CN212339683U - Composite large temperature difference lithium bromide absorption heat pump - Google Patents

Composite large temperature difference lithium bromide absorption heat pump Download PDF

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Publication number
CN212339683U
CN212339683U CN202020897679.XU CN202020897679U CN212339683U CN 212339683 U CN212339683 U CN 212339683U CN 202020897679 U CN202020897679 U CN 202020897679U CN 212339683 U CN212339683 U CN 212339683U
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heat
absorber
evaporator
pipeline
connecting pipeline
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夏茂云
宋述生
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LG Electronics Air Conditioning Shandong Co Ltd
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LG Electronics Air Conditioning Shandong Co Ltd
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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]
    • Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

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Abstract

The utility model relates to a waste heat recovery field, especially combined type lithium bromide absorption heat pump with big temperature difference. Including absorber I, evaporimeter I, generator, condenser, absorber II and evaporimeter II, intercommunication in absorber I and the evaporimeter I, intercommunication in generator and the condenser, intercommunication in absorber II and the evaporimeter II, heat exchange tube interconnect in evaporimeter I and the condenser constitutes closed loop heat source water circulation pipeline, connects through connecting tube I between the heat exchange tube in the heat exchange tube of evaporimeter I and the condenser, and the bottom of evaporimeter I is passed through the pipeline and is connected with the top of evaporimeter I, and the bottom of condenser is passed through electronic tee bend governing valve I and is connected with evaporimeter II and evaporimeter I respectively. The heat pump system can realize independent operation of one type of heat pump and simultaneously operate one type of heat pump and two types of heat pumps, obtain hot water with large temperature difference, reduce initial investment of equipment, improve utilization rate of the equipment and be beneficial to energy conservation and consumption reduction.

Description

Composite large temperature difference lithium bromide absorption heat pump
Technical Field
The utility model relates to a waste heat recovery field, especially combined type lithium bromide absorption heat pump with big temperature difference.
Background
The lithium bromide absorption heat pump is a circulating system which utilizes a low-grade heat source to pump heat from a low-temperature heat source to a high-temperature heat source, is an effective device for recycling low-temperature heat energy, and has double functions of saving energy and protecting the environment. The lithium bromide absorption heat pump units adopted at present are divided into a first type heat pump and a second type heat pump. One type of heat pump, also called heat-increasing heat pump, uses a small amount of high-temperature heat source (such as steam, high-temperature hot water, combustible gas combustion heat, etc.) as a driving heat source to generate a large amount of middle-temperature useful heat energy. Namely, the high-temperature heat energy is used for driving, the heat energy of the low-temperature heat source is increased to the medium temperature, and therefore the utilization efficiency of the heat energy is improved. The coefficient of performance of the first type of absorption heat pump is greater than 1, and is generally 1.5-2.5. The second kind of heat pump is also called as heating heat pump, which utilizes a great deal of medium temperature heat source to generate a small amount of useful heat energy with high temperature. The medium-low temperature heat energy is used for driving, the heat which is less than the medium-temperature heat source but higher than the medium-temperature heat source is prepared by using the heat potential difference of a large amount of medium-temperature heat sources and low-temperature heat sources, and part of the medium-low heat energy is transferred to a higher temperature level, so that the utilization grade of the heat sources is improved. The coefficient of performance of the second absorption heat pump is always less than 1, and is generally 0.4-0.5. The two types of heat pumps have different application purposes and different working modes, but work between three heat sources, the temperature change of the three heat sources can directly influence the heat pump circulation, the temperature rise capacity is increased, and the performance coefficient is reduced.
