Reformer and fuel cell system

Abstract

The utility model discloses a reformer and a fuel cell system. Wherein the reburning device comprises a reburning device body, the reburning device body comprises a plurality of regulators, and the plurality of regulators at least comprise a first fuel mixer, a condenser, a dehydrator and a carbon dioxide remover; the plurality of regulators are configured to selectively communicate the first device and the second device through at least one of the regulators. The first equipment and the second equipment can be selectively communicated through at least one of the regulators by arranging the plurality of regulators; the contents and types of all components of the fluid output by the first equipment can be adaptively adjusted through at least one of the first fuel mixer, the condenser, the dehydrator and the carbon dioxide remover according to actual working condition requirements, so that the fluid conveyed to the second equipment meets working requirements. The utilization rate of fluid output by the first equipment is effectively improved, the working performance of the second equipment can be effectively improved, the service life of the second equipment can be effectively prolonged, and extra energy consumption caused in the prior art can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cell systems, in particular to a fuel reformer and a fuel cell system. Background Art

[0002] Clean energy is becoming more and more popular. Fuel cells are a type of chemical power generation device that directly converts the chemical energy stored in fuel into electrical energy in an efficient and environmentally friendly manner. Therefore, it is generally believed that they will be widely used in the future.

[0003] For a fuel cell system, the energy entering the fuel cell system can be roughly divided into energy converted into electrical energy and energy to maintain the operation of the system to balance the heat loss of the system. The device that supplements the heat loss and releases the energy in the tail gas in the system is usually a burner. If the anode tail gas of the stack is directly passed into the burner, under the system design where the temperature of the anode tail gas cannot be changed, the flammability of the flame in the burner depends only on the components of the anode tail gas. Specifically, the anode tail gas is composed of methane or hydrocarbons, carbon monoxide, hydrogen, water and carbon dioxide that are not completely modified and reformed. The content of water and carbon dioxide in the anode tail gas will increase with the increase of the fuel utilization rate of the stack, and the content of combustibles will decrease with the increase of the fuel utilization rate of the stack, so it will cause the remaining combustibles in the anode tail gas to be difficult to maintain flame combustion; in addition, because the ratio of air to fuel is between 10 and 40 when the fuel cell system is running stably, the proportion of combustibles is low, which will also cause the remaining combustibles in the anode tail gas to be difficult to maintain flame combustion, resulting in poor flame stability of the burner. In the prior art, a fuel channel is usually directly set up to supplement fuel to the burner to maintain the flame stability of the burner. However, this operation will lead to a decrease in the exhaust gas utilization rate of the fuel cell system, thereby reducing the system efficiency of the fuel cell system and increasing energy consumption. Utility Model Content

[0004] The utility model aims to provide a burner reformer and a fuel cell system to solve the problem in the prior art that directly setting a fuel channel to supplement fuel to the burner will lead to a decrease in the exhaust gas utilization rate of the fuel cell system and an increase in energy consumption.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] The burner is arranged between the first device and the second device, and comprises:

[0007] A burner body, the burner body comprising a plurality of regulators, the plurality of regulators comprising at least a first fuel mixer, a condenser, a water remover and a carbon dioxide remover;

[0008] The plurality of regulators are configured to selectively connect the first device and the second device via at least one of the regulators.

[0009] As a preferred solution of the above-mentioned fuel reformer, the fuel reformer body further includes a first pipeline, the plurality of regulators are connected through the first pipeline, and the two ends of the first pipeline are respectively used to communicate with the first device and the second device;

[0010] The reformer body further comprises a plurality of second pipelines and a plurality of control valves, wherein the plurality of second pipelines, the plurality of control valves and the plurality of regulators are arranged in a one-to-one correspondence;

[0011] The upstream port of the second pipeline is connected to the first pipeline through the control valve, the downstream port of the second pipeline is communicated with the first pipeline, and the regulator is distributed between the upstream port and the downstream port of the second pipeline;

[0012] The control valve can selectively connect the first pipeline and the second pipeline, and / or connect the first pipeline and the regulator.

[0013] As a preferred solution of the above-mentioned burner reformer, the control valve is a flow distribution valve.

