A turbulence-type ultra-high pressure thermal storage steam electric boiler system and its control method

Abstract

This invention discloses a turbulence-type ultra-high pressure thermal storage steam electric boiler system and its control method. The system generates steam using a self-pressurization and flash evaporation method. The system includes a water treatment module (A), a steam turbulence module (B), a steam generation module (C), a compensating heating module (D), and a pipeline connection and information transmission module. This invention uses circulating water as the energy storage medium, storing excess electrical energy as heat energy by electrically heating the water. Industrial steam is generated by controlling solenoid valves and steam flash valves. This invention can serve as an electrical energy transfer terminal, converting off-peak electricity into heat energy and storing it in multiple parallel electric heating boilers. Industrial steam is obtained by adjusting the boiler valves according to actual needs, allowing for flexible use.

Description

Technical Field

[0001] This invention relates to an ultra-high pressure steam boiler system and control method utilizing off-peak electricity for thermal storage, specifically a turbulence-type ultra-high pressure thermal storage steam electric boiler system and control method, belonging to the field of industrial steam production. Background Technology

[0002] As the installed capacity of new energy sources such as wind and solar power, which are characterized by fluctuations and randomness, gradually increases in the power system, the importance and economic value of energy storage are becoming increasingly apparent. Currently, coal-fired boilers remain the main source of industrial steam supply, with a small portion supplied by gas-fired boilers. Under the new national energy policy, the tightening of carbon emission standards is an inevitable trend, making the adoption of cleaner methods to supply industrial steam the most challenging technical hurdle. Heat pumps, as an energy-saving and efficiency-enhancing technology, can utilize various industrial waste heat, air sources, water sources, and soil as heat sources to generate steam at around 120°C with high energy efficiency, showing potential for development in small-capacity, low-parameter steam supply. However, for large-scale industrial applications, limitations exist due to the energy density and quality of heat pump heat sources, as well as lower energy efficiency and numerous technical bottlenecks when producing higher-temperature steam. Therefore, large-scale steam supply, or higher-parameter (150°C–200°C) steam supply, requires new technological approaches. Furthermore, considering the future shift of new energy consumption costs to industrial users and the increasing peak-valley electricity price difference, efficiently utilizing off-peak electricity for energy storage to produce industrial steam has both economic and environmental value. Summary of the Invention

[0003] This invention aims to provide a turbulent, ultra-high pressure thermal energy storage steam boiler system and its control method, involving user-end energy storage to replace high-emission steam boilers using coal and gas as raw materials. The invention provides equipment, a system, and a control method for storing energy by heating water using off-peak electricity. Off-peak electricity is stored as the latent heat of water in high-temperature, high-pressure water (250℃–350℃), and industrial steam with given parameters is released during peak electricity periods through flash evaporation. The system provided by this invention can be modularized and integrated, and the energy storage density can reach 260 kJ. . kg –1 -1260 kJ . kg –1 Compared to typical phase change energy storage (energy density is generally around 200 kJ), . kg –1 – 500 kJ . kg –1 It has a higher energy storage density.

[0004] In this invention, water is used as the energy storage medium to convert excess electrical energy during off-peak hours into thermal energy. Water in an ultra-high pressure boiler is heated to achieve energy storage. Through self-pressurization and flash evaporation, the water is converted into industrial steam. Addressing the surplus of thermal, nuclear, and hydropower in the power grid, this invention is applied to the field of deep peak shaving in the power grid, alleviating the pressure on peak shaving. Furthermore, considering the fluctuating output of wind and solar power in the power grid, the variable power electric heating device involved in this invention can effectively absorb wind and solar power, reduce the curtailment rate of wind and solar power, and achieve rational energy utilization.

[0005] This invention provides a turbulence-type ultra-high pressure thermal storage steam electric boiler system, comprising: a water treatment module (A), a steam turbulence module (B), a steam generation module (C), a compensating heating module (D), and a pipeline connection and information transmission module.

[0006] 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 first general water pump. The other end of the water treatment equipment is connected to the purified water tank, which has two outlets and one inlet. The inlet is located at the top of the tank and is connected to the water treatment equipment. The left outlet is connected to a second solenoid valve, which, along with the first liquid flow meter and a second high-pressure pump, connects to a steam turbulence module. The right outlet is connected to a third solenoid valve, and the water treatment module is connected to a steam generation module via the solenoid valve and the high-pressure water pump.

[0007] The steam turbulence module includes a turbulence tank and insulation layer, an electric heater for the turbulence tank, a steam-water separator for the turbulence tank, an electronic level gauge for the turbulence tank, a pressure sensor for the turbulence tank, first and second temperature sensors for the turbulence tank, and a local level gauge for the turbulence tank. The turbulence tank contains an electric heater and a steam-water separator. A steam outlet is located at the top of the turbulence tank, connected to a solenoid valve. A local level gauge is connected to the left side of the turbulence tank, and the electronic level gauge, pressure sensor, and first and second temperature sensors are connected sequentially from top to bottom on the right side of the turbulence tank. Furthermore, all temperature sensors, pressure sensors, and the electronic level gauge transmit signals to the control terminal. The electronic level gauge monitors the liquid level inside the tank; the pressure gauge monitors the pressure inside the tank; the first temperature sensor monitors the temperature inside the tank; the second temperature sensor monitors the external temperature of the insulation layer to verify the insulation effect; and the local level gauge provides a direct view of the liquid level inside the tank.

