Ultra-high pressure heat storage system and method for generating industrial steam

Abstract

This invention discloses an ultra-high-pressure heat storage system and method for generating industrial steam. The heat storage system consists of six components: a water treatment module A, a high-pressure water heating module B, a remote signal acquisition and processing module C, a heat storage module D, a steam heating module E, and a pipeline connection and control module F. The high-pressure water heating module heats the heat storage medium, while the heat storage module also stores and releases the heat. This system uses high-pressure purified water as the energy storage medium, converting electrical energy into thermal energy during periods of low electricity demand and storing it. It can also produce industrial steam when needed, enabling deep peak regulation in power grids and alleviating peak regulation pressure.

Description

Technical Field

[0001] The invention relates to an ultra-high pressure heat storage system and method for generating industrial steam, belonging to the field of heat storage. Background Art

[0002] Phase change thermal storage technology has a wide range of applications in solar power generation, industrial waste heat recovery, and distributed energy systems. In the field of medium- and high-temperature heat storage, inorganic salt-based phase change thermal storage materials and metal / alloy-based phase change thermal storage materials have been extensively researched and applied. Using these materials to produce industrial steam generally involves heat exchange, which inevitably results in heat and exergy losses. These issues increase the complexity of molten salt thermal storage systems and reduce the overall economic viability of molten salt thermal storage technology for industrial steam production.

[0003] Utilizing low-cost electricity, such as off-peak electricity, for production not only reduces factory production costs but also has significant environmental implications. High-pressure water is an excellent heat storage material. Flash evaporation can directly produce relatively low-temperature industrial steam. Combined with the purified water system of a factory or thermal power plant, this allows for the construction of a low-cost heat storage system. This energy storage technology, combining high-pressure water with low-cost electricity to store heat and produce industrial steam, can reduce both factory production and construction costs. Its application in deep peak-shaving applications can also alleviate peak-shaving pressure on the power grid. Summary of the Invention

[0004] The present invention aims to provide an ultra-high-pressure heat storage system and method for generating industrial steam. This system uses high-pressure purified water as the energy storage medium, converting electrical energy into thermal energy for storage during periods of low electricity consumption. It then produces industrial steam when needed, which can be applied to the deep peak regulation of power grids to reduce peak regulation pressure on the grid.

[0005] The present invention provides an ultra-high-pressure heat storage system and method for generating industrial steam. During the heat storage phase, the system uses electric heating to heat high-pressure water and stores it in a heat storage tank. During the heat release phase, the required industrial steam is obtained through flash evaporation in the heat storage tank combined with electric compensating heating.

[0006] This invention provides an ultra-high-pressure heat storage system and method for generating industrial steam. The heat storage system consists of six components: a water treatment module A, a high-pressure water heating module B, a remote signal acquisition and processing module C, a heat storage module D, a steam heating module E, and a pipeline connection and control module F. The heat storage medium is heated in the high-pressure water heating module, and the heat storage and heat release process is performed in the heat storage module. Figure 1The reclaimed water treatment module A, high-pressure water heating module B, remote signal acquisition and processing module C, heat storage module D, and steam heating module E are all marked with shaded dashed boxes, while the components of the pipeline connection and control module F are relatively dispersed and not marked. For ease of description, the present invention uses the following nomenclature for the different working fluids in the system: water from the waterworks is designated as municipal water, water filtered by the water treatment equipment is designated as first atmospheric water, water flowing through the cold water section of the heat exchanger is designated as second atmospheric water, water heated in the high-pressure water heating tank is designated as first high-pressure water, water remaining after flash evaporation is designated as second high-pressure water, water flowing through the hot water section of the heat exchanger is designated as third high-pressure water, saturated steam from the heat storage tank is designated as first high-pressure steam, and steam after compensatory heating in the steam heating tank is designated as second high-pressure steam.

[0007] The piping connection and control module serves as the process control module for the entire thermal storage system and includes steel pipes, first and second normal water pumps, first and third high-pressure pumps, first to seventh tees, first to nineteenth solenoid valves, and first to sixteenth flowmeters. The steel pipes serve as interconnecting components for the entire system (excluding the remote signal acquisition and processing module). The normal water pumps operate at room temperature and pressure, providing only power for the flow of the working fluid without pressurizing it. Furthermore, the first normal water pump is located between the normal water tank and the water treatment equipment, while the second normal water pump is located between the first and second purified water tanks. The high-pressure pumps are all high-pressure boiler feed pumps. Furthermore, the first high-pressure pump is located between the first flowmeter and the second solenoid valve and operates at room temperature, directly pressurizing the working fluid to the required first high-pressure water pressure. The second high-pressure pump is located between the fourth solenoid valve and the eleventh flowmeter and pressurizes the third high-pressure water to the required first high-pressure water pressure. The third high-pressure pump is located between the sixth and thirteenth solenoid valves and does not pressurize the working fluid. The three-way pipe, the solenoid valve, and the flow meter in the present invention must all meet the pressure and temperature requirements during system operation, and must also adopt a suitable sealing method according to the temperature and pressure of the system operation.

[0008] The water treatment module includes a common water tank, water treatment equipment, a first purified water tank, a second purified water tank, a first insulation layer, and a heat exchanger. The common water tank stores municipal water, and the common water tank is connected to the water treatment equipment through a first solenoid valve and a first common water pump. The water treatment equipment is connected to the first purified water tank. Furthermore, the water treatment equipment must meet the purification standards of the "Water Vapor Standard for Thermal Power Plants" to maintain the safe and stable operation of the entire system; the volume of the first purified water tank must ensure the water consumption required for a single operation of the system. The first purified water tank is connected in sequence to the third flow meter, the second common water pump, the fifth solenoid valve, the heat exchanger, and finally the second purified water tank. The second purified water tank is wrapped with a first insulation layer, and the volume of the second purified water tank must ensure the water consumption required for a single operation of the system. The heat exchanger is a key component to ensure the normal operation of the third high-pressure pump. Furthermore, the cold water inlet of the heat exchanger is connected to the fifth solenoid valve, the cold water outlet of the heat exchanger is connected to the second purified water tank, the hot water inlet of the heat exchanger is connected to the fifth three-way pipe, and the hot water outlet of the heat exchanger is connected to the sixth solenoid valve. The sixth solenoid valve is connected to the third high-pressure pump.

[0009] The high-pressure water heating module includes an AC power supply, a first electric heating wire, a high-pressure water heating tank, a second insulation layer, a first on-site pressure gauge, and a first on-site thermometer. The high-pressure water heating tank is wrapped with a second insulation layer, and the first electric heating wire is evenly distributed inside the tank. The first electric heating wire is connected to the AC power supply. Furthermore, the AC power supply adopts 10,000 V industrial electricity, and the electric heating wire can be made of iron-chromium-aluminum alloy or nickel-chromium alloy with good high-temperature strength. A first on-site thermometer and a first on-site pressure gauge are provided near the fluid outlet of the high-pressure water heating tank for on-site observation of the state of the high-pressure water in the high-pressure water heating tank; the working fluid outlet of the high-pressure water heating tank is connected to the control module through a pipeline and is respectively connected to the first to Nth heat storage tanks in the heat storage module. The working fluid inlet of the high-pressure water heating tank is connected to the second flow meter and the first three-way pipe in sequence through a steel pipe. One side of the first three-way pipe is connected to the second solenoid valve, the first high-pressure pump, the first flow meter, and finally connected to the second purified water tank of the water treatment module; the other side is connected to the fourth solenoid valve, the second high-pressure pump, the eleventh flow meter, the fifteenth solenoid valve, and the N+1 heat storage tank in sequence through a steel pipe.

