Hot box

Abstract

The utility model discloses a hot box, which relates to the technical field of high-temperature solid oxide battery stacks, and comprises a box body, a cavity is arranged in the box body, the cavity can accommodate a stack, a thermal insulation layer is arranged in the cavity wall of the cavity, the box body comprises at least two wall plates, and the wall plates are detachably connected to form the box body. The box body is used for enabling a high-temperature solid oxide electric pile to utilize hydrogen as fuel to generate electricity in a high-temperature environment, all the wall plates are detachably connected, the electric pile and high-temperature equipment in the hot box can be conveniently maintained and replaced, all the wall plates of the box body can also be conveniently and respectively replaced, a heat preservation layer is arranged in the cavity wall of the cavity, and the heat preservation effect is good. And the thermal insulation performance of the hot box is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of high-temperature solid oxide battery stacks, in particular to a hot box. Background Art

[0002] High-temperature solid oxide fuel cell stacks need to use hydrogen as fuel to generate electricity in a high-temperature environment and convert chemical energy into electrical energy. In order to maintain a high-temperature environment (700-1000°C) and avoid heat loss, the fuel cell stack needs to be placed in a hot box. For example, Chinese utility model patent CN208433474U discloses a solid oxide fuel cell insulation structure, including a hollow closed structure insulation protection box and a solid oxide fuel cell and high-temperature equipment arranged in the insulation protection box. However, the insulation protection box is integrated and cannot be disassembled. Once problems occur inside the fuel cell stack and the high-temperature equipment, they need to be disassembled as a whole, which is inconvenient for inspection and replacement. In addition, during transportation or internal reaction, the protection box may be partially damaged. At this time, the entire protection box often needs to be replaced, resulting in waste. Utility Model Content

[0003] The purpose of the present invention is to provide a heat box to solve the problems existing in the above-mentioned prior art, so that the heat box can be disassembled, which facilitates the inspection and maintenance of the battery stack and high-temperature equipment inside the heat box and improves the thermal insulation performance of the heat box.

[0004] To achieve the above purpose, the present invention provides the following solutions:

[0005] The utility model provides a heat box, comprising a box body, wherein a cavity is provided in the box body, the cavity can accommodate a battery stack, a heat preservation layer is provided in the cavity wall of the cavity, and the box body comprises at least two wall panels, and the wall panels are detachably connected to form the box body.

[0006] Preferably, the thermal insulation layer is a nano-microporous plate or an aluminum silicate fiber plate.

[0007] Preferably, the wall panel includes a 310S stainless steel plate and a 304 stainless steel plate, the 310S stainless steel plate is used to be arranged on a side close to the cavity, and the 304 stainless steel plate is used to be arranged on a side away from the cavity, and the 310S stainless steel plate is used to be bent in the thickness direction and fixedly connected to the 304 stainless steel plate.

[0008] Preferably, the thermal insulation layer is arranged in a closed cavity formed by the 310S stainless steel plate and the 304 stainless steel plate, and two side surfaces of the thermal insulation layer are fixedly connected to the 310S stainless steel plate and the 304 stainless steel plate respectively.

[0009] Preferably, the wall panels are detachably connected via fasteners.

[0010] Preferably, it further comprises a hanging ring, which is fixedly connected to the outside of the box.

[0011] Preferably, it further includes a bracket, which is used to be fixedly connected to the battery stack, and the bracket is made of an insulating material. The bracket is fixed to the inner bottom wall of the box and is spaced apart from the inner side wall and the inner top wall of the box.

[0012] Compared with the prior art, the utility model has achieved the following technical effects:

[0013] The utility model provides a heat box, in which a cavity for accommodating a fuel cell stack is provided inside the box, for the high-temperature solid oxide fuel cell stack to generate electricity using hydrogen as fuel in a high-temperature environment. The wall panels of the box can be detachably connected, so the fuel cell stack and high-temperature equipment inside the heat box can be conveniently repaired and replaced, and the wall panels of the box can also be conveniently replaced separately. An insulation layer is provided in the wall of the cavity, which improves the thermal insulation performance of the heat box. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 Schematic diagram of the structure of a box in one embodiment;

[0016] Figure 2 Schematic diagram of the internal structure of a box in one embodiment;

[0017] Figure 3 is a schematic structural diagram of a first wall panel in one embodiment;

