Direct contact type gas-solid countercurrent heat exchange large-scale solid-phase cold / heat storage system

Abstract

The utility model provides a direct contact type gas-solid countercurrent heat exchange large-scale solid-phase cold / heat storage system which comprises a moving bed heat exchange channel, an inlet for a gas phase heat transfer medium to enter is formed in the lower portion of the moving bed heat exchange channel, and an outlet for the gas phase heat transfer medium to flow out is formed in the upper portion of the moving bed heat exchange channel. The first heat preservation particle tank and the second heat preservation particle tank are used for storing cold / heat storage particles and selectively communicate with the upper portion or the lower portion of the moving bed heat exchange channel, and during heat exchange, the cold / heat storage particles entering the upper portion of the moving bed heat exchange channel move downwards under the action of gravity; a gas-phase heat transfer medium entering the moving bed heat exchange channel from the inlet flows towards the upper portion of the moving bed heat exchange channel, airflow flowing upwards and cold / heat storage particles are subjected to coupled direct contact countercurrent flow heat exchange so as to reduce the gas-solid heat exchange temperature difference, and the airflow obtained after heat exchange flows out from the outlet so as to achieve heat exchange. And the cold / heat accumulation particles after heat exchange fall into a heat preservation particle tank communicated with the lower part of the heat exchange channel of the moving bed downwards.

Description

Technical Field

[0001] The utility model relates to the technical field of large-scale storage, release and utilization of cold / heat energy, and in particular to a large-scale solid-phase cold / heat storage system with direct contact gas-solid countercurrent heat exchange. Background Art

[0002] To adjust the energy structure and alleviate energy shortages, the recovery of cold energy and waste heat from industrial processes has received widespread attention in recent years. This includes the recovery of cold energy from LNG and ethylene, as well as the recovery of waste heat from materials such as slag and graphite in industrial processes. Maximizing the recovery and effective utilization of this energy is of vital importance to my country's energy sector.

[0003] Currently, there are two main large-scale cold / heat storage technologies: one using alkane liquid media for cold / heat storage, and the other using solid-phase particulate matter. However, alkane working media are expensive and flammable, making them difficult to promote. While solid-phase particulate matter is inexpensive, its unique structural design, affected by the dynamic effects of the thermocline, results in low-quality cold / heat storage and low efficiency. Phase change materials are also an option, but are too expensive and lack maturity. These factors hinder the widespread promotion and application of large-scale cold / heat storage technologies.

[0004] When considering large-scale cold / heat storage technologies, performance, economic viability, scalability, safety, environmental friendliness, and technological maturity must all be considered. Currently, no single large-scale cold / heat storage technology meets all of these requirements. Therefore, developing cold / heat storage technologies that guarantee superior performance and meet current economic and environmental requirements is crucial. Utility Model Content

[0005] The purpose of the utility model is to solve the technical problem in the prior art that solid-phase particles, due to their special structural design, are affected by the dynamic effect of the thermocline layer, resulting in low quality of cold / heat energy stored and low efficiency.

[0006] In order to solve the above technical problems, the present invention provides a large-scale solid-phase cold / heat storage system with direct contact gas-solid countercurrent heat exchange, which includes: a moving bed heat exchange channel, the lower part of the moving bed heat exchange channel is provided with an inlet for the gas-phase heat transfer medium to enter, and the upper part is provided with an outlet for the gas-phase heat transfer medium to flow out; a first heat-insulating particle tank and a second heat-insulating particle tank for storing cold / heat storage particles, the first heat-insulating particle tank and the second heat-insulating particle tank can be selectively connected to the upper part or the lower part of the moving bed heat exchange channel, when the first heat-insulating particle tank is connected to the upper part of the moving bed heat exchange channel, the second heat-insulating particle tank is connected to the lower part of the moving bed When the second thermal insulation particle tank is connected to the upper part of the moving bed heat exchange channel, the first thermal insulation particle tank is connected to the lower part of the moving bed. During heat exchange, the cold / hot storage particles entering the upper part of the moving bed heat exchange channel move downward under the action of gravity, and the gaseous heat transfer medium entering the moving bed heat exchange channel from the inlet flows toward the upper part of the moving bed heat exchange channel under the driving force of pressure. The upward-flowing airflow and the cold / hot storage particles are coupled for direct contact countercurrent heat exchange to reduce the gas-solid heat exchange temperature difference. The airflow after heat exchange flows out from the outlet, and the cold / hot storage particles after heat exchange fall downward into the thermal insulation particle tank connected to the lower part of the moving bed heat exchange channel.

