WO2023123839A1 - 一种储能及其蒸汽发生系统及方法 - Google Patents

一种储能及其蒸汽发生系统及方法 Download PDF

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Publication number
WO2023123839A1
WO2023123839A1 PCT/CN2022/094876 CN2022094876W WO2023123839A1 WO 2023123839 A1 WO2023123839 A1 WO 2023123839A1 CN 2022094876 W CN2022094876 W CN 2022094876W WO 2023123839 A1 WO2023123839 A1 WO 2023123839A1
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WIPO (PCT)
Prior art keywords
molten salt
steam
pipeline
temperature molten
storage tank
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PCT/CN2022/094876
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English (en)
French (fr)
Inventor
耿宣
沈明忠
白永锋
王凯亮
汪洋
胡小夫
苏军划
杨彭飞
王争荣
何佳
Original Assignee
中国华电科工集团有限公司
华电环保系统工程有限公司
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Publication of WO2023123839A1 publication Critical patent/WO2023123839A1/zh

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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
    • F22B1/28—Methods of steam generation characterised by form of heating method in boilers heated electrically
    • F22B1/30—Electrode boilers
    • 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
    • F22B1/028—Steam generation using heat accumulators
    • 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
    • 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
    • F22D7/00—Auxiliary devices for promoting water circulation
    • F22D7/06—Rotary devices, e.g. propellers
    • F22D7/08—Arrangements of pumps, e.g. outside the boilers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22G—SUPERHEATING OF STEAM
    • F22G1/00—Steam superheating characterised by heating method
    • F22G1/16—Steam superheating characterised by heating method by using a separate heat source independent from heat supply of the steam boiler, e.g. by electricity, by auxiliary combustion of fuel oil
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14—Thermal energy storage

Definitions

  • the invention relates to an energy storage and its steam generation system and method, belonging to the technical field of energy storage.
  • the electric resistance molten salt electric heating furnace is the core equipment of the system, which uses tubular electric heating elements to convert electric energy into heat energy and store it in molten salt.
  • the traditional resistance electric heating method uses the heat energy generated by the Joule effect when the current flows through the resistance wire, and several electric heating elements are connected in parallel to achieve the power required by the heating furnace. Therefore, the main problem of the resistance molten salt heating furnace is to ensure the life and reliability of a large number of heating elements, so as to meet the normal operation of large-scale energy storage systems.
  • the object of the present invention is to provide an energy storage and its steam generation system, as well as an energy storage and its steam generation method.
  • the present invention converts electrical energy into thermal energy and stores it in molten salt, and heats it by coupling the molten salt with an electrode boiler
  • the method of generating steam releases energy to supply steam to the outside or push the steam turbine to do work, so as to realize large-scale heat storage, and solve the problems of life and reliability of the heating system caused by the traditional direct use of resistance electric heaters.
  • an energy storage and its steam generation system including an electrode steam boiler, one side of the electrode steam boiler is connected to a boiler deaerator, and the top of the electrode steam boiler
  • An A pipeline is provided, and a steam superheater is connected to the A pipeline, and an external steam supply outlet pipeline is provided at the outlet of the steam superheater, and a molten salt steam generation bypass pipeline and a B pipeline are provided on the steam superheater, so One end of the molten salt steam generation bypass pipeline is connected to the steam superheater, the B pipeline is connected to a low-temperature molten salt storage tank, and the upper pipeline of the low-temperature molten salt storage tank is connected to a high-temperature molten salt storage tank, and the molten salt steam generation The other end of the bypass pipe is connected to the high-temperature molten salt storage tank; the electric energy is converted into thermal energy and stored in the molten salt, and the energy is released by coup
  • the pipe section between the electrode steam boiler and the boiler deaerator is provided with a feedwater bypass pipe, and one end of the feedwater bypass pipe is connected to the electrode steam boiler and the boiler deaerator.
  • the other end of the feedwater bypass pipe is connected to the A pipe, and the pipe section between the inlet end of the feedwater bypass pipe and the boiler deaerator is provided with a feedwater pump.
  • the feed water bypass pipeline is provided with a preheater and a steam generator in sequence, and the molten salt steam generation bypass pipeline also passes through the preheater and the steam generator in sequence.
  • the molten salt steam generation bypass pipeline is provided with a molten salt bypass pipeline, and the preheater and steam generator are placed at the inlet and outlet of the molten salt bypass pipeline Pipe segment between ends.
  • a molten salt electric heater is arranged on the pipe section between the low-temperature molten salt storage tank and the high-temperature molten salt storage tank.
  • the low-temperature molten salt storage tank is provided with a low-temperature molten salt pump
  • the high-temperature molten salt storage tank is provided with a high-temperature molten salt pump
  • the high-temperature molten salt pump is connected to the molten salt steam generator Bypass pipeline
  • the high temperature molten salt pump is provided with a molten salt steam bypass pipeline
  • one end of the molten salt steam bypass pipeline is connected to the high temperature molten salt pump
  • the other end of the molten salt steam bypass pipeline is connected to the B pipeline.
  • a pipe C is arranged between the bypass pipe for generating molten salt steam and the pipe B, and one end of the pipe C is connected between the preheater and the inlet end of the bypass pipe for molten salt The other end of the C pipeline is connected to the pipeline section between the molten salt vapor generation bypass pipeline and the low-temperature molten salt storage tank.
  • a method for energy storage and steam generation thereof comprising the following steps:
  • the water in the boiler deaerator When the energy is released, the water in the boiler deaerator is transported to the electrode steam boiler through the feed water pump, and is generated into saturated steam in the electrode steam boiler; after the high-temperature molten salt from the high-temperature molten salt storage tank passes through the high-temperature molten salt pump, After passing through the molten salt bypass pipeline, it exchanges heat with saturated steam in the steam superheater to generate superheated steam and then goes to the external steam supply outlet pipeline; after heat exchange of high-temperature molten salt, part of the high-temperature molten salt becomes low-temperature molten salt and returns to to the low-temperature molten salt storage tank; the other part of the high-temperature molten salt passes through the steam superheater, steam generator, and preheater in sequence, and then turns into low-temperature molten salt and returns to the low-temperature molten salt storage tank through the C pipeline.
  • the electrode steam boiler and the molten salt steam bypass pipeline are closed, and the molten salt steam generation bypass pipeline is opened; the water in the boiler deaerator passes through the feed water pump Pass through the feed water bypass pipeline and A pipeline in turn, and conduct countercurrent heat exchange with the high-temperature molten salt from the high-temperature molten salt storage tank through the molten salt steam generation bypass pipeline in turn through the preheater, steam generator, and steam superheater, and finally generate saturation
  • the steam goes to the external steam supply outlet pipeline; the high-temperature molten salt from the high-temperature molten salt storage tank passes through the steam superheater, steam generator, and preheater in sequence, and then turns into low-temperature molten salt and returns to the low-temperature molten salt storage tank through the C pipeline .
  • the present invention sets up electrode steam boilers and molten salt steam superheaters according to the difference in heating power in different temperature ranges during the heating process, and uses electrode steam boilers to heat the main energy-consuming steam generation process, which consumes less energy. Few superheaters are heated by molten salt, which greatly reduces the number of resistive molten salt heaters, thereby improving the life, reliability and economy of the system; the invention can convert excess electric energy into thermal energy and store it in the high temperature molten salt storage In the tank, it plays the role of large-scale energy storage. At the same time, combined with thermal power plants, it can achieve the functions of peak regulation, frequency modulation and heat supply of thermal power units, which greatly improves the flexibility of thermal power units and the ability to absorb new energy.