[0018] Figure 4 is a schematic structural diagram of a second wall panel in one embodiment;

[0019] Figure 5 is a schematic structural diagram of a third wall panel in one embodiment;

[0020] In the figure: 1-box; 2-cavity; 3-wall panel; 31-first wall panel; 32-second wall panel; 33-third wall panel; 4-lifting ring; 5-bracket; 6-fastener; 7-insulation layer. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] The purpose of the present invention is to provide a heat box to solve the problems existing in the above-mentioned prior art, so that the heat box can be disassembled, which facilitates the inspection and maintenance of the battery stack and high-temperature equipment inside the heat box and improves the thermal insulation performance of the heat box.

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0024] The utility model provides a hot box, such as Figure 1 and Figure 2 As shown, it includes a box body 1, a cavity 2 is provided in the box body 1, and the cavity 2 can accommodate a fuel cell stack for the high-temperature solid oxide fuel cell stack to use hydrogen as fuel to generate electricity in a high-temperature environment. The box body 1 includes at least two wall panels 3, and the wall panels 3 are detachably connected to form a box body, which can conveniently repair and replace the fuel cell stack and also conveniently replace the wall panels 3 of the box body 1. An insulation layer 7 is provided in the cavity wall of the cavity 2, which reduces the heat transfer coefficient of each wall panel 3 and improves the insulation performance of the hot box.

[0025] In another preferred embodiment of the present invention, the heat box further includes a preheater for preheating air before passing it into the cathode of the stack; a steam generator for generating steam; a mixer for mixing superheated steam with hydrogen; a heat exchanger for raising the temperature of the mixed gas before passing it into the anode of the stack, where the cathode and cathode gases undergo an electrochemical reaction within the stack, generating electrical energy; and a burner, where unreacted gas from the anode and residual oxidant from the cathode can be passed into the burner for combustion. The high-temperature gas generated by the combustion is used not only to preheat hydrogen and air, but also to provide the heat required by the steam generator. The preheater, steam generator, mixer, heat exchanger, and burner are disposed within cavity 2.

[0026] In another preferred embodiment of the present invention, one or more of the preheater, mixer, steam generator, heat exchanger and burner are arranged outside the cavity 2, and the cavity 2 is provided with connecting pipelines connected thereto, which can reduce the volume of the heat box.

[0027] In another preferred embodiment of the present invention, the insulation layer 7 is made of nano-microporous plate. This insulation material is light and resistant to high temperatures (≥1000°C). Its thermal conductivity is only 0.03W / mk at 800°C, which improves heat treatment efficiency and reduces energy consumption.

[0028] In another preferred embodiment of the present invention, the insulation layer 7 is made of aluminum silicate fiberboard. This insulation material has a thermal conductivity of only 0.07 W / mk at 800°C, has excellent insulation effect, and improves heat treatment efficiency.

[0029] In another more preferred embodiment of the present invention, the wall panel includes a 310S stainless steel plate and a 304 stainless steel plate. The 310S stainless steel plate is used to be arranged on the side close to the cavity, and the 304 stainless steel plate is used to be arranged on the side away from the cavity. The continuous use temperature of 310S stainless steel can reach 1150°C, and it has high strength in a high temperature environment. It is used to be arranged on the side close to the cavity 2 and can withstand the ambient temperature of the high-temperature solid oxide fuel cell stack producing hydrogen in a high temperature environment and using hydrogen as fuel for power generation. Due to the excellent thermal insulation properties of the nano-microporous plate or the aluminum silicate fiber plate, ordinary 304 stainless steel is used on the side of the wall panel away from the cavity to reduce manufacturing costs. The 310S stainless steel plate is used to bend in the thickness direction and fixedly connected to the 304 stainless steel plate, and a closed cavity can be formed inside.

[0030] In another preferred embodiment of the present invention, the insulation layer 7 is arranged in a closed cavity formed by a 310S stainless steel plate and a 304 stainless steel plate. The two side surfaces of the insulation layer 7 are fixedly connected to the 310S stainless steel plate and the 304 stainless steel plate by screws, respectively, to form a heat-insulating layer of the hot box. When the inside of the box is in a high temperature environment of 700-1000°C, the temperature outside the box is only 50°C.

[0031] In another preferred embodiment of the present invention, Figure 2 As shown, the wall panels are detachably connected via fasteners 6 , and the specific fasteners 6 may be screws, hinges, and locks, but are not limited thereto.

