SOFC (solid oxide fuel cell) system gas inlet and outlet device and module

Abstract

The utility model provides an SOFC (Solid Oxide Fuel Cell) system gas inlet and outlet device and module, and belongs to the field of fuel cells. The device comprises a box body, an electric pile group fuel gas inlet pipe and an electric pile group air inlet pipe are arranged on one side of the top of the box body, an electric pile group fuel gas outlet pipe and an electric pile group air outlet pipe are arranged on the other side of the top of the box body, and a first cavity, a second cavity, a third cavity and a fourth cavity are formed in the box body; the first cavity, the second cavity, the third cavity and the fourth cavity are separated from one another, and a galvanic pile hole group is formed in the bottom of the box body and comprises a galvanic pile group fuel gas inlet hole, a galvanic pile group air inlet hole, a galvanic pile group fuel gas outlet hole and a galvanic pile group air outlet hole. By adopting the SOFC system gas inlet and outlet device and the SOFC system gas inlet and outlet module provided by the embodiment of the utility model, the problems that in the prior art, external pipelines are staggered and miscellaneous, the arrangement of the pipelines is complicated, the occupied space is large, the installation difficulty is high, and the assembly efficiency and the maintenance difficulty of the SOFC system are influenced can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to fuel cell field, especially a kind of SOFC system air inlet and outlet device and module. BACKGROUND

[0002] Solid Oxide Fuel Cell (SOFC) is a kind of full solid chemical power generation device, which can convert chemical energy stored in fuel and oxidant into electric energy efficiently and environmentally friendly at medium-high temperature. In working condition, fuel gas and air are needed to be input into the stack to convert chemical energy into electric energy.

[0003] In prior art, due to small sintering size of SOFC cell reaction zone, single stack power is small, which cannot meet the design requirement of high-power system. Currently, multiple stacks are connected in series and parallel to design system to improve the total output power of stack. When multiple stacks connected in series and parallel are input with raw material fuel gas and air, multiple separate pipes are usually used to connect with multiple stack pipe mouths.

[0004] In prior art, air inlet and outlet device is usually connected with multiple stacks by multiple separate pipes, which causes multiple pipes to be staggered and complicated, and the arrangement of pipes is complex, which occupies large space and has high installation difficulty, and affects the assembly efficiency and maintenance difficulty of SOFC system. UTILITY MODEL CONTENT

[0005] The utility model embodiment provides a kind of SOFC system air inlet and outlet device and module, can solve the problem that external pipe is staggered and complicated in prior art, the arrangement of pipe is complex, and it occupies large space and has high installation difficulty, and affects the assembly efficiency and maintenance difficulty of SOFC system. The technical scheme is as follows:

[0006] First, a kind of SOFC system air inlet and outlet device, comprising: box body,

[0007] The top side of the box body is provided with a fuel cell stack gas inlet pipe and a fuel cell stack air inlet pipe, the other side is provided with a fuel cell stack gas outlet pipe and a fuel cell stack air outlet pipe, the inside of the box body is provided with a first cavity, a second cavity, a third cavity and a fourth cavity which are isolated from each other, the bottom of the box body is provided with a fuel cell stack hole group, the fuel cell stack hole group includes a fuel cell stack gas inlet hole, a fuel cell stack air inlet hole, a fuel cell stack gas outlet hole and a fuel cell stack air outlet hole, the fuel cell stack gas inlet hole and the fuel cell stack gas inlet pipe are connected through the first cavity, the fuel cell stack air inlet hole and the fuel cell stack air inlet pipe are connected through the second cavity, the fuel cell stack gas outlet hole and the fuel cell stack gas outlet pipe are connected through the third cavity, and the fuel cell stack air outlet hole and the fuel cell stack air outlet pipe are connected through the fourth cavity.

[0008] Optionally, the fuel cell stack hole group is provided with multiple groups, and the multiple groups of fuel cell stack holes are arranged in a rectangular array at the bottom of the box body.

[0009] Optionally, the first cavity, the second cavity, the third cavity and the fourth cavity are each provided with an insulation layer.

[0010] Optionally, the insulation layer is a stainless steel piece.

