CN218827288U

CN218827288U - Solid oxide fuel cell system

Info

Publication number: CN218827288U
Application number: CN202221727245.0U
Authority: CN
Inventors: 张继红
Original assignee: Guangdong Foran Technology Co ltd
Current assignee: Guangdong Foran Technology Co ltd
Priority date: 2022-07-06
Filing date: 2022-07-06
Publication date: 2023-04-07
Anticipated expiration: 2032-07-06

Abstract

The utility model discloses a solid oxide fuel cell system, which comprises a shell and a plurality of galvanic pile towers, wherein the galvanic pile towers are all positioned inside the shell, and hot area auxiliary part modules are arranged between the galvanic pile towers; the pile tower comprises a plurality of piles, the plurality of piles are connected through a gas distribution plate, a first compression plate is arranged on the upper end face of the top pile, a second compression plate is arranged on the lower end face of the bottom pile, the first compression plate is connected with the second compression plate through a screw rod, and a first compression nut and a second compression nut are connected to the screw rod; the electric piles are connected in series through the cooperation of the first compression plate, the screw, the first compression nut, the second compression plate and the second compression nut to form an electric pile tower, then the electric pile towers are installed in parallel inside the shell, and a hot area auxiliary module is arranged between the two rows of electric pile towers, so that the high integration level of the electric piles is realized, and the occupied area is small; when more power is needed, corresponding galvanic pile towers and hot zone auxiliary modules are added.

Description

Solid oxide fuel cell system

Technical Field

The utility model relates to a solid oxide fuel cell technical field, concretely relates to solid oxide fuel cell system.

Background

The new Solid Oxide Fuel Cells (SOFC) have a number of advantages, such as: the problems of corrosion, electrolyte loss and the like caused by using liquid electrolyte are avoided; the electrode reaction process is quite rapid; noble metal electrodes are not needed, so that the cost is reduced; the comprehensive utilization efficiency of energy can be improved to more than 80% from the pure 60% electric efficiency: the fuel has wide range and can be not only H ₂ CO and the like are used as fuels, and natural gas, coal gasification gas and other hydrocarbons such as methanol and the like can be directly used as fuels; can bear the poison of sulfide and CO with higher concentration, thereby greatly reducing the requirement on the electrode.

However, the number of high-power SOFC (solid oxide fuel cell) electric stacks is small at present, all the electric stacks of the existing SOFC battery system are mainly arranged together in parallel, and the SOFC battery system has low integration level and large floor area.

SUMMERY OF THE UTILITY MODEL

The utility model aims at designing a solid oxide fuel cell system, making it realize that the pile establishes ties earlier and forms the pile tower and connect in parallel the range again, can make pile module integrated level high, area is little.

In order to achieve the above purpose, the utility model provides a following technical scheme: a solid oxide fuel cell system comprises a shell and a plurality of electric pile towers, wherein the electric pile towers are all positioned in the shell, an air pipe communicated with the outside is arranged on the shell, the electric pile towers are averagely divided into two rows and symmetrically distributed in the shell by taking the center of the shell as a boundary, and a hot area auxiliary component module is arranged between the two rows of electric pile towers; the galvanic pile tower comprises a plurality of galvanic piles, the galvanic piles are connected through a gas distribution plate, a first compression plate is arranged on the topmost upper end face of the galvanic pile, a second compression plate is arranged on the bottommost lower end face of the galvanic pile, the first compression plate is connected with the second compression plate through a screw, a first compression nut and a second compression nut are connected to the screw, the first compression nut is located above the first compression plate, and the second compression nut is located below the second compression plate.

Further, the gas distribution plate is provided with a fuel inlet through hole and a fuel outlet through hole in the vertical direction; the fuel inlet through hole and the fuel outlet through hole are matched with the electric pile; the gas distribution plate is provided with a first through hole communicated with the fuel inlet through hole and a second through hole communicated with the fuel outlet through hole in the horizontal direction, and the first through hole and the second through hole are respectively communicated with a fuel pipe.

Further, the inner side of the shell is provided with a heat insulation layer.

Further, the first through hole and the second through hole are communicated with the fuel pipe through insulating pipes.

Furthermore, the galvanic pile is connected with the gas distribution plate through a metal gasket, and the metal gasket is provided with gas holes corresponding to gas circulation channels in the galvanic pile.

Furthermore, the joints of the first pressure plate, the second pressure plate and the screw rod are provided with insulating ferrules.

Furthermore, the contact surface between the first compression plate and the first compression nut and the contact surface between the second compression plate and the second compression nut are both provided with insulating gaskets.

