CN113417703A - Solar wet helium turbine circulation electricity-water-salt three-coproduction zero-emission system and method - Google Patents
Solar wet helium turbine circulation electricity-water-salt three-coproduction zero-emission system and method Download PDFInfo
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- CN113417703A CN113417703A CN202110599657.4A CN202110599657A CN113417703A CN 113417703 A CN113417703 A CN 113417703A CN 202110599657 A CN202110599657 A CN 202110599657A CN 113417703 A CN113417703 A CN 113417703A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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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
- C02F1/14—Treatment of water, waste water, or sewage by heating by distillation or evaporation using solar energy
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
- F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/138—Water desalination using renewable energy
- Y02A20/142—Solar thermal; Photovoltaics
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
- Y02A20/208—Off-grid powered water treatment
- Y02A20/212—Solar-powered wastewater sewage treatment, e.g. spray evaporation
Abstract
The invention discloses a solar wet helium turbine circulation electricity-water-salt three-coproduction zero-emission system and method, and belongs to the field of power generation, evaporative crystallization, desalination and water production. The system comprises a solar wet helium turbine circulation subsystem and a crystallization water production subsystem; the solar wet helium turbine circulation subsystem comprises a hot molten salt tank, a cold molten salt tank, a solar heat collector, a helium heater, a saturator, a helium turbine and a generator; the crystallization water production subsystem mainly comprises a stirrer, a centrifuge, a solution preheater and a heat pump cycle. The invention combines the power generation system with the desalination water production process, utilizes solar energy to heat the wet helium gas for power generation, can fully recover the waste heat of the wet helium gas for preheating the inlet solution, and uses the heat pump system to heat, evaporate, cool and crystallize the solution, thereby simultaneously realizing the requirements of power generation and desalination water production. The system has obvious energy-saving effect and meets the strategic targets of national energy conservation, emission reduction and sustainable development.
Description
Technical Field
The invention designs a solar wet helium turbine circulation electricity-water-salt three-coproduction zero-emission system and a method, and belongs to the field of power generation, evaporative crystallization, desalination and water production.
Background
Helium is used as a coolant, has stable chemical property and good heat conduction performance, and is commonly used for shutdown cooling of a high-temperature gas cooled nuclear reactor in helium turbine circulation. Compared with pure helium, the wet helium carrying the water vapor increases working media in the gas turbine, increases effective output power, reduces consumption of compression power and improves cycle performance.
With the development of society and the increase of human activities, the demand of human beings for fresh water is increasing day by day, and therefore, the technology of fresh water production becomes a research hotspot. The traditional desalination technology comprises a distillation method, a refrigeration method, a flash evaporation method, a reverse osmosis method and the like, but the operation and maintenance cost is relatively high, and the large-scale application is not facilitated; in addition, in the conventional desalination technology, more than 6% of seawater concentrated is directly discharged, and the surrounding ecological environment is seriously damaged, so that the development of an energy-saving, high-efficiency and zero-pollution fresh water production system is imperative.
In order to realize the purpose of zero emission, a fresh water production system and an evaporative crystallization system are combined, and solar energy is used for pushing a wet helium turbine to circularly generate electricity, and the aims of fresh water production and concentrated crystallization are realized at the same time. The electricity-water-salt three-generation system has obvious energy-saving effect and meets the strategic targets of national energy conservation, emission reduction and sustainable development.
Disclosure of Invention
The invention aims to provide a solar wet helium turbine circulating electricity-water-salt three-coproduction zero-emission system and method.
The utility model provides a solar energy wet helium turbine circulation electricity salt triple generation zero discharge system, includes solar energy wet helium circulation turbine subsystem and crystallization product water subsystem, its characterized in that:
the solar wet helium turbine circulation subsystem comprises a hot molten salt tank, a cold molten salt tank, a solar heat collector, a helium heater, a saturator, a helium compressor, a generator and a helium turbine;
the outlet of the cold molten salt tank of the solar wet helium turbine circulation subsystem is connected with the inlet of the solar heat collector, the outlet of the solar heat collector is connected with the inlet of the hot molten salt tank, the outlet of the hot molten salt tank is connected with the inlet of the hot side of the helium heater, the outlet of the hot side of the helium heater is connected with the inlet of the cold molten salt tank, the inlet of the cold side of the helium heater is connected with the wet helium outlet at the top of the saturator, the outlet of the cold side of the helium heater is connected with the inlet of the helium turbine, the helium turbine drives the generator to operate, the wet helium inlet at the bottom of the saturator is connected with the outlet of the helium compressor, the inlet of the helium compressor is connected with the helium outlet at the top of the solution preheater, the helium inlet at the bottom of the solution preheater is connected with the helium outlet of the helium turbine, and the water outlet at the bottom of the solution preheater is connected with the outside.
