CN115111805A - Cold-heat-electricity combined supply system and method based on deep waste heat utilization - Google Patents
Cold-heat-electricity combined supply system and method based on deep waste heat utilization Download PDFInfo
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- CN115111805A CN115111805A CN202210706819.4A CN202210706819A CN115111805A CN 115111805 A CN115111805 A CN 115111805A CN 202210706819 A CN202210706819 A CN 202210706819A CN 115111805 A CN115111805 A CN 115111805A
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- 239000002918 waste heat Substances 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 140
- 239000003546 flue gas Substances 0.000 claims abstract description 91
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 89
- 238000001816 cooling Methods 0.000 claims abstract description 49
- 238000010521 absorption reaction Methods 0.000 claims abstract description 43
- 239000007789 gas Substances 0.000 claims abstract description 31
- 239000002002 slurry Substances 0.000 claims abstract description 30
- 238000010438 heat treatment Methods 0.000 claims abstract description 26
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 22
- 230000023556 desulfurization Effects 0.000 claims abstract description 22
- 238000010248 power generation Methods 0.000 claims abstract description 15
- 239000006096 absorbing agent Substances 0.000 claims description 22
- 230000003009 desulfurizing effect Effects 0.000 claims description 20
- 238000011084 recovery Methods 0.000 claims description 17
- 238000002485 combustion reaction Methods 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 5
- 238000009833 condensation Methods 0.000 claims description 4
- 230000005494 condensation Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims 2
- 238000001704 evaporation Methods 0.000 abstract description 3
- 230000008020 evaporation Effects 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 239000008400 supply water 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
- 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/06—Flash evaporation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
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Abstract
The invention discloses a combined cooling heating and power system and a combined cooling and power method based on deep waste heat utilization. During heat supply, flue gas discharged in the power generation process of the gas turbine unit is used for heating circulating water of a heat supply network in a stepped mode, the circulating water can be used for directly supplying heat or driving an absorption heat pump unit, the desulfurization slurry waste heat unit recovers the desulfurization slurry waste heat by utilizing the characteristic that the saturation temperature of water is reduced along with the reduction of pressure, the purpose of indirectly and deeply recovering the flue gas waste heat is achieved, the tail flue gas discharge temperature is reduced, and the absorption heat pump unit recovers the flue gas waste heat to realize external heat supply; during cooling, circulating water produced by using the flue gas of the gas turbine unit drives the absorption heat pump unit to supply cooling, deep waste heat utilization of the flue gas is realized by using the flash evaporation device, the working temperature difference of the heat pump is reduced, the heating performance coefficient is improved, and the problems of insufficient waste heat utilization degree, low utilization rate of the flue gas and energy waste in the prior art are solved.
Description
Technical Field
The invention belongs to the technical field of combined heat and power, and relates to a combined heat and cold power system and method based on deep waste heat utilization.
Background
The development position of a comprehensive energy system is gradually improved, energy reform is greatly promoted in partial areas, the energy utilization rate is improved, and the carbon emission index is reduced. The cold, heat and electricity distributed independent energy supply system has the defects of low energy utilization rate, high overall investment cost and the like, and the cold, heat and electricity combined supply system based on the energy gradient utilization principle can solve the problems. The traditional combined cooling heating and power system is generally a power machine with waste heat recovery equipment, but has the problems of insufficient waste heat utilization degree, insufficient energy supply types and the like, the power supply completely depends on the power machine, so that the flexibility is low, the utilization rate of flue gas is low, and the energy waste is caused by higher flue gas emission temperature; meanwhile, the cooling depends on a voltage compression heat pump, so that the electric energy is wasted, the cooling capacity is reduced, the energy utilization rate of the combined supply system is reduced, the energy consumption cost is increased, and how to solve the problems is the primary target in the development process of the combined cooling heating and power system.
