Large-scale continuous cold storage and release device

Abstract

The invention provides a large-scale continuous cold storage and release device, and particularly relates to the technical field of energy storage and release, the large-scale continuous cold storage and release device comprises a conveying mechanism, a storage tank mechanism and a heat exchanger, the storage mechanism comprises a first particle storage tank, a second particle storage tank, a third particle storage tank and a fourth particle storage tank, the bottom of the first particle storage tank is sequentially connected with the second particle storage tank, the heat exchanger, the third particle storage tank and the fourth particle storage tank, and the first particle storage tank, the second particle storage tank, the heat exchanger, the third particle storage tank and the fourth particle storage tank are vertically and sequentially arranged from top to bottom; according to the cold storage device, the multiple storage tanks are matched with the conveying mechanisms, cold storage and cold release can be continuously completed, and meanwhile the response speed of the whole device is higher.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage and release, and in particular to a large-scale continuous cold storage and release device. Background Art

[0002] Driven by the technology of large-scale grid connection of new energy, the cold storage technology has been widely developed, and cold storage has been widely applied in the field of energy storage, such as liquid air energy storage technology, LNG cold energy storage, etc.

[0003] The moving bed heat exchanger has the characteristics of high heat transfer efficiency, low cost, environmental friendliness, etc. in the field of cold storage. In the existing system, the particles are lifted before the cold storage and release start by the moving bed to further connect the storage tank to the moving bed heat exchanger to complete the heat transfer. When using the moving bed technology for energy storage, there are external components such as elevators and conveyors to transport the particle storage tank. Since the particle transportation takes a certain amount of time, the entire cold storage and release energy system requires a long time to start. Coupled with the time interval of particle transportation during the alternating operation of energy storage and release in the system, it is difficult for the system to operate continuously.

[0004] In view of this, the present invention provides a large-scale continuous energy storage and cold release device with fast response and continuous operation ability. Summary of the Invention

[0005] In order to solve the problems of slow response speed and inability to operate continuously in the existing cold storage and release energy system, the present invention proposes a large-scale continuous cold storage and release device.

[0006] The present invention is realized by the following technical solutions:

[0007] The present invention proposes that the large-scale continuous cold storage and release device includes a transportation mechanism, a storage tank mechanism and a heat exchanger, wherein:

[0008] The storage mechanism includes a first particle storage tank, a second particle storage tank, a third particle storage tank and a fourth particle storage tank. The bottom of the first particle storage tank is sequentially connected to the second particle storage tank, the heat exchanger, the third particle storage tank and the fourth particle storage tank. The first particle storage tank, the second particle storage tank, the heat exchanger, the third particle storage tank and the fourth particle storage tank are arranged vertically from top to bottom in sequence;

[0009] The transportation mechanism is located on both sides of the storage tank. One end of one transportation mechanism is respectively connected to the first particle storage tank and the third particle storage tank, and the two ends of the other transportation mechanism are respectively connected to the second particle storage tank and the fourth particle storage tank.

[0010] Further, the heat exchanger further includes an inlet distributor and an outlet distributor. The inlet distributor is located at the top of the heat exchanger, and the outlet distributor is located at the bottom of the heat exchanger. The inlet distributor is connected to the bottom of the second particle storage tank, and the outlet distributor is connected to the top of the third particle storage tank.

[0011] Further, fluid inlet and fluid outlet pipelines are also provided on the heat exchanger.

[0012] Further, a first valve and a second valve are further included. The first valve is arranged between the bottom of the second particle storage tank and the inlet distributor, and the second valve is arranged between the outlet distributor and the top of the third particle storage tank.

[0013] Further, a third valve and a fourth valve are further included. The third valve is located between the first particle storage tank and the second particle storage tank, and the fourth valve is located between the third particle storage tank and the fourth particle storage tank.