[0008] The steam generating module contains N groups of electric heating units, all of which are connected in parallel. Each electric heating unit consists of an electric heating boiler and its supporting equipment, and the connection method between the electric heating boiler and the supporting equipment in each unit is the same.

[0009] Each electric heating unit includes an electric heating boiler, which contains an electric heater, a steam turbulence pipe, and a steam-water separator. The boiler body is covered with an insulation layer. From top to bottom, an electronic level gauge, a pressure sensor, a first temperature sensor, and a second temperature sensor are arranged on the left side of the boiler body. The right side of the boiler body is connected to a local level gauge. A steam outlet is located at the top of the boiler body, connected to a first solenoid valve. Steam enters the electrically compensated heating module through a steam channel formed by this solenoid valve, a first flash solenoid valve, and a first gas flow meter. The steam discharge path of the first electric heating boiler consists of this solenoid valve, the first electric heating boiler gas flow meter, and the connected steam channel. The bottom of the electric heating boiler body has, from left to right, an inlet, a pressure relief port, and a drain port. The inlet is connected to a first liquid flow meter, and purified water enters the electric heating boiler via a high-pressure pump, a second solenoid valve, and the first liquid flow meter. The pressure relief port is controlled by a safety pressure relief valve; when overpressure occurs inside the boiler during heating, some water inside the boiler can be discharged through the first pressure relief valve to achieve a pressure reduction effect. The drain port is connected to a third solenoid valve, which discharges water from the heating furnace. Furthermore, all temperature sensors, pressure sensors, and electronic level gauges transmit signals to the control terminal. The electronic level gauge monitors the liquid level inside the furnace; the pressure sensor monitors the pressure inside the furnace; the first temperature sensor monitors the temperature inside the furnace; and the second temperature sensor monitors the external temperature of the insulation layer to verify the insulation effect. A local level gauge provides a direct view of the liquid level inside the furnace.

[0010] The compensating heating module includes a compensating heating tank, a compensating heating tank insulation layer, a compensating heater, first and second temperature sensors, and a pressure sensor. The compensating heating tank contains a compensating heater, and the outside of the tank is wrapped with an insulation layer. The left side wall is connected to the first and second temperature sensors and the pressure sensor. A second main gas flow meter is connected to the bottom of the compensating heating tank. Furthermore, all temperature and pressure sensors transmit signals to the control terminal. The pressure sensor monitors the pressure inside the tank, the first temperature sensor monitors the temperature inside the tank, and the second temperature sensor monitors the external temperature of the insulation layer and verifies the insulation effect.

[0011] The pipeline connection and information transmission module serves as the connection and control module for the entire thermal storage boiler system. This module includes water channels, steam channels, signal channels, ordinary water pumps, high-pressure pumps, solenoid valves, flash solenoid valves, liquid flow meters, gas flow meters, and safety relief valves. The entire system is insulated. The ordinary water pumps are located between the ordinary water tank and the water treatment equipment. The high-pressure pumps are all high-pressure boiler feed pumps, located between the water treatment module and the steam generation module and steam turbulence module, respectively. There are numerous solenoid valves, safety relief valves, flash solenoid valves, and flow meters; their distribution will be described in detail later. Valves, flow meters, and pumps are connected to the water and steam channels via flanges. The water and steam channels are used to transport water and steam. The signal channel ensures the connection of pressure and temperature sensors, level gauges, pumps, electric heating devices, and solenoid valves in each module to the computer terminal. The computer terminal receives data signals and controls the opening and closing of solenoid valves, and the start and stop of pumps and electric heating devices via this channel, maintaining the normal operation of the entire system.

[0012] Furthermore, taking the steam channel in the first electric heating furnace as an example, the channel includes a steam turbulence branch, which consists of four parts: a turbulence main channel, a turbulence branch, a turbulence conduit, and a turbulence U-shaped tube. The turbulence branch is distributed intersecting between the electric heaters. Specifically, the turbulence branch in each electric heating furnace is divided into three layers, all on the same horizontal plane as the electric heater. The turbulence U-shaped tube of the turbulence branch surrounds the electric heater. The turbulence branch is distributed intersecting with the electric heater at a certain interval (0.3~0.5 m) on the same horizontal plane.

[0013] The main turbulence path has an inner diameter of 85 mm–95 mm and a wall thickness of 5 mm–10 mm. Its length within an electric boiler is 3 m–8 m. There are 3–6 turbulence branches evenly distributed perpendicular to the main turbulence path. These branches are connected to the main turbulence path and located within the electric boiler of the steam generation module. The turbulence branches are distributed around the electric heater. Turbulence U-shaped pipes are connected to the branches via turbulence transfer guides. Turbulence transfer guides are located at the upper, lower, or middle ends of the branches, with a curvature ranging from 0.8 to 1 to reduce friction loss. The inner diameters of the branches, U-shaped pipes, and transfer guides are all 30 mm–50 mm, with a wall thickness of 5 mm–10 mm. The U-shaped pipe surrounds the electric heater and has turbulence steam injection holes with a diameter of 2 mm–4 mm, distributed in both horizontal and upward angles of 30°–60°. After the purified water inside the furnace is heated to boiling, the high heat flux density of the electric heater causes a large steam film to form on its surface, enveloping the water. Heat can only be transferred to the water through the steam, significantly reducing heat transfer efficiency and causing heat transfer deterioration, which can even lead to heater burnout in severe cases. To avoid this, this invention incorporates a steam turbulence diversion channel. High-pressure steam generated by the steam turbulence diversion tank is injected through the steam turbulence diversion channel in the steam channel, forming turbulence that disperses the gas film enveloping the electric heater, thereby enhancing heat transfer and preventing heat transfer deterioration.

