Fuel cell integrated thermal component, system and working method

Abstract

The present invention discloses a fuel cell integrated thermal component, system and working method, which solves the problems of difficult and high cost in the processing of the integrated thermal component structure in the prior art, and has the beneficial effects of effectively controlling costs and facilitating later maintenance. The specific scheme is as follows: A fuel cell integrated thermal component includes a burner, the burner has a first side, a first heat exchanger is arranged to fit the first side of the burner, one side of the first heat exchanger exceeds one side of the burner and is arranged to be connected to the burner outlet, the length of the first heat exchanger is less than the length of the first side, the second heat exchanger and the reformer are respectively arranged on two opposite sides of the first heat exchanger, at least one of the second heat exchanger and the reformer is fitted with the first side, and the second heat exchanger and the reformer are respectively fitted with the sides corresponding to the first heat exchanger; the second heat exchanger is used to exchange heat with the hot anode exhaust gas, and the burner outlet is connected to the hot side inlet of the first heat exchanger.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal components for fuel cells, and in particular to a fuel cell integrated thermal component, system and working method. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] The burner is integrated with one or more heat exchangers to improve system efficiency. Chinese patent application CN202410023175.8, a modular fuel cell integrated thermal component, system and working method, was published on April 12, 2024. In this patent application, the heat exchanger is set on the outside of the burner to form a nested structure. The inventor found that the overall structure of the integrated thermal components arranged in sequence is complex, and the structure arranged in sequence has the problem of great difficulty in later maintenance; and it is also necessary to adjust multiple rectangular heat exchangers into annular structural parts, which has the problems of great design difficulty, great processing difficulty, and high processing and manufacturing cost. Summary of the invention

[0004] In view of the shortcomings of the prior art, an object of the present invention is to provide a fuel cell integrated thermal component, which is convenient for processing and manufacturing and also convenient for the subsequent maintenance of the integrated thermal component.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0006] A fuel cell integrated thermal component comprises a burner, the burner having a first side, a first heat exchanger is arranged in contact with the first side of the burner, one side of the first heat exchanger is arranged beyond one side of the burner to be connected to an outlet of the burner, the length of the first heat exchanger is less than the length of the first side, a second heat exchanger and a reformer are respectively arranged on two opposite sides of the first heat exchanger, at least one of the second heat exchanger and the reformer is in contact with the first side, and the second heat exchanger and the reformer are respectively in contact with the side corresponding to the first heat exchanger;

[0007] The second heat exchanger is used for exchanging heat with the hot anode tail gas. The burner outlet is connected to the hot side inlet of the first heat exchanger, the cold side inlet of the first heat exchanger is connected to the cold side outlet of the second heat exchanger, and the branch pipe of the cold side outlet of the first heat exchanger is connected to the reformer. The reformer is introduced with the mixed fuel gas and the hot air output from the hot side outlet of the first heat exchanger.

[0008] A fuel cell integrated thermal component as described above, wherein the burner, the first heat exchanger, the second heat exchanger and the reformer are all rectangular components;

[0009] The burner is at the same height as the first heat exchanger, the second heat exchanger and the reformer;

[0010] The first heat exchanger, the second heat exchanger and the reformer are arranged flush with each other on the other side away from the first side of the burner.

[0011] A fuel cell integrated thermal component as described above, wherein the cold side inlet and the cold side outlet of the first heat exchanger are placed on one diagonal line of the first heat exchanger, and the hot side inlet and the hot side outlet of the first heat exchanger are placed on another diagonal line;

[0012] The hot side inlet of the first heat exchanger is connected to the burner outlet through an outlet pipeline with an L-shaped cross section.

[0013] A fuel cell integrated thermal component as described above, wherein the first cold side outlet of the first heat exchanger is engaged or docked with the hot side inlet of the reformer, and the second cold side outlet of the first heat exchanger is arranged at the top of the first heat exchanger;

[0014] The cold side outlet of the second heat exchanger is connected or docked with the first cold side inlet of the first heat exchanger, and the second cold side inlet of the first heat exchanger is placed on the top of the first heat exchanger.

