Solid Electric Heat Storage Superheated Steam Output System

Abstract

A solid electric heat storage superheated steam output system, which includes: a solid electric heat storage unit, a superheated steam heat exchanger, a saturated steam heat exchanger, a water preheating heat exchanger, a steam drum, a variable frequency fan, a wind passage, a preheated steam tank, a superheated steam unit, and a deaerator. Heat exchange is carried out through a high-temperature wind passage with the superheated steam heat exchanger, the saturated steam heat exchanger, and the water preheating heat exchanger under the power of the variable frequency fan to finally generate superheated steam for heating users; the water preheating heat exchanger is connected to a preheated steam tank, and the heat energy after heat exchange by the superheated steam heat exchanger and the saturated steam heat exchanger is used to generate low-temperature steam to supply the deaerator for thermal deaeration. At the same time, water also flows into the deaerator water tank through an overflow pipe; the superheated steam unit is a structural combination centered around a steam drum, including multiple groups of superheated steam heat exchangers, saturated steam heat exchangers, water preheating heat exchangers and corresponding accessories. The overall superheated steam combination system is composed of multiple superheated steam units.

Description

Technical Field

[0001] The present invention relates to the technical field of electrothermal energy storage, and specifically to a solid electrothermal energy storage superheated steam output system that uses high-voltage and high-power solid electrothermal energy storage as a heat source and completes heat energy output to users through the heat release combination structure of multiple superheated steam units. Background Art

[0002] Currently, boilers fueled by natural gas or coal are generally used in industrial parks to produce low-pressure or medium-pressure superheated steam with a temperature of 200°C to 500°C to meet the needs of the production process. With the increase in the prices of natural gas and coal, the price per ton of superheated steam has been rising continuously, greatly increasing the production cost and also increasing the carbon emissions and environmental protection pressure. If the clean electric energy that cannot be fully utilized, such as abandoned wind power and abandoned photovoltaic power, is supplied to a high-voltage and high-power solid electrothermal energy storage furnace through the power transmission and distribution power sources with voltage levels of 110 kV to 10 kV by power grid dispatching, while improving the utilization rate of clean electric energy, the cost of producing superheated steam can also be greatly reduced; the high-voltage and high-power solid electrothermal energy storage furnace uses cheap valley electricity or electric energy such as abandoned wind power and abandoned photovoltaic power as energy sources, and can completely replace coal-fired, gas-fired and other boilers to supply heat to users. After the applicant applied for a patent named "Solid Heat Storage System with Superheated Steam Heat Exchange Device" in October 2018 (patent application number: 201821709649.0), dozens of solid electrothermal energy storage steam furnaces have been produced and delivered using this technology, providing users with equipment that can produce stable steam and also providing a load for the power grid to absorb abandoned wind power and abandoned photovoltaic power. The inventor summarized the experience of equipment production and manufacturing in the past four years and analyzed and compared the operation data obtained from users. It was found that although the efficiency of the circulating fan was improved by placing the superheated steam heat exchanger, saturated steam heat exchanger and preheated steam heat exchanger in the same fan heat exchange channel, there were also defects that the working pressure and superheat temperature value of the steam could not be adjusted separately, and it was not suitable for users with higher requirements for superheated steam parameters; the flow rate of low-temperature water in the preheated steam heat exchanger was controlled by a makeup water pump. During the period when the steam drum did not require makeup water, the water in the preheated steam heat exchanger stopped flowing, and sometimes vaporization occurred; the prior art did not consider the heat supply problem of the feed water deaerator. If users purchased a thermal deaerator externally, it was necessary to consume main steam to supply heat to the deaerator, reducing the output capacity of the superheated steam of the equipment and wasting high-quality steam. Summary of the Invention

[0003] In view of the above problems, the present invention provides a solid electrothermal energy storage superheated steam output system that uses high-voltage and high-power solid electrothermal energy storage units as heat sources and is formed by combining multiple superheated steam units.