[0014] Advantages of the present invention:

[0015] The large-scale continuous cold storage and release device proposed by the present invention, through the arrangement of multiple storage tanks and transportation mechanisms, compared with the existing cold storage or cold release devices, can operate continuously when storing or releasing cold energy. At the same time, the entire device can achieve rapid response through the transportation mechanism. Finally, the present invention avoids the additional power consumption during the discharge period of the corresponding energy storage system and can avoid the consumption of peak power by the system, so it can reduce the system operation cost. Brief Description of the Drawings

[0016] Figure 1 is a structural diagram of the large-scale continuous cold storage and release device of the present invention;

[0017] In the figure: storage mechanism 1, first particle storage tank 11, second particle storage tank 12, third particle storage tank 13, fourth particle storage tank 14, first valve 2, second valve 3, third valve 4, fourth valve 5, heat exchanger 6, inlet distributor 61, outlet distributor 62, fluid inlet 63, fluid outlet 64, transportation mechanism 7;

[0018] The realization, functional characteristics and advantages of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed Embodiments

[0019] In order to more clearly and completely illustrate the technical solution of the present invention, the present invention will be further described below with reference to the accompanying drawings.

[0020] Please refer to Figure 1 , the present invention proposes a large-scale continuous cold storage and release device including a transportation mechanism 7, a storage tank mechanism and a heat exchanger 6, wherein:

[0021] The storage mechanism 1 includes a first particle storage tank 11, a second particle storage tank 12, a third particle storage tank 13, and a fourth particle storage tank 14. The bottom of the first particle storage tank 11 is sequentially connected to the second particle storage tank 12, the heat exchanger 6, the third particle storage tank 13, and the fourth particle storage tank 14. The first particle storage tank 11, the second particle storage tank 12, the heat exchanger 6, the third particle storage tank 13, and the fourth particle storage tank 14 are vertically arranged from top to bottom in sequence;

[0022] The transport mechanism 7 is located on both sides of the storage tanks. One end of a transport mechanism 7 is respectively connected to the first particle storage tank 11 and the third particle storage tank 13, and the two ends of the other transport mechanism 7 are respectively connected to the second particle storage tank 12 and the fourth particle storage tank 14.

[0023] In this embodiment:

[0024] The first particle storage tank 11, the second particle storage tank 12, the third particle storage tank 13, and the fourth particle storage tank 14 are used to store low-temperature or normal-temperature particles;

[0025] The transport mechanism 7 is used to respectively transport the particles in the third particle storage tank 13 and the fourth particle storage tank 14 into the first particle storage tank 11 and the second particle storage tank 12;

[0026] The heat exchanger 6 is used to exchange heat for the particles in the storage tanks

[0027] Specifically, the adjacent storage tanks and the heat exchanger 6 are connected by a sleeve. Particles for heat exchange are placed in the storage tanks. The entire device is vertically arranged from top to bottom. From top to bottom, they are the first particle storage tank 11, the second particle storage tank 12, the heat exchanger 6, the third particle storage tank 13, and the fourth particle storage tank 14. The transport mechanism 7 is arranged on both sides. The transport mechanism 7 operates to respectively transport the particles in the third particle storage tank 13 and the fourth particle storage tank 14 into the first particle storage tank 11 and the second particle storage tank 12;

[0028] During cold storage, all the normal-temperature particles are stored in the second particle storage tank 12. Subsequently, the particles in the second particle storage tank 12 enter the heat exchanger 6 for heat exchange. The particles fully absorb the cold energy of the fluid-phase medium by gravity drive in the moving bed heat exchanger 6 and enter the third particle storage tank 13. Subsequently, the particles in the third particle storage tank 13 enter the fourth particle storage tank 14 for storage. The entire process is completed entirely by gravity drive without consuming additional power of the transport mechanism 7;