[0010] The heat storage module includes N+1 heat storage tanks and their supporting equipment. The N+1 heat storage tanks include a first heat storage tank, a second heat storage tank, ..., an Nth heat storage tank, and an N+1th heat storage tank. The supporting equipment of the first to Nth heat storage tanks include an on-site pressure gauge, an on-site thermometer, an on-site liquid level gauge, a remote pressure gauge, a remote thermometer, a remote liquid level gauge, an insulation layer, an auxiliary heating line, and a steam-water separator. Furthermore, the steam-water separator can filter small water droplets or water mist in the flash steam to improve the quality of the flash steam; the supporting equipment of the N+1th heat storage tank includes the N+2th on-site pressure gauge, the N+2th on-site thermometer, the N+1th on-site liquid level gauge, the N+1th remote pressure gauge, the N+1th remote thermometer, the N+1th remote liquid level gauge, the N+3th insulation layer, and the N+1th auxiliary heating line; further, the on-site pressure gauge, the on-site thermometer, and the on-site liquid level gauge are used to display the working status of the heat storage tank on-site, the remote pressure gauge, the remote thermometer, and the remote liquid level gauge are connected to the data collector via a data transmission line, and the signal is finally output to the computer. The liquid level gauge needs to compensate for the liquid level according to actual conditions during long-term operation. The volume and wall thickness of the N+1 heat storage tanks are identical, and they are all wrapped with auxiliary heating wires, which are then wrapped in an insulation layer. Furthermore, the top of the first heat storage tank is a first high-pressure steam outlet, which is connected in sequence to the fifteenth solenoid valve, the twelfth flowmeter, and the sixth three-way pipe via a steel pipe; the bottom is a second high-pressure water outlet, which is connected in sequence to the eighth solenoid valve, the fifth flowmeter, and the fourth three-way pipe; the left side is a first high-pressure water inlet, which is connected in sequence to the fourth flowmeter, the seventh solenoid valve, and the second three-way pipe; and a first steam-water separator is installed inside the first heat storage tank. The top of the second heat storage tank is a first high-pressure steam outlet, which is connected in sequence to the sixteenth solenoid valve, the thirteenth flowmeter, and the sixth three-way pipe; the bottom is a second high-pressure water outlet, which is connected in sequence to the tenth solenoid valve, the seventh flowmeter, and the fourth three-way pipe; the left side is a first high-pressure water inlet, which is connected in sequence to the sixth flowmeter, the ninth solenoid valve, and the third three-way pipe; and a second steam-water separator is installed inside the second heat storage tank. The Nth heat storage tank has a first high-pressure steam outlet at its top, connected sequentially to the 17th solenoid valve, the 14th flowmeter, and the 7th tee. Its lower portion features a second high-pressure water outlet, connected sequentially to the 12th solenoid valve, the 9th flowmeter, and the 5th tee. Its left side features a first high-pressure water inlet, connected sequentially to the 8th flowmeter, the 11th solenoid valve, and the 3rd tee. An Nth steam-water separator is installed within the Nth heat storage tank. To facilitate the recycling of high-pressure water, an N+1 heat storage tank is provided. This N+1 heat storage tank does not function as a heat storage tank. Its left side features a third high-pressure water inlet, connected sequentially to the 10th flowmeter, the 13th solenoid valve, and the 3rd high-pressure pump. Its lower portion features a third high-pressure water outlet, connected sequentially to the 14th solenoid valve, the 11th flowmeter, and the 2nd high-pressure pump.Furthermore, the steam-water separator adopts a two-stage steam-water separation device: the first-stage steam-water separation device adopts a tangential guide vane cyclone separator or a vertical throttle plate steam-water separator to eliminate the kinetic energy of the steam-water mixture and perform preliminary separation of the steam; the second-stage steam-water separation device adopts a corrugated plate separator to separate the fine water droplets carried in the steam.

[0011] The steam heating module includes a steam heating tank, an N+4 insulation layer, a second electric heating wire, an N+3 local thermometer, an N+3 local pressure gauge, and a pressure reducing valve. The steam heating tank is provided with a second electric heating wire inside, and is wrapped with an N+4 insulation layer on the outside. An N+3 local thermometer and an N+3 local pressure gauge are provided on the top. The N+3 local pressure gauge and the N+3 local thermometer are used to measure the state of the second high-pressure steam at the outlet of the steam heating tank; the second electric heating wire compensates for the heating of the saturated steam to obtain suitable steam; the pressure reducing valve reduces the pressure of the steam with a higher pressure that may exist during the flash evaporation process, and the pressure reducing valve cooperates with the second electric heating wire to ensure that all the steam after the flash evaporation is converted into qualified steam.

[0012] The remote signal acquisition and processing module includes a data transmission line, a data collector, and a computer. The data transmission line ensures the connection between the data collector and the remote pressure gauges, remote thermometers, and remote liquid level gauges in the thermal storage module and steam generation module. Remote data is collected by the data collector and entered into the computer, which processes and corrects the data signals from the remote pressure gauges, remote thermometers, and remote liquid level gauges.

[0013] Beneficial effects of the present invention:

[0014] (1) The present invention uses purified water as the heat storage medium and can be modified based on the existing water purification equipment in factories or thermal power plants, thus achieving a low-cost modification solution;

[0015] (2) When the residual water after flash evaporation is reheated, the N+1 heat storage tank is used in conjunction with the auxiliary heating line from the first to the Nth heat storage tanks, which can effectively avoid the safety hazard caused by the thermal stress of the heat storage tank due to uneven heating when the working medium is heated;

[0016] (3) The heat storage temperature can reach 250℃-350℃, the pressure can reach 4 MPa-16 MPa, and the mass heat storage density can reach up to 1300 kJ . kg -1 , the volumetric heat storage density can reach 0.78 GJ . m -3 , which is comparable to the energy density of chemical heat storage and 3-5 times that of sensible heat or other phase change heat storage, and can store a large amount of heat energy in a smaller volume;

[0017] (4) Both the energy storage medium and the steam product are derived from water, which is a different phase of water. This eliminates the heat exchange link between the heat storage medium and water or steam in other heat storage systems. There is no heat exchange loss, and the steam release adjustment is flexible and convenient. Steam can be released according to demand. At the same time, the heat storage process is forced convection, which can ensure high-power heat storage and is easy to deploy in peak-shaving scenarios such as thermal power plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of the ultra-high pressure heat storage system for generating steam according to the present invention.

[0019] In the figure: 1- ordinary water tank; 2- municipal water; 3- first solenoid valve; 4- first ordinary water pump; 5- water treatment equipment; 6- first purified water tank; 7- first insulation layer; 8- second purified water tank; 9- first flow meter; 10- first high-pressure pump; 11- second solenoid valve; 12- steel pipe; 13- first tee; 14- second flow meter; 15- first electric heating wire; 16- high-pressure water heating tank; 17- second insulation layer; 18- first on-site pressure gauge; 19- first on-site thermometer; 20- AC power supply; 21- third solenoid valve; 22- fourth solenoid valve; 23- second high-pressure pump; 24- second tee; 25- third tee; 26- fourth tee; 27- fifth tee; 28- third flow meter ;29-second ordinary water pump;30-fifth solenoid valve;31-heat exchanger;32-sixth solenoid valve;33-third high-pressure pump;34-seventh solenoid valve;35-fourth flowmeter;36-fifth flowmeter;37-eighth solenoid valve;38-ninth solenoid valve;39-sixth flowmeter;40-seventh flowmeter;41-tenth solenoid valve;42-eleventh solenoid valve;43-eighth flowmeter;44-ninth flowmeter;45-twelfth solenoid valve;46-thirteenth solenoid valve;47-tenth flowmeter;48-eleventh flowmeter;49-fourteenth solenoid valve;50-first heat storage tank;51-first auxiliary heating line;52-third insulation layer;53-second on-site pressure gauge;54-second on-site thermometer;55-first steam Water separator; 56-first remote pressure gauge; 57-first remote thermometer; 58-first remote level gauge; 59-first local level gauge; 60-second heat storage tank; 61-second auxiliary heating line; 62-fourth insulation layer; 63-third local pressure gauge; 64-third local thermometer; 65-second steam-water separator; 66-second remote pressure gauge; 67-second remote thermometer; 68-second remote level gauge; 69-second local level gauge; 70-Nth heat storage tank; 71-Nth auxiliary heating line; 72-N+2th insulation layer; 73-N+1th local pressure gauge; 74-N+1th local thermometer; 75-Nth steam-water separator; 76-Nth remote pressure gauge; 77-Nth remote thermometer; 78-Nth remote level gauge 1-N+1 thermal storage tank; 81-N+1 auxiliary heating line; 82-N+3 thermal insulation layer; 83-N+2 local pressure gauge; 84-N+2 local thermometer; 85-N+1 remote pressure gauge; 86-N+1 remote thermometer; 87-N+1 remote liquid level gauge; 88-N+1 local liquid level gauge; 89-15th solenoid valve; 90-12th flow meter; 91-16th solenoid valve; 92-13th flow meter; 93-17th solenoid valve; 94-14th flow meter; 95-6th tee pipe; 96-7th tee pipe; 97-18th solenoid valve; 98-15th flow meter; 99-pressure reducing valve; 100-19th solenoid valve; 101-N+4 thermal insulation layer;102 - steam heating tank; 103 - second electric heating wire; 104 - N+3rd local pressure gauge; 105 - N+3rd local temperature gauge; 106 - sixteenth flow meter; 107 - data transmission line; 108 - data collector; 109 - computer. DETAILED DESCRIPTION