[0007] Furthermore, the moving bed heat exchange channel is vertically arranged, and the first heat-insulating particle tank and the second heat-insulating particle tank are both connected to the moving bed heat exchange channel through pipelines.

[0008] Furthermore, the moving bed heat exchange channel is arranged to be inclined, and the first heat-insulating particle tank and the second heat-insulating particle tank are both connected to the moving bed heat exchange channel through pipelines.

[0009] Furthermore, it also includes a vibration device, which acts on the moving bed heat exchange channel.

[0010] Furthermore, there are multiple moving bed heat exchange channels, and the multiple moving bed heat exchange channels are arranged in parallel.

[0011] Furthermore, it also includes a solid distributor arranged at the upper part of the moving bed heat exchange channel and a gas distributor arranged at the lower part of the moving bed heat exchange channel. The cold / heat storage particles enter the multiple moving bed heat exchange channels evenly through the solid distributor, and the gaseous heat transfer medium enters the multiple moving bed heat exchange channels evenly through the gas distributor.

[0012] Furthermore, it also includes a particle valve, which is arranged on the connecting pipe between the moving bed heat exchange channel and the insulation particle tank. The particle valve can control the flow of cold / heat storage particles entering the moving bed heat exchange channel.

[0013] Furthermore, the cold / heat storage particles are inert materials.

[0014] Furthermore, the moving bed heat exchange channel is made of high-strength cold / heat resistant materials such as stainless steel or quartz, and its outer side is wrapped with insulation materials such as glass fiber, aerogel, polymer foam resin, asbestos or rock wool.

[0015] Furthermore, the elevator can selectively control the height of the first insulation particle tank or the second insulation particle tank so that the first insulation particle tank or the second insulation particle tank is located at the upper or lower part of the moving bed heat exchange channel, so as to facilitate the connection of the first insulation particle tank or the second insulation particle tank with the top pipeline or the bottom pipeline of the moving bed heat exchange channel.

[0016] It can be seen from the above technical solution that the beneficial effects of the utility model are:

[0017] Solid-phase particle cold / heat storage medium exchanges heat in a nearly countercurrent manner in the moving bed heat exchange channel. This heat exchange mode has a larger heat transfer area and high heat transfer efficiency. It can also significantly reduce the gas-solid heat exchange temperature difference, improve cold / heat storage efficiency, and obtain higher-quality cold / heat energy storage;

[0018] By setting up two thermal insulation particle tanks, the particles store high-grade cold / heat energy in the second thermal insulation particle tank and low-grade cold / heat energy in the first thermal insulation particle tank. The separate storage completely avoids the dynamic effect of the thermoclimatic layer inside the solid phase cold / heat storage, and has excellent performance.

[0019] The gas distributor and solid distributor make the gas phase heat transfer medium and solid phase cold / heat storage medium in the moving bed heat exchange channel flow evenly, further improving the heat exchange efficiency;

[0020] It uses inert and common solid-phase cold / heat storage materials to store high-quality cold / heat energy. It has low investment cost, high safety factor and is environmentally friendly. It has good universality and is basically suitable for cold / heat energy storage in any temperature zone. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of a large-scale solid-phase cold / heat storage system with direct contact gas-solid countercurrent heat exchange provided in this application. DETAILED DESCRIPTION

[0022] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention is capable of various variations in different embodiments without departing from the scope of the present invention, and that the descriptions and illustrations herein are intended to be illustrative in nature and not to limit the present invention.

