CN116265836A - Solution heat accumulating type cold and hot water system and refrigerating and heating method thereof - Google Patents
Solution heat accumulating type cold and hot water system and refrigerating and heating method thereof Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 132
- 238000010438 heat treatment Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000002918 waste heat Substances 0.000 claims abstract description 94
- 239000006096 absorbing agent Substances 0.000 claims abstract description 40
- 238000003860 storage Methods 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 238000009835 boiling Methods 0.000 claims abstract description 10
- 238000005057 refrigeration Methods 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims description 12
- 238000005507 spraying Methods 0.000 claims description 12
- 230000002528 anti-freeze Effects 0.000 claims description 7
- 230000006837 decompression Effects 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 5
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 5
- 229910052753 mercury Inorganic materials 0.000 claims description 5
- 238000005192 partition Methods 0.000 claims description 2
- 230000001174 ascending effect Effects 0.000 claims 2
- 230000001276 controlling effect Effects 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 239000003795 chemical substances by application Substances 0.000 abstract description 3
- 238000001704 evaporation Methods 0.000 abstract description 3
- 238000004321 preservation Methods 0.000 abstract description 3
- 230000002745 absorbent Effects 0.000 abstract description 2
- 239000002250 absorbent Substances 0.000 abstract description 2
- 230000007935 neutral effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 238000005338 heat storage Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/02—Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
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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
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
- F25B29/006—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the sorption type system
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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
- F25B33/00—Boilers; Analysers; Rectifiers
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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
- F25B37/00—Absorbers; Adsorbers
-
- 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
- F25B39/00—Evaporators; Condensers
- F25B39/04—Condensers
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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
- F25B40/00—Subcoolers, desuperheaters or superheaters
- F25B40/06—Superheaters
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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
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/04—Arrangement or mounting of control or safety devices for sorption type machines, plants or systems
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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Abstract
The invention discloses a solution heat accumulating type cold and hot water system and a refrigerating and heating method thereof, which take heat energy generated by a low-temperature heat source as a driving heat source, take neutral solution with strong hygroscopicity as an absorbent, take water as an evaporating agent, and take the characteristic that water boils at a low boiling point in a low-pressure vacuum state to extract heat in a low-grade waste heat source, and prepare technical hot water, heating hot water or use for refrigeration through recovery and conversion. The absorber is provided with a liquid storage area, so that the system is guaranteed to have abundant solution storage capacity, the system can store a part of concentrated solution when waste heat sources are abundant, and the absorber has a heat preservation effect due to the integrated design of the storage area and the absorber, part of concentrated solution can be taken to enter the system for circulation when the waste heat sources are fewer, circulation quantity and circulation concentration are increased, waste heat can be better absorbed, and therefore the system can stably run under the condition of fluctuation of waste heat source load, and stable heating and refrigerating requirements of a user side are met.
Description
Technical Field
The invention relates to the field of energy conservation, in particular to a solution heat accumulating type cold and hot water system and a refrigerating and heating method thereof.
Background
In daily life and industrial production, a large amount of low-temperature heat sources are generated, the temperature of the heat sources is usually lower than 200 ℃, the low-temperature heat sources comprise flue gas, low-pressure steam and hot water, the waste of the low-temperature heat sources in China is serious, and the phenomenon of low or even zero utilization rate of low-temperature waste heat exists widely in the traditional energy utilization large households. The research on the theory and technology of energy conversion in the temperature region of 60-150 ℃ is relatively weak, and the waste heat emission in the temperature region is very large, so that the waste heat cannot be utilized efficiently, and only the waste heat can be discharged to the atmosphere, so that the waste heat is wasted.
The traditional absorption heat pump can recycle the geothermal heat source; however, in view of large waste heat of industrial enterprises and low quality, the traditional absorption heat pump has high requirements on heat source quality, has no heating and refrigerating functions, and is difficult to fully recover the heat of low-temperature residual heat sources, so that the utilization rate of the industrial waste heat is low; in addition, the generation of low temperature heat sources is fluctuating, which can cause instability in the operation of the absorption heat pump.