[0014] This invention provides a control method for the aforementioned turbulence-type ultra-high pressure thermal storage steam electric boiler system. The operating pressure of the steam turbulence tank is 4.2 MPa–16.7 MPa, and the operating pressure of the electric heating boiler is 4 MPa–16.5 MPa, generating industrial steam at 120 ℃–220 ℃. The water volume of the electric heating boiler needs to be calculated based on the tank volume and the density of saturated water under the target operating conditions, with a 30% margin for operational safety.

[0015] This invention is applied to power plant peak shaving, converting excess electrical energy during off-peak hours into thermal energy for storage and providing industrial steam, thus realizing the consumption of clean energy and saving energy.

[0016] The beneficial effects of this invention are:

[0017] (1) This invention stores excess electrical energy during off-peak hours in the form of thermal energy to meet the peak shaving needs of power plants;

[0018] (2) This system can realize the consumption of clean energy and save energy;

[0019] (3) The steam electric heating boiler participating in boiling heat exchange is designed with turbulent steam pipeline, which can spray turbulent steam to enhance convective heat exchange while blowing away the large steam bubbles formed on the wall of the electric heater, preventing the formation of gas film and avoiding heat transfer deterioration.

[0020] (4) This system can provide industrial steam to meet the steam demand of various industries;

[0021] (5) The functions of each part of the system are controlled by the on / off state of the solenoid valve, which makes it easy to realize automated operation;

[0022] (6) This system operates under high temperature and high pressure conditions, and its energy storage density is much higher than that of general phase change energy storage. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the ultra-high pressure steam boiler system in Example 1;

[0024] Figure 2 This is a front view of the steam turbulence piping in the first electric heating boiler;

[0025] Figure 3 for Figure 2 Top view;

[0026] Figure 4 for Figure 2 A schematic diagram of the three-dimensional structure;

[0027] Figure 5 for Figure 2 A magnified view of a section at point I;

[0028] Figure 6 for Figure 2 Enlarged view of section II in the middle;

[0029] Figure 7 for Figure 4 A magnified view of a section at point III.

[0030] In the diagram: 1 – Ordinary water tank; 2 – Municipal water supply; 3 – First solenoid valve; 4 – First ordinary water pump; 5 – Water treatment equipment; 6 – Purified water tank; 7 – Second solenoid valve; 8 – Purified water; 9 – Third solenoid valve; 10 – First high-pressure pump; 11 – First liquid flow meter; 12 – First trunk flash solenoid valve; 13 – First trunk gas flow meter; 14 – Second high-pressure pump; 15 – First solenoid valve of the turbulence tank; 16 – Insulation layer of the turbulence tank; 17 – Turbulence tank; 18 – Steam-water separator of the turbulence tank; 19 – Electronic level gauge of the turbulence tank; 20 – Local level gauge of the turbulence tank; 21 – Heater of the turbulence tank; 22 – Pressure sensor of the turbulence tank; 23 – First temperature sensor of the turbulence tank; 24 – Second solenoid valve of the turbulence tank; 25 – Safety relief valve of the turbulence tank; 26 – Turbulence tank. 27 – Third solenoid valve of the tank; 28 – Second temperature sensor of the turbulence tank; 29 – Second liquid flow meter; 30 – First gas flow meter of the first electric heating boiler; 31 – First gas flow meter of the second electric heating boiler; 32 – First gas flow meter of the Nth electric heating boiler; 33 – Flash solenoid valve of the first electric heating boiler; 34 – Flash solenoid valve of the second electric heating boiler; 35 – Electronic level gauge of the first electric heating boiler; 36 – First solenoid valve of the first electric heating boiler; 37 – Insulation layer of the first electric heating boiler; 38 – First electric heating boiler; 39 – Pressure sensor of the first electric heating boiler; 40 – Steam-water separator of the first electric heating boiler; 41 – Local level gauge of the first electric heating boiler; 42 – First electric heating pot. 43 – First temperature sensor of the first electric heating boiler; 44 – Second temperature sensor of the first electric heating boiler; 45 – Electric heater of the first electric heating boiler; 46 – Safety pressure relief valve of the first electric heating boiler; 47 – Third solenoid valve of the first electric heating boiler; 48 – Flow meter of the first electric heating boiler; 49 – Second solenoid valve of the first electric heating boiler; 50 – Electronic level gauge of the second electric heating boiler; 51 – First solenoid valve of the second electric heating boiler; 52 – Insulation layer of the second electric heating boiler; 53 – Pressure sensor of the second electric heating boiler; 54 – Steam-water separator of the second electric heating boiler; 55 – Local level gauge of the second electric heating boiler; 56 – First temperature sensor of the second electric heating boiler; 57 – Second temperature sensor of the second electric heating boiler; 58 – [Further details about the second temperature sensor are needed for a complete translation.] – Second electric boiler heater 59 – Second electric boiler safety relief valve 60 – Second electric boiler third solenoid valve 61 – Second electric boiler flow meter 62 – Second electric boiler second solenoid valve 63 – Nth electric boiler electronic level gauge 64 – Nth electric boiler first solenoid valve 65 – Nth electric boiler insulation layer 66 – Nth electric boiler 67 – Nth electric boiler pressure sensor 68 – Nth electric boiler steam-water separator 69 – Nth electric boiler local level gauge 70 – Nth electric boiler first temperature sensor 71 – Nth electric boiler second temperature sensor 72 – Nth electric boiler heater 73 – Nth electric boiler safety relief valve74 – Third solenoid valve of the Nth electric heating boiler; 75 – Flow meter of the Nth electric heating boiler; 76 – Second solenoid valve of the Nth electric heating boiler; 77 – Pressure sensor of the compensating heating tank; 78 – First temperature sensor of the compensating heating tank; 79 – Compensating heater; 80 – Second temperature sensor of the compensating heater; 81 – Insulation layer of the compensating heating tank; 82 – Compensating heating tank; 83 – Second main gas flow meter; 84 – Control terminal; 85 – Recovered water tank; 86 – Fourth solenoid valve; 87 – Turbulence main circuit; 88 – Turbulence U-shaped pipe; 89 – Turbulence flow duct; 90 – Turbulence branch circuit. Detailed Implementation

