Compressed air system waste heat cross-season storage device and method based on solid state pressing and clamping effect

Abstract

The invention belongs to the technical field of compressed air energy storage, and particularly relates to a compressed air system waste heat cross-seasonal storage device and method based on the solid-state compression clamping effect, and the device comprises an air compression loop, a compression heat storage loop and a compression heat release loop. According to the invention, compression heat is recovered for heating the card pressing material, the lattice structure of the material is changed, and the compression heat energy is stored in the card pressing material; when heat supply is needed, certain pressure is applied to the pressing and clamping material, the lattice structure of the material recovers to the original state, and a large amount of heat energy is released. By means of the system, cross-season and long-time storage of heat can be achieved, heat energy can be controllably released according to different heat using requirements, waste heat recycling is achieved, and the energy utilization rate is effectively increased.

Description

Technical Field

[0001] The present invention belongs to the technical field of compressed air energy storage, and in particular relates to a cross-seasonal storage device and method for waste heat of a compressed air system based on a solid-state compression effect. Background Art

[0002] The air compression process generates a large amount of compression heat, which is usually recovered for heating. However, heating demand only occurs in winter, which results in the compression heat in other seasons (spring, summer, and autumn) being usually wasted, making the recovery efficiency of heat energy low. This phenomenon also occurs in the fields of industrial waste heat and solar energy utilization, which urgently need to store and utilize heat energy across seasons.

[0003] In recent years, researchers have found that the entropy change of some compression materials can reach ~100 J / (kg·K). In particular, plastic crystal compression materials with a glass phase have the characteristic of being able to actively control heat release driven by tiny pressure. This provides a new method for the recovery and storage of compression heat in the air compression process, which is conducive to better improving the utilization efficiency of waste heat, and is expected to achieve efficient recovery, stable storage, long-distance transportation and controllable reuse of low-grade waste heat. Summary of the invention

[0004] Based on the above deficiencies in the prior art, the purpose of the present invention is to provide a cross-seasonal storage device and method for waste heat of a compressed air system based on the solid-state compression effect, which solves the problem of low utilization rate of low-grade compression heat and realizes the cross-seasonal storage and utilization of thermal energy.

[0005] To achieve the above object, the present invention adopts the following technical solutions: A cross-seasonal storage device for waste heat of a compressed air system based on a solid-state compression effect, comprising an air compression circuit, a compression heat storage circuit and a compression heat release circuit; The air compression circuit is used to compress the ambient air in stages and store the compressed air in a compressed air storage tank for use by industrial users; The compression heat storage circuit transports the compression heat generated by the staged compression of the air to the heat storage device for storage through the heat exchange fluid circulating therein; The compression heat release circuit extracts the heat energy stored in the heat storage device and the compression heat energy generated by the compressed air through the heat exchange fluid and supplies them to users.

[0006] Further, the air compression circuit includes a first-stage compressor, a first cooler, a second-stage compressor, a second cooler, a compressed air storage tank, and an industrial user; The inlet end of the first-stage compressor is used to receive ambient air, the outlet end of the first-stage compressor is connected to the first inlet end of the first cooler, the first outlet end of the first cooler is connected to the inlet end of the second-stage compressor, the outlet end of the second-stage compressor is connected to the first inlet end of the second cooler, the first outlet end of the second cooler is connected to the inlet end of the compressed air storage tank, and the outlet end of the compressed air storage tank is connected to the industrial user.

[0007] Further, the compression heat storage circuit includes a first cooler, a second cooler, a first circulation pump, a first three-way valve, a second three-way valve, a third butterfly valve, a heat storage device and a fourth butterfly valve; The inlet end of the first circulation pump is connected to the inlet end of the first three-way valve, the first outlet end of the first three-way valve is connected to the second inlet end of the second cooler, the second outlet end of the first three-way valve is connected to the second inlet end of the first cooler, the second outlet end of the first cooler is connected to the first inlet end of the second three-way valve, the second outlet end of the second cooler is connected to the second inlet end of the second three-way valve, the outlet end of the second three-way valve is connected to the inlet end of the third butterfly valve, the outlet end of the third butterfly valve is connected to the inlet end of the heat storage device, the outlet end of the heat storage device is connected to the inlet end of the fourth butterfly valve, and the outlet end of the fourth butterfly valve is connected to the inlet end of the first circulation pump.

