A high pressure thermal storage system for producing industrial steam and methods of use thereof

Abstract

The application discloses a high-pressure heat storage system for generating industrial steam and a use method thereof, and the system is divided into six parts, namely, a water treatment module, a pipeline connection and control module, a heat source module, a heat storage module, a remote signal acquisition and processing module and a steam heating module. Circulating water is used as an energy storage medium, water heated by a high-temperature waste heat source (> 300 DEG C) becomes high-temperature steam, enters a multi-stage parallel heat storage tank, stores the heat energy of the high-temperature waste heat source, and industrial steam is generated by controlling a throttle valve; or superheated steam of a power plant is stored in high-pressure water, and when needed, the superheated steam is returned to a deaerator by pressure reduction through throttling, so that the heat and electricity are decoupled. By designing a special steam heat release structure, the steam is uniformly dispersed in the high-pressure water body, and the heat exchange is strengthened by the disturbance generated by the structure, so that the heat storage power is increased by more than one order of magnitude. The application can efficiently and highly utilize industrial waste heat to produce steam and realize high-density storage, and can also be applied to a heat and power plant to realize heat supply and electricity generation decoupling.

Description

Technical Field

[0001] This invention belongs to the field of thermal energy storage technology, specifically relating to a high-pressure thermal energy storage system that uses water as the thermal energy storage medium to generate industrial steam and its usage method. Background Technology

[0002] Thermal energy storage technology is an important technology for improving energy efficiency and protecting the environment. It can be used to solve the mismatch between heat supply and demand, and has broad application prospects in areas such as solar energy utilization, peak shaving and valley filling of electricity, waste heat and residual heat recovery and utilization, and energy conservation in industrial and civil buildings and air conditioning. It is a research hotspot worldwide. The article "Advances in High-Temperature Steel Slag Treatment and Waste Heat Recovery Technology" points out that steel slag is a typical solid waste from steel enterprises, with an annual output exceeding 400 million tons and containing more than 7.5 × 10⁻⁶ tons of waste heat resources. 17 J, if not utilized, will largely be lost to the environment as heat, indicating a huge potential for waste heat recovery. Furthermore, the recovery and treatment of waste heat from steel slag also has significant energy-saving and carbon-reduction value. Besides steel slag, the slag produced during power generation in thermal power plants also contains a large amount of sensible heat. Currently, the utilization and recovery rate of high-temperature waste heat is low, leading to a significant waste of heat resources. In addition, the large peak load of power plants is also a problem that urgently needs to be addressed. Under the national "dual-carbon" energy strategy, the proportion of new energy sources is gradually increasing, and thermal power plants will assume the role of peak shaving and frequency regulation. Steam extraction and thermal storage is the most economical energy storage and regulation scheme. Compared with the existing molten salt thermal storage peak shaving scheme, water, as the energy storage medium, has advantages such as lower price, no solidification risk, simpler system operation, higher energy density, and lower initial investment, making it suitable for large-scale deployment in the future and a crucial supporting technology for future energy storage peak shaving. At the same time, by extracting steam and storing heat, steam can be supplied directly to the outside without returning to the heat system, effectively improving the unit's top load capacity and solving the problem of insufficient peak capacity of the unit when supplying steam to the outside, thus achieving 100% peak capacity of the unit.

[0003] To achieve the above objectives, the first step is to solve the problem of efficient heat exchange between steam and water under large temperature differences (>250℃). Otherwise, heat transfer will deteriorate, affecting not only the thermal storage capacity but also causing significant vibrations in the storage tank due to the drastic reduction in gas-liquid phase change volume, thus impacting the safe operation and lifespan of the storage components. Chinese Patent CN 115060091 A discloses a noise-reducing direct heating steam jet device and method, employing four 90° elbow nozzles to form a large-scale vortex. While this method can improve thermal storage capacity to some extent, the vortex formation can easily erode monitoring and safety components and cause vibrations or tremors in the storage tank. For high-pressure tanks, this can affect their sealing performance, reducing their pressure-bearing capacity and potentially leading to safety accidents. Therefore, achieving efficient and safe heat exchange between steam and high-pressure water under large temperature differences and high pressure conditions is a pressing issue for high-pressure steam thermal storage and peak-shaving systems. Summary of the Invention

[0004] To overcome the above technical problems, the present invention aims to provide a heat storage system and method for generating industrial steam using water as a circulating medium. The present invention provides two types of heat storage sources: one is a high-temperature waste heat recovery type, in which purified water is pumped through a high-pressure water pump into a partition wall heat exchanger of a waste heat recovery module. After being heated by high-temperature waste heat, the water is converted into a high-temperature steam medium, and the generated steam enters a multi-stage parallel heat storage tank to store the heat; the other is a power plant medium-pressure cylinder extraction heat storage type, in which superheated steam is stored in high-pressure water in the heat storage tank. When releasing heat, the pressure is reduced by throttling to generate steam, which then enters a steam heating tank to become industrial-grade steam that can be used as plant steam.

[0005] The concept of this invention is as follows: 1) For a waste heat steam high-pressure water energy storage system, heat is first transferred to high-pressure subcooled water through a surface heat exchanger. After heat exchange, the water is nearly saturated (a subcooling of 2℃-5℃ can be used to prevent vaporization due to pressure loss in the pipeline). Then, the high-pressure subcooled water is stored in a heat storage tank. Since industrial waste heat is intermittent, this system can store heat when waste heat is available, and the storage time can reach more than 10 hours, which is a typical long-term heat storage technology. When steam is needed, steam can be provided through high-pressure water flash evaporation. Heat storage and steam can be carried out simultaneously or separately. The heat storage tank can be loaded onto a vehicle as needed to achieve off-site steam supply and increase flexibility. 2) For a steam extraction peak-shaving energy storage system, a medium-pressure cylinder is designed to extract steam to heat the subcooled water, thereby increasing the temperature and pressure of the subcooled water and storing the steam energy in the high-pressure water. Since peak shaving requires a certain power density for heat storage, it is desirable to increase the heat release power to quickly and safely release the steam heat into the high-pressure water for storage. This invention designs a structure and device for the phase change heat release of steam into high-pressure water under high heat load and large temperature difference conditions. Utilizing a specific structure and appropriate steam flow rate, it enables the rapid and safe release of heat from high-temperature, high-pressure steam into low-temperature water. This heat release device can also be applied to waste heat high-pressure water energy storage systems. The basic idea of ​​both types of heat storage systems is to store the latent heat of steam with a large enthalpy value in the form of sensible heat. The higher the storage pressure and temperature, the higher the mass and volumetric energy density. When steam is needed, the high-pressure water is released as saturated or superheated steam with certain parameters through flash evaporation, for use by steam users or returned to the thermal system to reduce the consumption of coal or other fuels, thereby improving the system's economy.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A high-pressure thermal storage system for generating industrial steam comprises six parts: a water treatment module, a pipeline connection and control module, a heat source module, a thermal storage module, a remote signal acquisition and processing module, and a steam heating module. The heating and storage of the thermal storage medium and the heating of the steam are respectively completed in the heat source module, the thermal storage module, and the steam heating module.