[0004] The technical solution adopted by the present invention is as follows: A solid electric heat storage superheated steam output system, which is composed of one, two or more superheated steam units connected to a deaerator, a main water supply pump, a main water supply source, and a preheating makeup water pump through pipelines; the superheated steam unit is composed of one, two or more heat storage and release units, a steam drum, a water level gauge, an evaporation makeup water pump and the corresponding pipelines; the heat storage and release unit is composed of a solid electric heat storage unit, a superheated steam heat exchanger, a saturated steam heat exchanger, a water preheating heat exchanger, a variable-frequency fan, an upper variable-frequency fan, a return air duct, an upper return air duct, a high-temperature air channel, an upper high-temperature air channel, a preheated steam tank and the corresponding pipelines; the solid electric heat storage unit is composed of a solid energy storage body, a heat insulation layer, a high-voltage insulating support, a high-temperature air area, and a low-temperature air area; characterized in that: the solid electric heat storage unit is connected into a loop through a high-temperature air channel, a saturated steam heat exchanger, a water preheating heat exchanger, a variable-frequency fan, and a return air duct, and at the same time is connected into a loop through an upper high-temperature air channel, a superheated steam heat exchanger, a water preheating heat exchanger, an upper variable-frequency fan, and an upper return air duct; the superheated steam heat exchanger is connected to the superheated steam output flange A interface through a superheated steam pipeline branch and a superheated steam pipeline, and at the same time is connected to the steam drum through a saturated steam pipeline branch and a saturated steam pipeline; the saturated steam heat exchanger is connected to the steam drum through an evaporation pipeline branch, an evaporation pipeline, a condensation down pipeline branch, and a condensation down pipeline, and at the same time is connected to the evaporation makeup water pipeline flange A interface through an evaporation makeup water pipeline branch, an evaporation makeup water pipeline, and an evaporation makeup water pump; the water preheating heat exchanger is connected to the preheated steam tank, and at the same time is connected to the preheating makeup water pipeline flange A interface through a preheating makeup water pipeline branch and a preheating makeup water pipeline; the preheated steam tank is connected to the preheated steam output flange A interface through a preheated steam pipeline branch and a preheated steam pipeline, and at the same time is connected to the overflow pipeline flange A interface through an overflow pipeline branch and an overflow pipeline; the superheated steam unit is connected to a heat user through a superheated steam output flange A interface, a superheated steam output main pipeline, and a superheated steam output flange B interface, is connected to the deaerator through a preheated steam output flange A interface, a preheated steam output main pipeline, and a preheated steam output flange B interface, is connected to the deaerator water tank through an overflow pipeline flange A interface, an overflow main pipeline, and an overflow pipeline flange B interface, is connected to the deaerator water tank through a preheating makeup water pipeline flange A interface, a preheating makeup water main pipeline, a preheating makeup water pump, and a preheating makeup water pipeline flange B interface, and is connected to the deaerator water tank through an evaporation makeup water pipeline flange A interface, an evaporation makeup water main pipeline, and an evaporation makeup water pipeline flange B interface; the deaerator is connected to the main water supply source through a main water supply flange interface and a main water supply pump.

[0005] The present invention includes: The superheated steam unit is a structural combination with a steam drum as the core, including one or more heat storage and release units and their corresponding accessories.