[0008] Further, the compression heat release circuit includes a first cooler, a second cooler, a first circulation pump, a first three-way valve, a second three-way valve, a first butterfly valve, a user heating unit, a second butterfly valve, a heat storage device, a fifth butterfly valve, a second circulation pump and a sixth butterfly valve; The inlet end of the first circulation pump is connected to the inlet end of the first three-way valve, the first outlet end of the first three-way valve is connected to the second inlet end of the second cooler, the second outlet end of the first three-way valve is connected to the second inlet end of the first cooler, the second outlet end of the first cooler is connected to the first inlet end of the second three-way valve, the second outlet end of the second cooler is connected to the second inlet end of the second three-way valve, the outlet end of the second three-way valve is connected to the inlet end of the first butterfly valve, the outlet end of the first butterfly valve is connected to the first inlet end of the user heating unit, the first outlet end of the user heating unit is connected to the inlet end of the second butterfly valve, and the outlet end of the second butterfly valve is connected to the inlet end of the first circulation pump; The outlet end of the heat storage device is connected to the inlet end of the fifth butterfly valve, the outlet end of the fifth butterfly valve is connected to the second outlet end of the user heating unit, the second outlet end of the user heating unit is connected to the inlet end of the second circulation pump, the outlet end of the second circulation pump is connected to the inlet end of the sixth butterfly valve, and the outlet end of the sixth butterfly valve is connected to the inlet end of the heat storage device.

[0009] Furthermore, the heat storage device comprises a front head, a pressure driver, a front tube sheet, a barrel (22), a baffle, a rear tube sheet, a rear head, a heat exchange tube and a pressing material; An inlet and an outlet are respectively provided on one side of the cylinder body, baffles are evenly spaced on the cylinder body, a front tube sheet and a rear tube sheet are respectively provided at the front end and the rear end of the cylinder body, a plurality of heat exchange tubes are fixedly installed between the front tube sheet and the rear tube sheet, and each heat exchange tube is filled with a compression material; a pressure driver is provided at the front end of the heat exchange tube, a front head is provided on the front side of the front tube sheet, and a rear head is provided on the rear side of the rear tube sheet, and the entire heat storage device is sealed by the front head and the rear head.

[0010] Furthermore, the compression material includes but is not limited to compression materials with a plastic crystal glass phase such as AMP and meta-carborane.

[0011] The present invention also provides a method for storing waste heat of a compressed air system across seasons based on a solid-state compression effect, which uses a compressed air system waste heat across seasons storage device based on a solid-state compression effect as described above, and the storage method comprises: The air compression process and compression heat storage process occurs during the summer period: Air compression process: ambient air is compressed by the first-stage compressor and then enters the first cooler to release the compression heat energy; the compressed air is further compressed by the second-stage compressor and then enters the second cooler to release the compression heat energy; finally, the compressed air enters the compressed air storage tank and is supplied to industrial users; Compression heat storage process: the first butterfly valve, the second butterfly valve, the fifth butterfly valve and the sixth butterfly valve are closed, and the third butterfly valve and the fourth butterfly valve are opened; the first circulation pump is started, and the heat exchange fluid flows through the first cooler and the second cooler to extract heat energy, and flows into the heat storage device through the second three-way valve and the third butterfly valve to store the compression heat energy in the compression material; then, the heat exchange fluid returns to the first circulation pump through the fourth butterfly valve.

[0012] Furthermore, the heat exchange fluid flows through the energy storage device, and the baffles make the heat exchange fluid flow in a zigzag manner in the barrel, fully releasing heat energy, better heat exchange with the card pressing material, and raising the material temperature. Under high temperature conditions, the material crystal system changes from the oblique cubic system to the cubic system. After cooling to room temperature, under room temperature conditions, it changes from the cubic system to the supercooled cubic system.

