Solid particle fixed bed heat storage and composite bed heat release system driven by valley electricity / abandoned electricity

Abstract

The invention belongs to the technical field of electric energy storage systems, and relates to a valley electricity / abandoned electricity driven solid particle fixed bed heat storage and composite bed heat release system which comprises an electric energy storage system and a heat energy release system. According to the fixed bed heat storage coupling composite bed heat release integrated device in the electric energy storage system, power grid off-peak electricity or abandoned electricity of a new energy power generation system is used as input energy, fine solid particles in the fixed bed heat storage coupling composite bed heat release integrated device are heated by adjusting the power of an electric heater, and efficient heat energy storage is achieved. Boosted normal-temperature air output by a fan / air compressor in the heat energy release system exchanges heat with high-temperature particles to generate high-temperature air; high-temperature air is converted into hot water, hot air and steam through the gas-water / gas-gas composite heat exchanger and the evaporation heat exchanger, and flexible release of heat energy is achieved. The economical efficiency and flexibility of high-temperature heat energy storage are improved, and efficient and low-cost supply of various heating power such as hot water, hot air and steam is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric energy storage systems, and in particular to a solid particle fixed bed heat storage and composite bed heat release system driven by valley power / abandoned power. Background Art

[0002] As the global energy mix shifts toward a low-carbon, clean energy future, new energy generation technologies, represented by wind power and photovoltaics, are rapidly developing. However, due to the random, intermittent, and volatile nature of renewable energy generation, it is often forced to curtail or abandon generation when grid capacity is insufficient or load demand is low, resulting in significant waste of clean energy. With the rapid growth of renewable energy installed capacity, the phenomenon of "wind and solar curtailment" is becoming increasingly severe, severely hindering the sustainable development of the new energy industry. To alleviate the problem of curtailment, technologies such as pumped hydropower storage, electrochemical energy storage, and demand-side response are currently being used to provide peak-shaving and valley-filling energy. However, existing energy storage technologies face significant bottlenecks, including high cost, difficulty in long-term storage, and poor operational flexibility. Furthermore, these technologies primarily store energy in the form of electricity, making it difficult to directly meet end-use thermal energy needs such as industrial heating and district heating. This results in complex energy utilization pathways and low overall efficiency. There is an urgent need to develop thermal energy storage technologies that offer excellent long-term energy storage performance, low cost, and efficient and flexible storage and discharge operations. Summary of the Invention

[0003] To address the technical issues raised above, a solid particle fixed-bed heat storage and composite-bed heat release system driven by valley / wasted electricity is provided. This invention primarily utilizes an electrical energy storage system and a thermal energy release system to efficiently utilize abandoned electricity generated by renewable energy power generation systems or valley electricity generated by the power grid. This energy is converted into thermal energy through an integrated fixed-bed heat storage coupled with a composite-bed heat release device, and then fed into the thermal energy release system for heating, heat supply, or other industrial production.

[0004] The technical means adopted in the present invention are as follows: A solid particle fixed bed heat storage and composite bed heat release system driven by valley power / abandoned power, comprising: an electric energy storage system and a thermal energy release system, wherein: The fixed-bed heat storage coupled composite bed heat release integrated device in the electric energy storage system utilizes the abandoned electricity of the new energy power generation system or the off-peak electricity of the power grid as input energy to heat the fine solid particles in the fixed-bed heat storage coupled composite bed heat release integrated device, thereby realizing efficient thermal energy storage of the fixed-bed solid particles.

[0005] The high-temperature air output by the fixed-bed heat storage coupled composite bed heat release integrated device in the thermal energy release system is converted into normal-temperature water and normal-temperature air through an air-water / air-air composite heat exchanger and an evaporative heat exchanger, thereby releasing thermal energy.

[0006] Furthermore, the fixed-bed heat storage coupled composite bed heat release integrated device is filled with fine solid particles with a particle size of 0.02 mm to 0.15 mm. During the electric energy storage stage, the heat storage rate and efficiency are controlled by adjusting the filling height and fullness of the solid particles and the electric heating power; during the heat release stage, the heat release rate and efficiency are controlled by adjusting the air flow flowing through the fixed-bed heat storage coupled composite bed heat release integrated device.

