Fuel processing device and fuel cell system

Abstract

The present disclosure relates to a fuel treatment device and a fuel cell system, the fuel treatment device is applied to a fuel cell stack, the fuel treatment device comprises: an inner channel having a first feed gas inlet and a first feed gas outlet for communicating with an anode chamber inlet of the fuel cell stack, the inner channel being provided with a catalyst for decomposing the first feed gas; the middle channel surrounds the inner channel and is provided with a combustion gas inlet and a combustion gas outlet, the combustion gas inlet is used for being communicated with an anode chamber outlet of the fuel cell stack and an air source, and the combustion gas outlet is used for being communicated with a tail exhaust pipeline; the igniter is arranged at the combustion gas inlet; and the outer channel surrounds the middle channel and is provided with a second raw material gas inlet and a second raw material gas outlet which are communicated with the outer channel, and the second raw material gas outlet is used for being communicated with an anode chamber inlet of the fuel battery pack. The fuel processing device and the fuel cell system provided by the invention can be suitable for a fuel cell stack, and are good in flexibility.

Description

Technical Field

[0001] The present disclosure relates to the technical field of fuel cells, and in particular, to a fuel processing device and a fuel cell system. Background Art

[0002] A fuel cell is a chemical device that converts the chemical energy of a fuel directly into electrical energy, also known as an electrochemical generator. Since a fuel cell converts the Gibbs free energy portion of the chemical energy of a fuel into electrical energy through an electrochemical reaction, it is not limited by the Carnot cycle effect and therefore has high efficiency.

[0003] A solid oxide ammonia fuel cell proposed in the related art is based on a tubular single cell, with an ammonia catalyst placed in the anode tube. The anode exhaust gas after the reaction is supplementally burned together with air, and the heat released by the supplementary combustion is used for the heat absorbed by ammonia decomposition. Although this method uses the heat generated by the supplementary combustion to supplement the heat required for ammonia decomposition, this method is only applicable to tubular single cells, and because all the raw gas therein needs to be decomposed by the ammonia catalyst, it is impossible to adjust the proportion of raw gas required for the fuel cell, and has poor flexibility. Summary of the invention

[0004] An object of the present disclosure is to provide a fuel processing device and a fuel cell system, which can be applied to a fuel cell stack and have good flexibility.

[0005] In order to achieve the above-mentioned objectives, the present disclosure provides a fuel processing device, which is applied to a fuel cell group, and the fuel processing device includes: an inner channel, having a first raw gas inlet and a first raw gas outlet connected to the anode chamber inlet of the fuel cell group, and a catalyst for decomposing the first raw gas is arranged in the inner channel; a middle channel, which surrounds the outside of the inner channel and has a combustion gas inlet and a combustion gas outlet, and the combustion gas inlet is used to be connected to the anode chamber outlet and the air source of the fuel cell group respectively, and the combustion gas outlet is used to be connected to the tail exhaust pipeline; an igniter, which is arranged at the combustion gas inlet; and an outer channel, which surrounds the outside of the middle channel and has a second raw gas inlet and a second raw gas outlet connected to the outer channel, and the second raw gas outlet is used to be connected to the anode chamber inlet of the fuel cell group.

[0006] Optionally, the fuel processing device has a first end and a second end that are relatively arranged, and one of the first raw gas inlet and the first raw gas outlet is arranged at the first end, and the other is arranged at the second end; and / or, one of the combustion gas inlet and the combustion gas outlet is arranged at the first end, and the other is arranged at the second end; and / or, one of the second raw gas inlet and the second raw gas outlet is arranged at the first end, and the other is arranged at the second end.

[0007] Optionally, the vertical projections of the first raw gas inlet and the first raw gas outlet on the axial direction of the fuel processing device are staggered; and / or, the vertical projections of the combustion gas inlet and the combustion gas outlet on the axial direction of the fuel processing device are staggered; and / or, the vertical projections of the second raw gas inlet and the second raw gas outlet on the axial direction of the fuel processing device are staggered.

[0008] Optionally, a mesh plate is provided in the middle channel, and the catalyst is placed on the mesh plate.