Disclosure of Invention
In order to solve the technical problems, the invention provides a solution heat accumulating type cold and hot water system and a refrigerating and heating method thereof, comprising the following steps: a generator, a low temperature heat source is connected to the generator, and the dilute solution in the generator is heated; the low-temperature heat source flows from the generator to the shell-and-tube heat collector, and waste heat is transmitted to the heat exchange separator in the shell-and-tube heat collector and then is discharged out of the unit; boiling the diluted solution after heating to generate high-temperature concentrated solution and steam; a condenser for absorbing heat of the steam to form condensed water; in a heating mode, the condensed water flows to the heat exchange separator, absorbs waste heat and is vaporized into first waste heat steam, and then enters the absorber; in a refrigeration mode, the condensed water enters an evaporator to absorb heat and evaporate into second waste heat steam, and then flows to the absorber; a regenerator for cooling the Gao Wennong solution and preheating the dilute solution; the absorber is provided with a sprayer for spraying hot water or circulating water by using the cooled Gao Wennong solution, the hot water or the circulating water flows to the condenser after being sprayed and heated, and the heat of the steam is absorbed in the condenser and flows out. An adjusting component is further arranged in the absorber, the Gao Wennong solution is stored under the condition that the first waste heat steam or the second waste heat steam is rich, and the Gao Wennong solution stored is conveyed to the sprayer under the condition that the first waste heat steam or the second waste heat steam is less; chilled water is arranged in the evaporator, and the chilled water absorbs heat by the condensed water.
Preferably: the adjusting component comprises a liquid storage area for storing the Gao Wennong solution, and the liquid storage area is blocked from the sprayer through a partition plate.
Preferably: a descending pipe and a rising pipe are connected between the liquid storage area and the high-temperature concentrated solution, a first switching valve is arranged on the descending pipe, mercury and a second switching valve are arranged on the rising pipe, the first switching valve is opened under the condition that the first waste heat steam or the second waste heat steam is rich, the second switching valve is closed, and the Gao Wennong solution enters the liquid storage area for storage through the descending pipe; and under the condition that the first waste heat steam or the second waste heat steam is less, the first switching valve is closed, the second switching valve is opened, and the mercury conveys the Gao Wennong solution in the liquid storage area to the sprayer for spraying.
Preferably: and a pressure reducing valve is arranged on an outlet of the condenser and used for reducing the condensed water.
Preferably: the system also comprises a low-temperature heat source pipeline, a hot water or circulating water pipeline, a steam pipeline, a chilled water pipeline, a solution pipeline, a condensed water pipeline and an antifreezing fluid pipeline, wherein the antifreezing fluid pipeline is connected with the shell-and-tube heat collector and the heat exchange separator.
Preferably: and the valve is used for controlling the flow directions of the concentrated solution, the dilute solution, the condensed water and the steam.
The invention also provides a heating method of the solution heat accumulating type cold and hot water system, the method is suitable for any one of the systems in the technical scheme, and the method comprises the following steps:
s1, enabling a low-temperature heat source to enter a generator, and heating a dilute solution;
s2, boiling the diluted solution after heating to generate high-temperature concentrated solution and steam, wherein the Gao Wennong solution enters a heat regenerator for cooling, and the steam enters a condenser;
s3, enabling the cooled high-temperature concentrated solution to enter an absorber, spraying heated hot water or circulating water, enabling the heated hot water or circulating water to enter a condenser, absorbing heat of steam, and enabling the steam to release heat and condense to form condensed water.
Preferably: the heating method further comprises the following steps:
s4, the low-temperature heat source flows from the generator to the shell-and-tube heat collector, and waste heat is transferred to the heat exchange separator through antifreeze fluid;
s5, the condensed water is decompressed by a decompression valve and enters the heat exchange separator to absorb waste heat and then is vaporized into first waste heat steam;
s6, enabling the first waste heat steam to enter an absorber, and heating the Gao Wennong solution;
and S7, adjusting the adjusting component in the absorber according to the amount of the first waste heat steam, storing the Gao Wennong solution under the condition that the first waste heat steam is rich, and conveying the stored Gao Wennong solution to the sprayer under the condition that the first waste heat steam is less.
The invention also provides a heating method of the solution heat accumulating type cold and hot water system, the method is suitable for any one of the systems in the technical scheme, and the method comprises the following steps:
l1, a low-temperature heat source enters a generator to heat a dilute solution;
l2, boiling the diluted solution after heating to generate high-temperature concentrated solution and steam, wherein the Gao Wennong solution enters a heat regenerator for cooling, and the steam enters a condenser;
l3, enabling the cooled high-temperature concentrated solution to enter an absorber, spraying heated hot water or circulating water, enabling the heated hot water or circulating water to enter a condenser, absorbing heat of steam, and enabling the steam to release heat and condense to form condensed water;
and L4, the condensed water is decompressed by a decompression valve and then enters an evaporator, and the heat of the chilled water in the evaporator is absorbed and then is vaporized into second waste heat steam.