[0007] The water treatment module includes a general water tank, water treatment equipment, and a purified water tank. The general water tank contains municipal water and is connected to the water treatment equipment via a first solenoid valve and a general water pump. In the water treatment stage, the water treatment equipment purifies the water to meet boiler operating requirements before transferring it to the purified water tank for later use. Once the purified water tank is replenished, the first solenoid valve and the general water pump are shut off. The water treatment equipment must meet the purification standards of the "Water and Steam Standards for Thermal Power Plants" to maintain the safe and stable operation of the equipment.

[0008] The pipeline connection and control module is the process control module for the entire thermal storage system, including steel pipes, a regular water pump, a first high-pressure pump, first to Nth solenoid valves, first to Nth flow meters, and first to Nth tee pipes (the value of N is set as needed according to the thermal storage capacity, theoretically enabling GW-level energy storage). This module controls the flow, pressurization, and monitoring of the working fluid in the entire thermal storage system. The steel pipes are the connecting elements of the entire system (except for remote data acquisition). The regular water pump is located between the regular water tank and the water treatment equipment. The first high-pressure pump is a high-pressure boiler feed pump, located between the water treatment module and the high-temperature waste heat heating module, operating at ambient temperature, with a working pressure difference of at least 16 MPa before and after the pump. The solenoid valves, flow meters, tee pipes, and corresponding pipelines are required to withstand pressures of at least 16 MPa. The flow meters can be divided into water mass flow meters and steam mass flow meters.

[0009] The thermal storage module includes N thermal storage tanks, steam heat release pipe assemblies within the tanks, and their supporting equipment. The N thermal storage tanks include a first thermal storage tank, a second thermal storage tank, a third thermal storage tank, a fourth thermal storage tank, ..., an Nth thermal storage tank (the number of tanks is set according to the thermal storage capacity). Each thermal storage tank is equipped with a local pressure gauge, a local thermometer, a local level gauge, and a remote pressure gauge, a remote thermometer, and a remote level gauge. The outer layer of each thermal storage tank should be covered with an insulation layer. Each thermal storage tank has the same structure. A steam heat release pipe assembly is located at the bottom of the tank. The working fluid, water, is heated to high-temperature steam in the heat source module. The high-temperature steam is transported via pipeline to the steam heat release pipe assembly connected to the bottom of the tank. The specially designed jet structure of the pipe assembly forms high-pressure steam that mixes with the cold water in the tank. Meanwhile, the bottom of the heat storage tank is connected to a water supply pipeline and a steam pipeline. The water supply pipeline and the steam pipeline are equipped with solenoid valves and flow meters, respectively. The water supply pipeline and the steam pipeline are connected to the main pipeline through a tee pipe. The main pipeline is connected to the purified water tank and the heat source module, respectively. The top of the heat storage tank is connected to a steam venting pipeline. The steam venting pipeline is equipped with a solenoid valve, a flow meter and a throttle valve. The steam venting pipeline is connected to the main pipeline through a tee pipe. The main pipeline is connected to the steam heating module. The steam heat release tube assembly is placed at the bottom of the heat storage tank and connected to the steam pipeline at the bottom of the heat storage tank. The heat release tube assembly consists of five circumferentially evenly arranged steam injection pipes. Each steam injection pipe has holes evenly provided on its wall along the tangent direction of the circumferential outer circle of the tube assembly. The direction of the holes on the five pipes is consistent with the tangent direction of the outer circle of the five pipes. The diameter of the holes is 4~12 mm.

[0010] The steam heating module includes a steam heating tank, an insulation layer, an electric heating wire, a local thermometer, and a local pressure gauge. The steam heating tank contains the electric heating wire and is wrapped with an insulation layer. A local thermometer and a local pressure gauge are located on top of the tank. The left side of the steam heating tank is connected to an Nth tee pipe via a steel pipe, and the upper part is connected to a flow meter via a steel pipe.

[0011] 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 level gauges in the thermal storage module and steam generation module. Remote data is collected by the data collector and sent to the computer, which processes and corrects the data signals from the remote pressure gauges, remote thermometers, and remote level gauges.

[0012] The heat source module includes any one of the following two: One type is the high-temperature waste heat recovery type. Purified water is pumped through a high-pressure pump into a partitioned heat exchanger in the waste heat recovery module. The water, heated by high-temperature waste heat, is converted into high-temperature steam. The generated steam enters a multi-stage parallel heat storage tank to store the heat. The high-temperature waste heat heating module includes a partitioned heat exchanger containing a high-temperature waste heat source and steam pipes, and is externally wrapped with an insulation layer. The fluid inlet of the partitioned heat exchanger is connected via a T-junction to the purified water tank of the water treatment module and the heat storage tanks in the heat storage module, ultimately connecting to the bottoms of the first, second, third, fourth, and Nth heat storage tanks, respectively. After the water in the partitioned heat exchanger is heated into steam, it is sent to the heat storage tanks. Its steam outlet pipe is also connected via a T-junction to the first to Nth heat storage tanks of the heat storage module, providing them with steam.

[0013] Another type is the power plant intermediate-pressure cylinder extraction and heat storage type, which extracts reheat steam from the inlet of the intermediate-pressure cylinder of the power plant for heat storage. The superheated steam is stored in the high-pressure water of the heat storage tank. When releasing heat, the pressure is reduced by throttling to generate steam, which then enters the steam heating tank and becomes industrial-grade steam that can be used as plant steam. This heat storage heat source system includes a boiler, a high-pressure cylinder, an intermediate-pressure cylinder, a low-pressure cylinder, a deaerator, three sets of high-pressure heaters, and four sets of low-pressure heaters. The reheat steam from the inlet of the intermediate-pressure cylinder enters through pipelines into the steam heat release pipe group at the bottom of the multi-stage parallel heat storage tank. The high-pressure steam is then injected into the heat storage tank through the pipe group to exchange heat with the cold water and store the heat.

