Fuel cell reforming system

Abstract

The present invention relates to the field of fuel cell technology, and in particular to a fuel cell reforming system, including a burner and a reformer. The burner can be used for burning fuel, and a heat transfer surface is arranged on the surface of the burner. The heat generated by the combustion of the fuel will be discharged through the heat transfer surface. The reformer encloses the burner and fits the heat transfer surface. The heat discharged by the heat transfer surface can be directly transferred to the reformer. The reformer has a reforming cavity built in, and the reforming cavity is located on the side of the heat transfer surface. The heat is further directly guided to the reforming cavity through the reformer, thereby providing the required heat for the reforming of the fuel in the reformer through a catalyst, thereby realizing the reforming of the fuel. Through the above settings of the reforming system, the heat transfer efficiency of the reformer and the burner can be effectively improved, thereby realizing efficient use of the heat of the burner and realizing efficient reforming of the fuel.

Description

Technical Field

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

[0002] With the increasing depletion of traditional oil and coal resources and the increasingly serious environmental pollution problems, the development and utilization of clean and cheap fuel resources have received widespread attention. Hydrogen is an ideal clean energy source. Its only combustion product is H2O, which does not pollute the environment. In addition, hydrogen is widely used in aerospace, urban transportation, fuel cells and other fields. Among them, methane is abundant in source and is the preferred raw material for hydrogen production. The process of hydrogen production by reforming methane water vapor through a reformer has a high hydrogen production rate and is an effective way to solve the hydrogen source problem.

[0003] For example, a micro methane reforming hydrogen generator is disclosed in a patent document with publication number CN210103451U. The reforming hydrogen generator includes a shell with an inner cavity, the inner cavity of the shell forms a heating chamber, and a heating gas inlet and a residual gas outlet connected to the heating chamber are respectively arranged on both sides of the shell; a preheating mixing chamber is arranged at the bottom of the heating chamber, and a reforming gas mixing chamber is arranged at the top of the heating chamber; a plurality of reaction tubes are arranged in the heating chamber. By evenly distributing the reaction tubes in the heating chamber, the reformer can make full use of the heat of the combustion gas to evenly heat each reaction tube, thereby avoiding problems such as reduced efficiency due to uneven heat.

[0004] Although the existing reformer can achieve the transfer of fuel gas heat inside the reformer to a certain extent through the reaction tubes, the catalyst bed inside the reaction tube still has a significant radial temperature gradient, uneven temperature distribution, and low heat transfer efficiency. Therefore, the reformer is generally heated from the exhaust gas of the burner. Since the heat transfer efficiency between the exhaust gas and the reformer is not high, it is difficult to fully utilize the heat generated by the burner. Summary of the invention

[0005] In view of this, it is necessary to provide a fuel cell reforming system to solve the technical problems in the prior art that the heat transfer efficiency between the reformer and the burner is low and it is difficult to fully utilize the heat generated by the burner.

[0006] In order to achieve the above technical objectives, the technical solution of the present invention provides a fuel cell reforming system, comprising:

[0007] A burner is used for fuel combustion and has a heat transfer surface disposed on its surface, wherein the heat transfer surface is located on the periphery of the burner;

[0008] The reformer surrounds the burner and is in contact with the heat transfer surface. A reforming chamber is built in the reforming chamber. The reforming chamber is arranged along the circumference of the heat transfer surface and is used to fill the catalyst and reform the fuel.

[0009] Furthermore, the reformer includes an annular shell, an air intake module and an exhaust module, the reforming chamber is arranged inside the shell, and the interior of the annular shell is also provided with an air intake chamber and an exhaust chamber, the air intake chamber and the exhaust chamber are respectively located at two ends of the reforming chamber and are connected to the reforming chamber, and the air intake module and the exhaust module are respectively connected to the air intake chamber and the exhaust chamber.

[0010] Furthermore, the air intake module includes a first annular tube and a plurality of air intake pipes, the first annular tube is located on the upper side of the air intake cavity, the air intake pipes are spaced apart along the circumferential direction of the first annular tube, and the two ends of each air intake pipe are respectively connected to the first annular tube and the air intake cavity.

[0011] Furthermore, the reformer also includes a fuel mixing module, which includes a steam pipe, a fuel pipe and a static mixer. The static mixer is connected to the air intake module, and the steam pipe and the fuel pipe are both connected to the static mixer. The steam pipe is used to introduce high-temperature steam, and the fuel pipe is used to introduce reforming fuel.

[0012] Furthermore, the air inlet end of the steam pipe extends into the reforming chamber and is coiled around the side wall of the reforming chamber, and the air outlet end of the steam pipe extends out of the reforming chamber and is connected to the static mixer.

[0013] Furthermore, the exhaust module includes a second annular tube and a plurality of exhaust pipes, the second annular tube is located at the lower side of the exhaust cavity, the exhaust pipes are spaced apart along the circumferential direction of the second annular tube, and both ends of the exhaust pipes are respectively connected to the second annular tube and the exhaust cavity.

