Steam supply heat storage and release system

Abstract

The invention relates to a steam supply heat storage and release system which comprises a steam heat storage module and a carbon capture module, a steam conveying connector of the steam heat storage module communicates with an auxiliary steam supply end through a first pipeline, and a carbon capture steam inlet connector of the carbon capture module communicates with the auxiliary steam supply end through a second pipeline. A steam conveying connector of the steam heat storage module is communicated with a carbon capture steam inlet connector of the carbon capture module through a third pipeline; a first switch valve is arranged on the first pipeline, a second switch valve is arranged on the second pipeline, and a third switch valve is arranged on the third pipeline. According to the technical scheme, when the unit is in the low-load operation working condition, the steam heat storage module can achieve steam storage (namely heat storage), and when the unit is in the low-load operation working condition and the unit is in the high-load operation working condition, the steam heat storage module can achieve steam release. Therefore, super-strong decoupling of the thermoelectric unit is achieved, and the purpose of improving the overall efficiency of the system is achieved.

Description

Technical Field

[0001] This disclosure relates to the field of steam supply, storage and release technology, and more specifically, to a steam supply, storage and release system. Background Technology

[0002] my country is a major coal-consuming country, with the world's largest installed capacity of coal-fired power generation. To improve the grid's capacity to absorb clean energy sources such as wind and solar power, coal-fired power units are gradually undergoing flexibility upgrades. Through technological transformation and optimized operation, the minimum output of most units has been reduced from about 50% of rated load to 30-40% of rated load. However, with the rapid development of clean energy sources such as wind and solar power, simply upgrading existing coal-fired power units to be more flexible is far from meeting the grid's demand for peak-shaving and frequency-regulating power. Therefore, configuring a certain proportion of thermal energy storage modules in coal-fired power plants has become a primary means of regulation. Summary of the Invention

[0003] The purpose of this disclosure is to provide a steam supply and heat storage system to solve the technical problems existing in the related art.

[0004] To achieve the above objectives, this disclosure provides a steam supply and heat storage system, including a steam heat storage module and a carbon capture module. The steam transmission interface of the steam heat storage module is connected to the auxiliary steam supply end through a first pipeline, the carbon capture steam inlet interface of the carbon capture module is connected to the auxiliary steam supply end through a second pipeline, and the steam transmission interface of the steam heat storage module and the carbon capture steam inlet interface of the carbon capture module are connected through a third pipeline.

[0005] A first switching valve is installed on the first pipeline, a second switching valve is installed on the second pipeline, and a third switching valve is installed on the third pipeline.

[0006] Optionally, the steam supply thermal storage system further includes an electric thermal storage module, which is electrically connected to the mains power grid. The electric thermal storage module has a heating chamber and an electric thermal storage steam inlet and an electric thermal storage steam outlet connected to the heating chamber. The electric thermal storage steam inlet is connected to the auxiliary steam supply end, and the electric thermal storage steam outlet is connected to the carbon capture steam inlet.

[0007] Optionally, the electric thermal storage steam inlet is connected to the third pipe via a fourth pipe, and a fourth switching valve is provided on the fourth pipe.

[0008] Optionally, the electric thermal storage steam outlet is connected to the carbon capture module via a fifth pipe, and a fifth switching valve is provided on the fifth pipe.

[0009] Optionally, the steam supply thermal storage system further includes a steam header, which has a first steam inlet, a second steam inlet, and a first steam outlet. The first steam inlet is connected to the third pipeline, the second steam inlet is connected to the steam outlet of the electric thermal storage module, and the first steam outlet is connected to the carbon capture steam inlet.

[0010] Optionally, a first regulating valve is provided at the first steam inlet, a second regulating valve is provided at the second steam inlet, and a third regulating valve is provided at the first steam outlet.

[0011] Optionally, the steam supply thermal storage system further includes a water thermal storage module. The water thermal storage module's water inlet is connected to the carbon capture outlet of the carbon capture module via a sixth pipe, and the water thermal storage module's water outlet is connected to the mine heating access terminal via a seventh pipe.

[0012] Optionally, the steam outlet of the steam thermal storage module is connected to the water inlet of the water thermal storage module through an eighth pipe, and a sixth switching valve is provided on the eighth pipe.