Preferably: the refrigeration method further comprises the following steps: l5, enabling the second waste heat steam to enter an absorber, and heating the Gao Wennong solution;
l6, adjusting an adjusting component in the absorber according to the amount of the second waste heat steam, storing the Gao Wennong solution under the condition that the second waste heat steam is rich, and conveying the Gao Wennong solution stored to the sprayer under the condition that the second waste heat steam is less;
l7, enabling the low-temperature heat source to flow from the generator to a shell-and-tube type heat collector, enabling the dilute solution to flow from the heat regenerator to the heat exchange separator, and enabling the dilute solution to flow from the heat exchange separator to the shell-and-tube type heat collector, and heating the dilute solution in the shell-and-tube type heat collector through waste heat of the low-temperature heat source to form high-temperature concentrated solution and steam;
and L8, flowing the high-temperature concentrated solution formed in the step L7 to the generator, and enabling the steam formed in the step L7 to enter the condenser.
The invention has the technical effects and advantages that:
the solution heat accumulating type waste heat recovery technology is coupled with enterprise heating and refrigeration, the two processes of solution concentration and smoke heat absorption are separated by utilizing the characteristic that the vaporization latent heat in smoke can be better absorbed after the solution concentration, and the system can run throughout the year by adopting two running modes of heating hot water production and refrigerating, so that the smoke waste heat is fully recovered; the heat exchange separator is matched with the shell-and-tube type heat collector, and plays a role of an evaporator of a conventional pump closing system in a heating mode, and plays a role of a generator of the conventional pump closing system in a cooling mode; the absorber is provided with a liquid storage area, so that the system is guaranteed to have abundant solution storage capacity, the system can store a part of concentrated solution when waste heat sources are abundant, and the absorber has a heat preservation effect due to the integrated design of the storage area and the absorber, part of concentrated solution can be taken to enter the system for circulation when the waste heat sources are fewer, circulation quantity and circulation concentration are increased, waste heat can be better absorbed, and therefore the system can stably run under the condition of fluctuation of waste heat source load, and stable heating and refrigerating requirements of a user side are met.
Drawings
Fig. 1 is a schematic diagram of a solution heat accumulating type hot and cold water system provided in an embodiment of the present application;
FIG. 2 is a schematic diagram of a heat-generating process of a solution heat-accumulating type cold-hot water system according to an embodiment of the present application;
fig. 3 is a schematic diagram of a refrigeration flow of a solution heat storage type cold and hot water system according to an embodiment of the present application;
fig. 4 is a schematic diagram of an internal structure of an absorber in a solution heat accumulating type hot and cold water system according to an embodiment of the present application;
fig. 5 is a schematic diagram of a heating method of a solution heat accumulating type hot and cold water system according to an embodiment of the present application;
fig. 6 is a schematic diagram of a refrigerating method of a solution heat accumulating type hot and cold water system according to an embodiment of the present application.
Detailed Description
The invention will be described in further detail with reference to the drawings and the detailed description. The embodiments of the invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Referring to fig. 1-4, in this embodiment, a solution heat accumulating type cold and hot water system is provided, wherein heat energy generated by a low temperature heat source is used as a driving heat source, neutral solution with strong hygroscopicity is used as an absorbent, water is used as an evaporating agent, heat in low grade waste heat sources is extracted by utilizing the characteristic that water boils at a low boiling point in a low pressure vacuum state, and technical hot water, heating hot water or refrigeration is prepared by recovery and conversion, and the solution heat accumulating type cold and hot water system comprises a low temperature heat source pipeline, a hot water or circulating water pipeline, a steam pipeline, a chilled water pipeline, a solution pipeline, a condensed water pipeline and an antifreezing solution pipeline, wherein the antifreezing solution pipeline is connected with a shell type heat collector and a heat exchange separator.