[0023] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0024] In order to further illustrate the principle and structure of the present utility model, the preferred embodiments of the present utility model are now described in detail with reference to the accompanying drawings.

[0025] See also Figure 1 , which is a large-scale solid phase cold / heat storage system with direct contact gas-solid countercurrent heat exchange provided in this embodiment, including

[0026] The utility model provides a large-scale cold / heat storage device to solve the problems of low cold / heat energy quality of existing large-scale cold / heat storage technology. Improve the performance and various aspects of large-scale cold / heat storage technologies by solving problems of limited efficiency or danger.

[0027] The utility model uses low-cost solid-phase particles to store high-quality cold / heat energy, reduces system investment, and has good economy.

[0028] The large-scale cold / heat storage device of the utility model with gas-solid countercurrent coupled heat exchange includes a first thermal insulation particle tank 2, a second thermal insulation particle tank 8, a moving bed heat exchange channel 6, a particle valve 4, a gas distributor 7, a solid distributor 5, an elevator 1, and a connecting device 3, wherein the first thermal insulation particle tank 2 is used to store particles with low-grade cold / heat energy, and is wrapped with insulation materials such as glass fiber, aerogel, polymer foam resin, asbestos, rock wool, etc. on the outside of the tank body for insulation, the bottom of the tank is a solid outlet, and the top is a solid inlet, and the solid outlet or solid inlet is connected to the top or bottom connection of the moving bed heat exchange channel 6 according to cold / heat storage or cold / heat release.

[0029] The second thermal insulation particle tank 8 is used to store particles with high-grade cold / heat energy. The outer side of the tank body is wrapped with thermal insulation materials such as glass fiber, aerogel, polymer foam resin, asbestos, rock wool, etc. for insulation, and its thermal insulation requirements are higher than those of the first thermal insulation particle tank 2. The top is a solid inlet and the bottom is a solid outlet. The solid inlet and solid outlet are connected to the bottom or top connection of the moving bed heat exchange channel 6 according to the storage of cold / heat or the release of cold / heat.

[0030] The moving bed heat exchange channel 6 provides space for gas-solid coupled heat exchange and is made of stainless steel, quartz, or other high-strength materials that are both cold-resistant and heat-resistant. It is wrapped with insulation materials such as glass fiber, aerogel, polymer foam resin, asbestos, and rock wool to maintain heat preservation, and requires high insulation.

[0031] The gas phase heat transfer medium of the present invention can be any gas heat transfer medium, such as nitrogen, air, helium, argon and other gases existing in nature or gases separated / produced through industrial devices / processes.

[0032] The moving bed heat exchange channel 6 is composed of a plurality of vertical pipes, and both the solid phase cold / heat storage mechanism and the gas phase heat transfer mechanism exchange heat in the vertical pipes.

[0033] Alternatively, the moving bed heat exchange channel 6 may also be a single vertical pipe. The shape of the pipe is not limited to vertical, and the pipe may also be inclined.

[0034] Furthermore, when the pipeline is in an inclined state, in order to prevent the cold / heat storage particles from contacting the inner wall of the pipeline for a long time when flowing to the second thermal insulation particle tank 8 and the cold / heat storage particles from stacking, thereby affecting the heat transfer efficiency, the utility model also includes a vibration device (not shown in the figure), which acts on the moving bed heat exchange channel 6 to cause the pipeline to vibrate at high frequency.

[0035] When it is necessary to release cold / heat, the gaseous heat transfer medium is used to extract the high-quality cold / heat energy from the solid-phase cold / heat storage material. The solid-phase particles transfer their stored high-quality cold / heat energy to the gaseous medium, which is then transported to the cold / heat equipment in the energy storage or other industrial systems.