[0015] A fuel cell integrated thermal component as described above, wherein the hot side inlet and the hot side outlet of the second heat exchanger are located on one diagonal line of the second heat exchanger, and the cold side inlet and the cold side outlet of the second heat exchanger are located on another diagonal line;

[0016] The hot side inlet and the hot side outlet of the reformer are located on one diagonal line of the reformer, and the cold side inlet and the cold side outlet of the reformer are located on another diagonal line.

[0017] A fuel cell integrated thermal component as described above, wherein the second heat exchanger is disposed beyond the burner, and the reformer is in contact with the first side surface;

[0018] The hot side inlet, the hot side outlet and the cold side inlet of the second heat exchanger are all located at the top of the second heat exchanger;

[0019] The cold side outlet of the first heat exchanger is arranged close to the first side surface.

[0020] A fuel cell integrated thermal component as described above, wherein the cold side inlet of the second heat exchanger protrudes from the side of the second heat exchanger, and the cold side inlet of the second heat exchanger is located at the side of the burner;

[0021] The cold side outlet, hot side inlet and hot side outlet of the reformer are all arranged at the top of the reformer;

[0022] The hot side outlet of the first heat exchanger is arranged at the top of the first heat exchanger.

[0023] A fuel cell integrated thermal component as described above, wherein the reformer is arranged beyond the burner, and the second heat exchanger is in contact with the first side surface;

[0024] The hot side outlet of the reformer protrudes from the side of the reformer, and the hot side outlet of the reformer is located at the side of the burner;

[0025] The cold side outlet of the second heat exchanger is arranged close to the first side surface.

[0026] A fuel cell integrated thermal component as described above, wherein the burner comprises a shell, a combustion tube is arranged inside the shell, a burner outlet is arranged at one end of the combustion tube, and a plurality of burner heads are arranged at the other end, the burner heads are annular parts, and a distance is set between the burner heads and the shell, and the burner heads realize mixing of fuel and air;

[0027] The burner is also provided with a second side, a third side and a fourth side respectively connected to the first side, the air intake pipe is arranged through the third side, the second side is provided with a cathode tail gas inlet, and the burner outlet is arranged on the fourth side.

[0028] In a second aspect, the present invention further provides a fuel cell system, comprising the above-mentioned fuel cell integrated thermal component, wherein the cathode outlet of the fuel cell is connected to the burner, and the anode outlet of the fuel cell is connected to the hot side inlet of the second heat exchanger.

[0029] In a third aspect, the present invention further provides a working method of a fuel cell integrated thermal component, comprising the following contents:

[0030] The cathode tail gas generated at the cathode of the fuel cell enters the burner and undergoes a combustion reaction with the first fuel and / or the second fuel to obtain a burner hot tail gas;

[0031] The first cold air and the hot anode tail gas are heat exchanged in the second heat exchanger, and the hot anode tail gas is converted into cold anode tail gas;

[0032] The first cold air from the second heat exchanger mixes with the second cold air, enters the first heat exchanger, and exchanges heat with the hot exhaust gas of the burner. The hot exhaust gas of the burner becomes the cold exhaust gas of the burner, and the first cold air and the second cold air become the first hot air;

[0033] Part of the first hot air is discharged, and part of the first hot air enters the reformer to provide heat for the reformer. The mixed fuel gas undergoes a reforming reaction in the reformer to become reformed gas, and the first hot air becomes second hot air and is discharged.

[0034] The beneficial effects of the present invention are as follows:

[0035] 1) In the present invention, the burner has a first side surface through the arrangement of the integrated heat component, and the burner can be fitted with the sides of the first heat exchanger, the second heat exchanger and the reformer through the first side surface, so that the structure of the entire integrated heat component is relatively regular and the space is fully utilized, while reducing the footprint of the integrated heat component, ensuring the reasonable arrangement of each component, and facilitating processing and manufacturing, effectively reducing the processing cost, and facilitating later maintenance, as long as the corresponding components are replaced; and the overall integration is improved, while reducing the overall volume, the thermal insulation performance of the entire heat component can be improved.

[0036] 2) In the present invention, each component is specifically a rectangular body, which is convenient for processing and manufacturing, and can also achieve seamless assembly of each component, ensuring the installation space of each component and thus ensuring the area of ​​the heat exchanger and the reformer; the height of each component is the same, and the first heat exchanger, the second heat exchanger and the reformer are flush with the other side away from the first side of the burner, ensuring the rationality of the overall installation and maximizing the space utilization.