  • Fig. 1 is a structural schematic diagram of the present invention.
  • Embodiment 1 of the present invention an energy storage system and its steam generation system, including an electrode steam boiler 1, one side of the electrode steam boiler 1 is connected to a boiler deaerator 2, and the top of the electrode steam boiler 1 is provided with a Pipeline 3, the A pipeline 3 is connected with a steam superheater 4, the outlet of the steam superheater 4 is provided with an external steam supply outlet pipeline 5, and the steam superheater 4 is provided with a molten salt steam generation bypass pipeline 6 and B pipeline 7, one end of the molten salt steam generation bypass pipeline 6 is connected with the steam superheater 4, the B pipeline 7 is connected with a low-temperature molten salt storage tank 8, and the low-temperature molten salt storage tank 8 is connected with a pipeline
  • the high-temperature molten salt storage tank 9 is connected with the high-temperature molten salt storage tank 9 at the other end of the molten salt vapor generation bypass pipeline 6 .
  • Embodiment 2 of the present invention an energy storage system and its steam generation system, including an electrode steam boiler 1, one side of the electrode steam boiler 1 is connected to a boiler deaerator 2, and the top of the electrode steam boiler 1 is provided with a Pipeline 3, the A pipeline 3 is connected with a steam superheater 4, the outlet of the steam superheater 4 is provided with an external steam supply outlet pipeline 5, and the steam superheater 4 is provided with a molten salt steam generation bypass pipeline 6 and B pipeline 7, one end of the molten salt steam generation bypass pipeline 6 is connected with the steam superheater 4, the B pipeline 7 is connected with a low-temperature molten salt storage tank 8, and the low-temperature molten salt storage tank 8 is connected with a pipeline High-temperature molten salt storage tank 9, the other end of molten salt steam generation bypass pipe 6 is connected to high-temperature molten salt storage tank 9; the pipe section between the electrode steam boiler 1 and boiler deaerator 2 is provided with a water supply bypass pipe 10.
  • feedwater bypass pipe 10 One end of the feedwater bypass pipe 10 is connected to the pipe section between the electrode steam boiler 1 and the boiler deaerator 2, the other end of the feedwater bypass pipe 10 is connected to the A pipe 3, and the inlet end of the feedwater bypass pipe 10 is connected to the A feed water pump 11 is provided on the pipe section between the boiler deaerators 2 .
  • Embodiment 3 of the present invention an energy storage system and its steam generation system, including an electrode steam boiler 1, one side of the electrode steam boiler 1 is connected to a boiler deaerator 2, and the top of the electrode steam boiler 1 is provided with a Pipeline 3, the A pipeline 3 is connected with a steam superheater 4, the outlet of the steam superheater 4 is provided with an external steam supply outlet pipeline 5, and the steam superheater 4 is provided with a molten salt steam generation bypass pipeline 6 and B pipeline 7, one end of the molten salt steam generation bypass pipeline 6 is connected with the steam superheater 4, the B pipeline 7 is connected with a low-temperature molten salt storage tank 8, and the low-temperature molten salt storage tank 8 is connected with a pipeline High-temperature molten salt storage tank 9, the other end of molten salt steam generation bypass pipe 6 is connected to high-temperature molten salt storage tank 9; the pipe section between the electrode steam boiler 1 and boiler deaerator 2 is provided with a water supply bypass pipe 10.
  • feedwater bypass pipe 10 One end of the feedwater bypass pipe 10 is connected to the pipe section between the electrode steam boiler 1 and the boiler deaerator 2, the other end of the feedwater bypass pipe 10 is connected to the A pipe 3, and the inlet end of the feedwater bypass pipe 10 is connected to the A feedwater pump 11 is provided on the pipe section between the boiler deaerators 2; a preheater 12 and a steam generator 13 are arranged in turn on the feedwater bypass pipe 10, and the molten salt steam generation bypass pipe 6 also passes through the preheater in turn. Heater 12 and steam generator 13.
  • Embodiment 4 of the present invention an energy storage system and its steam generation system, including an electrode steam boiler 1, one side of the electrode steam boiler 1 is connected to a boiler deaerator 2, and the top of the electrode steam boiler 1 is provided with a Pipeline 3, the A pipeline 3 is connected with a steam superheater 4, the outlet of the steam superheater 4 is provided with an external steam supply outlet pipeline 5, and the steam superheater 4 is provided with a molten salt steam generation bypass pipeline 6 and B pipeline 7, one end of the molten salt steam generation bypass pipeline 6 is connected with the steam superheater 4, the B pipeline 7 is connected with a low-temperature molten salt storage tank 8, and the low-temperature molten salt storage tank 8 is connected with a pipeline High-temperature molten salt storage tank 9, the other end of molten salt steam generation bypass pipe 6 is connected to high-temperature molten salt storage tank 9; the pipe section between the electrode steam boiler 1 and boiler deaerator 2 is provided with a water supply bypass pipe 10.
  • feedwater bypass pipe 10 One end of the feedwater bypass pipe 10 is connected to the pipe section between the electrode steam boiler 1 and the boiler deaerator 2, the other end of the feedwater bypass pipe 10 is connected to the A pipe 3, and the inlet end of the feedwater bypass pipe 10 is connected to the A feedwater pump 11 is provided on the pipe section between the boiler deaerators 2; a preheater 12 and a steam generator 13 are arranged in turn on the feedwater bypass pipe 10, and the molten salt steam generation bypass pipe 6 also passes through the preheater in turn. Heater 12 and steam generator 13; molten salt bypass pipeline 6 is provided with molten salt bypass pipeline 14, and preheater 12 and steam generator 13 are placed at the inlet end of molten salt bypass pipeline 14 and the pipe section between the outlet end.
  • Embodiment 5 of the present invention an energy storage system and its steam generation system, including an electrode steam boiler 1, one side of the electrode steam boiler 1 is connected to a boiler deaerator 2, and the top of the electrode steam boiler 1 is provided with a Pipeline 3, the A pipeline 3 is connected with a steam superheater 4, the outlet of the steam superheater 4 is provided with an external steam supply outlet pipeline 5, and the steam superheater 4 is provided with a molten salt steam generation bypass pipeline 6 and B pipeline 7, one end of the molten salt steam generation bypass pipeline 6 is connected with the steam superheater 4, the B pipeline 7 is connected with a low-temperature molten salt storage tank 8, and the low-temperature molten salt storage tank 8 is connected with a pipeline High-temperature molten salt storage tank 9, the other end of molten salt steam generation bypass pipe 6 is connected to high-temperature molten salt storage tank 9; the pipe section between the electrode steam boiler 1 and boiler deaerator 2 is provided with a water supply bypass pipe 10.
  • feedwater bypass pipe 10 One end of the feedwater bypass pipe 10 is connected to the pipe section between the electrode steam boiler 1 and the boiler deaerator 2, the other end of the feedwater bypass pipe 10 is connected to the A pipe 3, and the inlet end of the feedwater bypass pipe 10 is connected to the A feedwater pump 11 is provided on the pipe section between the boiler deaerators 2; a preheater 12 and a steam generator 13 are arranged in turn on the feedwater bypass pipe 10, and the molten salt steam generation bypass pipe 6 also passes through the preheater in turn.