Wherein the crystallization water production subsystem comprises the saturator, a throttle valve I, a solution cooler, a solution heater, a compressor, a stirrer, a centrifuge, a throttle valve II, a solution preheater and a solution pump;
an inlet of a throttling valve I of the crystallization water production subsystem is connected with a solution outlet at the bottom of the saturator, an outlet of the throttling valve I is connected with a hot-side inlet of the solution cooler, the hot-side outlet of the solution cooler is connected with an inlet of a stirrer, a solution outlet of the stirrer is connected with an inlet of a solution pump, a crystal slurry outlet of the stirrer is connected with a crystal slurry inlet of a centrifuge, a crystal outlet of the centrifuge is connected with the outside, and a mother liquor outlet of the centrifuge is connected with the inlet of the solution pump; the outlet of the cold side of the solution cooler is connected with the inlet of the compressor, the outlet of the compressor is connected with the inlet of the hot side of the solution heater, the outlet of the hot side of the solution heater is connected with the inlet of the throttle valve II, and the outlet of the throttle valve II is connected with the inlet of the cold side of the solution cooler; the solution outlet at the bottom of the solution preheater is connected with the inlet of a solution pump, the outlet of the solution pump is connected with the cold side inlet of the solution heater, and the cold side outlet of the solution heater is connected with the solution inlet at the top of the saturator.
A working method of a solar wet helium turbine circulation electricity-water-salt three-coproduction zero-emission system is characterized by comprising the following working processes:
in the solar wet helium turbine circulation subsystem, cold molten salt in a cold molten salt tank absorbs solar energy in a solar heat collector and then enters the hot molten salt tank to store heat, hot molten salt in the hot molten salt tank releases heat to the hot side of a helium heater, and cooled molten salt returns to the cold molten salt tank again to complete molten salt heat circulation; and the wet helium gas after heat release is condensed in the solution preheater, is pressurized by a helium compressor and then is introduced into the tower from the bottom of the saturator, and generates a heat and mass transfer process with the total solution flow entering from the top of the saturator, the heated wet helium gas continuously enters the cold side of the helium heater to exchange heat with molten salt at the hot side, and finally enters a helium turbine to expand and work to drive the generator to work.
In a crystallization water production subsystem, a solution flows through a solution pump, is pressurized and then enters a solution heater, absorbs a low-boiling point working medium therein, releases heat, enters from the top of a saturator, generates a heat and mass transfer process with wet helium gas entering from the bottom of the saturator, is depressurized by a throttle valve I, flows to the hot side of a solution cooler, releases heat to the low-boiling point working medium in the circulation of the heat pump to become a supersaturated solution, then enters a stirrer to form a crystal slurry, and the crystal slurry continuously enters a centrifuge for separation, so that crystals are obtained; the solution at the outlet of the centrifuge and the stirrer is converged with the solution preheated by the solution preheater, enters a solution pump as the total solution flow to be boosted, and then flows into the cold side of the solution heater; the low boiling point working medium in the heat pump cycle absorbs the energy of the hot side of the working medium in the solution cooler and then becomes low-temperature low-pressure steam, the low-temperature low-pressure steam is compressed to a high-temperature high-pressure state by a compressor, then the low-temperature low-pressure steam is introduced into the hot side of the solution heater, releases heat to the total solution flow and is condensed into a liquid state, the pressure of the low-boiling point working medium is reduced by a throttle valve II, and then the low-temperature low-pressure steam enters the solution cooler again to complete the sub-cycle of the heat pump; and wet helium gas from the outlet of the helium turbine enters from the bottom of the solution preheater and performs a countercurrent heat exchange process with the solution entering from the top of the solution preheater, and water vapor carried by the wet helium gas is condensed and accumulated at the bottom of the solution preheater and is led to the outside by a pipeline, so that fresh water is obtained.