[0014] This invention provides a method for using the aforementioned high-pressure thermal storage system for generating industrial steam. The working pressure of the thermal storage tank is 4~16.5 MPa, and the working pressure of the steam heating tank is 0.2~2 MPa, generating industrial steam at 120~220 ℃. The water volume in the thermal storage tank is calculated based on the tank volume and the density of saturated water under the target operating conditions, with a 5~10% margin for operational safety. The heat source module is a high-temperature waste heat recovery heating module. The specific operation process is as follows: (1) Water treatment: Open the first solenoid valve and the ordinary water pump to pump municipal water into the water treatment equipment; the water purified by the water treatment equipment is stored in the purified water tank; (2) High-temperature waste heat heating: Open the solenoid valve and high-pressure water pump, and the purified water comes out of the water tank and enters the partition heat exchanger as a heat storage medium to absorb the heat from the high-temperature waste heat source. (3) Heat storage stage: In the indirect heat exchanger, purified water is heated into high-temperature steam; the corresponding solenoid valve below the heat storage tank is opened, and the high-temperature steam enters the multi-stage parallel heat storage tank to store the heat. (4) Heat release process: A throttling valve is installed above the heat storage tank to control the generation of steam; the generated steam is heated to high temperature industrial grade steam by a steam heating tank; (5) Replenishing water in the heat storage tank: Open the corresponding solenoid valve at the bottom of the heat storage tank, and the water from the purified water tank will enter the heat storage tank through the three-way pipe to replenish the water.

[0015] This invention provides a method for using the above-mentioned thermal storage system for generating industrial steam. The working pressure of the thermal storage tank is 4~16.5 MPa, and the working pressure of the steam heating tank is 0.2~2 MPa, generating industrial steam at 120~220 ℃. The amount of water in the thermal storage tank needs to be calculated based on the tank volume and the density of saturated water under the target operating conditions, with a 5~10% margin for operational safety. The heat source comes from the heat storage system obtained by evacuating air from the intermediate pressure cylinder. The specific operation process is as follows: the heat storage step is different from the above method, but the rest is the same. The heat storage process is as follows: After the heat storage tank is filled with water, the reheat steam valve at the inlet of the intermediate pressure cylinder is opened. The reheat steam enters the first heat storage tank through the three-way pipe and mixes with the high-pressure water in the tank to store the heat. When the liquid in the first heat storage tank reaches 90% of the tank volume, the fourth solenoid valve is closed and the fifth solenoid valve is opened, and the steam enters the second heat storage tank. This process is repeated to store steam in N heat storage tanks in sequence.

[0016] The waste heat recovery and energy storage system proposed in this invention can achieve an energy storage density of 560~1260 kJ·kg –1 Compared to typical phase change energy storage (energy density is generally between 200 and 500 kJ·kg⁻¹), this is significantly better. –1 It has a higher energy storage density.

[0017] The system using high-temperature waste heat recovery as the heat source module in this invention can be applied to scenarios in steel enterprises and thermal power plants with a large amount of high-temperature solid waste. It not only solves the problem of waste heat but also helps to save energy and reduce carbon emissions. The system using steam extraction and heat storage as the heat source can be applied to thermal power plants that need to regulate peak loads. When peak load regulation and load reduction are needed, the load is not reduced, and steam extraction and heat storage are carried out to achieve decoupling of heating and power generation.

[0018] The beneficial effects of this invention are: (1) The present invention effectively solves the problem of low utilization and recovery rate of high temperature waste heat, which leads to a large amount of heat source waste.

[0019] (2) The high-temperature waste heat source of this system is not limited to the high-temperature slag generated during the power generation process of thermal power plants and the smelting process of blast furnaces, but can also be other forms of heat source.

[0020] (3) The heat source selected for this system can be the medium-pressure cylinder air extraction. When the load needs to be reduced, the load is not reduced. A portion of the medium-pressure cylinder air is extracted for heat storage. When the load is large, steam is released to achieve the peak-shaving effect.

[0021] (4) This system can generate industrial-grade steam, which can meet the steam demand of various industries.

[0022] (5) The special steam heat release structure design of the present invention consists of five pipes with uniform openings along the outer tangent circle of the steam heat release tube group, which realizes the uniform dispersion of steam in the high-pressure water body. At the same time, the heat exchange is enhanced by the turbulence generated by the structure, which increases the heat storage power by more than one time.

[0023] (6) This system is controlled by the on / off switch of a solenoid valve, and the signal acquisition and processing are controlled by a computer. The whole system is easy to realize automated assembly line operation.

[0024] (7) This invention can efficiently and effectively utilize industrial waste heat to produce steam and achieve high-density storage. It can also be applied to thermal power plants to achieve decoupling of heating and power generation. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a heat storage system in Example 1 where the heat source is waste heat recovery heating; Figure 2 for Figure 1 Schematic diagram of the structure of the steam heat release tube assembly; Figure 3 This is a front view of the steam heat release tube assembly; Figure 4 This is a side view of the steam heat release tube assembly; Figure 5 Top view of the steam heat release tube assembly; Figure 6 This is a schematic diagram of the heat source system for the medium-pressure cylinder extraction and heat storage system in Example 2.

[0026] In the diagram, 1-Ordinary water tank; 2-Municipal water supply; 3-First solenoid valve; 4-Ordinary water pump; 5-Water treatment equipment; 6-Purified water tank; 7-Second solenoid valve; 8-First flow meter; 9-First high-pressure pump; 10-Third solenoid valve; 11-Fourth solenoid valve; 12-Second flow meter; 13-First steam heat release pipe assembly; 14-First tee pipe; 15-Fifth solenoid valve; 16-Third flow meter; 17-Second steam heat release pipe assembly; 18-Second tee pipe; 19-Sixth solenoid valve; 20-Fourth flow meter; 21-Third steam heat release pipeline; 22-Third tee pipe; 23-Seventh solenoid valve; 24-Fifth flow meter; 25-Fourth steam heat release pipeline; 26-Fourth tee pipe. Pipe 27 - Eighth Solenoid Valve 28 - Sixth Flow Meter 29 - Fifth T-Way Pipe 30 - Ninth Solenoid Valve 31 - Seventh Flow Meter 32 - Sixth T-Way Pipe 33 - Tenth Solenoid Valve 34 - Eighth Flow Meter 35 - Eleventh Solenoid Valve 36 - Ninth Flow Meter 37 - First Thermal Storage Tank 38 - First Insulation Layer 39 - First Local Thermometer 40 - First Local Pressure Gauge 41 - First Remote Pressure Gauge 42 - First Remote Thermometer 43 - First Remote Level Gauge 44 - First Local Level Gauge 45 - Second Thermal Storage Tank 46 - Second Insulation Layer 47 - Second Local Thermometer 48 - Second Local Pressure Gauge 49 - Second Remote Pressure Gauge 50 - Second Remote Thermometer 51 - Second Remote Level Gauge 52 - Second Local Level Gauge 53 - Third Thermal Storage Tank 54 - Third Insulation Layer 55 - Third Local Thermometer 56 - Third Local Pressure Gauge 57 - Third Remote Pressure Gauge 58 - Third Remote Thermometer 59 - Third Remote Level Gauge 60 - Third Local Level Gauge 61 - Nth Thermal Storage Tank 62 - Nth Insulation Layer 63 - Nth Local Thermometer 64 - Nth Local Pressure Gauge 65 - Nth Remote Pressure Gauge 66 - Nth Remote Thermometer 67 - Nth Remote Level Gauge 68 - Nth Local Level Gauge 69 - Twelfth Solenoid Valve 70 - Tenth Flow Meter 71 - First Throttle Valve 72 - Thirteenth Solenoid Valve 73 -Eleventh Flow Meter 74-Second Throttle Valve 75-Seventh Three-Way Pipe 76-Fourteenth Solenoid Valve 77-Twelfth Flow Meter 78-Third Throttle Valve 79-Eighth Three-Way Pipe 80-Fifteenth Solenoid Valve 81-Thirteenth Flow Meter 82-Fourth Throttle Valve 83-Ninth Three-Way Pipe 84-Sixteenth Solenoid Valve 85-Fourteenth Flow Meter 86-Pressure Gauge 87-Thermometer 88-Electric Heating Wire 89-Steam Heating Tank 90-Second Insulation Layer 91-Fifteenth Flow Meter 92-Computer 93-Thirteenth Pipe 94-Seventeenth Solenoid Valve 95-Sixteenth Flow Meter 96-Indirect Heat Exchanger 97-Third Insulation Layer 98-High Temperature Waste Heat Source;99-Boiler; 100-High Pressure Cylinder; 101-Medium Pressure Cylinder; 102-Low Pressure Cylinder; 103-High Pressure Heater No. 1; 104-High Pressure Heater No. 2; 105-High Pressure Heater No. 3; 106-High Pressure Water Pump; 107-Deaerator; 108-Low Pressure Heater No. 4; 109-Low Pressure Heater No. 5; 110-Low Pressure Heater No. 6; 111-Low Pressure Heater No. 7. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings, but is not limited to the following embodiments. The principles and features of the invention are described below with reference to the accompanying drawings. The examples given are only for explaining the invention and are not intended to limit the scope of the invention. The invention is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the invention will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the invention.