Heat pumps for waste heat recovery are commonly used in the industry, but it is common in the market to operate a single type of heat pump, as shown in fig. 1; or a separate type two heat pump operation as shown in figure 2. For different hot water quality demands of some industries, for example, a medium temperature quality hot water demand at a certain time, a high temperature quality hot water demand at a certain time, or a situation with a large hot water temperature difference, the existing heat pump cannot meet the requirements at the same time.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the above-mentioned defect that prior art exists, provide a big difference in temperature lithium bromide absorption heat pump of combined type, it both can realize a kind of heat pump of independent operation, also can move a kind of two kinds of heat pumps simultaneously, acquires the hot water of big difference in temperature, reduces equipment initial investment, improve equipment utilization. Is beneficial to energy conservation and consumption reduction of enterprises and countries, can be developed sustainably and has good development prospect.
The technical scheme of the utility model is that: a composite large temperature difference lithium bromide absorption heat pump comprises an absorber I, an evaporator I, a generator, a condenser, an absorber II and an evaporator II, wherein the absorber I is communicated with the evaporator I, the generator is communicated with the condenser, the absorber II is communicated with the evaporator II,
the evaporator I and the heat exchange tubes in the condenser are connected with each other to form a closed-loop heat source water circulation pipeline, the heat exchange tubes in the evaporator I and the condenser are connected through a connecting pipeline I, the bottom of the evaporator I is connected with the top of the evaporator I through a pipeline, and the bottom of the condenser is connected with the evaporator II and the evaporator I through an electric three-way regulating valve I respectively;
the bottom of the absorber I is connected with the top of the generator through a connecting pipeline II, the bottom of the generator is respectively connected with the tops of the absorber I and the absorber II through an electric three-way regulating valve II, one outlet of the electric three-way regulating valve II is connected with the top of the absorber I through a connecting pipeline III, the other outlet of the electric three-way regulating valve II is connected with the top of the absorber II through a connecting pipeline IV, and the bottom of the absorber II is connected with the top of the generator through a connecting pipeline V;
the outlet of the heat exchange tube of the absorber I is connected with the heat exchange tube in the absorber II through a connecting pipeline VI, and the outlet of the heat exchange tube of the generator is connected with the inlet of the heat exchange tube of the evaporator II through a connecting pipeline VII;
the bottom of the evaporator II is connected with the top of the evaporator II through a pipeline;
the connecting pipeline II and the connecting pipeline III are respectively connected with the heat exchanger III and exchange heat through the heat exchanger III; the connecting pipeline IV and the connecting pipeline V are respectively connected with the heat exchanger II and exchange heat through the heat exchanger II; the connecting pipeline VI and the connecting pipeline VII are respectively connected with the heat exchanger I and exchange heat through the heat exchanger I; an outlet of a heat exchange tube of the evaporator II is connected with the outside through a connecting pipeline VIII, and the connecting pipeline VIII and the connecting pipeline I are respectively connected with a hot water heat regenerator and exchange heat through the hot water heat regenerator.
The utility model discloses in, be equipped with cryogen pump I on connecting tube I. The refrigerant pump I provides power to pump refrigerant water in the evaporator I from the bottom to the top.
And a dilute solution pump is arranged on the connecting pipeline II. The dilute solution pump provides power to pump the dilute solution in the absorber I into the generator through the connecting pipeline II.
The bottom of the generator is connected with an inlet of the electric three-way regulating valve II through a pipeline, a concentrated solution pump is arranged on the pipeline and provides power to pump the concentrated solution in the generator into the electric three-way regulating valve II.
The bottom of the condenser is connected with an inlet of the electric three-way regulating valve I through a pipeline, a refrigerant pump II is arranged on the pipeline, and two outlets of the electric three-way regulating valve I are respectively connected with the evaporator II and the evaporator I through pipelines.
And circulating water pumps are arranged on the connecting pipelines I of the heat exchange tubes in the evaporator I and the condenser, so that heat source water circularly flows in the heat exchange tubes in the evaporator I and the condenser.
The outlet of the heat exchange tube of the absorber I1 is connected with an external water supply pipeline through a pipeline, and a valve is arranged on the pipeline.
And a refrigerant pump III is arranged on a connecting pipeline between the top of the evaporator II and the bottom of the evaporator II. And the refrigerant pump III provides power, and refrigerant water in the evaporator II is pumped to the top of the evaporator II and dripped on the heat exchange tube of the evaporator II.