Drawings
FIG. 1 is a flow chart of a solar wet helium turbine cycle electricity-water-salt three-generation zero-emission system provided by the invention;
number designation in the figures: 1-hot melt salt tank; 2-cold molten salt tank; 3-a solar heat collector; 4-helium gas heater; 5-a saturator; 6-throttle valve I; 7-solution cooler; 8-helium compressor; 9-solution heater; 10-a compressor; 11-a stirrer; 12-a centrifuge; 13-a throttle valve II; 14-solution preheater; 15-a generator; 16-a helium turbine; 17-solution pump.
Detailed description of the invention
Fig. 1 is a flow chart of a solar wet helium turbine cycle electricity-water-salt three-generation zero-emission system provided by the invention, and the working process of the system is described with reference to fig. 1:
in the solar wet helium turbine circulation subsystem, cold molten salt in a cold molten salt tank absorbs solar energy in a solar heat collector and then enters the hot molten salt tank to store heat, hot molten salt in the hot molten salt tank releases heat to the hot side of a helium heater, and cooled molten salt returns to the cold molten salt tank again to complete molten salt heat circulation; and the wet helium gas after heat release is condensed in the solution preheater, is pressurized by a helium compressor and then is introduced into the tower from the bottom of the saturator, and generates a heat and mass transfer process with the total solution flow entering from the top of the saturator, the heated wet helium gas continuously enters the cold side of the helium heater to exchange heat with molten salt at the hot side, and finally enters a helium turbine to expand and work to drive the generator to work.
In a crystallization water production subsystem, a solution flows through a solution pump, is pressurized and then enters a solution heater, absorbs a low-boiling point working medium therein, releases heat, enters from the top of a saturator, generates a heat and mass transfer process with wet helium gas entering from the bottom of the saturator, is depressurized by a throttle valve I, flows to the hot side of a solution cooler, releases heat to the low-boiling point working medium in the circulation of the heat pump to become a supersaturated solution, then enters a stirrer to form a crystal slurry, and the crystal slurry continuously enters a centrifuge for separation, so that crystals are obtained; the solution at the outlet of the centrifuge and the stirrer is converged with the solution preheated by the solution preheater, enters a solution pump as the total solution flow to be boosted, and then flows into the cold side of the solution heater; the low boiling point working medium in the heat pump cycle absorbs the energy of the hot side of the working medium in the solution cooler and then becomes low-temperature low-pressure steam, the low-temperature low-pressure steam is compressed to a high-temperature high-pressure state by a compressor, then the low-temperature low-pressure steam is introduced into the hot side of the solution heater, releases heat to the total solution flow and is condensed into a liquid state, the pressure of the low-boiling point working medium is reduced by a throttle valve II, and then the low-temperature low-pressure steam enters the solution cooler again to complete the sub-cycle of the heat pump; and wet helium gas from the outlet of the helium turbine enters from the bottom of the solution preheater and performs a countercurrent heat exchange process with the solution entering from the top of the solution preheater, and water vapor carried by the wet helium gas is condensed and accumulated at the bottom of the solution preheater and is led to the outside by a pipeline, so that fresh water is obtained.
Claims (2)
1. The utility model provides a solar energy wet helium turbine circulation electricity salt triple generation zero discharge system, includes solar energy wet helium turbine subsystem and crystallization product water subsystem, its characterized in that:
the solar wet helium turbine circulation subsystem comprises a hot molten salt tank (1), a cold molten salt tank (2), a solar heat collector (3), a helium heater (4), a saturator (5), a helium compressor (8), a generator (15) and a helium turbine (16);
an outlet of a cold molten salt tank (2) of the solar wet helium turbine circulation subsystem is connected with an inlet of a solar heat collector (3), an outlet of the solar heat collector (3) is connected with an inlet of a hot molten salt tank (1), an outlet of the hot molten salt tank (1) is connected with a hot side inlet of a helium heater (4), and a hot side outlet of the helium heater (4) is connected with an inlet of the cold molten salt tank (2); a cold side inlet of the helium heater (4) is connected with a wet helium outlet at the top of the saturator (5), a cold side outlet of the helium heater (4) is connected with an inlet of a helium turbine (16), the helium turbine drives a generator (15) to operate, a wet helium inlet at the bottom of the saturator (5) is connected with an outlet of a helium compressor (8), an inlet of the helium compressor (8) is connected with a helium outlet at the top of the solution preheater (14), a helium inlet at the bottom of the solution preheater (14) is connected with a helium outlet of the helium turbine (16), and a water outlet at the bottom of the solution preheater (14) is connected with the outside;