[0009] On the basis of the above technical solution, the present disclosure also provides a fuel cell system, which includes a heat box, a fuel cell group, an air source, a tail exhaust pipeline and the above-mentioned fuel processing device, the fuel cell group and at least part of the fuel processing device are arranged inside the heat box, the air source and the tail exhaust pipeline are arranged outside the heat box, the first raw gas outlet and the second raw gas outlet of the fuel processing device are connected to the anode chamber inlet of the fuel cell group, the combustion gas inlet of the fuel processing device is respectively connected to the anode chamber outlet of the fuel cell group and the air source, and the combustion gas outlet of the fuel processing device is connected to the tail exhaust pipeline.

[0010] Optionally, the middle channel and the outer channel of the fuel processing device are flush at the ends of the fuel processing device in the axial direction, and the middle channel and the outer channel are both located inside the heat box.

[0011] Optionally, the inner channel of the fuel processing device includes an inner channel body and a first outer end protruding from the inner channel body in the axial direction of the fuel processing device, the first outer end is located outside the heat box and is detachably connected to the inner channel body, the mesh plate is arranged inside the first outer end, and the first raw gas inlet of the fuel processing device is opened at the first outer end and is located upstream of the mesh plate.

[0012] Optionally, the fuel cell system also includes a first flange structure, which includes a first flange and a second flange that cooperate with each other and are respectively fixed to the first outer end and the inner channel body in the axial direction of the fuel processing device, and the first outer end is connected to the second flange of the inner channel body through the first flange.

[0013] Optionally, the inner channel also includes a second outer end, which is formed by protruding from the inner channel body in the axial direction of the fuel processing device, and the second outer end is located outside the heat box and is detachably connected to the inner channel body, and the first raw gas outlet is opened at the second outer end.

[0014] Optionally, the fuel cell system also includes a second flange structure, which includes a third flange and a fourth flange that cooperate with each other and are respectively fixed to the second outer end and the inner channel body in the axial direction of the fuel processing device, and the second outer end is connected to the fourth flange of the inner channel body through the third flange.

[0015] Optionally, the igniter of the fuel processing device is located outside the hot box.

[0016] Optionally, the fuel cell group includes a plurality of fuel cell groups, and the plurality of fuel cell groups are arranged around the fuel processing device.

[0017] Optionally, each of the fuel cell groups includes one fuel cell stack; or, each of the fuel cell groups includes a plurality of fuel cell stacks, and the plurality of fuel cell stacks are stacked on top of each other.

[0018] Through the above technical scheme, in the fuel processing device provided by the present disclosure, by sequentially setting the inner channel, the middle channel and the outer channel from the inside to the outside, placing the catalyst for decomposing the first raw gas in the inner channel, the first raw gas that needs to be treated by the catalyst and the second raw gas that does not need to be treated can be respectively introduced into the anode chamber of the fuel cell group through their own independent channels. In this way, the addition of raw gas in the fuel cell group is no longer limited to the first raw gas introduced into the inner channel, and the second raw gas with different types and different flow rates can be introduced from the outer channel according to actual conditions. Thus, when the fuel cell group is working, it is not only possible to adjust the composition ratio of the second raw gas obtained by catalyst decomposition in the inner channel according to actual needs, but also to flexibly adjust the type of raw gas according to different stages of the working process. For example, taking ammonia fuel as an example, ammonia decomposes to generate hydrogen and nitrogen, and the ratio is usually 3:1. If the proportion of hydrogen is to be increased, additional hydrogen needs to be added. However, if hydrogen and ammonia are directly mixed for ammonia decomposition, the addition of hydrogen may affect the chemical equilibrium of ammonia decomposition, resulting in a decrease in ammonia conversion rate. Therefore, adding hydrogen from the outer channel will not directly affect ammonia decomposition. In addition, sometimes the fuel cell system uses different raw gas types when heating and reacting, and the setting of the external channel improves the adjustability of the entire fuel cell system. Therefore, the fuel processing device is not only applicable to the fuel cell group, but also has good flexibility during operation.