[0020] The present invention is further illustrated by the following examples, but is not limited to the following examples. Example 1

[0021] like Figure 1 As shown, an ultra-high-pressure heat storage system for generating industrial steam is divided into six parts: water treatment module A, high-pressure water heating module B, remote signal acquisition and processing module C, heat storage module D, steam heating module E, and pipeline connection and control module F. It is characterized in that the heating of the heat storage medium is completed in the high-pressure water heating module, and the storage and release of the heat storage medium are completed in the heat storage module. Figure 1 The reclaimed water treatment module A, high-pressure water heating module B, remote signal acquisition and processing module C, heat storage module D, and steam heating module E are all marked with shaded dashed boxes, while the components of the pipeline connection and control module F are relatively dispersed and not marked. For ease of description, the present invention uses the following nomenclature for the different working fluids in the system: water from the waterworks is designated as municipal water, water filtered by the water treatment equipment is designated as first atmospheric water, water flowing through the cold water section of the heat exchanger is designated as second atmospheric water, water heated in the high-pressure water heating tank is designated as first high-pressure water, water remaining after flash evaporation is designated as second high-pressure water, water flowing through the hot water section of the heat exchanger is designated as third high-pressure water, saturated steam from the heat storage tank is designated as first high-pressure steam, and steam after compensatory heating in the steam heating tank is designated as second high-pressure steam.

[0022] The pipeline connection and control module serves as the process control module for the entire thermal storage system and includes steel pipes, first and second normal water pumps, first and third high-pressure pumps, first to seventh tees, first to nineteenth solenoid valves, and first to sixteenth flowmeters. The steel pipes serve as interconnecting components for the entire system (excluding the remote signal acquisition and processing module). The normal water pumps operate at room temperature and pressure, providing only power for the flow of the working fluid without pressurizing it. Furthermore, the first normal water pump 4 is located between the normal water tank 1 and the water treatment equipment 5, and the second normal water pump 29 is located between the first purified water tank 6 and the heat exchanger 31. The high-pressure pumps are all high-pressure boiler feed pumps. Furthermore, the first high-pressure pump 10 is located between the first flowmeter and the second solenoid valve and operates at room temperature, directly pressurizing the working fluid to the required first high-pressure water pressure. The second high-pressure pump 23 is located between the fourth solenoid valve and the eleventh flowmeter and pressurizes the third high-pressure water to the required first high-pressure water pressure. The third high-pressure pump 33 is located between the sixth and thirteenth solenoid valves and does not pressurize the working fluid. The three-way pipe, the solenoid valve, and the flow meter in this embodiment must all meet the pressure and temperature requirements during system operation, and a suitable sealing method must be used according to the temperature and pressure of the system operation.

[0023] The water treatment module includes a common water tank 1, a water treatment device 5, a first purified water tank 6, a second purified water tank 8, a first insulation layer 7, and a heat exchanger 31. The common water tank stores municipal water 2, and the common water tank is connected to the water treatment device through a first solenoid valve 3 and a first common water pump 4. The water treatment device 5 is connected to the first purified water tank 6. Furthermore, the water treatment device must meet the purification standards of the "Water Vapor Standard for Thermal Power Plants" to maintain the safe and stable operation of the entire system; the volume of the first purified water tank must ensure the water required for a single operation of the system. The first purified water tank 6 is connected in sequence to the third flow meter 28, the second common water pump 29, the fifth solenoid valve 30, and the heat exchanger 31, and finally to the second purified water tank 8. The second purified water tank 8 is wrapped with a first insulation layer 7. The volume of the second purified water tank must ensure the water required for a single operation of the system. The heat exchanger is a key component to ensure the normal operation of the third high-pressure pump. Furthermore, the cold water inlet of the heat exchanger is connected to the fifth solenoid valve, the cold water outlet of the heat exchanger is connected to the second purified water tank, the hot water inlet of the heat exchanger is connected to the fifth three-way pipe, and the hot water outlet of the heat exchanger is connected to the sixth solenoid valve. The sixth solenoid valve is connected to the third high-pressure pump.

[0024] The high-pressure water heating module includes an AC power supply 20, a first electric heating wire 15, a high-pressure water heating tank 16, a second insulation layer 17, a first on-site pressure gauge 18, and a first on-site thermometer 19. The high-pressure water heating tank 16 is wrapped with a second insulation layer 17, and the first electric heating wire 15 is evenly distributed inside the tank. The first electric heating wire is connected to the AC power supply 20. Furthermore, the AC power supply uses 10,000 V industrial electricity, and the electric heating wire can be made of iron-chromium-aluminum alloy or nickel-chromium alloy with good high-temperature strength. A first on-site thermometer and a first on-site pressure gauge are provided near the fluid outlet of the high-pressure water heating tank for on-site observation of the state of the high-pressure water in the high-pressure water heating tank; the working fluid outlet of the high-pressure water heating tank is connected to the control module through a pipeline and is respectively connected to the first to Nth heat storage tanks in the heat storage module. The working fluid inlet of the high-pressure water heating tank is connected to the second flowmeter and the first three-way pipe in sequence through a steel pipe. One side of the first three-way pipe is connected to the second solenoid valve, the first high-pressure pump, the first flow meter, and finally connected to the second purified water tank of the water treatment module; the other side is connected to the fourth solenoid valve, the second high-pressure pump, the eleventh flow meter, the fifteenth solenoid valve, and the N+1 heat storage tank in sequence through a steel pipe.

