CN114992902A - Multi-energy complementary distributed cold-heat-electricity energy supply device and operation method - Google Patents
Multi-energy complementary distributed cold-heat-electricity energy supply device and operation method Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
- F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
- F25B15/06—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being water vapour evaporated from a salt solution, e.g. lithium bromide
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/18—Hot-water central heating systems using heat pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
- F24T10/10—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground
- F24T10/13—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- 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
- 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
- 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
- F25B41/00—Fluid-circulation arrangements
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion 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
- F25B49/043—Operating continuously
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/11—Geothermal energy
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/12—Heat pump
- F24D2200/126—Absorption type heat pumps
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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Abstract
The invention relates to the technical field of distributed energy supply devices and operation methods, in particular to a multi-energy complementary distributed cold, heat and electricity energy supply device and an operation method. The ejector is introduced between the high-pressure generator and the low-pressure generator, the generation pressure of the low-pressure generator can be reduced, the device can recover the heat of hot water at lower temperature, and the conversion of multiple-effect modes can be carried out according to the change of environmental conditions; the invention also introduces a vertical buried pipe, can realize heat in deep soil, and is provided with a reversing valve on a pipeline, so that the system can realize heat supply in winter and cold supply in summer, and the energy utilization rate of the whole distributed energy supply system is improved.
Description
Technical Field
The invention relates to the technical field of distributed energy supply devices and operation methods, in particular to a multi-energy complementary distributed cold, heat and electricity energy supply device and an operation method.
Background
The energy is the life pulse of national economy and plays a significant role in the sustainable development of society. In recent years, with the increasing demand of energy, the environmental pressure is increasing, so that the structure of an energy system is changed and developed rapidly, and a distributed energy supply system with multiple energy complementation has the advantages of reasonably adjusting the energy structure, improving the energy utilization rate, reducing environmental pollution and the like, and is an effective way for solving the energy problem, but still faces many problems.
Disclosure of Invention
The invention provides a distributed cooling, heating and power energy supply device with multi-energy complementation and an operation method thereof, which overcome the defects of the prior art, can realize the cascade utilization of multi-source waste heat and improve the energy utilization efficiency; an ejector is introduced between the high-pressure generator and the low-pressure generator, so that the generation pressure of the low-pressure generator can be reduced, and the device can recover the heat of hot water at lower temperature; the device also introduces a vertical buried pipe, and the temperature of water in the pipe is improved by absorbing heat in deep soil.
One of the technical schemes of the invention is realized by the following measures: a multi-energy complementary distributed cooling, heating and power energy supply device comprises a high-pressure generator, a high-temperature solution heat exchanger, an absorber, an evaporator, a condenser, a first low-pressure generator, a second low-pressure generator, an ejector, a vertical buried pipe, a cooling tower, a low-temperature solution heat exchanger, a first reversing valve, a second reversing valve, a third reversing valve and a fourth reversing valve; a lithium bromide dilute solution outlet of the absorber is communicated with a lithium bromide dilute solution inlet of the high-temperature solution heat exchanger through a first lithium bromide solution pipeline, a lithium bromide dilute solution outlet of the high-temperature solution heat exchanger is communicated with a lithium bromide dilute solution inlet of the high-pressure generator through a second lithium bromide solution pipeline, a concentrated lithium bromide solution outlet of the high-pressure generator is communicated with a concentrated lithium bromide solution inlet of the high-temperature solution heat exchanger through a first concentrated lithium bromide solution pipeline, a concentrated lithium bromide solution outlet of the high-temperature solution heat exchanger is communicated with a lithium bromide concentrated solution inlet of the absorber through a second concentrated lithium bromide solution pipeline, the first lithium bromide solution pipeline is communicated with a lithium bromide dilute solution inlet of the low-temperature solution heat exchanger through a third lithium bromide solution pipeline, a lithium bromide dilute solution outlet of the low-temperature solution heat exchanger is communicated with a lithium bromide dilute solution inlet of the second low-pressure generator through a third lithium bromide solution pipeline, the fourth lithium bromide solution pipeline is communicated with a lithium bromide dilute solution inlet of the first low-pressure generator through a fifth lithium bromide solution pipeline; a lithium bromide concentrated solution outlet of the second low-pressure generator is communicated with a lithium bromide concentrated solution inlet of the low-temperature solution heat exchanger through a third concentrated lithium bromide solution pipeline, a