[0007] Furthermore, the electric energy storage system includes: a new energy power generation system, a power grid and a fixed bed heat storage coupled composite bed heat release integrated device, wherein: The new energy power generation system and the power grid are respectively connected to a fixed bed heat storage coupled composite bed heat release integrated device, which contains an electric heater and a heat exchange coil. The abandoned electricity generated by the new energy power generation system or the valley electricity generated by the power grid is used as input energy to heat the room-temperature solid particles filled in the fixed bed heat storage coupled composite bed heat release integrated device into high-temperature solid particles.

[0008] The new energy power generation system is connected to the power grid, and when the power grid demand is at its peak, the new energy power generation system will send the generated electricity to the power grid.

[0009] Furthermore, the heat energy release system includes: a fixed bed heat storage coupled with a composite bed heat release integrated device, a fan / air compressor, a water storage tank, a filter device, an air-water / air-air composite heat exchanger and an evaporative heat exchanger, wherein: One end of the fan / air compressor is connected to a fixed bed heat storage coupled composite bed heat release integrated device, and is used to input the pressurized normal temperature air output by the fan / air compressor into the fixed bed heat storage coupled composite bed heat release integrated device, and exchange heat with the high-temperature particles in the fixed bed heat storage coupled composite bed heat release integrated device to generate high-temperature air with impurities; the other end of the fan / air compressor is connected to an air-water / air-air composite heat exchanger, and is used to input the pressurized normal temperature air output by the fan / air compressor into the air-water / air-air composite heat exchanger.

[0010] One end of the filtering device is connected to a fixed bed heat storage coupled composite bed heat release integrated device, and the other end is connected to an air-water / air-air composite heat exchanger and an evaporative heat exchanger, respectively, for purifying impurities in the high-temperature air output by the fixed bed heat storage coupled composite bed heat release integrated device.

[0011] The water storage tank is connected to the air-water / air-air composite heat exchanger, and is used to input the normal temperature water stored in the water storage tank into the air-water / air-air composite heat exchanger. The gas-water / gas-gas composite heat exchanger is connected to the evaporative heat exchanger and is used to input the hot water output by the gas-water / gas-gas composite heat exchanger into the evaporative heat exchanger.

[0012] The air-water / air-air composite heat exchanger uses the purified high-temperature air output by the filter device and the medium-temperature air output by the evaporative heat exchanger as input heat sources; the purified high-temperature air output by the filter device and the medium-temperature air output by the evaporative heat exchanger exchange heat with the pressurized normal-temperature air output by the fan / air compressor and the normal-temperature water output by the water storage tank in the air-water / air-air composite heat exchanger, and outputs hot water and hot air.

[0013] The evaporative heat exchanger uses the purified high-temperature air output by the filter device as an input heat source; the purified high-temperature air output by the filter device exchanges heat with the hot water output by the air-water / air-air composite heat exchanger in the evaporative heat exchanger, and outputs steam and medium-temperature air; the medium-temperature air output by the evaporative heat exchanger is input to the air-water / air-air composite heat exchanger.

[0014] Furthermore, the hot water output by the gas-water / gas-gas composite heat exchanger can be used as the input of a general place heating device; the hot air output by the gas-water / gas-gas composite heat exchanger can be used as the input of an electrical equipment heating device, and can also be discharged into the air; the steam output by the evaporative heat exchanger can be used for heating or other industrial production.

[0015] Compared with the prior art, the present invention has the following advantages: The present invention provides a solid particle fixed-bed heat storage and composite bed heat release system driven by valley / wasted electricity. Solid particles with a particle size of 0.02mm-0.15mm are loaded into an integrated fixed-bed heat storage and composite bed heat release device. The filling height and fullness of the solid particles are adjusted to ensure close contact and packing of different particles. By utilizing abandoned power from a new energy generation system or valley power from the grid, the solid particles are heated by an electric heater. By adjusting the power of the electric heater, the solid particles in the fixed-bed heat storage and composite bed heat release device are heated, achieving efficient thermal energy storage of the fixed-bed solid particles. The process is simple and reliable.