[0037] 3) In the present invention, the first heat exchanger, the second heat exchanger and the reformer are arranged side by side. According to the setting positions of the second heat exchanger and the reformer, two schemes can be set. The first heat exchanger is connected to the outlet of the burner, and the positions of the second heat exchanger and the reformer can be selectively adjusted. The positions of the second heat exchanger and the reformer are changed to match the inlet and outlet positions of the gases of different components, so as to achieve direct splicing of adjacent inlets and outlets, reduce intermediate transition links, and improve space utilization.

[0038] 4) In the present invention, the first cold side outlet of the first heat exchanger is snap-connected or butted with the hot side inlet of the reformer, and the cold side outlet of the second heat exchanger is snap-connected or butted with the first cold side inlet of the first heat exchanger, which effectively ensures a seamless connection between the first heat exchanger and the second heat exchanger and the reformer, effectively reduces the setting of pipelines, and improves the flow uniformity of gas in and out of the corresponding heat exchanger and reformer, and reduces the pressure loss of gas flowing between different components.

[0039] 5) In the present invention, the first heat exchanger, the second heat exchanger and the reformer are arranged side by side, so that the main pipelines of each component can be placed on the top of the integrated heat component, which is convenient for storing the pipelines and ensures seamless assembly during splicing.

[0040] 6) The burner structure of the present invention is reasonably arranged, and can realize the arrangement of a rectangular burner. Fuel can be input into the combustion tube through multiple burner heads and react with the cathode exhaust gas introduced, so that the burner can effectively adapt to the heat exchanger and the reformer. Moreover, the heat exchanger structure is reasonably arranged, so that the main pipelines are placed on both sides and the top thereof, which is convenient for the installation of the pipelines after the device is integrated. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0042] Figure 1 It is a schematic diagram of a second burner exceeding burner arrangement scheme in a fuel cell integrated thermal component according to one or more embodiments of the present invention.

[0043] Figure 2 The present invention is a schematic diagram of a scheme for arranging a reformer over a burner in a fuel cell integrated thermal component according to one or more embodiments of the present invention.

[0044] Figure 3 It is a perspective view of a burner arrangement scheme of a second burner in a fuel cell integrated thermal component according to one or more embodiments of the present invention.

[0045] Figure 4 It is a perspective view of a configuration scheme of a reformer exceeding a burner in a fuel cell integrated thermal component according to one or more embodiments of the present invention.

[0046] Figure 5 It is a schematic diagram of the arrangement of a burner in a fuel cell integrated thermal component according to one or more embodiments of the present invention.

[0047] Figure 6 It is a schematic diagram of the interior of a burner in a fuel cell integrated thermal component according to one or more embodiments of the present invention.

[0048] Figure 7 is a schematic diagram of a burner head in a fuel cell integrated thermal component according to one or more embodiments of the present invention.

[0049] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for reference only.

[0050] Wherein: 1. burner, 101. cathode tail gas inlet, 102. second inlet pipe, 103. first inlet pipe, 104. outlet pipe, 105. housing, 106. second side, 107. fourth side, 108. burner outlet;

[0051] 2. First heat exchanger, 201. Hot side inlet of first heat exchanger, 202. Hot side outlet of first heat exchanger, 203. First cold side inlet, 204. Second cold side inlet, 205. First cold side outlet, 206. Second cold side outlet;

[0052] 3. The second heat exchanger, 301. The hot side inlet of the second heat exchanger, 302. The hot side outlet of the second heat exchanger, 303. The cold side inlet of the second heat exchanger;

[0053] 4. reformer, 401. cold side inlet of reformer, 402. hot side outlet of reformer, 403. cold side outlet of reformer;

[0054] 5. combustion tube, 501. lap plate, 502. first hole, 503. second hole, 504. gap, 505. end plate;

[0055] 6. Burner head, 601. Second fuel air inlet pipe, 602. First fuel air inlet pipe, 603. Swirl vane, 604. First fuel spray hole, 605. Fuel distribution chamber, 606. Second fuel spray hole. DETAILED DESCRIPTION

[0056] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0057] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof;

[0058] As introduced in the background technology, the problems in the prior art, in order to solve the above technical problems, the present invention proposes a fuel cell integrated thermal component.