[0011] Optionally, a stepped groove is formed at the top side of the box body, and the fuel cell stack gas inlet pipe and the fuel cell stack air inlet pipe are arranged on the stepped groove.

[0012] Optionally, a plurality of fuel cell stack gas inlet pipes and a plurality of fuel cell stack air inlet pipes are arranged on the stepped groove.

[0013] Optionally, it further comprises a first plug and a second plug, the first plug matches the fuel cell stack gas inlet pipe, and the second plug matches the fuel cell stack air inlet pipe.

[0014] In the second aspect, a SOFC system gas inlet and outlet module comprises the SOFC system gas inlet and outlet device described above, and further comprises a fuel cell stack, the fuel cell stack is provided with a fuel gas inlet pipe, an air inlet pipe, a fuel gas outlet pipe and an air outlet pipe, the fuel gas inlet pipe matches the fuel cell stack gas inlet hole, the air inlet pipe matches the fuel cell stack air inlet hole, the fuel gas outlet pipe matches the fuel cell stack gas outlet hole, and the air outlet pipe matches the fuel cell stack air outlet hole.

[0015] Optionally, the fuel gas inlet pipe, the air inlet pipe, the fuel gas outlet pipe and the air outlet pipe are provided with sealing pieces at the connection with the fuel cell stack hole group.

[0016] Optionally, the gas inlet pipe, the air inlet pipe, the gas outlet pipe and the air outlet pipe are detachably connected with the stack.

[0017] The technical scheme provided by the embodiment of the utility model has at least the following beneficial effects:

[0018] The SOFC system gas inlet and outlet device and module provided by the embodiment of the utility model connects the stack group gas inlet hole and the stack group gas inlet pipe through the first cavity, connects the stack group air inlet hole and the stack group air inlet pipe through the second cavity, connects the stack group gas outlet hole and the stack group gas outlet pipe through the third cavity, and connects the stack group air outlet hole and the stack group air outlet pipe through the fourth cavity, so that the external gas pipe and the stack group gas inlet pipe are connected, the external air pipe and the stack group air inlet pipe are connected, gas and air can be provided for multiple stacks, the gas and air are discharged through the stack group gas outlet pipe and the stack group air outlet pipe after reacting in the stack, so that the device can replace multiple separate pipes to connect multiple stacks, the problem of the external pipe being staggered and complicated in the prior art is effectively solved, the arrangement of the pipe is complex, the space is occupied and the installation difficulty is great, and the assembly efficiency and the maintenance difficulty of the SOFC system are affected. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the drawings needed in the embodiment description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the drawings without creative labor for those skilled in the art.

[0020] Figure 1 It is the device overall structure schematic diagram provided by the embodiment of the utility model;

[0021] Figure 2 It is the device bottom structure schematic diagram provided by the embodiment of the utility model;

[0022] Figure 3 It is the first cavity cross section schematic diagram provided by the embodiment of the utility model;

[0023] Figure 4 It is the second cavity cross section schematic diagram provided by the embodiment of the utility model;

[0024] Figure 5 It is the third cavity cross section schematic diagram provided by the embodiment of the utility model;

[0025] Figure 6 It is the fourth cavity cross section schematic diagram provided by the embodiment of the utility model;

[0026] Figure 7 is another device overall structure schematic view provided by the embodiment of the present application;

[0027] Figure 8 is a module overall structure schematic view provided by the embodiment of the present application;

[0028] Figure 9 is a stack structure schematic view provided by the embodiment of the present application;

[0029] Figure 10 is a module overhead schematic view provided by the embodiment of the present application;

[0030] Figure 11 is the A-A cross section schematic view of Figure 10 ;

[0031] Figure 12 is the B-B cross section schematic view of Figure 10 .

[0032] In the figure: 1 - box body; 101 - first cavity; 102 - second cavity; 103 - third cavity; 104 - fourth cavity; 11 - stack group gas inlet pipe; 12 - stack group air inlet pipe; 13 - stack group gas outlet pipe; 14 - stack group air outlet pipe; 15 - stack hole group; 151 - stack group gas inlet hole; 152 - stack group air inlet hole; 153 - stack group gas outlet hole; 154 - stack group air outlet hole; 16 - insulation layer; 17 - step groove; 18 - first plug; 19 - second plug; 2 - stack; 21 - gas inlet pipe; 22 - air inlet pipe; 23 - gas outlet pipe; 24 - air outlet pipe. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the present application more clear, the following will combine the drawings to make further detailed description on the embodiment of the present application.

