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

Abstract

The invention 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, the lower portion of the moving bed heat exchange channel is provided with an inlet for a gas phase heat transfer medium to enter, and the upper portion of the moving bed heat exchange channel is provided with an outlet for the gas phase heat transfer medium to flow out; 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 present invention relates to the technical field of large-scale storage, release and utilization of cold / heat energy, and particularly relates to a direct-contact gas-solid countercurrent heat exchange large-scale solid-phase cold / heat storage system. Background Art

[0002] In order to adjust the energy structure and relieve the tense situation of energy, in recent years, the recovery of cold energy and waste heat utilization in industrial processes have received extensive attention, which includes the recovery and utilization of cold energy such as LNG and ethylene, as well as the waste heat recovery of materials such as slag and graphite in industrial processes. Maximizing the recovery of these energies and making effective use of them is of great significance to China's energy cause.

[0003] Currently, there are mainly two large-scale cold / heat storage technologies. One is to use liquid media of alkanes for cold / heat storage, and the other is to use solid-phase particulate matter for cold / heat storage. However, the working media of alkanes are expensive and have the characteristics of being flammable and explosive, which makes it difficult to promote. Although the solid-phase particulate matter is cheap, due to its special structural design, affected by the dynamic effect of the thermocline, the grade of the stored cold / heat energy is low and the efficiency is low. In addition, phase change materials are also an option, but they are too expensive and not yet mature. These have all hindered the large-scale promotion and application of large-scale cold / heat storage technologies.

[0004] For large-scale cold / heat storage technologies, their performance, economy, scale, safety, environmental friendliness and technological maturity should be considered simultaneously, and currently, no large-scale cold / heat storage technology can meet the above requirements at the same time. Therefore, it is crucial to develop cold / heat storage technologies that ensure excellent performance and meet the current economic and environmental requirements. Summary of the Invention

[0005] The purpose of the present invention is to solve the technical problem that due to the special structural design of the solid-phase particulate matter in the prior art, affected by the dynamic effect of the thermocline, the grade of the stored cold / heat energy is low and the efficiency is low.

[0006] To solve the above technical problems, the present invention provides a direct-contact gas-solid countercurrent heat exchange large-scale solid-phase cold / heat storage system, which includes: a moving bed heat exchange channel, an inlet for supplying a gas-phase heat transfer medium is provided at the lower part of the moving bed heat exchange channel, and an outlet for discharging the gas-phase heat transfer medium is provided at the upper part; a first heat-insulated particle tank and a second heat-insulated particle tank for storing cold / heat storage particles, the first heat-insulated particle tank and the second heat-insulated particle tank can be selectively connected to the upper or lower part of the moving bed heat exchange channel. When the first heat-insulated particle tank is connected to the upper part of the moving bed heat exchange channel, the second heat-insulated particle tank is connected to the lower part of the moving bed. When the second heat-insulated particle tank is connected to the upper part of the moving bed heat exchange channel, the first heat-insulated particle tank is connected to the lower part of the moving bed. During heat exchange, the cold / heat storage particles entering the upper part of the moving bed heat exchange channel move downward under the action of gravity, and the gas-phase heat transfer medium entering the moving bed heat exchange channel from the inlet flows upward in the moving bed heat exchange channel under the drive of pressure. The upward-flowing gas stream performs coupled direct-contact countercurrent heat exchange with the cold / heat storage particles to reduce the gas-solid heat exchange temperature difference. The heat-exchanged gas stream flows out from the outlet, and the heat-exchanged cold / heat storage particles fall downward into the heat-insulated particle tank connected to the lower part of the moving bed heat exchange channel.

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

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

[0009] Further, a vibration device is also included, and the vibration device acts on the moving bed heat exchange channel.

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

[0011] Further, a solid distributor provided at the upper part of the moving bed heat exchange channel and a gas distributor provided at the lower part of the moving bed heat exchange channel are also included. The cold / heat storage particles enter the multiple moving bed heat exchange channels evenly through the solid distributor, and the gas-phase heat transfer medium enters the multiple moving bed heat exchange channels evenly through the gas distributor.

[0012] Further, a particle valve is also included. The particle valve is provided on the connecting pipeline between the moving bed heat exchange channel and the heat-insulated particle tank, and the particle valve can control the flow rate of the cold / heat storage particles entering the moving bed heat exchange channel.