[0006] The present invention has the following advantages and effects: The technical solution provided by the present invention abandons the structure in which the superheated steam heat exchanger, saturated steam heat exchanger, and water preheating heat exchanger in the above patent technical solution are all connected in series in the air duct, and at the same time, the outlet of the water preheating heat exchanger is connected to the saturated steam heat exchanger. Since the three heat exchangers in the technical solution with the application number 201821709649.0 are all connected in series in the same circulating air duct and the air volume is controlled by the same frequency conversion fan, and the heat requirements of the superheated steam heat exchanger and the saturated steam heat exchanger are not completely synchronized, the system cannot take into account the heat exchange conditions of the two heat exchangers simultaneously during operation. At the same time, this structure is extremely likely to cause vaporization of the water preheating heat exchanger, affecting the operation effect. In the structure of the present invention, the superheated steam heat exchanger and the saturated steam heat exchanger are placed in parallel and are respectively connected to the high-temperature air channels, and the circulating air flow is controlled by their respective frequency conversion fans to adapt to the corresponding heat demand, and the heat used by each other no longer conflicts, making the system operate stably and the steam parameters stable, meeting the user's needs; the water preheating heat exchanger is arranged in the high-temperature air channels of the superheated steam heat exchanger and the saturated steam heat exchanger to cool the two high-temperature hot air channels again, increasing the cooling gradient of the circulating air, improving the heat release efficiency of the circulating air and reducing the working temperature of the fan blades; the outlet of the water preheating heat exchanger is no longer connected to the saturated steam heat exchanger, but is connected to a preheated steam tank, and the heat energy after heat exchange of the superheated steam heat exchanger and the saturated steam heat exchanger is used to generate low-temperature steam to supply the deaerator for thermal deaeration, and at the same time, the water flows into the deaerator water tank through the overflow pipe; when the system is not working, even if there is heat radiation, since the preheating makeup water pump is always working, the water preheating heat exchanger will absorb heat for heat exchange without vaporization and will not cause the frequency conversion fan to overheat and be damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 is a schematic diagram showing the composition of a single superheated steam unit of the present invention;

[0008] Figure 2 is a schematic diagram of the combined system of the superheated steam units of the present invention;

[0009] Figure 3 is a schematic diagram showing the structure of the solid electric heat storage unit of the present invention.

[0010] Description of the main components in the figure: 1. Solid energy storage body; 2. Thermal insulation layer; 3. Superheated steam heat exchanger; 4. Saturated steam heat exchanger; 5. Water preheating heat exchanger; 6. Steam drum (saturated steam tank); 9. Variable-frequency fan; 9-1. Upper variable-frequency fan; 10. Return air duct; 10-1. Upper return air duct; 14. Superheated steam pipeline; 14-1. Superheated steam pipeline branch; 16. Heat user; 17. Array of hot air holes; 19. Saturated steam pipeline; 19-1. Saturated steam pipeline branch; 20. Solid electric heat storage unit; 20-1. Electric heating wire; 20-2. High-voltage insulating pillar; 20-3. High-temperature air zone; 20-4. Low-temperature air zone; 20-5. High-voltage electric connection electrode; 21. High-temperature air channel; 21-1. Upper high-temperature air channel; 22. Evaporation pipeline; 22-1. Evaporation pipeline branch; 23. Condensation downcomer; 23-1. Condensation downcomer branch; 24. Preheated steam tank; 25. Preheated steam pipeline; 25-1. Preheated steam pipeline branch; 26. Overflow pipeline; 26-1. Overflow pipeline branch; 27. Controller; 28. Water level gauge; 29. Evaporation make-up water pump; 30. Superheated steam unit; 30-1. Heat storage and release unit; 31. Main superheated steam output pipeline; 31-1. Superheated steam output flange A interface; 31-2. Superheated steam output flange B interface; 32. Main preheated steam output pipeline; 32-1. Preheated steam output flange A interface; 32-2. Preheated steam output flange B interface; 33. Main overflow pipeline; 33-1. Overflow pipeline flange A interface; 33-2. Overflow pipeline flange B interface; 34. Main preheated water make-up pipeline; 34-1. Preheated water make-up pipeline flange A interface; 34-2. Preheated water make-up pipeline flange B interface; 34-3. Preheated water make-up pipeline; 34-4. Preheated water make-up pipeline branch; 35. Main evaporation make-up water pipeline; 35-1. Evaporation make-up water pipeline flange A interface; 35-2. Evaporation make-up water pipeline flange B interface; 35-3. Evaporation make-up water pipeline; 35-4. Evaporation make-up water pipeline branch; 36. Preheated water make-up pump; 37. Deaerator; 38. Deaerator exhaust valve; 39. Deaerator water tank; 40. Main water supply flange interface; 41. Main water supply pump; 42. Main water supply source.

[0011] This attached drawing is only a schematic diagram of an embodiment of the present invention. For those of ordinary skill in the art, other attached drawings can be obtained based on this set of attached drawings without creative work. Detailed implementation manners

[0012] The following will describe in detail the specific implementation manners of the present invention with reference to the attached drawings. The following description is only for demonstration and explanation, and does not impose any formal restrictions on the present invention.