Disclosure of Invention
The invention aims to solve the problems of large emission of flue gas and energy waste caused by insufficient waste heat utilization degree and insufficient energy supply types, single power supply mode and low flue gas utilization rate in the prior art, and provides a combined cooling, heating and power supply system and method based on deep waste heat utilization. The photovoltaic and the gas turbine jointly generate power, the flue gas generated by power generation of the gas turbine is used for preparing hot water by sequentially utilizing a waste heat boiler and a flue gas heat exchanger to drive an absorption heat pump or directly supply heat, a low-temperature heat source of an absorption heat pump unit is the waste heat of the desulfurization slurry, a negative-pressure flash tank enables the inside of the desulfurization slurry tank to be subjected to flash evaporation and cooling, and a heat pump extracts latent heat contained in the generated steam, so that the aim of indirectly and deeply recovering the waste heat of the flue gas is fulfilled, and the purpose of supplying heat and power to the outside at the same time is realized; when the load demand of the user side is cold and electric load, the photovoltaic and the gas turbine jointly meet the electric load of the user, and the hot water produced by the waste heat of the flue gas of the gas turbine is used for driving the absorption heat pump to refrigerate, so that the external cold supply and the external power supply are realized at the same time. The desulfurization slurry waste heat recovery system can realize deep recovery of flue gas waste heat, further reduce the exhaust temperature, realize energy cascade utilization, reduce the working temperature difference of a heat pump, improve the heating performance coefficient, and the system is provided with photovoltaic, so that the utilization rate of clean energy of the system is improved, and the energy supply cost and the carbon emission are reduced.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
a combined cooling heating and power system based on deep waste heat utilization comprises a gas turbine unit, a heat supply network backwater main pipe, an absorption heat pump unit, a desulfurizing tower waste heat recovery unit and a cold supply network backwater main pipe;
the flue gas outlet of the gas turbine unit is sequentially connected with the flue gas inlets of the waste heat boiler and the flue gas heat exchanger, and the flue gas outlet of the flue gas heat exchanger is connected with the flue gas inlet of the desulfurization slurry waste heat recovery unit;
the heat supply network water return main pipe is divided into two paths, one path is connected with a water side inlet of the smoke heat exchanger, the other path is connected with a hot side inlet of the absorption heat pump unit, a hot side outlet of the absorption heat pump unit is respectively connected with an inlet of the cooling tower and the heat supply network water supply main pipe, a water side outlet of the smoke heat exchanger is connected with a water side inlet of the waste heat boiler, a water side outlet of the waste heat boiler is divided into two paths, one path is connected with the heat supply network water supply main pipe, and the other path is connected with the water side inlet of the waste heat boiler through the water side inlet of the absorption heat pump unit;
and the cold side outlets of the absorption heat pump unit are respectively connected with the chilled water supply main pipe and the water side inlet of the desulfurization tower waste heat recovery unit.
The invention is further improved in that:
the desulfurization tower waste heat recovery unit comprises a desulfurization tower and a flash tank;
the flue gas inlet of the desulfurizing tower is connected with the flue gas outlet of the flue gas heat exchanger, the slurry outlet of the desulfurizing tower is connected with the slurry inlet of the flash tank, the steam side inlet of the flash tank is connected with the cold side inlet of the absorption heat pump unit, the cold side outlet of the absorption heat pump unit is connected with the cold side inlet of the flash tank, and the water side outlet of the flash tank is connected with the water side inlet of the desulfurizing tower.
And a condensation water tank is arranged at the inlet of the cold side of the flash tank.
And a slurry spraying pump is arranged between the slurry outlet of the desulfurization tower and the slurry inlet of the flash tank, and a slurry water returning pump is arranged between the water side outlet of the flash tank and the water side inlet of the desulfurization tower.
And the flash tank is connected with a vacuum pump.
The power output end of the gas turbine unit is connected with the power input end of the distribution box, the power input end of the distribution box is also connected with the output end of the photovoltaic power generation unit, and the gas turbine unit and the photovoltaic power generation unit realize power supply of users and systems through the distribution box.
The gas turbine unit comprises a gas compressor, a heat regenerator, a combustion chamber, a turbine and a generator;
the flue gas outlet of the gas compressor is sequentially connected with a first side flue gas inlet of the heat regenerator, a combustion chamber flue gas inlet, a turbine flue gas inlet and a second side flue gas inlet of the heat regenerator, and the second side flue gas outlet of the heat regenerator is connected with a flue gas inlet of the waste heat boiler; the compressor, the turbine and the generator are coaxially connected.