[0013] Furthermore, the air compression process and compression heat release process occur during the winter period: Air compression process: ambient air is compressed by the first-stage compressor and then enters the first cooler to release the compression heat energy; the compressed air is further compressed by the second-stage compressor and then enters the second cooler to release the compression heat energy; finally, the compressed air enters the compressed air storage tank and is supplied to industrial users; Compression heat release process: the fifth butterfly valve and the sixth butterfly valve are opened, and the third butterfly valve and the fourth butterfly valve are closed; the pressure driver is started, and pressure is applied to the compression material, and the material temperature increases; the second circulation pump is started, and the heat exchange fluid enters the heat storage device through the sixth butterfly valve, exchanges heat with the compression material, and the heat exchange fluid temperature increases, and flows into the user's heating unit through the fifth butterfly valve, releasing heat to provide heating to the user, and the heat exchange fluid temperature decreases, and returns to the heat storage device through the second circulation pump and the sixth butterfly valve; At this time, the heat stored in the heat storage device is released, the first butterfly valve and the second butterfly valve are opened; the first circulation pump is started, and the heat exchange fluid flows through the first cooler and the second cooler to extract the compressed heat energy, flows into the user's heating unit through the second three-way valve and the first butterfly valve, releases heat to provide heating to the user, and then flows through the second butterfly valve back to the first circulation pump.

[0014] Furthermore, when the heat storage device needs to release the stored heat, the pressure driver starts to apply pressure to the compression material in the heat exchange tube, causing the material to undergo a solid-solid phase change from a supercooled cubic system to an orthorhombic system, while releasing heat. The material temperature rises, and the heat exchange fluid flows through the heat storage device to exchange heat with the material, extracting the stored compressed heat energy to provide heating to users.

[0015] From the above, compared with the prior art, the present invention has the following beneficial effects: 1. The present invention recovers and stores the compression heat generated by compressed air through the lattice change of the compression card material for winter heating, thereby realizing the cross-seasonal recycling of waste heat and effectively improving energy utilization.

[0016] 2. The present invention uses a plastic crystal compression material with a glass phase to achieve cross-season, long-distance, and long-term heat storage without any insulation measures.

[0017] 3. The present invention uses a plastic crystal pressing material with a glass phase, which has high pressure sensitivity and can release heat at a low driving pressure; wherein the heat storage device can release heat energy in a controllable manner according to different heat requirements.

[0018] 4. The present invention can realize cross-seasonal and long-term storage of heat, and can controllably release heat energy according to different heat requirements, thereby realizing the recovery and reuse of waste heat and effectively improving energy utilization.

[0019] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following is a detailed description in combination with the preferred embodiments and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0021] Figure 1 It is a schematic diagram of the structure of the present invention.

[0022] In the figure: 1-first stage compressor, 2-first cooler, 3-second stage compressor, 4-second cooler, 5-compressed air storage tank, 6-industrial user, 7-first circulating pump, 8-first three-way valve, 9-second three-way valve, 10-first butterfly valve, 11-user heating unit, 12-second butterfly valve, 13-third butterfly valve, 14-heat storage device, 15-fourth butterfly valve, 16-fifth butterfly valve, 17-second circulating pump, 18-sixth butterfly valve, 19-front head, 20-pressure driver, 21-front tube sheet, 22-barrel, 23-baffle, 24-rear tube sheet, 25-rear head, 26-heat exchange tube, 27-pressing material. DETAILED DESCRIPTION

[0024] The following is a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings, which is a part of this specification and illustrates the principles of the present invention through examples. Other aspects, features and advantages of the present invention will become clear from the detailed description. In the referenced drawings, the same or similar components in different figures are represented by the same reference numerals.

[0025] Aiming at the problem that the simple recovery and storage adopted by the current compressed air energy storage system leads to waste of compressed heat energy and reduces the utilization rate of heat energy, the present invention provides a cross-seasonal storage device and method for waste heat of compressed air system based on solid-state compression effect, which stores and reuses low-quality compressed heat energy to achieve efficient utilization of heat.

[0026] The present invention includes an air compression circuit, a compression heat storage circuit and a compression heat release circuit. In the summer period, the ambient air is compressed by the first-stage compressor 1, and then enters the first cooler 2 to release the compression heat energy; the compressed air is further compressed by the second-stage compressor 3, and then enters the second cooler 4 to release the compression heat energy; finally, the compressed air enters the compressed air storage tank 5 and is supplied to the industrial user 6. The first-stage compression heat and the second-stage compression heat are stored in the heat storage device 14 through the compression heat storage circuit. In the winter period, the heating demand is relatively large, and the compression heat generated by the compressed air will be directly used for heating through the compression heat release circuit, and the heat energy stored in the heat storage device 14 will be released for heating users.

[0027] The present invention effectively improves energy utilization by recovering and storing low-grade compressed heat energy for heating. In addition, the use of compression material 27 in the heat storage device 14 allows heat to be stored for a long time across seasons, effectively resolving the contradiction between energy supply and demand in different seasons.