Compared with the prior art, the beneficial effects of the utility model are that: the galvanic pile is stacked in the vertical direction through the cooperation of the first compression plate, the screw, the first compression nut, the second compression plate and the second compression nut to form a galvanic pile tower, then the galvanic pile towers are installed in the shell in parallel, and a hot area auxiliary module is arranged between the two rows of galvanic pile towers, so that the galvanic pile integration level is high, and the occupied area is small; when more power is needed, corresponding electric pile towers and hot zone auxiliary modules are added.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of the interior of the housing of the present invention;

FIG. 2 is a schematic diagram of the structure of the electric pile tower of the present invention;

fig. 3 is a schematic view of the housing of the present invention;

FIG. 4 is a schematic view of a gas distribution plate according to the present invention;

FIG. 5 is a schematic view of the metal gasket structure of the present invention;

the names of the components marked in the figures are as follows:

1. a galvanic pile; 2. a galvanic pile tower; 3. a housing; 4. air holes; 5. a first compression plate; 6. a second compression plate; 7. a screw; 8. a first compression nut; 9. a gas distribution plate; 10. an insulating ferrule; 11. an insulating spacer; 12. an insulating tube; 13. a fuel inlet through hole; 14. a fuel outlet through hole; 15. a metal gasket; 16. a second compression nut; 17. a fuel tube.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, only some embodiments, not all embodiments, of the present invention are described. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Example (b): referring to fig. 1-5, a solid oxide fuel cell system includes a housing 3 and a plurality of stack towers 2, wherein an insulating layer is disposed inside the housing 3; the multiple galvanic pile towers 2 are all positioned in the shell 3, the shell 3 is provided with an air pipe communicated with the outside, the multiple galvanic pile towers 2 are averagely divided into two rows which are symmetrically distributed in the shell 3 by taking the center of the shell 3 as a boundary, and a hot area auxiliary module is arranged between the two rows of galvanic pile towers 2; the electric pile tower 2 comprises a plurality of electric piles 1, the electric piles 1 are connected through a gas distribution plate 9, the number of the electric pile towers 2 in two rows can be freely set along the horizontal direction, and the number of the electric piles 1 on each electric pile tower 2 is consistent; the number of the electric piles 1 and the number of the gas distribution plates 9 can be freely set in the vertical direction in a matching way, so that different power requirements can be flexibly met; through the arrangement mode of the two rows of the electric pile towers 2, a regular cuboid area is reserved for the auxiliary module of the heat area, the existing components are easier to integrate, and the design difficulty of the solid oxide fuel cell system is reduced; meanwhile, the occupied area can be effectively reduced by stacking the electric piles 1 in the vertical direction under the condition that the solid oxide fuel cell system has the same power. The upper end face of the top electric pile 1 is provided with a first pressure plate 5, the lower end face of the bottom electric pile 1 is provided with a second pressure plate 6, the first pressure plate 5 and the second pressure plate 6 are connected through a screw 7, and the joints of the first pressure plate 5, the second pressure plate 6 and the screw 7 are provided with insulating ferrules 10; a first compression nut 8 and a second compression nut 16 are connected to the screw 7, the first compression nut 8 is positioned above the first compression plate 5, and the second compression nut 16 is positioned below the second compression plate 6; and insulating gaskets 11 are arranged on the contact surface between the first compression plate 5 and the first compression nut 8 and the contact surface between the second compression plate 6 and the second compression nut 16. The first compression plate 5 and the second compression plate 6 are connected through a screw 7, a first compression nut 8 and a second compression nut 16, so that the effect of compressing the galvanic pile tower 2 is achieved, and the galvanic pile 1 in the galvanic pile tower 2 is prevented from expanding and leaking at high temperature; the insulating washer 11 and the insulating collar 10 prevent a short circuit between the first and

second compression plates

5, 6 of the stack tower 2.

The gas distribution plate 9 is provided with a fuel inlet through hole 13 and a fuel outlet through hole 14 in the vertical direction; the fuel inlet through hole 13 and the fuel outlet through hole 14 are matched with the galvanic pile 1; the gas distribution plate 9 is provided with a first through hole communicated with the fuel inlet through hole 13 and a second through hole communicated with the fuel outlet through hole 14 in the horizontal direction, and the first through hole and the second through hole are respectively communicated with an insulating pipe 12; the insulating tube 12 communicates with a fuel tube 17. Since the bottom of the stack 1 is not insulated, the insulating pipe 12 is added between the fuel pipe 17 and the gas distribution plate 9 for insulation, thereby improving the insulation of the whole solid oxide fuel cell system. The fuel gas enters the gas distribution plate 9 from the fuel pipe 17 and the insulating pipe 12 which are communicated with the first through hole in sequence, passes through the fuel inlet through hole 13 and enters the electric pile 1, flows out of the electric pile 1 from the outlet of the gas circulation channel of the electric pile 1 after reaction, enters the gas distribution plate 9 along the fuel outlet through hole 14, and then flows out of the insulating pipe 12 and the fuel pipe 17 which are communicated with the second through hole in sequence.

The galvanic pile 1 is connected with the gas distribution plate 9 through a metal gasket 15, and the metal gasket 15 is provided with a gas hole 4 corresponding to a gas circulation channel in the galvanic pile 1. The metal gasket 15 plays a role of electric conduction; and the sealing function can be realized, and gas leakage is prevented.