[0014] A fuel cell system, comprising a fuel cell stack, a fuel supply assembly, an air supply assembly and a burner, and also comprising the above-mentioned fuel reformer, wherein the first device is the fuel cell stack, and the second device is the burner;

[0015] The fuel supply assembly, the anode of the fuel cell stack, the reformer and the burner form an anode flow path; the air supply assembly, the cathode of the fuel cell stack and the burner form a cathode flow path.

[0016] As a preferred solution of the above fuel cell system, the fuel cell system further includes a circulator, which is used to return the fluid output from the reformer and / or the fluid output from the anode output end of the fuel cell stack to the anode input end of the fuel cell stack.

[0017] As a preferred embodiment of the above-mentioned fuel cell system, the fuel cell system further includes a second fuel mixer, which is used to mix the fuel output by the fuel supply assembly and the fluid refluxed by the circulator pump, and deliver them to the anode input end of the stack.

[0018] As a preferred solution of the above fuel cell system, the fuel cell system further comprises a reformer, which is used to reform the fluid output from the second fuel mixer and deliver it to the anode input end of the fuel cell stack.

[0019] As a preferred solution of the above fuel cell system, the circulator is a circulation pump or an ejector.

[0020] As a preferred embodiment of the above-mentioned fuel cell system, the fuel cell system further comprises a heat exchanger, which can heat the fuel supplied by the fuel supply assembly and / or the air supplied by the air supply assembly through the exhaust heat of the burner.

[0021] As a preferred solution of the above fuel cell system, there are multiple stacks, anodes of multiple stacks are connected in series in sequence, and cathodes of multiple stacks are connected in series in sequence;

[0022] The reformer is distributed between at least one fuel cell stack group; and / or, the reformer is distributed between the burner and one of the fuel cell stack anodes adjacent to the burner;

[0023] Wherein, any two adjacent battery stacks form the battery stack group.

[0024] Beneficial effects of the utility model:

[0025] The utility model provides a fuel reformer. The fuel reformer is arranged between the first device and the second device, and includes a fuel reformer body, and the fuel reformer body includes a plurality of regulators, and the plurality of regulators include at least a first fuel mixer, a condenser, a water remover and a carbon dioxide remover; the plurality of regulators are configured to selectively connect the first device and the second device through at least one of them. The fuel reformer can selectively connect the first device and the second device through at least one of them by setting a plurality of regulators, so that the content and type of each component of the fluid output by the first device can be adjusted according to the actual working conditions through at least one of the first fuel mixer, the condenser, the water remover and the carbon dioxide remover, so that the fluid delivered to the second device meets the working requirements. The utilization rate of the fluid output by the first device can be effectively improved, and the working performance and service life of the second device can be effectively improved, and the additional energy consumption caused in the prior art can be effectively reduced.

[0026] The utility model also provides a fuel cell system, which includes a stack, a fuel supply assembly, an air supply assembly and a burner, and also includes the above-mentioned burner reformer, wherein the first device is the stack, and the second device is the burner; the fuel supply assembly, the anode of the stack, the burner reformer and the burner form an anode flow path; the air supply assembly, the cathode of the stack and the burner form a cathode flow path. By adopting the above-mentioned burner reformer, the anode tail gas delivered to the burner is easy to burn and generate heat, so as to effectively improve the combustion stability of the burner, and can effectively improve the system efficiency of the fuel cell system and effectively reduce energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of a burner reformer provided by a specific embodiment of the utility model;

[0028] Figure 2 The principle of the fuel cell system provided by the specific embodiment of the utility model is Figure 1 ;

[0029] Figure 3 The principle of the fuel cell system provided by the specific embodiment of the utility model is Figure 2 ;

[0030] Figure 4 The principle of the fuel cell system provided by the specific embodiment of the utility model is Figure 3 ;

[0031] Figure 5 The principle of the fuel cell system provided by the specific embodiment of the utility model is Figure 4 .