[0014] Furthermore, an air intake partition plate is provided inside the annular shell, the air intake chamber and the reforming chamber are respectively located on two sides of the air intake partition plate, and the air intake partition plate is provided with a plurality of evenly distributed air intake distribution holes.

[0015] Furthermore, an exhaust partition plate is also provided inside the annular shell, the exhaust chamber and the reforming chamber are respectively located on both sides of the exhaust partition plate, and the exhaust partition plate is provided with a plurality of evenly distributed exhaust gas outlet holes.

[0016] Furthermore, the burner includes a combustion shell, a gas distribution component, a fuel pipe and an air pipe. The gas distribution component is installed inside the combustion shell and divides the combustion shell into a combustion chamber and a fuel chamber. The gas distribution component is provided with a plurality of gas distribution holes. The fuel pipe is connected to the fuel chamber. The air pipe is connected to the gas distribution component and is connected to the combustion chamber.

[0017] Furthermore, the gas distribution component is tapered, and the inner diameter of each gas distribution hole gradually increases from the inside to the outside.

[0018] Compared with the prior art, the beneficial effects of the fuel cell reforming system of the present invention include: a burner and a reformer are provided, the burner can be used for burning fuel, a heat transfer surface is provided on the surface, the heat transfer surface is located on the periphery of the burner, the heat generated by the combustion of the fuel will be discharged through the heat transfer surface, the reformer encloses the burner and fits with the heat transfer surface, the heat discharged by the heat transfer surface can be directly transferred to the reformer, the reformer has a reforming chamber built in, the reforming chamber is located on the periphery of the heat transfer surface, the heat is further directly guided to the reforming chamber through the reformer, and then the required heat is provided for the reforming of the fuel in the reformer through the catalyst, thereby realizing the reforming of the fuel, and through the above settings of the reforming system, while ensuring uniform temperature distribution, the heat transfer efficiency of the reformer and the burner can be effectively improved, thereby realizing efficient utilization of the burner heat and realizing efficient reforming of the fuel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of a fuel cell reforming system provided by an embodiment of the present invention;

[0020] Figure 2 is a front view of a fuel cell reforming system provided by an embodiment of the present invention;

[0021] Figure 3 is along Figure 2 Sectional view along line AA;

[0022] Figure 4 It is a cross-sectional view of a burner provided in an embodiment of the present invention.

[0023] Among them, the reference numerals in the figure are:

[0024] 10 - burner 11 - heat transfer surface 12 - combustion shell

[0025] 13 - gas distribution parts 14 - gas pipe 15 - air pipe

[0026] 20—Reformer 21—Reforming chamber 22—Annular shell

[0027] 23 - Intake module 24 - Exhaust module 25 - Fuel mixing module

[0028] 121 - combustion chamber 122 - fuel chamber 131 - gas distribution hole

[0029] 211—intake partition plate 212—exhaust partition plate 221—intake cavity

[0030] 222—exhaust chamber 231—first annular pipe 232—intake pipe

[0031] 241 - second annular pipe 242 - exhaust pipe 251 - steam pipe

[0032] 252 - fuel pipe 253 - static mixer 2111 - air intake distribution hole

[0033] 2121—Exhaust gas outlet hole. DETAILED DESCRIPTION

[0034] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0035] The embodiment of the present invention provides a fuel cell reforming system for reforming fuel and passing the reformed fuel into a fuel cell stack for use by the fuel cell stack. Figures 1 to 3 As shown, the fuel cell reforming system includes a burner 10 and a reformer 20. The burner 10 is used for fuel combustion and has a heat transfer surface 11 on its surface. The heat transfer surface 11 is located on the periphery of the burner 10. The reformer 20 surrounds the burner 10 and is in contact with the heat transfer surface 11. The reformer 20 has a reforming chamber 21 built in. The reforming chamber 21 is located on the periphery of the heat transfer surface 11 and is used for filling a catalyst and reforming the fuel.

[0036] Specifically, the fuel cell reforming system is provided with a burner 10 and a reformer 20. The burner 10 can be used for burning fuel, and a heat transfer surface 11 is provided on the surface. The heat transfer surface 11 is located on the peripheral side of the burner 10. The heat generated by the combustion of the fuel will be discharged through the heat transfer surface 11. The reformer 20 encloses the burner 10 and is in contact with the heat transfer surface 11. The heat discharged by the heat transfer surface 11 can be directly transferred to the reformer 20. The reformer 20 has a reforming chamber 21 built in it. The reforming chamber 21 is located on the peripheral side of the heat transfer surface 11. The heat is further directly guided to the reforming chamber 21 through the reformer 20, thereby providing the required heat for the reforming of the fuel in the reformer 20 through the catalyst, thereby realizing the reforming of the fuel. Through the above settings of the reforming system, while ensuring uniform temperature distribution, the heat transfer efficiency between the reformer 20 and the burner 10 can be effectively improved, thereby realizing efficient utilization of the heat of the burner 10 and efficient reforming of the fuel, and at the same time, the heat can be evenly distributed to the reforming chamber 21, thereby improving the reforming quality of the fuel.