[0016] The solid particle fixed bed heat storage and composite bed heat release system driven by valley power / abandoned power provided by the present invention is a system in which the pressurized normal-temperature air output by the fan / air compressor passes through a fixed bed heat storage coupled with a composite bed heat release integrated device to exchange heat with the high-temperature particles therein, generating high-temperature air; the high-temperature air is converted into hot water, hot air and steam through an air-water / air-air composite heat exchanger and an evaporative heat exchanger, thereby realizing flexible release of thermal energy.

[0017] The present invention improves the economic efficiency of high-temperature thermal energy storage based on intermittent renewable energy power abandonment or grid off-peak power and the flexibility of its release, and realizes the efficient and low-cost supply of various heat sources such as hot water, hot air and steam in power stations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic diagram of the structure of the solid particle fixed bed heat storage and composite bed heat release system driven by valley power / abandoned power in the present invention.

[0020] In the figure: 1. New energy power generation system; 2. Power grid; 3. Fixed bed heat storage coupled with composite bed heat release integrated device; 4. Fan / air compressor; 5. Water storage tank; 6. Filtration device; 7. Air-water / air-air composite heat exchanger; 8. Evaporative heat exchanger; 9. General place heating device; 10. Electrical equipment heating device. DETAILED DESCRIPTION

[0021] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0024] Unless otherwise specified, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments can have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0025] The use of terms such as "first" and "second" to limit components is only to facilitate the distinction between corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0026] like Figure 1 As shown, the present invention provides a solid particle fixed bed heat storage and composite bed heat release system driven by valley power / abandoned power, including: an electric energy storage system and a thermal energy release system, wherein the electric energy storage system is connected to the thermal energy release system, wherein: The fixed bed heat storage coupled composite bed heat release integrated device 3 in the electric energy storage system utilizes the abandoned electricity of the new energy power generation system 1 or the valley electricity of the power grid 2 as input energy to heat the fine solid particles in the fixed bed heat storage coupled composite bed heat release integrated device 3, thereby realizing efficient thermal energy storage of the fixed bed solid particles.

[0027] The high-temperature air output by the fixed-bed heat storage coupled composite bed heat release integrated device 3 in the heat energy release system is converted into hot water, hot air and steam by using the gas-water / gas-gas composite heat exchanger 7 and the evaporative heat exchanger 8 to realize the flexible release of heat energy.

[0028] In practice, as a preferred embodiment of the present invention, the fixed-bed heat storage-coupled composite bed heat release integrated device 3 is filled with fine solid particles with a particle size of 0.02 mm to 0.15 mm. During the electrical energy storage phase, the heat storage rate and efficiency are controlled by adjusting the solid particle filling height and degree, as well as the electrical heating power. During the thermal energy release phase, the heat release rate and efficiency are controlled by adjusting the air flow through the fixed-bed heat storage-coupled composite bed heat release integrated device 3. The solid particles used as the heat storage medium include quartz sand, magnesium oxide, aluminum oxide, iron oxide, ash, river sand, and the like.

[0029] In specific implementation, as a preferred embodiment of the present invention, the electric energy storage system includes: a new energy power generation system 1, a power grid 2 and a fixed bed heat storage coupled composite bed heat release integrated device 3, wherein: The new energy power generation system 1 and the power grid 2 are respectively connected to a fixed bed heat storage coupled composite bed heat release integrated device 3. The fixed bed heat storage coupled composite bed heat release integrated device 3 contains an electric heater and a heat exchange coil. The abandoned electricity generated in the new energy power generation system 1 or the valley electricity generated in the power grid 2 is used as input energy to heat the tightly contacted normal temperature solid particles filled therein into high temperature solid particles.

[0030] The new energy power generation system 1 is connected to the power grid 2. When the power grid demand is at its peak, the electricity generated by the new energy power generation system 1 is sent to the power grid 2, thereby increasing the revenue from electricity sales.

