CN107013892B - Gas turbine waste heat boiler device with molten salt heat storage function - Google Patents
Gas turbine waste heat boiler device with molten salt heat storage function Download PDFInfo
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- CN107013892B CN107013892B CN201710347124.0A CN201710347124A CN107013892B CN 107013892 B CN107013892 B CN 107013892B CN 201710347124 A CN201710347124 A CN 201710347124A CN 107013892 B CN107013892 B CN 107013892B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/06—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being molten; Use of molten metal, e.g. zinc, as heat transfer medium
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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
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
- F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
- F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H7/00—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release
- F24H7/02—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid
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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
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses a gas turbine waste heat boiler device with molten salt heat storage, which comprises a double-medium gas turbine waste heat boiler, a high/low temperature molten salt tank, a high/low temperature molten salt pump, a molten salt-steam generating device, a deaerator and the like, wherein the double-medium gas turbine waste heat boiler can generate steam and high-temperature molten salt. When the power demand is reduced and the output power of the gas turbine combined cycle is difficult to be normally consumed by a power grid, the low-temperature molten salt of the low-temperature molten salt tank is conveyed to the double-medium gas turbine waste heat boiler through the low-temperature molten salt pump to be heated, and the high-temperature molten salt generated after heating is stored in the high-temperature molten salt tank. When a user needs the molten salt, the high-temperature molten salt in the high-temperature molten salt tank is conveyed into the molten salt-steam generating device through the high-temperature molten salt pump to release heat to generate required steam for power generation, heat supply or refrigeration. The molten salt has high heat capacity and good heat transfer fluidity, is easy to realize large-scale large-capacity heat storage, and better meets the requirements for cold \ heat \ electricity.
Description
Technical Field
The invention belongs to the technical field of energy conservation and emission reduction, and particularly relates to a gas turbine waste heat boiler device with molten salt heat storage.
Background
The gas-steam combined cycle power station is the fastest power generation form developed internationally at present, has the advantages of high power generation efficiency, short construction period, convenient operation and the like, and has great significance for power supply of China. At present, because the power load is uneven, when the power consumption peak is in daytime, holidays and the like, the gas turbine combined cycle unit basically runs at full load to meet the power consumption requirement; when electricity consumption is low at night and the like, the load of the gas turbine combined cycle unit is mostly required to be reduced for operation. The unit operates at low load, the heat consumption rate is increased, the station service power consumption is increased, the power generation cost is increased, and the economic benefit is reduced. According to the relevant data, the 9FA type single-shaft combined cycle unit of GE has the advantages that when the load rate of the unit is 80% in low-load operation and the load rate of the unit is 60%, the heat consumption is increased by 4%, and when the load rate of the unit is 40%, the heat consumption is increased by 20%.
Therefore, the method utilizes the fused salt energy storage to adjust the load change, and is a potential way for improving the unit efficiency, saving energy and reducing emission.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the gas turbine waste heat boiler device with the fused salt heat storage function is provided, when the power demand is reduced, the gas turbine unit still runs at full load without load reduction, and redundant energy is stored in a high-temperature fused salt tank by utilizing the fused salt; when a user needs the system, high-temperature molten salt is utilized to pass through heat exchange equipment to generate steam or hot water for power generation, heat supply or refrigeration. The system not only improves the unit efficiency of the gas turbine combined cycle unit, but also can meet the requirements of users on different types of energy in different time periods.
The technical scheme adopted by the invention for solving the technical problems is as follows: a gas turbine waste heat boiler device with molten salt heat storage comprises a gas turbine, a double-medium gas turbine waste heat boiler, a high-temperature molten salt tank, a high-temperature molten salt pump, a molten salt-steam generating device, a deaerator, a water feed pump, a low-temperature molten salt tank, a low-temperature molten salt pump, a steam turbine, a motor and a condenser, wherein gas exhausted by the gas turbine is a heat source of the whole system; the double-medium gas turbine waste heat boiler is used for heating molten salt and water supply; the high-temperature molten salt tank is used for storing high-temperature molten salt; the high-temperature molten salt pump provides high-temperature molten salt for the molten salt-steam generating device; the molten salt-steam generating device is used for heating feed water; the deaerator is used for deaerating condensed water; the feed pump supplies feed water for the double-medium gas turbine waste heat boiler; the low-temperature molten salt tank is used for storing low-temperature molten salt; the low-temperature molten salt pump provides low-temperature molten salt for the double-medium gas turbine waste heat boiler; the steam turbine and the motor are used for generating electricity; the condenser is used for condensing the exhaust steam of the steam turbine.