[0031] 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.

[0032] Example 1:

[0033] The operating parameters for the example are shown in Table 1, the calculation table for high-voltage energy storage properties.

[0034] like Figure 1 As shown, the ultra-high pressure steam boiler system provided by the present invention includes five parts: a water treatment module (A), a steam turbulence module (B), a steam generation module (C), a compensating heating module (D), and a pipeline connection and information transmission module.

[0035] Before starting the entire system, ensure all solenoid valves are closed. Table 1 shows the calculation table for high-pressure energy storage properties. The electric heating boiler operates at a pressure of 4 MPa – 16.5 MPa. The turbulence tank's operating pressure must be higher than that of the electric heating boiler. The steam turbulence tank operates at a pressure of 4.2 MPa – 16.7 MPa, producing industrial steam at 120℃ – 220℃. The turbulence tank uses pressure-controlled heating; the water inside the tank only needs to be heated to saturation. The water volume needs to be calculated based on the tank's volume and the density of saturated water under the target operating conditions. For operational safety, a 3% and 30% space margin is allowed for the turbulence tank and electric heating boiler, respectively.

[0036] Table 1 Calculation Table of High-Pressure Energy Storage Properties

[0037]

[0038] like Figures 1-7As shown, this embodiment provides an ultra-high pressure steam boiler system with a turbulence turbulence module, including: a water treatment module (A), a steam turbulence turbulence module (B), a steam generation module (C), a compensating heating module (D), and a pipeline connection and information transmission module.

[0039] The water treatment module includes a general water tank 1, a water treatment device 5, and a purified water tank 6. The general water tank 1 contains municipal water and is connected to the water treatment device 5 via a first solenoid valve 3, a first general water pump 4, and the other end of the water treatment device 5 is connected to the purified water tank 6. The purified water tank 6 has two outlets and one inlet. The inlet is located at the top of the tank and is connected to the water treatment device. The left outlet is connected to a second solenoid valve 7, and is connected to a steam turbulence module via this solenoid valve, a first liquid flow meter 11, and a second high-pressure pump 14. The right outlet is connected to a third solenoid valve 9, and the water treatment module is connected to a steam generation module via this solenoid valve and a first high-pressure water supply pump 10.

[0040] The steam turbulence module includes a turbulence tank 17 and an insulation layer 16, a turbulence tank heater 21, a turbulence tank steam-water separator 18, a turbulence tank electronic level gauge 19, a turbulence tank pressure sensor 22, a turbulence tank first temperature sensor 23, a turbulence tank second temperature sensor 27, and a turbulence tank local level gauge 20. The turbulence tank contains an electric heater and a steam-water separator. A steam outlet is located at the top of the turbulence tank, connected to the turbulence tank first solenoid valve 15. A local level gauge is connected to the left side of the turbulence tank, and the right side of the turbulence tank, from top to bottom, is connected to the turbulence tank electronic level gauge, pressure sensor, and the first and second temperature sensors. Furthermore, all temperature sensors, pressure sensors, and the electronic level gauge transmit signals to the control terminal. The electronic level gauge monitors the liquid level inside the tank; the pressure gauge monitors the pressure inside the tank; the first temperature sensor monitors the temperature inside the tank; the second temperature sensor monitors the external temperature of the insulation layer to verify the insulation effect; and the local level gauge provides a direct view of the liquid level inside the tank.

