Mobile large-scale cold storage system based on medium packaging and transportation

Abstract

The utility model provides a mobile large-scale cold storage system based on medium packaging and transportation, which comprises a normal-temperature material bin and a low-temperature material bin which are arranged up and down, a plurality of porous medium modules which are in standard shapes and are used for storing cold energy, and a heat exchange channel which is vertically arranged and is communicated with the normal-temperature material bin and the low-temperature material bin, during heat exchange, the gas-phase heat transfer medium can selectively enter the heat exchange channel from top to bottom or enter the heat exchange channel from bottom to top; the flowing direction of the gas-phase heat transfer medium is opposite to the moving direction of the porous medium module in the heat exchange channel; through the design of the low-temperature material bin and the normal-temperature material bin, the low-temperature porous medium module enters the low-temperature material bin, and the normal-temperature porous medium module enters the normal-temperature material bin, so that the temperature fluctuation in the heat exchange process can be reduced, the dynamic thermocline effect is reduced, and the cold storage efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cold energy utilization, cold storage and energy storage in low-temperature processes such as renewable energy and LNG regasification, and in particular to a mobile large-scale cold storage system based on medium packaging and transportation. Background Art

[0002] With the transformation of energy structures in countries around the world and the promotion of future goals of net-zero emission scenarios, energy recovery and storage have received widespread attention. Large-scale cold storage technology is used to recover and utilize cold energy in low-temperature processes, such as the storage of cold energy in the LNG regasification process and the storage of cold energy in liquid air energy storage technology. Therefore, promoting the development of cold storage technology is very important for achieving the current strategic goals of "carbon peak" and "carbon neutrality".

[0003] At present, cold energy storage in industrial processes mainly relies on liquid alkanes or solid packed beds. Alkane media store and release cold energy through heat exchangers, while solid packed beds store and release cold energy through direct contact with fluids. For the current liquid cold storage technology, the alkane media used to store cold energy face the problems of flammability and explosion, pollution and high investment, while for the current solid cold storage technology, the temperature gradient layer effect inside the solid packed bed will weaken the system performance, resulting in a decrease in cold storage efficiency. Utility Model Content

[0004] The utility model aims to solve the technical problem in the prior art that the temperature-cline layer effect inside the solid phase packed bed weakens the system performance and leads to the reduction of the cold storage efficiency.

[0005] In order to solve the above technical problems, the utility model provides a mobile large-scale cold storage system based on medium packaging and transportation, which includes: a normal temperature material bin and a low temperature material bin arranged up and down, a plurality of porous medium modules of standard shapes for storing cold energy, a heat exchange channel arranged vertically and connected with the normal temperature material bin and the low temperature material bin, and a material transportation mechanism for transporting the porous medium module to the normal temperature material bin or the low temperature material bin through the heat exchange channel. During heat exchange, the gas phase heat transfer medium can choose to enter the heat exchange channel from top to bottom or from bottom to top, and the flow direction of the gas phase heat transfer medium is opposite to the movement direction of the porous medium module in the heat exchange channel.

[0006] Furthermore, the material transport mechanism includes a vertical lifting device, which is arranged on the heat exchange channel for vertically transporting the porous medium module, so that the porous medium module is transported from the normal temperature material bin to the low temperature material bin or from the low temperature material bin to the normal temperature material bin.

[0007] Furthermore, the vertical lifting device includes an elevator and a motor for driving the elevator.

[0008] Furthermore, the material transportation mechanism also includes a horizontal transportation device arranged inside the normal temperature material warehouse and the low temperature material warehouse, the vertical lifting device lifts the porous medium module to the designated position of the normal temperature material warehouse or the low temperature material warehouse, and the horizontal transportation device horizontally transports the porous medium module at the designated position, so that the porous medium module can be reasonably and orderly placed in the low temperature material warehouse or the normal temperature material warehouse.

[0009] Furthermore, the porous medium module comprises a packaging shell that allows gas to enter and pass through, and the packaging shell is filled with solid particles.

[0010] Furthermore, the packaging shell is densely provided with openings, and the size of the solid phase particles is larger than the size of the openings.

[0011] Furthermore, the packaging shell is a wire mesh or a perforated metal shell.

[0012] Furthermore, the particle size of the solid phase granular medium is between 1 mm and 20 mm.

[0013] Furthermore, the solid phase particles are made of rock solid phase particles existing in nature such as quartz sand and basalt, or metal particles such as lead balls and steel balls, or inorganic or organic compounds synthesized in industrial processes such as alumina particles.