[0028] In one embodiment of the present invention, a cross-season storage device for waste heat of a compressed air system based on a solid-state compression effect is provided. In this embodiment, as shown in the figure, the device includes: an air compression circuit, a compression heat storage circuit, and a compression heat release circuit.

[0029] An air compression circuit is used to compress ambient air in stages and store the compressed air in a compressed air storage tank 5 for supply to industrial users 6; A compression heat storage loop, in which the heat of compression generated by staged compression of air is transported to the heat storage device 14 for storage through a heat exchange fluid circulating therein; The compression heat release circuit extracts the heat energy stored in the heat storage device 14 and the compression heat energy generated by the compressed air through the heat exchange fluid and supplies them to users.

[0030] In the above embodiment, the air compression circuit comprises at least two stages of compression and cooling structures connected in series and a compressed air storage tank 5. Each stage of the compression and cooling structure comprises a compressor and a cooler connected in series.

[0031] After being compressed and cooled by the compressors and coolers in the compression and cooling structures at various levels, the ambient air enters the compressed air storage tank 5 for storage so as to be supplied to the industrial users 6 for use.

[0032] In this embodiment, optionally, Figure 1 As shown, a two-stage compression and cooling structure is adopted, including: a first-stage compressor 1, a first cooler 2, a second-stage compressor 3, a second cooler 4, a compressed air storage tank 5 and an industrial user 6.

[0033] Specifically, the inlet end of the first-stage compressor 1 is used to receive ambient air, the outlet end of the first-stage compressor 1 is connected to the first inlet end of the first cooler 2, the first outlet end of the first cooler 2 is connected to the inlet end of the second-stage compressor 3, the outlet end of the second-stage compressor 3 is connected to the first inlet end of the second cooler 4, the first outlet end of the second cooler 4 is connected to the inlet end of the compressed air storage tank 5, and the outlet end of the compressed air storage tank 5 is connected to the industrial user 6.

[0034] In the above embodiment, the air compression circuit is mainly used to compress the ambient air in stages and store the compressed air in the compressed air storage tank 5 for supply to the industrial user 6 .

[0035] In this embodiment, optionally, Figure 1 As shown, the compression heat storage circuit transports the compression heat generated by the staged compression of air to the heat storage device 14 for storage, and includes: a first cooler 2, a second cooler 4, a first circulation pump 7, a first three-way valve 8, a second three-way valve 9, a third butterfly valve 13, a heat storage device 14 and a fourth butterfly valve 15.

[0036] Specifically, the inlet end of the first circulation pump 7 is connected to the inlet end of the first three-way valve 8, the first outlet end of the first three-way valve 8 is connected to the second inlet end of the second cooler 4, the second outlet end of the first three-way valve 8 is connected to the second inlet end of the first cooler 2, the second outlet end of the first cooler 2 is connected to the first inlet end of the second three-way valve 9, the second outlet end of the second cooler 4 is connected to the second inlet end of the second three-way valve 9, the outlet end of the second three-way valve 9 is connected to the inlet end of the third butterfly valve 13, the outlet end of the third butterfly valve 13 is connected to the inlet end of the heat storage device 14, the outlet end of the heat storage device 14 is connected to the inlet end of the fourth butterfly valve 15, and the outlet end of the fourth butterfly valve 15 is connected to the inlet end of the first circulation pump 7.

[0037] In the above embodiment, the compression heat storage circuit can store excess compression heat for a long time and release the heat to provide heating to users when needed.

[0038] In the above embodiment, the compression heat storage circuit and the air compression circuit share the first cooler 2 and the second cooler 4 .

[0039] In this embodiment, optionally, Figure 1 As shown, the compression heat release circuit supplies the heat energy stored in the heat storage device 14 and the compression heat energy of the compressed air to the user, including: a first cooler 2, a second cooler 4, a first circulation pump 7, a first three-way valve 8, a second three-way valve 9, a first butterfly valve 10, a user heating unit 11, a second butterfly valve 12, a heat storage device 14, a fifth butterfly valve 16, a second circulation pump 17 and a sixth butterfly valve 18.