[0036] The energy transfer between the above-mentioned gas phase heat transfer medium and solid phase particles is completed through heat conduction, heat convection and heat radiation, which respectively follow Fourier's law, Newton's cooling law and Kirchhoff's thermal radiation law. The three heat exchange mechanisms develop simultaneously, realizing the transfer of high-quality cold / heat energy from the solid phase cold / heat storage medium to the gas phase heat transfer medium.

[0037] The particle valve 4 is used to control the flow of solid particles and control the particle flow rate by controlling the valve opening, thereby controlling the flow rate of the particles. The valve can be a ball valve, a gate valve or the like that allows the flow of particles.

[0038] The gas distributor 7 is used to evenly distribute the gaseous heat transfer medium entering the moving bed heat exchange channel 6 , so that the gaseous heat transfer medium is evenly distributed on the cross section of the moving bed heat exchange channel 6 .

[0039] The particle distributor is used to evenly distribute the solid phase cold storage / heat storage medium entering the moving bed heat exchange channel 6 , so that the solid phase cold storage / heat storage medium is evenly distributed on the cross section of the moving bed heat exchange channel 6 .

[0040] The elevator 1 is electrically driven and is used to raise and lower the first and second thermal insulation granule tanks 2 and 8. During the cold / heat storage process, the elevator 1 lowers the second thermal insulation granule tank 8 to the bottom of the moving bed heat exchange channel 6 and raises the first thermal insulation granule tank 2 to the top of the moving bed heat exchange channel 6. During the cold / heat release process, the elevator 1 raises the second thermal insulation granule tank 8 to the top of the moving bed heat exchange channel 6 and lowers the first thermal insulation granule tank 2 to the bottom of the moving bed heat exchange channel 6.

[0041] The connecting device 3 is used to connect the moving bed heat exchange channel 6 and the first heat-insulating particle tank 2 or the second heat-insulating particle tank 8 and maintain a sealing effect.

[0042] According to a direct contact gas-solid countercurrent heat exchange solid phase cold / heat storage system provided by the present invention, the connection between the moving bed heat exchange channel 6 and the second thermal insulation particle tank 8 or the first thermal insulation particle tank 2 is achieved through a connecting device 3.

[0043] According to a direct contact gas-solid countercurrent heat exchange solid phase cold / heat storage system provided by the present invention, the particle flow in the moving bed heat exchange channel 6 is achieved through the particle valve 4 at the top or bottom thereof.

[0044] According to a direct contact gas-solid countercurrent heat exchange solid phase cold / heat storage system provided by the present invention, the solid phase cold / heat storage medium and the gas phase heat transfer medium in the moving bed heat exchange channel 6 are in direct contact for heat exchange.

[0045] According to a direct contact gas-solid countercurrent heat exchange solid phase cold / heat storage system provided by the utility model, the cold / heat storage particles in the second thermal insulation particle tank 8 and the first thermal insulation particle tank 2 are inert materials, and can be made of quartz sand, basalt particles, coal slag, cement clinker, stainless steel beads, lead beads and other materials.

[0046] The process flow of a large-scale solid phase cold / heat storage system with direct contact gas-solid countercurrent heat exchange provided by the utility model is as follows:

[0047] Taking the cold storage process as an example

[0048] The elevator 1 first lowers the second insulation particle tank 8 (cold tank) and connects it to the bottom of the moving bed heat exchange channel 6 through the connecting device 3, and then lifts the first insulation particle tank 2 (hot tank) and connects it to the top of the moving bed heat exchange channel 6 through the connecting device 3.

[0049] Open the particle valve 4 at the top of the moving bed heat exchange channel 6, so that the room temperature solid phase cold / heat storage particles in the first insulation particle tank 2 (hot tank) located at the top of the moving bed heat exchange channel 6 can flow evenly into the moving bed heat exchange channel 6 through the solid distributor 5.

[0050] The low-temperature gas phase heat transfer medium with high-grade cold energy enters the moving bed heat exchange channel 6 evenly from the bottom through the gas distributor 7.