[0028] Example 1 The thermal storage system provided in this embodiment uses high-temperature waste heat recovery as its heat source. The system using high-temperature waste heat recovery as its heat source module in this invention can be applied to scenarios in steel enterprises and thermal power plants that generate large amounts of high-temperature solid waste. This not only solves the problem of waste heat but also contributes to energy conservation and carbon reduction.

[0029] like Figure 1 As shown, a waste heat recovery and storage system for generating industrial steam, with the heat source being high-temperature waste heat recovery, comprises six parts: a water treatment module (A), a pipeline connection and control module, a high-temperature waste heat heating module (E), a remote signal acquisition and processing module (D), a heat storage module (B), and a steam heating module (C).

[0030] Before starting the entire system, ensure all solenoid valves are closed. Table 1 shows the calculation table for high-pressure energy storage properties. The working pressure of the thermal storage tank is 4~16.5 MPa, and the working pressure of the steam heating tank is 0.2~2 MPa, producing industrial steam at 120~220 ℃. The required water volume for the thermal storage tank needs to be calculated based on the tank volume and the density of saturated water under the target operating conditions, with a 5~10% margin for operational safety.

[0031] Table 1 Calculation Table of High-Pressure Energy Storage Properties The water treatment module is responsible for providing purified water that meets industrial requirements. When the first solenoid valve 3 and the ordinary water pump 4 are opened, the municipal water in the ordinary water tank 1 enters the water treatment equipment 5 through the first solenoid valve 3 and the ordinary water pump 4. After the water is purified to meet the requirements of boiler use, it is delivered to the purified water tank 6 for standby. After the purified water tank 6 is replenished, the first solenoid valve 3 and the ordinary water pump 4 are closed.

[0032] The pipeline connection and control module is the process control module for the entire thermal storage system, including steel pipes, ordinary water pumps, high-pressure water pumps, first to Nth solenoid valves, first to Nth flow meters, and first to Nth tee pipes. This module controls the flow, pressurization, and monitoring of the working fluid in the entire thermal storage system.

[0033] The high-temperature waste heat heating module includes a partition wall heat exchanger 96, which contains a high-temperature waste heat source 98 and a steam pipe. The partition wall heat exchanger is wrapped with a third insulation layer 97. The fluid inlet of the partition wall heat exchanger 96 is connected to the sixteenth flow meter 95 and the thirteenth pipe 93 in sequence through a steel pipe. The thirteenth pipe 93 is connected to the water treatment module and the heat storage module respectively. On the water treatment module side, it is connected to the purified water tank 6 through the third solenoid valve 10, the first high-pressure pump 9, the first flow meter 8, and the second solenoid valve 7. On the heat storage module side, it is connected to the bottom of the first heat storage tank 37, the bottom of the second heat storage tank 45, the bottom of the third heat storage tank 53, ..., the bottom of the Nth heat storage tank 61 through a three-way pipe, a solenoid valve, and a flow meter. Above the indirect heat exchanger is a steam outlet pipe, which is responsible for filling each heat storage tank with steam. The steam outlet is connected to the first tee pipe 14, the second tee pipe 18, and the third tee pipe 22 through steel pipes, and finally connected to the first heat storage tank 37, the second heat storage tank 45, the third heat storage tank 53, ... the Nth heat storage tank 61 respectively.

[0034] The thermal storage module includes N thermal storage tanks, steam heat release pipe groups in the thermal storage tanks and their supporting equipment. The N thermal storage tanks include a first thermal storage tank, a second thermal storage tank, a third thermal storage tank, a fourth thermal storage tank, ..., the Nth thermal storage tank. Each thermal storage tank is equipped with local pressure gauges, local thermometers, local level gauges, and remote pressure gauges, remote thermometers, and remote level gauges. The outer layer of each thermal storage tank should be covered with an insulation layer. Each thermal storage tank has the same structure; a steam heat release pipe assembly is installed at the bottom of the tank. The high-temperature, high-pressure steam generated by the heat source module is repressurized through openings in the steam heat release pipe assembly and injected into the cold water inside the tank for heat exchange. This allows for heating power density of 7 W / cm² without turbulence. 2 Increased to 15W / cm after adding turbulence 2The bottom of the thermal storage tank is connected to a water supply pipeline and a steam pipeline, each equipped with a solenoid valve and a flow meter. The water supply pipeline and steam pipeline are connected to the main pipeline via tee pipes, which in turn connect to the purified water tank and the indirect heat exchanger. The top of the thermal storage tank is connected to a steam venting pipeline, which is equipped with a solenoid valve, a flow meter, and a throttle valve. The steam venting pipeline is connected to the main pipeline via a tee pipe, which connects to the steam heating module. Specifically, the upper part of the first thermal storage tank 37 is connected in sequence to the twelfth solenoid valve 69, the tenth flow meter 70, and the first throttle valve 71 via steel pipes; the lower part is connected to the fourth three-way pipe 26 via the eighth solenoid valve 27 and the sixth flow meter 28; the upper part of the first thermal storage tank is equipped with a first local pressure gauge 40, a first local temperature gauge 39, a first remote pressure gauge 41, a first remote temperature gauge 42, and a first remote level gauge 43, and the side is equipped with a first local level gauge 44. The first local pressure gauge, the first local temperature gauge, and the first local level gauge are used to display the working status of the first thermal storage tank locally; the first remote pressure gauge, the first remote temperature gauge, and the first remote level gauge are respectively connected to a data collector via data transmission lines. The upper part of the second thermal storage tank is connected in sequence to the thirteenth solenoid valve 72, the eleventh flow meter 73, the second throttle valve 74, and the seventh three-way pipe 75 via steel pipes; the lower part is connected to the fifth three-way pipe 29 via the ninth solenoid valve 30 and the seventh flow meter 31. The upper part of the second thermal storage tank is equipped with a second local pressure gauge 48, a second local temperature gauge 47, a second remote pressure gauge 49, a second remote temperature gauge 50, and a second remote level gauge 51, while the side is equipped with a second local level gauge 52. The second local pressure gauge, second local temperature gauge, and second local level gauge are used to display the working status of the second thermal storage tank locally; the second remote pressure gauge, second remote temperature gauge, and second remote level gauge are respectively connected to a data collector via data transmission lines. This continues until the Nth thermal storage tank. The local level gauge is a glass tube level gauge, an intelligent capacitive level gauge, an electrical contact level gauge, a magnetic reversal level gauge, or an intelligent guided wave radar level gauge. During long-term operation, the level gauge needs to be compensated for the liquid level according to actual conditions.