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

[0014] Further, the moving bed heat exchange channel is made of high-strength materials resistant to cold / heat such as stainless steel or quartz, and is wrapped with thermal insulation materials such as glass fiber, aerogel, polymer foamed resin, asbestos, or rock wool on the outside.

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

[0016] As can be seen from the above technical solutions, the beneficial effects of the present invention are:

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

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

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

[0020] Using 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 applicable to cold / heat energy storage in any temperature range. Description of the Drawings

[0021] Figure 1 is a schematic diagram of the direct contact gas-solid countercurrent heat exchange large-scale solid-phase cold / heat storage system provided by this application. Detailed Embodiments

[0022] Typical embodiments embodying 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 can have various changes in different embodiments, all of which do not depart from the scope of the present invention, and the descriptions and illustrations therein are for illustrative purposes in essence and not for limiting the present invention.

[0023] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0024] In order to further illustrate the principle and structure of the present invention, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0025] Please refer to Figure 1 , a direct-contact gas-solid countercurrent heat exchange large-scale solid-phase cold / heat storage system provided for this embodiment, includes

[0026] The present invention provides a large-scale cold / heat storage device to solve the problems of low cold / heat energy grade, limited efficiency or danger in the existing large-scale cold / heat storage technology, and improve the performance and various aspects of the large-scale cold / heat storage technology.

[0027] The present invention uses inexpensive solid-phase particles to store high-grade cold / heat energy, reduces the system investment, and has good economy.

[0028] The large-scale cold / heat storage device with gas-solid countercurrent coupled heat exchange of the present invention includes a first heat-insulated particle tank 2, a second heat-insulated particle tank 8, a moving bed heat exchange channel 6, a particle valve 4, a gas distributor 7, a solid distributor 5, a lift 1, and a connecting device 3. Among them, the first heat-insulated particle tank 2 is used to store particles with low-grade cold / heat energy, and heat-insulating materials such as fiberglass, aerogel, polymer foaming resin, asbestos, and rock wool are wrapped outside the tank for heat insulation. Its bottom is a solid outlet, and its top is a solid inlet. Its 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 respectively.

[0029] The second heat-insulated particle tank 8 is used to store particles with high-grade cold / heat energy. Heat-insulating materials such as fiberglass, aerogel, polymer foaming resin, asbestos, and rock wool are used to wrap the outside of the tank for heat insulation, and its heat insulation requirement is higher than that of the first heat-insulated particle tank 2. Its top is a solid inlet, and its bottom is a solid outlet. Its solid inlet and solid outlet are respectively connected to the bottom or top connection of the moving bed heat exchange channel 6 according to cold / heat storage or cold / heat release.

[0030] The moving bed heat exchange channel 6 is used to provide a space for gas-solid coupled heat exchange and is made of stainless steel, quartz, or other high-strength materials resistant to cold / heat. Heat-insulating materials such as fiberglass, aerogel, polymer foaming resin, asbestos, and rock wool are used to wrap the outside of the tank for heat insulation, and the heat insulation requirement is high.

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

[0032] The moving bed heat exchange channel 6 is composed of multiple 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] Optionally, the moving bed heat exchange channel 6 can also be a single vertical pipe, and the shape of the pipe is not limited to vertical, and the pipe can also be inclined.

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

[0035] When cold / heat needs to be released, the gas-phase heat transfer medium is used to extract the high-grade cold / heat energy of the solid-phase cold / heat storage material. The solid-phase particles transfer the high-grade cold / heat energy they store to the gas-phase medium, and then the gas-phase medium is transported to the cold / heat using equipment in the energy storage or other industrial systems.

[0036] The energy transfer between the above-mentioned gas-phase heat transfer medium and the solid-phase particles is completed through heat conduction, heat convection, and heat radiation, which respectively follow Fourier's law, Newton's law of cooling, and Kirchhoff's law of thermal radiation. The three heat transfer mechanisms develop simultaneously, realizing the transfer of high-grade 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 particle flow. The valve uses valves that allow particle flow such as ball valves and gate valves.

[0038] The gas distributor 7 is used to evenly distribute the gas-phase heat transfer medium introduced into the moving bed heat exchange channel 6, so that the gas-phase 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 / heat storage medium introduced into the moving bed heat exchange channel 6, so that the solid-phase cold / 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 to lift / lower the first heat-insulated particle tank 2 and the second heat-insulated particle tank 8. During the cold / heat storage process, the elevator 1 lowers the second heat-insulated particle tank 8 to the bottom of the moving bed heat exchange channel 6 and lifts the first heat-insulated particle tank 2 to the top of the moving bed heat exchange channel 6. During the cold / heat release process, the elevator 1 lifts the second heat-insulated particle tank 8 to the top of the moving bed heat exchange channel 6 and lowers the first heat-insulated particle 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 with the first heat-insulated particle tank 2 or the second heat-insulated 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 heat-insulated particle tank 8 or the first heat-insulated particle tank 2 is realized through the 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 rate in the moving bed heat exchange channel 6 is realized through the particle valve 4 at its top or bottom.

