CN111120105B - Pressurized-water heat storage-gas steam combined energy storage system and method - Google Patents
Pressurized-water heat storage-gas steam combined energy storage system and method Download PDFInfo
- Publication number
- CN111120105B CN111120105B CN201911303525.1A CN201911303525A CN111120105B CN 111120105 B CN111120105 B CN 111120105B CN 201911303525 A CN201911303525 A CN 201911303525A CN 111120105 B CN111120105 B CN 111120105B
- Authority
- CN
- China
- Prior art keywords
- water
- storage tank
- gas
- heat
- steam combined
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 216
- 238000004146 energy storage Methods 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000003860 storage Methods 0.000 claims abstract description 94
- 238000000197 pyrolysis Methods 0.000 claims abstract description 66
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 57
- 238000010248 power generation Methods 0.000 claims abstract description 43
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 239000007789 gas Substances 0.000 claims description 50
- 239000002918 waste heat Substances 0.000 claims description 12
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 7
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 7
- 229910052739 hydrogen Inorganic materials 0.000 claims description 7
- 239000001257 hydrogen Substances 0.000 claims description 7
- 238000009413 insulation Methods 0.000 claims description 7
- 239000000126 substance Substances 0.000 abstract description 4
- 238000005485 electric heating Methods 0.000 abstract description 2
- 239000000446 fuel Substances 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 8
- 239000010425 asbestos Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012983 electrochemical energy storage Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- BNOODXBBXFZASF-UHFFFAOYSA-N [Na].[S] Chemical compound [Na].[S] BNOODXBBXFZASF-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 235000019994 cava Nutrition 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
- F02C6/18—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use using the waste heat of gas-turbine plants outside the plants themselves, e.g. gas-turbine power heat plants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
- F03B13/06—Stations or aggregates of water-storage type, e.g. comprising a turbine and a pump
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
-
- 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
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses a pressurized water heat storage-gas steam combined energy storage system and a method, which comprises a low-pressure water storage tank, a high-pressure water storage tank, a pyrolysis reactor and a gas steam combined power generation system, wherein the low-pressure water storage tank is connected with the high-pressure water storage tank; a water outlet of the low-pressure water storage tank is communicated with a water inlet of the high-pressure water storage tank, and a booster pump and a heater are sequentially arranged between the low-pressure water storage tank and the high-pressure water storage tank along the water flow direction; the water outlet of the high-pressure water storage tank is communicated with the hot end water inlet of the pyrolysis reactor, the cold end inlet of the pyrolysis reactor is communicated with a normal-temperature normal-pressure liquid methanol supply pipeline, the cold end outlet of the pyrolysis reactor is communicated with the gas-steam combined power generation system, and the cold end outlet of the gas-steam combined power generation system is connected with the heat regenerator; the booster pump pressurizes and the electric heating energy stores the energy in water, and the electric energy is converted into the heat energy; the pyrolysis reactor finishes the release of stored heat energy, and converts the heat energy into chemical energy; the gas and steam combined power generation system utilizes clean fuel to realize power generation, realizes zero emission operation and has better economy.
Description
Technical Field
The invention belongs to the technical field of physical energy storage, and particularly relates to a pressurized water heat storage-gas steam combined energy storage system and method.
Background
The large-capacity energy storage technology can well solve the problem of large-range wind abandon in wind power generation, and effectively relieve the power generation grid connection problem caused by the fluctuation and the intermittence of wind energy. The construction of a large-capacity energy storage power station can absorb redundant electric power in the load valley period of the power grid, and the electric energy is converted into energy in other forms to be stored, so that the energy waste caused by 'wind abandon' is effectively avoided. At the peak period of the load of the power grid, the electric quantity demand of a user is increased, the electric energy generated by the power plant cannot meet the user, at the moment, the energy storage system starts to release the stored energy and converts the stored energy into the electric energy which can be directly used by the user, and the anti-jamming capability and the peak regulation capability of the power grid are enhanced. The energy storage system has important significance for the energy conservation and emission reduction career of China and plays a more powerful role in promoting the optimization of the energy structure of China.