[0019] In addition, since a middle channel is provided between the inner channel and the outer channel, and the combustion gas inlet of the middle channel is used to communicate with the anode chamber outlet and the air source of the fuel cell group respectively, and the combustion gas outlet is used to communicate with the tail exhaust pipeline, the anode tail gas discharged from the anode chamber of the fuel cell group can be burned in the middle channel. Among them, since the middle channel is arranged between the inner channel and the outer channel, the heat released during the tail gas combustion treatment in the middle channel can heat the raw gas passing through the inner channel and the outer channel arranged adjacent to the middle channel, so that the heat released in the middle channel is fully utilized, and the in-situ heat exchange of the gas in the middle channel and the inner channel and the outer channel is realized. In this way, the heat released in the middle channel not only meets the heat required for the decomposition of the first raw gas in the inner channel, but also meets the preheating of the second raw gas in the outer channel. Exemplarily, the first raw gas to be treated, such as ammonia, first enters the inner channel, is decomposed into nitrogen and hydrogen by an ammonia decomposition catalyst, absorbs heat in this process, and then enters the fuel cell group for reaction. The second raw gas that does not need to be processed, such as hydrogen, synthesis gas or protective gas, enters the outer channel, is preheated, and enters the fuel cell group together with the gas processed in the inner channel for reaction. The anode tail gas after the reaction that needs to be processed usually includes unreacted ammonia, hydrogen and nitrogen. These gases are mixed with a certain amount of air and enter the middle channel for mixing. They are ignited and burned by the igniter. Ammonia and hydrogen can be processed into dischargeable gases and then discharged to the outside. Heat is released in the process. It can be seen that the fuel processing device can realize in-situ heat exchange between the gas in the middle channel and the inner channel and the outer channel.

[0020] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0022] Figure 1 is a schematic structural diagram of a fuel processing device disclosed in the present invention;

[0023] Figure 2 is another structural schematic diagram of the fuel processing device disclosed in the present invention;

[0024] Figure 3 is a perspective structural schematic diagram of a fuel cell system of the present disclosure.

[0025] Description of Reference Numerals

[0026] 1-fuel processing device; 11-inner channel; 111-inner channel body; 112-first outer end; 1121-first raw gas inlet; 113-second outer end; 1131-first raw gas outlet; 114-mesh plate; 12-middle channel; 121-combustion gas inlet; 122-combustion gas outlet; 13-outer channel; 131-second raw gas inlet; 132-second raw gas outlet; 14-first end; 15-second end; 2-fuel cell group; 3-hot box; 4-first flange structure; 41-first flange; 42-second flange; 5-second flange structure; 51-third flange; 52-fourth flange. DETAILED DESCRIPTION

[0027] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0028] In the present disclosure, unless otherwise stated, directional words such as "inside" and "outside" refer to the "inside" and "outside" relative to the contour of the corresponding component itself. In addition, the axial direction of the fuel processing device refers to Figure 1 and Figure 2 In the vertical direction of the invention, the terms "first", "second", "third", "fourth", etc., used in the present invention are intended to distinguish one element from another and do not have order or importance. In addition, in the following description, when referring to the drawings, unless otherwise explained, the same reference numerals in different drawings represent the same or similar elements. The above definitions are only used to explain and illustrate the present invention and should not be construed as limitations on the present invention.

[0029] The present disclosure provides a fuel processing device 1, which is applied to a fuel cell stack 2. Figures 1 to 3 As shown in the figure, the fuel processing device 1 includes: an inner channel 11, having a first raw gas inlet 1121 and a first raw gas outlet 1131 for connecting to the anode chamber inlet of the fuel cell group 2, and a catalyst for decomposing the first raw gas is arranged in the inner channel 11; a middle channel 12, surrounding the inner channel 11 and having a combustion gas inlet 121 and a combustion gas outlet 122, the combustion gas inlet 121 is used to connect to the anode chamber outlet of the fuel cell group 2 and the air source (not shown in the figure), respectively, and the combustion gas outlet 122 is used to connect to the tail exhaust pipeline (not shown in the figure); an igniter (not shown in the figure), arranged at the combustion gas inlet 121; and an outer channel 13, surrounding the middle channel 12 and having a second raw gas inlet 131 and a second raw gas outlet 132 connected to the outer channel 13, and the second raw gas outlet 132 is used to connect to the anode chamber inlet of the fuel cell group 2.