  • molten salt bypass pipeline 6 is provided with molten salt bypass pipeline 14, and preheater 12 and steam generator 13 are placed at the inlet end of molten salt bypass pipeline 14 and the pipe section between the outlet end; the pipe section between the low-temperature molten salt storage tank 8 and the high-temperature molten salt storage tank 9 is provided with a molten salt electric heater 15 .
  • Embodiment 6 of the present invention an energy storage system and its steam generation system, including an electrode steam boiler 1, one side of the electrode steam boiler 1 is connected to a boiler deaerator 2, and the top of the electrode steam boiler 1 is provided with a Pipeline 3, the A pipeline 3 is connected with a steam superheater 4, the outlet of the steam superheater 4 is provided with an external steam supply outlet pipeline 5, and the steam superheater 4 is provided with a molten salt steam generation bypass pipeline 6 and B pipeline 7, one end of the molten salt steam generation bypass pipeline 6 is connected with the steam superheater 4, the B pipeline 7 is connected with a low-temperature molten salt storage tank 8, and the low-temperature molten salt storage tank 8 is connected with a pipeline High-temperature molten salt storage tank 9, the other end of molten salt steam generation bypass pipe 6 is connected to high-temperature molten salt storage tank 9; the pipe section between the electrode steam boiler 1 and boiler deaerator 2 is provided with a water supply bypass pipe 10.
  • feedwater bypass pipe 10 One end of the feedwater bypass pipe 10 is connected to the pipe section between the electrode steam boiler 1 and the boiler deaerator 2, the other end of the feedwater bypass pipe 10 is connected to the A pipe 3, and the inlet end of the feedwater bypass pipe 10 is connected to the A feedwater pump 11 is provided on the pipe section between the boiler deaerators 2; a preheater 12 and a steam generator 13 are arranged in turn on the feedwater bypass pipe 10, and the molten salt steam generation bypass pipe 6 also passes through the preheater in turn.
  • molten salt bypass pipeline 6 is provided with molten salt bypass pipeline 14, and preheater 12 and steam generator 13 are placed at the inlet end of molten salt bypass pipeline 14 and the pipe section between the outlet end;
  • the pipe section between the low-temperature molten salt storage tank 8 and the high-temperature molten salt storage tank 9 is provided with a molten salt electric heater 15;
  • the low-temperature molten salt storage tank 8 is provided with a low-temperature melting A salt pump 16, a high-temperature molten salt pump 17 is provided on the high-temperature molten salt storage tank 9, and the high-temperature molten salt pump 17 is connected to the molten salt steam generation bypass pipeline 6, and a molten salt steam bypass pipeline 18 is provided on the high-temperature molten salt pump 17 , one end of the molten salt steam bypass pipeline 18 is connected to the high temperature molten salt pump 17, and the other end of the molten salt steam bypass pipeline 18 is connected to the B pipeline 7.
  • Embodiment 7 of the present invention an energy storage system and its steam generation system, including an electrode steam boiler 1, one side of the electrode steam boiler 1 is connected to a boiler deaerator 2, and the top of the electrode steam boiler 1 is provided with a Pipeline 3, the A pipeline 3 is connected with a steam superheater 4, the outlet of the steam superheater 4 is provided with an external steam supply outlet pipeline 5, and the steam superheater 4 is provided with a molten salt steam generation bypass pipeline 6 and B pipeline 7, one end of the molten salt steam generation bypass pipeline 6 is connected with the steam superheater 4, the B pipeline 7 is connected with a low-temperature molten salt storage tank 8, and the low-temperature molten salt storage tank 8 is connected with a pipeline High-temperature molten salt storage tank 9, the other end of molten salt steam generation bypass pipe 6 is connected to high-temperature molten salt storage tank 9; the pipe section between the electrode steam boiler 1 and boiler deaerator 2 is provided with a water supply bypass pipe 10.
  • feedwater bypass pipe 10 One end of the feedwater bypass pipe 10 is connected to the pipe section between the electrode steam boiler 1 and the boiler deaerator 2, the other end of the feedwater bypass pipe 10 is connected to the A pipe 3, and the inlet end of the feedwater bypass pipe 10 is connected to the A feedwater pump 11 is provided on the pipe section between the boiler deaerators 2; a preheater 12 and a steam generator 13 are arranged in turn on the feedwater bypass pipe 10, and the molten salt steam generation bypass pipe 6 also passes through the preheater in turn.
  • molten salt bypass pipeline 6 is provided with molten salt bypass pipeline 14, and preheater 12 and steam generator 13 are placed at the inlet end of molten salt bypass pipeline 14 and the pipe section between the outlet end;
  • the pipe section between the low-temperature molten salt storage tank 8 and the high-temperature molten salt storage tank 9 is provided with a molten salt electric heater 15;
  • the low-temperature molten salt storage tank 8 is provided with a low-temperature melting
  • a salt pump 16 a high-temperature molten salt pump 17 is provided on the high-temperature molten salt storage tank 9, and the high-temperature molten salt pump 17 is connected to the molten salt steam generation bypass pipeline 6, and a molten salt steam bypass pipeline 18 is provided on the high-temperature molten salt pump 17 , one end of the molten salt steam bypass pipeline 18 is connected to the high-temperature molten salt pump 17, and the other end of the molten salt steam bypass pipeline 18 is connected to the B pipeline 7;
  • Embodiment 8 of the present invention an energy storage system and its steam generation system, including an electrode steam boiler 1, one side of the electrode steam boiler 1 is connected to a boiler deaerator 2, and the top of the electrode steam boiler 1 is provided with a Pipeline 3, the A pipeline 3 is connected with a steam superheater 4, the outlet of the steam superheater 4 is provided with an external steam supply outlet pipeline 5, and the steam superheater 4 is provided with a molten salt steam generation bypass pipeline 6 and B pipeline 7, one end of the molten salt steam generation bypass pipeline 6 is connected with the steam superheater 4, the B pipeline 7 is connected with a low-temperature molten salt storage tank 8, and the low-temperature molten salt storage tank 8 is connected with a pipeline High-temperature molten salt storage tank 9, the other end of molten salt steam generation bypass pipe 6 is connected to high-temperature molten salt storage tank 9; the pipe section between the electrode steam boiler 1 and boiler deaerator 2 is provided with a water supply bypass pipe 10.
  • feedwater bypass pipe 10 One end of the feedwater bypass pipe 10 is connected to the pipe section between the electrode steam boiler 1 and the boiler deaerator 2, the other end of the feedwater bypass pipe 10 is connected to the A pipe 3, and the inlet end of the feedwater bypass pipe 10 is connected to the A feedwater pump 11 is provided on the pipe section between the boiler deaerators 2; a preheater 12 and a steam generator 13 are arranged in turn on the feedwater bypass pipe 10, and the molten salt steam generation bypass pipe 6 also passes through the preheater in turn.