Energy storage technologies can be divided into four major categories according to different energy storage modes: physical energy storage, electrochemical energy storage, phase change energy storage, and electromagnetic energy storage. The physical energy storage is energy storage according to the specific physical properties of substances, and comprises compressed air energy storage, pumped storage, flywheel energy storage and the like; electrochemical energy storage is energy storage according to the charge and discharge performance of chemical liquid, and sodium-sulfur batteries, lead-acid batteries and the like are available; the phase change energy storage comprises ice energy storage and paraffin heat storage; the electromagnetic energy storage is of various types, and the application is wide, namely super-capacitor energy storage and superconducting energy storage.
Of the above energy storage technologies, only compressed air energy storage and pumped storage are available for large-scale application, and both of the energy storage technologies have been commercialized worldwide. Although the pumped storage system is concerned by researchers at home and abroad, the system has high requirements on geographic environment and site selection conditions, the system construction period is long, and the energy storage technology is greatly limited by combining the actual environmental conditions of China, so that the requirement on the rapid development of wind power in China cannot be met. The compressed air energy storage system achieves flexible control of a power grid through absorbing and outputting electric energy, achieves the purpose of balancing power grid power load, can overcome the problems of intermittency and volatility in the renewable energy power generation process, improves the quality of the electric energy, achieves real-time management of the power supply and demand side of the power grid, and forms continuous and stable power supply and consumption. Compared with a pumped storage system, the compressed air energy storage system has the advantages of less site limitation (compressed air can be stored in underground mines, caves under karst, gas storage tanks, gypsum mines and the like), long service life, high safety and reliability, small influence on natural environment and the like. Although the compressed air energy storage technology has numerous advantages, the technology has high one-time investment cost and poor system economy, so that the large-scale commercial application of the compressed air energy storage system is limited.
Therefore, the invention provides a high-capacity energy storage technology with high operation efficiency, wide application range and high energy storage density, and has very important significance for improving the difficult problem of peak regulation of power grid operation in China and improving the electric energy utilization rate of a new energy power plant.
Disclosure of Invention
The invention aims to provide a pressurized water heat storage-gas steam combined energy storage system and a method, the system can greatly improve the problem of power storage, enhance the peak shaving capacity of a power grid and the operation reliability of the power grid, is not influenced by geographical environment, and is beneficial to improving the electric energy utilization rate of a new energy power plant.
In order to achieve the purpose, the invention adopts the technical scheme that the pressurized water heat storage-gas steam combined energy storage system comprises a low-pressure water storage tank, a high-pressure water storage tank, a pyrolysis reactor and a gas steam combined power generation system;
a water outlet of the low-pressure water storage tank is communicated with a water inlet of the high-pressure water storage tank, a booster pump and a heater are sequentially arranged between the low-pressure water storage tank and the high-pressure water storage tank along the water flow direction, and valves are arranged at an inlet of the booster pump and an outlet of the heater;
the water outlet of the high-pressure water storage tank is communicated with the hot end inlet of the pyrolysis reactor, the hot end outlet of the pyrolysis reactor is communicated with the hot water inlet of the heat regenerator or the gas-steam combined power generation system, the cold end inlet of the pyrolysis reactor is communicated with the normal-temperature normal-pressure liquid methanol supply pipeline, the cold end outlet of the pyrolysis reactor is communicated with the gas-steam combined power generation system, and the condensed water outlet of the gas-steam combined power generation system is connected with the heat regenerator.
A water outlet at the hot end of the pyrolysis reactor is communicated with an inlet of a heat regenerator, and an outlet of the heat regenerator is communicated with a water inlet of a low-pressure water storage tank; the structure of the heat regenerator is a plate type or shell-and-tube type heat exchange structure; a water turbine is arranged between the hot end water outlet of the pyrolysis reactor and the heat regenerator.
The water outlet of the high-pressure water storage tank is provided with a control valve, and the control valve adopts a constant pressure valve.