[0034] Figure 1 is a device overall structure schematic view provided by the embodiment of the present application; Figure 2 is a device bottom structure schematic view provided by the embodiment of the present application; Figure 3 is a first cavity cross section schematic view provided by the embodiment of the present application; Figure 4 is a second cavity cross section schematic view provided by the embodiment of the present application; Figure 5 is a third cavity cross section schematic view provided by the embodiment of the present application; Figure 6 is a fourth cavity cross section schematic view provided by the embodiment of the present application; Figure 7 is another device overall structure schematic view provided by the embodiment of the present application;Figure 8 This is a schematic diagram of the overall structure of the module provided in this embodiment of the utility model; Figure 9 This is a schematic diagram of the fuel cell stack structure provided in an embodiment of the present invention; Figure 10 This is a top view schematic diagram of the module provided in this embodiment of the utility model; Figure 11 This is provided by the embodiment of the present utility model. Figure 10 Schematic diagram of the cross-section at point AA; Figure 12 This is provided by the embodiment of the present utility model. Figure 10 A schematic diagram of the cross-section at point BB. (See diagram below.) Figures 1 to 12 The SOFC system inlet and outlet device shown includes: a housing 1, with a fuel cell stack gas inlet pipe 11 and a fuel cell stack air inlet pipe 12 disposed on one side of the top of the housing 1, and a fuel cell stack gas outlet pipe 13 and a fuel cell stack air outlet pipe 14 disposed on the other side; the housing 1 has a first cavity 101, a second cavity 102, a third cavity 103 and a fourth cavity 104 that are isolated from each other; and a fuel cell stack hole group 15 is opened at the bottom of the housing 1, the fuel cell stack hole group 15 including a fuel cell stack gas inlet hole 151 and a fuel cell stack air outlet hole 154. The fuel cell stack gas outlet port 152, fuel cell stack gas outlet port 153, and fuel cell stack air outlet port 154 are connected through the first cavity 101, the fuel cell stack gas inlet port 151 and the fuel cell stack gas inlet pipe 11 are connected through the second cavity 102, the fuel cell stack gas outlet port 153 and the fuel cell stack gas outlet pipe 13 are connected through the third cavity 103, and the fuel cell stack air outlet port 154 and the fuel cell stack air outlet pipe 14 are connected through the fourth cavity 104.

[0035] Exemplarily, in the embodiment of the utility model, the external gas pipeline is connected with the fuel cell stack gas inlet pipe 11, and the external air pipeline is connected with the fuel cell stack air inlet pipe 12. At this time, the gas delivery process is that the gas enters the first cavity 101 through the fuel cell stack gas inlet pipe 11, enters the fuel cell 2 through the fuel cell stack gas inlet hole 151 to react, and then enters the third cavity 103 through the fuel cell stack gas outlet hole 153 after the reaction, and finally is discharged from the fuel cell stack gas outlet pipe 13. At this time, the air delivery process is that the air enters the second cavity 102 through the fuel cell stack air inlet pipe 12, enters the fuel cell 2 through the fuel cell stack air inlet pipe 12 to react, and then enters the fourth cavity 104 through the fuel cell stack air outlet hole 154 after the reaction, and finally is discharged from the fuel cell stack air outlet pipe 14. Since the first cavity 101, the second cavity 102, the third cavity 103 and the fourth cavity 104 are separated from each other, by arranging the structure, the complex external pipeline in the prior art can be reduced, and by arranging a box body 1 as a whole, the air and the gas can be delivered to the fuel cell 2, and the air and the gas can be isolated. When the air and the gas are reacted in the fuel cell 2, they can also be delivered out of the single space. In the embodiment, the box body 1 is divided into four separate cavities to achieve the above purposes, so that the input air and the input gas are separated from the output air and the output gas, and no additional pipeline needs to be connected, so that the simplicity of the entire SOFC system is ensured, and safety hazards caused by too many external pipelines are prevented.