Be equipped with between absorber I and the evaporimeter I and keep off liquid board I, be equipped with between generator and the condenser and keep off liquid board II, be equipped with between absorber II and the evaporimeter II and keep off liquid board III.
The utility model has the advantages that:
based on the principle of lithium bromide absorption type first-class heat pumps and second-class heat pumps, the first-class heat pumps and the second-class heat pumps are effectively combined, so that the first-class heat pumps can be operated independently, and the first-class second-class heat pumps can be operated simultaneously to realize multiple modes of large-temperature-difference hot water and the like. In the actual use process, one type of heat pump mode can be independently operated according to different hot water temperature requirements of users to prepare medium-temperature hot water; the large temperature difference mode can be operated simultaneously, the temperature of hot water is greatly improved to prepare high-temperature hot water, the utilization rate of equipment is improved, energy waste and environmental heat pollution are reduced, and the purposes of energy conservation, consumption reduction and emission reduction are achieved.
Drawings
FIG. 1 is a schematic flow diagram of a lithium bromide absorption type heat pump cycle;
fig. 2 is a schematic flow chart of the cycle principle of a lithium bromide absorption type second-class heat pump.
Fig. 3 is a schematic view of the circulation principle of the present invention.
In the figure: 1, an absorber I; 2, an evaporator I; 3, a generator; 4, a condenser; 5, an absorber II; 6, an evaporator II; 7, a heat exchanger I; 8, a heat exchanger II; 9 heat exchanger III; 10 hot water heat regenerator; 11 a dilute solution pump; 12 a refrigerant pump I; 13 a concentrated solution pump; 14 a refrigerant pump II; 15 refrigerant pump III; 16 circulating water pump; 17 electric three-way regulating valve II; 18 electric three-way regulating valve I; 19 a liquid baffle I; 20 liquid baffle II; 21 liquid baffle III; 22 connecting the pipeline I; 23 connecting a pipeline II; 24 connecting a pipeline III; 25 connecting a pipeline IV; 26 connecting the pipeline V; 27 is connected with a pipeline VI; 28, connecting a pipeline VII; 29 connecting pipeline VIII; and (6) 30 valves.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings.
In the following description, specific details are set forth in order to provide a thorough understanding of the present invention. The invention can be implemented in a number of other ways than those described herein, and those skilled in the art will be able to make similar generalizations without departing from the spirit of the invention. The invention is therefore not limited to the specific embodiments disclosed below.
As shown in figure 3, combined type large temperature difference lithium bromide absorption heat pump comprises absorber I1, evaporator I2, generator 3, condenser 4, absorber II 5 and evaporator II 6, the absorber I1 and evaporator I2 are communicated with each other, the generator 3 and condenser 4 are communicated with each other, and the absorber II 5 and evaporator II 6 are communicated with each other. In order to prevent liquid drops from causing corrosion, refrigerant pollution or heat loss along with the flow of refrigerant steam, a liquid baffle plate I19 is arranged between the absorber I1 and the evaporator I2, a liquid baffle plate II 20 is arranged between the generator 3 and the condenser 4, and a liquid baffle plate III 21 is arranged between the absorber II 5 and the evaporator II 6. The heat exchange tubes in the evaporator I2 and the condenser 4 are connected with each other to form a closed-loop heat source water circulation pipeline. And a circulating water pump 16 is arranged on a connecting pipeline I22 of the heat exchange pipe in the evaporator I2 and the heat exchange pipe in the condenser 4, so that heat source water circularly flows in the heat exchange pipes in the evaporator I2 and the condenser 4. The bottom of condenser 4 is connected with evaporimeter II 6 and evaporimeter I2 respectively through electronic three-way control valve I18, and wherein the bottom of condenser 4 is connected with the entry of electronic three-way control valve I18 through the pipeline, and is equipped with refrigerant pump II 14 on this pipeline, and refrigerant pump II 14 provides power, takes out the cryogen water in condenser 4 to in electronic three-way control valve I18. Two exports of electronic three way control valve I18 are connected with evaporimeter II 6 and evaporimeter I2 respectively through the pipeline, the utility model discloses in, can make I18 automatic flow distribution of electronic three way control valve through the procedure, with the cryogen water that condenses the production in the condenser 4 in the I18 distribution of electronic three way control valve flows to in evaporimeter II 6 and/or evaporimeter I2.