The double-medium gas turbine waste heat boiler is provided with a first water supply heater, a second water supply heater, a first evaporator and a first superheater for heating supercooled water, and is also provided with a molten salt heater for heating molten salt, and the molten salt-steam generating device is composed of a preheater, a second evaporator and a second superheater.
When the electricity demand is normal, condensed water is deaerated by a deaerator and then is sent to a first water supply heater, a first evaporator and a first superheater of a double-medium gas turbine waste heat boiler through a water supply pump to be heated, and required steam is generated to generate electricity; when the power demand is reduced and the output power of the gas turbine combined cycle is difficult to be normally consumed by a power grid, the system enters a heat storage mode, low-temperature molten salt in a low-temperature molten salt tank is sent to a double-medium gas turbine waste heat boiler through a low-temperature molten salt pump for heating, high-temperature molten salt generated by heating is stored in a high-temperature molten salt tank, and a molten salt heater in the double-medium gas turbine waste heat boiler can be designed into one stage or multiple stages according to the requirement of load adjustment; when the power demand improves or need be to external heat supply, the high temperature fused salt in the high temperature fused salt jar is sent into fused salt-steam generating device's second over heater, second evaporimeter and pre-heater through the high temperature fused salt pump in, will condense to feed water and heat into required steam or hot water, realizes generating electricity or external heat supply, at this in-process, becomes low temperature fused salt behind the high temperature fused salt release energy, stores in the low temperature fused salt jar.
The working principle of the gas turbine waste heat boiler device with the fused salt heat storage function is shown in figure 1, and the gas turbine waste heat boiler device comprises a double-medium gas turbine waste heat boiler which can generate steam and high-temperature fused salt, a high/low-temperature fused salt tank, a high/low-temperature fused salt pump used for driving fused salt, a fused salt-steam generating device used for generating steam, a deaerator and the like. When the power demand is reduced and the output power of the gas turbine combined cycle is difficult to be normally consumed by a power grid, the low-temperature molten salt of the low-temperature molten salt tank is conveyed to the double-medium gas turbine waste heat boiler through the low-temperature molten salt pump to be heated, and the high-temperature molten salt generated after heating is stored in the high-temperature molten salt tank. When a user needs the molten salt, the high-temperature molten salt in the high-temperature molten salt tank is conveyed into the molten salt-steam generating device through the high-temperature molten salt pump to release heat to generate required steam for power generation, heat supply or refrigeration. In addition, the molten salt pipeline and the related equipment of the whole system are provided with salt dredging pipelines, when the system stops working, molten salt can be discharged quickly, molten salt solidification is prevented, and the safety of the system is improved. The high/low temperature molten salt tank is provided with distributing pipes at different heights, so that molten salt entering the high/low temperature molten salt tank is uniformly distributed, and molten salt temperature stratification is prevented as far as possible.
Compared with the prior art, the invention has the advantages that:
(1) the gas turbine waste heat boiler device with the fused salt heat storage utilizes the fused salt energy storage to adjust the load change, is used for power generation, heat supply or refrigeration, improves the unit efficiency, increases the income of a power plant, and can meet the requirements of different types of energy in different time periods.
(2) The molten salt has high heat capacity and good heat transfer fluidity, is easy to realize large-scale large-capacity heat storage, and better meets the requirements for cold \ heat \ electricity.
Drawings
FIG. 1 is a working schematic diagram of a gas turbine waste heat boiler device with molten salt heat storage of the invention;
the system comprises a gas turbine 1, a double-medium gas turbine waste heat boiler 2, a high-temperature molten salt tank 3, a high-temperature molten salt pump 4, a molten salt-steam generating device 5, a deaerator 6, a water feed pump 7, a low-temperature molten salt tank 8, a low-temperature molten salt pump 9, a steam turbine 10, a motor 11 and a condenser 12.
Detailed Description
The invention is further described below by way of example with reference to the accompanying drawings.