[0014] Furthermore, both the normal temperature material bin and the low temperature material bin include a metal shell and a heat-insulating material coated on the metal shell. The metal shell is made of 304 stainless steel or 316 stainless steel, and the heat-insulating material is made of pearl sand or polyester ammonia foam.

[0015] It can be seen from the above technical scheme that the beneficial effects of the utility model are: the design of the material bin and the heat exchange channel, the porous medium module can exchange heat with the gas phase heat transfer medium in the heat exchange channel in a direct contact countercurrent heat exchange manner, and the porous medium module after cold storage enters the low-temperature material bin, and the porous medium module after cold release enters the normal temperature material bin, which can reduce the temperature fluctuation during the heat exchange process, thereby reducing the dynamic temperature slope layer effect and improving the cold storage efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of a mobile large-scale cold storage system based on medium packaging and transportation provided by the present application. DETAILED DESCRIPTION

[0017] 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 can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially for illustrative purposes rather than for limiting the present invention.

[0018] 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 positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are 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 cannot be understood as a limitation on 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 indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0019] 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.

[0020] The utility model provides a mobile large-scale cold storage system based on medium packaging and transportation, so as to overcome the technical bottleneck faced by traditional cold storage technology, upgrade and iterate the cold storage technology, and make it meet various requirements such as technicality, economy and safety.

[0021] The utility model provides a mobile large-scale cold storage system based on medium packaging and transportation, with gas-solid direct contact heat exchange as the technical principle, solid particles as the cold storage medium, an elevator 4 and a horizontal transport device 2 to provide driving force for the movement of the solid medium, and a pressure difference to provide driving force for the movement of the gas medium, so as to construct a large-scale cold storage system with excellent performance and many advantages.

[0022] The utility model provides a mobile large-scale cold storage system based on medium packaging and transportation, including a normal temperature material bin 1, a low temperature material bin 7, a porous medium module 5 for storing cold energy, a vertically arranged heat exchange channel 3 and a material transportation mechanism for transporting the porous medium module 5. The normal temperature material bin 1 and the low temperature material bin 7 are arranged up and down, and the heat exchange channel 3 is connected and communicated with the normal temperature material bin 1 and the low temperature material bin 7. The material transportation mechanism drives the porous medium module 5 to rise and fall and transports the porous medium module 5 to the normal temperature material bin 1 or the low temperature material bin 7 through the heat exchange channel 3. The gas-phase heat transfer medium can enter the heat exchange channel 3 from top to bottom or from bottom to top according to the moving direction of the porous medium module 5 in the heat exchange channel 3. The flow direction of the gas-phase heat transfer medium is opposite to the moving direction of the porous medium module 5 in the heat exchange channel 3. Such a design can enable the porous medium module 5 and the gas-phase heat transfer medium to perform countercurrent heat exchange in the heat exchange channel 3. Such a heat exchange mode has a larger heat transfer area and higher heat transfer efficiency, and can also reduce the heat transfer temperature difference between the gas-solid coupled heat exchange, thereby obtaining higher-quality cold / heat energy storage.

[0023] The number of the heat exchange channels 3 can be single or multiple, and the shape of the heat exchange channels 3 can be cylindrical, hexahedral or other polyhedral heat exchange channels 3. The utility model does not limit the number and shape of the heat exchange channels 3.

[0024] The above-mentioned gas phase heat transfer medium can be a heat transfer medium that can achieve similar effects to the present invention, such as air, nitrogen, argon and other gases, or industrially synthesized gases that can be used for cold energy or heat energy transfer.

[0025] The above-mentioned normal temperature material warehouse 1 is arranged just above the low temperature material warehouse 7. When cold storage is required, the material transport mechanism transports the porous medium module 5 in the normal temperature material warehouse 1, so that the porous medium module 5 enters the heat exchange channel 3 and is transported downward toward the low temperature material warehouse 7. In this process, the low temperature and high pressure gas phase heat transfer medium enters the heat exchange channel 3 from the bottom of the heat exchange channel 3. Driven by the pressure, the gas phase heat transfer medium flows upward to exchange heat with the descending porous medium module 5. Then the material transport mechanism transports the low temperature porous medium module 5 that has passed the heat exchange. It is transported to the low-temperature material warehouse 7; when cold release is required, the material transportation mechanism transports the low-temperature porous medium module 5 in the low-temperature material warehouse 7, so that the low-temperature porous medium module 5 enters the heat exchange channel 3 and is transported upward toward the normal temperature material warehouse 1. During this process, the normal temperature and high-pressure gaseous heat transfer medium enters the heat exchange channel 3 from the top of the heat exchange channel 3. Driven by the pressure, the gaseous heat transfer medium flows downward to exchange heat with the rising low-temperature porous medium module 5. Then the material transportation mechanism transports the normal temperature porous medium module 5 that has undergone heat exchange to the normal temperature material warehouse 1.