[0051] According to the law of conservation of energy and the principle of heat exchange balance, the particle valve 4 at the bottom of the moving bed heat exchange channel 6 is opened, and the particle flow rate is adjusted to match the flow rate of the gas phase heat transfer medium.

[0052] The low-temperature vapor-phase heat transfer medium and the room-temperature solid-phase cold / heat storage particles flow upward and downward in the moving bed heat exchange channel 6, respectively. The low-temperature vapor-phase heat transfer medium is driven by pressure, while the room-temperature solid-phase cold / heat storage particles are driven by gravity. The two flow in opposite directions, creating a coupled direct contact countercurrent heat exchange. During this process, the low-temperature vapor-phase heat transfer medium and the room-temperature solid-phase cold / heat storage particles transfer high-quality cold energy from the low-temperature vapor-phase heat transfer medium to the room-temperature solid-phase cold / heat storage particles through heat transfer, convection, and radiation.

[0053] After the cold energy is transferred in the moving bed heat exchange channel 6, the low-temperature solid phase cold / heat storage particles pass through the particle valve 4 and the connecting device 3 in sequence and enter the second thermal insulation particle tank 8 to store the high-quality cold energy.

[0054] After the cold energy transfer in the moving bed heat exchange channel 6 is completed, the room temperature gas phase heat transfer medium is discharged from the top of the moving bed heat exchange channel 6, circulated and continues to obtain high-quality cold energy and returns to the bottom air inlet of the moving bed heat exchange channel 6 to enter the moving bed heat exchange channel 6 to transfer the high-quality cold energy to the room temperature solid phase cold / heat storage particles (repeat the above steps), or used for other industrial purposes.

[0055] The direct contact gas-solid countercurrent heat exchange solid phase cold / heat storage system provided by the utility model has the same basic process as the above in the cold release process, except that:

[0056] The elevator 1 first lowers the first insulation particle tank 2 (hot tank) and connects it to the bottom of the moving bed heat exchange channel 6 through the connecting device 3, and then lifts the second insulation particle tank 8 (cold tank) and connects it to the top of the moving bed heat exchange channel 6 through the connecting device 3.

[0057] The normal temperature gas phase heat transfer medium with low-grade cold / heat energy enters the moving bed heat exchange channel 6 evenly from the bottom through the gas distributor 7.

[0058] After the cold energy transfer is completed in the moving bed heat exchange channel 6, the room temperature solid phase cold / heat storage particles pass through the particle valve 4 and the connecting device 3 in sequence and enter the first heat preservation particle tank 2.

[0059] After the cold energy transfer in the moving bed heat exchange channel 6 is completed, the low-temperature gaseous heat transfer medium is discharged from the top of the moving bed heat exchange channel 6, circulated to transfer the high-quality cold energy to the working medium in the required industrial process, and then returned to the bottom air inlet of the moving bed heat exchange channel 6 after being heated to room temperature to enter the moving bed heat exchange channel 6 to absorb the high-quality cold energy in the low-temperature solid-phase cold / heat storage particles (similar to the above steps), or used for other industrial purposes.

[0060] The direct contact gas-solid countercurrent heat exchange solid phase cold / heat storage system provided by the utility model has the same basic process as the above-mentioned heat storage process, except that:

[0061] The elevator 1 first lowers the second insulation particle tank 8 (hot tank) and connects it to the bottom of the moving bed heat exchange channel 6 through the connecting device 3, and then lifts the first insulation particle tank 2 (cold tank) and connects it to the top of the moving bed heat exchange channel 6 through the connecting device 3.

[0062] The high-temperature gas phase heat transfer medium with high-grade thermal energy enters the moving bed heat exchange channel 6 evenly from the bottom through the gas distributor 7.

[0063] After the heat energy transfer is completed in the moving bed heat exchange channel 6, the high-temperature solid phase cold / heat storage particles pass through the particle valve 4 and the connecting device 3 in sequence and enter the second heat-insulating particle tank 8.