lithium bromide concentrated solution outlet of the low-temperature solution heat exchanger is communicated with the second concentrated lithium bromide solution pipeline through a fourth concentrated lithium bromide solution pipeline, and a lithium bromide concentrated solution outlet of the first low-pressure generator is communicated with the third concentrated lithium bromide solution pipeline through a fifth concentrated lithium bromide solution pipeline; a high-pressure heat pump cycle working medium steam outlet of the high-pressure generator is communicated with a high-pressure heat pump cycle working medium steam inlet of the first low-pressure generator through a first heat pump cycle working medium steam pipeline, the first heat pump cycle working medium steam pipeline is communicated with a working fluid inlet of the ejector through a working fluid pipeline, a first low-pressure heat pump cycle working medium steam outlet of the first low-pressure generator is communicated with a heat pump cycle working medium steam inlet of the condenser through a first low-pressure cycle working medium steam pipeline, a second low-pressure heat pump cycle working medium steam outlet of the first low-pressure generator is communicated with an injected fluid inlet of the ejector through a second low-pressure cycle working medium steam pipeline, a low-pressure heat pump cycle working medium steam outlet of the second low-pressure generator is communicated with a second low-pressure cycle working medium steam pipeline through a third low-pressure cycle working medium steam pipeline, a working fluid outlet of the ejector is communicated with a cycle working medium steam inlet of the condenser through a cycle steam pipeline, the second low-pressure circulating working medium steam pipeline is communicated with the circulating working medium steam pipeline through a low-pressure circulating working medium steam connecting pipeline; a saturated circulating working medium water outlet of the condenser is communicated with a saturated circulating working medium water inlet of the evaporator through a saturated circulating working medium water pipeline, and a saturated steam outlet of the evaporator is communicated with a saturated steam inlet of the absorber through a saturated steam pipeline; a first port of the first reversing valve is communicated with a high-temperature water inlet of the cooling tower through a first water pipeline, a cooling water outlet of the cooling tower is communicated with a first port of a fourth reversing valve through a first cooling water pipeline, a second port of the fourth reversing valve is communicated with a heat supply network water return pipeline, a third port of the fourth reversing valve is communicated with a cooling water side inlet of the absorber, a cooling water side outlet of the absorber is communicated with a cooling water side inlet of the condenser through a second cooling water pipeline, a cooling water side outlet of the condenser is communicated with a heat load pipeline, a fourth port of the fourth reversing valve is communicated with a vertical buried pipe inlet, a vertical buried pipe outlet is communicated with a first port of the third reversing valve through a second water pipeline, a second port of the third reversing valve is communicated with a refrigerant water pipeline, a third port of the third reversing valve is communicated with a water inlet of the evaporator, a water outlet of the evaporator is communicated with a first port of the second reversing valve, and a second port of the second reversing valve is communicated with a water inlet of the cooling tower, and a third port of the second reversing valve is communicated with a cold load pipeline.
The following is a further optimization or/and improvement of one of the above-mentioned technical solutions of the invention:
a liquid remover is arranged in the high-pressure generator.
A first solution pump is installed on a first lithium bromide solution pipeline between the third lithium bromide solution pipeline and a lithium bromide dilute solution inlet of the high-temperature solution heat exchanger, a second solution pump is installed on a first lithium bromide solution pipeline at a lithium bromide dilute solution outlet close to the absorber, a third solution pump is installed on a second water pipeline, and a fourth solution pump is installed on a first cooling water pipeline; a first throttling valve is arranged on a second concentrated lithium bromide solution pipeline between a concentrated lithium bromide solution outlet of the high-temperature solution heat exchanger and a fourth concentrated lithium bromide solution pipeline, and a second throttling valve is arranged on the fourth concentrated lithium bromide solution pipeline; and a fourth throttle valve is installed on the first low-pressure circulating working medium steam pipe, a third throttle valve is installed on the saturated circulating working medium water pipe, a first flow regulating valve is installed on the fifth lithium bromide solution pipe, a second flow regulating valve is installed on the third lithium bromide solution pipe, a third flow regulating valve is installed on the working fluid pipe, and a fourth flow regulating valve is installed on the second low-pressure circulating working medium steam pipe close to the inlet of the injected fluid.
The energy storage device is electrically connected with the power supply equipment, the power supply equipment is connected with the power input end of the electric heating boiler, the high-temperature water outlet of the electric heating boiler is communicated with the driving heat source inlet of the second low-pressure generator through a high-temperature water pipeline, and the driving heat source outlet of the second low-pressure generator is communicated with the backflow end of the electric heating boiler through a backflow pipeline.
The power supply equipment comprises a gas generator set, a high-temperature flue gas outlet of the gas generator set is communicated with a driving heat source inlet of a high-pressure generator, and a driving heat source outlet of the high-pressure generator is communicated with a high-temperature flue gas return port of the gas generator set.