  • molten salt bypass pipeline 6 is provided with molten salt bypass pipeline 14, and preheater 12 and steam generator 13 are placed at the inlet end of molten salt bypass pipeline 14 and the pipe section between the outlet end;
  • the pipe section between the low-temperature molten salt storage tank 8 and the high-temperature molten salt storage tank 9 is provided with a molten salt electric heater 15;
  • the low-temperature molten salt storage tank 8 is provided with a low-temperature melting
  • a salt pump 16 a high-temperature molten salt pump 17 is provided on the high-temperature molten salt storage tank 9, and the high-temperature molten salt pump 17 is connected to the molten salt steam generation bypass pipeline 6, and a molten salt steam bypass pipeline 18 is provided on the high-temperature molten salt pump 17 , one end of the molten salt steam bypass pipeline 18 is connected to the high-temperature molten salt pump 17, and the other end of the molten salt steam bypass pipeline 18 is connected to the B pipeline 7;
  • a method for energy storage and steam generation thereof comprising the following steps:
  • the water in the boiler deaerator 2 is transported to the electrode steam boiler 1 through the feed water pump 11, and is generated into saturated steam in the electrode steam boiler 1;
  • the high temperature molten salt from the high temperature molten salt storage tank 9 passes through the high temperature
  • the low-temperature molten salt returns to the low-temperature molten salt storage tank 8 through the B pipeline 7; another part of the high-temperature molten salt passes through the steam superheater 4, the steam generator 13, and the preheater 12 in sequence, and then becomes the low-temperature molten salt through the C
  • the pipeline 19 returns to the low-temperature molten salt storage tank 8 .
  • Embodiment 9 of the present invention an energy storage system and its steam generation system, including an electrode steam boiler 1, one side of the electrode steam boiler 1 is connected to a boiler deaerator 2, and the top of the electrode steam boiler 1 is provided with a Pipeline 3, the A pipeline 3 is connected with a steam superheater 4, the outlet of the steam superheater 4 is provided with an external steam supply outlet pipeline 5, and the steam superheater 4 is provided with a molten salt steam generation bypass pipeline 6 and B pipeline 7, one end of the molten salt steam generation bypass pipeline 6 is connected with the steam superheater 4, the B pipeline 7 is connected with a low-temperature molten salt storage tank 8, and the low-temperature molten salt storage tank 8 is connected with a pipeline High-temperature molten salt storage tank 9, the other end of molten salt steam generation bypass pipe 6 is connected to high-temperature molten salt storage tank 9; the pipe section between the electrode steam boiler 1 and boiler deaerator 2 is provided with a water supply bypass pipe 10.
  • feedwater bypass pipe 10 One end of the feedwater bypass pipe 10 is connected to the pipe section between the electrode steam boiler 1 and the boiler deaerator 2, the other end of the feedwater bypass pipe 10 is connected to the A pipe 3, and the inlet end of the feedwater bypass pipe 10 is connected to the A feedwater pump 11 is provided on the pipe section between the boiler deaerators 2; a preheater 12 and a steam generator 13 are arranged in turn on the feedwater bypass pipe 10, and the molten salt steam generation bypass pipe 6 also passes through the preheater in turn.