As shown in fig. 1, the invention provides a gas turbine waste heat boiler device with molten salt heat storage, which comprises a gas turbine 1, a dual-medium gas turbine waste heat boiler 2, a high-temperature molten salt tank 3, a high-temperature molten salt pump 4, a molten salt-steam generating device 5, a deaerator 6, a water feed pump 7, a low-temperature molten salt tank 8, a low-temperature molten salt pump 9, a steam turbine 10, a motor 11 and a condenser 12. The exhaust gas of the combustion engine 1 is a heat source of the whole system; the double-medium gas turbine waste heat boiler 2 is used for heating molten salt and water supply; the high-temperature molten salt tank 3 is used for storing high-temperature molten salt; the high-temperature molten salt pump 4 provides high-temperature molten salt for the molten salt-steam generating device 5; the molten salt-steam generating device 5 is used for heating feed water; the deaerator 6 is used for deaerating condensed water; the feed pump 7 is used for supplying feed water for the double-medium gas turbine waste heat boiler 2; the low-temperature molten salt tank 8 is used for storing low-temperature molten salt; the low-temperature molten salt pump 9 is used for providing low-temperature molten salt for the double-medium gas turbine waste heat boiler 2; the steam turbine 10 and the motor 11 are used for generating electricity; the condenser is used for condensing the exhaust steam of the steam turbine.
The double-medium gas turbine waste heat boiler 2 is provided with a first water supply heater, a second water supply heater, a first evaporator and a first superheater for heating supercooled water, and is also provided with a molten salt heater for heating molten salt. The molten salt-steam generating device 5 consists of a preheater, a second evaporator and a second superheater.
When the electricity demand is normal, after the oxygen is removed through the oxygen remover 6, the condensed water is sent into the first water supply heater, the first evaporator and the first superheater of the double-medium combustion engine waste heat boiler 2 through the water supply pump 7 to be heated, and the required steam is generated to generate electricity.
When the electricity demand is reduced and the output power of the combined cycle of the gas turbine is difficult to be normally consumed by the power grid, the system enters a heat storage mode. The low-temperature molten salt in the low-temperature molten salt tank 8 is sent into the double-medium gas turbine waste heat boiler 2 through the low-temperature molten salt pump 9 to be heated, and the high-temperature molten salt generated through heating is stored in the high-temperature molten salt tank 3. The molten salt heater in the double-medium combustion engine waste heat boiler 2 can be designed into one stage or multiple stages according to the requirement of adjusting load.
When the power demand is increased or external heat supply is needed, high-temperature molten salt in the high-temperature molten salt tank 3 is sent into a second superheater, a second evaporator and a preheater of the molten salt-steam generating device 5 through the high-temperature molten salt pump 4, and the condensed feed water is heated into needed steam (or hot water), so that power generation or external heat supply is realized. In the process, the high-temperature molten salt is changed into low-temperature molten salt after releasing energy, and is stored in the low-temperature molten salt tank 8.
In addition, the whole molten salt pipeline and related equipment of the system are provided with the salt dredging device, when the system stops working, molten salt can be discharged quickly, the molten salt is prevented from being solidified, and the safety of the system is improved.
The utility model provides a take gas turbine exhaust-heat boiler device of fused salt heat-retaining, utilizes fused salt heat capacity height, heat transfer mobility characteristics such as good to carry out the energy storage, realizes adjusting the load change for electricity generation, heat supply or refrigeration have improved unit efficiency, have increased the income of power plant, and can satisfy the demand to different kinds of energy in different time quantums.