[0035] The steam heat release tube assembly is placed at the bottom of the heat storage tank and connected to the steam pipeline at the bottom of the heat storage tank, and its structure is as follows: Figures 2-5 As shown, the heat release tube assembly consists of five circumferentially evenly arranged steam injection pipes. Each steam injection pipe has holes evenly provided on its wall along the tangent direction of the outer circle of the tube assembly. The direction of the holes on the five pipes is consistent with the tangent direction of the outer circle of the five pipes. The diameter of the holes is 4~12 mm.

[0036] The steam heating module includes a steam heating tank 89, a second insulation layer 90, an electric heating wire 88, a thermometer 87, and a pressure gauge 86. The steam heating tank 89 contains the electric heating wire 88 and is wrapped with an insulation layer. A local thermometer and a local pressure gauge are located on top. The left side of the steam heating tank is connected to an Nth tee pipe via a steel pipe, and the upper part is connected to a flow meter via a steel pipe.

[0037] The remote signal acquisition and processing module includes a data transmission line, a data collector, and a computer 92. The data transmission line ensures the connection between the data collector and the remote pressure gauges, remote thermometers, and remote level gauges in the thermal storage module and steam generation module. Remote data is collected by the data collector and sent to the computer, which processes and corrects the data signals from the remote pressure gauges, remote thermometers, and remote level gauges.

[0038] In this embodiment, the heat source module is the high-temperature waste heat heating module (E) shown in the figure. Purified water is pumped into the indirect heat exchanger 96 of the waste heat recovery module via a high-pressure water pump. After being heated by the high-temperature waste heat, the water is converted into a high-temperature steam medium. The generated steam enters a multi-stage parallel heat storage tank to store the heat. The high-temperature waste heat heating module includes the indirect heat exchanger 96, which contains a high-temperature waste heat source 98 and steam pipes. The indirect heat exchanger is wrapped with a third insulation layer 97. The fluid inlet of the indirect heat exchanger is connected to the purified water tank 6 of the water treatment module and the heat storage tanks in the heat storage module via a T-junction pipe, ultimately connecting to the bottoms of the first heat storage tank 37, the second heat storage tank 45, the third heat storage tank 53, the fourth heat storage tank, and the Nth heat storage tank 61, respectively. After the water in the indirect heat exchanger is heated into steam, it is sent to the heat storage tanks. Its steam outlet pipe is connected to the first to Nth heat storage tanks of the heat storage module via a T-junction pipe, providing them with steam.

[0039] The following describes the workflow of a thermal energy storage system, including the following steps: (1) Water treatment: Open the first solenoid valve and the ordinary water pump to pump municipal water into the water treatment equipment; the water purified by the water treatment equipment is stored in the purified water tank; (2) Water filling process: Before the entire thermal storage system starts working, each thermal storage tank is first filled with water. Open the second solenoid valve, the first high-pressure water pump, the third solenoid valve and the fourth solenoid valve. The purified water comes out of the water tank, is pressurized and flows through the first three-way pipe, the fourth three-way pipe 26, the eighth solenoid valve 27 and the sixth flow meter 28 into the first thermal storage tank 37. After the water filling is completed, close the eighth solenoid valve and the water filling of the first thermal storage tank is completed. Open the ninth solenoid valve 30 and the purified water flows through the fifth three-way pipe 29, the ninth solenoid valve 30 and the seventh flow meter 31 into the second thermal storage tank 45 to fill the second thermal storage tank. And so on, to complete the water filling of N thermal storage tanks.

[0040] (3) High-temperature waste heat heating and storage: After water filling is completed, the second solenoid valve, the first high-pressure water pump, the third solenoid valve 10, and the fourth solenoid valve 11 are opened. The purified water comes out of the water tank, is pressurized, and flows through the thirteenth-way pipe 93 as a heat storage medium into the partition heat exchanger 96 to absorb the heat from the high-temperature waste heat source and become high-temperature steam. The high-temperature steam enters the first heat storage tank through the first three-way pipe and mixes with the purified water in the tank through the steam heat release pipeline to store the heat; such as Figures 2-5 As shown, high-temperature, high-pressure steam is ejected from five steam heat release pipes along the direction of the tangent circular openings. This causes the cold water inside the heat storage tank to form a vortex outside the steam heat release pipes, achieving rapid heat exchange between the steam and the cold water. When the liquid in the first heat storage pipe reaches 90% of the tank volume, the fourth solenoid valve is closed and the fifth solenoid valve is opened, allowing the high-temperature steam to enter the second heat storage tank; and so on, high-temperature steam can be stored in N heat storage tanks sequentially.

[0041] (4) Heat release process: During heat release, the 12th solenoid valve 69 and the 1st throttle valve 71 above the first heat storage tank are opened, and the pressure in the tank is reduced to generate steam; the 16th solenoid valve 84 on the left side of the steam heating tank 89 is opened, and the generated steam enters the steam heating tank 89 through the 7th three-way pipe 75, the 8th three-way pipe 79, the 9th three-way pipe 83, the 16th solenoid valve 84 and the 14th flow meter 85 and is heated to high temperature industrial grade steam; according to the flow meter monitoring, when the first heat storage tank finishes venting, the 12th solenoid valve 69 and the 1st throttle valve 71 are closed, and the heat release of the first heat storage tank ends; the 13th solenoid valve 72 and the 2nd throttle valve 74 above the second heat storage tank are opened, and the pressure in the second heat storage tank is reduced to generate steam; and so on, gradually releasing heat to N heat storage tanks.

