CN111156737A - Heating type absorption-compression coupling heat pump waste heat recovery system - Google Patents
Heating type absorption-compression coupling heat pump waste heat recovery system Download PDFInfo
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- CN111156737A CN111156737A CN202010041064.1A CN202010041064A CN111156737A CN 111156737 A CN111156737 A CN 111156737A CN 202010041064 A CN202010041064 A CN 202010041064A CN 111156737 A CN111156737 A CN 111156737A
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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
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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
- F25B30/02—Heat pumps of the compression type
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
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- General Engineering & Computer Science (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
The invention discloses a heating type absorption-compression coupling heat pump waste heat recovery system, which belongs to the technical field of waste heat recovery and utilization, and is formed by connecting an absorption heat pump unit and a compression heat pump unit through a pipeline, wherein a compression evaporator of the compression heat pump unit is arranged inside an absorption condenser of the absorption heat pump unit and is coupled with the absorption condenser to form a heating type absorption-compression coupling module; hot water is subjected to heat exchange with an absorber of the absorption heat pump unit and a compression condenser of the compression heat pump unit to obtain high-temperature hot water; and the waste heat exchanger of the absorption heat pump unit exchanges heat with low-temperature heat source water to recover heat of low-temperature waste heat. The system has the advantages that the system can utilize the waste heat of more than 40 ℃, reduce the temperature of the waste heat to below 20 ℃, and increase the temperature of hot water from 45 ℃ to more than 70 ℃, thereby realizing deep utilization of the waste heat, energy conservation and emission reduction.
Description
Technical Field
The invention relates to the technical field of waste heat recovery and utilization, in particular to a heating type absorption-compression coupling heat pump waste heat recovery system.
Background
Along with the increasingly severe global energy situation, the problem of energy demand shortage is increasingly prominent, energy conservation and energy consumption reduction are more important, and the work of energy conservation and emission reduction becomes a consensus of the whole society. In the industrial production process, a large amount of primary energy is consumed, wherein the recovery of waste heat is an important energy-saving way along with the generation of various waste heat.
At present, the utilization of high-temperature waste heat is gradually mature, but the technology for recycling low-temperature waste heat is still not fast developed, and the low-temperature waste heat recycling technology also needs to draw high attention. The existing low-temperature waste heat recycling system cannot reduce the temperature of waste heat to below 20 ℃, and simultaneously, hot water is increased from 45 ℃ to above 70 ℃, and deep recycling of waste heat cannot be realized, so that the development of a low-temperature waste heat recycling technology and the expansion of the field of low-temperature waste heat are problems to be solved urgently in the current energy-saving and emission-reducing work.
Disclosure of Invention
The invention aims to provide a heating absorption-compression coupling heat pump waste heat recovery system, which is additionally provided with a compression heat pump unit on the basis of a heating absorption heat pump system and has the characteristics of capability of recovering waste heat above 40 ℃ and low system energy consumption.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a heating type absorption-compression coupling heat pump waste heat recovery system, which is characterized in that: the heat pump system comprises an absorption heat pump unit and a compression heat pump unit connected with the absorption heat pump unit;
the absorption heat pump unit comprises an absorber, an absorption evaporator, a generator, an absorption condenser and a waste heat exchanger, wherein a first spray disc, a second spray disc and a third spray disc are respectively arranged in the absorber and the absorption evaporator, a solution heat exchanger is arranged below the generator, the first spray disc and the third spray disc are both connected with the solution heat exchanger, the second spray disc is connected with the inside of the absorption condenser through a refrigerant pump, and the absorption evaporator and the generator are both connected with the waste heat exchanger; the compression heat pump unit comprises a compression evaporator and a compression condenser connected with the compression evaporator, and the compression evaporator is arranged in the absorption condenser to form a heating type absorption-compression coupling module.
Optionally, a first partition plate is arranged in the absorption heat pump unit, the absorber and the absorption evaporator are arranged above the first partition plate, and the generator and the absorption condenser are arranged below the first partition plate; and a first water retaining partition is arranged between the absorber and the absorption evaporator, and a second water retaining partition is arranged between the generator and the absorption condenser.
Optionally, the hot water supply system further comprises a hot water supply circulation loop a, wherein the hot water supply circulation loop a comprises a first passage and a second passage connected with the first passage in parallel; the first passage is formed by connecting a hot water supply inlet pipeline, the absorber and a hot water supply outlet pipeline in sequence; the second passage is formed by connecting the hot water supply inlet pipeline, the compression condenser and the hot water supply outlet pipeline in sequence.
Optionally, the low-temperature heat source water circulation loop B is further included, the low-temperature heat source water circulation loop B comprises the generator, the absorption evaporator and the waste heat exchanger, an upper low-temperature water connecting pipe of the waste heat exchanger is connected with a lower port pipeline of the generator, an upper port pipeline of the generator is connected with an upper port pipeline of the absorption evaporator, and a lower port pipeline of the absorption evaporator is connected with a lower low-temperature water connecting pipe of the waste heat exchanger.