[0025] The heat storage module includes N+1 heat storage tanks and their supporting equipment. The N+1 heat storage tanks include a first heat storage tank 50, a second heat storage tank 60, ..., an Nth heat storage tank 70, and an N+1th heat storage tank 80. The supporting equipment for the first to Nth heat storage tanks includes an on-site pressure gauge, an on-site thermometer, an on-site liquid level gauge, a remote pressure gauge, a remote thermometer, a remote liquid level gauge, an insulation layer, an auxiliary heating wire, and a steam-water separator; the supporting equipment for the N+1th heat storage tank includes the N+2th on-site pressure gauge, the N+2th on-site thermometer, the N+1th on-site liquid level gauge, the N+1th remote pressure gauge, the N+1th remote thermometer, the N+1th remote liquid level gauge, the N+3th insulation layer, and the N+1th auxiliary heating wire; furthermore, the on-site pressure gauge, the on-site thermometer, and the on-site liquid level gauge are used to display the working status of the heat storage tank on-site, and the remote pressure gauge, remote thermometer, and remote liquid level gauge are connected to the data collector via a data transmission line and ultimately output the signal to the computer. During long-term operation, the liquid level gauge needs to compensate for the liquid level according to actual conditions. The volume and wall thickness of the N+1 heat storage tanks are exactly the same, and the auxiliary heating wires are wrapped around them, and the auxiliary heating wires are wrapped with insulation layers. Furthermore, the upper part of the first heat storage tank 50 is a first high-pressure steam outlet, which is connected to the fifteenth solenoid valve 89, the twelfth flowmeter 90, the sixth three-way pipe 95 in sequence through a steel pipe, and finally connected to the steam heating tank; the lower part is a second high-pressure water outlet, which is connected to the eighth solenoid valve 37, the fifth flowmeter 36, the fourth three-way pipe 26 in sequence, then through the heat exchanger 31, the third high-pressure pump 33, the thirteenth solenoid valve 46, and finally connected to the N+1 heat storage tank; the left side is a first high-pressure water inlet, which is connected to the fourth flowmeter 35, the seventh solenoid valve 34, and the second three-way pipe 24 in sequence, and the left side of the second three-way pipe passes through the solenoid valve and is connected to the high-pressure water heater; a first steam-water separator 55 is installed inside the first heat storage tank. The second heat storage tank has a first high-pressure steam outlet at its top, connected sequentially to a sixteenth solenoid valve 91, a thirteenth flowmeter 92, and a sixth three-way pipe 95. Its lower portion has a second high-pressure water outlet, connected sequentially to a tenth solenoid valve 41, a seventh flowmeter 40, and a fourth three-way pipe 26. Its left side has a first high-pressure water inlet, connected sequentially to a sixth flowmeter 39, a ninth solenoid valve 38, and a third three-way pipe 25. A second steam-water separator 65 is installed within the second heat storage tank. The Nth heat storage tank has a first high-pressure steam outlet at its top, connected sequentially to a seventeenth solenoid valve 93, a fourteenth flowmeter 94, and a seventh three-way pipe 96. Its lower portion has a second high-pressure water outlet, connected sequentially to a twelfth solenoid valve 45, a ninth flowmeter 44, and a fifth three-way pipe 27. Its left side has a first high-pressure water inlet, connected sequentially to an eighth flowmeter 43, an eleventh solenoid valve 42, and a third three-way pipe 25. An Nth steam-water separator 75 is installed within the Nth heat storage tank.To facilitate the recycling of high-pressure water, an N+1 heat storage tank is provided. This tank is not used as a heat storage tank. Its left side houses the third high-pressure water inlet, connected sequentially to the tenth flowmeter 47, the thirteenth solenoid valve 46, and the third high-pressure pump 33. Its lower portion houses the third high-pressure water outlet, connected sequentially to the fourteenth solenoid valve 49, the eleventh flowmeter 48, and the second high-pressure pump 23. Furthermore, the steam-water separator utilizes a two-stage steam-water separator: the first stage utilizes a tangential guide vane cyclone separator or a vertical throttle plate steam-water separator to eliminate the kinetic energy of the steam-water mixture and perform preliminary steam separation; the second stage utilizes a corrugated plate separator to separate fine water droplets carried in the steam.

[0026] The steam heating module includes a steam heating tank 102, an N+4 insulation layer 101, a second electric heating wire 103, an N+3 local thermometer 105, an N+3 local pressure gauge 104, and a pressure reducing valve 99. The steam heating tank is provided with a second electric heating wire 103 inside, which is wrapped with an N+4 insulation layer 101 on the outside, and is provided with an N+3 local thermometer and an N+3 local pressure gauge on the top. The N+3 local pressure gauge and the N+3 local thermometer are used to measure the state of the second high-pressure steam at the outlet of the steam heating tank; the second electric heating wire compensates for the heating of the saturated steam to obtain suitable steam; the pressure reducing valve reduces the pressure of the steam with a higher pressure that may exist during the flash evaporation process, and the pressure reducing valve cooperates with the second electric heating wire to ensure that all the steam after the flash evaporation is converted into qualified steam.

[0027] The remote signal acquisition and processing module includes a data transmission line 107, a data collector 108, and a computer 109. The data transmission line ensures the connection between the data collector and the remote pressure gauges, remote thermometers, and remote liquid level gauges in the thermal storage module and the steam generation module. Remote data is collected by the data collector and entered into the computer, which processes and corrects the data signals from the remote pressure gauges, remote thermometers, and remote liquid level gauges.

[0028] This embodiment also provides a method for using the ultra-high pressure heat storage system, the specific process is as follows:

[0029] The first operation and re-operation modes of the system involved in the present invention are different. The operation mode after the system heat storage tank is emptied is the first operation, and the operation mode when the system heat storage tank contains working medium is the re-operation. These two operation modes are introduced below.

[0030] Preparation for the first run: Ensure all solenoid valves and pumps in the pipeline are closed. Then, open the first solenoid valve 3 and the first normal water pump 4. The municipal water in the normal water tank 1 flows through the first solenoid valve 3, the first normal water pump 4, and the water treatment equipment 5, becoming first normal-pressure water and storing it in the first purified water tank 6. After the first purified water tank is filled with purified water, close the first solenoid valve 3 and the first normal water pump 4. Open the second normal water pump 29 and the fifth solenoid valve 30. The first normal-pressure water flows through the third flowmeter 28, the second normal water pump 29, the fifth solenoid valve 30, and the heat exchanger 31 into the second purified water tank 7. Then, close the second normal water pump 29 and the fifth solenoid valve 30. Open the first solenoid valve 3 and the first normal water pump 4 again. Once the first purified water tank 6 is filled with purified water, close the first solenoid valve 3 and the first normal water pump 4. Then, the first to Nth auxiliary heating lines are connected to heat the first to Nth heat storage tanks to the same temperature as the first high-pressure water (the temperature of the first high-pressure water is determined by the required steam volume, the high-pressure water heating tank, etc. At the same time, the temperature of the first high-pressure water can be adjusted within a certain range while meeting the factory production needs and equipment safety, with a certain degree of flexibility in selection, which is not explained in detail here).

[0031] During the initial operation, the first heat storage tank is filled: the first high-pressure pump 10, second solenoid valve 11, third solenoid valve 21, and seventh solenoid valve 34 are turned on, while the AC power supply to the first electric heater 15 is connected. The second normal-pressure water from the second purified water tank 8 flows through the first flowmeter 9, first high-pressure pump 10, second solenoid valve 11, first three-way pipe 13, second flowmeter 14, high-pressure water heating tank 16, third solenoid valve 21, second three-way pipe 24, seventh solenoid valve 34, and fourth flowmeter 35, entering the first heat storage tank 50 for storage. The second normal-pressure water is pressurized by the first high-pressure pump 10 and heated by the first electric heater 15, becoming the first high-pressure water. During this process, the flow rate from the second flowmeter 14 and the heating power of the first electric heater 15 must be maintained stable.

[0032] First Run Second Heat Storage Tank Filling: When the first heat storage tank 50 reaches its rated capacity, the seventh solenoid valve 34 is immediately closed and the ninth solenoid valve 38 is immediately opened. The second normal-pressure water from the second purified water tank 8 flows through the first flowmeter 9, the first high-pressure pump 10, the second solenoid valve 11, the first tee 13, the second flowmeter 14, the high-pressure water heating tank 16, the third solenoid valve 21, the second tee 24, the third tee 25, the ninth solenoid valve 38, and the sixth flowmeter 39, before entering the second heat storage tank 60 for storage. During this process, the flow rate from the second flowmeter 14 and the heating power of the first electric heater 15 must be maintained stable. When the second heat storage tank reaches its rated capacity, the ninth solenoid valve 38 and the sixth flowmeter 39 are immediately closed.

[0033] …

[0034] Filling the Nth heat storage tank during the first operation: When the charge of the N-1th heat storage tank reaches its rated charge, the solenoid valve connected to the working fluid inlet of the N-1th heat storage tank is immediately closed, and the eleventh solenoid valve 42 connected to the working fluid inlet of the Nth heat storage tank 70 is immediately opened. The second normal-pressure water from the second purified water tank 8 flows through the first flowmeter 9, the first high-pressure pump 10, the second solenoid valve 11, the first tee 13, the second flowmeter 14, the high-pressure water heating tank 16, the third solenoid valve 21, the second tee 24, the third tee 25, the eleventh solenoid valve 42, and the eighth flowmeter 43, and enters the Nth heat storage tank 70 for storage. During this process, the flow rate of the second flowmeter and the heating power of the first electric heater must be maintained stable. Once the Nth heat storage tank 70 is filled, the first high-pressure pump 10, the second solenoid valve 11, the third solenoid valve 21, the eleventh solenoid valve 42, and the first electric heater 15 are immediately closed. Then, the first electromagnetic valve 3 and the first ordinary water pump 4 are opened again, and the first electromagnetic valve 3 and the first ordinary water pump 4 are closed after the first purified water tank is filled with purified water.