[0030] Through the above technical scheme, in the fuel processing device 1 provided by the present invention, by arranging the inner channel 11, the middle channel 12 and the outer channel 13 in sequence from the inside to the outside, and placing a catalyst for decomposing the first raw gas in the inner channel 11, the first raw gas that needs to be treated by the catalyst and the second raw gas that does not need to be treated can be respectively introduced into the anode chamber of the fuel cell group 2 through their own independent channels. In this way, the addition of raw gas in the fuel cell group 2 is no longer limited to the first raw gas introduced into the inner channel 11, and the second raw gas with different types and different flow rates can be selected to be introduced from the outer channel 13 according to actual conditions. As a result, when the fuel cell group 2 is working, it is not only possible to adjust the component ratio of the second raw gas obtained by catalyst decomposition in the inner channel 11 according to actual needs, but also to flexibly adjust the type of raw gas according to different stages of the working process. For example, taking ammonia fuel as an example, ammonia decomposes to generate hydrogen and nitrogen, and the ratio is usually 3:1. If you want to increase the ratio of hydrogen, you need to add additional hydrogen. However, if hydrogen and ammonia are directly mixed for ammonia decomposition, the addition of hydrogen may affect the chemical equilibrium of ammonia decomposition, resulting in a decrease in ammonia conversion rate. Therefore, adding hydrogen from the external channel 13 will not have a direct impact on ammonia decomposition. In addition, sometimes the fuel cell system uses different types of raw gas when heating and reacting, and the setting of the external channel 13 improves the adjustability of the entire fuel cell system. Therefore, the fuel processing device 1 is not only applicable to the fuel cell stack 2, but also has good flexibility during operation.

[0031] In addition, since the middle channel 12 is provided between the inner channel 11 and the outer channel 13, and the combustion gas inlet 121 of the middle channel 12 is used to communicate with the anode chamber outlet and the air source of the fuel cell stack 2 respectively, and the combustion gas outlet 122 is used to communicate with the tail exhaust pipeline, the anode tail gas discharged from the anode chamber of the fuel cell stack 2 can be burned in the middle channel 12. Among them, since the middle channel 12 is provided between the inner channel 11 and the outer channel 13, the heat released during the tail gas combustion process in the middle channel 12 can heat the raw gas passing through the inner channel 11 and the outer channel 13 provided adjacent to the middle channel 12, so that the heat released in the middle channel 12 is fully utilized, and the in-situ heat exchange between the middle channel 12 and the gases in the inner channel 11 and the outer channel 13 is realized. In this way, the heat released in the middle channel 12 not only meets the heat required for the decomposition of the first raw gas in the inner channel 11, but also meets the preheating of the second raw gas in the outer channel 13. Exemplarily, the first raw gas to be treated, such as ammonia, first enters the inner channel 11, is decomposed into nitrogen and hydrogen by an ammonia decomposition catalyst, and heat is absorbed in this process, and then enters the fuel cell stack 2 for reaction. The second raw gas that does not need to be treated, such as hydrogen, synthesis gas or protective gas, enters the outer channel 13, is preheated, and enters the fuel cell stack 2 together with the gas treated in the inner channel 11 for reaction. The anode tail gas after the reaction that needs to be treated usually includes unreacted ammonia, hydrogen and nitrogen. These gases are mixed with a certain amount of air in the middle channel 12, ignited and burned by an igniter, and ammonia and hydrogen can be processed into dischargeable gases, which are then discharged to the outside, releasing heat in this process. It can be seen that the fuel processing device 1 can realize in-situ heat exchange between the gas in the middle channel 12 and the inner channel 11 and the outer channel 13.

[0032] It should be noted that the mixing method of the anode exhaust gas and the air in the above process is not limited to the mixing after entering the middle channel 12 as described in the above process. The two can also be mixed before entering the middle channel 12. The specific method can be flexibly selected according to actual conditions, and the present disclosure does not make specific limitations on this.

[0033] In the embodiments provided in the present disclosure, each gas inlet and outlet in the fuel processing device 1 can be arranged in at least the following ways:

[0034] In a first possible implementation, the fuel processing device 1 has a first end 14 and a second end 15 that are arranged opposite to each other, and one of the first raw gas inlet 1121 and the first raw gas outlet 1131 is arranged at the first end 14 , and the other is arranged at the second end 15 .