[0041] The steam generating module contains N groups of electric heating units, all of which are connected in parallel. Each electric heating unit consists of an electric heating boiler and its supporting equipment. The connection method of the electric heating boiler and supporting equipment in each unit is the same. The structure of the first electric heating boiler is described below as an example: The first electric heating boiler 38 contains an electric heater 44, a steam turbulence pipeline, and a steam-water separator 40. The boiler body is covered with an insulation layer 37. On the left side of the boiler body, from top to bottom, are the electronic level gauge 35, pressure sensor 39, first temperature sensor 42, and second temperature sensor 43 connected together. The right side of the boiler body is connected to the local level gauge 41. The first electric heating boiler has a steam outlet at the top of its furnace body, which is connected to the first solenoid valve 36. Steam enters the electrically compensated heating module through a steam channel formed by this solenoid valve, the first electric heating boiler flash solenoid valve 32, and the first electric heating boiler gas flow meter 29. The steam discharge channel of the first electric heating boiler consists of this solenoid valve, the first electric heating boiler gas flow meter, and the connected steam channel. At the bottom of the first electric heating boiler, from left to right, are the water inlet, pressure relief port, and drain outlet. The water inlet is connected to the first electric heating boiler flow meter 47. Purified water enters the electric heating boiler via a high-pressure pump, the first electric heating boiler second solenoid valve 48, and this flow meter. The pressure relief port is controlled by a safety pressure relief valve. When overpressure occurs inside the furnace during heating, some water in the tank can be discharged through the first electric heating boiler safety pressure relief valve 45 to achieve pressure reduction. The drain outlet is connected to the first electric heating boiler third solenoid valve 46, through which water in the heating tank is discharged. Furthermore, the electric heaters are arranged in three layers inside the furnace, with heaters on the same layer interleaved and spaced approximately 1.5 m apart. The spacing between layers is determined by the size of the furnace. All temperature sensors, pressure sensors, and electronic level gauges transmit signals to the control terminal. The first electronic level gauge monitors the liquid level inside the tank; the first pressure sensor monitors the pressure inside the tank; the first temperature sensor monitors the temperature inside the furnace; and the second temperature sensor monitors the external temperature of the insulation layer to verify the insulation effect. The local level gauge provides a direct view of the liquid level inside the tank.

[0042] The compensating heating module includes a compensating heating tank 82, a compensating heating tank insulation layer 81, a compensating heater 79, first and second temperature sensors 78 and 80 of the compensating heating tank, and a compensating heating tank pressure sensor 77. The compensating heating tank contains a compensating heater, and the outside of the tank is wrapped with an insulation layer. The left side wall is connected to the first and second temperature sensors and the pressure sensor. The bottom of the compensating heating tank 82 is connected to a second main gas flow meter 83. Furthermore, all temperature and pressure sensors transmit signals to the control terminal. The pressure sensor monitors the pressure inside the tank, the first temperature sensor monitors the temperature inside the tank, and the second temperature sensor monitors the external temperature of the insulation layer and verifies the insulation effect.

[0043] The pipeline connection and information transmission module serves as the connection and control module for the entire thermal storage boiler system. This module includes water channels, steam channels, signal channels, ordinary water pumps, high-pressure pumps, solenoid valves, flash solenoid valves, liquid flow meters, gas flow meters, and safety relief valves. The entire system is insulated. The ordinary water pumps are located between the ordinary water tank and the water treatment equipment. The high-pressure pumps are all high-pressure boiler feed pumps, located between the water treatment module and the steam generation module and steam turbulence module, respectively. There are numerous solenoid valves, safety relief valves, flash solenoid valves, and flow meters; their distribution will be described in detail later. Valves, flow meters, and pumps are connected to the water and steam channels via flanges. The water and steam channels are used to transport water and steam. The signal channel ensures the connection of pressure and temperature sensors, level gauges, pumps, electric heating devices, and solenoid valves in each module to the computer terminal. The computer terminal receives data signals and controls the opening and closing of solenoid valves, and the start and stop of pumps and electric heating devices via this channel, maintaining the normal operation of the entire system.

[0044] Furthermore, taking the steam channel in the first electric heating furnace as an example, the channel includes a steam turbulence branch, which consists of four parts: a turbulence main channel 87, a turbulence branch channel 90, a turbulence conduit 89, and a turbulence U-shaped pipe 88. The turbulence branch is distributed intersectingly between the electric heaters. Specifically, the turbulence branch in each electric heating furnace is divided into three layers, all on the same horizontal plane as the electric heater. The turbulence U-shaped pipe of the turbulence branch surrounds the electric heater. The turbulence branch is distributed intersectingly with the electric heater at a certain interval (0.3~0.5 m) on the same horizontal plane.