[0013] Optionally, the steam thermal storage module is filled with a thermal storage medium, which includes one or more of solid thermal storage media, phase change thermal storage media, and thermochemical thermal storage media.

[0014] Optionally, the solid thermal storage medium includes one or more of carbon-based materials, magnesium bricks, and sand and gravel;

[0015] The phase change thermal storage medium includes one or more of organic phase change materials, inorganic phase change materials, and eutectic phase change materials;

[0016] The thermochemical heat storage medium includes one or more of the following: calcium-based, hydrates, ammonium compounds, metal hydrides, hydroxides, and carbonates.

[0017] Optionally, the carbon-based material comprises flake graphite and liquefied asphalt, wherein the weight ratio of flake graphite to liquefied asphalt is 8:3.

[0018] With the above technical solution, under the condition that the auxiliary steam supply can meet the steam demand of the carbon capture module and the unit is operating at low load, the steam thermal storage module can be adjusted to thermal storage mode. That is, the first switch valve on the first pipeline and the second switch valve on the second pipeline are both adjusted to the open state (at this time, the third switch valve is in the closed state). In this way, a part of the steam flowing out from the auxiliary steam supply end enters the carbon capture module through the second pipeline to supply steam to the carbon capture module, and the other part of the steam flowing out from the auxiliary steam supply end enters the steam thermal storage module through the first pipeline, thereby realizing the storage of steam (i.e., the storage of heat).

[0019] When the auxiliary steam supply can meet the steam demand of the carbon capture module and the unit is operating under high load conditions, the steam storage module can be adjusted to heat release mode. This involves opening both the second switch valve on the second pipeline and the third switch valve on the third pipeline (while closing the first switch valve on the first pipeline). In this way, steam flowing from the auxiliary steam supply can enter the carbon capture module through the second pipeline to supply steam to the carbon capture module. Meanwhile, steam stored in the steam storage module can also flow into the carbon capture module through the third pipeline, thus supplementing the amount of steam entering the carbon capture module. This ensures that the steam temperature at the inlet of the carbon capture module meets the requirements, achieving strong decoupling of the thermal power unit and improving the overall efficiency of the system.

[0020] Similarly, when the auxiliary steam supply cannot meet the steam demand of the carbon capture module, and the unit is operating under low load conditions (such as when the unit is running at night), the steam storage module can be adjusted to heat release mode to supplement the amount of steam entering the carbon capture module.

[0021] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0023] Figure 1 This is a schematic diagram of the structural connection of a steam supply and heat storage system provided in an exemplary embodiment of this disclosure.

[0024] Explanation of reference numerals in the attached figures

[0025] 1-First switching valve; 2-Second switching valve; 3-Third switching valve; 4-Fourth switching valve; 5-Fifth switching valve; 6-Sixth switching valve; 7-First regulating valve; 8-Second regulating valve; 9-Third regulating valve; 10-Steam thermal storage module; 20-Carbon capture module; 21-Reboiler; 22-Regenerator; 30-Auxiliary steam supply end; 40-Electric thermal storage module; 50-Steam header; 60-Water thermal storage module; 70-Mining area heating access end; 71-Seventh switching valve; 72-Ninth switching valve; 80-Industrial park end; 81-Eighth switching valve. Detailed Implementation

[0026] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0027] In this disclosure, unless otherwise stated, directional terms such as "inner" and "outer" refer to the inner and outer contours of the relevant components. Furthermore, it should be noted that terms such as "first" and "second" are used to distinguish one element from another and do not indicate sequence or importance. Additionally, in the description with reference to the accompanying drawings, the same reference numerals in different drawings denote the same elements.

[0028] refer to Figure 1 As shown, this disclosure provides a steam supply and heat storage system, including a steam heat storage module 10 and a carbon capture module 20. The steam transmission interface of the steam heat storage module 10 is connected to the auxiliary steam supply end 30 through a first pipe, and the carbon capture steam inlet interface of the carbon capture module 20 is connected to the auxiliary steam supply end 30 through a second pipe. The steam transmission interface of the steam heat storage module 10 and the carbon capture steam inlet interface of the carbon capture module 20 are connected through a third pipe. A first switching valve 1 is provided on the first pipe, a second switching valve 2 is provided on the second pipe, and a third switching valve 3 is provided on the third pipe.