[0035] In a second possible implementation, the fuel processing device 1 has a first end 14 and a second end 15 that are oppositely disposed, and one of the combustion gas inlet 121 and the combustion gas outlet 122 is disposed at the first end 14 , and the other is disposed at the second end 15 .

[0036] In a third possible implementation, the fuel processing device 1 has a first end 14 and a second end 15 that are arranged opposite to each other, and one of the second raw gas inlet 131 and the second raw gas outlet 132 is arranged at the first end 14 , and the other is arranged at the second end 15 .

[0037] In a fourth possible embodiment, the fuel processing device 1 has a first end 14 and a second end 15 that are arranged opposite to each other, one of the first raw gas inlet 1121 and the first raw gas outlet 1131 is arranged at the first end 14, and the other is arranged at the second end 15, and one of the combustion gas inlet 121 and the combustion gas outlet 122 is arranged at the first end 14, and the other is arranged at the second end 15.

[0038] In a fifth possible embodiment, the fuel processing device 1 has a first end 14 and a second end 15 that are relatively arranged, one of the first raw gas inlet 1121 and the first raw gas outlet 1131 is arranged at the first end 14, and the other is arranged at the second end 15, and one of the second raw gas inlet 131 and the second raw gas outlet 132 is arranged at the first end 14, and the other is arranged at the second end 15.

[0039] In a sixth possible embodiment, the fuel processing device 1 has a first end 14 and a second end 15 that are relatively arranged, one of the combustion gas inlet 121 and the combustion gas outlet 122 is arranged at the first end 14, and the other is arranged at the second end 15, and one of the second raw gas inlet 131 and the second raw gas outlet 132 is arranged at the first end 14, and the other is arranged at the second end 15.

[0040] In a seventh possible embodiment, the fuel processing device 1 has a first end 14 and a second end 15 that are relatively arranged, one of the first raw gas inlet 1121 and the first raw gas outlet 1131 is arranged at the first end 14, and the other is arranged at the second end 15, one of the combustion gas inlet 121 and the combustion gas outlet 122 is arranged at the first end 14, and the other is arranged at the second end 15, and one of the second raw gas inlet 131 and the second raw gas outlet 132 is arranged at the first end 14, and the other is arranged at the second end 15.

[0041] It should be noted that, in the above seven possible implementations, one of the first raw gas inlet 1121 and the first raw gas outlet 1131 is disposed at the first end 14, and the other is disposed at the second end 15, that is, referring to Figure 1 and Figure 2As shown, when the first raw gas inlet 1121 is arranged at the first end 14, the first raw gas outlet 1131 is arranged at the second end 15, or when the first raw gas inlet 1121 is arranged at the second end 15, the first raw gas outlet 1131 is arranged at the first end 14. One of the combustion gas inlet 121 and the combustion gas outlet 122 is arranged at the first end 14, and the other is arranged at the second end 15, that is, referring to Figure 1 and Figure 2 As shown, when the combustion gas inlet 121 is arranged at the first end 14, the combustion gas outlet 122 is arranged at the second end 15, or when the combustion gas inlet 121 is arranged at the second end 15, the combustion gas outlet 122 is arranged at the first end 14. In addition, one of the second raw gas inlet 131 and the second raw gas outlet 132 is arranged at the first end 14, and the other is arranged at the second end 15, that is, referring to Figure 2 As shown, when the second raw gas inlet 131 is arranged at the first end 14, the second raw gas outlet 132 is arranged at the second end 15, or when the second raw gas inlet 131 is arranged at the second end 15, the second raw gas outlet 132 is arranged at the first end 14. Here, by arranging the corresponding gas inlet and outlet in each channel at the opposite first end 14 and second end 15, the gas can flow fully in the corresponding channel, so that when the gas flows through the corresponding channel, heat exchange can be carried out as fully as possible with the adjacent channel.

[0042] In the embodiments provided in the present disclosure, the positional relationship between the air inlet and outlet openings on each channel can be implemented in at least the following possible ways:

[0043] In a first possible implementation manner, the vertical projections of the first raw gas inlet 1121 and the first raw gas outlet 1131 in the axial direction of the fuel processing device 1 are staggered.

[0044] In a second possible implementation, the vertical projections of the combustion gas inlet 121 and the combustion gas outlet 122 in the axial direction of the fuel processing device 1 are staggered.