[0035] Flash Vaporization During the First Run: When steam is needed, steam is generated sequentially, starting with the first heat storage tank 50. First, the 15th solenoid valve 89, the 18th solenoid valve 97, the pressure reducing valve 99, and the 19th solenoid valve 100 are opened, and the pressure at the pressure reducing valve outlet is set constant. The first high-pressure water in the first heat storage tank 50 flashes due to the drop in pressure within the tank, producing high-pressure steam. The generated water vapor is filtered through the first steam-water separator 55 to produce first high-pressure steam. The first high-pressure steam passes through the 15th solenoid valve 89, the 12th flowmeter 90, the 6th tee 95, the 7th tee 96, the 18th solenoid valve 97, the 15th flowmeter 98, the pressure reducing valve 99, and the 19th solenoid valve 100, and enters the steam heating tank 102. The steam heating tank compensates for the first high-pressure steam by heating it to produce second high-pressure steam. The second high-pressure steam passes through the 16th flowmeter 106 and is ultimately supplied to the user. During the flash vaporization process, if the reading on the 12th flowmeter 90 approaches zero, the flash vaporization of the first heat storage tank 50 is considered complete. Immediately thereafter, the fifteenth solenoid valve 89 is closed, and flash evaporation of the second heat storage tank 60 begins. The sixteenth solenoid valve 91 is opened, and the water vapor generated in the second heat storage tank is filtered through the second steam-water separator 65 to produce first-pressure steam. This first-pressure steam is reduced in pressure by the pressure reducing valve 99 and enters the steam heating tank 102 for compensatory heating, ultimately producing qualified second-pressure steam. Flash evaporation of the next heat storage tank is initiated sequentially according to the above method: when the flow meter reading at the steam outlet of a heat storage tank approaches zero, the solenoid valve at the steam outlet of that heat storage tank is closed, and the solenoid valve at the steam outlet of the next heat storage tank is opened. This continues until the flash evaporation of the Nth heat storage tank 70 is completed, after which the seventeenth, eighteenth, and nineteenth solenoid valves 93, 97, and 100 are immediately closed.

[0036] Then, the heating of the second high-pressure water in the first heat storage tank is performed: first, ensure that all valves are in the closed state, then open the fifth solenoid valve 30 and the second ordinary water pump 29, and then, after confirming that the first normal-temperature water in the first purified water tank 6 enters the heat exchanger 31, open the eighth solenoid valve 37, the sixth solenoid valve 32, the thirteenth solenoid valve 46, and the third high-pressure pump 33. The first atmospheric water and the residual water from the first flash evaporation flow simultaneously through their respective pipelines and exchange heat in the heat exchanger. The first atmospheric water in the first purified water tank 6 passes through the third flowmeter 28, the second normal water pump 29, the fifth solenoid valve 30, and the heat exchanger 31, where it absorbs heat and becomes second atmospheric water. This water then enters the second purified water tank 8 for storage. The second high-pressure water in the first heat storage tank passes through the eighth solenoid valve 37, the fifth flowmeter 36, the fourth three-way pipe 26, the fifth three-way pipe 27, the heat exchanger 31, the sixth solenoid valve 32, the third high-pressure pump 33, the thirteenth solenoid valve 46, and the tenth flowmeter 47. It is cooled in the heat exchanger and becomes third high-pressure water, ultimately entering the (N+1) heat storage tank 80. After the first heat storage tank is emptied, all solenoid valves and water pumps are immediately closed, and the first auxiliary heat line 51 is connected. When the temperature of the first heat storage tank reaches the temperature of the first high-pressure water, the first auxiliary heat line is closed. Then, the fourteenth solenoid valve 49, the second high-pressure pump 23, the fourth solenoid valve 22, the third solenoid valve 21, and the seventh solenoid valve 34 are opened, and the first electric heater 15 is simultaneously connected. The third high-pressure water in the (N+1) heat storage tank 80 passes through the fourteenth solenoid valve 49, the eleventh flowmeter 48, the second high-pressure pump 23, the fourth solenoid valve 22, the first three-way pipe 13, the second flowmeter 14, and the high-pressure water heating tank 16, where it becomes the first high-pressure water. The water then passes through the third solenoid valve 21, the second three-way pipe 24, the seventh solenoid valve 34, and the fourth flowmeter 35, ultimately entering the first heat storage tank 50. Once the (N+1) heat storage tank 80 is empty, the first electric heater 15 is immediately disconnected, and all solenoid valves and water pumps are closed.

[0037] Next, the heating of the second high-pressure water in the second heat storage tank begins: First, ensure all valves are closed. Then, open the fifth solenoid valve 30 and the second normal water pump 29. After confirming that the first normal-temperature water in the first purified water tank 6 has entered the heat exchanger 31, open the tenth solenoid valve 41, the sixth solenoid valve 32, the thirteenth solenoid valve 46, and the third high-pressure pump 33. The first normal-pressure water in the first purified water tank 6 passes through the third flowmeter 28, the second normal water pump 29, the fifth solenoid valve 30, and the heat exchanger 31, and enters the second purified water tank 8, where it absorbs heat and becomes the second normal-pressure water. The second high-pressure water in the second heat storage tank 60 passes through the tenth solenoid valve 41, the seventh flowmeter 40, the fourth three-way pipe 26, the fifth three-way pipe 27, the heat exchanger 31, the sixth solenoid valve 32, the third high-pressure pump 33, the thirteenth solenoid valve 46, and the tenth flowmeter 47, and enters the (N+1)th heat storage tank 80, where it is cooled and becomes the third high-pressure water. After the second heat storage tank is emptied, all solenoid valves and water pumps are immediately closed, and the second auxiliary heating line 61 is connected. When the temperature of the second heat storage tank reaches the temperature of the first high-pressure water, the second auxiliary heating line is closed. The fourteenth solenoid valve 49, the second high-pressure pump 23, the fourth solenoid valve 22, the third solenoid valve 21, and the ninth solenoid valve 38 are then opened, and the first electric heater 15 is connected. The third high-pressure water in the (N+1) heat storage tank 80 passes through the fourteenth solenoid valve 49, the eleventh flowmeter 48, the second high-pressure pump 23, the fourth solenoid valve 22, the first tee pipe 13, the second flowmeter 14, and the high-pressure water heating tank 16, where it becomes the first high-pressure water. The water then passes through the third solenoid valve 21, the second tee pipe 24, the third tee pipe 25, the ninth solenoid valve 38, and the sixth flowmeter 39 before entering the second heat storage tank 60. After the (N+1) heat storage tank is emptied, the first electric heater is immediately disconnected, and all solenoid valves and water pumps are closed.

[0038] …

[0039] Next, the heating of the second high-pressure water in the Nth heat storage tank begins: the fifth solenoid valve 30 and the second normal water pump 29 are opened. After confirming that the first normal-temperature water in the first purified water tank 6 has entered the heat exchanger 31, the twelfth solenoid valve 45, the sixth solenoid valve 32, the thirteenth solenoid valve 46, and the third high-pressure pump 33 are opened. The first normal-pressure water in the first purified water tank 6 passes through the third flowmeter 28, the second normal water pump 29, the fifth solenoid valve 30, and the heat exchanger 31, and enters the second purified water tank 8, where it absorbs heat and becomes the second normal-pressure water. The second high-pressure water in the Nth heat storage tank 70 passes through the twelfth solenoid valve 45, the ninth flowmeter 44, the fifth three-way pipe 27, the heat exchanger 31, the sixth solenoid valve 32, the third high-pressure pump 33, the thirteenth solenoid valve 46, and the tenth flowmeter 47, and enters the (N+1)th heat storage tank 80, where it is cooled and becomes the third high-pressure water. After the Nth heat storage tank is emptied, all solenoid valves and water pumps are immediately closed, and the Nth auxiliary heat line 71 is connected. When the temperature of the Nth heat storage tank 70 reaches the temperature of the first high-pressure water, the Nth auxiliary heat line is closed. The fourteenth solenoid valve 49, the second high-pressure pump 23, the fourth solenoid valve 22, the third solenoid valve 21, and the eleventh solenoid valve 42 are then opened, and the first electric heater 15 is connected. The third high-pressure water in the N+1th heat storage tank 80 passes through the fourteenth solenoid valve 49, the eleventh flowmeter 48, the second high-pressure pump 23, the fourth solenoid valve 22, the first tee pipe 13, the second flowmeter 14, and the high-pressure water heating tank 16, where it becomes the first high-pressure water. The water then passes through the third solenoid valve 21, the second tee pipe 24, the third tee pipe 25, the eleventh solenoid valve 42, and the eighth flowmeter 43 before entering the Nth heat storage tank 70. After the N+1th heat storage tank is emptied, the first electric heater is immediately disconnected, and all solenoid valves and water pumps are closed.