[0064] After the cold energy transfer in the moving bed heat exchange channel 6 is completed, the room temperature gas phase heat transfer medium is discharged from the top of the moving bed heat exchange channel 6, circulated and continues to obtain high-quality heat energy and returns to the bottom air inlet of the moving bed heat exchange channel 6 to enter the moving bed heat exchange channel 6 to transfer the high-quality heat energy to the room temperature solid phase cold / heat storage particles (similar to the above steps), or used for other industrial purposes.

[0065] The direct contact gas-solid countercurrent heat exchange large-scale solid phase cold / heat storage system provided by the utility model has the same basic process as the above-mentioned heat release process, except that:

[0066] The elevator 1 first lowers the first insulation particle tank 2 (cold tank) and connects it to the bottom of the moving bed heat exchange channel 6 through the connecting device 3, and then lifts the second insulation particle tank 8 (hot tank) and connects it to the top of the moving bed heat exchange channel 6 through the connecting device 3.

[0067] The normal temperature gas phase heat transfer medium with low-grade cold / heat energy enters the moving bed heat exchange channel 6 evenly from the bottom through the gas distributor 7.

[0068] After the cold energy transfer is completed in the moving bed heat exchange channel 6, the room temperature solid phase cold / heat storage particles pass through the particle valve 4 and the connecting device 3 in sequence and enter the first heat preservation particle tank 2.

[0069] After the cold energy transfer in the moving bed heat exchange channel 6 is completed, the high-temperature gaseous heat transfer medium is discharged from the top of the moving bed heat exchange channel 6, circulated to transfer the high-quality heat energy to the working medium in the required industrial process and then returned to the bottom air inlet of the moving bed heat exchange channel 6 to enter the moving bed heat exchange channel 6 to absorb the high-quality heat energy in the high-temperature solid-phase cold / heat storage particles (similar to the above steps), or used for other industrial purposes.

[0070] The utility model provides a direct contact gas-solid countercurrent heat exchange large-scale solid phase cold / heat storage system, in which the solid-phase particle cold / heat storage medium performs nearly countercurrent heat exchange in the moving bed heat exchange channel. This heat exchange mode has a larger heat transfer area and high heat transfer efficiency, and can also significantly reduce the gas-solid heat exchange temperature difference, improve the cold / heat storage efficiency, and obtain higher-quality cold / heat energy storage; through the arrangement of two insulated particle tanks, the particles store high-quality cold / heat energy in the second insulated particle tank and store low-quality cold / heat energy in the first insulated particle tank. The separate storage completely avoids the dynamic effect of the temperature gradient layer inside the solid phase cold / heat storage, and has excellent performance; the gas phase heat transfer medium and the solid phase cold / heat storage medium in the moving bed heat exchange channel are made to flow evenly through the gas distributor and the solid distributor, further improving the heat exchange efficiency; the use of inert and common solid phase cold / heat storage materials to store high-quality cold / heat energy has low investment cost, high safety factor and environmental friendliness, has good universality, and is basically suitable for cold / heat energy storage in any temperature zone.

[0071] While the present invention has been described with reference to several exemplary embodiments, it should be understood that the terms used are illustrative and exemplary rather than restrictive. Since the present invention can be embodied in a variety of forms without departing from the spirit or essence of the invention, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope of the appended claims. Therefore, all changes and modifications that fall within the scope of the claims or their equivalents are intended to be covered by the appended claims.