Optionally, the heat pump unit further comprises a compression heat pump unit refrigerant circulation loop C, the compression heat pump unit refrigerant circulation loop C comprises the compression evaporator, the compression condenser, the compressor and a throttle valve, an upper port pipeline of the compression condenser passes through the compressor and is connected with a side port pipeline of the compression condenser, a lower port pipeline of the compression condenser passes through the throttle valve and is connected with a lower port pipeline of the compression evaporator.
Optionally, the system further comprises a solution circulation loop D, wherein the solution circulation loop D comprises the absorber, the generator, the absorption evaporator, the absorption condenser, a refrigerant pump, a solution pump, the solution heat exchanger, the first spray tray, the second spray tray and the third spray tray; the lower end of the absorption condenser is connected with one end of the refrigerant pump, the other end of the refrigerant pump is connected with the second spraying disc, the lower end of the absorber is connected with the solution outlet and the third spraying disc through pipelines respectively connected with two side ends of the solution heat exchanger, the lower end of the generator is connected with the upper end of the solution heat exchanger through a pipeline, the lower end of the solution heat exchanger is connected with the upper end of the solution pump through a pipeline, and the side end of the solution pump is connected with the first spraying disc through a pipeline.
Optionally, the waste heat exchanger is a water-water dividing wall type heat exchanger or a gas-liquid dividing wall type heat exchanger.
Optionally, the compression condenser is a water-water dividing wall type heat exchanger.
Compared with the prior art, the invention has the following technical effects:
the heating type absorption-compression coupling heat pump waste heat recovery system provided by the invention has the advantages that hot water is supplied to exchange heat with the absorber and the compression condenser, low-temperature heat source water exchanges heat with the waste heat exchanger, low-temperature waste heat above 40 ℃ can be recovered, the exhaust temperature of the waste heat is reduced to below 20 ℃, and hot water above 70 ℃ is supplied; the absorption heat pump unit and the compression heat pump unit in the system are coupled to form a heating type absorption-compression coupling module, high-temperature heat energy output of a low-grade heat source is realized only by using 60% of electric energy of a traditional vapor compression heat pump, low-temperature waste heat deep recovery and energy full utilization are realized, energy consumption is reduced, energy conservation and emission reduction are realized, the waste heat utilization rate is improved, and the practicability is high.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of a waste heat recovery system of a heating absorption-compression coupled heat pump according to the present invention;
wherein the reference numerals are: the system comprises an absorber-1, an absorption evaporator-2, a generator-3, an absorption condenser-4, a solution heat exchanger-5, a refrigerant pump-6, a solution pump-7, a first spray disc-8, a second spray disc-9, a third spray disc-10, a waste heat exchanger-11, a first partition plate-12, a first water-retaining partition plate-13, a second water-retaining partition plate-14, a compression evaporator-15, a compression condenser-16, a throttle valve-17 and a compressor-18.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The first embodiment is as follows:
as shown in fig. 1, the present embodiment provides a waste heat recovery system of a temperature-raising absorption-compression coupled heat pump, which is formed by connecting an absorption heat pump unit and a compression heat pump unit through a pipeline; the absorption heat pump unit comprises an absorber 1, an absorption evaporator 2, a generator 3, an absorption condenser 4, a solution heat exchanger 5, a refrigerant pump 6, a solution pump 7, a first spray disc 8, a second spray disc 9, a third spray disc 10, a waste heat exchanger 11, a first partition plate 12, a first water-retaining partition plate 13 and a second water-retaining partition plate 14; the compression heat pump unit includes a compression evaporator 15, a compression condenser 16, a throttle valve 17, and a compressor 18; the system is divided into four chambers by a first clapboard 12, a first water-retaining clapboard 13 and a second water-retaining clapboard 14, the chambers on the upper side of the first clapboard 12 and the left side of the first water-retaining clapboard 13 are absorbers 1, the chambers on the upper side of the first clapboard 12 and the right side of the first water-retaining clapboard 13 are absorption evaporators 2, the chambers on the lower side of the first clapboard 12 and the left side of the second water-retaining clapboard 14 are generators 3, and the chambers on the lower side of the first clapboard 12 and the right side of the second water-retaining clapboard 14 are absorption condensers 4. The compression evaporator 15 is arranged in the absorption condenser 4 of the absorption heat pump unit and performs coupling heat exchange with the absorption condenser 4 to form a heating type absorption-compression coupling module, and the heat emitted by the absorption condenser 4 is recovered.