[0029] With the above technical solution, under the condition that the auxiliary steam supply end 30 can meet the steam demand of the carbon capture module 20 and the unit is operating under low load, the steam heat storage module 10 can be adjusted to heat storage mode. That is, the first switch valve 1 on the first pipeline and the second switch valve 2 on the second pipeline are both adjusted to the open state (at this time, the third switch valve 3 is in the closed state). In this way, a part of the steam flowing out from the auxiliary steam supply end 30 enters the carbon capture module 20 through the second pipeline to supply steam to the carbon capture module 20, and the other part of the steam flowing out from the auxiliary steam supply end 30 enters the steam heat storage module 10 through the first pipeline, thereby realizing the storage of steam (i.e., the storage of heat).

[0030] When the auxiliary steam supply end 30 can meet the steam demand of the carbon capture module 20, and the unit is operating under high load conditions, the steam storage module 10 can be adjusted to the heat release mode. That is, the second switch valve 2 on the second pipeline and the third switch valve 3 on the third pipeline are both adjusted to the open state (the first switch valve 1 on the first pipeline is adjusted to the closed state). In this way, the steam flowing out from the auxiliary steam supply end 30 can enter the carbon capture module 20 through the second pipeline to supply steam to the carbon capture module 20. At the same time, the steam stored in the steam storage module 10 can also flow into the carbon capture module 20 through the third pipeline to supplement the amount of steam entering the carbon capture module 20, so that the steam temperature at the inlet of the carbon capture module 20 can meet the requirements, achieve strong decoupling of the thermal power unit, and improve the overall efficiency of the system.

[0031] Similarly, when the auxiliary steam supply 30 cannot meet the steam demand of the carbon capture module 20, and the unit is operating under low load conditions (such as when the unit is running at night), the steam storage module 10 can be adjusted to the heat release mode to supplement the amount of steam entering the carbon capture module 20.

[0032] To further enhance the decoupling and peak-shaving capabilities of the steam supply and storage heat system, optionally, in one exemplary embodiment provided in this disclosure, such as... Figure 1 As shown, the steam supply thermal storage system may further include an electric thermal storage module 40. The electric thermal storage module 40 is electrically connected to the mains power grid. The electric thermal storage module 40 has a heating chamber and an electric thermal storage steam inlet and outlet connected to the heating chamber. The electric thermal storage steam inlet is connected to the auxiliary steam supply end 30, and the electric thermal storage steam outlet is connected to the carbon capture steam inlet. This electric thermal storage module 40 can store electrical energy and can release heat to the steam when the unit is operating under high load or when the steam pressure at the auxiliary steam supply end 30 cannot meet the steam requirements of the carbon capture module 20, thereby heating the steam and increasing its pressure and temperature.

[0033] Specifically, for example, during off-peak hours at night (utilizing low-priced off-peak electricity, resulting in high energy efficiency and effectively reducing operating costs), the electric thermal storage module 40 can operate in thermal storage mode (electricity storage). During peak daytime load periods, the electric thermal storage module 40 can enter heat release mode, converting electrical energy into heat energy to reheat the steam flowing into the module. Furthermore, when deep peak shaving is required, the aforementioned electric thermal storage module 40 can also be used to achieve significant peak shaving, supplying high-temperature steam for industrial use, reducing the amount of steam extracted from the unit, allowing the unit to operate under high loads, and achieving superior decoupling of the thermal power unit.

[0034] Alternatively, in another exemplary embodiment provided in this disclosure, the above-mentioned electric thermal storage module 40 can also be a photovoltaic module. In this way, during the daytime when there is sufficient sunlight, the photovoltaic module can absorb sunlight to generate electricity, make full use of clean and renewable energy, and heat the steam. This reduces the amount of steam extracted by the unit while increasing the steam temperature, thereby reducing the load on the unit.