The bottom of evaporimeter I2 is passed through the pipeline and is connected with the top of evaporimeter I2, is equipped with cryogen pump I12 on its connecting line, and cryogen pump I12 provides power, takes out the cryogen water in evaporimeter I2 to the top of evaporimeter I2 to drip and drench on the heat exchange tube of evaporimeter I2.
The refrigerant water that drips on the heat exchange tube of evaporimeter I2 absorbs the heat evaporation of heat source water in the heat exchange tube, and refrigerant water evaporates into cryogen steam, gets into in the absorber I1, is dripped and drenched the concentrated solution absorption on the heat exchange tube of absorber I1, and the concentrated solution on the heat exchange tube becomes rare solution, and the concentrated solution becomes the in-process release heat of rare solution, and the circulation hot water heat absorption in the heat exchange tube of absorber I1 this moment.
The bottom of absorber I1 is connected with the top of generator 3 through connecting line II 23, is equipped with weak solution pump 11 on connecting line II 23, and weak solution pump 11 provides power, takes out the weak solution in the absorber I1 to the generator 3 in through connecting line II 23.
The bottom of generator 3 is connected with I1 of absorber and II 5 of absorber respectively through electronic three-way control valve II 17, and wherein the bottom of generator 3 is connected with the entry of electronic three-way control valve II 17 through the pipeline, and is equipped with concentrated solution pump 13 on this pipeline, and concentrated solution pump 13 provides power, takes out the concentrated solution in the generator 3 to in the electronic three-way control valve II 17. Two outlets of the electric three-way regulating valve II 17 are respectively connected with the absorber I1 and the absorber II 5 through pipelines: one outlet of the electric three-way regulating valve II 17 is connected with the top of the absorber I1 through a connecting pipeline III 24, and the other outlet of the electric three-way regulating valve II 17 is connected with the top of the absorber II 5 through a connecting pipeline IV 25. The utility model discloses in, can make II 17 of electronic three way control valves automatically carry out flow distribution through the procedure, with the concentrated solution that produces in the generator 3 in I1 of absorber and/or II 5 of absorber of electronic three way control valve II 17 distribution flow. The bottom of the absorber II 5 is connected to the generator 3 via a connecting line V26.
The connecting pipeline II 23 and the connecting pipeline III 24 are respectively connected with the heat exchanger III 9 and exchange heat through the heat exchanger III 9; and the connecting pipeline IV 25 and the connecting pipeline V26 are respectively connected with the heat exchanger II 8 and exchange heat through the heat exchanger II 8.
Hot water is introduced into the heat exchange tube of the absorber I1 through the heat exchange tube inlet of the absorber I1, the heat exchange tube outlet of the absorber I1 is connected with the heat exchange tube in the absorber II 5 through the connecting pipeline VI 27, meanwhile, the outlet of the heat exchange tube of the absorber I1 is also connected with an external water supply pipeline through a pipeline, and a valve 30 is arranged on the pipeline. When the valve 30 is opened, hot water in the heat exchange tube of the absorber I1 directly flows to an external water supply pipeline; when the valve 30 is closed, hot water in the heat exchange tube of the absorber I1 flows into the heat exchange tube of the absorber II 5 through the connecting pipeline VI 27.
A heat source is introduced into the heat exchange tube of the generator 3 through the heat exchange tube inlet of the generator 3, and the heat exchange tube outlet of the generator 3 is connected with the heat exchange tube inlet of the evaporator II 6 through the connecting tube VII 28. The connecting pipeline VI 27 and the connecting pipeline VII 28 are respectively connected with the heat exchanger I7 and exchange heat through the heat exchanger I7.