[0029] When releasing cold energy, the low-temperature particles in the fourth particle storage tank 14 are transported by a transport mechanism 7 into the second particle storage tank 12. The low-temperature particles enter the heat exchanger 6 from the second particle storage tank 12 for heat exchange. The particles are driven by gravity in the heat exchanger 6 to transfer the cold energy to the fluid-phase medium and enter the third particle storage tank 13 in a normal-temperature form. At the same time, the normal-temperature particles in the third particle storage tank 13 are transported by another transport mechanism 7 into the first particle storage tank 11 for storage. After the heat exchange is completed, the normal-temperature particles in the first particle storage tank 11 enter the second particle storage tank 12 for storage by gravity drive;

[0030] Through the above cycle, the normal-temperature particles return to the second particle storage tank 12 during cold storage, completing a complete cycle of cold storage and cold release. Compared with traditional cold storage and cold release devices, this device can continuously store and release cold energy by setting multiple storage tanks in cooperation with conveyors. The response speed of the entire device is faster, and at the same time, the power consumption required during the cooling stage is less, and the operating cost is lower.

[0031] In one embodiment, the particles in the heat exchanger 6 are generally selected from common high specific heat capacity inert materials, such as quartz sand, basalt particles, etc. The materials and heat insulation measures of the four storage tanks are the same. The transport mechanism can be an elevator, a crane, or a lift. The first particle storage tank 11 and the second particle storage tank 12 on the heat exchanger 6 and the third particle storage tank 13 and the fourth particle storage tank 14 below the heat exchanger 6 can be installed horizontally, and the same effect can also be achieved. Generally, more than four storage tanks need to be interconnected to operate to achieve a similar effect, and all can be selected according to actual needs.

[0032] Furthermore, the heat exchanger 6 also includes an inlet distributor 61 and an outlet distributor 62. The inlet distributor 61 is respectively located at the top of the heat exchanger 6, and the outlet distributor 62 is located at the bottom of the heat exchanger 6. The inlet distributor 61 is connected to the bottom of the second particle storage tank 12, and the outlet distributor 62 is connected to the top of the third particle storage tank 13.

[0033] In this embodiment:

[0034] The inlet distributor 61 is used to evenly distribute the particles into the heat exchanger 6;

[0035] The outlet distributor 62 is used to introduce the particles into the third particle storage tank 13;

[0036] Specifically, the particles are evenly distributed into the heat exchanger 6 through the inlet distributor 61, and then after heat exchange in the heat exchanger 6, they enter the third particle storage tank 13 through the outlet distributor 62 for storage.

[0037] Furthermore, fluid inlet 63 and fluid outlet 64 pipelines are also provided on the heat exchanger 6.

[0038] In this embodiment:

[0039] The fluid inlet 63 and the fluid outlet 64 are used for passing heat exchange fluid;

[0040] Specifically, the heat exchanger 6 is provided with a fluid channel and a particle channel. The fluid channel and the particle channel can be in contact or not in contact with each other. The fluid can be a gas or a liquid. Generally, the heat exchanger 6 preferably has multiple groups of parallel vertical heat exchange pipes inside. The heat exchange form between the fluid and the particles is not limited. The heat exchange form of the heat exchanger 6 can be direct gas-solid contact heat exchange or wall heat exchange, and both can be selected according to actual needs.

[0041] Furthermore, it further includes a first valve 2 and a second valve 3. The first valve 2 is arranged between the bottom of the second particle storage tank 12 and the inlet distributor 61, and the second valve 3 is arranged between the outlet distributor 62 and the top of the third particle storage tank 13;

[0042] It further includes a third valve 4 and a fourth valve 5. The third valve 4 is located between the first particle storage tank 11 and the second particle storage tank 12, and the fourth valve 5 is located between the third particle storage tank 13 and the fourth particle storage tank 14.

[0043] In this embodiment:

[0044] The first valve 2 and the second valve 3 respectively control the on-off of the top and bottom of the heat exchanger 6;

[0045] The third valve 4 and the fourth valve 5 are used to control the on-off of the bottom of the first particle storage tank 11 and the top of the third particle storage tank 13;

[0046] Specifically, the valve can be selected according to the actual situation. It can be a ball valve, a gate valve, a butterfly valve or other types of valves. The valve can pass solid-phase media such as particles.