The absorption heat pump unit comprises a generator, a solution heat exchanger, an absorber, an evaporator and a condenser;
the heat supply network water return main pipe is sequentially connected with the absorber and a hot side inlet of the condenser, a hot side outlet of the condenser is divided into two paths, one path is connected with an inlet of the cooling tower, the other path is connected with the heat supply network water supply main pipe, an outlet of the cooling tower is connected with the hot side inlet of the absorber, and a condensed water outlet of the condenser is connected with a condensed water inlet of the evaporator; a water side outlet of the waste heat boiler is connected with a water side inlet of the waste heat boiler through a water side inlet of the generator; the steam side outlet of the generator is connected with the steam side inlet of the condenser, the solution outlet is sequentially connected with the first solution inlet of the solution heat exchanger, the solution inlet of the absorber and the second solution inlet of the solution heat exchanger, and the second solution outlet of the solution heat exchanger is connected with the solution inlet of the generator.
A first expansion valve is arranged between the solution outlet of the generator and the first solution inlet of the solution heat exchanger, and a solution pump is arranged between the second solution outlet of the solution heat exchanger and the solution inlet of the generator.
A combined cooling heating and power supply method based on deep waste heat utilization comprises the following steps:
when heat is supplied, the return water of the heat supply network is divided into two paths, one path of return water enters the waste heat boiler and the flue gas heat exchanger in sequence, exchanges heat with the flue gas and then converges to the main water supply pipe of the heat supply network; the other path of the heat exchange water enters an absorption heat pump unit, steam generated by the desulfurization tower waste heat recovery unit enters the absorption heat pump unit and exchanges heat with heat supply network water entering the absorption heat pump unit, one path of the heat supply network water after heat absorption is converged to a heat supply network water main pipe, the other path of the heat supply network water enters a cooling tower for cooling, and the cooled heat supply network water returns to the absorption heat pump unit;
when cooling is carried out, chilled water of the cold net return water main pipe enters the absorption heat pump unit for heat exchange, and the chilled water after cooling is converged to the cold net water supply main pipe.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses a combined cooling heating and power system based on deep waste heat utilization, which is characterized in that hot water is prepared by flue gas of a gas turbine unit and is used for driving an absorption heat pump unit, partial flue gas drives a desulfurizing tower waste heat recovery unit to absorb the waste heat of the flue gas, the generated heat is used as a low-temperature heat source of the absorption heat pump unit, the cascade utilization of energy is realized, meanwhile, the additionally arranged desulfurizing tower waste heat recovery unit realizes the purpose of indirectly and deeply recovering the waste heat of the flue gas by absorbing the waste heat of the flue gas, the temperature of the flue gas is further reduced, the utilization rate of the waste heat energy source is improved, meanwhile, partial condensed water with better quality can be recovered, the condensed water can be used for supplementing water by a heat network, the temperature of the low-temperature heat source of a heat pump is improved, the heating performance coefficient is improved, the heating capacity of the system is improved, and the fuel consumption is reduced. The method has stronger adaptability and flexibility in the face of variable load requirements of the user side.
Furthermore, the desulfurization tower waste heat recovery unit comprises a desulfurization tower and a flash tank, the flash tank recovers the desulfurization slurry waste heat to achieve the purpose of indirectly and deeply recovering the flue gas waste heat, the tail flue gas emission temperature is reduced, the generated waste heat is absorbed by the absorption heat pump unit to realize external heat supply, the low-temperature heat source temperature of the heat pump is increased, the working temperature difference of the heat pump is reduced, and the heating performance coefficient is increased.
Furthermore, the photovoltaic power generation unit is established and efficiently coupled with the gas turbine unit, so that the power consumption of system equipment and the electric load of a user are fully met, the utilization rate of clean energy is improved, and the flexibility of the system is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a system block diagram of the present invention.