[0032] In the figure:

[0033] 1. Change the burner;

[0034] 111. a first fuel mixer; 112. a condenser; 113. a water remover; 114. a carbon dioxide remover;

[0035] 12. First pipeline;

[0036] 13. Second pipeline;

[0037] 14. Control valve;

[0038] 21. Fuel stack; 22. Fuel supply assembly; 23. Air supply assembly; 24. Burner; 25. Circulator; 26. Second fuel mixer; 27. Reformer; 28. Heat exchanger. DETAILED DESCRIPTION

[0039] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0040] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0042] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0043] For a fuel cell system, the energy entering the fuel cell system can be roughly divided into energy converted into electrical energy and energy to maintain the operation of the system to balance the heat loss of the system. The device that supplements the heat loss and releases the energy in the tail gas in the system is usually a burner. If the anode tail gas of the stack is directly passed into the burner, under the system design where the temperature of the anode tail gas cannot be changed, the flammability of the flame in the burner depends only on the components of the anode tail gas. Specifically, the anode tail gas is composed of methane or hydrocarbons, carbon monoxide, hydrogen, water and carbon dioxide that are not completely modified and reformed. The content of water and carbon dioxide in the anode tail gas will increase with the increase of the fuel utilization rate of the stack, and the content of combustibles will decrease with the increase of the fuel utilization rate of the stack, so it will cause the remaining combustibles in the anode tail gas to be difficult to maintain flame combustion; in addition, because the ratio of air to fuel is between 10 and 40 when the fuel cell system is running stably, the proportion of combustibles is low, which will also cause the remaining combustibles in the anode tail gas to be difficult to maintain flame combustion, resulting in poor flame stability of the burner. In the prior art, a fuel channel is usually directly set up to supplement fuel to the burner to maintain the flame stability of the burner. However, this operation will lead to a decrease in the exhaust gas utilization rate of the fuel cell system, thereby reducing the system efficiency of the fuel cell system and increasing energy consumption.

[0044] Therefore, the utility model provides a combustion reformer 1. Figure 1 As shown, the burner 1 is arranged between the first device and the second device, and the burner 1 includes a burner body, and the burner body includes a plurality of regulators, and the plurality of regulators include at least a first fuel mixer 111, a condenser 112, a water remover 113 and a carbon dioxide remover 114; the plurality of regulators are configured to selectively connect the first device and the second device through at least one of them. The burner 1 can selectively connect the first device and the second device through at least one of them by setting a plurality of regulators, so that the content and type of each component of the fluid output by the first device can be adjusted according to the actual working condition requirements through at least one of the first fuel mixer 111, the condenser 112, the water remover 113 and the carbon dioxide remover 114, so that the fluid delivered to the second device meets the working requirements. It can effectively improve the utilization rate of the fluid output by the first device, and can effectively improve the working performance and service life of the second device, and can effectively reduce the additional energy consumption caused by the prior art.

[0045] It is understandable that other types of regulators may be adaptively introduced according to actual working conditions.

[0046] Optionally, the number of the first fuel mixers 111, and / or the number of the condensers 112, and / or the number of the dehydrators 113, and / or the number of the decarbonation devices 114 can be adjusted according to actual working conditions. This is to further improve the working performance and service life of the second device. Among them, the specific structure of the first fuel mixer 111, the specific structure of the condenser 112, the specific structure of the dehydrator 113, and the specific structure of the decarbonation device 114 are all prior art and will not be repeated here.

[0047] Exemplarily, in the fuel cell system, the first device is the stack 21, and the second device is the burner 24. By setting a plurality of regulators, the anode output end of the stack 21 and the burner 24 can be selectively connected through at least one of them, so that the content and type of each component of the fluid output from the anode output end of the stack 21 can be adaptively adjusted through at least one of the first fuel mixer 111, the condenser 112, the water remover 113 and the carbon dioxide remover 114 according to the content of water and carbon dioxide in the anode tail gas output from the anode output end of the stack 21, so that the anode tail gas delivered to the burner 24 is easy to burn and generate heat, so as to effectively improve the combustion stability of the burner 24. It can be understood that when the anode tail gas is more combustible, the amount of fuel that needs to be delivered to the burner 24 alone will be reduced accordingly, so that the energy consumption can be effectively reduced, and the system efficiency of the fuel cell system can be effectively improved.