[0031] In specific implementation, as a preferred embodiment of the present invention, the heat energy release system includes: a fixed bed heat storage coupled composite bed heat release integrated device 3, a fan / air compressor 4, a water storage tank 5, a filter device 6, an air-water / air-air composite heat exchanger 7 and an evaporative heat exchanger 8, wherein: One end of the fan / air compressor 4 is connected to the fixed bed heat storage coupled composite bed heat release integrated device 3, which is used to input the pressurized normal temperature air output by the fan / air compressor 4 into the fixed bed heat storage coupled composite bed heat release integrated device 3, and exchange heat with the high-temperature particles in the fixed bed heat storage coupled composite bed heat release integrated device 3 to produce high-temperature air with impurities; the other end of the fan / air compressor 4 is connected to the air-water / air-air composite heat exchanger 7, which is used to input the pressurized normal temperature air output by the fan / air compressor 4 into the air-water / air-air composite heat exchanger 7.

[0032] One end of the filter device 6 is connected to the fixed bed heat storage coupled composite bed heat release integrated device 3, and the other end is connected to the air-water / air-air composite heat exchanger 7 and the evaporative heat exchanger 8 respectively, which is used to purify impurities in the high-temperature air output by the fixed bed heat storage coupled composite bed heat release integrated device 3.

[0033] The water storage tank 5 is connected to the air-water / air-air composite heat exchanger 7 for inputting the normal temperature water stored in the water storage tank 5 into the air-water / air-air composite heat exchanger 7 . The gas-water / gas-gas composite heat exchanger 7 is connected to the evaporative heat exchanger 8 and is used to input the hot water outputted from the gas-water / gas-gas composite heat exchanger 7 into the evaporative heat exchanger 8 .

[0034] The air-water / air-air composite heat exchanger 7 uses the purified high-temperature air output by the filter device 6 and the medium-temperature air output by the evaporative heat exchanger 8 as input heat sources; the purified high-temperature air output by the filter device 6 and the medium-temperature air output by the evaporative heat exchanger 8 exchange heat with the pressurized normal-temperature air output by the fan / air compressor 4 and the normal-temperature water output by the water storage tank 5 in the air-water / air-air composite heat exchanger 7, and outputs hot water and hot air.

[0035] Evaporative heat exchanger 8 uses the purified, high-temperature air output by filter 6 as an input heat source. The purified, high-temperature air output by filter 6 exchanges heat with hot water output by air-water / air-air composite heat exchanger 7 in evaporative heat exchanger 8, outputting steam and medium-temperature air. The medium-temperature air output by evaporative heat exchanger 8 is input to air-water / air-air composite heat exchanger 7. In specific implementations, as a preferred embodiment of the present invention, the hot water output by air-water / air-air composite heat exchanger 7 serves as input to general space heating device 9. The hot air output by air-water / air-air composite heat exchanger 7 can serve as input to electrical equipment heating device 10 or be discharged into the air. The steam output by evaporative heat exchanger 8 can be used for heating or other industrial production.

[0036] For thermal power plants, the system's heat input can also come from the main steam or high-temperature flue gas of coal-fired boilers, forming a thermal energy storage and release system coupled to the working fluid side or combustion side of the thermal power generation plant. During the non-heating season and when heat supply demand is low, hot air can be fed into the combustion system to recover waste heat, forming a thermal energy release system coupled to the combustion side of the thermal power generation plant.

[0037] Example 1 Fine solid particles with a particle size of 0.02mm-0.15mm are loaded into the integrated fixed-bed heat storage-coupled composite bed heat release device 3. The filling height and fullness of the solid particles are adjusted to ensure close contact and packing of the different particles. The solid particles are heated by an electric heater using abandoned power from the renewable energy power generation system 1 or off-peak power from the grid 2. By adjusting the power of the electric heater, the solid particles in the integrated fixed-bed heat storage-coupled composite bed heat release device 3 can reach a maximum temperature exceeding 800°C, achieving efficient thermal energy storage of the fixed-bed solid particles and a simple and reliable process.