And a water outlet at the hot end of the pyrolysis reactor is communicated with a water inlet of a waste heat boiler in the gas-steam combined power generation system.
The heater is an electric heater or an electric boiler.
The outer walls of the low-pressure water storage tank and the high-pressure water storage tank are provided with heat insulation layers, and the outer wall of a pipeline in the gas and steam combined cycle is provided with a heat insulation layer.
The water in the low-pressure water storage tank enters the high-pressure water storage tank after being pressurized and heated for storing energy; high-temperature and high-pressure water enters the pyrolysis reactor from the high-pressure water storage tank to release heat energy to heat the methanol, and is discharged from a hot-end water outlet of the pyrolysis reactor; and hydrogen and carbon monoxide generated after the methanol pyrolysis enter the gas and steam combined power generation system from the outlet of the cold end of the pyrolysis reactor and are used as gas of the gas and steam combined power generation system.
And the heat of the condensed water of the gas and steam combined power generation system is recycled and then enters the low-pressure water storage tank.
And the hot end effluent of the pyrolysis reactor is used for applying work to a water turbine, exchanges heat with condensed water of the gas-steam combined power generation system, and then enters a low-pressure water storage tank.
The hot end effluent of the pyrolysis reactor is directly introduced into a gas and steam combined power generation system to be heated into high-temperature and high-pressure steam to apply work to a steam turbine, the high-temperature and high-pressure steam is condensed to obtain condensed water after applying work to the steam turbine, and the condensed water enters a low-pressure water storage tank after releasing heat.
Compared with the prior art, the invention has at least the following beneficial effects: the method comprises the steps that high-density electric energy storage is achieved by using water as an energy storage working medium, the water is pressurized and heated and stored in a high-pressure water tank, high-temperature high-pressure water enters a pyrolysis reactor, heat energy stored in the high-pressure water tank is absorbed by methanol through the pyrolysis reactor, hydrogen and carbon monoxide obtained after the methanol is pyrolyzed enter a gas-steam combined power generation system, work is done during combustion, tail gas generated after combustion heats cold water in steam circulation in the gas-steam combined power generation system to generate superheated steam, the superheated steam works a steam turbine, and finally waste heat of the gas-steam combined power generation system is utilized by a heat regenerator through which the waste heat passes; in the system, the booster pump unit is positioned in front of the heater and stores pressure energy; the electric heating finishes the large-capacity storage of electric energy, and the electric energy is converted into heat energy; the pyrolysis reactor finishes the release of stored heat energy, and converts the heat energy into chemical energy; the fuel gas and steam combined power generation system can be used for realizing high-density stored energy and high-efficiency utilization, realizes power generation by utilizing clean fuel, realizes zero-emission operation, and has better economy and wider application range.
Further, a hydraulic turbine is located after the pyrolysis reactor to release stored pressure energy.
Drawings
FIG. 1 is a schematic structural diagram of a pressurized water heat storage-gas steam combined energy storage system.
FIG. 2 is a schematic diagram of another embodiment of the pressurized water heat storage-gas steam combined energy storage system.
In the figure: 1. a low pressure water storage tank; 2. a first valve; 3. a booster pump; 4. a heater; 5. a valve; 6. a high-pressure water storage tank; 7. a control valve; 8. a pyrolysis reactor; 9. a third valve; 10. a fourth valve; 11. a combustion chamber; 12. a generator; 13. a compressor; 14. a turbine; 15. a waste heat boiler; 16. a steam turbine; 17. a condenser; 18. a fifth valve; 19. a sixth valve; 20. a heat regenerator; 21. a water turbine.
Detailed Description
The present invention will be described in detail below with reference to the following detailed description and the accompanying drawings.
