Solid heat accumulator capable of being transported by container and tower-shaped structure

Abstract

The utility model relates to a solid heat accumulator capable of being transported by a container and a tower-shaped structure, the solid heat accumulator is composed of solid heat storage units, the solid heat storage units are divided into three solid heat storage unit modules, the three solid heat storage unit modules are all built into multiple layers by heat storage bricks, row through holes are formed between every two layers of heat storage bricks, and the row through holes are communicated with the column through holes. According to the first solid heat storage unit module, three kinds of solid heat storage unit modules are distinguished through electric heating element placement in a through hole formed by building of the first solid heat storage unit module, and then a tower type structure is built through the three kinds of solid heat storage unit modules; by adopting the solid heat accumulator, the problem that the structure of the conventional solid heat accumulator is not suitable for being transported by a standard container can be solved; a tower type structure built by solid heat accumulators is adopted; and the electric heating elements in the solid heat storage unit can be connected to form a triangular wiring structure and a star-shaped wiring structure to be connected with a power grid power supply. The three-layer tower type structure is not provided with the electric heating elements in the orthographic projection of the highest layer.

Description

Technical Field

[0001] This utility model relates to the field of solid thermal storage structure technology, specifically to a solid thermal storage body and tower-shaped structure that can be transported in containers. Background Technology

[0002] Currently, solid-state electric thermal storage furnaces are generally divided into skid-mounted and field-installed structures. Due to limitations in space and the high-temperature dielectric properties of materials, skid-mounted equipment typically operates at 10kV or below, and the power of a single unit is generally less than 1000 kW. This has certain advantages for applications with low heat consumption and low power requirements. However, for applications with high heat consumption and power consumption in the tens or even hundreds of megawatts, the application of skid-mounted solid-state electric thermal storage furnaces becomes limited. This is because, under such conditions, the electric thermal storage furnace often needs to operate at high voltages, i.e., 35kV or even 110kV, which the skid-mounted structure cannot meet. At this point, on-site installation is the optimal solution. However, for overseas markets, the transportation of solid thermal accumulators presents challenges. Current technology involves on-site construction of solid thermal accumulators using approximately 10kg solid thermal accumulator bricks, requiring complex material preparation and a team capable of fully implementing the construction process. This is time-consuming, labor-intensive, and costly, and quality control is difficult. Finding experienced or skilled construction teams overseas is particularly challenging, posing numerous difficulties for the installation and delivery of solid electric thermal accumulators. Currently, there is a need to design a solid thermal accumulator that can be manufactured in a factory workshop, suitable for loading into standard containers and shipped to users. This would simplify the on-site installation process, reduce the installation and delivery costs of solid electric thermal accumulators, and facilitate the expansion of overseas export markets. Summary of the Invention

[0003] In view of the above technical requirements, the purpose of this utility model is to provide a solid heat storage body and tower structure that can be transported by container, in order to solve the problem that the structure of existing conventional solid heat storage bodies is not suitable for transportation by standard containers.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] Firstly, a solid thermal storage body that can be transported in a container is provided. The solid thermal storage body is composed of solid thermal storage units, which are structurally divided into a first solid thermal storage unit module, a second solid thermal storage unit module, and a third solid thermal storage unit module. The first, second, and third solid thermal storage unit modules are all constructed of multiple layers of thermal storage bricks, with through holes opened between each layer of thermal storage bricks. In the first solid thermal storage unit module, all the through holes formed by its construction are equipped with electric heating elements. In the second solid thermal storage unit module, the through holes on the same side of the horizontal 1 / 2 are equipped with electric heating elements. In the third solid thermal storage unit module, no electric heating elements are installed in the through holes formed by its construction.