The working principle of the embodiment is as follows: external fuel gas sequentially enters a gas distribution plate 9 from a fuel pipe 17 and an insulating pipe 12 which are communicated with a first through hole, passes through a fuel inlet through hole 13 and enters the inside of the electric pile 1, flows out of the electric pile 1 from a gas circulation channel outlet of the electric pile 1 after reaction, enters the gas distribution plate 9 along a fuel outlet through hole 14, and then sequentially flows out from the insulating pipe 12 and the fuel pipe 17 which are communicated with a second through hole, the electric pile 1 adopts a cathode open type electric pile 1, namely a shell is sleeved outside each electric pile tower 2, a plurality of air holes are arranged on the shell, so that air enters from one side, close to an air pipe, of the two electric pile towers 2 from the outside through the air pipes along the air holes on the shell, flows out from the opposite side, and flows out in the same direction with the airflow direction of the fuel inlet and outlet pipes, and supplies power to the outside; each cell stack 1 on the stack tower 2 operates such that the hot zone auxiliary modules perform the function of high temperature thermal equilibrium inside the housing 3 in the solid oxide fuel cell system. The cathode open type galvanic pile 1 can reduce the outlet back pressure of the cathode side and reduce the requirement on the performance of a high-temperature sealing material, because the sealing material has certain fluidity at high temperature and has poor back pressure bearing capacity; the cathode air enters from the outer sides of the two rows of the electric pile towers, the inner sides (the sides close to the hot zone auxiliary module) flow out, and due to the fact that the temperature of one side of the hot zone auxiliary module is high, if the cathode air enters from the inner sides, extra thermal stress is caused to the electric pile 1, and the electric pile 1 is damaged.

When the solid oxide fuel cell system needs larger power, the shell 3 which can accommodate the corresponding number of the electric pile towers 2 and the hot area auxiliary module can be replaced, namely, the power needs to be increased, only the corresponding number of the electric pile towers 2 need to be increased, the electric pile towers are arranged in parallel along the original installation direction of the electric pile towers 2, and the number of the two rows of the electric pile towers 2 is kept consistent; therefore, on the premise of ensuring the consistency of gas distribution, the structure of the gas inlet and outlet pipeline can be simplified, a regular space can be reserved for the hot zone auxiliary module, and the arrangement of the hot zone auxiliary module is convenient.

It should be noted that the hot zone auxiliary module includes a pre-reformer, a heat exchanger, an air electric heater and a catalytic oxidizer, the pre-reformer, the heat exchanger, the air electric heater and the catalytic oxidizer are communicated through a first gas pipeline, and then are matched between a second gas pipeline and the stack tower, the hot zone auxiliary module can realize the high-temperature heat balance of the solid oxide fuel cell system by matching with the stack tower, and the hot zone auxiliary module is not the structure claimed in the present invention, so that only the position (i.e. the position between two rows of stack towers 2) is left, and the specific structure of the hot zone auxiliary module is not shown in the figure.

When an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "upper", "lower", "left", "right", "front", "rear", and the like as used herein are for illustrative purposes only.

Claims

1. The utility model provides a solid oxide fuel cell system, includes casing and a plurality of galvanic pile tower, and is a plurality of galvanic pile tower all is located the inside of casing, be equipped with the trachea with outside intercommunication on the casing, its characterized in that: the electric pile towers are averagely divided into two rows which are symmetrically distributed in the shell by taking the center of the shell as a boundary, and a hot area auxiliary component module is arranged between the two rows of electric pile towers; the galvanic pile tower comprises a plurality of galvanic piles, the galvanic piles are connected through a gas distribution plate, a first compression plate is arranged on the topmost upper end face of the galvanic pile, a second compression plate is arranged on the bottommost lower end face of the galvanic pile, the first compression plate is connected with the second compression plate through a screw, a first compression nut and a second compression nut are connected to the screw, the first compression nut is located above the first compression plate, and the second compression nut is located below the second compression plate.

2. The solid oxide fuel cell system of claim 1, wherein: the gas distribution plate is provided with a fuel inlet through hole and a fuel outlet through hole in the vertical direction; the fuel inlet through hole and the fuel outlet through hole are matched with the electric pile; the gas distribution plate is provided with a first through hole communicated with the fuel inlet through hole and a second through hole communicated with the fuel outlet through hole in the horizontal direction, and the first through hole and the second through hole are respectively communicated with a fuel pipe.

3. The solid oxide fuel cell system of claim 2, wherein: the first through hole and the second through hole are communicated with the fuel pipe through insulating pipes.

4. The solid oxide fuel cell system of claim 1, wherein: and the inner side of the shell is provided with a heat insulation layer.

5. The solid oxide fuel cell system of claim 1, wherein: the galvanic pile is connected with the gas distribution plate through a metal gasket, and the metal gasket is provided with gas holes corresponding to gas circulation channels in the galvanic pile.

6. The solid oxide fuel cell system of claim 1, wherein: and insulation ferrules are arranged at the joints of the first compression plate and the screw rod and the joints of the second compression plate and the screw rod.

7. The solid oxide fuel cell system of claim 1, wherein: and insulating gaskets are arranged on the contact surface between the first compression plate and the first compression nut and the contact surface between the second compression plate and the second compression nut.