[0045] The main turbulence path has an inner diameter of 85 mm–95 mm and a wall thickness of 5 mm–10 mm. Its length within an electric boiler is 3 m–8 m. There are 3–6 turbulence branches evenly distributed perpendicular to the main turbulence path. These branches are connected to the main turbulence path and located within the electric boiler of the steam generation module. The turbulence branches are distributed around the electric heater. Turbulence U-shaped pipes are connected to the branches via turbulence transfer guides. Turbulence transfer guides are located at the upper, lower, or middle ends of the branches, with a curvature ranging from 0.8 to 1 to reduce friction loss. The inner diameters of the branches, U-shaped pipes, and transfer guides are all 30 mm–50 mm, with a wall thickness of 5 mm–10 mm. The U-shaped pipe surrounds the electric heater and has turbulence steam injection holes with a diameter of 2 mm–4 mm, distributed in both horizontal and upward angles of 30°–60°. After the purified water inside the furnace is heated to boiling, the high heat flux density of the electric heater causes a large steam film to form on its surface, enveloping the water. Heat can only be transferred to the water through the steam, significantly reducing heat transfer efficiency and causing heat transfer deterioration, which can even lead to heater burnout in severe cases. To avoid this, this invention incorporates a steam turbulence diversion channel. High-pressure steam generated by the steam turbulence diversion tank is injected through the steam turbulence diversion channel in the steam channel, forming turbulence that disperses the gas film enveloping the electric heater, thereby enhancing heat transfer and preventing heat transfer deterioration.

[0046] This embodiment provides a control method for the above-mentioned turbulence-type ultra-high pressure steam boiler system, including the following:

[0047] (1) Open the first solenoid valve 3 and the first ordinary water pump 4. The municipal water in the ordinary water tank 1 enters the water treatment equipment 5 through the first solenoid valve 3 and the first ordinary water pump 4. After the water is purified to meet the requirements of the boiler, it is sent to the purified water tank 6 for standby. After the purified water tank 6 is replenished, close the first solenoid valve 3 and the first ordinary water pump 4. Open the second solenoid valve 7, the second solenoid valve 24 of the turbulence tank and the first high-pressure water pump 10 to replenish water to the turbulence tank 17 and all electric heating boilers. According to the flow meter monitoring, when the water volume in each boiler reaches the full load mass of the corresponding working condition, close the above solenoid valves and stop the first high-pressure water pump 10.

[0048] (2) When the water in the turbulence tank 17 is heated, if an overpressure occurs, some water will be discharged into the recovery water tank 85 through the safety relief valve (corresponding to 45 – the first electric heating boiler safety relief valve, 59 – the second electric heating boiler safety relief valve, and 73 – the Nth electric heating boiler safety relief valve in the figure), so that the turbulence tank is maintained within the safe pressure range. When the target pressure is reached (the target pressure of the turbulence tank must be greater than that of the electric heating boiler), heating will stop.

[0049] (3) Open the third solenoid valve 9, the first solenoid valve 15 of the turbulence tank, the first main line flash evaporation solenoid valve 12, the first high-pressure pump 10, and the third solenoid valves of the first to Nth electric heating boilers to add water to the electric heating boilers. At the same time, control the main line flash evaporation solenoid valve to add a small amount of steam through the steam turbulence pipeline to maintain the steam pressure and the water pressure in the furnace in balance, and prevent water in the electric heating boiler from seeping into the turbulence pipeline. When the water is added to the target liquid level, start heating and heat the water to the boiling state under the target pressure. During the heating process, adjust the first main line flash evaporation solenoid valve 12 so that the turbulent steam is injected into the electric heating boiler through the turbulence pipeline, which enhances the convective heat transfer and blows away the large steam bubbles formed on the wall of the electric heater, preventing the formation of a gas film and avoiding the deterioration of heat transfer. In the event of overpressure, some water will be discharged into the recovery water tank through the safety relief valve, keeping the electric heating boiler within a safe pressure range. Once boiling is achieved, the first and second solenoid valves and flash solenoid valves of all electric heating boilers will be opened (32 – first electric heating boiler flash solenoid valve, 33 – second electric heating boiler flash solenoid valve, 34 – Nth electric heating boiler flash solenoid valve). After passing through the steam-water separator, the steam enters the compensation heating module through the steam channel, where the heat lost along the way is compensated and heated to become industrial steam. At the same time, the same mass of purified water is added according to the steam generation to maintain the liquid level balance in the tank.

[0050] (4) When shutting down the system, first stop heating, and then close all valves.

[0051] (5) When draining water, open the third solenoid valve 26, the fourth solenoid valve 86, and the third solenoid valve of the electric heating boiler (corresponding to 46 – the third solenoid valve of the first electric heating boiler, 60 – the third solenoid valve of the second electric heating boiler, and 74 – the third solenoid valve of the Nth electric heating boiler in the figure) to drain all the water in the tank into the recovery water tank, and then drain the water through the fourth solenoid valve 86.