[0040] To refill the heat storage tank: Activate the first high-pressure pump 10, the second solenoid valve 11, the third solenoid valve 21, and the seventh solenoid valve 34, while simultaneously connecting the AC power supply to the first electric heater 15. The second normal-pressure water from the second purified water tank 8 flows through the first flowmeter 9, the first high-pressure pump 10, the second solenoid valve 11, the first three-way pipe 13, the second flowmeter 14, the high-pressure water heating tank 16, the third solenoid valve 21, the second three-way pipe 24, the seventh solenoid valve 34, and the fourth flowmeter 35 into the first heat storage tank 50. The second normal-pressure water is pressurized by the first high-pressure pump 10 and heated by the high-pressure water heating tank 16 to become the first high-pressure water. Once the first heat storage tank 50 is filled to its rated capacity, the seventh solenoid valve is immediately closed and the ninth solenoid valve is opened to begin filling the second heat storage tank. The solenoid valve at the first high-pressure water inlet of the current heat storage tank is closed, and the solenoid valve at the inlet of the next heat storage tank is opened, until the Nth heat storage tank is completely filled, at which point the eleventh solenoid valve is immediately closed. During this process, the flow rate of the second flow meter and the heating power of the first electric heating wire must be kept stable. Then, the first electromagnetic valve and the first ordinary water pump are opened, and the first electromagnetic valve and the first ordinary water pump are closed after the first purified water tank is filled with purified water.

[0041] Flash evaporation: When steam is needed, steam is generated sequentially, starting with the first heat storage tank 50. First, the 15th solenoid valve 89, the 18th solenoid valve 97, the pressure reducing valve 99, and the 19th solenoid valve 100 are opened, and the pressure at the pressure reducing valve outlet is set constant. The first high-pressure water in the first heat storage tank flashes due to the drop in pressure within the tank, producing high-pressure steam. The generated water vapor is filtered through the first steam-water separator 55 to produce first high-pressure steam. The first high-pressure steam passes through the 15th solenoid valve 89, the 12th flowmeter 90, the 6th tee 95, the 7th tee 96, the 18th solenoid valve 97, the 15th flowmeter 98, the pressure reducing valve 99, and the 19th solenoid valve 100, and enters the steam heating tank 102. The steam heating tank 102 compensates for the first high-pressure steam and produces second high-pressure steam. The second high-pressure steam passes through the 16th flowmeter 106 and is ultimately supplied to the user. During the flash evaporation process, if the reading on the 12th flowmeter 90 approaches zero, the flash evaporation of the first heat storage tank is considered complete. Immediately afterward, the fifteenth solenoid valve is closed, and flash evaporation of the second heat storage tank begins. The sixteenth solenoid valve 106 is opened, and the water vapor generated in the second heat storage tank is filtered through the second steam-water separator to produce first-pressure steam. The first-pressure steam is reduced in pressure by the pressure reducing valve and enters the steam heating tank for compensatory heating, ultimately producing qualified second-pressure steam. Flash evaporation of the next heat storage tank is initiated sequentially according to the above method: when the flow meter reading at the steam outlet of a heat storage tank approaches zero, the solenoid valve at the steam outlet of that heat storage tank is closed, and the solenoid valve at the steam outlet of the next heat storage tank is opened until the flash evaporation of the Nth heat storage tank is completed. Afterward, the seventeenth solenoid valve 93, the eighteenth solenoid valve 97, and the nineteenth solenoid valve 100 are immediately closed.

[0042] The above is the specific operation process of the system operation. The present invention provides operating parameters for three operating conditions, as shown in the table below. The specific operation process is consistent with the above operation process:

[0043]

[0044] The present invention uses high-pressure purified water as the energy storage medium, converting electrical energy into thermal energy and storing it during the off-peak period of electricity consumption, and producing industrial steam when needed. It is applied to the deep peak regulation of the power grid and can reduce the peak regulation pressure of the power grid. Under applicable working conditions, the heat storage temperature can reach 250℃-350℃, the pressure can reach 4MPa-16MPa, and the mass heat storage density can reach up to 1300kJ. . kg -1 , the volumetric heat storage density can reach 0.78 GJ . m -3 , which is comparable to the energy density of chemical heat storage and 3-5 times that of sensible heat or other phase change heat storage, and can store a large amount of heat energy in a smaller volume.

Claims

1. An ultra-high-pressure heat storage system for generating industrial steam. The heat storage system consists of six parts: a water treatment module (A), a high-pressure water heating module (B), a remote signal acquisition and processing module (C), a heat storage module (D), a steam heating module (E), and a pipeline connection and control module (F). The system is characterized by: The heating of the heat storage medium is completed in the high-pressure water heating module, and the storage and heat release of the heat storage medium are completed in the heat storage module; The pipeline connection and control module is the process control module of the entire heat storage system, which controls the flow of the heat storage medium in the entire system, including steel pipes, first to second ordinary water pumps, first to third high-pressure pumps, first to seventh three-way pipes, first to nineteenth solenoid valves, and first to sixteenth flow meters; The water treatment module is responsible for purifying and storing system water, and includes a common water tank, water treatment equipment, a first purified water tank, a second purified water tank, a first insulation layer, and a heat exchanger; The high-pressure water heating module is responsible for converting electrical energy into thermal energy and storing it in high-pressure purified water, and includes an AC power supply, a first electric heating wire, a high-pressure water heating tank, a second insulation layer, a first local pressure gauge, and a first local thermometer; The heat storage module includes N+1 heat storage tanks and their supporting equipment; the N+1 heat storage tanks are respectively a first heat storage tank, a second heat storage tank, ..., an Nth heat storage tank, and an N+1th heat storage tank; the first to Nth heat storage tanks are both storage tools for storing high-pressure heat water and can also generate high-pressure steam through flash evaporation; the N+1th heat storage tank is different from the first N heat storage tanks. It is a transfer tank before the high-pressure water is heated, which can effectively prevent production accidents caused by thermal stress due to uneven temperature during the heating process of the first to Nth heat storage tanks; the supporting equipment of the first to Nth heat storage tanks includes an on-site pressure gauge, an on-site thermometer, an on-site liquid level gauge, a remote pressure gauge, a remote thermometer, a remote liquid level gauge, an insulation layer, an auxiliary heating line, and a steam-water separator; The steam heating module is responsible for compensating heating of the first high-pressure steam, and includes a steam heating tank, an N+4 insulation layer, a second electric heating wire, an N+3 local thermometer, an N+3 local pressure gauge, and a pressure reducing valve; The remote signal acquisition and processing module can remotely monitor and record the operating conditions of the system, and includes a data transmission line, a data collector, and a computer. The data collector is connected to the remote pressure gauges, remote thermometers, and remote liquid level gauges in the heat storage module and the steam generation module via the data transmission line. The remote data is collected by the data collector and entered into the computer, which processes and corrects the data signals of the remote pressure gauges, remote thermometers, and remote liquid level gauges. During the heat storage stage, the system uses electric heating to heat high-pressure water and stores it in a heat storage tank; during the heat release stage, the required industrial steam is obtained through flash evaporation in the heat storage tank and combined with electric compensation heating.