[0040] Specifically, the inlet end of the first circulation pump 7 is connected to the inlet end of the first three-way valve 8, the first outlet end of the first three-way valve 8 is connected to the second inlet end of the second cooler 4, the second outlet end of the first three-way valve 8 is connected to the second inlet end of the first cooler 2, the second outlet end of the first cooler 2 is connected to the first inlet end of the second three-way valve 9, the second outlet end of the second cooler 4 is connected to the second inlet end of the second three-way valve 9, the outlet end of the second three-way valve 9 is connected to the inlet end of the first butterfly valve 10, the outlet end of the first butterfly valve 10 is connected to the first inlet end of the user heating unit 11, the first outlet end of the user heating unit 11 is connected to the inlet end of the second butterfly valve 12, and the outlet end of the second butterfly valve 12 is connected to the inlet end of the first circulation pump 7.

[0041] Among them, the heat storage device 14 is connected to the inlet end of the fifth butterfly valve 16, the outlet end of the fifth butterfly valve 16 is connected to the second inlet end of the user heating unit 11, the second outlet end of the user heating unit 11 is connected to the inlet end of the second circulation pump 17, the outlet end of the second circulation pump 17 is connected to the inlet end of the sixth butterfly valve 18, and the outlet end of the sixth butterfly valve 18 is connected to the inlet end of the heat storage device 14.

[0042] In the above embodiment, the compression heat release circuit directly uses the excess compression heat for heating, and the stored compression heat can be selectively released for heating.

[0043] In the above embodiment, the compression heat release circuit shares the first cooler 2 and the second cooler 4 with the air compression circuit; and shares the first cooler 2, the second cooler 4, the first circulation pump 7, the first three-way valve 8, the second three-way valve 9 and the heat storage device 14 with the compression heat storage circuit.

[0044] Specifically, the heat storage device 14 includes: a front head 19, a pressure driver 20, a front tube sheet 21, a barrel 22, a baffle 23, a rear tube sheet 24, a rear head 25, a heat exchange tube 26 and a pressing material 27.

[0045] Among them, an inlet and an outlet are respectively provided on one side of the barrel 22, baffles 23 are evenly spaced on the barrel 22, a front tube sheet 21 and a rear tube sheet 24 are respectively provided at the front end and the rear end of the barrel 22, a plurality of heat exchange tubes 26 are fixedly installed between the front tube sheet 21 and the rear tube sheet 24, and each heat exchange tube 26 is filled with a compression material 27; a pressure driver 20 is provided at the front end of the heat exchange tube 26, a front head 19 is provided on the front side of the front tube sheet 21, and a rear head 25 is provided on the rear side of the rear tube sheet 24, and the entire heat storage device 14 is sealed by the front head 19 and the rear head 25.

[0046] In one embodiment of the present invention, a method for storing waste heat in a compressed air system across seasons based on the solid-state compression effect is provided, and the method is implemented based on the system in the above embodiments. In this embodiment, the method includes an air compression process, a compression heat storage process, and a compression heat release process: 1) The air compression process and compression heat storage process occur in the summer period and include the following steps: 11) The ambient air is compressed by the two-stage compression and cooling structure to become compressed air and release heat energy; the compressed air enters the compressed air storage tank 5 and is supplied to the industrial user 6; 12) The heat energy generated by the compressed air is extracted by the heat exchange fluid circulating in the compressed heat storage circuit through the coolers at each stage, and the heat energy is stored in the compression material 27 in the heat exchange tube 26 when flowing through the heat storage device 14.

[0047] 2) The air compression process and compression heat release process occur in the winter period and include the following steps: 21) At this time, the compression heat energy generated by the air compression process will directly provide heating to users; 22) The pressure driver 20 in the heat storage device is started, applying pressure to the compression material 27 in the heat exchange tube 26. The material releases heat and the temperature rises. The heat exchange fluid extracts the heat to provide heat to the user.

[0048] In this embodiment, a two-stage compression cooling structure and a heat storage device are taken as an example for detailed description. Specifically, the cross-seasonal storage method of waste heat of a compressed air system based on the solid-state compression effect is as follows: 1) The air compression process and compression heat storage process occur during the summer period: Air compression process: ambient air is compressed by the first-stage compressor 1, and then enters the first cooler 2 to release the compression heat energy; the compressed air is further compressed by the second-stage compressor 3, and then enters the second cooler 4 to release the compression heat energy; finally, the compressed air enters the compressed air storage tank 5 and is supplied to industrial users 6.