Claims (1)
1. The utility model provides a take gas turbine exhaust-heat boiler device of fused salt heat-retaining which characterized in that: the system comprises a gas turbine (1), a double-medium gas turbine waste heat boiler (2), a high-temperature molten salt tank (3), a high-temperature molten salt pump (4), a molten salt-steam generating device (5), a deaerator (6), a water feed pump (7), a low-temperature molten salt tank (8), a low-temperature molten salt pump (9), a steam turbine (10), a motor (11) and a condenser (12); the exhaust gas of the combustion engine (1) is a heat source of the whole system; the double-medium gas turbine waste heat boiler (2) is used for heating molten salt and water supply; the high-temperature molten salt tank (3) is used for storing high-temperature molten salt; the high-temperature molten salt pump (4) provides high-temperature molten salt for the molten salt-steam generating device (5); the molten salt-steam generating device (5) is used for heating feed water; the deaerator (6) is used for deaerating condensed water; the feed pump (7) supplies feed water for the double-medium combustion engine waste heat boiler (2); the low-temperature molten salt tank (8) is used for storing low-temperature molten salt; the low-temperature molten salt pump (9) provides low-temperature molten salt for the double-medium gas turbine waste heat boiler (2); the steam engine (10) and the motor (11) are used for generating electricity; the condenser is used for condensing the exhaust steam of the steam turbine;
the double-medium gas turbine waste heat boiler (2) is provided with a first water supply heater, a second water supply heater, a first evaporator and a first superheater for heating supercooled water, and is also provided with a molten salt heater for heating molten salt, and the molten salt-steam generating device (5) consists of a preheater, a second evaporator and a second superheater;
when the electricity demand is normal, condensed water is deaerated by a deaerator (6) and then is sent to a first water supply heater, a first evaporator and a first superheater of a double-medium gas turbine waste heat boiler (2) through a water supply pump (7) to be heated, and required steam is generated to generate electricity; when the power demand is reduced and the output power of the gas turbine combined cycle is difficult to be normally consumed by a power grid, the system enters a heat storage mode, low-temperature molten salt in a low-temperature molten salt tank (8) is sent to a double-medium gas turbine waste heat boiler (2) through a low-temperature molten salt pump (9) to be heated, high-temperature molten salt generated through heating is stored in a high-temperature molten salt tank (3), and a molten salt heater in the double-medium gas turbine waste heat boiler (2) can be designed into one stage or multiple stages according to the requirement of load adjustment; when the power demand is increased or heat needs to be supplied to the outside, high-temperature molten salt in the high-temperature molten salt tank (3) is sent into a second superheater, a second evaporator and a preheater of the molten salt-steam generating device (5) through the high-temperature molten salt pump (4), the condensed feed water is heated into required steam or hot water, power generation or heat supply to the outside is realized, and in the process, the high-temperature molten salt is changed into low-temperature molten salt after energy is released, and the low-temperature molten salt is stored in the low-temperature molten salt tank (8);
the molten salt pipeline and related equipment of the whole system are provided with salt dredging pipelines, and distribution pipes are arranged at different heights of the high/low temperature molten salt tanks.
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| CN201710347124.0A CN107013892B (en) | 2017-05-17 | 2017-05-17 | Gas turbine waste heat boiler device with molten salt heat storage function |
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| CN201710347124.0A CN107013892B (en) | 2017-05-17 | 2017-05-17 | Gas turbine waste heat boiler device with molten salt heat storage function |
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| CN107013892B true CN107013892B (en) | 2020-10-23 |
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| CN108316980B (en) * | 2018-03-14 | 2024-01-30 | 西安热工研究院有限公司 | Fused salt heat accumulation and release peak shaving system of thermal power generating unit |
| CN108426238A (en) * | 2018-03-20 | 2018-08-21 | 北京工业大学 | A kind of thermal power plant's fused salt storage heating system heated using main steam |
| CN108534222B (en) * | 2018-06-05 | 2023-04-25 | 百吉瑞（天津）新能源有限公司 | Molten salt energy storage and heat supply system with molten salt static mixer |
| CN109855079B (en) * | 2019-02-02 | 2023-11-14 | 华电电力科学研究院有限公司 | Combined cycle power peak regulation system based on steam extraction coupling heat accumulation and operation method thereof |
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| CN112629300B (en) * | 2020-11-19 | 2021-11-12 | 东北大学 | Combined cooling, heating and power system utilizing fused salt to store heat |
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| CN113343490B (en) * | 2021-06-29 | 2023-02-24 | 西安热工研究院有限公司 | Industrial steam supply power station operation optimization method and system coupled with molten salt heat storage |
| CN113623623A (en) * | 2021-08-19 | 2021-11-09 | 西安热工研究院有限公司 | Industrial steam supply system combining boiler and molten salt energy storage |
| CN114961906B (en) * | 2022-06-28 | 2024-05-17 | 西安热工研究院有限公司 | System for quickly starting gas-steam combined cycle unit and operation method |
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Address after: 1216, danionggang Road, Jianggan District, Hangzhou City, Zhejiang Province, 310021 Patentee after: Xizi clean energy equipment manufacturing Co.,Ltd. Address before: 1216, danionggang Road, Jianggan District, Hangzhou City, Zhejiang Province, 310021 Patentee before: HANGZHOU BOILER GROUP Co.,Ltd. |
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