The low-temperature heat source pipeline is connected with the generator and the shell-and-tube type heat collector, the low-temperature heat source is connected with the generator through the low-temperature heat source pipeline, the dilute solution in the generator is heated and then flows to the shell-and-tube type heat collector, waste heat is transmitted to the heat exchange separator through antifreeze in the shell-and-tube type heat collector and then is discharged out of the unit, the dilute solution in the generator is heated and then boiled to generate high-temperature concentrated solution and steam, and the waste heat can prevent the antifreeze and the damage under the condition of lower air temperature.
The hot water or circulating water pipeline is connected with the absorber and the condenser, the hot water or circulating water is heated by the high-temperature concentrated solution in the absorber, the heat of the steam is absorbed in the condenser and flows out, the steam is absorbed by the heat to form condensed water, and then the condensed water is decompressed through the decompression valve at the outlet of the condenser and flows to the evaporator or the heat exchange separator; in the embodiment, in the heating mode, condensed water flows to a heat exchange separator, absorbs waste heat to be vaporized into first waste heat steam, then enters an absorber, in the cooling mode, condensed water enters an evaporator to absorb heat to be vaporized into second waste heat steam, then flows to the absorber, chilled water is arranged in the evaporator, and the chilled water is absorbed by the condensed water to realize cooling; in the refrigerating operation mode, the internal evaporating agent evaporates to take away the heat of the chilled water, and the low-temperature chilled water is continuously output.
The system also comprises a regenerator for cooling the high-temperature concentrated solution and preheating the diluted solution; the absorber is provided with a sprayer for spraying hot water or circulating water by using the cooled high-temperature concentrated solution, and the hot water or the circulating water flows to the condenser after being sprayed and heated, and flows out after absorbing the heat of steam in the condenser; the absorber is internally provided with an adjusting component, the adjusting component comprises a liquid storage area for storing high-temperature concentrated solution, and a sufficient solution storage capacity of the system is ensured; under the condition that the first waste heat steam or the second waste heat steam is less, the first switching valve is closed, the second switching valve is opened, and mercury conveys the high-temperature concentrated solution in the liquid storage area to a sprayer for spraying; the solution heat accumulating type waste heat recovery technology is coupled with enterprise heating and refrigerating, the system can store a part of concentrated solution when waste heat sources are rich, and due to the integrated design of the storage area and the absorber, the system has a heat preservation effect, can take a part of concentrated solution to enter the system for circulation when the waste heat sources are less, and can better absorb waste heat by increasing circulation quantity and circulation concentration, so that the system can stably run under the condition of fluctuation of waste heat source load, and the heating and refrigerating requirements of a user side are met.
The system further comprises a valve for controlling the flow direction of the concentrated solution, the dilute solution, the condensed water and the steam, in this embodiment, the condensed water inlet and the second waste heat steam outlet in the evaporator are both provided with valves, the first dilute solution conveying pipeline between the generator and the regenerator is provided with a valve, the dilute solution pipeline and the concentrated solution pipeline between the heat exchange separator and the first dilute solution conveying pipeline in the refrigeration mode are both provided with valves, and the steam pipeline and the condensed water pipeline in seven years are provided with valves during the heat exchange separator and the condenser.
Referring to fig. 5, in this embodiment, a heating method of a solution heat storage type hot and cold water system is provided, and the method includes:
s1, enabling a low-temperature heat source to enter a generator, and heating a dilute solution;
s2, boiling the diluted solution after heating to generate high-temperature concentrated solution and steam, cooling the high-temperature concentrated solution in a heat regenerator, and enabling the steam to enter a condenser;
s3, enabling the cooled high-temperature concentrated solution to enter an absorber, spraying heated hot water or circulating water, enabling the heated hot water or circulating water to enter a condenser, absorbing heat of steam, and enabling the steam to release heat and condense to form condensed water;
s4, the low-temperature heat source flows from the generator to the shell-and-tube heat collector, and waste heat is transferred to the heat exchange separator through the antifreeze fluid;
s5, the condensed water is decompressed by a decompression valve and enters a heat exchange separator to absorb waste heat and then is vaporized into first waste heat steam;
s6, the first waste heat steam enters an absorber and heats the high-temperature concentrated solution;
and S7, adjusting the adjusting component in the absorber according to the amount of the first waste heat steam, storing the high-temperature concentrated solution under the condition that the first waste heat steam is rich, and conveying the stored high-temperature concentrated solution to the sprayer under the condition that the first waste heat steam is less.