[0049] Compression heat storage process: the first butterfly valve 10, the second butterfly valve 12, the fifth butterfly valve 16 and the sixth butterfly valve 18 are closed, and the third butterfly valve 13 and the fourth butterfly valve 15 are opened; the first circulation pump 7 is started, and the heat exchange fluid flows through the first cooler 2 and the second cooler 4 to extract heat energy, and flows into the heat storage device 14 through the second three-way valve 9 and the third butterfly valve 13 to store the compression heat energy in the compression material 27; then, the heat exchange fluid returns to the first circulation pump 7 through the fourth butterfly valve 15.

[0050] Specifically, the heat exchange fluid flows through the energy storage device 14, and the baffle 23 makes the heat exchange fluid flow in a zigzag manner in the barrel 22, fully releasing heat energy, and better heat exchange with the compression material 27, so that the material temperature increases. Under high temperature conditions, the material crystal system changes from an orthorhombic system to a cubic system. After cooling to room temperature, under room temperature conditions, the material changes from a cubic system to a supercooled cubic system.

[0051] 2) The air compression process and compression heat release process occur in the winter period: Air compression process: ambient air is compressed by the first-stage compressor 1, and then enters the first cooler 2 to release the compression heat energy; the compressed air is further compressed by the second-stage compressor 3, and then enters the second cooler 4 to release the compression heat energy; finally, the compressed air enters the compressed air storage tank 5 and is supplied to industrial users 6.

[0052] Compression heat release process: the fifth butterfly valve 16 and the sixth butterfly valve 18 are opened, and the third butterfly valve 13 and the fourth butterfly valve 15 are closed; the pressure driver 20 is started, and pressure is applied to the compression material 27, and the material temperature increases; the second circulation pump 17 is started, and the heat exchange fluid enters the heat storage device 14 through the sixth butterfly valve 18, exchanges heat with the compression material 27, and the temperature of the heat exchange fluid increases. It flows into the user heating unit 11 through the fifth butterfly valve 16, releases heat to provide heating to the user, and the temperature of the heat exchange fluid decreases, and returns to the heat storage device 14 through the second circulation pump 17 and the sixth butterfly valve 18.

[0053] At this time, the heat stored in the heat storage device 14 is also released, and the first butterfly valve 10 and the second butterfly valve 12 are opened; the first circulation pump 7 is started, and the heat exchange fluid flows through the first cooler 2 and the second cooler 4 to extract the compression heat energy, and flows into the user heating unit 11 through the second three-way valve 9 and the first butterfly valve 10, releasing heat to provide heating to the user, and then flows through the second butterfly valve 12 to return to the first circulation pump 7.

[0054] Among them, when the heat storage device 14 needs to release the stored heat, the pressure driver 20 is started to apply pressure to the compression material 27 in the heat exchange tube 26, and the material undergoes a solid-solid phase change from a supercooled cubic system to an orthorhombic system. At the same time, heat is released, the material temperature rises, and the heat exchange fluid flows through the heat storage device to exchange heat with the material, extracting the stored compressed heat energy to provide heating to the user.

[0055] In summary, the present invention can realize cross-seasonal and long-term storage of heat, and can release thermal energy in a controllable manner according to different heat requirements, thereby realizing the recovery and reuse of waste heat and effectively improving energy utilization.

[0056] The above is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and changes can be made without departing from the principle of the present invention, and these improvements and changes are also regarded as the protection scope of the present invention.

Claims

1. A cross-seasonal storage device for waste heat of a compressed air system based on solid-state compression effect, characterized in that: It includes an air compression circuit, a compression heat storage circuit and a compression heat release circuit; The air compression circuit is used to compress the ambient air in stages and store the compressed air in a compressed air storage tank (5) for supply to industrial users (6); The compression heat storage circuit transports the compression heat generated by the staged compression of the air to the heat storage device (14) for storage through the heat exchange fluid circulating therein; The compression heat release circuit extracts the heat energy stored in the heat storage device (14) and the compression heat energy generated by the compressed air through the heat exchange fluid and supplies them to users.