The second technical scheme of the invention is realized by the following measures: the operation method of the multi-energy complementary distributed cooling, heating and power energy supply device comprises the following steps that a lithium bromide dilute solution is boosted to a low-pressure generating pressure through a second solution pump and then is divided into two paths: one path of the solution is boosted by a first solution pump and heated by a high-temperature solution heat exchanger and then enters a lithium bromide dilute solution inlet of a high-pressure generator, the lithium bromide dilute solution in the high-pressure generator is heated to release steam to form a concentrated lithium bromide solution, and then the concentrated lithium bromide solution enters an absorber lithium bromide concentrated solution inlet after being cooled by the high-temperature solution heat exchanger and reduced in pressure by a first throttle valve to form solution circulation of a heat pump system; heating the other path of lithium bromide dilute solution by a low-temperature solution heat exchanger, respectively entering a first low-pressure generator and a second low-pressure generator, heating the dilute lithium bromide solution in the first low-pressure generator and the second low-pressure generator to release steam to form a concentrated lithium bromide solution, cooling by the low-temperature solution heat exchanger, reducing the pressure by a second throttle valve, and then entering an absorber lithium bromide concentrated solution inlet to form solution circulation of a heat pump; one part of high-pressure circulating working medium steam generated by the high-pressure generator enters the first low-pressure generator as a heating source of the first low-pressure generator, and the other part of the high-pressure circulating working medium steam enters the ejector as working fluid to eject the low-pressure circulating working medium steam generated by the first low-pressure generator and the second low-pressure generator, is mixed by the ejector and then enters the condenser; the saturated cycle working medium water from the condenser is subjected to pressure reduction by a third throttle valve, is absorbed by the evaporator to become saturated steam, then enters an absorber cycle working medium steam inlet to release heat, is absorbed by a concentrated lithium bromide solution in the absorber to become a dilute lithium bromide solution, and starts new cycle; the vertical buried pipe is used for absorbing heat in deep soil and is provided with a first reversing valve, a second reversing valve, a third reversing valve and a fourth reversing valve, so that the device can supply heat in winter and cool in summer; when refrigeration is needed, the first reversing valve and the fourth reversing valve are adjusted to enable water from the cooling tower to pass through the absorber and the condenser in sequence to be absorbed and then return to the cooling tower to release heat, and the second reversing valve and the third reversing valve are adjusted to enable refrigerant water to enter the evaporator to release heat so as to meet the requirement of a refrigeration load; when heating is needed, the first reversing valve and the fourth reversing valve are adjusted, and the heat supply backwater sequentially passes through the absorber and the condenser to absorb heat, so that the heat load requirement is met.
The ejector is introduced between the high-pressure generator and the low-pressure generator, and the flow regulating valve is installed, so that the generation pressure of the first low-pressure generator and the second low-pressure generator can be reduced, the heat of hot water at lower temperature can be recovered by the device, and the conversion of a multi-effect mode can be performed according to the change of environmental conditions; in addition, the vertical buried pipe is introduced, heat in deep soil can be absorbed, and the reversing valve is arranged on the pipeline, so that the system can supply heat in winter and cool in summer, the problem that heat in tap water cannot be normally utilized due to too low temperature in winter can be effectively solved, and the energy utilization rate of the whole distributed energy supply system is improved.
Drawings
FIG. 1 is a schematic process flow diagram of the present invention.
The codes in the figures are respectively: 1 is a high-pressure generator, 2 is a high-temperature solution heat exchanger, 3 is a first solution pump, 4 is a second solution pump, 5 is an absorber, 6 is an evaporator, 7 is a condenser, 8 is a first low-pressure generator, 9 is a second low-pressure generator, 10 is a third solution pump, 11 is a fourth solution pump, 12 is an ejector, 13 is a first throttle valve, 14 is a second throttle valve, 15 is a third throttle valve, 16 is a fourth throttle valve, 17 is a first flow rate regulating valve, 18 is a second flow rate regulating valve, 19 is a third flow rate regulating valve, 20 is a fourth flow rate regulating valve, 21 is a first change valve, 22 is a second change valve, 23 is a third change valve, 24 is a fourth change valve, 25 is a vertically buried pipe, 26 is a cooling tower, 27 is a low-temperature solution heat exchanger, 28 is a refrigerant water line, 29 is a cooling load line, 30 is a first lithium bromide solution line, 31 is a second lithium bromide solution line, 32 is a first concentrated lithium bromide solution pipeline, 33 is a second concentrated lithium bromide solution pipeline, 34 is a third lithium bromide solution pipeline, 35 is a third lithium bromide solution pipeline, 36 is a fifth lithium bromide solution pipeline, 37 is a third concentrated lithium bromide solution pipeline, 38 is a fourth concentrated lithium bromide solution pipeline, 39 is a fifth concentrated lithium bromide solution pipeline, 40 is a first heat pump cycle fluid steam pipeline, 41 is a working fluid pipeline, 42 is a first low-pressure cycle fluid steam pipeline, 43 is a second low-pressure cycle fluid steam pipeline, 44 is a third low-pressure cycle fluid steam pipeline, 45 is a cycle fluid steam pipeline, 46 is a low-pressure cycle fluid steam connecting pipeline, 47 is a saturated cycle fluid water pipeline, 48 is a saturated steam pipeline, 49 is a first water pipeline, 50 is a first cooling water pipeline, 51 is a heat grid water return pipeline, 52 is a second cooling water pipeline, 53 is a heat load pipeline, and 54 is a second water line.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention.
In the present invention, for convenience of description, the description of the relative positional relationship of the components is described according to the layout pattern of fig. 1 of the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of fig. 1 of the specification.