In the present embodiment, as shown in fig. 1, the system further includes a hot water supply circulation loop a mainly composed of an absorber 1 and a hot water supply connection pipe inside a compression condenser 16, the hot water supply circulation loop a includes two parallel paths, and the connection manner of each device in the first path is: the hot water inlet pipeline is connected with the left upper port pipeline of the absorber 1 through a point a, the left lower port pipeline of the absorber 1 is connected with the hot water outlet pipeline through b point, and the connection mode of each device in the second passage is as follows: the hot water inlet pipeline is connected with a right upper port pipeline of the compression condenser 16 through a point a, and the right lower port pipeline of the compression condenser 16 is connected with a hot water outlet pipeline through a point b. Based on the structure, the hot water is divided into two parallel passages, one passage flows through the absorber 1, and heat exchange is carried out in the absorber 1 to obtain high-temperature hot water; the other path exchanges heat with the compression condenser 16, absorbs the heat released by the compression heat pump unit condenser, and then is combined with the hot water flowing out of the absorber 1 to flow out of the system.
In this embodiment, as shown in fig. 1, the system further includes a low-temperature heat source water circulation loop B mainly composed of a generator 3, an absorption evaporator 2, and a low-temperature water connection pipe inside the waste heat exchanger 11, and the connection mode of each device in the low-temperature heat source water circulation loop B is as follows: the upper right port pipeline of the waste heat exchanger 11 is connected with the lower left port pipeline of the generator 3, the upper right port pipeline of the generator 3 is connected with the upper left port pipeline of the absorption evaporator 2, and the lower left port pipeline of the absorption evaporator 2 is connected with the lower right port pipeline of the waste heat exchanger 11. The low-temperature heat source exchanges heat with the low-temperature waste heat in the waste heat exchanger 11 to heat up, recovers the heat of the low-temperature waste heat, and then flows into the generator 3 and the absorption evaporator 2 to exchange heat so as to provide heat for the absorption heat pump unit. The generator 3 of the absorption heat pump unit is connected with the low-temperature heat source water loop of the absorption evaporator 2 in series, and the low-temperature heat source water flows through the generator 3, the absorption evaporator 2 and the waste heat exchanger 11 in sequence.
In this embodiment, as shown in fig. 1, the refrigerant connection pipe mainly including the compression evaporator 15, the compression condenser 16, the compressor 18, and the throttle 17 forms a compression heat pump unit refrigerant circulation circuit C, and the connection mode of each device in the compression heat pump unit refrigerant circulation circuit C is as follows: a right end pipeline of the compressor 18 is connected with a left upper port pipeline of the compression condenser 16, a left lower port pipeline of the compression condenser 16 is connected with a right end pipeline of the throttle valve 17, a left end pipeline of the throttle valve 17 is connected with a right lower port pipeline of the compression evaporator 15, and a right upper port pipeline of the compression evaporator 15 is connected with a left end pipeline of the compressor 18. The refrigerant circulation flow of the compression heat pump unit comprises the following steps: gaseous refrigerant in the compressor 18 enters the compression condenser 16 for condensation, condensed liquid refrigerant enters the throttling valve 17 for throttling, throttled liquid refrigerant enters the compression evaporator 15 for evaporation, and gaseous refrigerant generated after evaporation enters the compressor 18 to complete the compression process, so that refrigerant circulation is formed.
In this embodiment, as shown in fig. 1, the system further includes a solution circulation loop D mainly composed of solution connection pipelines of an absorber 1, a generator 3, an absorption evaporator 2, an absorption condenser 4, a refrigerant pump 6, a solution pump 7, a solution heat exchanger 5, a first spray disk 8, a second spray disk 9, and a third spray disk 10, and the connection mode of each device in the solution circulation loop D is as follows: the lower end cryogen outlet of absorption condenser 4 is connected with the upper end pipeline of cryogen pump 6, the right end pipeline of cryogen pump 6 is connected with the right end pipeline of second spray disc 9, the left lower end solution outlet of absorber 1 is connected with the left end pipeline of solution heat exchanger 5, the right end pipeline of solution heat exchanger 5 is connected with the right end pipeline of third spray disc 10, the lower end solution outlet of generator 3 is connected with the upper end pipeline of solution heat exchanger 5, the lower end pipeline of solution heat exchanger 5 is connected with the upper end pipeline of solution pump 7, and the left end pipeline of solution pump 7 is connected with the left end pipeline of first spray disc 8. The solution circulation flow of the absorption heat pump unit comprises the following steps: the dilute solution enters the generator 3 for generation after exchanging heat in the solution heat exchanger 5, and the generated concentrated solution enters the solution heat exchanger 5 for heat exchange and then enters the absorber 1 for absorption. Gaseous refrigerant of the generator 3 enters the absorption condenser 4 for condensation, liquid refrigerant generated after condensation enters the absorption evaporator 2 through the refrigerant pump 6, and the liquid refrigerant enters the absorber 1 for absorption after completing the evaporation process in the absorption evaporator 2 to form refrigerant circulation.