[0035] Furthermore, the electric thermal storage module 40 and the steam thermal storage module 10 can work synergistically. For example, when the auxiliary steam supply end 30 can meet the steam demand of the carbon capture module 20 and the unit is operating at a low load, both the electric thermal storage module 40 and the steam thermal storage module 10 can enter the thermal storage state to store the waste heat of the unit. When the auxiliary steam supply end 30 can meet the steam demand of the carbon capture module 20 and the unit is operating at a high load, the steam thermal storage module 10 can be adjusted to the heat release state first. If the heat release of the steam thermal storage module 10 is still insufficient to meet the demand, the electric thermal storage module 40 can also be adjusted to the heat release state. In this way, the steam thermal storage module 10 and the electric thermal storage module 40 release heat together, further increasing the steam temperature and meeting the usage requirements under different weather conditions and at different times.

[0036] Specifically, such as Figure 1 As shown, the electric thermal storage steam inlet can be connected to the third pipe via a fourth pipe, and a fourth switch valve 4 is installed on the fourth pipe. Thus, when steam needs to be heated, the electric thermal storage module 40 can be adjusted to a heat release state first, and then the fourth switch valve 4 can be opened. At this time, the steam flowing from the auxiliary steam supply end 30 into the third pipe can flow into the fourth pipe and enter the electric thermal storage module 40 through the electric thermal storage steam inlet. The high-temperature steam heated by the electric thermal storage module 40 flows out from the electric thermal storage steam outlet of the electric thermal storage module 40 and enters the carbon capture module 20.

[0037] To regulate the steam flowing from the electric thermal storage module 40 into the carbon capture module 20, optionally, as follows: Figure 1 As shown, the electric thermal storage steam outlet is connected to the carbon capture module 20 via a fifth pipe, and a fifth switching valve 5 is installed on the fifth pipe. Thus, when peak shaving of the unit is not required or when the peak shaving needs of the unit can be met using only the steam thermal storage module 10, both the fourth switching valve 4 on the fourth pipe and the fifth switching valve 5 on the fifth pipe can be adjusted to the closed state. In this case, the steam does not need to pass through the electric thermal storage module 40 during its journey from the auxiliary steam supply end 30 to the carbon capture module 20, thereby shortening the steam flow path and reducing steam pressure and temperature losses.

[0038] In this disclosure, such as Figure 1As shown, the steam supply thermal storage system may further include a steam header 50, which has a first steam inlet, a second steam inlet, and a first steam outlet. The first steam inlet is connected to a third pipeline, the second steam inlet is connected to the steam outlet of the electric thermal storage module 40, and the first steam outlet is connected to the carbon capture steam inlet. In other words, the steam entering the carbon capture module 20 is collected in the steam header 50 before entering the carbon capture module 20. The steam header 50 can collect, mix, and distribute the working fluid, making the temperature of the steam flowing out of the steam header 50 more uniform and consistent.

[0039] In addition, in order to monitor the flow rate, pressure and temperature of steam entering the steam header 50 from different modules, flow meters, pressure detection modules and temperature detection modules (not shown) can be installed at the first steam inlet, the second steam inlet and the first steam outlet.

[0040] Because there are certain temperature differences between the steam flowing out from the auxiliary steam supply end 30, the steam thermal storage module 10, and the electric thermal storage module 40, in order to facilitate the adjustment of the temperature of the steam entering the carbon capture module 20, optionally, such as... Figure 1 As shown, a first regulating valve 7 is installed at the first steam inlet, a second regulating valve 8 is installed at the second steam inlet, and a third regulating valve 9 is installed at the first steam outlet. Thus, by adjusting the first regulating valve 7 at the first steam inlet, the flow rate of steam entering the steam header 50 from the steam thermal storage module 10 can be adjusted. By adjusting the second regulating valve 8 at the second steam inlet, the flow rate of steam entering the steam header 50 from the electric thermal storage module 40 can be adjusted. By adjusting the flow rate of steam entering the steam header 50 from different modules, the steam temperature within the steam header 50 can be regulated.