The invention is further described below with reference to the following examples:
example 1: as shown in fig. 1, the distributed cooling, heating and power supply device with multiple energy complementation comprises a high-pressure generator 1, a high-temperature solution heat exchanger 2, an absorber 5, an evaporator 6, a condenser 7, a first low-pressure generator 8, a second low-pressure generator 9, an ejector 12, a vertical buried pipe 25, a cooling tower 26, a low-temperature solution heat exchanger 27, a first reversing valve 21, a second reversing valve 22, a third reversing valve 23 and a fourth reversing valve 24; a lithium bromide dilute solution outlet of the absorber 5 is communicated with a lithium bromide dilute solution inlet of the high-temperature solution heat exchanger 2 through a first lithium bromide solution pipeline 30, a lithium bromide dilute solution outlet of the high-temperature solution heat exchanger 2 is communicated with a lithium bromide dilute solution inlet of the high-pressure generator 1 through a second lithium bromide solution pipeline 31, a concentrated lithium bromide solution outlet of the high-pressure generator 1 is communicated with a concentrated lithium bromide solution inlet of the high-temperature solution heat exchanger 2 through a first concentrated lithium bromide solution pipeline 32, a concentrated lithium bromide solution outlet of the high-temperature solution heat exchanger 2 is communicated with a lithium bromide concentrated solution inlet of the absorber 5 through a second concentrated lithium bromide solution pipeline 33, a lithium bromide solution inlet of the first lithium bromide solution pipeline 30 and a lithium bromide dilute solution inlet of the low-temperature solution heat exchanger 27 is communicated through a third lithium bromide solution pipeline 34, a lithium bromide dilute solution outlet of the low-temperature solution heat exchanger 27 is communicated with a lithium bromide dilute solution inlet of the second low-pressure generator 9 through a first lithium bromide solution pipeline 35, a third lithium bromide solution pipeline 35 is communicated with a lithium bromide dilute solution inlet of the first low-pressure generator 8 through a fifth lithium bromide solution pipeline 36; a lithium bromide concentrated solution outlet of the second low-pressure generator 9 is communicated with a lithium bromide concentrated solution inlet of the low-temperature solution heat exchanger 27 through a third concentrated lithium bromide solution pipeline 37, a lithium bromide concentrated solution outlet of the low-temperature solution heat exchanger 27 is communicated with a second concentrated lithium bromide solution pipeline 33 through a fourth concentrated lithium bromide solution pipeline 38, and a lithium bromide concentrated solution outlet of the first low-pressure generator 8 is communicated with the third concentrated lithium bromide solution pipeline 37 through a fifth concentrated lithium bromide solution pipeline 39; a high-pressure heat pump circulating working medium steam outlet of the high-pressure generator 1 is communicated with a high-pressure heat pump circulating working medium steam inlet of a first low-pressure generator 8 through a first heat pump circulating working medium steam pipeline 40, the first heat pump circulating working medium steam pipeline 40 is communicated with a working fluid inlet of an ejector 12 through a working fluid pipeline 41, a first low-pressure heat pump circulating working medium steam outlet of the first low-pressure generator 8 is communicated with a heat pump circulating working medium steam inlet of a condenser 7 through a first low-pressure circulating working medium steam pipeline 42, a second low-pressure heat pump circulating working medium steam outlet of the first low-pressure generator 8 is communicated with an injected fluid inlet of the ejector 12 through a second low-pressure circulating working medium steam pipeline 43, and a low-pressure heat pump circulating working medium steam outlet of a second low-pressure generator 9 is communicated with the second low-pressure circulating working medium steam pipeline 43 through a third low-pressure circulating working medium steam pipeline 44, the working fluid outlet of the ejector 12 is communicated with the circulating working medium steam inlet of the condenser 7 through a circulating working medium steam pipeline 45, and the second low-pressure circulating working medium steam pipeline 43 is communicated with the circulating working medium steam pipeline 45 through a low-pressure circulating working medium steam connecting pipeline 46; a saturated circulating working medium water outlet of the condenser 7 is communicated with a saturated circulating working medium water inlet of the evaporator 6 through a saturated circulating working medium water pipeline 47, and a saturated steam outlet of the evaporator 6 is communicated with a saturated steam inlet of the absorber 5 through a saturated steam pipeline 48; a first port of the first reversing valve 21 is communicated with a high-temperature water inlet of a cooling tower 26 through a first water pipeline 49, a cooling water outlet of the cooling tower 26 is communicated with a first port of a fourth reversing valve 24 through a first cooling water pipeline 50, a second port of the fourth reversing valve 24 is communicated with a heat net water return pipeline 51, a third port of the fourth reversing valve 24 is communicated with a cooling water side inlet of an absorber 5, a cooling water side outlet of the absorber 5 is communicated with a cooling water side inlet of a condenser 7 through a second cooling water pipeline 52, a cooling water side outlet of the condenser 7 is communicated with a heat load pipeline 53, a fourth port of the fourth reversing valve 24 is communicated with an inlet of a vertical buried pipe 25, an outlet of the vertical buried pipe 25 is communicated with a first port of a third reversing valve 23 through a second water pipeline 54, a second port of the third reversing valve 23 is communicated with a cold water pipeline 28, a third port of the third reversing valve 23 is communicated with a water inlet of an evaporator 6, the water outlet of the evaporator 6 is communicated with the first port of the second reversing valve 22, the second port of the second reversing valve 22 is communicated with the water inlet of the cooling tower 26, and the third port of the second reversing valve 22 is communicated with a cold load pipeline 29.