[0048] Among them, Figure 1 As shown, the burner body also includes a first pipeline 12, multiple regulators are connected through the first pipeline 12, and the two ends of the first pipeline 12 are respectively used to communicate with the first device and the second device; the burner body also includes multiple second pipelines 13 and multiple control valves 14, and the multiple second pipelines 13, multiple control valves 14 and multiple regulators are arranged one by one; the upstream port of the second pipeline 13 is connected to the first pipeline 12 through the control valve 14, and the downstream port of the second pipeline 13 is connected to the first pipeline 12, and the regulators are distributed between the upstream port and the downstream port of the second pipeline 13; the control valve 14 can selectively connect the first pipeline 12 and the second pipeline 13, and / or, connect the first pipeline 12 and the regulator. Such a setting can realize the selective connection of the first device and the second device through at least one of the multiple regulators, so that the content and type of each component of the fluid output by the first device can be adjusted adaptively according to the actual working condition requirements through at least one of the first fuel mixer 111, the condenser 112, the dehumidifier 113 and the carbon dioxide remover 114.

[0049] Among them, the arrangement order of the first fuel mixer 111, the condenser 112, the dehumidifier 113 and the carbon dioxide remover 114 in the plurality of regulators from upstream to downstream along the first pipeline 12 can be adaptively set according to actual working conditions. Figure 1 As shown, the exemplary arrangement of multiple regulators includes a first fuel mixer 111, a condenser 112, a water remover 113 and a carbon dioxide remover 114, and the first fuel mixer 111, the condenser 112, the water remover 113 and the carbon dioxide remover 114 are arranged in sequence from the upstream to the downstream of the first pipeline 12. It can be understood that by regulating the multiple control valves 14, the reformer 1 can perform a single refueling, a single condensing fluid, a single removal of water from the fluid, and a single removal of carbon dioxide from the fluid, and can also combine at least two functions of refueling, condensing fluid, removing water from the fluid, and removing carbon dioxide from the fluid. For example, combining refueling and condensing fluid, combining refueling and removing water from the fluid, combining removing carbon dioxide from the fluid and removing water from the fluid, etc.

[0050] Specifically, the control valve 14 is a flow distribution valve. It can selectively connect the first pipeline 12 and the second pipeline 13, and / or connect the first pipeline 12 and the regulator. Preferably, the flow distribution valve is an electrically controlled flow distribution valve. In other embodiments, the flow distribution valve can also be a manual flow distribution valve.

[0051] It is understandable that if Figure 1 As shown, when each control valve 14 is connected to the first pipeline 12 and the corresponding second pipeline 13, the first device and the second device are directly connected, thereby further improving the performance of the reformer 1.

[0052] The utility model also provides a fuel cell system, such as Figure 1-5 As shown, it includes a fuel cell stack 21, a fuel supply assembly 22, an air supply assembly 23 and a burner 24, and also includes the above-mentioned reformer 1. The first device is the fuel cell stack 21, and the second device is the burner 24; the fuel supply assembly 22, the anode of the fuel cell stack 21, the reformer 1 and the burner 24 form an anode flow path; the air supply assembly 23, the cathode of the fuel cell stack 21, and the burner 24 form a cathode flow path.

[0053] By adopting the above-mentioned burner reformer 1, the anode tail gas delivered to the burner 24 is easy to burn and generate heat, so as to effectively improve the combustion stability of the burner 24, and can effectively improve the system efficiency of the fuel cell system and effectively reduce energy consumption.

[0054] It is preferred that the first fuel mixer 111 can be communicated with the fuel supply assembly 22, so that the fuel can be replenished through the first fuel mixer 111. Specifically, the first fuel mixer 111 is provided with a first fuel replenishing port, and the first fuel replenishing port can be communicated with the fuel supply assembly 22.

[0055] Specifically, the burner 24 is also provided with a second fuel supply port, so that additional fuel can be supplied to the burner 24, so that the thermal balance of the fuel cell system can be maintained by additional fuel supply. Further specifically, the second fuel supply port can be communicated with the fuel supply assembly 22.

[0056] Specifically, a temperature sensor is provided at the exhaust gas outlet of the burner 24. The exhaust gas outlet temperature of the burner 24 can be monitored by the temperature sensor, and the amount of additional fuel supply can be conveniently regulated according to the exhaust gas outlet temperature of the burner 24.