Claims

1. A large-scale solid phase cold / heat storage system with direct contact gas-solid countercurrent heat exchange, characterized in that: The moving bed heat exchange channel comprises an inlet for the gas phase heat transfer medium to enter the moving bed heat exchange channel at the bottom, and an outlet for the gas phase heat transfer medium to flow out at the top; a first heat-insulating particle tank and a second heat-insulating particle tank for storing cold / hot particles, the first heat-insulating particle tank and the second heat-insulating particle tank can be selectively connected to the upper or lower part of the moving bed heat exchange channel. When the first heat-insulating particle tank is connected to the upper part of the moving bed heat exchange channel, the second heat-insulating particle tank is connected to the lower part of the moving bed. When the second heat-insulating particle tank is connected to the upper part of the moving bed heat exchange channel, the heat-insulating particle tank can be connected to the lower part of the moving bed. When the heat exchange is completed, the first thermal insulation particle tank is connected to the lower part of the moving bed. During heat exchange, the cold / hot storage particles entering the upper part of the moving bed heat exchange channel move downward under the action of gravity. The gaseous heat transfer medium entering the moving bed heat exchange channel from the inlet flows toward the upper part of the moving bed heat exchange channel under the driving force of pressure. The upward-flowing airflow and the cold / hot storage particles perform coupled direct contact countercurrent heat exchange to reduce the gas-solid heat exchange temperature difference. The airflow after heat exchange flows out from the outlet, and the cold / hot storage particles after heat exchange fall downward into the thermal insulation particle tank connected to the lower part of the moving bed heat exchange channel. There are multiple moving bed heat exchange channels, and the multiple moving bed heat exchange channels are arranged in parallel.

2. The large-scale solid phase cold / heat storage system with direct contact gas-solid countercurrent heat exchange according to claim 1 is characterized in that: The moving bed heat exchange channel is vertically arranged, and the first heat-insulating particle tank and the second heat-insulating particle tank are both connected to the moving bed heat exchange channel through pipelines.

3. The large-scale solid phase cold / heat storage system with direct contact gas-solid countercurrent heat exchange according to claim 1 is characterized in that: The moving bed heat exchange channel is arranged obliquely, and the first heat-insulating particle tank and the second heat-insulating particle tank are both connected to the moving bed heat exchange channel through pipelines.

4. The large-scale solid phase cold / heat storage system with direct contact gas-solid countercurrent heat exchange according to claim 3 is characterized in that: It also includes a vibration device, which acts on the moving bed heat exchange channel.

5. The large-scale solid phase cold / heat storage system with direct contact gas-solid countercurrent heat exchange according to claim 1 is characterized in that: It also includes a solid distributor arranged at the upper part of the moving bed heat exchange channel and a gas distributor arranged at the lower part of the moving bed heat exchange channel. The cold / heat storage particles enter the multiple moving bed heat exchange channels evenly through the solid distributor, and the gaseous heat transfer medium enters the multiple moving bed heat exchange channels evenly through the gas distributor.

6. The large-scale solid phase cold / heat storage system with direct contact gas-solid countercurrent heat exchange according to claim 1 is characterized in that: It also includes a particle valve, which is arranged on the connecting pipe between the moving bed heat exchange channel and the insulation particle tank. The particle valve can control the flow of cold / heat storage particles entering the moving bed heat exchange channel.

7. The large-scale solid phase cold / heat storage system with direct contact gas-solid countercurrent heat exchange according to claim 1 is characterized in that: The cold / heat storage particles are inert materials.

8. The large-scale solid phase cold / heat storage system with direct contact gas-solid countercurrent heat exchange according to claim 1 is characterized in that: The moving bed heat exchange channel is made of a high-strength material that is resistant to cold / heat. The high-strength material that is resistant to cold / heat is stainless steel or quartz, and its outer side is wrapped with glass fiber, aerogel, polymer foam resin, asbestos, or rock wool.

9. The large-scale solid phase cold / heat storage system with direct contact gas-solid countercurrent heat exchange according to claim 6 is characterized in that: It also includes an elevator, which can selectively control the height of the first insulation particle tank or the second insulation particle tank so that the first insulation particle tank or the second insulation particle tank is located above or below the moving bed heat exchange channel, so as to facilitate the connection of the first insulation particle tank or the second insulation particle tank with the top pipeline or the bottom pipeline of the moving bed heat exchange channel.

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