The invention can utilize the waste heat of various heat sources to realize the comprehensive cascade utilization of energy, and the ejector 12 is introduced between the high-pressure generator 1 and the low-pressure generator and the flow regulating valve is arranged, so that the generation pressure of the first low-pressure generator 8 and the second low-pressure generator 9 can be reduced, the device can recover the heat of hot water with lower temperature, and the conversion of multiple-effect modes can be carried out according to the change of environmental conditions.
According to the invention, the vertical buried pipe 25 is introduced, so that heat in deep soil can be absorbed, and the reversing valve is arranged on the pipeline, so that the system can supply heat in winter and cool in summer, the problem that the heat in tap water cannot be normally utilized due to too low temperature in winter can be effectively solved, and the energy utilization rate of the whole distributed energy supply system is improved.
Example 2: as shown in FIG. 1, as an optimization of embodiment 1, a liquid remover is arranged in the high-pressure generator 1.
Considering that the steam generated by the high pressure generator 1 may carry some droplets of the lithium bromide solution, in order to reduce the loss of the lithium bromide solution, a liquid remover is provided in the high pressure generator 1 to separate and recover the lithium bromide solution in the steam.
Example 3: as shown in fig. 1, as an optimization of the above embodiment, a first solution pump 3 is installed on the first lithium bromide solution line 30 between the third lithium bromide solution line 34 and the lithium bromide dilute solution inlet of the high temperature solution heat exchanger 2, a second solution pump 4 is installed on the first lithium bromide solution line 30 near the lithium bromide dilute solution outlet of the absorber 5, a third solution pump 10 is installed on the second water line 54, and a fourth solution pump 11 is installed on the first cooling water line 50; a first throttle valve 13 is arranged on a second concentrated lithium bromide solution pipeline 33 between a concentrated lithium bromide solution outlet of the high-temperature solution heat exchanger 2 and a fourth concentrated lithium bromide solution pipeline 38, and a second throttle valve 14 is arranged on the fourth concentrated lithium bromide solution pipeline 38; the fourth throttle valve 16 is installed on the first low-pressure circulating working medium steam pipeline 42, the third throttle valve 15 is installed on the saturated circulating working medium water pipeline 47, the first flow regulating valve 17 is installed on the fifth lithium bromide solution pipeline 36, the second flow regulating valve 18 is installed on the third lithium bromide solution pipeline 34, the third flow regulating valve 19 is installed on the working fluid pipeline 41, and the fourth flow regulating valve 20 is installed on the second low-pressure circulating working medium steam pipeline 43 close to the inlet of the injected fluid.
An ejector 12 is introduced between the high pressure generator 1 and the first and second low pressure generators 8 and 9, which can reduce the pressure generated by the first and second low pressure generators 8 and 9, so that the system can recover the heat of the hot water at a lower temperature, and a third flow regulating valve 19 and a fourth flow regulating valve 20 are installed, so that the system can perform multi-effect conversion.
Example 4: as shown in fig. 1, as an optimization of the above embodiment, the system further includes an energy storage device, a power supply device, and an electric boiler, wherein the energy storage device is electrically connected to the power supply device, the power supply device is connected to a power input end of the electric boiler, a high-temperature water outlet of the electric boiler is communicated with a driving heat source inlet of the second low-voltage generator 9 through a high-temperature water pipeline, and a driving heat source outlet of the second low-voltage generator 9 is communicated with a return end of the electric boiler through a return pipeline; the power supply equipment comprises a gas generator set, a high-temperature flue gas outlet of the gas generator set is communicated with a driving heat source inlet of the high-pressure generator 1, and a driving heat source outlet of the high-pressure generator 1 is communicated with a high-temperature flue gas return port of the gas generator set.
The power supply equipment can also comprise an existing public power grid, wind energy equipment and photovoltaic equipment which are used for generating power with the gas turbine unit to meet the electric load, and an electric storage device (an existing energy storage system) is added, so that the peak clipping and valley filling effects can be realized on the system.
In the high-voltage generator 1, the flue gas waste heat generated by the gas turbine unit is used as a driving heat source, and in the second low-voltage generator 9, the high-temperature hot water generated by the electric boiler is used as a driving heat source, so that the heat pump system is driven by multiple heat sources in a combined manner, and the cascade utilization of the multi-source waste heat is realized.