[0047] In summary, if the entire cold storage process is carried out during the discharge period and the cold release process is carried out during the charging period, then specifically as follows:

[0048] Discharging process: At the initial stage of the discharging period, which is also the initial stage of the cold storage process and the initial stage of the peak electricity period, all the normal-temperature particles are stored in the second particle storage tank 12, and all the valves are in the closed state. Subsequently, the first valve 2 and the second valve 3 are opened. The particles enter the heat exchanger 6 from the second particle storage tank 12 through the first valve 2 to complete the heat exchange process. Driven by gravity, the particles fully absorb the cold energy of the fluid-phase medium in the heat exchanger 6 and enter the third particle storage tank 13 through the second valve 3. Finally, the fourth valve 5 is opened, and the particles enter the fourth particle storage tank 14 from the third particle storage tank 13 by gravity-driven to store the cold energy. Finally, all the valves are closed.

[0049] Charging process: At the initial stage of the charging period, which is also the initial stage of cold energy release and the initial stage of the low valley electricity period, all the low-temperature particles are stored in the fourth particle storage tank 14, and all the valves are in the closed state. Subsequently, the low-temperature particles in the fourth particle storage tank 14 are transported to the second particle storage tank 12 by a transport mechanism 7. At the same time, the first valve 2 and the second valve 3 are opened. The low-temperature particles enter the heat exchanger 6 from the first valve 2 to complete the heat exchange process. The particles transfer the cold energy to the fluid in the heat exchanger 6 by gravity-driven and enter the third particle storage tank 13 in the form of normal temperature through the second valve 3. At the same time, the normal-temperature particles in the third particle storage tank 13 are transported to the first particle storage tank 11 for storage by another transport mechanism. After the heat exchange is completed, the first valve 2 is opened, and the normal-temperature particles enter the second particle storage tank 12 by gravity-driven for re-storage for subsequent cold energy storage again.

[0050] Of course, the present invention can also have many other implementation manners. Based on this implementation manner, other implementation manners obtained by those of ordinary skill in the art without any creative work belong to the scope protected by the present invention.

Claims

1. A large-scale continuous cold storage and release device, characterized in that, It includes a transport mechanism, a storage tank mechanism, and a heat exchanger, where: The storage mechanism includes a first particle storage tank, a second particle storage tank, a third particle storage tank, and a fourth particle storage tank. The bottom of the first particle storage tank is sequentially connected to the second particle storage tank, the heat exchanger, the third particle storage tank, and the fourth particle storage tank. The first particle storage tank, the second particle storage tank, the heat exchanger, the third particle storage tank, and the fourth particle storage tank are vertically arranged from top to bottom in sequence; The transport mechanism is located on both sides of the storage tank. One end of one transport mechanism is respectively connected to the first particle storage tank and the third particle storage tank, and the two ends of the other transport mechanism are respectively connected to the second particle storage tank and the fourth particle storage tank.

2. The large-scale continuous cold storage and release device according to claim 1, wherein The heat exchanger further includes an inlet distributor and an outlet distributor. The inlet distributor is respectively located at the top of the heat exchanger, and the outlet distributor is located at the bottom of the heat exchanger. The inlet distributor is connected to the bottom of the second particle storage tank, and the outlet distributor is connected to the top of the third particle storage tank.

3. The large-scale continuous cold storage and release device according to claim 2, wherein Fluid inlet and fluid outlet pipelines are also provided on the heat exchanger.

4. The large-scale continuous cold storage and release device according to claim 2, wherein It further includes a first valve and a second valve. The first valve is arranged between the bottom of the second particle storage tank and the inlet distributor, and the second valve is arranged between the outlet distributor and the top of the third particle storage tank.

5. The large-scale continuous cold storage and release device according to claim 4, characterized in that, It further includes a third valve and a fourth valve. The third valve is located between the first particle storage tank and the second particle storage tank, and the fourth valve is located between the third particle storage tank and the fourth particle storage tank.

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