[0026] Of course, the above-mentioned normal temperature material bin 1 is not limited to being set directly above the low temperature material bin 7. The normal temperature material bin 1 can also be set directly below the low temperature material bin 7 according to actual needs (not shown in the figure). When the normal temperature material bin 1 is set directly below the low temperature material bin 7, when storing cold, the low temperature gas phase heat transfer medium enters from the top of the heat exchange channel 3, and flows out from the bottom of the heat exchange channel 3 after heat exchange. When releasing cold, the normal temperature gas phase heat transfer medium enters from the bottom of the heat exchange channel 3, and flows out from the top of the heat exchange channel 3 after heat exchange.

[0027] The design of the material bin and the heat exchange channel 3 being separately arranged allows the porous medium module 5 to exchange heat with the gas phase heat transfer medium in the heat exchange channel 3 in a direct contact countercurrent heat exchange manner, and the porous medium module 5 after cold storage enters the low-temperature material bin 7, and the porous medium module 5 after cold release enters the normal temperature material bin 1, which can reduce the temperature fluctuation during the heat exchange process, thereby reducing the dynamic temperature slope layer effect and improving the cold storage efficiency.

[0028] Furthermore, the above-mentioned material transportation mechanism includes a vertical lifting device, which is arranged on the heat exchange channel 3 and is used to vertically transport the porous medium module 5, so that the porous medium module 5 is transported from the normal temperature material warehouse 1 to the low temperature material warehouse 7; the vertical lifting device includes an elevator 4 and a motor 6 for driving the elevator 4 to operate. Optionally, the vertical lifting device can also be an elevator or a tower crane.

[0029] Furthermore, the material transportation device also includes a horizontal transportation device 2, which is arranged inside the normal temperature material warehouse 1 and the low temperature material warehouse 7. The vertical lifting device lifts the porous medium module 5 to the designated position of the normal temperature material warehouse 1 or the low temperature material warehouse 7. The horizontal transportation device 2 horizontally transports the porous medium module 5 at the designated position so that the porous medium module 5 can be reasonably and orderly placed in the low temperature material warehouse 7 or the normal temperature material warehouse 1.

[0030] The porous medium module 5 refers to a regular-shaped object after modular packaging of solid-phase particles. The specific packaging method is to fill the solid-phase particles into a standard block or other shaped objects to form a porous medium module 5 of a standard shape. The modular packaging of the solid-phase particle medium avoids the risk of breakage and unstable movement of the medium, so that the system can be operated on a large scale. For the packaging shell of the solid-phase particles, the gas phase is allowed to enter and pass through, so the packaging shell can be a metal shell with a wire mesh or openings, etc., and the opening size is smaller than the size of the solid-phase particles to avoid the solid-phase particles from leaking out of the packaging shell. Generally speaking, in order to ensure efficient heat exchange, the particle size of the solid-phase particle medium is between 1mm and 20mm, and the size of the packaged porous medium module 5 is set according to the actual heat exchange pipeline design and system scale.

[0031] The solid phase particles in the porous medium module 5 can be natural rock solid phase particles such as quartz sand and basalt, or metal particles such as lead balls and steel balls, or inorganic or organic compounds synthesized in industrial processes such as alumina particles.

[0032] There are multiple porous medium modules 5 in the system, which are stored in the normal temperature material bin 1 or the low temperature material bin 7 and regularly discharged, or undergo heat exchange in the heat exchange channel 3 .

[0033] The room temperature material warehouse 1 is a place for storing room temperature porous medium modules 5, and its side is connected to the top side of the heat exchange channel 3 so that the porous medium module 5 that has completed the cooling process can enter. It generally adopts a metal shell and is insulated on the outside. The metal shell generally adopts 304 stainless steel, 316 stainless steel and other materials, and the insulation material adopts pearl sand, polyester amine foam and the like.

[0034] The low-temperature material warehouse 7 is a place for storing low-temperature porous medium modules 5. Its side is connected to the bottom side of the heat exchange channel 3 so that the porous medium module 5 that has completed the cold storage process can enter. It generally adopts a metal shell and is strictly insulated on the outside. The metal shell generally adopts 304 stainless steel, 316 stainless steel and other materials. The insulation material adopts pearlescent sand, polyester ammonia foam, etc. Its insulation requirements are relatively high, and a thicker insulation layer thickness is required than that of the normal temperature material warehouse 1.