Referring to fig. 6, in this embodiment, a method for refrigerating a solution heat accumulating type hot and cold water system is provided, and the method includes:
l1, a low-temperature heat source enters a generator to heat a dilute solution;
l2, boiling the diluted solution after heating to generate high-temperature concentrated solution and steam, cooling the high-temperature concentrated solution in a heat regenerator, and enabling the steam to enter a condenser;
l3, enabling the cooled high-temperature concentrated solution to enter an absorber, spraying heated hot water or circulating water, enabling the heated hot water or circulating water to enter a condenser, absorbing heat of steam, and enabling the steam to release heat and condense to form condensed water;
l4, the condensed water is decompressed by a decompression valve and then enters an evaporator, and the heat of the chilled water in the evaporator is absorbed and then is vaporized into second waste heat steam;
l5, the second waste heat steam enters an absorber, and the high-temperature concentrated solution is heated;
l6, adjusting the adjusting component in the absorber according to the amount of the second waste heat steam, storing the high-temperature concentrated solution under the condition that the second waste heat steam is rich, and conveying the stored high-temperature concentrated solution to the sprayer under the condition that the second waste heat steam is less;
l7, a low-temperature heat source flows from the generator to the shell-and-tube heat collector, a dilute solution flows from the regenerator to the heat exchange separator, and then flows from the heat exchange separator to the shell-and-tube heat collector, and the dilute solution is heated in the shell-and-tube heat collector through the waste heat of the low-temperature heat source to form high-temperature concentrated solution and steam;
the high-temperature concentrated solution formed in the L8 and L7 steps flows to the generator, and the steam formed in the L7 step enters the condenser.
It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art and which are included in the embodiments of the present invention without the inventive step, are intended to be within the scope of the present invention. Structures, devices and methods of operation not specifically described and illustrated herein, unless otherwise indicated and limited, are implemented according to conventional means in the art.
Claims (10)
1. A solution heat accumulating type hot and cold water system, characterized by comprising:
a generator, a low temperature heat source is connected to the generator, and the dilute solution in the generator is heated;
the low-temperature heat source flows from the generator to the shell-and-tube heat collector, and waste heat is transmitted to the heat exchange separator in the shell-and-tube heat collector and then is discharged out of the unit;
boiling the diluted solution after heating to generate high-temperature concentrated solution and steam;
a condenser for absorbing heat of the steam to form condensed water;
in a heating mode, the condensed water flows to the heat exchange separator, absorbs waste heat and is vaporized into first waste heat steam, and then enters the absorber;
in a refrigeration mode, the condensed water enters an evaporator to absorb heat and evaporate into second waste heat steam, and then flows to the absorber;
a regenerator for cooling the Gao Wennong solution and preheating the dilute solution;
the absorber is provided with a sprayer for spraying hot water or circulating water by using the cooled Gao Wennong solution, the hot water or the circulating water flows to the condenser after being sprayed and heated, and the heat of the steam is absorbed in the condenser and flows out.
An adjusting component is further arranged in the absorber, the Gao Wennong solution is stored under the condition that the first waste heat steam or the second waste heat steam is rich, and the Gao Wennong solution stored is conveyed to the sprayer under the condition that the first waste heat steam or the second waste heat steam is less;
chilled water is arranged in the evaporator, and the chilled water absorbs heat by the condensed water.
2. The solution heat accumulating type hot and cold water system according to claim 1, wherein the regulating assembly comprises a liquid storage area for storing the Gao Wennong solution, and the liquid storage area and the sprayer are blocked by a partition plate.
3. The solution heat accumulating type hot and cold water system according to claim 2, wherein a descending pipe and a ascending pipe are connected between the liquid storage area and the high-temperature concentrated solution, a first switching valve is arranged on the descending pipe, mercury and a second switching valve are arranged on the ascending pipe, the first switching valve is opened under the condition that the first waste heat steam or the second waste heat steam is rich, the second switching valve is closed, and the Gao Wennong solution enters the liquid storage area for storage through the descending pipe; and under the condition that the first waste heat steam or the second waste heat steam is less, the first switching valve is closed, the second switching valve is opened, and the mercury conveys the Gao Wennong solution in the liquid storage area to the sprayer for spraying.
4. The solution heat accumulating type cold and hot water system according to claim 1, wherein a pressure reducing valve is arranged at an outlet of the condenser for reducing the condensed water.