Example 5: the operation method of the distributed cooling, heating and power supply device with the multi-energy complementation in the embodiment includes that the lithium bromide dilute solution is boosted to low pressure by the second solution pump 4 and then is divided into two paths: one path of the solution is boosted by a first solution pump 3 and heated by a high-temperature solution heat exchanger 2 and then enters a lithium bromide dilute solution inlet of a high-pressure generator 1, the lithium bromide dilute solution in the high-pressure generator 12 is heated by flue gas generated by a gas turbine set to release steam to form a concentrated lithium bromide solution, and then the concentrated lithium bromide solution enters a lithium bromide concentrated solution inlet of an absorber 5 after being cooled by the high-temperature solution heat exchanger 2 and reduced in pressure by a first throttle valve 13 to form solution circulation of a heat pump system; the other path of lithium bromide dilute solution is heated by a low-temperature solution heat exchanger 27 and respectively enters a first low-pressure generator 8 and a second low-pressure generator 9, a driving heat source of the second low-pressure generator 9 comes from high-temperature hot water generated by an electric heating boiler 28, the dilute lithium bromide solution is heated in the first low-pressure generator 8 and the second low-pressure generator 9 to release steam to form a concentrated lithium bromide solution, and then the concentrated lithium bromide solution enters an absorber 5 lithium bromide concentrated solution inlet after being cooled by the low-temperature solution heat exchanger 27 and reduced in pressure by a second throttle valve 14 to form solution circulation of a heat pump; one part of high-pressure circulating working medium steam generated by the high-pressure generator 1 enters the first low-pressure generator 8 as a heating heat source of the high-pressure circulating working medium steam, the other part of the high-pressure circulating working medium steam enters the ejector 12 as working fluid to eject the low-pressure circulating working medium steam generated by the first low-pressure generator 8 and the second low-pressure generator 9, the low-pressure circulating working medium steam is mixed by the ejector 12 and then enters the condenser 7, the fourth flow regulating valve 20 is installed at the ejector 12, and if the valve is closed, the high-pressure circulating working medium steam can be converted into a double-effect absorption heat pump system, so that the applicability of the system is improved; the saturated cycle working medium water from the condenser 7 is subjected to pressure reduction through a third throttle valve 15, the evaporator 6 absorbs heat to become saturated steam, then the saturated cycle working medium water enters an absorber 5 cycle working medium steam inlet to release heat, and is absorbed by a concentrated lithium bromide solution in the absorber 5 to become a dilute lithium bromide solution, and a new cycle is started; the vertical buried pipe 25 is used for absorbing heat in deep soil, and is provided with a first reversing valve 21, a second reversing valve 22, a third reversing valve 23 and a fourth reversing valve 24, so that the device can supply heat in winter and cool in summer; when refrigeration is needed, the first reversing valve 21 and the fourth reversing valve 24 are adjusted to enable water from the cooling tower 26 to pass through the absorber 5 and the condenser 7 in sequence for absorption, then the water returns to the cooling tower 26 for heat release, and the second reversing valve 22 and the third reversing valve 23 are adjusted to enable refrigerant water to enter the evaporator 6 for heat release so as to meet the requirement of a cold load; when heating is needed, the first reversing valve 21 and the fourth reversing valve 24 are adjusted to enable heat supply backwater (heat supply network backwater) to sequentially pass through the absorber 5 and the condenser 7 to absorb heat so as to meet the heat load requirement; and the second reversing valve 22 and the third reversing valve 23 are adjusted to ensure that water from the cooling tower 26 sequentially enters the vertical buried pipe 25 to absorb heat and the evaporator 6 to release heat and then returns to the cooling tower 26, so that the normal and safe operation of the device is ensured.
The energy storage system is also introduced, so that the device can be ensured to run safely and stably and has the functions of peak clipping and valley filling; and the device is coupled with the jet-absorption composite heat pump, can supply heat in winter and cool in summer, fully recycles multi-source and multi-taste waste heat in the distributed energy system, realizes cascade utilization of energy, improves the energy utilization efficiency of the whole system, and realizes triple supply of electricity, heat and cold to users.
The technical characteristics form an embodiment of the invention, which has strong adaptability and implementation effect, and unnecessary technical characteristics can be increased or decreased according to actual needs to meet the requirements of different situations.