[0038] Example 2 Driven by fan / compressor 4, the pressurized ambient air passes through the heat exchange coils between the particles within the fixed-bed heat storage-coupled composite bed heat release device 3, where it is indirectly heated by the high-temperature solid particles to high-temperature air (maximum temperature reaching 750°C). After passing through filter 6, the high-temperature air passes through air-to-water / air-to-air composite heat exchanger 7, heating ambient-temperature water from the water storage tank 5 to hot water (60°C-80°C) and the pressurized ambient-temperature air from the fan / compressor 4 to hot air (50°C-60°C). Furthermore, the hot water from the air-to-water / air-to-air composite heat exchanger 7 is heated by the high-temperature air to steam (0.6 MPa / 200°C) through evaporative heat exchanger 8. The high-temperature air is then cooled to medium-temperature air (250°C), which serves as the heat source for air-to-water / air-to-air composite heat exchanger 7. By adjusting the flow rates of ambient-temperature water and air, the high-temperature and medium-temperature air can be cooled and converted to hot air (50°C-60°C). The hot water generated can be used for heating devices in general places such as pump rooms and dormitories depending on the temperature. The hot air generated can be used for heating devices for electrical equipment in electronic rooms, main control rooms, etc. The steam generated can be used for self-supply or external sales, realizing efficient and economical flexible heating.

[0039] Example 3 Driven by fan / compressor 4, the pressurized ambient air passes through the air distribution plate and through the integrated fixed-bed heat storage and coupled composite bed heat release device 3, where it forms a vigorous gas-solid two-phase fluidized bed flow heat exchange with the solid particles. The high-temperature solid particles heat the air to high-temperature air (maximum temperature of 750°C). After passing through filter device 6, the high-temperature air passes through air-to-water / air-to-air composite heat exchanger 7, heating the ambient-temperature water from water storage tank 5 to hot water (60°C-80°C) and the pressurized ambient air from fan / compressor 4 to hot air (50°C-60°C). Furthermore, the hot water from the air-to-water / air-to-air composite heat exchanger 7 is heated by the high-temperature air to steam (0.6MPa / 200°C) through evaporative heat exchanger 8. The high-temperature air is then cooled to medium-temperature air (250°C), which serves as the heat source for air-to-water / air-to-air composite heat exchanger 7. By adjusting the flow rates of ambient-temperature water and air, high-temperature and medium-temperature air can be cooled and converted into hot air (50-60°C). Depending on the temperature, the resulting hot water can be used to heat general heating systems in areas like pump rooms and dormitories. The resulting hot air can be used to heat electrical equipment in electronic rooms and control rooms. The steam generated can be used for internal supply or external sales, achieving efficient and economical flexible heating.

[0040] The system stores surplus electricity during low energy demand periods through a fixed-bed heat storage coupled with a composite bed heat release integrated device, and achieves multi-stage heat release through the composite bed. It has three operating control modes: heat storage, parallel heat storage and release, and heat release.

[0041] Finally, it should be noted that the above embodiments 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 with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A solid particle fixed bed heat storage and composite bed heat release system driven by valley electricity / abandoned electricity, characterized in that: include: An electrical energy storage system and a thermal energy release system, wherein the electrical energy storage system is connected to the thermal energy release system, wherein: The fixed-bed heat storage coupled composite bed heat release integrated device (3) in the electric energy storage system utilizes the abandoned electricity from the new energy power generation system (1) or the off-peak electricity of the power grid (2) as input energy to heat the fine solid particles in the fixed-bed heat storage coupled composite bed heat release integrated device (3), thereby realizing efficient thermal energy storage of the fixed-bed solid particles; The high-temperature air outputted from the fixed-bed heat storage coupled composite bed heat release integrated device (3) in the heat energy release system is converted into hot water, hot air and steam using an air-water / air-air composite heat exchanger (7) and an evaporative heat exchanger (8) to realize the release of heat energy.

2. The solid particle fixed bed heat storage and composite bed heat release system driven by valley power / abandoned power according to claim 1 is characterized in that: The fixed-bed heat storage coupled composite bed heat release integrated device (3) is filled with fine solid particles with a particle size of 0.02 mm to 0.15 mm. During the electric energy storage stage, the filling height and fullness of the solid particles and the electric heating power are adjusted to control the heat storage rate and efficiency. During the heat release stage, the air flow rate flowing through the fixed-bed heat storage coupled composite bed heat release integrated device (3) is adjusted to control the heat release rate and efficiency.

