystallization or the absorbent solution that contains the absorbent crystallization were carried out heat exchange after described the second absorbent solution and the described crystallization.
11. absorbent solution round-robin method according to claim 10 is characterized in that,
Wherein said working medium is the mixture of water, methyl alcohol and ethanol one of them or several materials; Described absorbent is LiBr, LiCl, LiNO
3, NaBr, KBr, CaCl
2, MgBr
2And ZnCl
2The mixture of one of them or several materials.
12. an absorbent solution round-robin method, described absorbent solution is comprised of absorbent and working medium, it is characterized in that the method may further comprise the steps:
In generator, absorbent solution is added thermosetting refrigerant vapor and the first absorbent solution;
The first absorbent solution is transported in the absorber;
The absorbent solution that enters absorber absorbs refrigerant vapor and forms the second absorbent solution;
Described the second absorbent solution is cooled off absorbent solution after formation absorbent crystallization and the crystallization;
Described absorbent crystallization or the absorbent solution that contains the absorbent crystallization are transported in the absorber, absorbent solution after the described crystallization is transported in the generator;
Before absorbent solution is transported to generator after the described crystallization, described absorbent crystallization or the absorbent solution that contains the absorbent crystallization are transported to before the absorber, before described the second absorbent solution is cooled off, and described the first absorbent solution is transported to before the absorber, described the first absorbent solution is mixed with described the second absorbent solution and is formed blended absorbent solution, and absorbent solution and absorbent crystallization or the absorbent solution that contains the absorbent crystallization are carried out heat exchange after this blended absorbent solution and the described crystallization.
13. absorbent solution round-robin method according to claim 12 is characterized in that,
Wherein said working medium is the mixture of water, methyl alcohol and ethanol one of them or several materials; Described absorbent is LiBr, LiCl, LiNO
3, NaBr, KBr, CaCl
2, MgBr
2And ZnCl
2The mixture of one of them or several materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009801022151A CN101918771B (en) | 2008-01-08 | 2009-01-08 | System and method for absorption solution circulation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810002335 | 2008-01-08 | ||
| CN200810002335.1 | 2008-01-08 | ||
| CN2009801022151A CN101918771B (en) | 2008-01-08 | 2009-01-08 | System and method for absorption solution circulation |
| PCT/CN2009/000027 WO2009092280A1 (en) | 2008-01-08 | 2009-01-08 | System and method for absorption solution circulation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101918771A CN101918771A (en) | 2010-12-15 |
| CN101918771B true CN101918771B (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009100023820A Pending CN101482340A (en) | 2008-01-08 | 2009-01-08 | Absorbent solution circulating system and method |
| CN2009801022151A Expired - Fee Related CN101918771B (en) | 2008-01-08 | 2009-01-08 | System and method for absorption solution circulation |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009100023820A Pending CN101482340A (en) | 2008-01-08 | 2009-01-08 | Absorbent solution circulating system and method |
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| CN (2) | CN101482340A (en) |
| WO (1) | WO2009092280A1 (en) |
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| GR20120100123A (en) * | 2012-03-01 | 2013-10-15 | Βασιλειος Ευθυμιου Στυλιαρας | High-efficiency pump characterised by suction and modification of the solution content |
| CN105810985B (en) * | 2016-03-07 | 2018-07-06 | 大连理工大学 | Suitable for the ternary working medium pair of inverse electrodialysis formula thermo-electrically converting system |
| CN108917224B (en) * | 2018-07-09 | 2023-10-13 | 北京科技大学 | Composite thermodynamic cycle system for low-grade heat source power generation |
| CN114380433A (en) * | 2021-12-15 | 2022-04-22 | 湖南省特种设备检验检测研究院 | Arsenic-containing wastewater treatment process and system based on waste heat utilization |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4735641A (en) * | 1987-03-16 | 1988-04-05 | Cbi Research Corporation | Apparatus and method of producing refrigeration as ice at the triple point of water |
| US5181396A (en) * | 1988-09-28 | 1993-01-26 | A. Ahlstrom Corporation | Method of freezing and separation |
| CN101033897A (en) * | 2007-04-19 | 2007-09-12 | 北京科技大学 | System and method for transforming low temperature residual heat into steam |
| CN101566404A (en) * | 2007-04-19 | 2009-10-28 | 北京科技大学 | System and method for transforming low temperature residual heat into steam |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04116355A (en) * | 1990-09-05 | 1992-04-16 | Ebara Corp | Absorption refrigerating machine and operation thereof |
-
2009
- 2009-01-08 CN CNA2009100023820A patent/CN101482340A/en active Pending
- 2009-01-08 CN CN2009801022151A patent/CN101918771B/en not_active Expired - Fee Related
- 2009-01-08 WO PCT/CN2009/000027 patent/WO2009092280A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4735641A (en) * | 1987-03-16 | 1988-04-05 | Cbi Research Corporation | Apparatus and method of producing refrigeration as ice at the triple point of water |
| US5181396A (en) * | 1988-09-28 | 1993-01-26 | A. Ahlstrom Corporation | Method of freezing and separation |
| CN101033897A (en) * | 2007-04-19 | 2007-09-12 | 北京科技大学 | System and method for transforming low temperature residual heat into steam |
| CN101566404A (en) * | 2007-04-19 | 2009-10-28 | 北京科技大学 | System and method for transforming low temperature residual heat into steam |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009092280A1 (en) | 2009-07-30 |
| CN101918771A (en) | 2010-12-15 |
| CN101482340A (en) | 2009-07-15 |
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