[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 present invention, the cold / heat storage particles in the second heat-insulated particle tank 8 and the first heat-insulated particle tank 2 are inert materials, and various materials such as quartz sand, basalt particles, cinder, cement clinker, stainless steel beads, and lead beads can be used.

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

[0047] Taking the cold storage process as an example

[0048] The elevator 1 first lowers the second heat-insulated 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 raises the first heat-insulated 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 normal temperature solid phase cold / heat storage particles in the first heat-insulated particle tank 2 (hot tank) located at the top of the moving bed heat exchange channel 6 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, open the particle valve 4 at the bottom of the moving bed heat exchange channel 6 and adjust the particle flow rate to match the gas-phase heat transfer medium flow rate.

[0052] The low-temperature gas-phase heat transfer medium and the normal temperature solid phase cold / heat storage particles flow upward and downward respectively in the moving bed heat exchange channel 6. Among them, the flow of the low-temperature gas-phase heat transfer medium is driven by pressure, and the normal temperature solid phase cold / heat storage particles are driven by gravity. The two flow directions are completely opposite, and they carry out coupled direct contact countercurrent heat exchange. In this process, the low-temperature gas-phase heat transfer medium and the normal temperature solid phase cold / heat storage particles complete the transfer of high-grade cold energy from the low-temperature gas-phase heat transfer medium to the normal temperature solid phase cold / heat storage particles through heat conduction, heat convection and thermal radiation.

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

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

[0055] The basic process of the direct contact gas-solid countercurrent heat exchange solid phase cold / heat storage system provided by the present invention is the same as the above during the cold release process, the difference is:

[0056] The elevator 1 first lowers the first heat-insulated 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 raises the second heat-insulated 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 normal-temperature solid-phase cold / heat storage particles sequentially pass through the particle valve 4 and the connecting device 3 and enter the first heat preservation particle tank 2.

[0059] After the cold energy transfer is completed in the moving bed heat exchange channel 6, the low-temperature gas-phase heat transfer medium is discharged from the top of the moving bed heat exchange channel 6, and is circulated to transfer the high-grade cold energy to the working medium in the required industrial process and return to normal temperature, then return to the bottom air inlet of the moving bed heat exchange channel 6 to absorb the high-grade cold energy in the low-temperature solid-phase cold / heat storage particles (similar to the above steps), or for other industrial uses.

[0060] A direct contact gas-solid countercurrent heat exchange solid-phase cold / heat storage system provided by the present invention has the same basic process as the above during the heat storage process, except that:

[0061] The elevator 1 first lowers the second heat preservation 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 heat preservation 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 heat 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 sequentially pass through the particle valve 4 and the connecting device 3 and enter the second heat preservation particle tank 8.

[0064] After the cold energy transfer is completed in the moving bed heat exchange channel 6, the normal-temperature gas-phase heat transfer medium is discharged from the top of the moving bed heat exchange channel 6, and is circulated to continue obtaining high-grade heat energy and return to the bottom air inlet of the moving bed heat exchange channel 6 to transfer the high-grade heat energy to the normal-temperature solid-phase cold / heat storage particles (similar to the above steps), or for other industrial uses.

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

[0066] The elevator 1 first lowers the first heat preservation 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 heat preservation 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 normal-temperature solid-phase cold / heat storage particles sequentially pass through the particle valve 4 and the connecting device 3 and enter the first heat preservation particle tank 2.