Wherein: 1, an air compressor; 2-a heat regenerator; 3-a combustion chamber; 4-turbine; 5-a generator; 6, a waste heat boiler; 7-flue gas heat exchanger; 8-a desulfurizing tower; 9-a first electric regulating valve; 10-a first ball valve; 11-a second ball valve; 12-a second electrically actuated regulator valve; 13-a third ball valve; 14-a fourth ball valve; 15-a third electric control valve; 16-a fifth ball valve; 17-a sixth ball valve; 18-a fourth electrically actuated regulator valve; 19-a seventh ball valve; 20-a generator; 21-a solution pump; 22-a first expansion valve; 23-solution heat exchanger; 24-an absorber; 25-an evaporator; 26-a second expansion valve; 27-a condenser; 28-vacuum pump; 29-flash tank; 30-a first electrically operated stop valve; 31-a second electrically powered stop valve; 32-condensation water tank; 33-a condensate pump; 34-slurry water withdrawal pump; 35-slurry spray pump; 36-solar photovoltaic panel; 37-an inverter; 38-a distribution box; 39-eighth ball valve; 40-a ninth ball valve; 41-tenth ball valve; 42-eleventh ball valve; 43-twelfth ball valve; 44-a cooling tower; 45-cooling water circulation pump; 46-a thirteenth ball valve; 47-heat supply network circulating water pump.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually arranged when the product of the present invention is used, the description is merely for convenience and simplicity, and the indication or suggestion that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, cannot be understood as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
Furthermore, the term "horizontal", if present, does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, the invention discloses a combined cooling heating and power system based on deep waste heat utilization, the power supply side of the system is composed of a gas turbine power generation system and a photovoltaic power generation system, the gas turbine is used as supplement of the insufficient part of the photovoltaic power generation, and simultaneously, one part of the power generation of the gas turbine and the photovoltaic power generation is used for the power consumption of power consumption equipment such as a circulating water pump, a vacuum pump and the like in the system; flue gas discharged in the power generation process of the combined heat and power mode gas turbine is used for heating circulating water of a heat supply network in a stepped mode, the circulating water can be used for directly supplying heat or driving an absorption heat pump, a desulfurization slurry waste heat utilization system utilizes the characteristic that the saturation temperature of water is reduced along with the reduction of pressure, the waste heat of desulfurization slurry is recovered to achieve the aim of indirectly and deeply recovering the waste heat of the flue gas, the discharge temperature of the tail flue gas is reduced, and the heat pump recovers the waste heat of the flue gas to realize external heat supply; and in the combined cooling and power mode, circulating water prepared by using the flue gas of the gas turbine is used for driving the absorption heat pump to supply cooling. The flash evaporation device is utilized to realize deep waste heat utilization of the flue gas, meanwhile, the temperature of the low-temperature heat source of the heat pump is increased, the working temperature difference of the heat pump is reduced, and the heating performance coefficient is increased.
The method specifically comprises the following components:
a compressor 1; a heat regenerator 2; a combustion chamber 3; a turbine 4; a generator 5; a waste heat boiler 6; 7-flue gas heat exchanger 7; a desulfurizing tower 8; a first electric regulator valve 9; a first ball valve 10; a second ball valve 11; a second electric regulator valve 12; a third ball valve 13; a fourth ball valve 14; a third electrical regulator valve 15; a fifth ball valve 16; a sixth ball valve 17; a fourth electric regulator valve 18; a seventh ball valve 19; a generator 20; a solution pump 21; the first expansion valve 22; a solution heat exchanger 23; an absorber 24; an evaporator 25; a second expansion valve 26; a condenser 27; a vacuum pump 28; a flash tank 29; a first electric shutoff valve 30; the second electric shutoff valve 31; a condensation water tank 32; a condensate pump 33; a slurry withdrawal pump 34; a slurry spray pump 35; a solar photovoltaic panel 36; an inverter 37; a distribution box 38; an eighth ball valve 39; a ninth ball valve 40; a tenth ball valve 41; an eleventh ball valve 42; a twelfth ball valve 43; a cooling tower 44; a cooling water circulation pump 45; a thirteenth ball valve 46 and a heat supply network circulating water pump 47.