[0013] As Figures 1-3As shown in the figure, this embodiment is a solid heat storage superheated steam output system formed by combining one, two or more superheated steam units with a solid electric heat storage unit using high voltage and high power as the heat source. It includes: a solid electric heat storage unit 20, a superheated steam heat exchanger 3, a saturated steam heat exchanger 4, a water preheating heat exchanger 5, a steam drum (saturated steam tank) 6, a variable frequency fan 9, an upper variable frequency fan 9-1, a return air duct 10, an upper return air duct 10-1, a heat user 16, a high-temperature air duct 21, an upper high-temperature air duct 21-1, a preheated steam tank 24, a controller 27, a water level gauge 28, an evaporation makeup water pump 29, a superheated steam unit 30, a heat storage and release unit 30-1, a preheating makeup water pump 36, a deaerator 37, a deaerator water tank 39, a main water supply flange interface 40, a main water supply pump 41, a main water supply source 42, various pipes and flanges.The solid electric heat storage unit 20 is connected into a loop through the high-temperature air duct 21, the saturated steam heat exchanger 4, the water preheating heat exchanger 5, the variable-frequency fan 9, and the return air duct 10. At the same time, it is connected into a loop through the upper high-temperature air duct 21-1, the superheated steam heat exchanger 3, the water preheating heat exchanger 5, the upper variable-frequency fan 9-1, and the upper return air duct 10-1. Inside the solid electric heat storage unit 20, the return air duct 10 and the upper return air duct 10-1 are connected to the low-temperature air area 20-4, and then connected to the high-temperature air area 20-3 through the array of hot air holes 17 and then to the high-temperature air duct 21 and the upper high-temperature air duct 21-1; the superheated steam heat exchanger 3 is connected to the superheated steam output flange A interface 31-1 through the superheated steam pipeline branch 14-1 and the superheated steam pipeline 14, and at the same time is connected to the steam drum 6 through the saturated steam pipeline branch 19-1 and the saturated steam pipeline 19; the saturated steam heat exchanger 4 is connected to the steam tank 6 through the evaporation pipeline branch 22-1, the evaporation pipeline 22, the condensation down pipeline branch 23-1, and the condensation down pipeline 23, and at the same time is connected to the evaporation make-up water pipeline flange A interface 35-1 through the evaporation make-up water pipeline branch 35-4, the evaporation make-up water pipeline 35-3, and the evaporation make-up water pump 29; the water preheating heat exchanger 5 is connected to the preheated steam tank 24, and at the same time is connected to the preheated water make-up pipeline flange A interface 34-1 through the preheated water make-up pipeline branch 34-4 and the preheated water make-up pipeline 34-3; the preheated steam tank 24 is connected to the preheated steam output flange A interface 32-1 through the preheated steam pipeline branch 25-1 and the preheated steam pipeline 25, and at the same time is connected to the overflow pipeline flange A interface 33-1 through the overflow pipeline branch 26-1 and the overflow pipeline 26; the superheated steam unit 30 is connected to the heat user 16 through the superheated steam output flange A interface 31-1, the superheated steam output main pipeline 31, and the superheated steam output flange B interface 31-2, connected to the deaerator 37 through the preheated steam output flange A interface 32-1, the preheated steam output main pipeline 32, and the preheated steam output flange B interface 32-2, connected to the deaerator water tank 39 through the overflow pipeline flange A interface 33-1, the overflow main pipeline 33, and the overflow pipeline flange B interface 33-2, connected to the deaerator water tank 39 through the preheated water make-up pipeline flange A interface 34-1, the preheated water make-up main pipeline 34, the preheated water make-up pump 36, and the preheated water make-up pipeline flange B interface 34-2, connected to the deaerator water tank 39 through the evaporation make-up water pipeline flange A interface 35-1, the evaporation make-up water main pipeline 35, and the evaporation make-up water pipeline flange B interface 35-2; the deaerator 37 is connected to the main water supply source 42 through the main water supply flange interface 40 and the main water supply pump 41.