[0057] Alternatively, if Figure 2-5 As shown, the fuel cell system further includes a circulator 25, which is used to return the fluid output from the reformer 1 and / or the fluid output from the anode output end of the stack 21 to the anode input end of the stack 21. This can further improve the fuel utilization rate of the fuel cell system and improve the working performance of the stack 21. Figure 2 and Figure 4 In the example, the fluid output from the anode output end of the stack 21 is circulated back to the anode input end of the stack 21 through the circulator 25 . Figure 3 and Figure 5 In the example, the fluid output from the reformer 1 is refluxed to the anode input terminal of the fuel cell stack 21 through the circulator 25. Specifically, the circulator 25 is a circulation pump. Or the circulator 25 is an ejector. It can be understood that the circulation pump can adjust the circulation flow, but it is an electrically driven device and will be affected by the temperature of the fluid; the ejection flow of the ejector is quantitative, but does not require additional energy consumption, and will not be affected by the temperature of the fluid. Therefore, the use of a circulation pump or an ejector can be adaptively selected according to the actual working conditions. In this embodiment, if Figure 2-5 As shown, the circulator 25 is exemplarily configured as a circulation pump.

[0058] Further optionally, if Figure 2-5 As shown, the fuel cell system further includes a second fuel mixer 26, which is used to mix the fuel output by the fuel supply assembly 22 and the fluid refluxed by the circulator 25, and deliver them to the anode input end of the stack 21. This can improve the mixing uniformity of the fuel, thereby further improving the working performance of the stack 21.

[0059] Specifically, Figure 2-5As shown, the fuel cell system further includes a reformer 27, which is used to reform the fluid output from the second fuel mixer 26 and deliver it to the anode input end of the stack 21 to ensure the working performance of the stack 21. Specifically, in this embodiment, Figure 2-5 As shown, the fluid output from the second fuel mixer 26 is delivered to the anode input end of the fuel cell stack 21 through the reformer 27 .

[0060] Optionally, the fuel cell system further includes a heat exchanger 28, which can heat the fuel supplied by the fuel supply assembly 22 and / or the air supplied by the air supply assembly 23 through the exhaust heat of the burner 24. This can further improve the fuel utilization rate of the fuel cell system and further improve the working performance of the fuel cell system. Figure 2-5 As shown, the exhaust heat of the exemplary burner 24 is used to heat the air supplied by the air supply assembly 23 through the heat exchanger 28 .

[0061] It is understandable that the number and location of the heat exchangers 28 can be adaptively adjusted according to actual working conditions, so as to further improve the utilization rate of the exhaust heat of the burner 24 and the working performance of the fuel cell system.

[0062] Alternatively, if Figure 4-5 As shown, there are multiple fuel cell stacks 21, anodes of multiple fuel cell stacks 21 are connected in series, cathodes of multiple fuel cell stacks 21 are connected in series; the fuel reformer 1 is distributed between at least one fuel cell stack group; and / or, the fuel reformer 1 is distributed between the burner 24 and an anode of a fuel cell stack 21 adjacent to the burner 24; wherein any two adjacent fuel cell stacks 21 form a fuel cell stack group. It is understandable that for a fuel cell system including multiple fuel cell stacks 21, the setting position of the fuel reformer 1 and the regulating effect of the fuel reformer 1 can be adaptively adjusted according to actual working conditions. Exemplarily, Figure 2 and Figure 3 A battery stack 21 is provided in each of the batteries. Figure 4 and Figure 5 Two battery stacks 21 are provided in each case.

[0063] For example, Figure 2 The input end of the middle circulator 25 is connected to the pipeline between the anode output end of the stack 21 and the reformer 1; the output end of the circulator 25 is connected to the second fuel mixer 26. The circulator 25 improves the fuel utilization rate, but the improvement of the fuel utilization rate will lead to a decrease in the combustible components in the anode tail gas of the stack 21. Therefore, the reformer 1 is arranged between the input end of the circulator 25 and the pipeline connected to the burner 24, which can effectively improve the combustibility of the anode tail gas of the stack 21, so that the burner 24 can maintain stable combustion when the fuel cell system has high power generation efficiency.