As shown in fig. 1, the pressurized water heat storage-gas steam combined energy storage system comprises a low-pressure water storage tank 1, a high-pressure water storage tank 6, a pyrolysis reactor 8 and a gas steam combined power generation system; a water outlet of the low-pressure water storage tank 1 is communicated with a water inlet of the high-pressure water storage tank 6, a booster pump 3 and a heater 4 are sequentially arranged between the low-pressure water storage tank 1 and the high-pressure water storage tank 6 along the water flow direction, and valves are arranged at an inlet of the booster pump 3 and an outlet of the heater; the water outlet of the high-pressure water storage tank 6 is communicated with the hot end water inlet of the pyrolysis reactor 8, the hot end water outlet of the pyrolysis reactor 8 is communicated with the heat regenerator 20 or the hot water inlet of the gas and steam combined power generation system, the cold end inlet of the pyrolysis reactor 8 is communicated with the normal-temperature and normal-pressure liquid methanol supply pipeline, the cold end outlet of the pyrolysis reactor 8 is communicated with the gas and steam combined power generation system, and the condensed water outlet of the gas and steam combined power generation system is connected with the heat regenerator 20.
A water outlet at the hot end of the pyrolysis reactor 8 is communicated with an inlet of a heat regenerator 20, and an outlet of the heat regenerator 20 is communicated with a water inlet of a low-pressure water storage tank 1; regenerator 20 is a plate or shell and tube heat exchange structure.
A water turbine 21 is arranged between the hot end water outlet of the pyrolysis reactor 8 and the heat regenerator 20.
As shown in fig. 2, as an alternative embodiment of the present invention, a water outlet at the hot end of the pyrolysis reactor 8 is communicated with a water inlet of a waste heat boiler 15 in the gas-steam combined power generation system.
The outer walls of the low-pressure water storage tank 1 and the high-pressure water storage tank 6 are provided with heat insulation layers, and the outer wall of a pipeline in the gas and steam combined cycle is provided with a heat insulation layer.
The pressurized water heat storage-gas steam combined energy storage method comprises the following specific steps:
water in the low-pressure water storage tank 1 enters the high-pressure water storage tank 6 after being pressurized and heated for storing energy; high-temperature and high-pressure water enters the pyrolysis reactor 8 from the high-pressure water storage tank 6 to release heat energy to heat the methanol, and is discharged from a hot-end water outlet of the pyrolysis reactor 8; and hydrogen and carbon monoxide generated after the methanol pyrolysis enter the gas and steam combined power generation system from the outlet of the cold end of the pyrolysis reactor 8 and are used as gas of the gas and steam combined power generation system.
The heat of the condensed water of the gas and steam combined power generation system is recycled and then enters the low-pressure water storage tank 1.
The hot end outlet water of the pyrolysis reactor 8 is used for doing work on the water turbine 21, exchanges heat with the condensed water of the gas-steam combined power generation system, and then enters the low-pressure water storage tank 1.
The hot end outlet water of the pyrolysis reactor 8 is directly introduced into the gas and steam combined power generation system to be heated into high-temperature and high-pressure steam to apply work to the steam turbine, the high-temperature and high-pressure steam is condensed to obtain condensed water after applying work to the steam turbine, and the condensed water releases heat and then enters the low-pressure water storage tank 1.
The low pressure and the high pressure are relative concepts, the high pressure, the low pressure and the atmospheric pressure are reduced in sequence, and the specific pressure setting can be carried out according to the requirements and the conditions of the actual low-pressure water storage tank and the actual high-pressure water storage tank; the temperature of the high-pressure water storage tank is not lower than the pyrolysis temperature of the methanol, the pressure is the saturation pressure of water at the temperature, and the pressure of the low-pressure water storage tank is higher than the atmospheric pressure.
An outlet of the low-pressure water storage tank 1 is connected with an inlet of the booster pump unit 3, a first valve 2 is arranged on a pipeline between the outlet of the low-pressure water storage tank 1 and the inlet of the booster pump unit 3, an outlet of the booster pump unit 3 is connected with an inlet of the heater 4, and the heater 4 heats high-pressure water by using electric energy; the water outlet of the heater 4 is connected with the water inlet of the high-pressure water storage tank 6, a second valve 5 is arranged between the heater 4 and the high-pressure water storage tank 6, and the water inlet of the high-pressure water storage tank 6 is arranged at the top of the tank; the delivery port of high pressure water storage tank 6 is connected with the water inlet of pyrolytic reaction ware 8, is equipped with control flap 7 between high pressure water storage tank 6 and the pyrolytic reaction ware 8, and control flap 7 adopts singly not to be limited to the constant pressure valve. The hot end outlet of the pyrolysis reactor 8 is connected with the inlet of the water turbine 21, and the cold end outlet of the pyrolysis reactor 8 is connected with the air inlet of the combustion chamber 11.