[0042] After all the thermal storage tanks have finished releasing heat, close the solenoid valves and throttle valves on top of the thermal storage tanks, and begin the water replenishment process.

[0043] (5) Replenishing water in the heat storage tank: During the heat release process, the water volume in the heat storage tank decreases. The fifth solenoid valve below the first heat storage tank is opened, and the water from the purified water tank enters the first heat storage tank for replenishment through the fourth three-way pipe 26, the eighth solenoid valve 27 and the sixth flow meter 28. The water inlet pipe at the bottom of the first thermal storage tank is connected to the sixth flow meter, the eighth solenoid valve, and the fourth three-way pipe. Opening the eighth solenoid valve allows pressurized purified water to enter the first thermal storage tank via the tenth and fourth three-way pipes. The water replenishment process is the same as the filling process described above. Similarly, the ninth and tenth solenoid valves are opened to control the water replenishment of the second and third thermal storage tanks.

[0044] Example 2 like Figure 6As shown, a medium-pressure cylinder extraction and heat storage system for generating industrial steam includes six parts: a water treatment module (A), a pipeline connection and control module, a remote signal acquisition and processing module (D), a heat storage module (B), a steam heating module (C), and a heat source module (E).

[0045] The system differs from Example 1 only in the heat source for heat storage, which in this example is reheat steam from the inlet of the intermediate-pressure cylinder.

[0046] Another type is the power plant intermediate-pressure cylinder extraction and heat storage type, which extracts reheat steam from the inlet of the intermediate-pressure cylinder of the power plant for heat storage. The superheated steam is stored in the high-pressure water of the heat storage tank. When releasing heat, the pressure is reduced by throttling to generate steam, which then enters the steam heating tank and becomes industrial-grade steam that can be used as plant steam. This heat storage heat source system includes a boiler 99, a high-pressure cylinder 100, an intermediate-pressure cylinder 101, a low-pressure cylinder 102, a deaerator 107, three sets of high-pressure heaters 103, 104, and 105, and four sets of low-pressure heaters. The reheat steam from the inlet of the intermediate-pressure cylinder enters through pipelines into the steam heat release pipe group at the bottom of the multi-stage parallel heat storage tank. The high-pressure steam is then injected into the heat storage tank through the pipe group to exchange heat with the cold water and store the heat.

[0047] This embodiment uses a system with extracted steam for thermal storage as a heat source, applied in a thermal power plant requiring peak shaving. When peak shaving and load reduction are needed, the load is not reduced; instead, steam is extracted for thermal storage, decoupling heating and power generation. The startup and operation methods of the entire system are the same as in Embodiment 1. When the thermal system load decreases at night, the intake air from the intermediate-pressure cylinder can be extracted and stored in the various stages of the thermal storage tanks without reducing the load. The heat release process is the same as in Embodiment 1. When the thermal system load is high during the day, high-temperature steam heated by the steam heater can be released to supplement the system's deaerator 107 to achieve peak shaving. It should be noted that when using the intermediate-pressure cylinder for steam extraction and thermal storage, water needs to be supplied to the system via a feedwater pump to avoid disrupting the thermal system balance.

[0048] In this embodiment, the heat source comes from the heat storage of air extracted from the intermediate pressure cylinder. The specific operation process is as follows: (1) Water treatment: Open the first solenoid valve and the ordinary water pump to pump municipal water into the water treatment equipment; the water purified by the water treatment equipment is stored in the purified water tank; (2) Water filling process: Before the entire thermal storage system starts working, each thermal storage tank is first filled with water. Open the second solenoid valve, the first high-pressure water pump, the third solenoid valve and the fourth solenoid valve. The purified water comes out of the water tank, is pressurized and flows through the first three-way pipe, the fourth three-way pipe 26, the eighth solenoid valve 27 and the sixth flow meter 28 into the first thermal storage tank 37. After the water filling is completed, close the eighth solenoid valve and the water filling of the first thermal storage tank is completed. Open the ninth solenoid valve 30 and the purified water flows through the fifth three-way pipe 29, the ninth solenoid valve 30 and the seventh flow meter 31 into the second thermal storage tank 45 to fill the second thermal storage tank. And so on, to complete the water filling of N thermal storage tanks.

[0049] (3) Heat storage process: After the heat storage tank is filled with water, the reheat steam valve at the inlet of the medium-pressure cylinder is opened. The reheat steam enters the first heat storage tank through the first three-way pipe and mixes with the high-pressure water in the tank to store the heat. When the liquid in the first heat storage pipe reaches 90% of the tank volume, the fourth solenoid valve is closed and the fifth solenoid valve is opened, and the steam enters the second heat storage tank. This process can be repeated to store steam in N heat storage tanks in sequence.

[0050] (4) Heat release process: Open the 12th solenoid valve 69 and the 1st throttle valve 71 above the first heat storage tank, and the pressure in the tank decreases to generate steam; open the 16th solenoid valve 84 on the left side of the steam heating tank 89, and the generated steam enters the steam heating tank 89 through the 7th three-way pipe 75, the 8th three-way pipe 79, the 9th three-way pipe 83, the 16th solenoid valve 84 and the 14th flow meter 85 and is heated to high temperature industrial grade steam; according to the flow meter monitoring, when the first heat storage tank finishes venting, close the 12th solenoid valve 69 and the 1st throttle valve 71, and the heat release of the first heat storage tank ends; open the 13th solenoid valve 72 and the 2nd throttle valve 74 above the second heat storage tank, and the pressure in the second heat storage tank decreases to generate steam; and so on, gradually releasing heat to N heat storage tanks.

[0051] (5) Water replenishment of the heat storage tank: During the heat release process, the water volume in the heat storage tank decreases. The fifth solenoid valve below the first heat storage tank is opened, and the water from the purified water tank enters the first heat storage tank for water replenishment through the fourth three-way pipe, the eighth solenoid valve and the sixth flow meter. Similarly, the ninth solenoid valve, the tenth solenoid valve, etc. are opened to control the water replenishment of the second and third heat storage tanks.

[0052] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Those skilled in the art can readily implement the present invention based on the accompanying drawings and the description above. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the present invention, using the disclosed technical content, are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, or variations made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the present invention.