[0032] In another preferred embodiment of the present invention, Figures 3 to 5As shown, the box body is a square box body, and four wall panels 3 are provided, namely a first wall panel 31, two second wall panels 32 and a third wall panel 33. The first wall panel 31 is integrally formed by a bottom panel and two side panels, the two second wall panels 32 each include a side panel, and a third wall panel includes a top panel. The two second wall panels 32 are fixedly connected to the first wall panel 31 by fasteners, and a third wall panel 33 is fixedly connected to the first wall panel 31 and the second wall panel 32 by fasteners. Openings for accommodating gas pipelines are reserved on the wall panels 3 of the box body, and the wall panels 3 are detachably connected, which can conveniently repair and replace the battery stack and equipment inside the hot box, and can also conveniently replace the wall panels 3 of the box body.

[0033] In another more preferred embodiment of the present invention, the box body is a square box body, and there are 6 wall panels, namely a first wall panel, four second wall panels and a third wall panel. A first wall panel includes a bottom panel, four second wall panels each include a side panel, and a third wall panel includes a top panel. The four second wall panels are fixedly connected to the first wall panel by fasteners, and a third wall panel is fixedly connected to the four second wall panels by fasteners. Each wall panel is detachably connected to facilitate replacement and maintenance and replacement of the battery stack and equipment inside the hot box. The wall panels can also be freely combined and are not limited to the above forms.

[0034] In another more preferred embodiment of the present invention, the box body is a cylindrical box body, and the wall panel 3 includes a fourth wall panel, a fifth wall panel and a sixth wall panel. The fourth wall panel serves as the bottom panel of the box body, the fifth wall panel serves as the side panel of the box body and is cylindrical, and the sixth wall panel serves as the top panel of the box body. The fourth wall panel and the sixth wall panel are respectively detachably connected to the fifth wall panel by fasteners.

[0035] In another preferred embodiment of the present invention, Figure 2 As shown, it also includes a lifting ring 4, which is fixedly connected to the outside of the box body 1 and is used to lift the box body 1, which can facilitate the transportation and installation of the equipment and improve work efficiency. Preferably, there are 4 lifting rings to keep the hot box balanced and stable during lifting.

[0036] In another preferred embodiment of the present invention, Figure 2 As shown, it also includes a bracket 5, which is used to be fixedly connected to the battery stack. The bracket 5 is made of insulating material. The bracket 5 is fixed on the inner bottom wall of the box and is spaced apart from the inner side wall and the inner top wall of the box. It can also space the battery stack from the equipment or pipelines in the box so that the battery stack is in the same high-temperature environment all around. Preferably, the bracket 5 can be a hollow component composed of multiple rods to reduce heat conduction.

[0037] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A hot box, characterized in that: The box comprises a housing with a cavity therein, the cavity being capable of accommodating a battery stack, a heat preservation layer being provided in the cavity wall of the cavity, and the box comprising at least two wall panels, each of which is detachably connected to form the box.

2. The hot box according to claim 1, characterized in that: The heat-insulating layer is a nano-microporous plate or an aluminum silicate fiber plate.

3. The hot box according to claim 1, characterized in that: The wall panel includes a 310S stainless steel plate and a 304 stainless steel plate. The 310S stainless steel plate is used to be arranged on a side close to the cavity, and the 304 stainless steel plate is used to be arranged on a side away from the cavity. The 310S stainless steel plate is used to be bent in the thickness direction and fixedly connected to the 304 stainless steel plate.

4. The hot box according to claim 3, characterized in that: The thermal insulation layer is arranged in a closed cavity formed by the 310S stainless steel plate and the 304 stainless steel plate, and two side surfaces of the thermal insulation layer are fixedly connected to the 310S stainless steel plate and the 304 stainless steel plate respectively.

5. The hot box according to claim 1, characterized in that: The wall panels are detachably connected via fasteners.

6. The hot box according to claim 1, characterized in that: It also includes a lifting ring, which is fixedly connected to the outside of the box.

7. The heat box according to claim 1, characterized in that: It also includes a bracket, which is used to be fixedly connected to the battery stack. The bracket is made of an insulating material. The bracket is fixed to the inner bottom wall of the box and is spaced apart from the inner side wall and the inner top wall of the box.

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