[0064] For example, Figure 3 The input end of the middle circulator 25 is connected to the pipeline between the reformer 1 and the burner 24; the output end of the circulator 25 is connected to the second fuel mixer 26. The circulator 25 is used to improve the fuel utilization rate, but the improvement of the fuel utilization rate will lead to a decrease in the combustible components in the anode tail gas of the stack 21. Therefore, the reformer 1 is arranged between the anode output end of the stack 21 and the input end of the circulator 25, which can effectively improve the combustibility of the anode tail gas of the stack 21, so that the burner 24 can maintain stable combustion when the fuel cell system has a high power generation efficiency; secondly, the reformer 1 is arranged between the anode output end of the stack 21 and the input end of the circulator 25, and the oxygen-carbon ratio of the fuel entering the anode of the stack 21 can also be synchronously adjusted, so that the voltage efficiency of the stack 21 can be effectively improved.

[0065] For example, Figure 4 The input end of the middle circulator 25 is connected to the pipeline between the anodes of two adjacent stacks 21; the output end of the circulator 25 is connected to the pipeline between the reformer 27 and the anode input end of an upstream stack 21. For a fuel cell system with two stacks 21 or even multiple stacks 21, the proportion of combustibles in the anode tail gas will be smaller. By setting a reformer 1 between the burner 24 and the anode of the stack 21 adjacent to the burner 24, the combustibility of the anode tail gas of the stack 21 can be effectively improved, so that the burner 24 can maintain stable combustion when the fuel cell system has high power generation efficiency.

[0066] For example, Figure 5 The input end of the middle circulator 25 is connected to the pipeline between the reformer 1 and the anode input end of the stack 21; the output end of the circulator 25 is connected to the pipeline between the reformer 27 and the anode input end of the stack 21. For a fuel cell system with two stacks 21 or even multiple stacks 21, the proportion of combustibles in the anode tail gas will be smaller. By setting the reformer 1 between two adjacent stacks 21, the combustibility of the anode tail gas of the stack 21 can be effectively improved, so that the burner 24 can maintain stable combustion when the fuel cell system has high power generation efficiency; secondly, it enables the oxygen-carbon ratio of the fuel entering the anode of the next-level stack 21 to be adjusted synchronously.

[0067] It can be understood that if the burner reformer 1 is distributed between the fuel cell stack 21 and the burner 24, then the burner reformer 1 can only improve the combustion characteristics of the anode exhaust gas and the combustion stability of the burner 24. At this time, the water and carbon dioxide in the anode exhaust gas can be completely removed according to the actual working conditions, and then the burner 24 can be additionally supplied with fuel based on the thermal balance control of the system.

[0068] If the burner reformer 1 is located between two adjacent stacks 21 or upstream of the input end of the circulator 25, the amount of water and carbon dioxide removed is affected by the oxygen-carbon ratio of the stack 21. Specifically, in a fuel cell system in which two or more stacks 21 are connected in series, if the burner reformer 1 is located upstream of the input end of the circulator 25, the oxygen-carbon ratio of the previous stack 21 will be affected; if the burner reformer 1 is located downstream of the input end of the circulator 25, the oxygen-carbon ratio of the next stack 21 will be affected.

[0069] Specifically, the method of regulating the additional fuel supply to the burner 24 according to the heat balance of the system is: judging whether the amount of additional fuel supplied to the burner 24 meets the demand according to the outlet temperature of the burner 24; if the amount of additional fuel supplied to the burner 24 does not meet the demand, the amount of additional fuel supplied is adaptively regulated. Specifically, if the amount of additional fuel supplied to the burner 24 is too much, the amount of additional fuel supplied is adaptively reduced; if the amount of additional fuel supplied to the burner 24 is too little, the amount of additional fuel supplied is adaptively increased.

[0070] It should be noted that the burner 1 should first ensure that the fuel cell stack 21 operates at an optimal oxygen-carbon ratio, and then appropriately sacrifice part of the system efficiency by additionally supplying fuel to improve the combustibility of the anode tail gas.

[0071] Among them, Figure 2-5 As shown, the fuel supply assembly 22 includes at least a fuel tank, which is used to store fuel. It is understandable that a first filter may be provided between the fuel tank and the second fuel mixer 26 according to actual working conditions. A delivery pump may be provided between the fuel tank and the second fuel mixer 26 according to actual working conditions. A flow regulating valve and a first switch valve and other structures may also be provided between the fuel tank and the second fuel mixer 26 according to actual working conditions. Preferably, the flow regulating valve is an electric flow regulating valve. Preferably, the first switch valve is an electric switch valve. Wherein, the fuel stored in the fuel tank is hydrocarbons such as methane and natural gas, or the fuel is hydrogen, etc.