  • molten salt bypass pipeline 6 is provided with molten salt bypass pipeline 14, and preheater 12 and steam generator 13 are placed at the inlet end of molten salt bypass pipeline 14 and the pipe section between the outlet end;
  • the pipe section between the low-temperature molten salt storage tank 8 and the high-temperature molten salt storage tank 9 is provided with a molten salt electric heater 15;
  • the low-temperature molten salt storage tank 8 is provided with a low-temperature melting
  • a salt pump 16 a high-temperature molten salt pump 17 is provided on the high-temperature molten salt storage tank 9, and the high-temperature molten salt pump 17 is connected to the molten salt steam generation bypass pipeline 6, and a molten salt steam bypass pipeline 18 is provided on the high-temperature molten salt pump 17 , one end of the molten salt steam bypass pipeline 18 is connected to the high-temperature molten salt pump 17, and the other end of the molten salt steam bypass pipeline 18 is connected to the B pipeline 7;
  • a method for energy storage and steam generation thereof comprising the following steps:
  • the working principle of an embodiment of the present invention when the present invention works, when there is excess electric energy and needs energy storage, the low-temperature molten salt pump 16 is started to extract the molten salt from the low-temperature molten salt storage tank 8; from the low-temperature molten salt storage tank
  • the molten salt of 8 passes through the molten salt electric heater 15, it is heated by the molten salt electric heater 15 to become a high-temperature molten salt and stored in the high-temperature molten salt storage tank 9; when the energy is released, the electrode steam boiler 1 and the molten salt steam are closed
  • the bypass pipe 18 opens the bypass pipe 6 for molten salt vapor generation; the water in the boiler deaerator 2 passes through the feed water pump 11 to pass the water through the feed water bypass pipe 10 and the A pipe 3 in turn, and the water from the high-temperature molten salt storage tank 9
  • the high-temperature molten salt passes through the molten salt steam generation bypass pipeline 6 sequentially through the preheat

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Abstract

本发明公开了一种储能及其蒸汽发生系统，包括电极蒸汽锅炉，电极蒸汽锅炉的一侧管道连接有锅炉除氧器，电极蒸汽锅炉的顶部设置有A管道，A管道上连接有蒸汽过热器，蒸汽过热器的出口处设置有外供汽出口管道，蒸汽过热器上设置有熔融盐蒸汽发生旁路管道和B管道，熔融盐蒸汽发生旁路管道的一端与蒸汽过热器连接，B管道上连接有低温熔融盐储罐，低温熔融盐储罐上管道连接有高温熔融盐储罐，熔融盐蒸汽发生旁路管道的另一端与高温熔融盐储罐连接，同时还公开了一种发生方法。本发明将电能转换成热能储存在熔融盐中，并通过耦合熔融盐加热产生蒸汽的方法释放能量对外供汽，以实现大规模储热，延长了加热系统寿命，增加了可靠性。

Description

一种储能及其蒸汽发生系统及方法 技术领域
本发明涉及一种储能及其蒸汽发生系统及方法，属于储能技术领域。
背景技术
长周期大规模低成本储能技术是实现“双碳”目标的重要支撑，是新型能源电力系统构建的基石和标志，也是电力行业摆脱碳约束的终极手段。目前处于研发的新型储能技术包括熔融盐储能、液态空气储能、压缩空气储能等技术，其中熔融盐储能技术因具有是长周期、大规模、低成本等优势，受到业内的广泛关注。并且，熔融盐储能技术可以与现有燃煤电厂相结合，在大规模储能的同时，为燃煤电厂实现机组深度调峰、调频、对外供热等目的。
对于传统的电加热熔融盐储能系统，电阻式熔盐电加热炉是系统的核心装备，利用管状电热元件将电能转化热能储存在熔融盐中。传统的电阻式电加热方式，是利用电流流过电阻丝时的焦耳效应产生的热能，由若干根电加热元件并联，从而达到加热炉要求的功率。因此，电阻式熔盐加热炉存在的主要问题是保证数量庞大加热元件的寿命及可靠性，从而满足大规模储能系统的正常运行。
发明内容
本发明的目的在于，提供一种储能及其蒸汽发生系统，还提供一种储能及其蒸汽发生方法，本发明将电能转换成热能储存在熔融盐中，并通过电极锅炉耦合熔融盐加热产生蒸汽的方法释放能量对外供汽或推动汽轮机做功，以实现大规模储热，并解决传统直接采用电阻式电加热器所带来的加热系统寿命及可靠性问题。