wherein the crystallization water production subsystem comprises the saturator (5), a throttle valve I (6), a solution cooler (7), a solution heater (9), a compressor (10), a stirrer (11), a centrifuge (12), a throttle valve II (13), a solution preheater (14) and a solution pump (17);
an inlet of a throttle valve I (6) of the crystallization water production subsystem is connected with a solution outlet at the bottom of the saturator (5), an outlet of the throttle valve I (6) is connected with a hot side inlet of the solution cooler (7), a hot side outlet of the solution cooler (7) is connected with an inlet of a stirrer (11), a solution outlet of the stirrer (11) is connected with an inlet of a solution pump (17), a crystal slurry outlet of the stirrer (11) is connected with a crystal slurry inlet of a centrifuge (12), a crystal outlet of the centrifuge (12) is connected with the outside, and a mother liquor outlet of the centrifuge (12) is connected with an inlet of the solution pump (17); a cold side outlet of the solution cooler (7) is connected with an inlet of a compressor (10), an outlet of the compressor (10) is connected with a hot side inlet of the solution heater (9), a hot side outlet of the solution heater (9) is connected with an inlet of a throttle valve II (13), and an outlet of the throttle valve II (13) is connected with a cold side inlet of the solution cooler (7); the solution outlet at the bottom of the solution preheater (14) is connected with the inlet of a solution pump (17), the outlet of the solution pump (17) is connected with the cold side inlet of a solution heater (9), and the cold side outlet of the solution heater (9) is connected with the solution inlet at the top of the saturator (5).
2. The working method of the solar wet helium turbine cycle electricity-water-salt tri-generation zero-emission system as claimed in claim 1, is characterized by comprising the following working processes:
in the solar wet helium turbine circulation subsystem, after the cold molten salt in the cold molten salt tank (2) absorbs solar energy in the solar heat collector (3), the cold molten salt enters the hot molten salt tank (1) to store heat, the hot molten salt in the hot molten salt tank (1) releases heat to the hot side of the helium heater (4), and the cooled molten salt returns to the cold molten salt tank (2) again to complete the molten salt heat circulation; the wet helium gas after heat release is condensed in the solution preheater (14), is pressurized by a helium compressor (8), then is introduced into the tower from the bottom of the saturator (5), and generates a heat and mass transfer process with the total solution flow entering from the top of the saturator (5), the heated wet helium gas continuously enters the cold side of the helium heater (4) to exchange heat with molten salt at the hot side, and finally enters a helium turbine (16) to expand and work to drive a generator (15) to work;
in a crystallization water production subsystem, a total solution flow enters a solution heater (9) after being boosted by a solution pump (17), absorbs a low-boiling point working medium therein to release heat, enters from the top of a saturator (5), generates a heat and mass transfer process with wet helium gas entering from the bottom of the saturator (5), is reduced in pressure by a throttle valve I (6), flows to the hot side of a solution cooler (7), releases heat to the low-boiling point working medium in a heat pump sub-cycle to become a supersaturated solution, then enters a stirrer (11) to form a crystal slurry, and the crystal slurry continuously enters a centrifuge (12) to be separated, so that crystals are obtained; the solution at the outlet of the centrifuge (12) and the stirrer (11) is merged with the solution preheated by the solution preheater (14), enters a solution pump (17) as the total solution flow to be boosted, and then flows into the cold side of the solution heater (9); the low boiling point working medium in the heat pump cycle absorbs the energy of the hot side of the working medium in the solution cooler (7) and then becomes low-temperature low-pressure steam, the low-temperature low-pressure steam is compressed to a high-temperature high-pressure state by a compressor (10), then the low-temperature low-pressure steam is introduced into the hot side of the solution heater (9), releases heat to the total solution flow and is condensed into a liquid state, the pressure of the liquid state is reduced by a throttle valve II (13), and then the liquid state enters the solution cooler (7) again to complete the sub-cycle of the heat pump; wet helium gas from the outlet of the helium turbine (16) enters from the bottom of the solution preheater (14) and performs a countercurrent heat exchange process with the solution entering from the top of the solution preheater, and water vapor carried by the wet helium gas is condensed and accumulated at the bottom of the solution preheater (14) and is led to the outside through a pipeline, so that water is produced.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114151297A (en) * | 2021-12-02 | 2022-03-08 | 南京航空航天大学 | Wet helium gas circulating water and electricity cogeneration system based on solar drive and working method |
| KR20240012144A (en) | 2022-07-20 | 2024-01-29 | 경희대학교 산학협력단 | Solar powered multi generation system |
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