[0045] In a third possible implementation, the second raw gas inlet 131 and the second raw gas outlet 132 are staggered in their vertical projections in the axial direction of the fuel processing device 1 .

[0046] In a fourth possible implementation, the vertical projections of the first raw gas inlet 1121 and the first raw gas outlet 1131 in the axial direction of the fuel processing device 1 are staggered, and the vertical projections of the combustion gas inlet 121 and the combustion gas outlet 122 in the axial direction of the fuel processing device 1 are staggered.

[0047] In a fifth possible implementation, the vertical projections of the first raw gas inlet 1121 and the first raw gas outlet 1131 in the axial direction of the fuel processing device 1 are staggered, and the vertical projections of the second raw gas inlet 131 and the second raw gas outlet 132 in the axial direction of the fuel processing device 1 are staggered.

[0048] In a sixth possible implementation, the vertical projections of the combustion gas inlet 121 and the combustion gas outlet 122 in the axial direction of the fuel processing device 1 are staggered, and the vertical projections of the second raw gas inlet 131 and the second raw gas outlet 132 in the axial direction of the fuel processing device 1 are staggered.

[0049] In a seventh possible implementation, the vertical projections of the first raw gas inlet 1121 and the first raw gas outlet 1131 in the axial direction of the fuel processing device 1 are staggered, the vertical projections of the combustion gas inlet 121 and the combustion gas outlet 122 in the axial direction of the fuel processing device 1 are staggered, and the vertical projections of the second raw gas inlet 131 and the second raw gas outlet 132 in the axial direction of the fuel processing device 1 are staggered.

[0050] In the above seven possible implementations, by distributing the first raw gas inlet 1121 and the first raw gas outlet 1131, the combustion gas inlet 121 and the combustion gas outlet 122, and the second raw gas inlet 131 and the second raw gas outlet 132 in pairs in a staggered vertical projection in the axial direction of the fuel processing device 1, it is ensured that the gas can fully flow and mix when passing through the corresponding channels, thereby improving the working efficiency of the entire fuel cell system.

[0051] It should be noted that the number of the above-mentioned first raw gas inlet 1121, the first raw gas outlet 1131, the combustion gas inlet 121, the combustion gas outlet 122, the second raw gas inlet 131 and the second raw gas outlet 132 can be one each, or some can be one and the other can be multiple, or all can be set to multiple. This is not limited to the present disclosure and will be determined based on actual conditions.

[0052] In the embodiments provided in the present disclosure, reference is made to Figure 1 As shown, in order to facilitate the placement of the catalyst, a mesh plate 114 may be provided in the middle channel 12, and a catalyst may be placed on the mesh plate 114. In order to further improve the decomposition efficiency of the first raw gas, the mesh plate 114 may be provided near the first raw gas inlet 1121.

[0053] Based on the above technical solution, the present disclosure also provides a fuel cell system, referring to Figures 1 to 3As shown, the fuel cell system includes a heat box 3, a fuel cell group 2, an air source, a tail exhaust pipeline and the above-mentioned fuel processing device 1, the fuel cell group 2 and at least part of the fuel processing device 1 are arranged inside the heat box 3, the air source and the tail exhaust pipeline are arranged outside the heat box 3, the first raw gas outlet 1131 and the second raw gas outlet 132 of the fuel processing device 1 are connected to the anode chamber inlet of the fuel cell group 2, the combustion gas inlet 121 of the fuel processing device 1 is respectively connected to the anode chamber outlet of the fuel cell group 2 and the air source, and the combustion gas outlet 122 of the fuel processing device 1 is connected to the tail exhaust pipeline. Through such an arrangement, it is possible to achieve pre-treatment and post-treatment of the raw gas and tail gas required by the fuel cell group 2 while generating electricity by using the fuel cell group 2 through the fuel processing device 1. At the same time, the structural design of the fuel processing device 1 also enables the fuel cell system to make full use of the heat released by the fuel processing device 1 during the tail gas treatment process to provide heat for the pre-treatment of the raw gas.