[0014] Selection of solid electric heat storage superheated steam output system: The system is mainly composed of one, two or more superheated steam unit 30 structures. Among them, the superheated steam unit 30 is composed of a single steam drum 6 and multiple heat storage and release units 30-1. The heat storage and release unit 30-1 is composed of a solid electric heat storage unit 20, a superheated steam heat exchanger 3, a saturated steam heat exchanger 4, a water preheating heat exchanger 5, a variable frequency fan 9, an upper variable frequency fan 9-1, etc.; The use of unit bodies makes the device composition have the advantages of more flexible layout and more convenient maintenance. The mass ratio relationship and quantity ratio relationship of the heat storage and release unit 30-1 can be configured according to the user's requirements for steam parameters and heat storage capacity, that is, the modular correspondence relationship between the solid electric heat storage unit 20 and the superheated steam heat exchanger 3, the saturated steam heat exchanger 4, the water preheating heat exchanger 5, the variable frequency fan 9, and the upper variable frequency fan 9-1 forms the superheated steam unit 30. Finally, the superheated steam unit 30 is flexibly arranged according to the user's site to form a complete solid electric heat storage superheated steam output system. The present invention mainly solves problems such as the stability of the output steam parameters, the deaeration of the feed water, the prevention of vaporization in the preheater, the cooling of the terminal variable frequency fan 9 and the upper variable frequency fan 9-1, and the flexible layout of the unit body structure technical solution.

[0015] Steam stable output process: Through the device controller 27, deaerated water is supplied to each superheated steam unit 30. The deaerated water enters through the flange A interface 35-1 of the evaporation make-up water pipeline, and after being pressurized by the evaporation make-up water pump 29, it is evenly distributed to each heat storage and release unit 30-1 through the evaporation make-up water pipeline 35-3. Each heat storage and release unit 30-1 enters the saturated steam heat exchanger 4 through the evaporation make-up water pipeline branch 35-4. Start the variable-frequency fan 9. The variable-frequency fan 9 heats the heat stored in the solid electric heat storage unit 20 through the circulating air in the low-temperature air zone 20-4. After being heated by the array hot air holes 17 of the solid energy storage body 1, it enters the saturated steam heat exchanger 4 through the high-temperature air channel 21 and exchanges heat with the pressurized deaerated water. After the heat-exchanged hot circulating air is cooled by secondary heat exchange through the water preheating heat exchanger 5, it is sent back to the low-temperature air zone 20-4 through the return air duct 10; among them, the variable-frequency fan 9 adjusts the air volume through the controller 27, thereby adjusting the heat energy output, and performs constant-temperature heating according to the steam pressure demand of the heat user 16, heating the pressurized deaerated water into saturated pressure water; the saturated pressure water in the saturated steam heat exchanger 4 of each heat storage and release unit 30-1 passes through the evaporation pipeline branch 22-1, is collected through the evaporation pipeline 22 and then input into the steam drum 6 for steam-water separation, forming saturated steam and under-saturated pressure water. The under-saturated pressure water is evenly distributed to each saturated steam heat exchanger 4 through each condensate descending pipeline branch 23-1 of the condensate descending pipeline 23 for secondary or multiple heating, repeating the cycle of heating and steam-water separation, forming a natural circulation system due to the water density difference between the under-saturated pressure water and the saturated pressure water; among them, the height of the evaporation surface of the steam drum 6 is accurately controlled through the controller 27 and the water level gauge 28; the saturated steam is evenly distributed to each superheated steam heat exchanger 3 through each saturated steam pipeline branch 19-1 of the saturated steam pipeline 19 for superheating. Start the upper variable-frequency fan 9-1. The upper variable-frequency fan 9-1 heats the heat stored in the upper part of the solid electric heat storage unit 20 through the circulating air in the low-temperature air zone 20-4. After being heated by the array hot air holes 17 of the upper solid energy storage body 1, it enters the superheated steam heat exchanger 3 through the high-temperature air channel 21-1 and exchanges heat with the saturated steam. After the heat-exchanged hot circulating air is cooled by secondary heat exchange through the water preheating heat exchanger 5, it is sent back to the low-temperature air zone 20-4 through the upper return air duct 10-1; among them, the upper variable-frequency fan 9-1 adjusts the air volume through the controller 27, thereby adjusting the heat energy output, and performs constant-temperature heating according to the steam temperature demand of the heat user 16, heating the saturated steam into superheated steam; the superheated steam output from the superheated steam heat exchanger 3 in each heat storage and release unit 30-1 is collected through the superheated steam pipeline 14 after passing through the superheated steam pipeline branch 14-1, and is output through the superheated steam output flange A interface 31-1 of the superheated steam unit 30.