An outlet of a heat exchange tube of the evaporator II 6 is connected with the outside through a connecting pipeline VIII 29, the connecting pipeline VIII 29 and the connecting pipeline I22 are respectively connected with the hot water heat regenerator 10, and heat exchange is carried out through the hot water heat regenerator 10. And a heat source flowing out of the evaporator II 6 passes through the hot water heat regenerator 10 to exchange heat with circulating heat source water from the condenser 4, the temperature of the heat source is reduced, and the circulating heat source water enters the heat exchange pipe of the evaporator I2 after the temperature of the circulating heat source water is increased to release heat.
The bottom of the evaporator II 6 is connected with the top of the evaporator II 6 through a pipeline, a refrigerant pump III 15 is arranged on the connecting pipeline, the refrigerant pump III 15 provides power, refrigerant water in the evaporator II 6 is pumped to the top of the evaporator II 6, and the refrigerant water is dripped onto the heat exchange tube of the evaporator II 6.
The mode of operation of one type of heat pump alone with the heat pump is as follows. Heat source water flows in a heat exchange pipe of the evaporator I2, the electric three-way regulating valve I18 automatically performs flow distribution through a program, all refrigerant water obtained by condensation in the condenser 4 flows into the evaporator I2, the refrigerant water flowing into the evaporator I2 is conveyed to the top of the evaporator I2 through the refrigerant pump I12 and drips on the heat exchange pipe of the evaporator I2, and the refrigerant water absorbs heat of the heat source water in the heat exchange pipe to evaporate. Refrigerant water is evaporated into refrigerant steam, the refrigerant steam enters the absorber I1 and is absorbed by concentrated solution dripped on the heat exchange tube of the absorber I1, the concentrated solution absorbs the refrigerant steam to become dilute solution, heat is released in the absorption process, and hot water circulating in the heat exchange tube of the absorber I1 absorbs heat and the temperature is increased.
The dilute solution that produces in the absorber I1 is sent to in the generator 3 through connecting line II 23 by dilute solution pump 11, the concentrated solution that produces in the generator 3, through the procedure with the automatic flow distribution that carries out of electronic three way control valve II 18, concentrated solution pump 13 sends all concentrated solutions in the generator 3 to in the absorber I1 through connecting line III 24, the dilute solution in connecting line II 23 and the concentrated solution in connecting line III 24 heat transfer in heat exchanger III 9, the temperature of concentrated solution transmits to dilute solution, thereby make the temperature rise of the dilute solution who flows into generator 3, the temperature of the concentrated solution that flows into absorber I1 reduces.
The dilute solution is conveyed to the top of the generator 3 by the dilute solution pump 11 and is dripped on the heat exchange tube of the generator 3, the dilute solution absorbs the heat of the heat source in the heat exchange tube of the generator 3 to generate refrigerant steam, and meanwhile, the dilute solution is concentrated into a concentration solution. The refrigerant vapor flows into the condenser 4, condenses into water by heat release in the condenser 4 and releases heat, and the released heat is absorbed and taken away by the circulating heat source water in the condenser 4. The concentrated solution flowing out of the generator 3 is conveyed to the top of the absorber I1 and is dripped on the heat exchange tube of the absorber I1, and the concentrated solution absorbs the refrigerant steam from the evaporator I2 to become a dilute solution, so that the solution circulation in the heating process is completed.