[0006] Furthermore, the first, second, and third solid-state thermal energy storage unit modules are constructed from A-type, B-type, and C-type thermal energy storage bricks using mortar to form multi-layered standard unit modules. The A-type thermal energy storage bricks have two sets of parallel A-type grooves on two vertical surfaces, the B-type thermal energy storage bricks have two sets of parallel B-type grooves on two vertical surfaces, and the C-type thermal energy storage bricks have one set of C-type grooves on two vertical surfaces. In each layer, two C-type thermal energy storage bricks are attached side-by-side to both sides of the A-type thermal energy storage bricks, and two B-type thermal energy storage bricks are placed on top of the A-type and C-type thermal energy storage bricks. In the holes of each layer, the C-type and B-type grooves combine to form holes on both sides, and the A-type and B-type grooves combine to form two holes in the middle.

[0007] Furthermore, the heights of type A, type B, and type C heat storage bricks are the same.

[0008] Secondly, a tower-shaped structure employing a solid thermal storage body that can be transported in containers is provided. The tower-shaped structure is multi-layered. The outermost layer of the bottom solid thermal storage unit consists of third solid thermal storage unit modules, while the middle layer consists of first solid thermal storage unit modules. The top layer of the solid thermal storage unit consists entirely of first solid thermal storage unit modules. The outermost layer of the remaining solid thermal storage units consists of second solid thermal storage unit modules, while the middle layer consists of first solid thermal storage unit modules. The side of the second solid thermal storage unit module equipped with an electric heating element is arranged against the first solid thermal storage unit module. This forms a multi-layered tower-shaped structure in which the portion of the top layer's projection that is covered is equipped with an electric heating element, while the portion that is not covered is not equipped with an electric heating element.

[0009] Furthermore, the tower structure has 3, 4, or 5 layers.

[0010] Furthermore, the tower structure is built on an insulated foundation platform, on which solid heat storage unit module pads are laid, and then the solid heat storage units are stacked and installed in a tower shape to form the tower structure.

[0011] Furthermore, the aforementioned insulated foundation platform is set on the equipment foundation, supported by insulated pillars with the same operating voltage level as the solid thermal storage unit module, and constructed with magnesium oxide refractory bricks.

[0012] Furthermore, the module pad is a solid strip structure made of refractory material, which is set at the bottom of the solid heat storage unit module and can be connected to the top of two solid heat storage unit modules in the lower adjacent layer.

[0013] The technical solution adopted in this utility model has the following advantages:

[0014] This invention forms a modular heat storage body with a special structure, making it suitable for transport in standard containers. The solid heat storage body using the first, second, and third solid heat storage unit modules of this invention allows for transport using standard containers while maintaining structural stability within the container. Furthermore, the process of modularly constructing the solid heat storage units in the factory, transporting them in standard containers, and installing the modular tower-type solid heat storage units on-site improves production efficiency, ensures product quality, and enhances the advantages of high-voltage, high-power solid-state electric heat storage equipment in overseas markets.

[0015] Because of the first solid heat storage unit module, the second solid heat storage unit module and the third solid heat storage unit module in this utility model, a tower structure that can be installed on site becomes possible. The tower installation structure has a stable structure and a reasonable heat path design, thereby improving the thermal efficiency of the solid heat storage body. Attached Figure Description

[0016] The above and other objects, features, and advantages of the present invention will become readily understood by reading the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of the present invention are shown by way of example and not limitation, with the same or corresponding reference numerals denoteing the same or corresponding parts, wherein:

[0017] Figure 1 This is a schematic diagram of the tower structure construction process of this utility model;

[0018] Figure 2 This is a front view schematic diagram of the solid heat storage unit module of this utility model;

[0019] Figure 3This is a side view schematic diagram of the solid heat storage unit module of this utility model;

[0020] Figure 4 This is a schematic diagram of the first solid heat storage unit module of this utility model;

[0021] Figure 5 This is a schematic diagram of the second solid heat storage unit module of this utility model;

[0022] Figure 6 This is a schematic diagram of the third solid heat storage unit module of this utility model;

[0023] Figure 7 This is a schematic diagram of the three-layer combined structure of the field heat storage body of this utility model;

[0024] Figure 8 This is a schematic diagram of the five-layer combined structure of the field heat storage body of this utility model;

[0025] Explanation of icon numbers:

[0026] 1. Type A thermal storage brick, 2. Type B thermal storage brick, 3. Type C thermal storage brick, 4. Electric heating element, 5. Solid thermal storage unit module pad, 6. Insulated foundation platform, 7. Insulated support column, 10. Solid thermal storage unit, 10-1. First solid thermal storage unit module, 10-2. Second solid thermal storage unit module, 10-3. Third solid thermal storage unit module. Detailed Implementation

[0027] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Unless otherwise specified, the techniques used in the embodiments are conventional means well known to those skilled in the art.