2. A cross-seasonal storage device for waste heat of a compressed air system based on solid-state compression effect as claimed in claim 1, characterized in that: The air compression circuit comprises a first-stage compressor (1), a first cooler (2), a second-stage compressor (3), a second cooler (4), a compressed air storage tank (5) and an industrial user (6); The inlet end of the first-stage compressor (1) is used to receive ambient air, the outlet end of the first-stage compressor (1) is connected to the first inlet end of the first cooler (2), the first outlet end of the first cooler (2) is connected to the inlet end of the second-stage compressor (3), the outlet end of the second-stage compressor (3) is connected to the first inlet end of the second cooler (4), the first outlet end of the second cooler (4) is connected to the inlet end of the compressed air storage tank (5), and the outlet end of the compressed air storage tank (5) is connected to the industrial user (6).

3. The cross-season storage device for waste heat of a compressed air system based on solid-state compression effect according to claim 1, characterized in that: The compression heat storage circuit comprises a first cooler (2), a second cooler (4), a first circulation pump (7), a first three-way valve (8), a second three-way valve (9), a third butterfly valve (13), a heat storage device (14) and a fourth butterfly valve (15); The inlet end of the first circulation pump (7) is connected to the inlet end of the first three-way valve (8), the first outlet end of the first three-way valve (8) is connected to the second inlet end of the second cooler (4), the second outlet end of the first three-way valve (8) is connected to the second inlet end of the first cooler (2), the second outlet end of the first cooler (2) is connected to the first inlet end of the second three-way valve (9), the second outlet end of the second cooler (4) is connected to the second inlet end of the second three-way valve (9), the outlet end of the second three-way valve (9) is connected to the inlet end of the third butterfly valve (13), the outlet end of the third butterfly valve (13) is connected to the inlet end of the heat storage device (14), the outlet end of the heat storage device (14) is connected to the inlet end of the fourth butterfly valve (15), and the outlet end of the fourth butterfly valve (15) is connected to the inlet end of the first circulation pump (7).

4. The cross-season storage device for waste heat of a compressed air system based on solid-state compression effect according to claim 1, characterized in that: The compression heat release circuit comprises a first cooler (2), a second cooler (4), a first circulation pump (7), a first three-way valve (8), a second three-way valve (9), a first butterfly valve (10), a user heating unit (11), a second butterfly valve (12), a heat storage device (14), a fifth butterfly valve (16), a second circulation pump (17) and a sixth butterfly valve (18); The inlet end of the first circulation pump (7) is connected to the inlet end of the first three-way valve (8), the first outlet end of the first three-way valve (8) is connected to the second inlet end of the second cooler (4), the second outlet end of the first three-way valve (8) is connected to the second inlet end of the first cooler (2), the second outlet end of the first cooler (2) is connected to the first inlet end of the second three-way valve (9), the second outlet end of the second cooler (4) is connected to the second inlet end of the second three-way valve (9), the outlet end of the second three-way valve (9) is connected to the inlet end of the first butterfly valve (10), the outlet end of the first butterfly valve (10) is connected to the first inlet end of the user heating unit (11), the first outlet end of the user heating unit (11) is connected to the inlet end of the second butterfly valve (12), and the outlet end of the second butterfly valve (12) is connected to the inlet end of the first circulation pump (7); The outlet end of the heat storage device (14) is connected to the inlet end of the fifth butterfly valve (16), the outlet end of the fifth butterfly valve (16) is connected to the second outlet end of the user heating unit (11), the second outlet end of the user heating unit (11) is connected to the inlet end of the second circulation pump (17), the outlet end of the second circulation pump (17) is connected to the inlet end of the sixth butterfly valve (18), and the outlet end of the sixth butterfly valve (18) is connected to the inlet end of the heat storage device (14).

5. The cross-season storage device for waste heat of a compressed air system based on solid-state compression effect according to claim 1, characterized in that: The heat storage device (14) comprises a front end cover (19), a pressure driver (20), a front tube sheet (21), a barrel (22), a baffle (23), a rear tube sheet (24), a rear end cover (25), a heat exchange tube (26), and a compression material (27); An inlet and an outlet are respectively provided on one side of the barrel (22); baffles (23) are evenly spaced on the barrel (22); a front tube sheet (21) and a rear tube sheet (24) are respectively provided at the front end and the rear end of the barrel (22); a plurality of heat exchange tubes (26) are fixedly installed between the front tube sheet (21) and the rear tube sheet (24); each heat exchange tube (26) is filled with a compression material (27); a pressure driver (20) is provided at the front end of the heat exchange tube (26); a front end cover (19) is provided on the front side of the front tube sheet (21); a rear end cover (25) is provided on the rear side of the rear tube sheet (24); and the entire heat storage device (14) is sealed by the front end cover (19) and the rear end cover (25).