After the hot water flowing into the heat exchange tube of the absorber I1 is heated, the temperature of the hot water rises. When the valve 30 is open, heated hot water can flow directly from the outlet of the heat exchange tubes of the absorber I1. When the valve 30 is in a closed state, when the hot water heated in the absorber I1 flows to the heat exchanger I7 through the connecting pipeline VI 27, the hot water exchanges heat with the heat source from the generator 3 again, the heat absorption temperature of the hot water is increased, and the hot water flows into the heat exchange pipe of the absorber II 5 and flows out. The heat source in the generator 3 is subjected to heat exchange through the heat exchanger I7, the temperature is reduced, the heat source flows to the hot water heat regenerator 10 through the heat exchange tube of the evaporator II 6 and the connecting pipeline VIII 29, the heat exchange is carried out with the circulating heat source water of the heat exchange tube of the condenser 4, the heat release temperature of the heat source is reduced, and the heat absorption temperature of the circulating heat source water is increased. After the temperature of the circulating heat source water rises, the circulating heat source water enters a heat exchange tube in the evaporator I2 to release heat. The heating process of independently operating one type of heat pump is completed through the above steps, and the hot water with medium temperature quality is prepared.
The mode of operation for operating both the first type heat pump and the second type heat pump with the heat pump is as follows. After the heat source from the generator 3 and the hot water from the absorber I1 are subjected to heat exchange through the heat exchanger I7, the heat source with the reduced temperature flows into the heat exchange pipe of the evaporator II 6. The electric three-way regulating valve I18 automatically performs flow distribution through a program, a part of refrigerant water obtained by condensing the condenser 4 flows into the evaporator II 6, the refrigerant water in the evaporator II 6 is powered by the refrigerant pump I15 and drips on the heat exchange tube of the evaporator II 6 to absorb the heat of the heat source in the tube, and the refrigerant water is evaporated into refrigerant steam. Refrigerant steam enters the absorber II 5 and is absorbed by the concentrated solution dripped on the heat exchange tube of the absorber II 5, the concentrated solution is changed into dilute solution and releases heat, and hot water in the heat exchange tube of the absorber II 5 absorbs heat.
And after the dilute solution flowing out of the absorber II 5 and the concentrated solution flowing out of the generator 3 are subjected to heat exchange through the heat exchanger II 8, the heat absorption temperature of the dilute solution is increased, and the heat release temperature of the concentrated solution is reduced. The dilute solution is conveyed to the top of the generator 3, the dilute solution is heated by a heat source in the generator tube 3, the refrigerant water absorbs heat to generate refrigerant steam, the dilute solution is concentrated into concentrated solution, the refrigerant steam flows into the condenser 4, the refrigerant steam is released and condensed into refrigerant water in the condenser 4, and the released heat is absorbed and taken away by the circulating heat source water. The electric three-way regulating valve II 17 automatically performs flow distribution through a program, a part of concentrated solution generated by the generator 3 is subjected to heat exchange and cooling through the heat exchanger II 8 through the concentrated solution pump 13, flows into the top of the absorber II 5, is dripped on the heat exchange tube of the absorber II 5, and absorbs refrigerant vapor from the evaporator II 6, so that the concentrated solution becomes dilute solution and releases heat, and hot water in the heat exchange tube of the absorber II 5 absorbs heat, and the temperature is increased.
Heat source water flows in a heat exchange pipe of the evaporator I2, the electric three-way regulating valve I18 automatically performs flow distribution through a program, and the other part of refrigerant water obtained by condensing 4 in the condenser enters the evaporator I2 through the connecting pipeline I22. The refrigerant water flowing into the evaporator I2 is conveyed to the top of the evaporator I2 through a refrigerant pump I12 and is dripped onto the heat exchange tubes of the evaporator I2, and the refrigerant water absorbs the heat of the heat source water in the heat exchange tubes for evaporation. Refrigerant water is evaporated into refrigerant steam, the refrigerant steam enters the absorber I1 and is absorbed by concentrated solution dripped on the heat exchange tube of the absorber I1, the concentrated solution absorbs the refrigerant steam to become dilute solution, heat is released in the absorption process, and hot water circulating in the heat exchange tube of the absorber I1 absorbs heat and the temperature is increased.