为解决上述技术问题，本发明采用如下的技术方案：一种储能及其蒸汽发生系统，包括电极蒸汽锅炉，所述电极蒸汽锅炉的一侧管道连接有锅炉除氧器，电极蒸汽锅炉的顶部设置有A管道，所述A管道上连接有蒸汽过热器，所述蒸汽过热器的出口处设置有外供汽出口管道，蒸汽过热器上设置有熔融盐蒸汽发生旁路管道和B管道，所述熔融盐蒸汽发生旁路管道的一端与蒸汽过热器连接，所述B管道上连接有低温熔融盐储罐，所述低温熔融盐储罐上管道连接有高温熔融盐储罐，熔融盐蒸汽发生旁路管道的另一端与高温熔融盐储罐连接；将电能转换成热能储存在熔融盐中，并通过电极锅炉耦合熔融盐加热产生蒸汽的方法释放能量对外供汽或推动汽轮机做功，以实现大规模储热，并解决传统直接采用电阻式电加热器所带来的加热系统寿命及可靠性问题。
前述的一种储能及其蒸汽发生系统，所述电极蒸汽锅炉与锅炉除氧器之间的管段上设置 有给水旁路管道，所述给水旁路管道的一端连接于电极蒸汽锅炉与锅炉除氧器之间的管段，给水旁路管道的另一端连接于A管道，给水旁路管道进口端与锅炉除氧器之间的管段上设置有给水泵。
前述的一种储能及其蒸汽发生系统，所述给水旁路管道上依次设置有预热器和蒸汽发生器，熔融盐蒸汽发生旁路管道也依次穿过预热器和蒸汽发生器。
前述的一种储能及其蒸汽发生系统，所述熔融盐蒸汽发生旁路管道上设置有熔融盐旁路管道，预热器和蒸汽发生器均置于熔融盐旁路管道的进口端和出口端之间的管段。
前述的一种储能及其蒸汽发生系统，所述低温熔融盐储罐与高温熔融盐储罐之间的管段上设置有熔融盐电加热器。
前述的一种储能及其蒸汽发生系统，所述低温熔融盐储罐上设置有低温熔融盐泵，高温熔融盐储罐上设置有高温熔融盐泵，高温熔融盐泵连接于熔融盐蒸汽发生旁路管道，高温熔融盐泵上设置有熔融盐蒸汽旁路管道，熔融盐蒸汽旁路管道的一端与高温熔融盐泵连接，熔融盐蒸汽旁路管道的另一端连接于B管道。
前述的一种储能及其蒸汽发生系统，所述熔融盐蒸汽发生旁路管道和B管道之间设置有C管道，C管道的一端连接于预热器与熔融盐旁路管道的进口端之间的管段上，C管道的另一端连接于熔融盐蒸汽发生旁路管道与低温熔融盐储罐之间的管段上。
一种储能及其蒸汽发生方法，包括以下步骤：
当存在多余电能需要储能时，启动低温熔融盐泵，将低温熔融盐储罐的熔融盐抽出；来自低温熔融盐储罐的熔融盐通过熔融盐电加热器时，被熔融盐电加热器加热成为高温熔融盐并储存在高温熔融盐储罐中；
当释放能量时，锅炉除氧器内的水通过给水泵输送至电极蒸汽锅炉中，并在电极蒸汽锅炉中产生成饱和蒸汽；来自高温熔融盐储罐的高温熔融盐通过高温熔融盐泵后，经熔融盐旁路管道后在蒸汽过热器中与饱和蒸汽换热，产生过热蒸汽后去对外供汽出口管道；高温熔融盐经换热后，一部分高温熔融盐变为低温熔融盐经由B管道回到低温熔融盐储罐；另一部分高温熔融盐依次经蒸汽过热器、蒸汽发生器、预热器换热后，变为低温熔融盐经由C管道回到低温熔融盐储罐。
前述的一种储能及其蒸汽发生方法，当释放能量时，关闭电极蒸汽锅炉及熔融盐蒸汽旁路管道，打开熔融盐蒸汽发生旁路管道；锅炉除氧器内的水通过给水泵将水依次通过给水旁路管道和A管道，与来自高温熔融盐储罐的高温熔融盐经由熔融盐蒸汽发生旁路管道依次经过预热器、蒸汽发生器、蒸汽过热器进行逆流换热，最后产生饱和蒸汽去对外供汽出口管道； 来自高温熔盐储罐的高温熔融盐依次经蒸汽过热器、蒸汽发生器、预热器换热后，变为低温熔融盐经由C管道回到低温熔融盐储罐。
与现有技术相比，本发明按照加热过程中不同温度区间加热功率的差异，设置了电极蒸汽锅炉和熔融盐蒸汽过热器，将主要耗能的蒸汽产生过程采用电极蒸汽锅炉加热，耗能较少的过热器采用熔融盐加热，极大减少了电阻式熔盐加热器的数量，从而提高了系统的寿命、可靠性及经济性；本发明可将多余电能转化为热能储存在高温熔融盐储罐中，起到大规模储能的作用，同时与火力发电厂相结合，可以达到火电机组调峰、调频及供热的作用，极大提升了火电机组灵活性及新能源消纳能力。
附图说明
图1是本发明的结构示意图。
附图标记：1-电极蒸汽锅炉，2-锅炉除氧器，3-A管道，4-蒸汽过热器，5-外供汽出口管道，6-熔融盐蒸汽发生旁路管道，7-B管道，8-低温熔融盐储罐，9-高温熔融盐储罐，10-给水旁路管道，11-给水泵，12-预热器，13-蒸汽发生器，14-熔融盐旁路管道，15-熔融盐电加热器，16-低温熔融盐泵，17-高温熔融盐泵，18-熔融盐蒸汽旁路管道，19-C管道。
下面结合附图和具体实施方式对本发明作进一步的说明。
具体实施方式
本发明的实施例1：一种储能及其蒸汽发生系统，包括电极蒸汽锅炉1，所述电极蒸汽锅炉1的一侧管道连接有锅炉除氧器2，电极蒸汽锅炉1的顶部设置有A管道3，所述A管道3上连接有蒸汽过热器4，所述蒸汽过热器4的出口处设置有外供汽出口管道5，蒸汽过热器4上设置有熔融盐蒸汽发生旁路管道6和B管道7，所述熔融盐蒸汽发生旁路管道6的一端与蒸汽过热器4连接，所述B管道7上连接有低温熔融盐储罐8，所述低温熔融盐储罐8上管道连接有高温熔融盐储罐9，熔融盐蒸汽发生旁路管道6的另一端与高温熔融盐储罐9连接。
本发明的实施例2：一种储能及其蒸汽发生系统，包括电极蒸汽锅炉1，所述电极蒸汽锅炉1的一侧管道连接有锅炉除氧器2，电极蒸汽锅炉1的顶部设置有A管道3，所述A管道3上连接有蒸汽过热器4，所述蒸汽过热器4的出口处设置有外供汽出口管道5，蒸汽过热器4上设置有熔融盐蒸汽发生旁路管道6和B管道7，所述熔融盐蒸汽发生旁路管道6的一端与蒸汽过热器4连接，所述B管道7上连接有低温熔融盐储罐8，所述低温熔融盐储罐8上管道连接有高温熔融盐储罐9，熔融盐蒸汽发生旁路管道6的另一端与高温熔融盐储罐9连接；所述电极蒸汽锅炉1与锅炉除氧器2之间的管段上设置有给水旁路管道10，所述给水旁路管道10的一端连接于电极蒸汽锅炉1与锅炉除氧器2之间的管段，给水旁路管道10的另一端 连接于A管道3，给水旁路管道10进口端与锅炉除氧器2之间的管段上设置有给水泵11。
本发明的实施例3：一种储能及其蒸汽发生系统，包括电极蒸汽锅炉1，所述电极蒸汽锅炉1的一侧管道连接有锅炉除氧器2，电极蒸汽锅炉1的顶部设置有A管道3，所述A管道3上连接有蒸汽过热器4，所述蒸汽过热器4的出口处设置有外供汽出口管道5，蒸汽过热器4上设置有熔融盐蒸汽发生旁路管道6和B管道7，所述熔融盐蒸汽发生旁路管道6的一端与蒸汽过热器4连接，所述B管道7上连接有低温熔融盐储罐8，所述低温熔融盐储罐8上管道连接有高温熔融盐储罐9，熔融盐蒸汽发生旁路管道6的另一端与高温熔融盐储罐9连接；所述电极蒸汽锅炉1与锅炉除氧器2之间的管段上设置有给水旁路管道10，所述给水旁路管道10的一端连接于电极蒸汽锅炉1与锅炉除氧器2之间的管段，给水旁路管道10的另一端连接于A管道3，给水旁路管道10进口端与锅炉除氧器2之间的管段上设置有给水泵11；所述给水旁路管道10上依次设置有预热器12和蒸汽发生器13，熔融盐蒸汽发生旁路管道6也依次穿过预热器12和蒸汽发生器13。
本发明的实施例4：一种储能及其蒸汽发生系统，包括电极蒸汽锅炉1，所述电极蒸汽锅炉1的一侧管道连接有锅炉除氧器2，电极蒸汽锅炉1的顶部设置有A管道3，所述A管道3上连接有蒸汽过热器4，所述蒸汽过热器4的出口处设置有外供汽出口管道5，蒸汽过热器4上设置有熔融盐蒸汽发生旁路管道6和B管道7，所述熔融盐蒸汽发生旁路管道6的一端与蒸汽过热器4连接，所述B管道7上连接有低温熔融盐储罐8，所述低温熔融盐储罐8上管道连接有高温熔融盐储罐9，熔融盐蒸汽发生旁路管道6的另一端与高温熔融盐储罐9连接；所述电极蒸汽锅炉1与锅炉除氧器2之间的管段上设置有给水旁路管道10，所述给水旁路管道10的一端连接于电极蒸汽锅炉1与锅炉除氧器2之间的管段，给水旁路管道10的另一端连接于A管道3，给水旁路管道10进口端与锅炉除氧器2之间的管段上设置有给水泵11；所述给水旁路管道10上依次设置有预热器12和蒸汽发生器13，熔融盐蒸汽发生旁路管道6也依次穿过预热器12和蒸汽发生器13；所述熔融盐蒸汽发生旁路管道6上设置有熔融盐旁路管道14，预热器12和蒸汽发生器13均置于熔融盐旁路管道14的进口端和出口端之间的管段。