[0054] In the embodiments provided in the present disclosure, reference is made to Figure 1 As shown, the middle channel 12 and the outer channel 13 of the fuel processing device 1 are flush at the ends in the axial direction of the fuel processing device 1, so as to simplify the structure of the fuel processing device 1 and facilitate construction, wherein the middle channel 12 and the outer channel 13 are both located inside the heat box 3, so that the inside of the middle channel 12 and the outside channel 13 can be insulated, so as to meet the reaction temperature requirements in the middle channel 12 while also meeting the preheating requirements of the second raw gas in the outer channel 13.

[0055] In the embodiments provided in the present disclosure, reference is made to Figure 1 and Figure 2 As shown, the inner channel 11 of the fuel processing device 1 includes an inner channel body 111 and a first outer end 112 formed by protruding from the inner channel body 111 in the axial direction of the fuel processing device 1. The first outer end 112 is located outside the heat box 3 and is detachably connected to the inner channel body 111. The mesh plate 114 is arranged inside the first outer end 112. The first raw gas inlet 1121 of the fuel processing device 1 is opened at the first outer end 112 and is located upstream of the mesh plate 114. Through such an arrangement, on the one hand, the sealing performance of the first outer end 112 can be ensured, and on the other hand, it is also convenient for the removal operation of the catalyst during the replacement process. In addition, such an arrangement can also extend the service life of the first outer end 112.

[0056] The detachable connection between the first outer end 112 and the inner channel body 111 can be constructed in any suitable manner. Optionally, the fuel cell system further includes a first flange structure 4, the first flange structure 4 includes a first flange 41 and a second flange 42 that cooperate with each other and are respectively fixed to the first outer end 112 and the inner channel body 111 in the axial direction of the fuel processing device 1, and the first outer end 112 is connected to the second flange 42 of the inner channel body 111 through the first flange 41.

[0057] In the embodiments provided in the present disclosure, reference is made to Figure 1 and Figure 2 As shown, the inner channel 11 also includes a second outer end 113, which is formed by protruding from the inner channel body 111 in the axial direction of the fuel processing device 1, and the second outer end 113 is located outside the heat box 3 and is detachably connected to the inner channel body 111, and the first raw gas outlet 1131 is opened at the second outer end 113. Through such an arrangement, on the one hand, the sealing performance of the second outer end 113 can be ensured, and on the other hand, it is also convenient for the catalyst to be placed during the replacement process. On the other hand, such an arrangement can also extend the service life of the second outer end 113.

[0058] The detachable connection between the second outer end 113 and the inner channel body 111 can be constructed in any suitable manner. Optionally, the fuel cell system further includes a second flange structure 5, the second flange structure 5 includes a third flange 51 and a fourth flange 52 that cooperate with each other and are respectively fixed to the second outer end 113 and the inner channel body 111 in the axial direction of the fuel processing device 1, and the second outer end 113 is connected to the fourth flange 52 of the inner channel body 111 through the third flange 51.

[0059] In the embodiment provided in the present disclosure, in order to extend the service life of the igniter, the igniter of the fuel processing device 1 may be arranged to be located outside the heat box 3 .

[0060] In the embodiment provided in the present disclosure, in order to improve the power generation capacity of the entire fuel cell system and make the fuel cell system as compact as possible to reduce the volume, the fuel cell group 2 can be provided to include multiple fuel cell groups 2, and the multiple fuel cell groups 2 are arranged around the fuel processing device 1. Exemplarily, the arrangement of these fuel cell groups 2 can be a ring arrangement or a square arrangement or any other suitable arrangement.

[0061] According to actual power generation requirements, each fuel cell group 2 may include one fuel cell stack or each fuel cell group 2 may include multiple fuel cell stacks, and the multiple fuel cell stacks may be stacked on top of each other.

[0062] It should be noted that the fuel cell mentioned in the present disclosure may be a solid oxide fuel cell, and when it is a solid oxide fuel cell, in order to be resistant to high temperatures, the material of each layer of channels in the fuel processing device 1 may be selected to be a high temperature resistant material, such as high temperature resistant stainless steel.