The dilute solution that produces in the absorber I1 is sent to in the generator 3 through connecting line II 23 by dilute solution pump 11, the concentrated solution that produces in the generator 3, through the procedure with the automatic flow distribution that carries out of electronic three way control valve II 18, concentrated solution pump 13 sends the other part concentrated solution in the generator 3 to in the absorber I1 through connecting line III 24, the dilute solution in connecting line II 23 and the concentrated solution in connecting line III 24 heat transfer in heat exchanger III 9, the temperature transfer of concentrated solution is to dilute solution, thereby make the temperature rise of the dilute solution that flows into generator 3, the temperature reduction of the concentrated solution that flows into absorber I1.
The dilute solution in the absorber I1 is conveyed to the top of the generator 3 by the dilute solution pump 11, meanwhile, the dilute solution flowing out of the absorber II 5 also flows to the top of the generator 3 after being subjected to heat exchange through the heat exchanger II 8 and is dripped on the heat exchange tube of the generator 3, the dilute solution absorbs heat of a heat source in the heat exchange tube of the generator 3 to generate refrigerant steam, and meanwhile, the dilute solution is concentrated into a concentrated solution. The refrigerant vapor flows into the condenser 4, condenses into water by heat release in the condenser 4 and releases heat, and the released heat is absorbed and taken away by the circulating heat source water in the condenser 4. The electric three-way regulating valve II 17 automatically performs flow distribution through a program, and the other part of concentrated solution in the generator 3 is transferred to the top of the absorber I1 after heat exchange through the heat exchanger III 9 and is dripped on the heat exchange tube of the absorber I1, and the concentrated solution absorbs refrigerant steam from the evaporator I2 to become dilute solution, so that solution circulation in the heating process is completed.
After the hot water flowing into the heat exchange tube of the absorber I1 is heated, the temperature of the hot water rises. When the hot water heated in the absorber I1 flows to the heat exchanger I7 through the connecting pipeline VI 27, after heat exchange is carried out again with the heat source from the generator 3, the hot water absorbs heat again, the temperature rises, the hot water flows into the heat exchange pipe of the absorber II 5, the temperature rises again, and the hot water flows out. The temperature of a heat source in the generator 3 is reduced after heat exchange through the heat exchanger I7, the heat is released again through the evaporator II 6 and is cooled, the heat flows to the hot water heat regenerator 10, the heat exchange is carried out with the circulating heat source water of the heat exchange tube of the condenser 4, the heat released again by the heat source is reduced, and the heat absorption temperature of the circulating heat source water is increased. After the temperature of the circulating heat source water rises, the circulating heat source water enters a heat exchange tube in the evaporator I2 to release heat. The heating process of simultaneously operating the first-class heat pump and the second-class heat pump is completed, and the hot water with large temperature difference and high temperature quality is prepared.
The above is to the utility model provides a combined type big difference in temperature lithium bromide absorption heat pump has carried out the detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims. The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. The utility model provides a big difference in temperature lithium bromide absorption heat pump of combined type, includes I (1) of absorber, evaporimeter I (2), generator (3), condenser (4), II (5) of absorber and evaporimeter II (6), communicates in I (1) of absorber and the I (2) of evaporimeter, communicates in generator (3) and condenser (4), communicates in II (5) of absorber and the II (6) of evaporimeter, its characterized in that:
the heat exchange tubes in the evaporator I (2) and the condenser (4) are connected with each other to form a closed-loop heat source water circulation pipeline, the heat exchange tubes in the evaporator I (2) and the condenser (4) are connected through a connecting pipeline I (22), the bottom of the evaporator I (2) is connected with the top of the evaporator I (2) through a pipeline, and the bottom of the condenser (4) is respectively connected with the evaporator II (6) and the evaporator I (2) through an electric three-way regulating valve I (18);