The connection structure of the embodiment of the invention is that a flue gas outlet of a gas compressor 1 is connected with a first flue gas inlet of a heat regenerator 2, the first flue gas outlet of the heat regenerator 2 is connected with a flue gas inlet of a combustion chamber 3, the flue gas inlet of the combustion chamber 4 is connected with a flue gas inlet of a turbine 4, the flue gas outlet of the turbine 4 is connected with a second flue gas inlet of the heat regenerator 2, the second flue gas outlet of the turbine 2 is connected with a flue gas inlet of a waste heat boiler 6, the flue gas outlet of the waste heat boiler 6 is connected with a flue gas inlet of a flue gas heat exchanger 7, and the flue gas outlet of the flue gas heat exchanger 7 is connected with a flue gas inlet of a desulfurizing tower 8. The compressor 1, the turbine 4 and the generator 5 are coaxially arranged, the output end of the generator 5 is connected with the input end of the distribution box 8, the power output end of the solar photovoltaic panel 36 is connected with the inverter 37, the output end of the inverter 37 is connected with the input end of the distribution box 38, and the distribution box 38 is used for supplying power to systems and users.
The heat supply network backwater main pipe is divided into two paths:
the first path is connected with a water side inlet of the flue gas heat exchanger 7, a water side outlet of the flue gas heat exchanger 7 is connected with a water side inlet of the waste heat boiler 6, a water side outlet of the waste heat boiler 6 is divided into two paths, the first path is connected with a heat supply network water supply main pipe, the second path is connected with a water side inlet of the generator 20, and a water side outlet of the generator 20 is connected with a water side inlet of the waste heat boiler 6.
The second path is connected with a hot side inlet of the absorber 24, a hot side outlet of the absorber 24 is connected with a hot side inlet of the condenser 27, the hot side outlet of the condenser 27 is divided into two paths, one path is connected with a heat supply network water supply main pipe, the other path is connected with an inlet of the cooling tower 44, and an outlet of the cooling tower 44 is connected with the hot side inlet of the absorber 24.
The low-temperature heat source heat supply unit of the system comprises a desulfurizing tower 8, a slurry outlet of the desulfurizing tower 8 is connected with a slurry inlet of a flash tank 29, a steam outlet of the flash tank 29 is connected with a cold-side inlet of an evaporator 25, and a steam outlet of the evaporator 25 is connected with a steam inlet of an absorber 24. Meanwhile, the condensed water outlet of the evaporator 25 is divided into two paths, one path is connected with the cold net water supply main pipe, the other path is connected with the flash tank 29, and the inlet of the flash tank 29 is connected with the condensed water tank 32 through a second electric stop valve 31 and used for recovering the redundant condensed water in the flash tank 29.
In the embodiment of the invention, the absorption heat pump unit comprises a solution outlet of a generator 20, a solution inlet at the first side of a solution heat exchanger 23 is connected through a first expansion valve 22, the solution exchanges heat with dilute solution in the solution heat exchanger 23, the solution after heat exchange enters a solution inlet of an absorber 24 through the solution outlet at the first side of the solution heat exchanger 23, the solution after heat exchange is connected with a solution inlet at the second side of the solution heat exchanger 23 through the solution outlet of the absorber 24 after high-temperature steam is absorbed by the absorber 24, then the solution returns to the generator 20 through the solution outlet of the solution heat exchanger 23 and a solution pump 21 to realize circulation, steam generated in the generator 20 enters a condenser 27, the steam exchanges heat with heat supply network water from the absorber 24 to generate condensed water in the condenser 27, the condensed water enters an evaporator 24 through a condensed water outlet of the condenser 27 and exchanges heat with low-temperature heat supply network water or cold network backwater in the evaporator 24, the steam generated by the heat exchange enters the evaporator 24, and the generated condensed water returns to the flash tank 29 and the cold net water supply main pipe respectively.