[0059] Embodiment 1

[0060] In a typical embodiment of the present invention, reference is made to Figure 1 and Figure 2 As shown, a fuel cell integrated thermal component includes a burner 1, a first heat exchanger 2, a second heat exchanger 3 and a reformer 4, the burner 1 has a first side, the first heat exchanger 2 is arranged in contact with the first side of the burner 1, one side of the first heat exchanger 2 is arranged beyond one side of the burner 1 to be connected to the burner outlet 108, the length of the first heat exchanger 2 is less than the length of the first side, the second heat exchanger 3 and the reformer 4 are respectively arranged on two opposite sides of the first heat exchanger 2, at least one of the second heat exchanger 3 and the reformer 4 is in contact with the first side, and the second heat exchanger 3 and the reformer 4 are respectively in contact with the corresponding sides of the first heat exchanger 2; in this way, the second heat exchanger 3, the first heat exchanger 2 and the reformer 4 are arranged in sequence on the same side of the burner 1, or the reformer 4, the first heat exchanger 2 and the second heat exchanger 3 are arranged in sequence on the same side of the burner 1.

[0061] The burner outlet 108 is connected to the hot side inlet 201 of the first heat exchanger, the cold side inlet of the first heat exchanger 2 is connected to the cold side outlet of the second heat exchanger 3, and the branch pipe of the cold side outlet of the first heat exchanger 2 is connected to the reformer 4, which is fed with mixed fuel gas and hot air output from the hot side outlet 202 of the first heat exchanger.

[0062] In this embodiment, the burner 1, the first heat exchanger 2, the second heat exchanger 3 and the reformer 4 are all rectangular components; the burner 1 has the same height as the first heat exchanger 2, the second heat exchanger 3 and the reformer 4; the first heat exchanger 2, the second heat exchanger 3 and the reformer 4 are arranged flush with the other side away from the first side of the burner 1, and the lengths of the first heat exchanger 2, the second heat exchanger 3 and the reformer 4 along the length direction of the burner 1 (the length direction of the first side) may be the same or different.

[0063] Specifically, the hot side inlet 201 of the first heat exchanger is in communication with the burner outlet 108 via an outlet pipeline 104 having an L-shaped cross section.

[0064] According to the setting position of the second heat exchanger 3, there are two setting schemes:

[0065] The first one: reference Figure 1 and Figure 3 As shown, the second heat exchanger 3 is arranged beyond the burner 1, and the reformer 4 is arranged on the side of the first side of the burner 1 and is in contact with the first side; the cold side outlet of the first heat exchanger 2 is arranged close to the first side, and the cold side inlet 303 of the second heat exchanger protrudes from the side of the second heat exchanger 3. The cold side inlet 303 of the second heat exchanger is located on the side in the length direction of the burner 1 and is arranged at a distance from the outlet pipeline 104 with an L-shaped cross-section. The side of the second heat exchanger 3 that is in contact with the first heat exchanger 2 is flush with one side of the outlet pipeline 104.

[0066] In addition, one side of the reformer 4 is in contact with the side of the first heat exchanger 2, and the other side of the reformer is flush with the third side of the burner 1. The hot side outlet 402 of the reformer is also protruding from the reformer 4. However, since the first air inlet pipe 103 and the second air inlet pipe 102 of the burner 1 are arranged on the outside of the burner 1, it does not matter if the hot side outlet 402 of the reformer is protruding.

[0067] The second type: reference Figure 2 and Figure 4 As shown, the reformer 4 is arranged beyond the burner 1, the second heat exchanger 3 is arranged on the side of the first side of the burner 1 and is in contact with the first side, the hot side outlet 402 of the reformer protrudes from the side of the reformer 4, and the hot side outlet 402 of the reformer is located on the side of the burner 1; the cold side outlet of the second heat exchanger 3 is arranged close to the first side.