[0035] The heat exchange channel 3 is a place where the porous medium module 5 performs heat exchange for storing and releasing cold. In the heat exchange channel 3, the porous medium module 5 performs heat exchange with the gas phase heat transfer medium in a direct contact heat exchange manner to obtain or release cold energy.

[0036] During the heat exchange process, the heat exchange channel 3 moves from top to bottom during the cold storage process and from bottom to top during the cold release process, and the gas phase heat transfer medium moves from bottom to top during the cold storage process and from top to bottom during the cold release process.

[0037] The top of the heat exchange channel 3 is connected to the normal temperature material bin 1 so that the porous medium module 5 in the cold release process can enter the normal temperature material bin 1, and the bottom of the heat exchange channel 3 is connected to the low temperature material bin 7 so that the porous medium module 5 in the cold storage process can enter the low temperature material bin 7.

[0038] The heat exchange channel 3 has inlet and outlet channels for gas phase heat transfer medium at the bottom and top, so that the gas phase heat transfer medium can evenly enter the heat exchange channel 3 and complete the cold storage process in the porous medium module 5 .

[0039] During the heat exchange process, a plurality of porous medium modules 5 are distributed at the bottom of the heat exchange channel 3 . The plurality of porous medium modules 5 are distributed side by side and move simultaneously to achieve a flow similar to that of a fluid.

[0040] The heat exchange channel 3 generally adopts a metal shell, such as 304 stainless steel, 314 stainless steel, etc., and its exterior is wrapped with insulation materials such as pearl sand, polyester amine foam, etc., which requires strict insulation to avoid the loss of cold energy to the environment during heat transfer.

[0041] The elevator 4 is a device for vertically transporting the porous medium module 5. Its main body is on the side of the heat exchange channel 3, and the moving parts are installed inside the heat exchange channel 3. The porous medium module 5 is transported by circulating motion.

[0042] The elevator 4 continuously transports the porous medium module 5 from the top to the bottom of the heat exchange channel 3 in the cold storage phase, and continuously transports the porous medium module 5 from the bottom to the top of the heat exchange channel 3 in the cold release phase.

[0043] The horizontal transport device 2 is a device used to horizontally transport the porous medium module 5, and is installed in both the low-temperature material bin 7 and the normal temperature material bin 1. Its function is to transport the porous medium module 5 that has completed the cold storage process or the cold release process to a designated position so that the porous medium module 5 can be reasonably and orderly placed in the low-temperature material bin 7 or the normal temperature material bin 1.

[0044] During the cold storage process:

[0045] The low-temperature gas carrying cold energy enters the heat exchange channel 3 from the bottom of the heat exchange channel 3;

[0046] The normal temperature cold storage medium package module 5 is placed in the normal temperature material bin 1. At the same time, the horizontal transport device 2 transports the normal temperature cold storage medium package module 5 horizontally to the solid phase inlet at the top of the heat exchange channel 5. Next, the motor 6 drives the elevator 4 to transport the cold storage medium package module 5 vertically.

[0047] In the heat exchange channel 5, the elevator transports multiple cold storage medium package modules 5 from the top to the bottom of the heat exchange channel 4 in sequence, and controls the movement speed of the cold storage medium package modules through the motor. At the same time, the gas phase heat transfer medium with cold energy moves from the bottom to the top of the heat exchange channel 4. The cold storage medium and the gas phase heat transfer medium complete a gas-solid coupled countercurrent heat exchange process of direct gas-solid contact in the heat exchange channel, and the gas phase heat transfer medium transfers cold energy to the cold storage medium.

[0048] After completing the cold energy transfer process, the gas phase heat transfer medium is discharged from the top of the heat exchange channel 4. After the cold storage medium packaging module reaches the bottom of the heat exchange channel 4, it is horizontally transported by the horizontal transportation device 2 and is regularly arranged in the low-temperature material warehouse 7.

[0049] Through the above process, the cold energy is transferred from the gas phase heat transfer medium to the cold storage medium, completing the cold storage process.

[0050] During the cooling process:

[0051] The low-temperature gas carrying cold energy enters the heat exchange channel 3 from the top of the heat exchange channel 3;

[0052] The low-temperature cold storage medium package module 5 is placed in the low-temperature material bin 7. At the same time, the horizontal transport device 2 transports the room-temperature cold storage medium package module 5 horizontally to the solid phase inlet at the bottom of the heat exchange channel 5. Next, the motor 6 drives the elevator 4 to transport the cold storage medium package module 5 vertically.