[0016] Feed water deaeration and end fan cooling process: The feed water deaeration process of the device is comprehensively improved by combining the traditional thermal deaeration method, forming a comprehensive efficiency system with feed water deaeration as the main and end fan cooling as the auxiliary; through the device controller 27, the feed water is pressurized by the main water supply pump 41 from the main water supply source 42 to enter the deaerator 37 through the main water supply flange interface 40 for feed water atomization, and heat exchange is carried out with the saturated steam with adjustable internal pressure entering from the preheated steam output flange B interface 32-2, realizing feed water thermal deaeration. The oxygen released from the feed water is discharged to the outside by the deaerator exhaust valve 38, and the deaerated water enters the deaerator water tank 39; start the preheating make-up water pump 36, and the deaerated water in the deaerator water tank 39 is pressurized by the preheating make-up water pump 36 through the preheating make-up water pipeline flange B interface 34-2 and distributed to each superheated steam unit 30 through the preheating make-up water main pipeline 34, and enters the superheated steam unit 30 through the preheating make-up water pipeline flange A interface 34-1, and then is evenly distributed to the water preheating heat exchanger 5 of each heat storage and release unit 30-1 through the preheating make-up water pipeline 34-3. The deaerated water of the water preheating heat exchanger 5 is introduced through the preheating make-up water pipeline branch 34-4 and exchanges heat with the hot circulating air of the variable frequency fan 9 and the upper variable frequency fan 9-1 to increase the temperature, that is, corresponding to the secondary heat exchange and temperature reduction of the hot circulating air during the stable steam output process. The deaerated water exchanges heat and increases the temperature to form saturated water with adjustable internal pressure in the deaerator 37. The saturated water with adjustable internal pressure enters the preheated steam tank 24 for steam-water separation to form undersaturated water and saturated steam. The undersaturated water of each heat storage and release unit 30-1 is collected and output through the overflow pipeline branch 26-1 and the overflow pipeline 26 to the overflow pipeline flange A interface 33-1, and is collected through the overflow main pipeline 33 to the overflow pipeline flange B interface 33-2 and enters the deaerator water tank 39 to form a closed-loop forced circulation; among them, the saturated steam generated by the preheating heat exchanger 5 of each heat storage and release unit 30-1 is collected to the preheated steam pipeline 25 through the steam pipeline branch 25-1, and then is output from the preheated steam output flange A interface 32-1 of each superheated steam unit 30 to the preheated steam output main pipeline 32 for collection, and enters the deaerator 37 through the preheated steam output flange B interface 32-2 for heat exchange with the atomized feed water, realizing feed water thermal deaeration, and then forming a closed-loop forced circulation system, which can realize the process of feed water deaeration and end fan cooling and temperature reduction.

[0017] Heat storage working process: one, two or more solid electric heat storage units 20 constitute the electric heating part and heat storage part of a solid electric heat storage superheated steam output system. The heat storage working process electrically heats and stores energy in the solid electric heat storage unit 20 through the controller 27 of the device. The power supply of the external power grid 110kV~10kV is connected to the heating wire 20-1 set in the array hot air hole 17 of the solid energy storage body 1 through the high-voltage electric lead-in electrode 20-5. The heating wire 20-1 converts electrical energy into thermal energy and stores it in the solid energy storage body 1; wherein, the thermal insulation layer 2 is used to achieve thermal insulation between the device and the outside, and the high-voltage insulating support 20-2 is used to insulate the device from the ground and support the solid energy storage body 1; when the energy storage temperature of the device reaches the rated temperature upper limit, the heat storage working process stops.