3. The solid particle fixed bed heat storage and composite bed heat release system driven by valley power / abandoned power according to claim 1 is characterized in that: The electric energy storage system comprises: a new energy power generation system (1), a power grid (2) and a fixed bed heat storage coupled composite bed heat release integrated device (3), wherein: The new energy power generation system (1) and the power grid (2) are respectively connected to a fixed bed heat storage coupled composite bed heat release integrated device (3). The fixed bed heat storage coupled composite bed heat release integrated device (3) contains an electric heater and a heat exchange coil. The abandoned electricity generated in the new energy power generation system (1) or the valley electricity generated in the power grid (2) is used as input energy to heat the room-temperature solid particles filled in the fixed bed heat storage coupled composite bed heat release integrated device (3) into high-temperature solid particles.

4. The solid particle fixed bed heat storage and composite bed heat release system driven by valley power / abandoned power according to claim 1 is characterized in that: The new energy power generation system (1) is connected to the power grid (2). When the power grid demand is at its peak, the new energy power generation system (1) sends the generated electricity to the power grid (2).

5. The solid particle fixed bed heat storage and composite bed heat release system driven by valley power / abandoned power according to claim 1 is characterized in that: The heat energy release system comprises: a fixed bed heat storage coupled composite bed heat release integrated device (3), a fan / air compressor (4), a water storage tank (5), a filter device (6), an air-water / air-air composite heat exchanger (7) and an evaporative heat exchanger (8), wherein: One end of the fan / air compressor (4) is connected to the fixed bed heat storage coupled composite bed heat release integrated device (3), and is used to input the normal temperature air after the pressure increase output by the fan / air compressor (4) into the fixed bed heat storage coupled composite bed heat release integrated device (3), and to exchange heat with the high temperature particles in the fixed bed heat storage coupled composite bed heat release integrated device (3), thereby generating high temperature air with impurities; the other end of the fan / air compressor (4) is connected to the air-water / air-air composite heat exchanger (7), and is used to input the normal temperature air after the pressure increase output by the fan / air compressor (4) into the air-water / air-air composite heat exchanger (7); One end of the filtering device (6) is connected to the fixed bed heat storage coupled composite bed heat release integrated device (3), and the other end is connected to the air-water / air-air composite heat exchanger (7) and the evaporation heat exchanger (8), respectively, for purifying impurities in the high-temperature air output by the fixed bed heat storage coupled composite bed heat release integrated device (3); The water storage tank (5) is connected to the air-water / air-air composite heat exchanger (7) and is used to input the normal temperature water stored in the water storage tank (5) into the air-water / air-air composite heat exchanger (7); The gas-water / gas-gas composite heat exchanger (7) is connected to the evaporative heat exchanger (8) and is used to input the hot water output from the gas-water / gas-gas composite heat exchanger (7) into the evaporative heat exchanger (8); The air-water / air-air composite heat exchanger (7) uses the purified high-temperature air output by the filter device (6) and the medium-temperature air output by the evaporative heat exchanger (8) as input heat sources; the purified high-temperature air output by the filter device (6) and the medium-temperature air output by the evaporative heat exchanger (8) perform heat exchange with the pressurized normal-temperature air output by the fan / air compressor (4) and the normal-temperature water output by the water storage tank (5) in the air-water / air-air composite heat exchanger (7), and outputs hot water and hot air; The evaporative heat exchanger (8) uses the purified high-temperature air output by the filter device (6) as an input heat source; the purified high-temperature air output by the filter device (6) exchanges heat with the hot water output by the air-water / air-air composite heat exchanger (7) in the evaporative heat exchanger (8), and outputs steam and medium-temperature air; the medium-temperature air output by the evaporative heat exchanger (8) is input to the air-water / air-air composite heat exchanger (7).

6. The solid particle fixed bed heat storage and composite bed heat release system driven by valley power / abandoned power according to claim 5 is characterized in that: The hot water outputted by the gas-water / gas-gas composite heat exchanger (7) is used as the input of a general place heating device (9); the hot air outputted by the gas-water / gas-gas composite heat exchanger (7) can be used as the input of an electrical equipment heating device (10) and can also be discharged into the air; the steam outputted by the evaporative heat exchanger (8) can be used for heating or industrial production.

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