Claims (8)
1. A multi-energy complementary distributed cooling, heating and power energy supply device is characterized by comprising a high-pressure generator, a high-temperature solution heat exchanger, an absorber, an evaporator, a condenser, a first low-pressure generator, a second low-pressure generator, an ejector, a vertical buried pipe, a cooling tower, a low-temperature solution heat exchanger, a first reversing valve, a second reversing valve, a third reversing valve and a fourth reversing valve; a lithium bromide dilute solution outlet of the absorber is communicated with a lithium bromide dilute solution inlet of the high-temperature solution heat exchanger through a first lithium bromide solution pipeline, a lithium bromide dilute solution outlet of the high-temperature solution heat exchanger is communicated with a lithium bromide dilute solution inlet of the high-pressure generator through a second lithium bromide solution pipeline, a concentrated lithium bromide solution outlet of the high-pressure generator is communicated with a concentrated lithium bromide solution inlet of the high-temperature solution heat exchanger through a first concentrated lithium bromide solution pipeline, a concentrated lithium bromide solution outlet of the high-temperature solution heat exchanger is communicated with a lithium bromide concentrated solution inlet of the absorber through a second concentrated lithium bromide solution pipeline, the first lithium bromide solution pipeline is communicated with a lithium bromide dilute solution inlet of the low-temperature solution heat exchanger through a third lithium bromide solution pipeline, a lithium bromide dilute solution outlet of the low-temperature solution heat exchanger is communicated with a lithium bromide dilute solution inlet of the second low-pressure generator through a third lithium bromide solution pipeline, the fourth lithium bromide solution pipeline is communicated with a lithium bromide dilute solution inlet of the first low-pressure generator through a fifth lithium bromide solution pipeline; a lithium bromide concentrated solution outlet of the second low-pressure generator is communicated with a lithium bromide concentrated solution inlet of the low-temperature solution heat exchanger through a third concentrated lithium bromide solution pipeline, a lithium bromide concentrated solution outlet of the low-temperature solution heat exchanger is communicated with the second concentrated lithium bromide solution pipeline through a fourth concentrated lithium bromide solution pipeline, and a lithium bromide concentrated solution outlet of the first low-pressure generator is communicated with the third concentrated lithium bromide solution pipeline through a fifth concentrated lithium bromide solution pipeline; a high-pressure heat pump circulating working medium steam outlet of the high-pressure generator is communicated with a high-pressure heat pump circulating working medium steam inlet of the first low-pressure generator through a first heat pump circulating working medium steam pipeline, the first heat pump circulating working medium steam pipeline is communicated with a working fluid inlet of the ejector through a working fluid pipeline, a first low-pressure heat pump circulating working medium steam outlet of the first low-pressure generator is communicated with a heat pump circulating working medium steam inlet of the condenser through a first low-pressure circulating working medium steam pipeline, a second low-pressure heat pump circulating working medium steam outlet of the first low-pressure generator is communicated with an injected fluid inlet of the ejector through a second low-pressure circulating working medium steam pipeline, a low-pressure heat pump circulating working medium steam outlet of the second low-pressure generator is communicated with a second low-pressure circulating working medium steam pipeline through a third low-pressure circulating working medium steam pipeline, and a working fluid outlet of the ejector is communicated with a circulating working medium steam inlet of the condenser through a circulating steam pipeline, the second low-pressure circulating working medium steam pipeline is communicated with the circulating working medium steam pipeline through a low-pressure circulating working medium steam connecting pipeline; a saturated circulating working medium water outlet of the condenser is communicated with a saturated circulating working medium water inlet of the evaporator through a saturated circulating working medium water pipeline, and a saturated steam outlet of the evaporator is communicated with a saturated steam inlet of the absorber through a saturated steam pipeline; a first port of the first reversing valve is communicated with a high-temperature water inlet of the cooling tower through a first water pipeline, a cooling water outlet of the cooling tower is communicated with a first port of a fourth reversing valve through a first cooling water pipeline, a second port of the fourth reversing valve is communicated with a heat supply network water return pipeline, a third port of the fourth reversing valve is communicated with a cooling water side inlet of the absorber, a cooling water side outlet of the absorber is communicated with a cooling water side inlet of the condenser through a second cooling water pipeline, a cooling water side outlet of the condenser is communicated with a heat load pipeline, a fourth port of the fourth reversing valve is communicated with a vertical buried pipe inlet, a vertical buried pipe outlet is communicated with a first port of the third reversing valve through a second water pipeline, a second port of the third reversing valve is communicated with a refrigerant water pipeline, a third port of the third reversing valve is communicated with a water inlet of the evaporator, a water outlet of the evaporator is communicated with a first port of the second reversing valve, and a second port of the second reversing valve is communicated with a water inlet of the cooling tower, and a third port of the second reversing valve is communicated with a cold load pipeline.
2. The multi-energy complementary distributed cold, thermal and electrical energy supply device according to claim 1, wherein a liquid remover is arranged in the high voltage generator.
3. The distributed cold-thermal-electricity energy supply device with multi-energy complementation according to claim 1 or 2, characterized in that a first solution pump is installed on a first lithium bromide solution pipeline between a third lithium bromide solution pipeline and a lithium bromide dilute solution inlet of the high-temperature solution heat exchanger, a second solution pump is installed on the first lithium bromide solution pipeline at a lithium bromide dilute solution outlet close to the absorber, a third solution pump is installed on the second water pipeline, and a fourth solution pump is installed on the first cooling water pipeline; a first throttling valve is arranged on a second concentrated lithium bromide solution pipeline between a concentrated lithium bromide solution outlet of the high-temperature solution heat exchanger and a fourth concentrated lithium bromide solution pipeline, and a second throttling valve is arranged on the fourth concentrated lithium bromide solution pipeline; and a fourth throttle valve is installed on the first low-pressure circulating working medium steam pipe, a third throttle valve is installed on the saturated circulating working medium water pipe, a first flow regulating valve is installed on the fifth lithium bromide solution pipe, a second flow regulating valve is installed on the third lithium bromide solution pipe, a third flow regulating valve is installed on the working fluid pipe, and a fourth flow regulating valve is installed on the second low-pressure circulating working medium steam pipe close to the inlet of the injected fluid.