[0018] Heat release working process: through the device controller 27, the water supply deoxygenation is achieved by the water supply deoxygenation and terminal fan cooling process, and the deoxygenated water is distributed to each superheated steam unit 30 through the evaporation water supply pipe flange B interface 35-2 of the deaerator water tank 39 and the evaporation water supply main pipeline 35. The superheated steam output through the steam stable output process of each superheated steam unit 30 is collected into the superheated steam output main pipeline 31 through the superheated steam output flange A interface 31-1, and is connected to the heat user 16 through the superheated steam output flange B interface 31-2 through the hot steam output main pipeline 31. When the superheated temperature or steam pressure of the steam does not meet the use requirements of the heat user 16, the heat release process stops.

[0019] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail, those skilled in the art should understand that the implementation methods of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the implementation methods of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A solid electric heat storage superheated steam output system, which is composed of one, two or more superheated steam units connected to a deaerator, a main water supply pump, a main water supply source, and a preheating makeup water pump through pipelines; the superheated steam unit is composed of one, two or more heat storage and release units, a steam drum, a water level gauge, an evaporation makeup water pump and the corresponding pipelines; the heat storage and release unit is composed of a solid electric heat storage unit, a superheated steam heat exchanger, a saturated steam heat exchanger, a water preheating heat exchanger, a variable frequency fan, an upper variable frequency fan, a return air duct, an upper return air duct, a high-temperature air channel, an upper high-temperature air channel, a preheated steam tank and the corresponding pipelines; the solid electric heat storage unit is composed of a solid energy storage body, a heat insulation layer, a high-voltage insulating support, a high-temperature air area and a low-temperature air area; characterized in that: The solid electric heat storage unit is sequentially connected into a loop through a high-temperature air duct, a saturated steam heat exchanger, a water preheating heat exchanger, a variable-frequency blower, and a return air duct, and is simultaneously connected into a loop through an upper high-temperature air duct, a superheated steam heat exchanger, a water preheating heat exchanger, an upper variable-frequency blower, and an upper return air duct; the superheated steam heat exchanger is connected to the superheated steam output flange A interface through a superheated steam pipeline branch and a superheated steam pipeline, and is simultaneously connected to the steam drum through a saturated steam pipeline branch and a saturated steam pipeline; the saturated steam heat exchanger is connected to the steam drum through an evaporation pipeline branch, an evaporation pipeline, a condensation down pipeline branch, and a condensation down pipeline, and is simultaneously connected to the evaporation make-up water pipeline flange A interface through an evaporation make-up water pipeline branch, an evaporation make-up water pipeline, and an evaporation make-up water pump; the water preheating heat exchanger is connected to a preheated steam tank, and is simultaneously connected to the preheated water make-up pipeline flange A interface through a preheated water make-up pipeline branch and a preheated water make-up pipeline; the preheated steam tank is connected to the preheated steam output flange A interface through a preheated steam pipeline branch and a preheated steam pipeline, and is simultaneously connected to the overflow pipeline flange A interface through an overflow pipeline branch and an overflow pipeline; the superheated steam unit is connected to a heat user through the superheated steam output flange A interface, a superheated steam output main pipeline, and a superheated steam output flange B interface, is connected to a deaerator through the preheated steam output flange A interface, a preheated steam output main pipeline, and a preheated steam output flange B interface, is connected to a deaerator water tank through the overflow pipeline flange A interface, an overflow main pipeline, and an overflow pipeline flange B interface, is connected to the deaerator water tank through the preheated water make-up pipeline flange A interface, a preheated water make-up main pipeline, a preheated water make-up pump, and a preheated water make-up pipeline flange B interface, and is connected to the deaerator water tank through the evaporation make-up water pipeline flange A interface, an evaporation make-up water main pipeline, and an evaporation make-up water pipeline flange B interface; the deaerator is connected to a main water supply source through a main water supply flange interface and a main water supply pump.

2. The solid electric heat storage superheated steam output system according to claim 1, characterized in that: The superheated steam unit is a structural combination body with a steam drum as the core, including one, two or more heat storage and release units and their corresponding accessories.

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