本发明的实施例5：一种储能及其蒸汽发生系统，包括电极蒸汽锅炉1，所述电极蒸汽锅炉1的一侧管道连接有锅炉除氧器2，电极蒸汽锅炉1的顶部设置有A管道3，所述A管道3上连接有蒸汽过热器4，所述蒸汽过热器4的出口处设置有外供汽出口管道5，蒸汽过热器4上设置有熔融盐蒸汽发生旁路管道6和B管道7，所述熔融盐蒸汽发生旁路管道6的一端与蒸汽过热器4连接，所述B管道7上连接有低温熔融盐储罐8，所述低温熔融盐储罐8上管 道连接有高温熔融盐储罐9，熔融盐蒸汽发生旁路管道6的另一端与高温熔融盐储罐9连接；所述电极蒸汽锅炉1与锅炉除氧器2之间的管段上设置有给水旁路管道10，所述给水旁路管道10的一端连接于电极蒸汽锅炉1与锅炉除氧器2之间的管段，给水旁路管道10的另一端连接于A管道3，给水旁路管道10进口端与锅炉除氧器2之间的管段上设置有给水泵11；所述给水旁路管道10上依次设置有预热器12和蒸汽发生器13，熔融盐蒸汽发生旁路管道6也依次穿过预热器12和蒸汽发生器13；所述熔融盐蒸汽发生旁路管道6上设置有熔融盐旁路管道14，预热器12和蒸汽发生器13均置于熔融盐旁路管道14的进口端和出口端之间的管段；所述低温熔融盐储罐8与高温熔融盐储罐9之间的管段上设置有熔融盐电加热器15。
本发明的实施例6：一种储能及其蒸汽发生系统，包括电极蒸汽锅炉1，所述电极蒸汽锅炉1的一侧管道连接有锅炉除氧器2，电极蒸汽锅炉1的顶部设置有A管道3，所述A管道3上连接有蒸汽过热器4，所述蒸汽过热器4的出口处设置有外供汽出口管道5，蒸汽过热器4上设置有熔融盐蒸汽发生旁路管道6和B管道7，所述熔融盐蒸汽发生旁路管道6的一端与蒸汽过热器4连接，所述B管道7上连接有低温熔融盐储罐8，所述低温熔融盐储罐8上管道连接有高温熔融盐储罐9，熔融盐蒸汽发生旁路管道6的另一端与高温熔融盐储罐9连接；所述电极蒸汽锅炉1与锅炉除氧器2之间的管段上设置有给水旁路管道10，所述给水旁路管道10的一端连接于电极蒸汽锅炉1与锅炉除氧器2之间的管段，给水旁路管道10的另一端连接于A管道3，给水旁路管道10进口端与锅炉除氧器2之间的管段上设置有给水泵11；所述给水旁路管道10上依次设置有预热器12和蒸汽发生器13，熔融盐蒸汽发生旁路管道6也依次穿过预热器12和蒸汽发生器13；所述熔融盐蒸汽发生旁路管道6上设置有熔融盐旁路管道14，预热器12和蒸汽发生器13均置于熔融盐旁路管道14的进口端和出口端之间的管段；所述低温熔融盐储罐8与高温熔融盐储罐9之间的管段上设置有熔融盐电加热器15；所述低温熔融盐储罐8上设置有低温熔融盐泵16，高温熔融盐储罐9上设置有高温熔融盐泵17，高温熔融盐泵17连接于熔融盐蒸汽发生旁路管道6，高温熔融盐泵17上设置有熔融盐蒸汽旁路管道18，熔融盐蒸汽旁路管道18的一端与高温熔融盐泵17连接，熔融盐蒸汽旁路管道18的另一端连接于B管道7。
本发明的实施例7：一种储能及其蒸汽发生系统，包括电极蒸汽锅炉1，所述电极蒸汽锅炉1的一侧管道连接有锅炉除氧器2，电极蒸汽锅炉1的顶部设置有A管道3，所述A管道3上连接有蒸汽过热器4，所述蒸汽过热器4的出口处设置有外供汽出口管道5，蒸汽过热器4上设置有熔融盐蒸汽发生旁路管道6和B管道7，所述熔融盐蒸汽发生旁路管道6的一端与蒸汽过热器4连接，所述B管道7上连接有低温熔融盐储罐8，所述低温熔融盐储罐8上管 道连接有高温熔融盐储罐9，熔融盐蒸汽发生旁路管道6的另一端与高温熔融盐储罐9连接；所述电极蒸汽锅炉1与锅炉除氧器2之间的管段上设置有给水旁路管道10，所述给水旁路管道10的一端连接于电极蒸汽锅炉1与锅炉除氧器2之间的管段，给水旁路管道10的另一端连接于A管道3，给水旁路管道10进口端与锅炉除氧器2之间的管段上设置有给水泵11；所述给水旁路管道10上依次设置有预热器12和蒸汽发生器13，熔融盐蒸汽发生旁路管道6也依次穿过预热器12和蒸汽发生器13；所述熔融盐蒸汽发生旁路管道6上设置有熔融盐旁路管道14，预热器12和蒸汽发生器13均置于熔融盐旁路管道14的进口端和出口端之间的管段；所述低温熔融盐储罐8与高温熔融盐储罐9之间的管段上设置有熔融盐电加热器15；所述低温熔融盐储罐8上设置有低温熔融盐泵16，高温熔融盐储罐9上设置有高温熔融盐泵17，高温熔融盐泵17连接于熔融盐蒸汽发生旁路管道6，高温熔融盐泵17上设置有熔融盐蒸汽旁路管道18，熔融盐蒸汽旁路管道18的一端与高温熔融盐泵17连接，熔融盐蒸汽旁路管道18的另一端连接于B管道7；所述熔融盐蒸汽发生旁路管道6和B管道7之间设置有C管道19，C管道19的一端连接于预热器12与熔融盐旁路管道14的进口端之间的管段上，C管道19的另一端连接于熔融盐蒸汽发生旁路管道6与低温熔融盐储罐8之间的管段上。
本发明的实施例8：一种储能及其蒸汽发生系统，包括电极蒸汽锅炉1，所述电极蒸汽锅炉1的一侧管道连接有锅炉除氧器2，电极蒸汽锅炉1的顶部设置有A管道3，所述A管道3上连接有蒸汽过热器4，所述蒸汽过热器4的出口处设置有外供汽出口管道5，蒸汽过热器4上设置有熔融盐蒸汽发生旁路管道6和B管道7，所述熔融盐蒸汽发生旁路管道6的一端与蒸汽过热器4连接，所述B管道7上连接有低温熔融盐储罐8，所述低温熔融盐储罐8上管道连接有高温熔融盐储罐9，熔融盐蒸汽发生旁路管道6的另一端与高温熔融盐储罐9连接；所述电极蒸汽锅炉1与锅炉除氧器2之间的管段上设置有给水旁路管道10，所述给水旁路管道10的一端连接于电极蒸汽锅炉1与锅炉除氧器2之间的管段，给水旁路管道10的另一端连接于A管道3，给水旁路管道10进口端与锅炉除氧器2之间的管段上设置有给水泵11；所述给水旁路管道10上依次设置有预热器12和蒸汽发生器13，熔融盐蒸汽发生旁路管道6也依次穿过预热器12和蒸汽发生器13；所述熔融盐蒸汽发生旁路管道6上设置有熔融盐旁路管道14，预热器12和蒸汽发生器13均置于熔融盐旁路管道14的进口端和出口端之间的管段；所述低温熔融盐储罐8与高温熔融盐储罐9之间的管段上设置有熔融盐电加热器15；所述低温熔融盐储罐8上设置有低温熔融盐泵16，高温熔融盐储罐9上设置有高温熔融盐泵17，高温熔融盐泵17连接于熔融盐蒸汽发生旁路管道6，高温熔融盐泵17上设置有熔融盐蒸汽旁路管道18，熔融盐蒸汽旁路管道18的一端与高温熔融盐泵17连接，熔融盐蒸汽旁路管道 18的另一端连接于B管道7；所述熔融盐蒸汽发生旁路管道6和B管道7之间设置有C管道19，C管道19的一端连接于预热器12与熔融盐旁路管道14的进口端之间的管段上，C管道19的另一端连接于熔融盐蒸汽发生旁路管道6与低温熔融盐储罐8之间的管段上。
一种储能及其蒸汽发生方法，包括以下步骤：
当存在多余电能需要储能时，启动低温熔融盐泵16，将低温熔融盐储罐8的熔融盐抽出；来自低温熔融盐储罐8的熔融盐通过熔融盐电加热器15时，被熔融盐电加热器15加热成为高温熔融盐并储存在高温熔融盐储罐9中；
当释放能量时，锅炉除氧器2内的水通过给水泵11输送至电极蒸汽锅炉1中，并在电极蒸汽锅炉1中产生成饱和蒸汽；来自高温熔融盐储罐9的高温熔融盐通过高温熔融盐泵17后，经熔融盐旁路管道14后在蒸汽过热器4中与饱和蒸汽换热，产生过热蒸汽后去对外供汽出口管道5；高温熔融盐经换热后，一部分高温熔融盐变为低温熔融盐经由B管道7回到低温熔融盐储罐8；另一部分高温熔融盐依次经蒸汽过热器4、蒸汽发生器13、预热器12换热后，变为低温熔融盐经由C管道19回到低温熔融盐储罐8。