2. The ultra-high pressure heat storage system for generating industrial steam according to claim 1, characterized in that: In the pipeline connection and control module, the steel pipe is the connecting element of the entire system; the heat exchanger is a key component to ensure the normal operation of the third high-pressure pump. The cold water inlet of the heat exchanger is connected to the fifth solenoid valve, the cold water outlet of the heat exchanger is connected to the second purified water tank, the hot water inlet of the heat exchanger is connected to the fifth tee, and the hot water outlet of the heat exchanger is connected to the sixth solenoid valve. The sixth solenoid valve is connected to the third high-pressure pump. The ordinary water pump operates at normal temperature and pressure and only provides power for the flow of the working fluid without pressurizing the working fluid. The first ordinary water pump is located between the ordinary water tank and the water treatment equipment, and the second ordinary water pump is located between the first purified water tank and the second purified water tank. The high-pressure pumps are all high-pressure boiler feed water pumps. The first high-pressure pump is located between the first flowmeter and the second solenoid valve. It operates at room temperature and directly pressurizes the working fluid to the pressure required by the first high-pressure water. The second high-pressure pump is located between the fourth solenoid valve and the eleventh flowmeter and pressurizes the third high-pressure water to the pressure required by the first high-pressure water. The third high-pressure pump is located between the sixth solenoid valve and the thirteenth solenoid valve and does not pressurize the working fluid.

3. The ultra-high pressure heat storage system for generating industrial steam according to claim 1, characterized in that: The water treatment module has an ordinary water tank that stores municipal water, and the ordinary water tank is connected to the water treatment equipment through a first solenoid valve and a first ordinary water pump; the water treatment equipment is connected to a first purified water tank, and the volume of the first purified water tank needs to ensure the water required for a single operation of the system; the first purified water tank is connected in sequence to a third flow meter, a second ordinary water pump, a fifth solenoid valve, and a heat exchanger, and finally to a second purified water tank, and the second purified water tank is wrapped with a first insulation layer, and the volume of the second purified water tank needs to ensure the water required for a single operation of the system.

4. The ultra-high pressure heat storage system for generating industrial steam according to claim 1, characterized in that: In the high-pressure water heating module, the high-pressure water heating tank is wrapped with a second insulation layer, and a first electric heating wire is evenly distributed inside the tank; the first electric heating wire is connected to an AC power supply, and a first on-site thermometer and a first on-site pressure gauge are provided near the fluid outlet of the high-pressure water heating tank, which are used to observe the state of high-pressure water in the high-pressure water heating tank on-site; the working fluid outlet of the high-pressure water heating tank passes through the first to Nth heat storage tanks in the pipeline heat storage module; the working fluid inlet of the high-pressure water heating tank is connected to the second flow meter and the first three-way pipe in sequence through a steel pipe; one side of the first three-way pipe is connected to the second solenoid valve, the first high-pressure pump, the first flow meter, and finally connected to the second purified water tank of the water treatment module, and the other side is connected to the fourth solenoid valve, the second high-pressure pump, the eleventh flow meter, the fifteenth solenoid valve, and the N+1th heat storage tank in sequence through a steel pipe.

5. The ultra-high pressure heat storage system for generating industrial steam according to claim 4, characterized in that: The AC power supply adopts 10000V industrial electricity, and the electric heating wire can be made of iron-chromium-aluminum alloy or nickel-chromium alloy with good high-temperature strength.

6. The ultra-high pressure heat storage system for generating industrial steam according to claim 1, characterized in that: The structures of the first to Nth heat storage tanks are the same: the upper part of the heat storage tank is a first high-pressure steam outlet, which is connected to the solenoid valve, flow meter, and tee pipe in sequence through a steel pipe, and finally connected to the steam heating tank; the lower part is a second high-pressure water outlet, which is connected to the solenoid valve, flow meter, and tee pipe in sequence, and then through a heat exchanger, a high-pressure pump, and a solenoid valve, and finally connected to the N+1th heat storage tank; the left side is a first high-pressure water inlet, which is connected to the flow meter, solenoid valve, and tee pipe in sequence, and then connected to the high-pressure water heating tank through the solenoid valve; a steam-water separator is installed above the interior of the heat storage tank, which can filter small water droplets or water mist in the flash steam, improve the quality of the flash steam, separate the steam, and send it to the steam heating tank; In order to facilitate the recycling of high-pressure water, an N+1 heat storage tank is set. The supporting equipment of the N+1 heat storage tank includes the N+2 local pressure gauge, the N+2 local thermometer, the N+1 local liquid level gauge, the N+1 remote pressure gauge, the N+1 remote thermometer, the N+1 remote liquid level gauge, the N+3 insulation layer, and the N+1 auxiliary heating line. The N+1 heat storage tank is not used as a heat storage tank body. The left side is the third high-pressure water inlet, which is connected to the flow meter, the solenoid valve, the high-pressure pump, and the heat exchanger in sequence; the lower part is the third high-pressure water outlet, which is connected to the solenoid valve, the flow meter, the high-pressure pump in sequence, and finally connected to the high-pressure water heating tank. The volume and wall thickness of N+1 heat storage tanks are exactly the same, and auxiliary heating wires are wrapped around them, and the auxiliary heating wires are wrapped with an insulation layer. The local pressure gauge, local thermometer, and local liquid level gauge are used to display the working status of the heat storage tank on site. The remote pressure gauge, remote thermometer, and remote liquid level gauge are connected to the data collector through a data transmission line, and the signal is finally output to the computer. The liquid level gauge needs to compensate for the liquid level according to actual conditions during long-term operation.

7. The ultra-high pressure heat storage system for generating industrial steam according to claim 6, characterized in that: The steam-water separator adopts a two-stage steam-water separation device: the first-stage steam-water separation device adopts a tangential guide vane cyclone separator or a vertical throttle plate steam-water separator to eliminate the kinetic energy of the steam-water mixture and perform preliminary separation of the steam; the second-stage steam-water separation device adopts a corrugated plate separator to separate the fine water droplets carried in the steam.

8. The ultra-high pressure heat storage system for generating industrial steam according to claim 1, characterized in that: In the steam heating module, a second electric heating wire is provided in the steam heating tank, which is wrapped with the N+4th insulation layer on the outside, and an N+3th local thermometer and an N+3th local pressure gauge are provided on the top; the N+3th local pressure gauge and the N+3th local thermometer are used to measure the state of the second high-pressure steam at the outlet of the steam heating tank; the second electric heating wire compensates for the heating of the saturated steam to obtain suitable steam; the pressure reducing valve reduces the pressure of the steam with higher pressure that may exist in the flash evaporation process, and the pressure reducing valve cooperates with the second electric heating wire to ensure that all the steam after the flash evaporation is converted into qualified steam.