the bottom of the absorber I (1) is connected with the top of the generator (3) through a connecting pipeline II (23), the bottom of the generator (3) is respectively connected with the tops of the absorber I (1) and the absorber II (5) through an electric three-way regulating valve II (17), one outlet of the electric three-way regulating valve II (17) is connected with the top of the absorber I (1) through a connecting pipeline III (24), the other outlet of the electric three-way regulating valve II (17) is connected with the top of the absorber II (5) through a connecting pipeline IV (25), and the bottom of the absorber II (5) is connected with the top of the generator (3) through a connecting pipeline V (26);
the outlet of a heat exchange tube of the absorber I (1) is connected with a heat exchange tube in the absorber II (5) through a connecting pipeline VI (27), and the outlet of the heat exchange tube of the generator (3) is connected with the inlet of a heat exchange tube of the evaporator II (6) through a connecting pipeline VII (28);
the bottom of the evaporator II (6) is connected with the top of the evaporator II (6) through a pipeline;
the connecting pipeline II (23) and the connecting pipeline III (24) are respectively connected with the heat exchanger III (9) and exchange heat through the heat exchanger III (9); the connecting pipeline IV (25) and the connecting pipeline V (26) are respectively connected with the heat exchanger II (8) and exchange heat through the heat exchanger II (8); the connecting pipeline VI (27) and the connecting pipeline VII (28) are respectively connected with the heat exchanger I (7) and exchange heat through the heat exchanger I (7); an outlet of a heat exchange tube of the evaporator II (6) is connected with the outside through a connecting pipeline VIII (29), the connecting pipeline VIII (29) and the connecting pipeline I (22) are respectively connected with a hot water heat regenerator (10), and heat is exchanged through the hot water heat regenerator (10).
2. The compound large temperature difference lithium bromide absorption heat pump according to claim 1, characterized in that: and a refrigerant pump I (12) is arranged on the connecting pipeline I (22).
3. The compound large temperature difference lithium bromide absorption heat pump according to claim 1, characterized in that: and a dilute solution pump (11) is arranged on the connecting pipeline II (23).
4. The compound large temperature difference lithium bromide absorption heat pump according to claim 1, characterized in that: the bottom of the generator (3) is connected with an inlet of an electric three-way regulating valve II (17) through a pipeline, and a concentrated solution pump (13) is arranged on the pipeline.
5. The compound large temperature difference lithium bromide absorption heat pump according to claim 1, characterized in that: the bottom of the condenser (4) is connected with an inlet of the electric three-way regulating valve I (18) through a pipeline, a refrigerant pump II (14) is arranged on the pipeline, and two outlets of the electric three-way regulating valve I (18) are respectively connected with the evaporator II (6) and the evaporator I (2) through pipelines.
6. The compound large temperature difference lithium bromide absorption heat pump according to claim 1, characterized in that: and a circulating water pump (16) is arranged on a connecting pipeline I (22) of the heat exchange tube of the evaporator I (2) and the heat exchange tube in the condenser (4).
7. The compound large temperature difference lithium bromide absorption heat pump according to claim 1, characterized in that: the outlet of the heat exchange tube of the absorber I (1) is connected with an external water supply pipeline through a pipeline, and a valve (30) is arranged on the pipeline.
8. The compound large temperature difference lithium bromide absorption heat pump according to claim 1, characterized in that: and a refrigerant pump III (15) is arranged on a connecting pipeline between the top of the evaporator II and the bottom of the evaporator II.
9. The compound large temperature difference lithium bromide absorption heat pump according to claim 1, characterized in that: be equipped with between absorber I (1) and evaporimeter I (2) and keep off liquid board I (19), be equipped with between generator (3) and condenser (4) and keep off liquid board II (20), be equipped with between absorber II (5) and evaporimeter II (6) and keep off liquid board III (21).
CN202020897679.XU 2020-05-26 2020-05-26 Composite large temperature difference lithium bromide absorption heat pump Active CN212339683U (en)

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Application Number Priority Date Filing Date Title
CN202020897679.XU CN212339683U (en) 2020-05-26 2020-05-26 Composite large temperature difference lithium bromide absorption heat pump

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CN212339683U true CN212339683U (en) 2021-01-12

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