The working principle of the embodiment of the invention is as follows:
during heat supply:
the solar photovoltaic panel 36 and the gas turbine unit jointly generate power to meet the power consumption requirements of system power consumption equipment and users, and the power generation amount of the solar photovoltaic panel and the power generation amount of the gas turbine unit are distributed by the power distribution cabinet 8;
the exhaust gas of the gas turbine unit is sequentially heated by a waste heat boiler 6 and a flue gas heat exchanger 7 to heat the circulating water of the heat supply network, and then is desulfurized by a desulfurizing tower 8 and then is discharged; one path of the heat supply network circulating water of the heat supply network water return main pipe sequentially passes through the second ball valve 11, the first electric regulating valve 9 and the flue gas heat exchanger 7, the first ball valve 10 and the waste heat boiler 6, one part of the heated heat supply network water return is used for direct heat supply through the third electric regulating valve 15 and the fifth ball valve 16, one part of the heated heat supply network water return enters the generator 20 through the fourth ball valve 14 and is used for driving the absorption heat pump, and the heat supply network water after heat exchange returns to the waste heat boiler 6 through the third ball valve 13 to realize the circulating driving of the heat supply network water; the other path of circulating water in the heat supply network water return main pipe sequentially passes through a sixth ball valve 17 and a fourth electric regulating valve 18 to enter an absorber 24 for absorption, and the absorbed circulating water sequentially passes through a condenser 27 and a seventh ball valve 19 and then returns to the heat supply network water supply main pipe; the slurry in the desulfurizing tower absorbs the heat of the flue gas and then enters the flash tank 29 through the slurry spray pump 35 for spray cooling, the flash tank 29 is provided with the vacuum pump 28, high-temperature steam generated in the flash tank 29 is used as a low-temperature heat source and enters the evaporator 25 in the absorption heat pump unit through the eighth ball valve 39 for heat exchange, the heat is absorbed by circulating water of a heat supply network in the absorption heat pump unit and used for heat supply of the heat supply network, the indirect deep recovery of the waste heat of the flue gas is realized, the generated condensed water returns to the flash tank 29 through the ninth ball valve 40, the condensed water pump 33 and the first electric stop valve 30, the slurry after cooling in the condensed water tank returns to the desulfurizing tower 8 through the slurry return pump 34, and the condensed water in the flash tank 29 enters the condensed water tank 32 through the second electric stop valve 31.
When cooling is performed:
chilled water in the chilled water return water main pipe enters the condenser 27 through the eleventh ball valve 42 to release heat and cool, and then returns to the cold net water supply main pipe through the tenth ball valve 41 to supply water, steam generated by heat exchange and cooling of the chilled water return water in the condenser 27 enters the absorber 24, circulating water in the absorber 24 absorbs heat and then enters the cooling tower 44 through the condenser 27 and the twelfth ball valve 43 to cool, and the cooled circulating water returns to the absorber 24 through the cooling water circulating pump 45 and the thirteenth ball valve 46 in sequence, so that chilled water circulation is realized.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A combined cooling heating and power system based on deep waste heat utilization is characterized by comprising a gas turbine unit, a heat supply network backwater main pipe, an absorption heat pump unit, a desulfurizing tower waste heat recovery unit and a cold supply network backwater main pipe;
the flue gas outlet of the gas turbine unit is sequentially connected with the flue gas inlets of the waste heat boiler (6) and the flue gas heat exchanger (7), and the flue gas outlet of the flue gas heat exchanger (7) is connected with the flue gas inlet of the desulfurization slurry waste heat recovery unit;
the heat supply network water return main pipe is divided into two paths, one path is connected with a water side inlet of the flue gas heat exchanger (7), the other path is connected with a hot side inlet of the absorption heat pump unit, a hot side outlet of the absorption heat pump unit is respectively connected with an inlet of the cooling tower (44) and the heat supply network water supply main pipe, a water side outlet of the flue gas heat exchanger (7) is connected with a water side inlet of the waste heat boiler (6), a water side outlet of the waste heat boiler (6) is divided into two paths, one path is connected with the heat supply network water supply main pipe, and the other path is connected with the water side inlet of the waste heat boiler (6) through the water side inlet of the absorption heat pump unit;
and the cold side outlets of the absorption heat pump unit are respectively connected with the chilled water supply main pipe and the water side inlet of the desulfurization tower waste heat recovery unit.