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

[0070] The solid-phase particle cold / heat storage medium of the direct-contact gas-solid countercurrent heat exchange large-scale solid-phase cold / heat storage system provided by the present invention has nearly countercurrent heat exchange in the moving bed heat exchange channel. Such a heat exchange mode has a larger heat transfer area, high heat transfer efficiency, can also greatly reduce the gas-solid heat exchange temperature difference, improve the cold / heat storage efficiency, and obtain higher-grade cold / heat energy storage; through the setting of two heat preservation particle tanks, the particles store the high-grade cold / heat energy in the second heat preservation particle tank and the low-grade cold / heat energy in the first heat preservation particle tank. The separate storage completely avoids the dynamic effect of the thermocline inside the solid-phase cold / heat storage, and has excellent performance; through the gas distributor and the solid distributor, the gas-phase heat transfer medium and the solid-phase cold / heat storage medium in the moving bed heat exchange channel flow evenly, further improving the heat exchange efficiency; using inert and common solid-phase cold / heat storage materials to store high-grade cold / heat energy, with low investment cost, high safety factor and environmental friendliness, having good universality, and being basically applicable to cold / heat energy storage in any temperature range.

[0071] Although 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 many 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 broadly construed within the spirit and scope defined by the appended claims. Therefore, all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A direct-contact gas-solid countercurrent heat exchange large-scale solid-phase cold / heat storage system, characterized in that It includes a moving bed heat exchange channel. An inlet for the gas-phase heat transfer medium to enter is provided at the lower part of the moving bed heat exchange channel, and an outlet for the gas-phase heat transfer medium to flow out is provided at the upper part. There are a first heat-insulated particle tank and a second heat-insulated particle tank for storing cold / heat storage particles. The first heat-insulated particle tank and the second heat-insulated particle tank can be selectively connected to the upper or lower part of the moving bed heat exchange channel. When the first heat-insulated particle tank is connected to the upper part of the moving bed heat exchange channel, the second heat-insulated particle tank is connected to the lower part of the moving bed. When the second heat-insulated particle tank is connected to the upper part of the moving bed heat exchange channel, the first heat-insulated particle tank is connected to the lower part of the moving bed. During heat exchange, the cold / heat storage particles entering the upper part of the moving bed heat exchange channel move downward under the action of gravity, and the gas-phase heat transfer medium entering the moving bed heat exchange channel from the inlet flows upward in the moving bed heat exchange channel under the drive of pressure. The upward flowing gas stream and the cold / heat storage particles perform coupled direct contact countercurrent heat exchange to reduce the gas-solid heat exchange temperature difference. The heat-exchanged gas stream flows out from the outlet, and the heat-exchanged cold / heat storage particles fall downward into the heat-insulated particle tank connected to the lower part of the moving bed heat exchange channel.

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

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

4. The direct-contact gas-solid countercurrent heat exchange large-scale solid-phase cold / heat storage system according to claim 3, wherein It also includes a vibration device, and the vibration device acts on the moving bed heat exchange channel.

5. The direct-contact gas-solid countercurrent heat exchange large-scale solid-phase cold / heat storage system according to any one of claims 1 to 4, characterized in that, There are multiple moving bed heat exchange channels, and the multiple moving bed heat exchange channels are arranged in parallel side by side.

6. The direct-contact gas-solid countercurrent heat exchange large-scale solid-phase cold / heat storage system according to claim 5, wherein It also includes a solid distributor provided at the upper part of the moving bed heat exchange channel and a gas distributor provided 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 gas-phase heat transfer medium enters the multiple moving bed heat exchange channels evenly through the gas distributor.

7. The direct contact gas-solid countercurrent heat exchange large-scale solid-phase cold / heat storage system according to claim 5, characterized in that It also includes a particle valve. The particle valve is provided on the connecting pipeline between the moving bed heat exchange channel and the heat-insulated particle tank, and the particle valve can control the flow rate of the cold / heat storage particles entering the moving bed heat exchange channel.

8. The direct-contact gas-solid countercurrent heat exchange large-scale solid-phase cold / heat storage system according to claim 1, wherein The cold / heat storage particles are made of inert materials.

9. The direct-contact gas-solid countercurrent heat exchange large-scale solid-phase cold / heat storage system according to claim 5, wherein The moving bed heat exchange channel is made of high-strength materials resistant to cold / heat such as stainless steel or quartz, and its outer side is wrapped with heat-insulating materials such as glass fiber, aerogel, polymer foaming resin, asbestos, or rock wool.

10. The direct-contact gas-solid countercurrent heat exchange large-scale solid-phase cold / heat storage system according to claim 7, wherein It further includes a lift, which can optionally control the height of the first heat-insulated particle tank or the second heat-insulated particle tank to place the first heat-insulated particle tank or the second heat-insulated particle tank at the upper or lower part of the moving bed heat exchange channel. ， This is to facilitate the connection of the first heat-insulated particle tank or the second heat-insulated particle tank to the top pipeline or the bottom pipeline of the moving bed heat exchange channel.

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