Claims

1. A high-pressure thermal storage system for generating industrial steam, characterized in that: It consists of six parts: water treatment module, pipeline connection and control module, heat source module, thermal storage module, remote signal acquisition and processing module, and steam heating module. The heating and storage of the thermal storage medium and the heating of steam are completed in the heat source module, thermal storage module, and steam heating module, respectively. The water treatment module processes tap water into water that meets the water quality requirements for entering the boiler system; the water treatment module includes a general water tank, water treatment equipment, and a purified water tank; the general water tank contains municipal water, and the general water tank is connected to the water treatment equipment through a first solenoid valve and a general water pump; The pipeline connection and control module is the process control module for the entire thermal storage system, including steel pipes, ordinary water pumps, a first high-pressure pump, first to Nth solenoid valves, first to Nth flow meters, and first to Nth tee pipes; this module controls the flow, pressure increase, and detection of the working fluid in the entire thermal storage system; the pipeline connection and information transmission module is used to transmit water and steam, enabling the entire system to operate stably. The thermal storage module is used to store the heat in high-temperature and high-pressure steam and generate the required industrial steam through throttling and pressure reduction. The thermal storage module includes N thermal storage tanks, steam heat release tube assemblies within the tanks, and their supporting equipment. The N thermal storage tanks include a first thermal storage tank, a second thermal storage tank, a third thermal storage tank, a fourth thermal storage tank, and so on up to the Nth thermal storage tank. Each thermal storage tank is equipped with a local pressure gauge, a local thermometer, a local level gauge, and a remote pressure gauge, a remote thermometer, and a remote level gauge. A steam heat release tube assembly is located at the bottom of each thermal storage tank, containing the working fluid... Water is heated into high-temperature steam in the heat source module. The high-temperature steam is transported through pipelines to the steam heat release pipe group connected to the bottom of the heat storage tank. The specially designed jet structure of the pipe group forms high-pressure steam that mixes with the cold water in the tank. The steam heat release pipe group is connected to the steam pipeline at the bottom of the heat storage tank. The heat release pipe group consists of five circumferentially evenly arranged steam jet pipes. Each steam jet pipe has holes evenly provided along the tangent direction of the outer circle of the pipe group on its pipe wall. The direction of the holes on the five pipes is consistent with the tangent direction of the outer circle of the five pipes. The diameter of the holes is 4~12 mm. The steam heating module includes a steam heating tank, an insulation layer, an electric heating wire, a local thermometer, and a local pressure gauge; The remote signal acquisition and processing module includes a data transmission line, a data collector, and a computer; The heat source module is used to heat purified water into high-temperature, high-pressure steam for the target operating conditions. The heat source module includes either of the following two types: one is a high-temperature waste heat recovery type, in which purified water is pumped into the indirect heat exchanger of the waste heat recovery module by a high-pressure water pump. After being heated by high-temperature waste heat, the water is converted into a high-temperature steam medium. The generated steam enters a multi-stage parallel heat storage tank to store the heat. The high-temperature waste heat heating module includes an indirect heat exchanger, which contains a high-temperature waste heat source and steam pipes. The other type is a power plant intermediate-pressure cylinder extraction and heat storage type, which extracts reheat steam from the inlet of the power plant intermediate-pressure cylinder for heat storage. The superheated steam is stored in the high-pressure water of the heat storage tank. When releasing heat, the pressure is reduced by throttling to generate steam, which enters the steam heating tank and becomes industrial-grade steam for plant use.

2. The high-pressure thermal storage system for generating industrial steam according to claim 1, characterized in that: In the water treatment process, the water treatment equipment purifies the water to meet the boiler's usage requirements and then delivers it to the purified water tank for standby. Once the purified water tank is replenished, the first solenoid valve and the ordinary water pump are shut off.

3. The high-pressure thermal storage system for generating industrial steam according to claim 1, characterized in that: The steel pipe serves as the connecting element for the entire system. The ordinary water pump is located between the ordinary water tank and the water treatment equipment. The high-pressure water pump is a high-pressure boiler feed pump, which is located between the water treatment module and the high-temperature waste heat heating module. The operating temperature is ambient temperature, and the pressure difference before and after the pump is required to be above 16 MPa. The solenoid valve, flow meter, tee pipe, and corresponding pipelines are required to withstand a pressure of above 16 MPa. The flow meter is divided into a water mass flow meter and a steam mass flow meter.

4. The high-pressure thermal storage system for generating industrial steam according to claim 1, characterized in that: The outer layer of the heat storage tank should be wrapped with an insulation layer, and the structure of each heat storage tank is the same. The bottom of the heat storage tank is connected to a water supply pipeline and a steam pipeline. The water supply pipeline and the steam pipeline are respectively equipped with a solenoid valve and a flow meter. The water supply pipeline and the steam pipeline are respectively connected to the main pipeline through a T-connector. The main pipeline is connected to the purified water tank and the heat source module respectively. The top of the heat storage tank is connected to a steam venting pipeline. The steam venting pipeline is equipped with a solenoid valve, a flow meter and a throttle valve. The steam venting pipeline is connected to the main pipeline through a T-connector. The main pipeline is connected to the steam heating module.

5. The high-pressure thermal storage system for generating industrial steam according to claim 1, characterized in that: The steam heating tank is equipped with an electric heating wire inside and is wrapped with an insulation layer on the outside. A local thermometer and a local pressure gauge are installed on the top. The left side of the steam heating tank is connected to a tee pipe through a steel pipe, and the top is connected to a flow meter through a steel pipe.

6. The high-pressure thermal storage system for generating industrial steam according to claim 1, characterized in that: The data transmission line ensures the connection between the data collector and the remote pressure gauges, remote thermometers, and remote level gauges in the thermal storage module and steam generation module. Remote data is collected by the data collector and enters the computer, which processes and corrects the data signals from the remote pressure gauges, remote thermometers, and remote level gauges.

7. The high-pressure thermal storage system for generating industrial steam according to claim 1, characterized in that: The heat source system for medium-pressure cylinder extraction and heat storage includes a boiler, a high-pressure cylinder, a medium-pressure cylinder, a low-pressure cylinder, a deaerator, three sets of high-pressure heaters, and four sets of low-pressure heaters. The reheat steam at the inlet of the medium-pressure cylinder enters the steam heat release tube group at the bottom of the multi-stage parallel heat storage tank through pipelines. The high-pressure steam is then injected into the heat storage tank through the tube group to exchange heat with cold water and store the heat.

8. The high-pressure thermal storage system for generating industrial steam according to claim 1, characterized in that: The indirect heat exchanger is wrapped with an insulation layer. The fluid inlet of the indirect heat exchanger is connected to the purified water tank of the water treatment module and the heat storage tank in the heat storage module through a three-way pipe, and finally connected to the bottom of the first heat storage tank, the bottom of the second heat storage tank, the bottom of the third heat storage tank, the bottom of the fourth heat storage tank, and so on up to the bottom of the Nth heat storage tank. After the water in the indirect heat exchanger is heated into steam, it is sent to the heat storage tank. Its steam outlet pipe is connected to the first to Nth heat storage tanks of the heat storage module through a three-way pipe to provide steam to them.