The outlet water of the water turbine 21 should have a water head; the outlet of the water turbine 21 is connected with the inlet of the heat regenerator 20, the hot end inlet of the heat regenerator 20 is connected with the cold end outlet of the condenser 17, a sixth valve 19 is arranged on a pipeline between the hot end inlet of the heat regenerator 20 and the cold end outlet of the condenser 17, the hot end outlet of the heat regenerator 20 is communicated with the ambient atmosphere, and the cold end outlet is connected with the inlet of the low-pressure water storage tank 1.
A cold end inlet of the pyrolysis reactor 8 is communicated with a normal-temperature normal-pressure liquid methanol supply pipeline, the normal-temperature normal-pressure liquid methanol flows through a valve 10 and enters the cold end inlet of the pyrolysis reactor 8, a cold end outlet of the pyrolysis reactor 8 is connected with an air inlet of a combustion chamber 11, a gas compressor 13 is arranged in front of the combustion chamber 11, and a turbine 14 is arranged behind the combustion chamber 11; the outlet of the turbine 14 is connected with a waste heat boiler 15 in a steam Rankine cycle, the cold working medium in the boiler is liquid water from a condenser 17, the tail gas of the waste heat boiler 15 is directly discharged to the ambient atmosphere, and the exhaust temperature is set at 100-120 ℃.
The outlet of the cold end of the waste heat boiler 15 is connected with the inlet of the steam turbine 16, the condenser 17 is arranged behind the steam turbine 16, the outlet of the hot end of the condenser 17 is connected with the waste heat boiler 15, and a fifth valve 18 is arranged on a pipeline between the condenser 17 and the waste heat boiler 15.
The low-pressure water storage tank 1 and the high-pressure water storage tank 6 are externally wrapped with heat insulating materials such as asbestos, and the pipelines in the energy storage cycle and the gas and steam combined cycle are also wrapped with heat insulating materials such as asbestos.
The heater 4 is an electric heater or an electric boiler; the high-pressure water storage tank 6 and the low-pressure water storage tank 1 can be in the form of, but not limited to, column, sphere and other pressure-resistant tanks; regenerator 20 is of a conventional plate or shell and tube thermal configuration.
The control valve 7 is a constant pressure valve, but not limited to, and can be selected according to actual design requirements; the water head of the water turbine 21 is set according to the outlet pressure of the hot end working medium of the pyrolysis reactor 8.
The system utilizes booster pump unit 3 and heater 4 to accomplish the energy storage at electric load low ebb stage, utilizes steam gas combined cycle to accomplish the energy release at electric energy load peak stage.
As shown in fig. 1, in the electric energy surplus period/power grid load valley period of the new energy power plant, a first valve 2 and a second valve 5 are opened, other valves are closed, and surplus electric energy drives a booster pump 3 to pump water in a low-pressure water storage tank 1 into a high-pressure water storage tank 6; a heater 4 is arranged between the high-pressure water storage tank 6 and the booster pump 3 and is used for converting rich electric energy into heat energy of water; the form of the heater 4 is not limited to an electric heater or an electromagnetic heater, and the stage is a system energy storage stage, and all valves are closed after the energy storage stage is finished.
And in the peak period of the power load of the power grid, the control valve 7, the third valve 9, the fourth valve 10 and the fifth valve 18 are opened, water stored in the high-pressure water storage tank 6 enters the pyrolysis reactor 8 through the control valve 7, meanwhile, normal-temperature normal-pressure liquid methanol enters the pyrolysis reactor 8 through the valve 10, and the liquid methanol is pyrolyzed into carbon monoxide and hydrogen by the high-temperature high-pressure water.