Therefore, the heating type absorption-compression coupling heat pump waste heat recovery system can recover waste heat of more than 40 ℃ and other different types through the coupling of the absorption heat pump unit and the compression heat pump unit and reasonable pipeline arrangement, reduce the temperature of the waste heat to be less than 20 ℃, and simultaneously supply hot water can exchange the hot water to be more than 70 ℃ through heat exchange with the absorber and the compression condenser; the compression heat pump unit recovers and absorbs heat emitted by the condenser side of the heat pump unit, so that when the system recovers equivalent waste heat, the input energy is lower, the deep recovery of the low-temperature waste heat and the full utilization of the energy are realized, the energy consumption is reduced, the energy conservation and emission reduction are realized, the utilization rate of the waste heat is improved, and the practicability is high.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. A heating type absorption-compression coupling heat pump waste heat recovery system is characterized in that: the heat pump system comprises an absorption heat pump unit and a compression heat pump unit connected with the absorption heat pump unit;
the absorption heat pump unit comprises an absorber, an absorption evaporator, a generator, an absorption condenser and a waste heat exchanger, wherein a first spray disc, a second spray disc and a third spray disc are respectively arranged in the absorber and the absorption evaporator, a solution heat exchanger is arranged below the generator, the first spray disc and the third spray disc are both connected with the solution heat exchanger, the second spray disc is connected with the inside of the absorption condenser through a refrigerant pump, and the absorption evaporator and the generator are both connected with the waste heat exchanger; the compression heat pump unit comprises a compression evaporator and a compression condenser connected with the compression evaporator, and the compression evaporator is arranged in the absorption condenser to form a heating type absorption-compression coupling module.
2. The system of claim 1, wherein the system comprises: a first clapboard is arranged in the absorption heat pump unit, the absorber and the absorption evaporator are arranged above the first clapboard, and the generator and the absorption condenser are arranged below the first clapboard; and a first water retaining partition is arranged between the absorber and the absorption evaporator, and a second water retaining partition is arranged between the generator and the absorption condenser.
3. The system of claim 1, wherein the system comprises: the hot water supply device also comprises a hot water supply circulation loop A, wherein the hot water supply circulation loop A comprises a first passage and a second passage connected with the first passage in parallel; the first passage is formed by connecting a hot water supply inlet pipeline, the absorber and a hot water supply outlet pipeline in sequence; the second passage is formed by connecting the hot water supply inlet pipeline, the compression condenser and the hot water supply outlet pipeline in sequence.
4. The system of claim 1, wherein the system comprises: the low-temperature heat source water circulation loop B comprises the generator, the absorption evaporator and the waste heat exchanger, an upper low-temperature water connecting pipe of the waste heat exchanger is connected with a lower port pipeline of the generator, an upper port pipeline of the generator is connected with an upper port pipeline of the absorption evaporator, and a lower port pipeline of the absorption evaporator is connected with a lower low-temperature water connecting pipe of the waste heat exchanger.
5. The system of claim 1, wherein the system comprises: still include compression heat pump unit cryogen circulation circuit C, compression heat pump unit cryogen circulation circuit C includes the compression evaporator compression condenser, compressor and choke valve, the upper portion port pipeline of compression condenser passes through the compressor with compression condenser's lateral part port tube coupling, compression condenser's lower part port pipeline passes through the choke valve with compression evaporator's lower part port tube coupling.
6. The system of claim 1, wherein the system comprises: the system also comprises a solution circulation loop D, wherein the solution circulation loop D comprises the absorber, the generator, the absorption evaporator, the absorption condenser, a refrigerant pump, a solution pump, the solution heat exchanger, the first spray disc, the second spray disc and the third spray disc; the lower end of the absorption condenser is connected with one end of the refrigerant pump, the other end of the refrigerant pump is connected with the second spraying disc, the lower end of the absorber is connected with the solution outlet and the third spraying disc through pipelines respectively connected with two side ends of the solution heat exchanger, the lower end of the generator is connected with the upper end of the solution heat exchanger through a pipeline, the lower end of the solution heat exchanger is connected with the upper end of the solution pump through a pipeline, and the side end of the solution pump is connected with the first spraying disc through a pipeline.
7. The system of claim 1, wherein the system comprises: the waste heat exchanger is a water-water dividing wall type heat exchanger or a gas-liquid dividing wall type heat exchanger.
8. The system of claim 1, wherein the system comprises: the compression condenser is a water-water dividing wall type heat exchanger.
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| CN202010041064.1A CN111156737A (en) | 2020-01-15 | 2020-01-15 | Heating type absorption-compression coupling heat pump waste heat recovery system |
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| CN202010041064.1A CN111156737A (en) | 2020-01-15 | 2020-01-15 | Heating type absorption-compression coupling heat pump waste heat recovery system |
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