[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 turbulence-type ultra-high pressure thermal storage steam electric boiler system, characterized in that... include: Water treatment module (A), steam turbulence module (B), steam generation module (C), compensating heating module (D), pipeline connection and information transmission module; 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 steam turbulence module is used to generate high-temperature, high-pressure turbulent steam and deliver it to the steam generating module; the steam turbulence module includes a turbulence tank and insulation layer, a turbulence tank electric heater, a turbulence tank steam-water separator, a turbulence tank electronic level gauge, a turbulence tank pressure sensor, a turbulence tank first and second temperature sensors, and a turbulence tank local level gauge. The steam generation module heats purified water to high-temperature, high-pressure water for the target operating conditions and generates steam through a flash solenoid valve. The steam generation module contains N sets of electric heating units, all connected in parallel. Each electric heating unit consists of an electric boiler and its auxiliary equipment, with the connection method of the electric boiler and auxiliary equipment in each unit being consistent. The steam channel in the electric boiler includes a steam turbulence branch. High-pressure steam generated by the steam turbulence tank passes through the steam turbulence branch in the steam channel and is injected from the turbulence steam injection holes of the turbulence U-shaped tube to form turbulence, dispersing the gas film wrapped around the electric heater. The steam turbulence branch consists of four parts: a turbulence main path, turbulence branches, turbulence conduits, and turbulence U-shaped tubes, which are intersected between the electric heaters. Specifically, the turbulence branch in each electric furnace is divided into three layers, all on the same horizontal plane as the electric heater, with the turbulence U-shaped tubes of the turbulence branch surrounding the electric heater. The turbulence branches are intersected with the electric heater at intervals of 0.3~0.5 m on the same horizontal plane. The compensation heating module is used to compensate for the heat loss of steam during transportation and heat it to become the required industrial steam. The compensation heating module includes a compensation heating tank, a compensation heating tank insulation layer, a compensation heater, and first and second temperature sensors and a pressure sensor for the compensation heating tank. The pipeline connection and information transmission module is the connection and control module for the entire thermal storage boiler system. The module includes a water channel, a steam channel, a signal channel, a regular water pump, a high-pressure pump, a solenoid valve, a flash solenoid valve, a liquid flow meter, a gas flow meter, and a safety pressure relief valve. The entire system is equipped with an insulation layer. The pipeline connection and information transmission module is used to transmit water and steam, enabling the entire system to operate stably.

2. The turbulence-type ultra-high pressure thermal storage steam electric boiler system according to claim 1, characterized in that: The ordinary water tank contains municipal water. This water tank is connected to the water treatment equipment via a first solenoid valve and a first ordinary water pump. The other end of the water treatment equipment is connected to a purified water tank. The purified water tank has two outlets and one inlet. The inlet is located at the top of the tank and is connected to the water treatment equipment. The left outlet is connected to the second solenoid valve, and through this solenoid valve, the first liquid flow meter, and the second high-pressure pump, it is connected to the steam turbulence module. The right outlet is connected to the third solenoid valve, and the water treatment module is connected to the steam generation module through this solenoid valve and the first high-pressure water pump.

3. The turbulence-type ultra-high pressure thermal storage steam electric boiler system according to claim 1, characterized in that: The turbulence tank contains an electric heater and a steam-water separator. A steam outlet is located at the top of the turbulence tank, connected to the first solenoid valve. A local level gauge is connected to the left side of the turbulence tank, while the right side, from top to bottom, is connected to an electronic level gauge, a pressure sensor, and first and second temperature sensors. All temperature sensors, pressure sensors, and the electronic level gauge transmit signals to the control terminal. The electronic level gauge monitors the liquid level inside the tank; the pressure gauge monitors the pressure inside the tank; the first temperature sensor monitors the temperature inside the tank; and the second temperature sensor monitors the external temperature of the insulation layer to verify the insulation effect. The local level gauge provides a direct view of the liquid level inside the tank.

4. The turbulence-type ultra-high pressure thermal storage steam electric boiler system according to claim 1, characterized in that: Each electric heating unit includes an electric heating boiler, which contains an electric heater, steam turbulence piping, and a steam-water separator. The boiler body is externally covered with an insulation layer. From top to bottom, the left side of the boiler body is equipped with an electronic level gauge, a pressure sensor, a first temperature sensor, and a second temperature sensor. The right side of the boiler body is connected to a local level gauge. A steam outlet is located at the top of the boiler body, connected to a first solenoid valve. Steam enters the electrically compensated heating module through a steam channel formed by this solenoid valve, a first flash solenoid valve, and a first gas flow meter. The discharge passage consists of this solenoid valve, the first electric heating boiler gas flow meter, and the steam passage connected to it; the bottom of the electric heating boiler body is provided with a water inlet, a pressure relief port, and a drain port from left to right. The water inlet is connected to the first liquid flow meter, and purified water enters the electric heating boiler through the second solenoid valve and the first liquid flow meter by a high-pressure pump; the pressure relief port is controlled by a safety pressure relief valve. When overpressure occurs in the furnace body during heating, some water in the furnace can be discharged through the first pressure relief valve to achieve a pressure reduction effect; the drain port is connected to the third solenoid valve, and water in the heating furnace is discharged through the third solenoid valve. All temperature sensors, pressure sensors, and electronic level gauges transmit signals to the control terminal. The electronic level gauge is used to monitor the liquid level inside the furnace; the pressure sensor is used to monitor the pressure inside the furnace; the first temperature sensor is used to monitor the temperature inside the furnace; the second temperature sensor is used to monitor the external temperature of the insulation layer and to check the insulation effect; and the local level gauge can provide a direct view of the liquid level inside the furnace.

5. The turbulence-type ultra-high pressure thermal storage steam boiler system according to claim 4, characterized in that: The turbulence branch is connected to the turbulence main and is located in the electric heating boiler of the steam generation module. The turbulence branch is distributed around the electric heater. The turbulence U-shaped pipe is connected to the turbulence branch through the turbulence flow guide pipe. The turbulence flow guide pipe is provided at the upper end, lower end or middle part of the turbulence branch. The curvature of the turbulence flow guide pipe is in the range of 0.8~1 to reduce friction loss.