The methanol is pyrolyzed into carbon monoxide and hydrogen by high-temperature high-pressure hot water in the pyrolysis reactor 8, and the cooled low-temperature high-pressure water flows out from a cold end outlet of the pyrolysis reactor 8 and enters a water turbine 21 to impact a water turbine blade to do work; carbon monoxide and hydrogen generated by the pyrolysis reactor 8 enter a combustion chamber 11 for combustion, generated high-temperature and high-pressure tail gas enters a turbine 14 for expansion to apply work to a generator and output electric energy, high-temperature tail gas generated by expansion in the turbine 14 enters a waste heat boiler 15 to heat water in steam circulation to superheated steam, the superheated steam expands in a turbine 16 for applying work, and tail gas of the turbine 16 enters a condenser 17 to be cooled into liquid water; the heat generated in the condenser enters the heat regenerator 20 to heat the low-temperature water output by the water turbine 21, and the water heated in the heat regenerator 20 enters the low-pressure water storage tank 1 to complete the energy release stage of the system.
The cracking temperature and the catalyst in the methanol pyrolysis reactor 8 are set according to the temperature of the high-pressure water storage tank 6.
As shown in fig. 2, the outer walls of the low-pressure water storage tank 1 and the high-pressure water storage tank 6 in the system adopt heat insulation materials to realize heat insulation and water storage; optionally, in the energy release process, high-pressure water at the outlet of the hot end of the pyrolysis reactor 8 does not pass through the water turbine 21, but is directly introduced into the exhaust-heat boiler 15 to be heated into high-temperature high-pressure steam, and enters the steam turbine 16 to perform expansion work, and enters the condenser 17 to be cooled and then is introduced into the low-pressure water storage tank 1.
Claims (10)
1. The pressurized-water heat storage-gas steam combined energy storage system is characterized by comprising a low-pressure water storage tank (1), a high-pressure water storage tank (6), a pyrolysis reactor (8) and a gas steam combined power generation system;
a water outlet of the low-pressure water storage tank (1) is communicated with a water inlet of the high-pressure water storage tank (6), a booster pump (3) and a heater (4) are sequentially arranged between the low-pressure water storage tank (1) and the high-pressure water storage tank (6) along the water flow direction, and valves are arranged at an inlet of the booster pump (3) and an outlet of the heater;
the water outlet of the high-pressure water storage tank (6) is communicated with the hot end inlet of the pyrolysis reactor (8), the hot end outlet of the pyrolysis reactor (8) is communicated with the hot water inlet of the heat regenerator (20) or the gas-steam combined power generation system, the cold end inlet of the pyrolysis reactor (8) is communicated with the liquid methanol supply pipeline at normal temperature and normal pressure, the cold end outlet of the pyrolysis reactor (8) is communicated with the gas-steam combined power generation system, and the condensed water outlet of the gas-steam combined power generation system is connected with the heat regenerator (20).
2. The pressurized water heat accumulation-gas steam combined energy storage system as claimed in claim 1, wherein a hot end water outlet of the pyrolysis reactor (8) is communicated with an inlet of the heat regenerator (20), and an outlet of the heat regenerator (20) is communicated with a water inlet of the low-pressure water storage tank (1); the structure of the heat regenerator (20) is a plate type or shell-and-tube type heat exchange structure; a water turbine (21) is arranged between the hot end water outlet of the pyrolysis reactor (8) and the heat regenerator (20).
3. The pressurized water heat storage-gas steam combined energy storage system as claimed in claim 2, wherein a control valve is arranged at the water outlet of the high-pressure water storage tank (6), and the control valve is a constant pressure valve.
4. The pressurized-water heat storage-gas-steam combined energy storage system as claimed in claim 1, wherein a water outlet at the hot end of the pyrolysis reactor (8) is communicated with a water inlet of a waste heat boiler (15) in the gas-steam combined power generation system.