2. The combined cooling, heating and power system based on deep waste heat utilization according to claim 1, wherein the desulfurizing tower waste heat recovery unit comprises a desulfurizing tower (8) and a flash tank (29);
the flue gas inlet of desulfurizing tower (8) connects the exhanst gas outlet of flue gas heat exchanger (7), the thick liquid exit linkage of desulfurizing tower (8) flash tank (29) the thick liquid entry of flash tank, and the steam side entry linkage of flash tank (29) absorbs the cold side entry of heat pump unit, the cold side exit linkage of absorption heat pump unit the cold side entry of flash tank (29), and the water side exit linkage of flash tank (29) the water side entry of desulfurizing tower (8).
3. The combined cooling, heating and power system based on deep waste heat utilization according to claim 3, characterized in that a condensation water tank (32) is arranged at a cold side inlet of the flash tank (29).
4. The combined cooling, heating and power system based on deep waste heat utilization according to claim 3, wherein a slurry spray pump (35) is arranged between the slurry outlet of the desulfurization tower (8) and the slurry inlet of the flash tank (29), and a slurry water return pump (34) is arranged between the water side outlet of the flash tank (29) and the water side inlet of the desulfurization tower (3).
5. The combined cooling, heating and power system based on deep waste heat utilization according to claim 3, characterized in that a vacuum pump (28) is connected to the flash tank (29).
6. The combined cooling, heating and power system based on deep waste heat utilization according to claim 1, wherein the power output end of the gas turbine unit is connected with the power input end of the distribution box (8), the power input end of the distribution box (8) is further connected with the output end of the photovoltaic power generation unit, and the gas turbine unit and the photovoltaic power generation unit realize power supply for users and systems through the distribution box (8).
7. The combined cooling, heating and power system based on deep waste heat utilization according to claim 1, wherein the gas turbine unit comprises a compressor (1), a regenerator (2), a combustion chamber (3), a turbine (4) and a generator (5);
a flue gas outlet of the compressor (1) is sequentially connected with a first side flue gas inlet of the heat regenerator (2), a flue gas inlet of the combustion chamber (3), a flue gas inlet of the turbine (4) and a second side flue gas inlet of the heat regenerator (2), and a second side flue gas outlet of the heat regenerator (2) is connected with a flue gas inlet of the waste heat boiler (6); the compressor (1), the turbine (4) and the generator (5) are coaxially connected.
8. The combined cooling, heating and power system based on deep waste heat utilization according to claim 1, wherein the absorption heat pump unit comprises a generator (20), a solution heat exchanger (23), an absorber (24), an evaporator (25) and a condenser (27);
the heat supply network water return main pipe is sequentially connected with an absorber (24) and a hot side inlet of a condenser (27), a hot side outlet of the condenser (27) is divided into two paths, one path is connected with an inlet of a cooling tower (44), the other path is connected with a heat supply network water supply main pipe, an outlet of the cooling tower (44) is connected with the hot side inlet of the absorber (24), and a condensed water outlet of the condenser (27) is connected with a condensed water inlet of an evaporator (25); a water side outlet of the waste heat boiler (6) is connected with a water side inlet of the waste heat boiler (6) through a water side inlet of the generator (20); the steam side outlet of the generator (20) is connected with the steam side inlet of the condenser (27), the solution outlet is sequentially connected with the first solution inlet of the solution heat exchanger (23), the solution inlet of the absorber (24) and the second solution inlet of the solution heat exchanger (23), and the second solution outlet of the solution heat exchanger (23) is connected with the solution inlet of the generator (20).
9. The combined cooling, heating and power system based on deep waste heat utilization according to claim 8, wherein a first expansion valve (22) is arranged between the solution outlet of the generator (20) and the first solution inlet of the solution heat exchanger (23), and a solution pump (21) is arranged between the second solution outlet of the solution heat exchanger (23) and the solution inlet of the generator (20).