6. The turbulence-type ultra-high pressure thermal storage steam boiler system according to claim 5, characterized in that: The inner diameter of the main turbulence path is 85 mm–95 mm, the wall thickness is 5 mm–10 mm, and the length is 3 m–8 m. There are 3–6 turbulence branches evenly distributed in the direction perpendicular to the main turbulence path. The inner diameter of the turbulence branches, turbulence U-shaped pipes, and turbulence flow guide pipes is 30 mm–50 mm, and the wall thickness is 5 mm–10 mm. The turbulence U-shaped pipe surrounds the electric heater. The turbulence U-shaped pipe has turbulence steam injection holes with a diameter of 2 mm–4 mm, which are divided into two directions: horizontal and obliquely upward, with an included angle of 30°–60°.

7. The turbulence-type ultra-high pressure thermal storage steam electric boiler system according to claim 1, characterized in that: The compensating heating tank is equipped with a compensating heater inside, and the outside of the tank is wrapped with a heat insulation layer. The left side wall is connected to the first and second temperature sensors and the pressure sensor. The bottom of the compensating heating tank is connected to the second main gas flow meter. All temperature sensors and pressure sensors transmit signals to the control terminal. The pressure sensor is used to monitor the pressure inside the tank, the first temperature sensor is used to monitor the temperature inside the tank, and the second temperature sensor is used to monitor the temperature outside the heat insulation layer and check the heat insulation effect.

8. The turbulence-type ultra-high pressure thermal storage steam electric boiler system according to claim 1, characterized in that: In the pipeline connection and information transmission module, ordinary water pumps are located between the ordinary water tank and the water treatment equipment; high-pressure pumps are all high-pressure boiler feed pumps, located between the water treatment module, the steam generation module, and the steam turbulence module; valves, flow meters, and pumps are connected to the water channel and steam channel via flanges; the water channel and steam channel are used to transport water and steam, and the signal channel ensures the connection between the pressure and temperature sensors, level gauges, pumps, electric heating devices, and solenoid valves in each module and the computer terminal. The computer terminal obtains data signals and controls the opening and closing of the solenoid valves, and the start and stop of the pumps and electric heating devices through this channel to maintain the normal operation of the entire system.

9. A control method for a turbulence-type ultra-high pressure thermal storage steam electric boiler system according to any one of claims 1 to 8, characterized in that... Includes the following: (1) Open the first solenoid valve and the first ordinary water pump. The municipal water in the ordinary water tank enters the water treatment equipment through the first solenoid valve and the first ordinary water pump. After the water is purified to meet the requirements of the boiler, it is sent to the purified water tank for standby. After the purified water tank is replenished, close the first solenoid valve and the first ordinary water pump. Open the second solenoid valve, the second solenoid valve of the turbulence tank and the first high-pressure water pump to replenish water to the turbulence tank and all electric heating boilers. According to the flow meter, when the water volume in each boiler reaches the full load mass of the corresponding working condition, close the above solenoid valve and stop the first high-pressure water pump. (2) When the water in the turbulence tank is heated, if an overpressure occurs, some water will be discharged into the recovery water tank through the safety relief valve, so that the turbulence tank is maintained within the safe pressure range and heating is stopped when the target pressure is reached. (3) Open the third solenoid valve, the first solenoid valve of the turbulence tank, the first main circuit flash evaporation solenoid valve, the first high-pressure feed water pump, and the third solenoid valves of the first to Nth electric heating boilers. The first main circuit flash evaporation solenoid valve is located on the connecting pipe between the steam turbulence module (B) and the steam generation module (C) to replenish water into the electric heating boiler. At the same time, control the main circuit flash evaporation solenoid valve to replenish a small amount of steam through the steam turbulence pipeline to maintain the steam pressure and the water pressure in the furnace in balance, and prevent water in the electric heating boiler from seeping into the turbulence pipeline. When the water reaches the target liquid level, start heating to heat the water to the boiling state under the target pressure. During the heating process, adjust the first main circuit flash evaporation solenoid valve to make the turbulence... Steam is injected into the electric heating boiler through the turbulence pipe, which enhances convective heat transfer and disperses the large steam bubbles formed on the wall of the electric heater, preventing the formation of a gas film and avoiding heat transfer deterioration. In case of overpressure, some water will be discharged into the recovery water tank through the safety relief valve, so that the electric heating boiler is maintained within the safe pressure range. After reaching the boiling state, the first and second solenoid valves and the flash solenoid valve of all electric heating boilers are opened. After passing through the steam-water separator, the steam enters the compensation heating module through the steam channel, which compensates for the heat lost along the way and heats it into industrial steam. At the same time, the same mass of purified water is added according to the amount of steam generated to maintain the liquid level balance in the tank. (4) When shutting down the system, first stop heating, then close all valves; (5) When draining water, open the third and fourth solenoid valves of the turbulence tank and the third solenoid valve of the electric heating boiler to drain all the water in the tank into the recovery water tank, and then drain the water through the fourth solenoid valve.

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