[0036] The SOFC system inlet and outlet gas device and module provided by the embodiment of the utility model connect the fuel cell stack gas inlet hole 151 and the fuel cell stack gas inlet pipe 11 through the first cavity 101, connect the fuel cell stack air inlet hole 152 and the fuel cell stack air inlet pipe 12 through the second cavity 102, connect the fuel cell stack gas outlet hole 153 and the fuel cell stack gas outlet pipe 13 through the third cavity 103, and connect the fuel cell stack air outlet hole 154 and the fuel cell stack air outlet pipe 14 through the fourth cavity 104. At this time, only the external gas pipeline needs to be connected with the fuel cell stack gas inlet pipe 11, and the external air pipeline needs to be connected with the fuel cell stack air inlet pipe 12, so that the gas and the air can be provided for multiple fuel cells 2. After the gas and the air react in the fuel cell 2, they are discharged through the fuel cell stack gas outlet pipe 13 and the fuel cell stack air outlet pipe 14 respectively, so that the device can replace multiple separate pipelines to connect multiple fuel cells 2, thereby effectively solving the problems of the external pipeline in the prior art, such as the complex arrangement of the pipeline, the large occupied space, the high installation difficulty, the low assembly efficiency of the SOFC system and the high maintenance difficulty.

[0037] Optionally, the fuel cell hole group 15 is provided in multiple groups, and the multiple groups of fuel cell hole groups 15 are arranged in a rectangular array at the bottom of the box body 1.

[0038] Exemplarily, in the embodiment of the utility model, as shown in Figure 2 As shown, six groups of electric pile hole groups 15 are arranged, and at most six electric piles 2 are connected. By arranging multiple electric pile hole groups 15, the device can be connected to multiple electric piles 2, so that multiple electric piles 2 are connected in series and parallel, thereby improving the power generation of the overall SOFC system. By arranging multiple electric pile hole groups 15, the practicability of the device is improved.

[0039] Optionally, an insulating layer 16 is arranged between the first cavity 101, the second cavity 102, the third cavity 103 and the fourth cavity 104.

[0040] Exemplarily, in the embodiment of the utility model, the temperature in the electric pile reaction is usually high. By arranging the insulating layer 16, complete insulation between the first cavity 101, the second cavity 102, the third cavity 103 and the fourth cavity 104 can be ensured, so that the air and the fuel gas do not meet to cause combustion reaction or explosion, thereby ensuring the stability of the device.

[0041] Optionally, the insulating layer 16 is a stainless steel part.

[0042] Exemplarily, in the embodiment of the utility model, the insulating layer 16 can be made of 310S stainless steel, which has good oxidation resistance and stable structure below 1150℃, and has high strength under high temperature conditions, so as to ensure the structural strength of the device, and has good weldability, facilitating welding and assembly.

[0043] Optionally, a stepped groove 17 is formed on one side of the top of the box body 1, and the electric pile group fuel gas inlet pipe 11 and the electric pile group air inlet pipe 12 are arranged on the stepped groove 17.

[0044] Exemplarily, in the embodiment of the utility model, as shown in Figure 1 By arranging the stepped groove 17, on the one hand, the manufacturing material of the box body 1 can be reduced to reduce the production cost, and on the other hand, the inlet pipe and the outlet pipe can be easily identified and distinguished by the operator through the stepped groove 17, that is, the pipe on the stepped groove 17 is the inlet pipe, and the pipe on the large plane on the top of the box body 1 is the outlet pipe. The stepped groove 17 is a kind of foolproof design, which prevents the operator from confusing the inlet and outlet pipes during assembly, thereby improving the operation convenience of the device.

[0045] Optionally, multiple electric pile group fuel gas inlet pipes 11 and multiple electric pile group air inlet pipes 12 are arranged on the stepped groove 17.