10. The combined cooling, heating and power method based on deep waste heat utilization according to claim 1, characterized by comprising the following steps:
when heat is supplied, the return water of the heat supply network is divided into two paths, one path of the return water enters the waste heat boiler (6) and the flue gas heat exchanger (7) in sequence to exchange heat with the flue gas and then is converged to the heat supply network water supply main pipe; the other path of the heat exchange water enters an absorption heat pump unit, steam generated by the desulfurization tower waste heat recovery unit enters the absorption heat pump unit and exchanges heat with heat supply network water entering the absorption heat pump unit, one path of the heat supply network water after heat absorption is converged to a heat supply network water main pipe, the other path of the heat supply network water enters a cooling tower (44) for cooling, and the cooled heat supply network water returns to the absorption heat pump unit;
when cooling is carried out, chilled water of the cold net return water main pipe enters the absorption heat pump unit for heat exchange, and the chilled water after cooling is converged to the cold net water supply main pipe.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101858231A (en) * | 2010-04-07 | 2010-10-13 | 清华大学 | Energy supply system mainly through gas and steam combined cycle cogeneration |
| CN101929759A (en) * | 2009-06-25 | 2010-12-29 | 清华大学 | Absorption heating and refrigerating all-in-one machine taking high-temperature gas as heat source |
| CN104697238A (en) * | 2015-02-12 | 2015-06-10 | 清华大学 | Energy storage type thermoelectric combined cooling and power device suitable for active power distribution network and running method of energy storage type thermoelectric combined cooling and power device |
| CN109945278A (en) * | 2019-03-25 | 2019-06-28 | 大连理工大学 | A kind of energy conserving system being used for central heating using absorption heat pump depth Mist heat recovering |
| CN110425902A (en) * | 2019-08-26 | 2019-11-08 | 华能国际电力股份有限公司 | Flue gas waste heat recycling system and method after wet desulphurization |
| CN113834114A (en) * | 2021-06-04 | 2021-12-24 | 华能伊春热电有限公司 | Heating system and method of negative-pressure flash evaporation coupling two-stage compression variable-frequency heat pump |
| CN114111094A (en) * | 2021-11-30 | 2022-03-01 | 中国华能集团清洁能源技术研究院有限公司 | Desulfurization slurry waste heat recovery device utilizing unit steam extraction and absorption heat pump |
-
2022
- 2022-06-21 CN CN202210706819.4A patent/CN115111805A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101929759A (en) * | 2009-06-25 | 2010-12-29 | 清华大学 | Absorption heating and refrigerating all-in-one machine taking high-temperature gas as heat source |
| CN101858231A (en) * | 2010-04-07 | 2010-10-13 | 清华大学 | Energy supply system mainly through gas and steam combined cycle cogeneration |
| CN104697238A (en) * | 2015-02-12 | 2015-06-10 | 清华大学 | Energy storage type thermoelectric combined cooling and power device suitable for active power distribution network and running method of energy storage type thermoelectric combined cooling and power device |
| CN109945278A (en) * | 2019-03-25 | 2019-06-28 | 大连理工大学 | A kind of energy conserving system being used for central heating using absorption heat pump depth Mist heat recovering |
| CN110425902A (en) * | 2019-08-26 | 2019-11-08 | 华能国际电力股份有限公司 | Flue gas waste heat recycling system and method after wet desulphurization |
| CN113834114A (en) * | 2021-06-04 | 2021-12-24 | 华能伊春热电有限公司 | Heating system and method of negative-pressure flash evaporation coupling two-stage compression variable-frequency heat pump |
| CN114111094A (en) * | 2021-11-30 | 2022-03-01 | 中国华能集团清洁能源技术研究院有限公司 | Desulfurization slurry waste heat recovery device utilizing unit steam extraction and absorption heat pump |
Non-Patent Citations (1)
| Title |
|---|
| 王洪利等: "《太阳能吸收式热泵性能及经济性评价》", 冶金工业出版社, pages: 70 - 71 * |
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