[0063] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0064] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0065] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A fuel processing device, applied to a fuel cell stack, characterized in that: The fuel processing device comprises: An inner channel having a first raw gas inlet and a first raw gas outlet for communicating with the anode chamber inlet of the fuel cell stack, wherein a catalyst for decomposing the first raw gas is disposed in the inner channel; a middle channel, surrounding the inner channel and having a combustion gas inlet and a combustion gas outlet, wherein the combustion gas inlet is used to communicate with the anode chamber outlet of the fuel cell stack and the air source respectively, and the combustion gas outlet is used to communicate with the tail exhaust pipeline; an igniter, disposed at the combustion gas inlet; and The outer channel surrounds the middle channel and has a second raw gas inlet and a second raw gas outlet communicating with the outer channel, wherein the second raw gas outlet is used to communicate with the anode chamber inlet of the fuel cell stack.

2. The fuel processing device according to claim 1, characterized in that: The fuel processing device has a first end and a second end disposed opposite to each other. One of the first raw gas inlet and the first raw gas outlet is arranged at the first end, and the other is arranged at the second end; and / or, One of the combustion gas inlet and the combustion gas outlet is arranged at the first end, and the other is arranged at the second end; and / or, One of the second raw gas inlet and the second raw gas outlet is disposed at the first end, and the other is disposed at the second end.

3. The fuel processing device according to claim 2, characterized in that: The vertical projections of the first raw gas inlet and the first raw gas outlet on the axial direction of the fuel processing device are staggered; and / or, The vertical projections of the combustion gas inlet and the combustion gas outlet on the axial direction of the fuel processing device are staggered; and / or, The second raw gas inlet and the second raw gas outlet are staggered in vertical projection on the axial direction of the fuel processing device.

4. The fuel processing device according to claim 1, characterized in that: A mesh plate is arranged in the middle channel, and the catalyst is placed on the mesh plate.

5. A fuel cell system, characterized in that: The fuel cell system includes a heat box, a fuel cell group, an air source, a tail exhaust pipeline and a fuel processing device according to any one of claims 1 to 4, the fuel cell group and at least part of the fuel processing device are arranged inside the heat box, the air source and the tail exhaust pipeline are arranged outside the heat box, the first raw gas outlet and the second raw gas outlet of the fuel processing device are connected to the anode chamber inlet of the fuel cell group, the combustion gas inlet of the fuel processing device is respectively connected to the anode chamber outlet of the fuel cell group and the air source, and the combustion gas outlet of the fuel processing device is connected to the tail exhaust pipeline.

6. The fuel cell system according to claim 5, characterized in that: The middle channel and the outer channel of the fuel processing device are respectively flush at the ends of the fuel processing device in the axial direction, and the middle channel and the outer channel are both located inside the heat box.

7. The fuel cell system according to claim 6, characterized in that: The inner channel of the fuel processing device includes an inner channel body and a first outer end protruding from the inner channel body in the axial direction of the fuel processing device, the first outer end is located outside the heat box and is detachably connected to the inner channel body, the mesh plate is arranged inside the first outer end, and the first raw gas inlet of the fuel processing device is opened at the first outer end and is located upstream of the mesh plate.

8. The fuel cell system according to claim 7, characterized in that: The fuel cell system also includes a first flange structure, which includes a first flange and a second flange that cooperate with each other and are respectively fixed to the first outer end and the inner channel body in the axial direction of the fuel processing device, and the first outer end is connected to the second flange of the inner channel body through the first flange.

9. The fuel cell system according to claim 7, characterized in that: The inner channel also includes a second outer end, which is formed by protruding from the inner channel body in the axial direction of the fuel processing device. The second outer end is located outside the heat box and is detachably connected to the inner channel body. The first raw gas outlet is opened at the second outer end.

10. The fuel cell system according to claim 9, characterized in that: The fuel cell system also includes a second flange structure, which includes a third flange and a fourth flange that cooperate with each other and are respectively fixed to the second outer end and the inner channel body in the axial direction of the fuel processing device, and the second outer end is connected to the fourth flange of the inner channel body through the third flange.

11. The fuel cell system according to any one of claims 5 to 10, characterized in that: The igniter of the fuel processing device is located outside the hot box.

12. The fuel cell system according to claim 11, characterized in that: The fuel cell group includes a plurality of fuel cell groups, and the plurality of fuel cell groups are arranged around the fuel processing device.

13. The fuel cell system according to claim 12, characterized in that: Each of the fuel cell groups includes a fuel cell stack; or, Each of the fuel cell groups includes a plurality of fuel cell stacks, and the plurality of fuel cell stacks are stacked on top of each other.

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