[0072] Among them, Figure 2-5 As shown, the air supply assembly 23 includes at least a fan, which is used to deliver air to the stack 21. Preferably, the fan is a variable frequency fan. It is understandable that a second filter can also be provided between the fan and the cathode input end of the stack 21 according to actual working conditions. A second switch valve and other structures can also be provided between the fan and the cathode input end of the stack 21 according to actual working conditions. Preferably, the second switch valve is an electric switch valve.

[0073] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A burner, arranged between the first device and the second device, characterized in that: include: A burner body, the burner body comprising a plurality of regulators, the plurality of regulators comprising at least a first fuel mixer (111), a condenser (112), a water remover (113) and a carbon dioxide remover (114); The plurality of regulators are configured to selectively connect the first device and the second device via at least one of the regulators.

2. The reformer according to claim 1, characterized in that: The reformer body further comprises a first pipeline (12), a plurality of the regulators are connected via the first pipeline (12), and two ends of the first pipeline (12) are respectively used to communicate with the first device and the second device; The reformer body further comprises a plurality of second pipelines (13) and a plurality of control valves (14), wherein the plurality of second pipelines (13), the plurality of control valves (14) and the plurality of regulators are arranged in a one-to-one correspondence; The upstream port of the second pipeline (13) is connected to the first pipeline (12) through the control valve (14), the downstream port of the second pipeline (13) is in communication with the first pipeline (12), and the regulator is distributed between the upstream port and the downstream port of the second pipeline (13); The control valve (14) can selectively connect the first pipeline (12) and the second pipeline (13), and / or connect the first pipeline (12) and the regulator.

3. The reformer according to claim 2, characterized in that: The control valve (14) is a flow distribution valve.

4. A fuel cell system, comprising a fuel cell stack (21), a fuel supply assembly (22), an air supply assembly (23) and a burner (24), characterized in that: It also comprises the reformer according to any one of claims 1 to 3, wherein the first device is the fuel cell stack (21), and the second device is a burner (24); The fuel supply assembly (22), the anode of the fuel cell stack (21), the reformer and the burner (24) form an anode flow path; the air supply assembly (23), the cathode of the fuel cell stack (21) and the burner (24) form a cathode flow path.

5. The fuel cell system according to claim 4, characterized in that: The fuel cell system further comprises a circulator (25), wherein the circulator (25) is used to return the fluid output by the reformer and / or the fluid output by the anode output end of the fuel cell stack (21) to the anode input end of the fuel cell stack (21).

6. The fuel cell system according to claim 5, characterized in that: The fuel cell system also includes a second fuel mixer (26), which is used to mix the fuel output by the fuel supply assembly (22) and the fluid returned by the circulator (25), and transport the mixture to the anode input end of the fuel cell stack (21).

7. The fuel cell system according to claim 6, characterized in that: The fuel cell system further comprises a reformer (27), wherein the reformer (27) is used to reform the fluid output from the second fuel mixer (26) and transmit the reformed fluid to the anode input end of the fuel cell stack (21).

8. The fuel cell system according to claim 5, characterized in that: The circulator (25) is a circulation pump or an ejector.

9. The fuel cell system according to any one of claims 4 to 8, characterized in that: The fuel cell system further comprises a heat exchanger (28), wherein the heat exchanger (28) can heat the fuel supplied by the fuel supply assembly (22) and / or the air supplied by the air supply assembly (23) through the exhaust heat of the burner (24).

10. The fuel cell system according to any one of claims 4 to 8, characterized in that: The number of the battery stacks (21) is multiple, the anodes of the multiple battery stacks (21) are connected in series in sequence, and the cathodes of the multiple battery stacks (21) are connected in series in sequence; The reformer is distributed between at least one fuel cell stack group; and / or, the reformer is distributed between the burner (24) and an anode of the fuel cell stack (21) adjacent to the burner (24); Any two adjacent battery stacks (21) form the battery stack group.

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