4. The multi-energy complementary distributed cold, heat and electricity energy supply device according to claim 1 or 2, further comprising an energy storage device, a power supply device and an electric heating boiler, wherein the energy storage device is electrically connected with the power supply device, the power supply device is connected with a power supply input end of the electric heating boiler, a high-temperature water outlet of the electric heating boiler is communicated with a driving heat source inlet of the second low-pressure generator through a high-temperature water pipeline, and a driving heat source outlet of the second low-pressure generator is communicated with a return end of the electric heating boiler through a return pipeline.
5. The multi-energy complementary distributed cold, heat and electricity energy supply device according to claim 3, further comprising an energy storage device, a power supply device and an electric boiler, wherein the energy storage device is electrically connected with the power supply device, the power supply device is connected with a power input end of the electric boiler, a high-temperature water outlet of the electric boiler is communicated with a driving heat source inlet of the second low-pressure generator through a high-temperature water pipeline, and a driving heat source outlet of the second low-pressure generator is communicated with a return end of the electric boiler through a return pipeline.
6. The multi-energy complementary distributed cold, heat and power supply device according to claim 4, wherein the power supply equipment comprises a gas generator set, a high-temperature flue gas outlet of the gas generator set is communicated with a driving heat source inlet of the high-pressure generator, and a driving heat source outlet of the high-pressure generator is communicated with a high-temperature flue gas return port of the gas generator set.
7. The multi-energy complementary distributed cold, heat and power supply device according to claim 5, wherein the power supply equipment comprises a gas generator set, a high-temperature flue gas outlet of the gas generator set is communicated with a driving heat source inlet of the high-pressure generator, and a driving heat source outlet of the high-pressure generator is communicated with a high-temperature flue gas return port of the gas generator set.
8. An operation method of the distributed cooling, heating and power supply device with multi-energy complementation according to claim 6 or 7, characterized in that the lithium bromide dilute solution is divided into two paths after being boosted to low pressure generation pressure by the second solution pump: one path of the solution is boosted by a first solution pump and heated by a high-temperature solution heat exchanger and then enters a lithium bromide dilute solution inlet of a high-pressure generator, the lithium bromide dilute solution in the high-pressure generator is heated to release steam to form a concentrated lithium bromide solution, and then the concentrated lithium bromide solution enters an absorber lithium bromide concentrated solution inlet after being cooled by the high-temperature solution heat exchanger and reduced in pressure by a first throttle valve to form solution circulation of a heat pump system; heating the other path of lithium bromide dilute solution by a low-temperature solution heat exchanger, respectively entering a first low-pressure generator and a second low-pressure generator, heating the dilute lithium bromide solution in the first low-pressure generator and the second low-pressure generator to release steam to form a concentrated lithium bromide solution, cooling by the low-temperature solution heat exchanger, reducing the pressure by a second throttle valve, and then entering an absorber lithium bromide concentrated solution inlet to form solution circulation of a heat pump; one part of high-pressure circulating working medium steam generated by the high-pressure generator enters the first low-pressure generator as a heating source of the first low-pressure generator, and the other part of the high-pressure circulating working medium steam enters the ejector as working fluid to eject the low-pressure circulating working medium steam generated by the first low-pressure generator and the second low-pressure generator, is mixed by the ejector and then enters the condenser; the saturated cycle working medium water from the condenser is subjected to pressure reduction by a third throttle valve, is absorbed by the evaporator to become saturated steam, then enters an absorber cycle working medium steam inlet to release heat, is absorbed by a concentrated lithium bromide solution in the absorber to become a dilute lithium bromide solution, and starts new cycle; the vertical buried pipe is used for absorbing heat in deep soil and is provided with a first reversing valve, a second reversing valve, a third reversing valve and a fourth reversing valve, so that the device can supply heat in winter and cool in summer; when refrigeration is needed, the first reversing valve and the fourth reversing valve are adjusted to enable water from the cooling tower to pass through the absorber and the condenser in sequence for absorption and then return to the cooling tower for heat release, and the second reversing valve and the third reversing valve are adjusted to enable refrigerant water to enter the evaporator for heat release so as to meet the requirement of a cold load; when heating is needed, the first reversing valve and the fourth reversing valve are adjusted, and the heat supply backwater sequentially passes through the absorber and the condenser to absorb heat, so that the heat load requirement is met.
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