5. The pressurized-water thermal-storage-gas-steam combined energy storage system according to claim 1, characterized in that the heater (4) is an electric heater or an electric boiler.
6. The pressurized water heat accumulation-gas steam combined energy storage system as claimed in claim 1, wherein the outer walls of the low-pressure water storage tank (1) and the high-pressure water storage tank (6) are provided with heat insulation layers, and the outer wall of a pipeline in the gas steam combined cycle is provided with a heat insulation layer.
7. The pressurized-water heat storage-gas steam combined energy storage method is characterized in that water in a low-pressure water storage tank (1) enters a high-pressure water storage tank (6) after being pressurized and heated for storing energy; high-temperature and high-pressure water enters the pyrolysis reactor (8) from the high-pressure water storage tank (6) to release heat energy to heat the methanol, and then is discharged from a hot-end water outlet of the pyrolysis reactor (8); and hydrogen and carbon monoxide generated after the methanol pyrolysis enter the gas and steam combined power generation system from the outlet of the cold end of the pyrolysis reactor (8) and are used as gas of the gas and steam combined power generation system.
8. The pressurized water heat storage-gas steam combined energy storage method as claimed in claim 7, characterized in that the heat of the condensed water of the gas steam combined power generation system is recycled and enters the low-pressure water storage tank (1).
9. The pressurized-water heat storage-gas steam combined energy storage method according to claim 7, characterized in that the hot-end outlet water of the pyrolysis reactor (8) is used for applying work to a water turbine (21), and enters the low-pressure water storage tank (1) after exchanging heat with the condensed water of the gas steam combined power generation system.
10. The pressurized water heat storage-gas steam combined energy storage method as claimed in claim 7, characterized in that the hot-end effluent of the pyrolysis reactor (8) is directly introduced into the gas steam combined power generation system to be heated to apply work to the turbine for high-temperature and high-pressure steam, the work is applied to the turbine and then condensed to obtain condensed water, and the condensed water releases heat and then enters the low-pressure water storage tank (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911303525.1A CN111120105B (en) | 2019-12-17 | 2019-12-17 | Pressurized-water heat storage-gas steam combined energy storage system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911303525.1A CN111120105B (en) | 2019-12-17 | 2019-12-17 | Pressurized-water heat storage-gas steam combined energy storage system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111120105A CN111120105A (en) | 2020-05-08 |
| CN111120105B true CN111120105B (en) | 2021-01-19 |
Family
ID=70498230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911303525.1A Active CN111120105B (en) | 2019-12-17 | 2019-12-17 | Pressurized-water heat storage-gas steam combined energy storage system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111120105B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112254361A (en) * | 2020-10-19 | 2021-01-22 | 中国科学院理化技术研究所 | Liquid air energy storage system adopting electric drive for air inlet precooling |
| CN113153473B (en) * | 2021-04-19 | 2022-12-09 | 西安交通大学 | Peak regulation system integrating compressed air and fuel gas steam circulation and operation method thereof |
| CN113958933B (en) * | 2021-09-26 | 2022-06-07 | 西安交通大学 | Composite energy system integrating multi-energy storage and hydrocarbon fuel preparation and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01244123A (en) * | 1988-03-25 | 1989-09-28 | Agency Of Ind Science & Technol | Manufacture of methanol decomposition reformed gas fuel |
| JPH11210493A (en) * | 1998-01-26 | 1999-08-03 | Toshiba Corp | Gas turbine plant |
| CN102797650A (en) * | 2011-05-27 | 2012-11-28 | 中国科学院工程热物理研究所 | Low-CO2-emisison solar energy and methanol complementary thermodynamic cycle system and method |
| CN104895675A (en) * | 2015-06-04 | 2015-09-09 | 中国科学院工程热物理研究所 | Solar energy and biomass complementary combined cycle power generating system capable of continuously running all day |