9. A method of using a high-pressure thermal storage system for generating industrial steam according to any one of claims 1 to 7, characterized in that: A system using extracted steam thermal storage as a heat source is applied in thermal power plants that require peak shaving. When peak shaving and load reduction are needed, the load is not reduced; instead, steam is extracted and stored, thus decoupling heating and power generation. The specific operation process is as follows: (1) Water treatment: Open the first solenoid valve and the ordinary water pump to pump municipal water into the water treatment equipment; the water purified by the water treatment equipment is stored in the purified water tank; (2) Water filling process: Before the entire thermal storage system starts working, each thermal storage tank is filled with water first; the second solenoid valve, the first high-pressure water pump, the third solenoid valve and the fourth solenoid valve are opened, and the purified water comes out of the water tank, is pressurized and flows through the first three-way pipe, the fourth three-way pipe, the eighth solenoid valve and the sixth flow meter into the first thermal storage tank. After the water filling is completed, the eighth solenoid valve is closed, and the water filling of the first thermal storage tank is completed; the ninth solenoid valve is opened, and the purified water flows through the fifth three-way pipe, the ninth solenoid valve and the seventh flow meter into the second thermal storage tank to fill the second thermal storage tank; and so on, to complete the water filling of N thermal storage tanks; (3) Heat storage stage: After the heat storage tank is filled with water, the reheat steam valve at the inlet of the medium-pressure cylinder is opened. The reheat steam enters the first heat storage tank through the first three-way pipe and mixes with the high-pressure water in the tank to store the heat. When the liquid in the first heat storage pipe reaches 90% of the tank volume, the fourth solenoid valve is closed and the fifth solenoid valve is opened, and the steam enters the second heat storage tank. This process is repeated to store the steam in N heat storage tanks in sequence. (4) Heat release process: Open the twelfth solenoid valve and the first throttle valve above the first heat storage tank, and the pressure in the tank decreases to generate steam; open the sixteenth solenoid valve on the left side of the steam heating tank, and the generated steam enters the steam heating tank through the seventh three-way pipe, the eighth three-way pipe, the ninth three-way pipe, the sixteenth solenoid valve and the fourteenth flow meter to be heated into high-temperature industrial-grade steam; according to the flow meter monitoring, when the first heat storage tank finishes venting, close the twelfth solenoid valve and the first throttle valve, and the heat release of the first heat storage tank ends; open the thirteenth solenoid valve and the second throttle valve above the second heat storage tank, and the pressure in the second heat storage tank decreases to generate steam; and so on, gradually releasing heat to N heat storage tanks; (5) Replenishing water in the heat storage tank: During the heat release process, the water volume in the heat storage tank decreases. Open the fifth solenoid valve below the first heat storage tank, and the water from the purified water tank enters the first heat storage tank through the fourth three-way pipe, the eighth solenoid valve and the sixth flow meter to replenish water; and so on, gradually replenishing water to the heat storage tank.

10. A method of using a high-pressure thermal storage system for generating industrial steam according to any one of claims 1 to 6 or 8, characterized in that: When the heat source module is a high-temperature waste heat recovery heating module, this system is suitable for steel companies and thermal power plants that have a large amount of high-temperature solid waste. It not only solves the problem of waste heat but also helps to save energy and reduce carbon emissions. The specific operation process is as follows: (1) Water treatment: Open the first solenoid valve and the ordinary water pump to pump municipal water into the water treatment equipment; the water purified by the water treatment equipment is stored in the purified water tank; (2) Water filling process: Before the entire thermal storage system starts working, each thermal storage tank is filled with water first; the second solenoid valve, the first high-pressure water pump, the third solenoid valve and the fourth solenoid valve are opened, and the purified water comes out of the water tank, is pressurized and flows through the first three-way pipe, the fourth three-way pipe, the eighth solenoid valve and the sixth flow meter into the first thermal storage tank. After the water filling is completed, the eighth solenoid valve is closed, and the water filling of the first thermal storage tank is completed; the ninth solenoid valve is opened, and the purified water flows through the fifth three-way pipe, the ninth solenoid valve and the seventh flow meter into the second thermal storage tank to fill the second thermal storage tank; and so on, to complete the water filling of N thermal storage tanks; (3) High-temperature waste heat heating and heat storage process: After filling with water, open the second solenoid valve, the first high-pressure water pump, the third solenoid valve and the fourth solenoid valve. The purified water comes out of the water tank, is pressurized and flows through the thirteenth pipe as a heat storage medium to enter the partition heat exchanger to absorb the heat from the high-temperature waste heat source and become high-temperature steam. The high-temperature steam enters the first heat storage tank through the first three-way pipe and mixes with the purified water in the tank through the steam heat release pipeline to store the heat. The high-temperature and high-pressure steam is ejected along the opening direction of the outer tangent circle in the five steam heat release pipelines, which will drive the cold water inside the heat storage tank to form a vortex on the outside of the steam heat release pipeline, realizing rapid heat exchange between steam and cold water. When the liquid in the first heat storage pipe reaches 90% of the tank volume, close the fourth solenoid valve and open the fifth solenoid valve. The high-temperature steam enters the second heat storage tank. In this way, the high-temperature steam can be stored in N heat storage tanks in sequence. (4) Heat release process: During heat release, the twelfth solenoid valve and the first throttle valve above the first heat storage tank are opened, and the pressure in the tank decreases to generate steam; the sixteenth solenoid valve on the left side of the steam heating tank is opened, and the generated steam enters the steam heating tank through the seventh three-way pipe, the eighth three-way pipe, the ninth three-way pipe, the sixteenth solenoid valve and the fourteenth flow meter to be heated into high-temperature industrial-grade steam; according to the flow meter monitoring, when the first heat storage tank finishes venting, the twelfth solenoid valve and the first throttle valve are closed, and the heat release of the first heat storage tank ends; the thirteenth solenoid valve and the second throttle valve above the second heat storage tank are opened, and the pressure in the second heat storage tank is reduced to generate steam; and so on, gradually releasing heat to N heat storage tanks; After all the heat storage tanks have finished releasing heat, close the solenoid valve and throttle valve on top of the heat storage tanks and begin the water replenishment process; (5) Replenishing water in the heat storage tank: During the heat release process, the water volume in the heat storage tank decreases. The fifth solenoid valve below the first heat storage tank is opened, and the water from the purified water tank enters the first heat storage tank for replenishment through the fourth three-way pipe, the eighth solenoid valve and the sixth flow meter. The water inlet pipe below the first thermal storage tank is connected to the sixth flow meter, the eighth solenoid valve, and the fourth three-way pipe. When the eighth solenoid valve is opened, the pressurized purified water enters the first thermal storage tank through the tenth and fourth three-way pipes to replenish the water. The water replenishment process is the same as the water filling process described above. In this way, the thermal storage tanks are gradually replenished with water.

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