[0046] Exemplarily, in the embodiment of the utility model, as shown in Figure 7As shown, by setting multiple stack group gas inlet pipes 11 and multiple stack group air inlet pipes 12, when one of the stack group gas inlet pipes 11 or the stack group air inlet pipes 12 is blocked or damaged, the inside of the box 1 can still be supplied with gas or air through the other stack group gas inlet pipes 11 or the stack group air inlet pipes 12, thereby improving the service life of the device. On the other hand, when the device is connected to too many stacks, the reaction gas can be input to multiple stack group gas inlet pipes 11 and multiple stack group air inlet pipes 12 at the same time, so that the reaction gas supplied to multiple stacks 2 is more uniform, thereby improving the delivery efficiency of the device.

[0047] Optionally, it also includes a first plug 18 and a second plug 19, the first plug 18 is matched with the stack group gas inlet pipe 11, and the second plug 19 is matched with the stack group air inlet pipe 12.

[0048] Exemplarily, in the embodiment of the utility model, as shown in the figure, Figure 7 When some of the stack group gas inlet pipes 11 or the stack group air inlet pipes 12 are not used, they can be plugged by setting the first plug 18 and the second plug 19, thereby preventing the leakage of the delivered reaction gas, and further improving the practicality of the device.

[0049] A SOFC system gas inlet and outlet module, comprising the SOFC system gas inlet and outlet device, further comprising a stack 2, the stack 2 is provided with a gas inlet pipe 21, an air inlet pipe 22, a gas outlet pipe 23 and an air outlet pipe 24, the gas inlet pipe 21 is matched with the stack group gas inlet hole 151, the air inlet pipe 22 is matched with the stack group air inlet hole 152, the gas outlet pipe 23 is matched with the stack group gas outlet hole 153, and the air outlet pipe 24 is matched with the stack group air outlet hole 154.

[0050] Exemplarily, in the embodiment of the utility model, as shown in the figure, Figure 8 and Figure 9As shown, the gas inlet pipe 21, the air inlet pipe 22, the gas outlet pipe 23 and the air outlet pipe 24 are arranged on the electric pile 2 and matched with the electric pile group gas inlet hole 151, the electric pile group air inlet hole 152, the electric pile group gas outlet hole 153 and the electric pile group air outlet hole 154 through the gas inlet pipe 21, the air inlet pipe 22, the gas outlet pipe 23 and the air outlet pipe 24, so as to form the connecting passage of the electric pile 2 and the box body 1. The electric pile 2 can be arranged in plurality, and the gas inlet pipe 21, the air inlet pipe 22, the gas outlet pipe 23 and the air outlet pipe 24 of the plurality of electric piles 2 are matched with the plurality of electric pile hole groups 15 respectively. The number of the electric pile 2 can be arranged according to the number of the electric pile hole group 15. The box body 1 can be produced in batch in the same specification in the production process, so as to reduce the production cost. However, in the actual use process, if the number of the electric pile 2 is less than the number of the electric pile hole group 15, the electric pile hole group 15 can be plugged by separately arranging the plug to prevent the leakage of the reaction gas.

[0051] Optionally, the sealing element is arranged at the connection between the gas inlet pipe 21, the air inlet pipe 22, the gas outlet pipe 23 and the air outlet pipe 24 and the electric pile hole group 15.

[0052] Illustratively, in the embodiment of the utility model, the sealing element is arranged to prevent the leakage of the gas at the connection between the gas inlet pipe 21, the air inlet pipe 22, the gas outlet pipe 23 and the air outlet pipe 24 and the electric pile hole group 15, so as to ensure the safety of the module.

[0053] Optionally, the gas inlet pipe 21, the air inlet pipe 22, the gas outlet pipe 23 and the air outlet pipe 24 are detachably connected with the electric pile 2.

[0054] Illustratively, in the embodiment of the utility model, the gas inlet pipe 21, the air inlet pipe 22, the gas outlet pipe 23 and the air outlet pipe 24 are detachably connected with the electric pile 2. When the connecting pipes are blocked or damaged, they can be conveniently replaced, so that the electric pile 2 can continue to be used, thereby prolonging the service life of the module.