[0041] Specifically, the steam entering the steam header 50 from the steam thermal storage module 10 and the steam entering the steam header 50 from the electric thermal storage module 40 have relatively high temperatures, while the steam discharged from the auxiliary steam supply end 30 has a relatively low temperature. Thus, when the temperature of the steam discharged from the first steam outlet of the steam header 50 is too high, the first regulating valve 7 can be adjusted to a smaller value or the second regulating valve 8 can be adjusted to a larger value. When the temperature of the steam discharged from the first steam outlet of the steam header 50 is too low, the first regulating valve 7 can be adjusted to a larger value or the second regulating valve 8 can be adjusted to a smaller value. When the flow rate of the steam discharged from the first steam outlet of the steam header 50 is too large, the first regulating valve 7 and / or the second regulating valve 8 can be adjusted to a smaller value. Similarly, when the flow rate of the steam discharged from the first steam outlet of the steam header 50 is too small, the first regulating valve 7 and / or the second regulating valve 8 can be adjusted to a larger value.

[0042] Optionally, such as Figure 1As shown, the steam supply thermal storage system may further include a water thermal storage module 60. The water inlet of the water thermal storage module 60 is connected to the carbon capture outlet of the carbon capture module 20 via a sixth pipe, and the water outlet of the water thermal storage module 60 is connected to the mine heating access terminal 70 via a seventh pipe. By setting up the water thermal storage module 60, the condensate generated by the carbon capture module 20 can be collected and used for mine water use via the seventh pipe, thereby realizing the recycling of the condensate generated by the carbon capture module 20 and improving the energy-saving level of the carbon capture module 20. Furthermore, a seventh switch valve 71 is also installed on the seventh pipe, which can control the discharge of condensate.

[0043] like Figure 1 As shown, optionally, the steam outlet of the steam storage module 10 is connected to the inlet of the water storage module 60 via an eighth pipe, and a sixth switch valve 6 is installed on the eighth pipe. Since the steam outlet of the steam storage module 10 is connected to the water storage module 60 via the eighth pipe, when the sixth switch valve 6 is opened, the condensate generated by the steam storage module 10 during steam storage can flow into the water storage module 60, thereby achieving the recycling of this portion of condensate.

[0044] like Figure 1 As shown, the carbon capture module 20 may include a reboiler 21 and a regenerator 22, wherein the steam inlet of the reboiler 21 may be the carbon capture steam inlet of the carbon capture module 20.

[0045] Optionally, the steam thermal storage module 10 is filled with a thermal storage medium, which may include one or more of solid thermal storage media, phase change thermal storage media, and thermochemical thermal storage media.

[0046] Specifically, in the exemplary embodiments provided in this disclosure, the solid thermal storage medium includes one or more of carbon-based materials, magnesium bricks, and sand; the phase change thermal storage medium includes one or more of organic phase change materials, inorganic phase change materials, and eutectic phase change materials; and the thermochemical thermal storage medium includes one or more of calcium-based materials, hydrates, ammonides, metal hydrides, hydroxides, and carbonates.

[0047] It should be noted that, for embodiments where the heat storage medium is a carbon-based material, the carbon-based material may include flake graphite and liquefied asphalt, with a weight ratio of flake graphite to liquefied asphalt of 8:3. Using the above-mentioned materials, the heat storage medium enables the steam heat storage module 10 to have a higher heat storage temperature, allowing the steam discharged from the steam heat storage module 10 to reach the temperature requirement at the inlet of the reboiler 21. For example, in another exemplary embodiment provided in this disclosure, the heat storage medium may also be molten salt, i.e., a melt composed of metal cations and non-metal anions. Specifically, the molten salt may include multiple molten salt heat storage units, which are connected sequentially to allow steam and condensate to exchange heat step-by-step within the molten salt heat storage units. Molten salt has the characteristics of high boiling point, low viscosity, low vapor pressure, and high volumetric heat, making it an excellent heat storage medium.

[0048] In addition, such as Figure 1 As shown, the steam supply and heat storage system may also include a ninth pipe. One end of the ninth pipe may be connected to the third pipe, and the other end of the ninth pipe may be connected to the industrial park end 80. Furthermore, an eighth switch valve 81 is installed on the ninth pipe. In this way, when there is a surplus of steam in the auxiliary steam supply end 30 or the steam heat storage module 10, the eighth switch valve 81 can be opened, and the steam stored in the steam heat storage module 10 can also be used for heating the industrial park end 80.