[0068] In addition, one side of the second heat exchanger 3 is fitted with the side of the first heat exchanger 2, and the cold side inlet 303 of the second heat exchanger is protruding from the side of the second heat exchanger 3, so as to ensure the length of the cold pipe in the second heat exchanger 3 while comprehensively utilizing the space; the hot side outlet 402 of the reformer is protruding from the reformer 4 and is arranged on the side in the length direction of the burner 1, and is spaced apart from the outlet pipe 104 with an L-shaped cross-section; the side of the reformer 4 fitted with the first heat exchanger 2 is flush with the side of the outlet pipe 104.

[0069] In both schemes, the cross-section of the cold side inlet of the first heat exchanger 2 is a protruding triangle, and the cold side outlet of the second heat exchanger 3 is notched, so that the cold side inlet of the first heat exchanger 2 is connected with the cold side outlet of the second heat exchanger 3. At the same time, a recess is provided at the cold side inlet 303 of the second heat exchanger, and a convex portion matching the recess is provided at the first cold side inlet 203 of the first heat exchanger 2, so that the first cold air coming out of the second heat exchanger 3 enters the first heat exchanger 2 and merges with the second cold air entering from the second cold side inlet 204 at the top of the first heat exchanger 2.

[0070] Similarly, the cross-section of the cold side outlet of the first heat exchanger 2 is a protruding triangle, and the hot side inlet of the reformer 4 is provided with a notched corner, so that the cold side outlet of the first heat exchanger 2 is connected to the hot side inlet of the reformer 4. At the same time, a recess is provided at the hot side inlet of the reformer 4, and a convex portion matching the recess is provided at the first cold side outlet 205 of the first heat exchanger 2. In addition, a second cold side outlet 206 is also provided at the top of the first heat exchanger 2, so that the first hot air coming out of the first heat exchanger 2 enters the reformer 4, and part of it is discharged through the second cold side outlet 206.

[0071] It is easy to understand that no matter which scheme is adopted, in order to facilitate the storage of pipelines and realize seamless assembly during assembly, the hot side inlet, hot side outlet and cold side inlet of the second heat exchanger 3 are all located at the top of the second heat exchanger 3; the cold side outlet, hot side inlet and hot side outlet of the reformer 4 are all arranged at the top of the reformer 4.

[0072] For easy installation, the hot side inlet 301 of the second heat exchanger and the hot side outlet 302 of the second heat exchanger are located on one diagonal line of the second heat exchanger 3, and the cold side inlet 303 of the second heat exchanger and the cold side outlet of the second heat exchanger are located on another diagonal line;

[0073] The hot side inlet 402 of the reformer 4 and the hot side outlet 402 of the reformer are located on one diagonal line of the reformer 4, and the cold side inlet 401 of the reformer and the cold side outlet 403 of the reformer are located on another diagonal line.

[0074] The cold side inlet and the cold side outlet of the first heat exchanger 2 are placed on one diagonal line of the first heat exchanger 2, and the hot side inlet 201 and the hot side outlet 202 of the first heat exchanger are placed on another diagonal line;

[0075] For burner 1, refer to Figure 5 and Figure 6 As shown, the burner 1 includes a shell 105, a combustion tube 5 is arranged inside the shell 105, a burner outlet 108 is arranged at one end of the combustion tube 5, and a plurality of burner heads 6 are arranged at the other end. The burner heads 6 are annular parts, and a distance is set between the burner heads 6 and the shell 105. The burner heads 6 realize the mixing of fuel and air.

[0076] The burner 1 is also provided with a second side 106, a third side and a fourth side 107 which are respectively vertically connected to the first side. The third side and the fourth side 107 are located on both sides of the second side 106. The first fuel inlet pipe 602 and the second fuel inlet pipe 601 are both arranged through the third side. The inlet pipe is arranged on the outside of the third side. The second side 106 is provided with a cathode exhaust gas inlet port 101, and the burner outlet 108 is arranged on the fourth side 107. The second side 106, the third side and the fourth side 107 are located in the same circle of the outer shell 105, so as to avoid the inlet pipe, the cathode exhaust gas inlet port 101 and the burner outlet of the burner 1 being arranged on the first side, which is beneficial to the arrangement of the pipelines and will not affect the placement of the entire integrated component device in a certain space.