本发明的实施例9：一种储能及其蒸汽发生系统，包括电极蒸汽锅炉1，所述电极蒸汽锅炉1的一侧管道连接有锅炉除氧器2，电极蒸汽锅炉1的顶部设置有A管道3，所述A管道3上连接有蒸汽过热器4，所述蒸汽过热器4的出口处设置有外供汽出口管道5，蒸汽过热器4上设置有熔融盐蒸汽发生旁路管道6和B管道7，所述熔融盐蒸汽发生旁路管道6的一端与蒸汽过热器4连接，所述B管道7上连接有低温熔融盐储罐8，所述低温熔融盐储罐8上管道连接有高温熔融盐储罐9，熔融盐蒸汽发生旁路管道6的另一端与高温熔融盐储罐9连接；所述电极蒸汽锅炉1与锅炉除氧器2之间的管段上设置有给水旁路管道10，所述给水旁路管道10的一端连接于电极蒸汽锅炉1与锅炉除氧器2之间的管段，给水旁路管道10的另一端连接于A管道3，给水旁路管道10进口端与锅炉除氧器2之间的管段上设置有给水泵11；所述给水旁路管道10上依次设置有预热器12和蒸汽发生器13，熔融盐蒸汽发生旁路管道6也依次穿过预热器12和蒸汽发生器13；所述熔融盐蒸汽发生旁路管道6上设置有熔融盐旁路管道14，预热器12和蒸汽发生器13均置于熔融盐旁路管道14的进口端和出口端之间的管段；所述低温熔融盐储罐8与高温熔融盐储罐9之间的管段上设置有熔融盐电加热器15；所述低温熔融盐储罐8上设置有低温熔融盐泵16，高温熔融盐储罐9上设置有高温熔融盐泵17，高温熔融盐泵17连接于熔融盐蒸汽发生旁路管道6，高温熔融盐泵17上设置有熔融盐蒸汽旁路管道18，熔融盐蒸汽旁路管道18的一端与高温熔融盐泵17连接，熔融盐蒸汽旁路管道18的另一端连接于B管道7；所述熔融盐蒸汽发生旁路管道6和B管道7之间设置有C管道 19，C管道19的一端连接于预热器12与熔融盐旁路管道14的进口端之间的管段上，C管道19的另一端连接于熔融盐蒸汽发生旁路管道6与低温熔融盐储罐8之间的管段上。
一种储能及其蒸汽发生方法，包括以下步骤：
当存在多余电能需要储能时，启动低温熔融盐泵16，将低温熔融盐储罐8的熔融盐抽出；来自低温熔融盐储罐8的熔融盐通过熔融盐电加热器15时，被熔融盐电加热器15加热成为高温熔融盐并储存在高温熔融盐储罐9中；
当释放能量时，关闭电极蒸汽锅炉1及熔融盐蒸汽旁路管道18，打开熔融盐蒸汽发生旁路管道6；锅炉除氧器2内的水通过给水泵11将水依次通过给水旁路管道10和A管道3，与来自高温熔融盐储罐9的高温熔融盐经由熔融盐蒸汽发生旁路管道6依次经过预热器12、蒸汽发生器13、蒸汽过热器4进行逆流换热，最后产生饱和蒸汽去对外供汽出口管道5；来自高温熔融盐储罐9的高温熔融盐依次经蒸汽过热器4、蒸汽发生器13、预热器12换热后，变为低温熔融盐经由C管道19回到低温熔融盐储罐8。
本发明的一种实施例的工作原理：本发明工作时，当存在多余电能需要储能时，启动低温熔融盐泵16，将低温熔融盐储罐8的熔融盐抽出；来自低温熔融盐储罐8的熔融盐通过熔融盐电加热器15时，被熔融盐电加热器15加热成为高温熔融盐并储存在高温熔融盐储罐9中；当释放能量时，关闭电极蒸汽锅炉1及熔融盐蒸汽旁路管道18，打开熔融盐蒸汽发生旁路管道6；锅炉除氧器2内的水通过给水泵11将水依次通过给水旁路管道10和A管道3，与来自高温熔融盐储罐9的高温熔融盐经由熔融盐蒸汽发生旁路管道6依次经过预热器12、蒸汽发生器13、蒸汽过热器4进行逆流换热，最后产生饱和蒸汽去对外供汽出口管道5；来自高温熔融盐储罐9的高温熔融盐依次经蒸汽过热器4、蒸汽发生器13、预热器12换热后，变为低温熔融盐经由C管道19回到低温熔融盐储罐8。

Claims (9)

  1. 一种储能及其蒸汽发生系统，包括电极蒸汽锅炉(1)，其特征在于，所述电极蒸汽锅炉(1)的一侧管道连接有锅炉除氧器(2)，电极蒸汽锅炉(1)的顶部设置有A管道(3)，所述A管道(3)上连接有蒸汽过热器(4)，所述蒸汽过热器(4)的出口处设置有外供汽出口管道(5)，蒸汽过热器(4)上设置有熔融盐蒸汽发生旁路管道(6)和B管道(7)，所述熔融盐蒸汽发生旁路管道(6)的一端与蒸汽过热器(4)连接，所述B管道(7)上连接有低温熔融盐储罐(8)，所述低温熔融盐储罐(8)上管道连接有高温熔融盐储罐(9)，熔融盐蒸汽发生旁路管道(6)的另一端与高温熔融盐储罐(9)连接。
  2. 根据权利要求1所述的一种储能及其蒸汽发生系统，其特征在于，所述电极蒸汽锅炉(1)与锅炉除氧器(2)之间的管段上设置有给水旁路管道(10)，所述给水旁路管道(10)的一端连接于电极蒸汽锅炉(1)与锅炉除氧器(2)之间的管段，给水旁路管道(10)的另一端连接于A管道(3)，给水旁路管道(10)进口端与锅炉除氧器(2)之间的管段上设置有给水泵(11)。
  3. 根据权利要求2所述的一种储能及其蒸汽发生系统，其特征在于，所述给水旁路管道(10)上依次设置有预热器(12)和蒸汽发生器(13)，熔融盐蒸汽发生旁路管道(6)也依次穿过预热器(12)和蒸汽发生器(13)。
  4. 根据权利要求3所述的一种储能及其蒸汽发生系统，其特征在于，所述熔融盐蒸汽发生旁路管道(6)上设置有熔融盐旁路管道(14)，预热器(12)和蒸汽发生器(13)均置于熔融盐旁路管道(14)的进口端和出口端之间的管段。
  5. 根据权利要求1所述的一种储能及其蒸汽发生系统，其特征在于，所述低温熔融盐储罐(8)与高温熔融盐储罐(9)之间的管段上设置有熔融盐电加热器(15)。
  6. 根据权利要求1所述的一种储能及其蒸汽发生系统，其特征在于，所述低温熔融盐储罐(8)上设置有低温熔融盐泵(16)，高温熔融盐储罐(9)上设置有高温熔融盐泵(17)，高温熔融盐泵(17)连接于熔融盐蒸汽发生旁路管道(6)，高温熔融盐泵(17)上设置有熔融盐蒸汽旁路管道(18)，熔融盐蒸汽旁路管道(18)的一端与高温熔融盐泵(17)连接，熔融盐蒸汽旁路管道(18)的另一端连接于B管道(7)。
  7. 根据权利要求4所述的一种储能及其蒸汽发生系统，其特征在于，所述熔融盐蒸汽发生旁路管道(6)和B管道(7)之间设置有C管道(19)，C管道(19)的一端连接于预热器(12)与熔融盐旁路管道(14)的进口端之间的管段上，C管道(19)的另一端连接于熔融盐蒸汽发生旁路管道(6)与低温熔融盐储罐(8)之间的管段上。
  8. 一种储能及其蒸汽发生方法，其特征在于，包括以下步骤：
    当存在多余电能需要储能时，启动低温熔融盐泵(16)，将低温熔融盐储罐(8)的熔融盐抽出；来自低温熔融盐储罐(8)的熔融盐通过熔融盐电加热器(15)时，被熔融盐电加热器(15)加热成为高温熔融盐并储存在高温熔融盐储罐(9)中；
    当释放能量时，锅炉除氧器(2)内的水通过给水泵(11)输送至电极蒸汽锅炉(1)中，并在电极蒸汽锅炉(1)中产生成饱和蒸汽；来自高温熔融盐储罐(9)的高温熔融盐通过高温熔融盐泵(17)后，经熔融盐旁路管道(14)后在蒸汽过热器(4)中与饱和蒸汽换热，产生过热蒸汽后去对外供汽出口管道(5)；高温熔融盐经换热后，一部分高温熔融盐变为低温熔融盐经由B管道(7)回到低温熔融盐储罐(8)；另一部分高温熔融盐依次经蒸汽过热器(4)、蒸汽发生器(13)、预热器(12)换热后，变为低温熔融盐经由C管道(19)回到低温熔融盐储罐(8)。
  9. 根据权利要求8所述的一种储能及其蒸汽发生方法，其特征在于，当释放能量时，关闭电极蒸汽锅炉(1)及熔融盐蒸汽旁路管道(18)，打开熔融盐蒸汽发生旁路管道(6)；锅炉除氧器(2)内的水通过给水泵(11)将水依次通过给水旁路管道(10)和A管道(3)，与来自高温熔融盐储罐(9)的高温熔融盐经由熔融盐蒸汽发生旁路管道(6)依次经过预热器(12)、蒸汽发生器(13)、蒸汽过热器(4)进行逆流换热，最后产生饱和蒸汽去对外供汽出口管道(5)；来自高温熔融盐储罐(9)的高温熔融盐依次经蒸汽过热器(4)、蒸汽发生器(13)、预热器(12)换热后，变为低温熔融盐经由C管道(19)回到低温熔融盐储罐(8)。
PCT/CN2022/094876 2021-12-29 2022-05-25 一种储能及其蒸汽发生系统及方法 WO2023123839A1 (zh)

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