[0049] like Figure 1 As shown, the water outlet of the water storage module 60 can also be connected to the steam inlet of the steam storage module 10 through the tenth pipe. Furthermore, a ninth switch valve 72 is installed on the tenth pipe. In this way, when the steam in the steam storage module 10 is almost completely discharged, the ninth switch valve 72 can be opened. On the one hand, this part of the condensate can be reused. On the other hand, the condensate flowing into the steam storage module 10 can also exchange heat with the heat storage medium in the steam storage module 10, absorbing the heat in the heat storage medium to regenerate a certain amount of steam.

[0050] It should be noted that, in this disclosure, the aforementioned switching valve can be a solenoid valve, and the steam supply and heat storage system includes multiple circulating pumps for driving the flow of steam or condensate in the corresponding pipelines, which will not be elaborated upon in this disclosure.

[0051] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0052] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0053] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A steam supply, storage, and heat release system, characterized in that, It includes a steam thermal storage module and a carbon capture module. The steam transmission interface of the steam thermal storage module is connected to the auxiliary steam supply end through a first pipeline. The carbon capture steam inlet interface of the carbon capture module is connected to the auxiliary steam supply end through a second pipeline. The steam transmission interface of the steam thermal storage module and the carbon capture steam inlet interface of the carbon capture module are connected through a third pipeline. A first switching valve is installed on the first pipeline, a second switching valve is installed on the second pipeline, and a third switching valve is installed on the third pipeline.

2. The steam supply and heat storage system according to claim 1, characterized in that, The steam supply thermal storage system also includes an electric thermal storage module, which is electrically connected to the mains power grid. The electric thermal storage module has a heating chamber and an electric thermal storage steam inlet and an electric thermal storage steam outlet connected to the heating chamber. The electric thermal storage steam inlet is connected to the auxiliary steam supply end, and the electric thermal storage steam outlet is connected to the carbon capture steam inlet.

3. The steam supply and heat storage system according to claim 2, characterized in that, The electric thermal storage steam inlet is connected to the third pipe through a fourth pipe, and a fourth switching valve is installed on the fourth pipe.

4. The steam supply and heat storage system according to claim 2, characterized in that, The electric thermal storage steam outlet is connected to the carbon capture module via a fifth pipe, and a fifth switching valve is installed on the fifth pipe.

5. The steam supply and heat storage system according to claim 3, characterized in that, The steam supply and thermal storage system further includes a steam header, which has a first steam inlet, a second steam inlet, and a first steam outlet. The first steam inlet is connected to the third pipeline, the second steam inlet is connected to the steam outlet of the electric thermal storage module, and the first steam outlet is connected to the carbon capture steam inlet.

6. The steam supply and heat storage system according to claim 5, characterized in that, A first regulating valve is provided at the first steam inlet, a second regulating valve is provided at the second steam inlet, and a third regulating valve is provided at the first steam outlet.

7. The steam supply and heat storage system according to any one of claims 1-6, characterized in that, The steam supply thermal storage system also includes a water thermal storage module. The water thermal storage module’s water inlet is connected to the carbon capture outlet of the carbon capture module via a sixth pipe, and the water thermal storage module’s water outlet is connected to the mining area’s heating access terminal via a seventh pipe.

8. The steam supply and heat storage system according to claim 7, characterized in that, The steam outlet of the steam thermal storage module is connected to the inlet of the water thermal storage module through an eighth pipe, and a sixth switching valve is installed on the eighth pipe.

9. The steam supply and heat storage system according to any one of claims 1-6, characterized in that, The steam thermal storage module is filled with a thermal storage medium, which includes one or more of solid thermal storage media, phase change thermal storage media, and thermochemical thermal storage media.

10. The steam supply and heat storage system according to claim 9, characterized in that, The solid thermal storage medium includes one or more of carbon-based materials, magnesium bricks, and sand and gravel; The phase change thermal storage medium includes one or more of organic phase change materials, inorganic phase change materials, and eutectic phase change materials; The thermochemical heat storage medium includes one or more of the following: calcium-based, hydrates, ammonium compounds, metal hydrides, hydroxides, and carbonates.

11. The steam supply and heat storage system according to claim 10, characterized in that, The carbon-based material comprises flake graphite and liquefied asphalt, with a weight ratio of flake graphite to liquefied asphalt of 8:3.

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