[0028] It should be noted that, unless otherwise stated, the technical or scientific terms used in this invention should be understood in their ordinary sense by those skilled in the art to which this invention pertains. In this document, relational terms such as “first” and “second” are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The terms “connection”, “linked,” etc., should be interpreted broadly, for example, referring to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection via an intermediate medium. The terms “comprising,” “including,” or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase “comprising…” does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0029] This embodiment provides a solid thermal storage body and tower structure that can be transported in containers, such as Figures 1-8 As shown.

[0030] A solid thermal storage device that can be transported in a container includes a solid thermal storage unit 10. Figure 2 This is a front view schematic diagram of the solid heat storage unit 10. Figure 3 This is a side view of the solid thermal energy storage unit 10, which is divided into... Figure 4 The first solid thermal energy storage unit module 10-1 shown is Figure 5 The second solid thermal energy storage unit module 10-2 shown is Figure 6 The third solid heat storage unit module 10-3 shown is composed of type A heat storage bricks 1, type B heat storage bricks 2, and type C heat storage bricks 3, which are combined and built according to design requirements. Four rows of through holes are formed between each layer of heat storage bricks. In the first solid heat storage unit module 10-1, all four rows of holes formed by its construction are equipped with electric heating elements 4. In the second solid heat storage unit module 10-2, two of the four rows of holes formed by its construction are equipped with electric heating elements 4. In the third solid heat storage unit module 10-3, none of the four rows of holes formed by its construction are equipped with electric heating elements 4.

[0031] The three modules made by this utility model are easy to load into a standard container. The third solid heat storage unit module 10-3 does not have any electric heating element 4, while the second solid heat storage unit module 10-2 has an electric heating element 4 on one side and no electric heating element 4 on the other side. The above two types of solid heat storage units 10 can play a supporting role in the lower tower construction. If the first solid heat storage unit module 10-1 is used for the tower construction, it will cause difficulties in the design of the heat passage connection, or even be unnecessary.

[0032] The A-type heat storage brick 1 has two sets of parallel grooves on its vertical upper and lower surfaces. The B-type heat storage brick 2 is a vertical half-block structure of the A-type heat storage brick, and also has two sets of parallel grooves on its upper and lower surfaces. The C-type heat storage brick 3 is a horizontal half-block structure of the A-type heat storage brick 1, and also has the same set of grooves on its upper and lower surfaces. The solid heat storage unit module 10 is constructed by alternating two standard layers. The first standard layer is composed of C-type heat storage bricks 3 on both sides and A-type heat storage bricks 1 in the middle. The second standard layer is composed of B-type heat storage bricks 2 on both sides and A-type heat storage bricks 1 in the middle. Finally, the two standard layers are alternately constructed to form the solid heat storage unit module 10. In this embodiment of the invention, the thickness of the three types of heat storage bricks is the same as the cross-section of the reserved grooves, but the length and width are different.

[0033] Existing solid thermal storage furnaces with operating voltages ranging from 35kV to 110kV typically have a power output of 10MW to 100MW per unit, with the solid thermal storage body weighing between 600 tons and 8000 tons. If the solid thermal storage body is to be constructed on-site, it requires transporting loose A-type thermal storage bricks (1, B-type, and C-type) weighing 10kg to 20kg each to the installation site and manually constructing them on an insulated foundation platform (6). This method is more time-consuming, labor-intensive, and costly than the on-site tower hoisting solution of the solid thermal storage unit (10) proposed in this invention. It also presents greater challenges in controlling construction quality, especially considering the difficulty in finding skilled installation personnel at overseas installation sites to complete the delivery of the solid electric thermal storage furnace. The present invention manufactures solid thermal storage units 10 on a factory production line. Each solid thermal storage unit 10, weighing approximately 20 tons on average, is loaded into a container using lifting equipment. Transport pads and fixing measures are installed inside the container to ensure convenient, safe, and stable operation during loading, unloading, and transportation of the solid thermal storage units 10. The solid thermal storage units 10 are then transported to the equipment installation site via land or sea transportation, and installed using hoisting machinery and a small number of hoisting personnel.

[0034] A tower-shaped structure for solid thermal storage bodies that can be transported in containers. The tower-shaped structure is a multi-layered stack. When the bottom layer consists of N groups (N typically ranges from 8 to 150) of solid thermal storage units 10, the number of solid thermal storage units 10 groups in the top layer is N minus the number of layers in the tower structure plus 1. Thus, the solid thermal storage unit 10 fully covered by the orthographic projection of the top layer first solid thermal storage unit module 10-1 is the first solid thermal storage unit module 10-1; the solid thermal storage unit 10 covered by 1 / 2 of the orthographic projection of the top layer first solid thermal storage unit module 10-1 is the second solid thermal storage unit module 10-2; and the solid thermal storage unit 10 uncovered by the orthographic projection of the top layer first solid thermal storage unit module 10-1 is the third solid thermal storage unit module 10-3.

[0035] In embodiments of this utility model, the tower structure can also be two-layer, three-layer, four-layer, or five-layer, with a five-layer structure as follows: Figure 8 As shown, in the bottom layer of N groups of solid thermal energy storage units 10, the outermost two groups are third solid thermal energy storage unit modules 10-3, and the middle groups are first solid thermal energy storage unit modules 10-1; in the second layer of N-1 groups of solid thermal energy storage units 10, the outermost group is a third solid thermal energy storage unit module 10-3, the second group and the second to last group are second solid thermal energy storage unit modules 10-2, and the remaining groups are first solid thermal energy storage unit modules 10-1; in the third layer of N-2 groups of solid thermal energy storage units 10, the outermost group is a third solid thermal energy storage unit module 10-3, and the middle groups are first solid thermal energy storage unit modules 10-1; in the fourth layer... In the N-3 groups of solid thermal energy storage units 10, the outermost ones are all second solid thermal energy storage unit modules 10-2, and the middle ones are all first solid thermal energy storage unit modules 10-1; in the top N-2 groups of solid thermal energy storage units 10, all are equipped with first solid thermal energy storage unit modules 10-1; in the combination of second solid thermal energy storage unit modules 10-2 in the tower structure, the side with electric heating element 4 is arranged against the first solid thermal energy storage unit module 10-1; thus, the five-layer tower installation structure forms a three-layer tower structure in which the part covered by the top layer's orthogonal projection is equipped with electric heating element 4, and the part not covered by the top layer's orthogonal projection is not equipped with electric heating element 4.

[0036] This tower-shaped structure firstly maintains a stable structural state, ensuring a reliable thermally stable heat storage structure for the electric heating element 4 in the solid heat storage unit 10 when connected to a working power source. Secondly, because the outer layer of this tower-shaped structure is made of the second solid heat storage unit module 10-2 and the third solid heat storage unit module 10-3, it is equivalent to wrapping the first solid heat storage unit module 10-1, which contains the electric heating element 4, with an insulation layer. This reduces the lateral loss of the high-temperature heat energy stored inside the first solid heat storage unit module 10-1, ensuring efficient heat output from the holes in the solid heat storage unit 10. After the tower-shaped solid heat storage unit 10 is hoisted, the ends of the holes without the electric heating element 4 are sealed with high-temperature putty. Then, an insulating layer is installed on the two sides and top of the top-level first solid heat storage unit module 10-1, further improving the utilization rate of the electrothermal conversion of the solid heat storage unit module 10.

[0037] In this embodiment, a tower-type installation method for a solid thermal storage body that can be transported in a container is also provided. Figure 1 As shown, the solid thermal energy storage unit 10 is constructed, tested, and packaged in the factory workshop according to standard modules. The solid thermal energy storage unit modules are loaded into standard containers using lifting equipment and transported to the equipment installation site via land, sea, or other transportation methods. Once the container is transported to the project site, the solid thermal energy storage unit 10 is moved out of the container as a whole and installed on the site using methods such as hoisting. Solid thermal energy storage unit module pads 5 are then laid on the insulating foundation platform 6, and the solid thermal energy storage unit 10 is stacked in a tower shape to form a tower structure.

[0038] In the embodiments of this utility model, the overall tower-shaped stacking installation of the solid heat storage unit 10 is carried out by first placing the first layer of N groups of solid heat storage units 10 on the insulating base platform 6, then installing the second layer of N-1 groups of solid heat storage units 10 on top of the first layer of N groups of solid heat storage units 10, and then placing the N-2 groups of solid heat storage units 10 on top of the second layer of N-1 groups of solid heat storage units 10 as the third layer, thus forming a three-layer tower structure, and gaps are provided between the solid heat storage units 10 in each layer.

[0039] In this embodiment, Figure 7This is a schematic diagram of a three-layer combined structure of the on-site heat storage body. The tower installation method of this utility model can be configured to build two, three, four, or five layers. In this utility model, a three-layer tower-type integral stacking method is adopted. That is, solid heat storage units 10 are placed on the platform foundation consisting of insulating support columns 7 and insulating foundation platforms 6 that has been constructed. According to the design, N sets of solid heat storage units 10 are placed on the first layer, N-1 sets of solid heat storage units 10 are placed on the second layer, and N-2 sets of solid heat storage units 10 are placed on the third layer. There are gaps between the solid heat storage unit modules in each layer. At the same time, solid heat storage unit module pads 5 are pre-placed under each set of solid heat storage units 10 during installation.

[0040] In this embodiment, during the assembly of the solid thermal energy storage unit module, the first standard layer is laid horizontally in a combination of C-type thermal energy storage bricks 3, A-type thermal energy storage bricks 1, and C-type thermal energy storage bricks 3, and the second standard layer is laid vertically in a combination of B-type thermal energy storage bricks 2, A-type thermal energy storage bricks 1, and B-type thermal energy storage bricks 2. The two standard layers are then alternately laid to form the final cuboid solid thermal energy storage unit module 10, and a through hole is formed between the two standard layers. Each solid thermal energy storage unit module 10 is constructed by laying 12-20 standard layers with mortar. In the embodiment of the present invention, a solid thermal energy storage unit 10 with a 12-layer thermal energy storage brick structure is preferred.

[0041] In the above installation steps, the testing involves checking the overall handling and bonding strength between the solid thermal energy storage unit modules, as well as the compliance of the materials and geometric dimensions; the packaging involves dustproofing and waterproofing the solid thermal energy storage unit modules, and the outer packaging shell structure.

[0042] The insulated foundation platform 6 is set on the equipment foundation, supported by insulated pillars 7 with the same working voltage level as the solid heat storage unit module, and constructed with magnesium oxide refractory bricks; the solid heat storage unit module pad 5 is a solid strip structure made of refractory material, set at the bottom of the solid heat storage unit module, and can be connected to the top of the two solid heat storage unit modules in the lower adjacent layer.

[0043] By adopting a process of modular production of solid thermal energy storage units in the factory, standard container transportation of solid thermal energy storage unit modules, and on-site modular assembly of solid thermal energy storage units, production efficiency is improved, product quality is guaranteed, and the advantages of high-voltage, high-power solid thermal energy storage equipment in overseas expansion are enhanced.

[0044] Because of the first solid heat storage unit module, the second solid heat storage unit module and the third solid heat storage unit module in this utility model, a tower structure that can be installed on site becomes possible. The tower installation structure has a stable structure, and this structural method makes the heat path design simple and reasonable, and also improves the thermal efficiency of the solid heat storage body.

[0045] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A solid heat storage body that can be transported in containers, characterized in that, The solid heat storage body is composed of solid heat storage units (10). The solid heat storage units (10) are divided into a first solid heat storage unit module (10-1), a second solid heat storage unit module (10-2), and a third solid heat storage unit module (10-3). The first solid heat storage unit module (10-1), the second solid heat storage unit module (10-2), and the third solid heat storage unit module (10-3) are all constructed of multiple layers of heat storage bricks. Four rows of through holes are opened between each layer of heat storage bricks. In the first solid heat storage unit module (10-1), all the through holes formed by its construction are equipped with electric heating elements (4). In the second solid heat storage unit module (10-2), the through holes on the same side of the horizontal 1 / 2 are equipped with electric heating elements (4). In the third solid heat storage unit module (10-3), no electric heating elements (4) are installed in the through holes formed by its construction.

2. The solid heat storage body that can be transported in containers according to claim 1, characterized in that, The first solid thermal storage unit module (10-1), the second solid thermal storage unit module (10-2), and the third solid thermal storage unit module (10-3) are multi-layered standard unit modules constructed by combining type A thermal storage bricks (1), type B thermal storage bricks (2), and type C thermal storage bricks (3) with mortar. Among them, the type A thermal storage brick (1) has two sets of parallel grooves on its upper and lower vertical surfaces, and the type B thermal storage brick (2) is a vertical half-block structure of the type A thermal storage brick (1), and has the same two sets of parallel grooves on its upper and lower surfaces. The groove, the C-type heat storage brick (3) is a horizontal half-block structure of the A-type heat storage brick (1), and the same set of grooves are provided on the upper and lower surfaces; the solid heat storage unit module is constructed by alternating two standard layers, wherein the first standard layer is composed of C-type heat storage bricks (3) on both sides and A-type heat storage bricks (1) in the middle, and the second standard layer is composed of B-type heat storage bricks (2) on both sides and A-type heat storage bricks (1) in the middle. Finally, the two standard layers are constructed alternately to form the solid heat storage unit module.

3. A tower-type structure employing the solid thermal storage body capable of being transported in containers as described in claim 1, characterized in that, When the tower structure is multi-layered and the bottom layer consists of N groups of solid thermal storage units (10), the number of groups of the first solid thermal storage unit module (10-1) of the top layer is equal to N minus the number of layers of the tower structure plus 1. Thus, each lower solid thermal storage unit (10) fully covered by the orthographic projection of the top layer first solid thermal storage unit module (10-1) is the first solid thermal storage unit module (10-1); each lower solid thermal storage unit (10) covered by 1 / 2 of the orthographic projection of the top layer first solid thermal storage unit module (10-1) is the second solid thermal storage unit module (10-2); and each lower solid thermal storage unit (10) not covered by the orthographic projection of the top layer first solid thermal storage unit module (10-1) is the third solid thermal storage unit module (10-3).

4. The tower-shaped structure of the solid thermal storage body that can be transported by container according to claim 3, characterized in that, The tower structure consists of 2, 3, 4, or 5 layers.

5. The tower-shaped structure of the solid thermal storage body that can be transported by container according to claim 3, characterized in that, The number of electric heating elements (4) in each solid heat storage unit (10) is the same. The electric heating elements (4) in the vertical direction have a sequential correspondence. The arrangement of the electric heating elements (4) is a matrix structure. The electric heating elements (4) can be connected in a delta connection structure or a star connection structure to be connected to the power grid.

6. The tower-shaped structure of the solid thermal storage body that can be transported in containers according to claim 3, characterized in that, The tower structure is built on an insulated foundation platform (6). Solid heat storage unit module pads (5) are laid on the insulated foundation platform (6), and then the solid heat storage units (10) are stacked and installed in a tower shape to form a tower structure.

7. The tower-shaped structure of the solid thermal storage body capable of being transported in containers according to claim 6, characterized in that, The aforementioned insulating foundation platform (6) is a platform set on the equipment foundation, supported by insulating pillars (7) with the same working voltage level as the solid heat storage unit module, and constructed with magnesium oxide refractory bricks.

8. The tower-shaped structure of the solid thermal storage body capable of being transported in containers according to claim 6, characterized in that, The solid heat storage unit module pad (5) is a solid strip structure made of refractory material, which is set at the bottom of the solid heat storage unit module and can be connected to the top of the two solid heat storage unit modules in the lower adjacent layer.

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