9. A method for using the ultra-high pressure heat storage system for generating industrial steam according to any one of claims 1 to 8, characterized in that The following steps are involved: There are differences between the first operation and the re-operation of the system. The operation mode after the system heat storage tank is empty is the first operation, and the operation mode when the system heat storage tank contains working medium is the re-operation. (1) The method of use for the first run is: Preparation for the first operation: Make sure that all the solenoid valves and water pumps in the pipeline are in the closed state, then open the first solenoid valve and the first ordinary water pump. The municipal water in the ordinary water tank passes through the first solenoid valve, the first ordinary water pump, and the water treatment equipment to become the first normal-pressure water and is stored in the first purified water tank; after the first purified water tank is full of purified water, close the first solenoid valve and the first ordinary water pump, open the second ordinary water pump and the fifth solenoid valve, and the first normal-pressure water enters the second purified water tank through the third flow meter, the second ordinary water pump, the fifth solenoid valve, and the heat exchanger; then close the second ordinary water pump and the fifth solenoid valve, open the first solenoid valve and the first ordinary water pump again, and close the first solenoid valve and the first ordinary water pump after the first purified water tank is full of purified water; then connect the first to N auxiliary heating lines to heat the first to N heat storage tanks to the same temperature as the first high-pressure steam; Filling the first heat storage tank during the first operation: Turn on the first high-pressure pump, the second solenoid valve, the third solenoid valve, and the seventh solenoid valve, and simultaneously connect the AC power supply of the first electric heating wire; the second normal-pressure water from the second purified water tank passes through the first flow meter, the first high-pressure pump, the second solenoid valve, the first three-way pipe, the second flow meter, the high-pressure water heating tank, the third solenoid valve, the second three-way pipe, the seventh solenoid valve, and the fourth flow meter, and enters the first heat storage tank for storage. The second normal-pressure water is pressurized by the first high-pressure pump and heated by the first electric heating wire to become the first high-pressure water; the flow rate of the second flow meter must be maintained during this process. and the stability of the heating power of the first electric heating wire; when the filling amount of the first heat storage tank reaches the rated filling amount of the heat storage tank, the seventh solenoid valve is immediately closed and the ninth solenoid valve is immediately opened; the filling process of the second heat storage tank to the Nth heat storage tank during the first operation is the same as the filling process of the first heat storage tank; after the Nth heat storage tank is filled, the first high-pressure pump, the second solenoid valve, the third solenoid valve, the eleventh solenoid valve, and the first electric heating wire are immediately closed; then the first solenoid valve and the first ordinary water pump are opened again, and the first solenoid valve and the first ordinary water pump are closed after the first purified water tank is filled with purified water; Flash evaporation during the first operation: When steam is needed, steam is generated in sequence starting from the first heat storage tank. First, the fifteenth solenoid valve, the eighteenth solenoid valve, the pressure reducing valve, and the nineteenth solenoid valve are opened, and the pressure reducing valve outlet pressure is set to be constant. The first high-pressure water in the first heat storage tank flashes and generates high-pressure steam due to the pressure drop in the tank. The water vapor generated in the tank is filtered through the first steam-water separator to obtain the first high-pressure steam. The first high-pressure steam passes through the fifteenth solenoid valve, the twelfth flow meter, the sixth three-way pipe, the seventh three-way pipe, the eighteenth solenoid valve, the fifteenth flow meter, the pressure reducing valve, and the nineteenth solenoid valve and enters the steam heating tank. The steam heating tank is The first high-pressure steam is subjected to compensatory heating to obtain the second high-pressure steam; the second high-pressure steam is finally supplied to the user through the sixteenth flow meter; during the flash evaporation process, if the reading of the twelfth flow meter is close to zero, the flash evaporation of the first heat storage tank is considered to be completed; then the fifteenth solenoid valve is immediately closed, and the flash evaporation of the next heat storage tank is sequentially started according to the above method: when the reading of the flow meter at the steam outlet of the heat storage tank is close to zero, the solenoid valve at the steam outlet of the heat storage tank is closed, and the solenoid valve at the steam outlet of the next heat storage tank is opened until the flash evaporation of the Nth heat storage tank is completed, after which the seventeenth solenoid valve, the eighteenth solenoid valve, and the nineteenth solenoid valve are immediately closed; (2) The method of re-running is: Then, heat the second high-pressure water in the first heat storage tank: first, ensure that all valves are in the closed state, then open the fifth solenoid valve and the second ordinary water pump, and then after confirming that the first normal-temperature water in the first purified water tank enters the heat exchanger, open the eighth solenoid valve, the sixth solenoid valve, the thirteenth solenoid valve, and the third high-pressure pump; the first normal-pressure water and the first flash residual water flow in their respective pipelines at the same time, and heat exchange occurs in the heat exchanger: the first normal-pressure water in the first purified water tank passes through the third flow meter, the second ordinary water pump, the fifth solenoid valve, and the heat exchanger, absorbs heat in the heat exchanger to become the second normal-pressure water, and enters the second purified water tank to be stored; the second high-pressure water in the first heat storage tank passes through the eighth solenoid valve, the fifth flow meter, the fourth three-way pipe, the fifth three-way pipe, the heat exchanger, the sixth solenoid valve, the third high-pressure pump, the thirteenth solenoid valve, and the tenth flow meter, and in the heat exchanger The third high-pressure water in the heat storage tank (N+1) is cooled and becomes the third high-pressure water, which eventually enters the N+1 heat storage tank; after the first heat storage tank is emptied, all solenoid valves and water pumps are immediately closed, and then the first auxiliary heat line is connected. When the temperature of the first heat storage tank reaches the temperature of the first high-pressure water, the first auxiliary heat line is closed; then the fourteenth solenoid valve, the second high-pressure pump, the fourth solenoid valve, the third solenoid valve, and the seventh solenoid valve are opened, and the first electric heating wire is connected at the same time. The third high-pressure water in the N+1 heat storage tank passes through the fourteenth solenoid valve, the eleventh flow meter, the second high-pressure pump, the fourth solenoid valve, the first three-way pipe, the second flow meter, and the high-pressure water heating tank, and becomes the first high-pressure water in the high-pressure water heating tank, and then passes through the third solenoid valve, the second three-way pipe, the seventh solenoid valve, and the fourth flow meter, and finally enters the first heat storage tank; after the N+1 heat storage tank is emptied, the first electric heating wire is immediately disconnected, and all solenoid valves and water pumps are closed; The method for heating the second high-pressure water in the second heat storage tank to the Nth heat storage tank is carried out in accordance with the method for heating the second high-pressure water in the first heat storage tank. Refilling the heat storage tank: start the first high-pressure pump, the second solenoid valve, the third solenoid valve, and the seventh solenoid valve, and simultaneously connect the AC power supply to the first electric heating wire. The second normal-pressure water from the second purified water tank enters the first heat storage tank through the first flowmeter, the first high-pressure pump, the second solenoid valve, the first tee, the second flowmeter, the high-pressure water heating tank, the third solenoid valve, the second tee, the seventh solenoid valve, and the fourth flowmeter. The second normal-pressure water is pressurized by the first high-pressure pump and heated by the high-pressure water heating tank to become the first high-pressure water. After the first heat storage tank is filled to the rated capacity, the seventh solenoid valve is immediately closed and the ninth solenoid valve is opened to fill the second heat storage tank. The solenoid valve at the first high-pressure water inlet of the current heat storage tank is closed in sequence, and the solenoid valve at the inlet of the next heat storage tank is opened until the Nth heat storage tank is filled and the eleventh solenoid valve is immediately closed. During this process, the flow rate of the second flowmeter and the heating power of the first electric heating wire must be maintained stable. Then, the first solenoid valve and the first normal water pump are opened. After the first purified water tank is filled with purified water, the first solenoid valve and the first normal water pump are closed. Flash evaporation in the next operation: when steam is needed, steam is generated in sequence starting from the first heat storage tank. First, the fifteenth solenoid valve, the eighteenth solenoid valve, the pressure reducing valve, and the nineteenth solenoid valve are opened, and the pressure reducing valve outlet pressure is set to be constant; the first high-pressure water in the first heat storage tank flashes to generate high-pressure steam due to the pressure drop in the tank, and the water vapor generated in the tank is filtered through the first steam-water separator to obtain the first high-pressure steam; the first high-pressure steam passes through the fifteenth solenoid valve, the twelfth flow meter, the sixth three-way pipe, the seventh three-way pipe, the eighteenth solenoid valve, the fifteenth flow meter, the pressure reducing valve, and the nineteenth solenoid valve and enters the steam heating tank; the steam heating tank compensates the first high-pressure steam to obtain the second high-pressure steam; the second high-pressure steam passes through the sixteenth flow meter and is finally supplied to the user; the flash evaporation process During the process, if the reading of the twelfth flow meter is close to zero, it is considered that the flash evaporation of the first heat storage tank is completed; then the fifteenth solenoid valve is immediately closed, and the flash evaporation of the second heat storage tank is started; the sixteenth solenoid valve is opened, and the water vapor generated in the second heat storage tank is filtered through the second steam-water separator to obtain first high-pressure steam. The first high-pressure steam is reduced in pressure by the pressure reducing valve and enters the steam heating tank for compensatory heating, and finally obtains qualified second high-pressure steam; the flash evaporation of the next heat storage tank is started in sequence according to the above method: when the reading of the flow meter at the steam outlet of the heat storage tank is close to zero, the solenoid valve at the steam outlet of the heat storage tank is closed, and the solenoid valve at the steam outlet of the next heat storage tank is opened, until the flash evaporation of the Nth heat storage tank is completed, and then the seventeenth solenoid valve, the eighteenth solenoid valve, and the nineteenth solenoid valve are immediately closed.

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