[0053] In the heat exchange channel 5, the elevator transports multiple low-temperature cold storage medium package modules 5 with cold energy from the bottom of the heat exchange channel 4 to the top in sequence, and controls the movement speed of the cold storage medium package modules through the motor. At the same time, the gas phase heat transfer medium at room temperature moves from the top to the bottom of the heat exchange channel 4. The cold storage medium and the gas phase heat transfer medium complete the gas-solid coupling countercurrent heat exchange process of direct gas-solid contact in the heat exchange channel, and the gas phase heat transfer medium obtains the cold energy stored in the cold storage medium.

[0054] After completing the cold energy transfer process, the gas phase heat transfer medium is discharged from the bottom of the heat exchange channel 4. After the cold storage medium packaging module reaches the top of the heat exchange channel 4, it is horizontally transported by the horizontal transportation device 2 and is regularly arranged in the normal temperature material warehouse 1.

[0055] Through the above process, the gas phase heat transfer medium obtains cold energy from the cold storage medium and completes the cold release process.

[0056] Although the utility model has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the utility model can be implemented in a variety of forms without departing from the spirit or essence of the utility model, it should be understood that the above-mentioned embodiments are not limited to any of the aforementioned details, but should be widely interpreted within the spirit and scope defined by the attached claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the attached claims.

Claims

1. A mobile large-scale cold storage system based on medium packaging and transportation, characterized in that: It includes a normal temperature material bin and a low temperature material bin arranged up and down, a plurality of porous medium modules of standard shapes for storing cold energy, a heat exchange channel arranged vertically and connected with the normal temperature material bin and the low temperature material bin, and a material transportation mechanism for transporting the porous medium module to the normal temperature material bin or the low temperature material bin through the heat exchange channel. During heat exchange, the gas phase heat transfer medium can choose to enter the heat exchange channel from top to bottom or from bottom to top, and the flow direction of the gas phase heat transfer medium is opposite to the moving direction of the porous medium module in the heat exchange channel.

2. The mobile large-scale cold storage system based on medium packaging and transportation according to claim 1 is characterized in that: The material transport mechanism includes a vertical lifting device, which is arranged on the heat exchange channel for vertically transporting the porous medium module, so that the porous medium module is transported from the normal temperature material bin to the low temperature material bin or from the low temperature material bin to the normal temperature material bin.

3. The mobile large-scale cold storage system based on medium packaging and transportation according to claim 2 is characterized in that: The vertical lifting device includes an elevator and a motor that drives the elevator.

4. The mobile large-scale cold storage system based on medium packaging and transportation according to any one of claims 2-3, characterized in that: The material transportation mechanism also includes a horizontal transportation device arranged inside the normal temperature material warehouse and the low temperature material warehouse. The vertical lifting device lifts the porous medium module to the designated position of the normal temperature material warehouse or the low temperature material warehouse. The horizontal transportation device horizontally transports the porous medium module at the designated position so that the porous medium module can be reasonably and orderly placed in the low temperature material warehouse or the normal temperature material warehouse.

5. The mobile large-scale cold storage system based on medium packaging and transportation according to claim 1 is characterized in that: The porous medium module comprises a packaging shell that allows gas to enter and pass through, and the packaging shell is filled with solid particles.

6. The mobile large-scale cold storage system based on medium packaging and transportation according to claim 5 is characterized in that: The packaging shell is densely provided with openings, and the size of the solid phase particles is larger than the size of the openings.

7. The mobile large-scale cold storage system based on medium packaging and transportation according to claim 6 is characterized in that: The packaging shell is a wire mesh or perforated metal shell.

8. The mobile large-scale cold storage system based on medium packaging and transportation according to claim 7 is characterized in that: The particle size of the solid phase granular medium is between 1 mm and 20 mm.

9. The mobile large-scale cold storage system based on medium packaging and transportation according to claim 4 is characterized in that: The solid phase particles are any one of the rock solid phase particles existing in nature such as quartz sand and basalt, or any one of the metal particles such as lead ball and steel ball, or alumina particles.

10. The mobile large-scale cold storage system based on medium packaging and transportation according to claim 1 is characterized in that: Both the normal temperature material bin and the low temperature material bin include a metal shell and a heat-insulating material coated on the metal shell. The metal shell is made of 304 stainless steel or 316 stainless steel, and the heat-insulating material is made of pearl sand or polyester ammonia foam.

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