[0077] The combustion tube 5 in the burner 1 includes two opposing support plates, which are connected by side plates. The support plates are also connected to the end plate 505. An opening through which the burner head 6 passes is provided at the end plate 505. The support plate is provided with a plurality of first holes 502 so that part of the air can enter the combustion chamber to cool the high-temperature combustion gas. The support plate includes a plurality of lap plates 501, which are overlapped and fixedly connected on the outer sides of the lap plates 501 in sequence. A gap 504 communicating with the combustion chamber is formed at the overlap between two adjacent lap plates 501. Some support plates are provided with a plurality of second holes 503 on the outer sides of the gap 504. Part of the air enters the gap 504 through the second holes 503 to form a multi-layer air film to cool the lap plates 501. The last lap plate 501 is overlapped with the burner outlet side.

[0078] In order to facilitate processing and manufacturing and to facilitate the forming of the gap, the lap plate 501 is made of a stamped plate. A part of the lap plate 501 is provided with a step-like structure facing the combustion chamber at the overlap with another lap plate 501, and a gap 504 is formed between the step-like structure and the other lap plate 501. The second hole 503 is provided at the other lap plate 501, so that air enters the gap 504 through the second hole 503 and adheres to the inner surface of the part of the lap plate 501, effectively isolating the high-temperature flame in the combustion chamber from the lap plate 501, thereby playing a cooling role.

[0079] refer to Figure 7 As shown, the burner head 6 includes a fuel distribution chamber 605, which is an annular member. The fuel distribution chamber 605 is spaced apart from the third side of the housing 105. The fuel distribution chamber 605 is arranged around the first fuel intake pipe 602. The fuel distribution chamber 605 is connected to the second fuel intake pipe 601. The first fuel intake pipe 602 passes through the housing 105 and is connected to the first intake pipe 103. The second fuel intake pipe 601 passes through the housing 105 and is connected to the second intake pipe 102. The first intake pipe 103 and the second air inlet pipe 102 are parallel to each other and are arranged on the outside of the third side surface of the outer shell 105 and are arranged along the length direction of the third outer shell 105; the outer shell 105 is also provided with a cathode exhaust gas inlet port 101, and the cathode exhaust gas enters between the combustion chamber and the outer shell 105. Swirl blades 603 are arranged inside the first fuel inlet pipe 602 and the fuel distribution chamber 605. Part of the cathode exhaust gas enters the burner head 6 and enters the combustion tube 5 after mixing with the fuel; the cathode exhaust gas inlet port 101 is located on the side of the burner head 6.

[0080] Among them, a plurality of second fuel nozzles 606 are arranged on the inner wall of the fuel distribution chamber 605 close to the combustion tube 5, and a plurality of first fuel nozzles 604 are arranged on the side wall of the first fuel inlet pipe 602. The first fuel nozzles 604 are located between the swirl blades 603 and the second fuel nozzles 606, and the first fuel nozzles 604 and the second fuel nozzles 606 are arranged at a distance.

[0081] It is easy to understand that a hot pipe and a cold pipe are arranged inside the first heat exchanger 2, both of which are S-shaped and arranged alternately. The first cold side inlet 203 and the second cold side inlet 204 of the first heat exchanger are converged inside the first heat exchanger 2 and connected with the cold pipe. The cold pipe is divided into two at the outlet to form a first cold side outlet 205 and a second cold side outlet 206.

[0082] The same is true for the interior of the second heat exchanger 3, which also includes hot pipes and cold pipes arranged in an S shape and staggered;

[0083] As for the reformer 4, the reformer 4 also adopts a rectangular body structure, and the internal structure of the reformer 4 is the same as the structure of the reformer in the prior art, that is, a hot pipe is arranged inside the reformer 4 for introducing hot air, and a cold pipe is also arranged for introducing mixed fuel gas. The hot pipeline and the cold pipeline are S-shaped and the two are arranged alternately, and a catalyst is arranged in the cold pipeline.