| CN105863764A (en) * | 2016-06-27 | 2016-08-17 | 湖南大学 | Combined thermodynamic cycle system |
| EP3242012A1 (en) * | 2014-12-31 | 2017-11-08 | Shenzhen Enesoon Science & Technology Co., Ltd. | Combined energy supply system of wind, photovoltaic, solar thermal power and medium-based heat storage |
-
2019
- 2019-12-17 CN CN201911303525.1A patent/CN111120105B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01244123A (en) * | 1988-03-25 | 1989-09-28 | Agency Of Ind Science & Technol | Manufacture of methanol decomposition reformed gas fuel |
| JPH11210493A (en) * | 1998-01-26 | 1999-08-03 | Toshiba Corp | Gas turbine plant |
| CN102797650A (en) * | 2011-05-27 | 2012-11-28 | 中国科学院工程热物理研究所 | Low-CO2-emisison solar energy and methanol complementary thermodynamic cycle system and method |
| EP3242012A1 (en) * | 2014-12-31 | 2017-11-08 | Shenzhen Enesoon Science & Technology Co., Ltd. | Combined energy supply system of wind, photovoltaic, solar thermal power and medium-based heat storage |
| CN104895675A (en) * | 2015-06-04 | 2015-09-09 | 中国科学院工程热物理研究所 | Solar energy and biomass complementary combined cycle power generating system capable of continuously running all day |
| CN105863764A (en) * | 2016-06-27 | 2016-08-17 | 湖南大学 | Combined thermodynamic cycle system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111120105A (en) | 2020-05-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111120105B (en) | Pressurized-water heat storage-gas steam combined energy storage system and method | |
| CN102758690B (en) | Efficient high-pressure liquid air energy storage/release system | |
| CN102758748B (en) | High-pressure liquid air energy storage/release system | |
| CN114233417B (en) | Heat storage type deep flexible peak regulation thermal power generation system and heat storage and release method | |
| CN108800628B (en) | Combined heat and power system based on solar thermochemical energy storage | |
| CN114382559B (en) | Double-medium heat storage type peak regulation thermal power generation system and heat storage and release method | |
| CN214660744U (en) | Compressed air energy storage system based on heat storage and release shared loop | |
| CN215170241U (en) | Energy storage peak regulation coupling system of thermal power plant | |
| CN202811079U (en) | High-efficiency and high-pressure liquid air energy storage/ release system | |
| CN111456825A (en) | Cold-hot integrated constant-pressure storage tank type compressed air energy storage system and method | |
| CN111102142A (en) | Tower type solar thermal power generation system based on supercritical fluid | |
| CN112943393B (en) | Geothermal energy thermochemistry and compressed air composite energy storage system and operation method thereof | |
| CN113756953A (en) | Gas turbine power generation system and power generation method | |
| CN112983565A (en) | Thermal power generating unit steam extraction auxiliary frequency modulation peak regulation system based on heat storage | |
| CN115031283B (en) | Thermoelectric flexible storage and supply system and operation method thereof | |
| CN215170237U (en) | Flexible peak shaving system of thermal power plant based on heat storage | |
| CN113153471B (en) | Compressed air composite energy storage system for old thermal power plant boiler transformation and operation method thereof | |
| CN212838198U (en) | Hot-melt salt heat storage ocean temperature difference energy-solar energy combined hydrogen energy production system | |
| CN113865120A (en) | Oxygen-enriched combustion decarburization integrated system with solar-assisted gas and steam combined cycle | |
| CN115405383A (en) | Heat storage-based flexible peak regulation system and method for thermal power plant | |
| CN111677639A (en) | Hot-melt salt heat storage ocean temperature difference energy-solar energy combined hydrogen energy production system | |
| CN104165071B (en) | Open-close coupling type thermodynamic cycle method based on liquefied air heat-to-power conversion | |
| CN218523546U (en) | Multistage heat storage system of thermal power generating unit | |
| CN219571892U (en) | Coal-fired unit starting and thermoelectric decoupling system based on chemical chain energy storage | |
| CN114963281B (en) | Combined heat and power generation system with energy storage system and coal-fired unit coupled and operation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |