Modularized spliced molten salt storage tank heat preservation device and method

Abstract

The invention relates to the technical field of fused salt heat storage, in particular to a modular spliced fused salt storage tank heat preservation device and method.The modular spliced fused salt storage tank heat preservation device comprises a tank body, mounting frames and elastic butt joint blocks, the multiple mounting frames are arranged on the periphery of the tank body, and the two ends of each mounting frame are each fixedly connected with a set of elastic butt joint blocks; wherein a plurality of groups of convex blocks are fixedly mounted on the lateral end face of one group of elastic butt-joint blocks, a plurality of groups of grooves are formed in the lateral end face of the other group of elastic butt-joint blocks, a plurality of groups of positioning grooves are formed in the upper end faces of the mounting frame and the elastic butt-joint blocks, positioning strips are correspondingly arranged on the lower end faces of the mounting frame and the elastic butt-joint blocks, and the positioning strips are matched with the positioning grooves. Horizontal butt joint of installation frames on the same layer is achieved through an embedded structure formed by the protruding blocks and the grooves till a complete annular wrapping structure is formed, the positioning strips and the positioning grooves form an axial guiding structure, accurate alignment in the vertical direction is achieved, and finally a modular heat preservation system covering the whole surface of a tank is formed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of molten salt heat storage, and particularly relates to a modularly spliced molten salt storage tank heat preservation device and method. BACKGROUND

[0002] In a solar thermal power generation system, a heat storage system uses molten salt as a heat storage medium to store excess heat energy captured by a solar heat collection field in a molten salt heat storage tank body, and releases the stored heat energy to drive a power generation unit when there is insufficient light or at night, thereby effectively extending the continuous operation time of the power station. In view of the wide temperature range of the molten salt operation, there is a significant temperature difference with the external environment. In order to suppress tank body heat loss and ensure system energy efficiency, efficient heat preservation design needs to be implemented on the heat storage tank body.

[0003] Traditional molten salt storage tank heat preservation structures are mostly of monolithic construction, such as cast-in-place insulation layers or integral cladding structures. When a local insulation layer is damaged, large-scale demolition and repair is required, significantly increasing maintenance costs. At the same time, due to the difference in the thermal expansion coefficients of the materials, monolithic structures are prone to stress concentration under temperature cycling, causing the risk of insulation layer cracking and deformation.

[0004] Therefore, in view of the above problems, a modularly spliced molten salt storage tank heat preservation device can be designed. The device is composed of several independent heat preservation module units, the inner wall shape of which is adapted to the outer wall of the storage tank, and the device is quickly and multi-layer positioned and assembled through the standardized splicing structure provided on the periphery of the module. The modular construction supports local quick replacement, significantly reducing maintenance costs, and the splicing gap of the module provides thermal expansion compensation space, effectively relieving the structural stress caused by temperature changes. SUMMARY

[0005] The present application provides a modularly spliced molten salt storage tank heat preservation device and method, which aims to overcome the problem that traditional molten salt storage tank heat preservation structures are mostly of monolithic construction, such as cast-in-place insulation layers or integral cladding structures. When a local insulation layer is damaged, large-scale demolition and repair is required, significantly increasing maintenance costs. At the same time, due to the difference in the thermal expansion coefficients of the materials, monolithic structures are prone to stress concentration under temperature cycling, causing the risk of insulation layer cracking and deformation.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions: The application discloses a modular spliced molten salt storage tank heat preservation device.

[0007] The cross section of the convex block, the concave groove, the positioning strip and the positioning groove is triangular.

[0008] The cross section of the convex block, the concave groove, the positioning strip and the positioning groove is triangular.

[0009] The heat preservation filling layer is aerogel.

[0010] The upper end of the supporting base is fixedly installed with a moisture-proof pad layer, the moisture-proof pad layer is fixedly installed with a heat insulation shell at the periphery, and the upper end of the heat insulation shell is also provided with a positioning groove.

[0011] The upper end of the supporting base is fixedly installed with a water distribution ring.

[0012] The water distribution ring is located at the periphery of the heat insulation shell.

[0013] The first glue strip is connected with the elastic abutting block and the installation frame through heat preservation nails.

[0014] The first glue strip is connected with the elastic abutting block and the installation frame through heat preservation nails.

[0015] The application further discloses a modular spliced molten salt storage tank heat preservation method. The heat preservation filling layer is filled in the installation frame to form a smallest heat insulation unit, the embedded structure formed by the convex block and the concave groove is used to realize horizontal abutment of installation frames in the same layer, until a complete annular coating structure is formed, the elastic abutting block is used as heat deformation to provide buffering, dynamic compensation space is provided for thermal expansion and cold contraction of the tank body during operation, the axial guide structure formed by the positioning strip and the positioning groove is used to realize accurate alignment in the vertical direction, the stacking installation precision of the multi-layer heat preservation module is ensured, and finally, a modular heat preservation system covering the whole surface of the tank body is formed.

[0016] Compared with the prior art, the application has at least the following beneficial technical effects: The application provides a modular spliced molten salt storage tank heat preservation device and method, a minimum heat insulation unit is formed by filling a heat preservation filling layer in a mounting frame, horizontal butt joint of mounting frames in the same layer is realized through a fitting structure formed by protrusions and grooves, until a complete annular cladding structure is formed, a dynamic compensation space for thermal expansion and cold contraction of the tank body in operation is provided through the elastic butt joint block as thermal deformation, axial guide structure is formed by the positioning strips and the positioning grooves, accurate alignment in the vertical direction is realized, the stacking installation precision of the multi-layer heat preservation modules is ensured, and finally a modular heat preservation system covering the whole surface of the tank body is formed, wherein the cross sections of the protrusions, the grooves, the positioning strips and the positioning grooves are all triangular, the non-symmetrical wedge-shaped splicing structure is formed through the triangular cross sections after the splicing of the protrusions and the grooves and the positioning strips and the positioning grooves is completed, the resistance of heat flow transfer in the joint area is effectively improved, and the modular layout can support quick replacement of a single mounting frame, thereby greatly reducing the maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the application or the technical solutions in the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0018] Figure 1 A three-dimensional structure schematic diagram of the modular spliced molten salt storage tank heat preservation device of the application is shown. Figure 2 A first three-dimensional structure schematic diagram of splicing of two groups of mounting frames of the modular spliced molten salt storage tank heat preservation device of the application is shown. Figure 3 A second three-dimensional structure schematic diagram of splicing of two groups of mounting frames of the modular spliced molten salt storage tank heat preservation device of the application is shown. Figure 4 A mounting frame cross-sectional three-dimensional structure schematic diagram of the modular spliced molten salt storage tank heat preservation device of the application is shown. Figure 5 A three-dimensional structure schematic diagram of explosion between the first layer mounting frame and the support foundation of the modular spliced molten salt storage tank heat preservation device of the application is shown.

[0019] Explanation of reference signs: 1, support foundation; 2, tank body; 3, moisture-proof cushion; 301, heat insulation shell; 302, drenching ring; 4, mounting frame; 401, thermal insulation filling layer; 5, elastic butt joint block; 501, protrusion; 502, groove; 601, positioning strip; 602, positioning groove; 7, first adhesive tape; 8, second adhesive tape. DETAILED DESCRIPTION

[0020] Hereinafter, only certain exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and the description are considered to be exemplary in nature rather than limiting.

[0021] In the description of the present application, it needs to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0022] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0023] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection, or communication; it can be directly connected, or indirectly connected through intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0024] In the present application, unless specifically stated and limited otherwise, the "on" or "under" of a first feature to a second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "on", "above" and "over" of a first feature to a second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the first feature is higher than the second feature in horizontal height. The "under", "below" and "underneath" of a first feature to a second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the first feature is lower than the second feature in horizontal height.

[0025] It should be understood that the terms "comprises" and "comprising", when used in this specification and the following claims, indicate the presence of the described features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0026] It should also be understood that the terms used in the present application specification are only for the purpose of describing particular embodiments and are not intended to limit the present application. As used in the present application specification and the following claims, the singular forms "a", "an" and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0027] It should be further understood that the term "and / or" used in the present application specification is intended to refer to any combination of one or more of the associated listed items and all possible combinations thereof, and includes these combinations.

[0028] Various structural diagrams according to the disclosed embodiments of the present application are shown in the accompanying drawings. These drawings are not drawn to scale, in which certain details are exaggerated for the purpose of clarity and certain details can be omitted. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are only exemplary, and in actuality can be deviated due to manufacturing tolerances or technical limitations, and regions / layers with different shapes, sizes and relative positions can be additionally designed by those skilled in the art according to actual needs.

[0029] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0030] Embodiment 1 Please refer to Figures 1 to 5The present invention provides a modular splicing molten salt storage tank insulation device, comprising a supporting foundation 1 and a tank body 2, an installation frame 4 and elastic docking blocks 5. The tank body 2 is fixedly installed on the upper end of the supporting foundation 1. Several installation frames 4 are provided around the tank body 2. The interior of the installation frames 4 is filled with an insulation filling layer 401. Both ends of the installation frames 4 are fixedly connected to a set of elastic docking blocks 5. One set of elastic docking blocks 5 has multiple sets of protrusions 501 fixedly installed on the side end face, and the other set of elastic docking blocks 5 has multiple sets of grooves 502. The grooves 502 correspond to the protrusions 501. The upper end face of the installation frame 4 and the elastic docking blocks 5 has multiple sets of positioning grooves 602, and the lower end face is provided with corresponding positioning strips 601. The positioning strips 601 and the positioning grooves 602 are matched.

[0031] In this embodiment, the cross-sections of the protrusion 501, the groove 502, the positioning strip 601, and the positioning slot 602 are all triangular.

[0032] In this embodiment, the triangular cross section can be used to form an asymmetrical wedge-shaped splicing structure after the protrusion 501 and the groove 502, and the positioning strip 601 and the positioning slot 602 are spliced ​​together.

[0033] In this embodiment, the thermal insulation filling layer 401 is made of aerogel.

[0034] In this embodiment, a moisture-proof pad 3 is fixedly installed on the upper end of the supporting base 1, and a heat-insulating shell 301 is fixedly installed on the periphery of the moisture-proof pad 3. A positioning groove 602 is also provided on the upper end of the heat-insulating shell 301.

[0035] In this embodiment, a water distribution ring 302 is fixedly installed on the upper end of the supporting foundation 1.

[0036] In this embodiment, the water-diffusing ring 302 is located on the periphery of the heat-insulating shell 301.

[0037] In this embodiment, a first adhesive strip 7 is provided around the joint of the two sets of interlocking elastic connecting blocks 5, and a second adhesive strip 8 is provided around the joint of the upper and lower mounting frames 4.

[0038] In this embodiment, both the first adhesive strip 7 and the second adhesive strip 8 are connected and fixed to the elastic docking block 5 and the mounting frame 4 respectively by thermal insulation nails.

[0039] Example 2 Please see Figure 1 , Figure 2 and Figure 3The application provides a modular spliced molten salt storage tank heat preservation device, which comprises a support base 1, a tank body 2, a mounting frame 4 and elastic butt blocks 5, the tank body 2 is fixedly installed at the upper end of the support base 1, a plurality of mounting frames 4 are arranged on the periphery of the tank body 2, both ends of the mounting frame 4 are fixedly connected with a group of elastic butt blocks 5, the lateral end face of one group of elastic butt blocks 5 is fixedly installed with a plurality of protruding blocks 501, the lateral end face of the other group of elastic butt blocks 5 is provided with a plurality of grooves 502, the grooves 502 correspond to the protruding blocks 501, a plurality of positioning grooves 602 are arranged on the upper end faces of the mounting frame 4 and the elastic butt blocks 5, and a positioning strip 601 is correspondingly arranged on the lower end face, and the positioning strip 601 and the positioning groove 602 are in a matching relationship; the mounting frame 4 is arranged to form the smallest heat insulation unit, the embedded structure formed by the protruding blocks 501 and the grooves 502 realizes the horizontal butt joint of the mounting frames 4 in the same layer, until a complete annular cladding structure is formed, the elastic butt blocks 5 serve as a thermal deformation buffer component, and provide a dynamic compensation space for thermal expansion and cold shrinkage of the tank body 2 during operation, the positioning strip 601 and the positioning groove 602 form an axial guide structure, precise alignment in the vertical direction is realized, the stacking installation precision of the multi-layer heat preservation modules is ensured, and finally a modular heat preservation system covering the whole surface of the tank body 2 is formed; the cross sections of the protruding blocks 501, the grooves 502, the positioning strip 601 and the positioning groove 602 are all triangular; the triangular cross sections are arranged, so that an asymmetric wedge-shaped splicing structure is formed after the splicing of the protruding blocks 501 and the grooves 502 and the positioning strip 601 and the positioning groove 602 is completed, and the resistance of heat flow transmission in the joint area is effectively improved.

[0040] Please refer to Figure 1 and Figure 4 In the embodiment, the mounting frame 4 is filled with a heat preservation filling layer 401, and the heat preservation filling layer 401 is aerogel; the joint peripheries of the two groups of spliced elastic butt blocks 5 are provided with first adhesive strips 7, and the joint peripheries of the upper and lower two layers of mounting frames 4 are provided with second adhesive strips 8; the first adhesive strips 7 and the second adhesive strips 8 are connected and fixed with the elastic butt blocks 5 and the mounting frames 4 respectively through heat preservation nails; the first adhesive strips 7 and the second adhesive strips 8 can shield and protect the splicing joints, and further hinder heat loss from the splicing joints.

[0041] Please refer to Figure 1 and Figure 5In the embodiment, the upper end of the support base 1 is fixedly installed with a moisture-proof pad 3, the periphery of the moisture-proof pad 3 is fixedly installed with a heat insulation shell 301, the upper end of the heat insulation shell 301 is also provided with a positioning groove 602, the upper end of the support base 1 is fixedly installed with a drenching ring 302, and the drenching ring 302 is located at the periphery of the heat insulation shell 301; the moisture-proof pad 3 provides a moisture-proof barrier for the installation frame 4, the heat insulation shell 301 effectively inhibits heat loss in the area of the moisture-proof pad 3, and cooperates with the preset positioning groove 602 at the top to realize accurate positioning and installation of the first-layer installation frame 4, and the drenching ring 302 can prevent rainwater from gathering at the connection between the heat insulation shell 301 and the support base 1.

[0042] Embodiment 3 Please refer to Figures 1 to 5 The application provides a modular splicing heat preservation method for a molten salt storage tank, which comprises the following steps of: The installation frame 4 is filled with a heat preservation filling layer 401 to form a smallest heat insulation and heat preservation unit, the matching structure formed by the protruding blocks 501 and the grooves 502 is used to realize horizontal butt joint of the installation frames 4 in the same layer, until a complete annular cladding structure is formed, the elastic butt joint blocks 5 are used as heat deformation buffers to provide dynamic compensation space for thermal expansion and contraction of the tank body 2 during operation, the axial guide structure formed by the positioning strips 601 and the positioning grooves 602 is used to realize accurate alignment in the vertical direction, so that the installation precision of the stacked heat preservation modules is ensured, and finally a modular heat preservation system covering the whole surface of the tank body 2 is formed, and the modular layout can support quick replacement of a single installation frame 4, thereby greatly reducing maintenance costs.

[0043] The cross sections of the protruding blocks 501, the grooves 502, the positioning strips 601 and the positioning grooves 602 are all triangular, the asymmetric wedge-shaped splicing structure can be formed after the protruding blocks 501 and the grooves 502 and the positioning strips 601 and the positioning grooves 602 are spliced by using the triangular cross sections, the resistance of heat flow transmission in the joint area is effectively improved, the first adhesive tape 7 and the second adhesive tape 8 can be used to shield and protect the splicing joints, and heat loss from the splicing joints is further hindered.

[0044] Through the above steps, the horizontal butt joint of the same layer installation frame 4 is realized through the fitting structure formed by the convex block 501 and the groove 502, until a complete annular cladding structure is formed, the elastic butt joint block 5 acts as a thermal deformation buffer component to provide dynamic compensation space for the thermal expansion and cold contraction of the tank body 2 in operation, the positioning strip 601 and the positioning groove 602 form an axial guide structure to realize accurate positioning in the vertical direction, and finally a modular thermal insulation system covering the whole surface of the tank body 2 is formed, and the modular layout can support quick replacement of a single installation frame 4, thereby greatly reducing the maintenance cost; to solve the problem that the traditional molten salt storage tank thermal insulation structure is mostly of an integral structure, such as a cast-in-place thermal insulation layer or an integral cladding structure, when the local thermal insulation layer is damaged, a large area needs to be removed and repaired, the operation and maintenance cost is significantly increased, and at the same time, due to the difference in the thermal expansion coefficient of the material, the integral structure is easy to produce stress concentration under the action of temperature cycle, thereby causing the risk of cracking and deformation of the thermal insulation layer.

[0045] In summary, the present application adopts a modular thermal insulation system to decompose the thermal insulation structure into multiple independent installation frame units. This design breaks the limitations of traditional integral structures, and each installation frame constitutes the smallest heat insulation unit, so that the thermal insulation structure can be flexibly assembled and adjusted according to the actual needs of the tank body, providing a universal thermal insulation solution for tank bodies of different specifications and shapes, greatly improving the universality and adaptability of the design. The present application realizes the horizontal butt joint of the same layer installation frame through the fitting structure formed by the convex block and the groove, and realizes the accurate positioning in the vertical direction through the axial guide structure formed by the positioning strip and the positioning groove. This double positioning design ensures the accuracy and stability of the installation frame during splicing, and can quickly and efficiently form a complete annular cladding structure to cover the whole surface of the tank body and provide all-round thermal insulation protection for the tank body. At the same time, the triangular cross-section design forms an asymmetric wedge-shaped splicing structure after splicing, effectively improving the resistance of heat flow transmission in the joint area and further enhancing the thermal insulation effect.

[0046] The basic principles and main features of the present application and the advantages of the present application have been shown and described above, and it is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be considered as limiting the claims involved.

[0047] Furthermore, it should be understood that although the specification is described in terms of embodiments, each of which contains only one independent technical solution, the specification is described in this way only for the sake of clarity, and the skilled person should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that the skilled person can understand. The above is only to illustrate the technical idea of the present application, and cannot limit the protection scope of the present application. Any modification made on the basis of the technical solutions according to the technical idea of the present application falls within the protection scope of the claims of the present application.

Claims

1. A modular, assembled molten salt storage tank insulation device, characterized in that, It includes a supporting foundation (1) and a tank (2), an installation frame (4) and elastic docking blocks (5). The tank (2) is fixedly installed on the upper end of the supporting foundation (1). Several installation frames (4) are provided around the tank (2). The interior of the installation frame (4) is filled with a thermal insulation filling layer (401). Both ends of the installation frame (4) are fixedly connected to a set of elastic docking blocks (5). One set of elastic docking blocks (5) has multiple sets of protrusions (501) fixedly installed on the side end face. The other set of elastic docking blocks (5) has multiple sets of grooves (502) on the side end face. The grooves (502) correspond to the protrusions (501). The upper end face of the installation frame (4) and the elastic docking blocks (5) has multiple sets of positioning grooves (602). The lower end face is provided with positioning strips (601). The positioning strips (601) and the positioning grooves (602) are matched.

2. The modular splicing molten salt storage tank insulation device according to claim 1, characterized in that, The cross-sections of the protrusion (501), groove (502), positioning strip (601) and positioning slot (602) are all triangular.

3. The modular splicing molten salt storage tank insulation device according to claim 2, characterized in that, The triangular cross section can be used to form an asymmetrical wedge splicing structure after the protrusion (501) and groove (502), and the positioning strip (601) and positioning groove (602) are spliced ​​together.

4. The modular splicing molten salt storage tank insulation device according to claim 1, characterized in that, The thermal insulation filling layer (401) is made of aerogel.

5. The modular splicing molten salt storage tank insulation device according to claim 1, characterized in that, A moisture-proof pad (3) is fixedly installed on the upper end of the supporting foundation (1), and a heat insulation shell (301) is fixedly installed on the outer periphery of the moisture-proof pad (3). A positioning groove (602) is also provided on the upper end of the heat insulation shell (301).

6. The modular splicing molten salt storage tank insulation device according to claim 5, characterized in that, A water distribution ring (302) is fixedly installed at the upper end of the supporting foundation (1).

7. The modular splicing molten salt storage tank insulation device according to claim 6, characterized in that, The water diffuser (302) is located on the periphery of the heat insulation shell (301).

8. The modular splicing molten salt storage tank insulation device according to claim 1, characterized in that, The outer perimeter of the joint of the two sets of interlocking elastic connecting blocks (5) is provided with a first adhesive strip (7), and the outer perimeter of the joint of the upper and lower mounting frames (4) is provided with a second adhesive strip (8).

9. A modularly assembled molten salt storage tank insulation device according to claim 8, characterized in that, Both the first adhesive strip (7) and the second adhesive strip (8) are connected and fixed to the elastic connecting block (5) and the mounting frame (4) respectively by thermal insulation nails.

10. A method for heat preservation of modularly assembled molten salt storage tanks, characterized in that, This method is based on a modularly assembled molten salt storage tank insulation device according to any one of claims 1 to 9, comprising: The installation frame (4) is filled with an insulation layer (401) to form the smallest heat insulation unit. The mounting frame (4) is horizontally connected by the interlocking structure formed by the protrusion (501) and the groove (502) until a complete ring-shaped covering structure is formed. The elastic connecting block (5) is used as a buffer for thermal deformation to provide dynamic compensation space for thermal expansion and contraction during the operation of the tank (2). The positioning strip (601) and the positioning groove (602) form an axial guiding structure to achieve precise vertical alignment and ensure the stacking installation accuracy of the multi-layer insulation modules. Finally, a modular insulation system covering the entire surface of the tank (2) is formed.

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