6. A cross-seasonal storage device for waste heat of a compressed air system based on solid-state compression effect as claimed in claim 5, characterized in that: The compression material (27) is a compression material composed of AMP and meta-carborane having a plastic crystal glass phase.

7. A method for storing waste heat of a compressed air system across seasons based on a solid-state compression effect, which adopts a device for storing waste heat of a compressed air system across seasons based on a solid-state compression effect as claimed in any one of claims 1 to 6, characterized in that: The storage method comprises: The air compression process and compression heat storage process occurs during the summer period: Air compression process: ambient air is compressed by the first-stage compressor (1) and then enters the first cooler (2) to release the compression heat energy; the compressed air is further compressed by the second-stage compressor (3) and then enters the second cooler (4) to release the compression heat energy; finally, the compressed air enters the compressed air storage tank (5) and is supplied to industrial users (6); Compression heat storage process: the first butterfly valve (10), the second butterfly valve (12), the fifth butterfly valve (16) and the sixth butterfly valve (18) are closed, and the third butterfly valve (13) and the fourth butterfly valve (15) are opened; the first circulation pump (7) is started, and the heat exchange fluid flows through the first cooler (2) and the second cooler (4) to extract heat energy, and then flows into the heat storage device (14) through the second three-way valve (9) and the third butterfly valve (13), and stores the compression heat energy in the compression material (27); then, the heat exchange fluid returns to the first circulation pump (7) through the fourth butterfly valve (15).

8. A method for storing waste heat from a compressed air system across seasons based on solid-state compression effect as claimed in claim 7, characterized in that: The heat exchange fluid flows through the energy storage device (14), and the baffle (23) causes the heat exchange fluid to flow in a zigzag manner in the barrel (22), thereby fully releasing heat energy and being able to exchange heat with the compression material (27), thereby increasing the temperature of the material. Under high temperature conditions, the crystal system of the material changes from an orthorhombic system to a cubic system; after cooling to room temperature, under room temperature conditions, the crystal system changes from a cubic system to a supercooled cubic system.

9. A method for storing waste heat from a compressed air system across seasons based on solid-state compression effect as claimed in claim 7, characterized in that: The storage method further comprises: The air compression process and the heat of compression release process occur during the winter period: Air compression process: ambient air is compressed by the first-stage compressor (1) and then enters the first cooler (2) to release the compression heat energy; the compressed air is further compressed by the second-stage compressor (3) and then enters the second cooler (4) to release the compression heat energy; finally, the compressed air enters the compressed air storage tank (5) and is supplied to industrial users (6); Compression heat release process: the fifth butterfly valve (16) and the sixth butterfly valve (18) are opened, and the third butterfly valve (13) and the fourth butterfly valve (15) are closed; the pressure driver (20) is started to apply pressure to the compression material (27), and the material temperature increases; the second circulation pump (17) is started, and the heat exchange fluid enters the heat storage device (14) through the sixth butterfly valve (18), exchanges heat with the compression material (27), and the temperature of the heat exchange fluid increases. The heat exchange fluid flows into the user heating unit (11) through the fifth butterfly valve (16), releases heat to provide heating to the user, and the temperature of the heat exchange fluid decreases, and the heat exchange fluid returns to the heat storage device (14) through the second circulation pump (17) and the sixth butterfly valve (18); At this time, the heat stored in the heat storage device (14) is released, and the first butterfly valve (10) and the second butterfly valve (12) are opened; the first circulation pump (7) is started, and the heat exchange fluid flows through the first cooler (2) and the second cooler (4) to extract the compression heat energy, and then flows into the user heating unit (11) through the second three-way valve (9) and the first butterfly valve (10), releasing the heat to provide heating to the user, and then flows through the second butterfly valve (12) and returns to the first circulation pump (7).

10. A method for storing waste heat of a compressed air system across seasons based on solid-state compression effect as claimed in claim 9, characterized in that: When the heat storage device (14) needs to release the stored heat, the pressure driver (20) is started to apply pressure to the compression material (27) in the heat exchange tube (26), causing the material to undergo a solid-solid phase transition from a supercooled cubic system to an orthorhombic system, while releasing heat. The material temperature rises, and the heat exchange fluid flows through the heat storage device to exchange heat with the material, extracting the stored compressed heat energy to provide heating to the user.

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