5. The solution heat accumulating type cold and hot water system according to claim 1, further comprising a low temperature heat source pipeline, a hot water or circulating water pipeline, a steam pipeline, a chilled water pipeline, a solution pipeline, a condensed water pipeline and an antifreeze liquid pipeline, wherein the antifreeze liquid pipeline connects the shell-and-tube heat collector and the heat exchange separator.
6. The solution heat accumulating type hot and cold water system according to claim 1, further comprising a valve for controlling the flow direction of the concentrated solution, the diluted solution, the condensed water and the steam.
7. A method for heating a solution heat accumulating type hot and cold water system, wherein the method is applicable to the system as claimed in any one of claims 1 to 6, and the method comprises the following steps:
s1, enabling a low-temperature heat source to enter a generator, and heating a dilute solution;
s2, boiling the diluted solution after heating to generate high-temperature concentrated solution and steam, wherein the Gao Wennong solution enters a heat regenerator for cooling, and the steam enters a condenser;
s3, enabling the cooled high-temperature concentrated solution to enter an absorber, spraying heated hot water or circulating water, enabling the heated hot water or circulating water to enter a condenser, absorbing heat of steam, and enabling the steam to release heat and condense to form condensed water.
8. The method for heating a solution heat accumulating type hot and cold water system according to claim 7, further comprising:
s4, the low-temperature heat source flows from the generator to the shell-and-tube heat collector, and waste heat is transferred to the heat exchange separator through antifreeze fluid;
s5, the condensed water is decompressed by a decompression valve and enters the heat exchange separator to absorb waste heat and then is vaporized into first waste heat steam;
s6, enabling the first waste heat steam to enter an absorber, and heating the Gao Wennong solution;
and S7, adjusting the adjusting component in the absorber according to the amount of the first waste heat steam, storing the Gao Wennong solution under the condition that the first waste heat steam is rich, and conveying the stored Gao Wennong solution to the sprayer under the condition that the first waste heat steam is less.
9. A method for refrigerating a solution heat accumulating type hot and cold water system, characterized in that the method is applicable to the system as claimed in any one of the preceding claims 1 to 6, and the method comprises:
l1, a low-temperature heat source enters a generator to heat a dilute solution;
l2, boiling the diluted solution after heating to generate high-temperature concentrated solution and steam, wherein the Gao Wennong solution enters a heat regenerator for cooling, and the steam enters a condenser;
l3, enabling the cooled high-temperature concentrated solution to enter an absorber, spraying heated hot water or circulating water, enabling the heated hot water or circulating water to enter a condenser, absorbing heat of steam, and enabling the steam to release heat and condense to form condensed water;
and L4, the condensed water is decompressed by a decompression valve and then enters an evaporator, and the heat of the chilled water in the evaporator is absorbed and then is vaporized into second waste heat steam.
10. The method for refrigerating a solution heat accumulating type hot and cold water system according to claim 9, further comprising:
l5, enabling the second waste heat steam to enter an absorber, and heating the Gao Wennong solution;
l6, adjusting an adjusting component in the absorber according to the amount of the second waste heat steam, storing the Gao Wennong solution under the condition that the second waste heat steam is rich, and conveying the Gao Wennong solution stored to the sprayer under the condition that the second waste heat steam is less;
l7, enabling the low-temperature heat source to flow from the generator to a shell-and-tube type heat collector, enabling the dilute solution to flow from the heat regenerator to the heat exchange separator, and enabling the dilute solution to flow from the heat exchange separator to the shell-and-tube type heat collector, and heating the dilute solution in the shell-and-tube type heat collector through waste heat of the low-temperature heat source to form high-temperature concentrated solution and steam;
and L8, flowing the high-temperature concentrated solution formed in the step L7 to the generator, and enabling the steam formed in the step L7 to enter the condenser.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310114995.3A CN116265836A (en) | 2023-02-14 | 2023-02-14 | Solution heat accumulating type cold and hot water system and refrigerating and heating method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310114995.3A CN116265836A (en) | 2023-02-14 | 2023-02-14 | Solution heat accumulating type cold and hot water system and refrigerating and heating method thereof |
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| CN202310114995.3A Pending CN116265836A (en) | 2023-02-14 | 2023-02-14 | Solution heat accumulating type cold and hot water system and refrigerating and heating method thereof |
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| Country | Link |
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| CN (1) | CN116265836A (en) |
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