[0084] The cathode exhaust gas enters the burner 1, and undergoes a combustion reaction with the first fuel and / or the second fuel to obtain hot exhaust gas from the burner 1. The first cold air and the hot anode exhaust gas undergo heat exchange in the second heat exchanger 3, and the hot anode exhaust gas becomes cold anode exhaust gas. The first cold air comes out and mixes with the second cold air, and enters the first heat exchanger 2, and undergoes heat exchange with the hot exhaust gas of the burner, and the hot exhaust gas of the burner becomes cold exhaust gas of the burner. The first cold air and the second cold air become first hot air, and a portion of the first hot air enters the reformer to provide heat for the reformer 4. The mixed fuel gas undergoes a reforming reaction in the reformer 4 to become reformed gas, and the first hot air becomes the second hot air.

[0085] Embodiment 2

[0086] This embodiment discloses a fuel cell system, including a fuel cell integrated thermal component as described in the first embodiment, wherein the cathode outlet of the fuel cell is connected to the burner 1, and the anode outlet of the fuel cell is connected to the hot side inlet 301 of the second heat exchanger.

[0087] Embodiment 3

[0088] This embodiment discloses a working method of a fuel cell integrated thermal component, including the following contents:

[0089] The cathode tail gas enters the burner 1 from the cathode tail gas inlet 101, and the first fuel enters the burner 1 from the first inlet pipe 103, and / or the second fuel enters the burner 1 from the second inlet pipe 102, and is mixed with the cathode tail gas and burned to obtain high-temperature tail gas of the burner 1;

[0090] The hot anode tail gas enters the second heat exchanger 3 from the hot side inlet 301 of the second heat exchanger, and performs heat exchange with the first cold air flowing from the cold side inlet 303 of the second heat exchanger. The hot anode tail gas becomes cold anode tail gas and comes out from the hot side outlet 302 of the second heat exchanger. The first cold air directly enters the first cold side inlet 203 of the first heat exchanger from the cold side outlet of the second heat exchanger. The first cold side inlet 203 directly connects the cold side outlets of the second heat exchanger together without intermediate transition. The second cold air can be supplemented through the second cold side inlet 204 to adjust the flow rate of the cold air entering the second heat exchanger 3 and the first heat exchanger 2.

[0091] The first cold air and the second cold air enter the first heat exchanger 2 from the first cold side inlet 203 and the second cold side inlet 204 of the first heat exchanger, and the hot exhaust gas from the burner 1 enters the first heat exchanger 2 from the hot side inlet 201 of the first heat exchanger. The two perform heat exchange, and the hot exhaust gas from the burner becomes the cold exhaust gas from the burner and is discharged from the hot side outlet 202 of the first heat exchanger. The first cold air and the second cold air become the first hot air, a part of which directly enters the reformer 4 from the first cold side outlet 205 of the first heat exchanger, and a part of which is discharged from the second cold side outlet 206 of the first heat exchanger.

[0092] The burner outlet 108 is a rectangular structure, which is directly connected to the hot side inlet 201 of the first heat exchanger without the need for a gas distribution structure. Excess hot air can be discharged through the second cold side outlet 206 to adjust the hot air flow entering the reformer 4;

[0093] A portion of the first hot air enters from the hot side inlet of the reformer to provide a heat source for the reformer 4, and the mixed fuel gas enters the reformer 4 from the cold side inlet 401 of the reformer to undergo a reforming reaction. The hot air is discharged from the hot side outlet 402 of the reformer to become the second hot air, and the mixed fuel gas becomes the reformed gas and is discharged from the cold side outlet 403 of the reformer.

[0094] It is easy to understand that the cold and hot side gases of the first heat exchanger 2 and the second heat exchanger 3 are both countercurrent, and the two fluids of the reformer 4 are cocurrent.