[0055] Unless otherwise defined, technical terms or scientific terms used herein shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terms "first", "second", and similar terms do not denote any order, quantity, or importance, but are used to distinguish one element from another, and the terms "a" or "an" do not denote a limitation of quantity but denote the presence of at least one. The terms "comprising", "including", and similar terms do not denote the presence of the elements or objects followed by the terms, but encompass the elements or objects followed by the terms, as well as equivalents thereof, and do not exclude other elements or objects. The terms "connected" or "coupled" do not denote a direct or mechanical connection or coupling, but can include an electrical connection or coupling, whether direct or indirect. The terms "upper", "lower", "left", "right", and the like are used only to indicate relative positions, and can change when the absolute positions of the described objects change.

[0056] The above description is only some optional embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An air inlet / outlet device for an SOFC system, characterized in that, include: Box (1), The top of the housing (1) is provided with a fuel cell stack gas inlet pipe (11) and a fuel cell stack air inlet pipe (12) on one side, and a fuel cell stack gas outlet pipe (13) and a fuel cell stack air outlet pipe (14) on the other side. The housing (1) is provided with a first cavity (101), a second cavity (102), a third cavity (103), and a fourth cavity (104) that are isolated from each other. The bottom of the housing (1) is provided with a fuel cell stack hole group (15), which includes a fuel cell stack gas inlet hole (151), a fuel cell stack air inlet hole (152), and a fuel cell stack gas outlet hole (153). The fuel cell stack has an air outlet port (154), a fuel cell stack gas inlet port (151) and a fuel cell stack gas inlet pipe (11) connected through the first cavity (101), a fuel cell stack air inlet port (152) and a fuel cell stack air inlet pipe (12) connected through the second cavity (102), a fuel cell stack gas outlet port (153) and a fuel cell stack gas outlet pipe (13) connected through the third cavity (103), and a fuel cell stack air outlet port (154) and a fuel cell stack air outlet pipe (14) connected through the fourth cavity (104).

2. The SOFC system inlet / outlet device according to claim 1, characterized in that, The electrode stack hole group (15) is provided in multiple sets, and the multiple sets of electrode stack hole groups (15) are arranged in a rectangular array at the bottom of the box body (1).

3. The SOFC system inlet / outlet device according to claim 1, characterized in that, An insulating layer (16) is provided between the first cavity (101), the second cavity (102), the third cavity (103), and the fourth cavity (104).

4. The SOFC system inlet / outlet device according to claim 3, characterized in that, The insulating layer (16) is made of stainless steel.

5. The SOFC system inlet / outlet device according to claim 1, characterized in that, A stepped groove (17) is provided on one side of the top of the box body (1), and the fuel cell stack gas inlet pipe (11) and the fuel cell stack air inlet pipe (12) are arranged on the stepped groove (17).

6. The SOFC system inlet / outlet device according to claim 5, characterized in that, The stepped groove (17) is provided with a plurality of fuel cell stack gas inlet pipes (11) and a plurality of fuel cell stack air inlet pipes (12).

7. The SOFC system inlet / outlet device according to claim 6, characterized in that, It also includes a first plug (18) and a second plug (19), the first plug (18) being matched with the fuel cell stack gas inlet pipe (11), and the second plug (19) being matched with the fuel cell stack air inlet pipe (12).

8. An SOFC system inlet / outlet module, comprising an SOFC system inlet / outlet device as described in any one of claims 1 to 7, and further comprising a fuel cell stack (2), wherein the fuel cell stack (2) is provided with a gas inlet pipe (21), an air inlet pipe (22), a gas outlet pipe (23), and an air outlet pipe (24), wherein the gas inlet pipe (21) is matched with the gas inlet port (151) of the fuel cell stack, the air inlet pipe (22) is matched with the air inlet port (152) of the fuel cell stack, the gas outlet pipe (23) is matched with the gas outlet port (153) of the fuel cell stack, and the air outlet pipe (24) is matched with the air outlet port (154) of the fuel cell stack.

9. An SOFC system inlet / outlet module according to claim 8, characterized in that, A sealing element is provided at the connection between the gas inlet pipe (21), the air inlet pipe (22), the gas outlet pipe (23), and the air outlet pipe (24) and the fuel cell stack hole group (15).

10. An SOFC system inlet / outlet module according to claim 8, characterized in that, The gas inlet pipe (21), the air inlet pipe (22), the gas outlet pipe (23), and the air outlet pipe (24) are detachably connected to the fuel cell stack (2).

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