[0095] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fuel cell integrated thermal component, characterized in that: The burner comprises a burner, the burner has a first side, a first heat exchanger is arranged in contact with the first side of the burner, one side of the first heat exchanger is arranged beyond one side of the burner to be connected to the burner outlet, the length of the first heat exchanger is less than the length of the first side, the second heat exchanger and the reformer are respectively arranged on two opposite sides of the first heat exchanger, at least one of the second heat exchanger and the reformer is in contact with the first side, and the second heat exchanger and the reformer are respectively in contact with the side corresponding to the first heat exchanger; The second heat exchanger is used to exchange heat with the hot anode tail gas, the burner outlet is connected to the hot side inlet of the first heat exchanger, the cold side inlet of the first heat exchanger is connected to the cold side outlet of the second heat exchanger, the branch pipe of the cold side outlet of the first heat exchanger is connected to the reformer, and the reformer is fed with the mixed fuel gas and the hot air output from the hot side outlet of the first heat exchanger; The burner, the first heat exchanger, the second heat exchanger and the reformer are all rectangular components; The burner is at the same height as the first heat exchanger, the second heat exchanger and the reformer; The first heat exchanger, the second heat exchanger and the reformer are arranged flush with each other on the side away from the first side of the burner; The cold side inlet and the cold side outlet of the first heat exchanger are placed on one diagonal line of the first heat exchanger, and the hot side inlet and the hot side outlet of the first heat exchanger are placed on another diagonal line; The hot side inlet of the first heat exchanger is connected to the burner outlet through an outlet pipeline with an L-shaped cross section; The first cold side outlet of the first heat exchanger is connected or docked with the hot side inlet of the reformer, and the second cold side outlet of the first heat exchanger is arranged at the top of the first heat exchanger; The cold side outlet of the second heat exchanger is connected or docked with the first cold side inlet of the first heat exchanger, and the second cold side inlet of the first heat exchanger is placed on the top of the first heat exchanger; The hot side inlet and the hot side outlet of the second heat exchanger are located on one diagonal line of the second heat exchanger, and the cold side inlet and the cold side outlet of the second heat exchanger are located on another diagonal line; The hot side inlet and the hot side outlet of the reformer are located on one diagonal line of the reformer, and the cold side inlet and the cold side outlet of the reformer are located on another diagonal line; The second heat exchanger is arranged beyond the burner, and the reformer is in contact with the first side surface; The hot side inlet, the hot side outlet and the cold side inlet of the second heat exchanger are all located at the top of the second heat exchanger; The cold side outlet of the first heat exchanger is arranged close to the first side surface; The cold side inlet of the second heat exchanger protrudes from the side of the second heat exchanger, and the cold side inlet of the second heat exchanger is located at the side of the burner; The cold side outlet, hot side inlet and hot side outlet of the reformer are all arranged at the top of the reformer; The hot side outlet of the first heat exchanger is arranged at the top of the first heat exchanger; The reformer is arranged beyond the burner, and the second heat exchanger is in contact with the first side surface; The hot side outlet of the reformer protrudes from the side of the reformer, and the hot side outlet of the reformer is located at the side of the burner; The cold side outlet of the second heat exchanger is arranged close to the first side surface.

2. A fuel cell integrated thermal component according to claim 1, characterized in that: The burner comprises a shell, a combustion tube is arranged inside the shell, a burner outlet is arranged at one end of the combustion tube, and a plurality of burner heads are arranged at the other end, the burner heads are annular parts, a distance is set between the burner heads and the shell, and the burner heads realize the mixing of fuel and air; The burner is also provided with a second side, a third side and a fourth side respectively connected to the first side, the air intake pipe is arranged through the third side, the second side is provided with a cathode tail gas inlet, and the burner outlet is arranged on the fourth side.

3. A fuel cell system, characterized in that: It comprises a fuel cell integrated thermal component as claimed in claim 1 or 2, wherein the cathode outlet of the fuel cell is connected to the burner, and the anode outlet of the fuel cell is connected to the hot side inlet of the second heat exchanger.

4. A method for operating a fuel cell integrated thermal component according to claim 1 or 2, characterized in that: It includes the following: The cathode tail gas generated at the cathode of the fuel cell enters the burner and undergoes a combustion reaction with the first fuel and / or the second fuel to obtain a burner hot tail gas; The first cold air and the hot anode tail gas are heat exchanged in the second heat exchanger, and the hot anode tail gas is converted into cold anode tail gas; The first cold air from the second heat exchanger mixes with the second cold air, enters the first heat exchanger, and exchanges heat with the hot exhaust gas of the burner. The hot exhaust gas of the burner becomes the cold exhaust gas of the burner, and the first cold air and the second cold air become the first hot air; Part of the first hot air is discharged, and part of the first hot air enters the reformer to provide heat for the reformer. The mixed fuel gas undergoes a reforming reaction in the reformer to become reformed gas, and the first hot air becomes second hot air and is discharged.

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