[0037] It can be understood that the burner 10 can be any combustion device that can burn fuel, and it can burn in the form of open flame combustion, catalytic combustion, etc.

[0038] It can be understood that the reformer 20 can be any reforming device that can perform catalytic reforming using a catalyst in a high temperature environment.

[0039] In one embodiment, Figure 3~4As shown, the burner 10 includes a combustion shell 12, a gas distribution member 13, a gas pipe 14 and an air pipe 15. The gas distribution member 13 is installed inside the combustion shell 12 and divides the combustion shell 12 into a combustion chamber 121 and a fuel chamber 122. The gas distribution member 13 is provided with a plurality of gas distribution holes 131. The gas pipe 14 is communicated with the fuel chamber 122. The air pipe 15 is connected to the gas distribution member 13 and communicated with the combustion chamber 121. Specifically, during the combustion of the fuel, the air is guided to the gas distribution member 13 through the air pipe 15 and directly enters the combustion chamber 121. The gas pipe 14 enters the fuel chamber 122 through the gas pipe 14, and then enters the combustion chamber 121 through the gas distribution hole 131 of the gas distribution member 13, contacts the catalyst in the combustion chamber 121 and performs catalytic combustion under the assistance of oxygen, thereby supplying heat to the reforming chamber 21 of the reformer 20.

[0040] In this embodiment, the combustion chamber 121 is provided with a combustion catalyst, and the fuel can be catalytically combusted in the combustion chamber 121 through the combustion catalyst.

[0041] In one embodiment, Figure 3~4 As shown, the gas distribution member 13 is conical, and the inner diameter of each gas distribution hole 131 gradually increases from the inside to the outside. Specifically, through the above arrangement of the gas distribution holes 131, the amount of gas entering the combustion chamber 121 can be gradually increased from the inside to the outside, thereby ensuring the sufficiency of the outer fuel, accelerating the combustion rate of the outer fuel, and increasing the temperature of the heat transfer surface 11, thereby improving the heat transfer efficiency of the reformer 20 and the burner 10.

[0042] In one embodiment, Figures 1 to 3 As shown, the reformer 20 includes an annular shell 22, an air intake module 23 and an exhaust module 24. The reforming chamber 21 is arranged inside the shell. The annular shell 22 is also provided with an air intake chamber 221 and an exhaust chamber 222. The air intake chamber 221 and the exhaust chamber 222 are respectively located at both ends of the reforming chamber 21 and communicate with the reforming chamber 21. The air intake module 23 and the exhaust module 24 are respectively communicated with the air intake chamber 221 and the exhaust chamber 222. Specifically, during the reforming operation of the reformer 20, the air intake module 23 introduces the fuel required for reforming into the air intake chamber 221. The fuel enters the reforming chamber 21 through the air intake chamber 221, contacts with the catalyst of the reforming chamber 21, and reforms the fuel under the heat of the burner 10. The reformed tail gas enters the exhaust chamber 222 and is finally discharged by the exhaust module 24.

[0043] In one embodiment, Figures 1 to 3As shown, the air intake module 23 includes a first annular tube 231 and a plurality of air intake pipes 232. The first annular tube 231 is located on the upper side of the air intake cavity 221. The air intake pipes 232 are arranged at intervals along the circumferential direction of the first annular tube 231. The two ends of the air intake pipes 232 are respectively connected with the first annular tube 231 and the air intake cavity 221. Specifically, during the fuel reforming process, after the fuel enters the first annular tube 231, it will be evenly distributed to the air intake pipes 232, and finally enter the air intake cavity 221 through the air intake pipes 232. Through the above arrangement of the air intake module 23, the fuel required for reforming can be evenly distributed to the air intake cavity 221, thereby achieving uniform heating and reforming of the fuel and improving the reforming quality of the fuel.

[0044] In one embodiment, Figures 1 to 3 As shown, the reformer 20 also includes a fuel mixing module 25, which includes a steam pipe 251, a fuel pipe 252 and a static mixer 253. The static mixer 253 is connected to the air intake module 23. The steam pipe 251 and the fuel pipe 252 are both connected to the static mixer 253. The steam pipe 251 is used to pass high-temperature steam, and the fuel pipe 252 is used to pass reforming fuel. Specifically, the fuel required for reforming is a mixture of fuel and steam. Through the setting of the fuel mixing module 25, the steam and fuel passed into the air intake module 23 are fully mixed by the static mixer 253 and then passed into the air intake module 23 for use in reforming, thereby achieving full mixing of the fuel and steam, thereby improving the reforming quality of the fuel.

[0045] In one embodiment, Figure 3 As shown, the air inlet end of the steam pipe 251 extends into the reforming chamber 21 and is coiled around the side wall of the reforming chamber 21, and the air outlet end of the steam pipe 251 extends out of the reforming chamber 21 and is connected to the static mixer 253. Specifically, by the multi-layer annular arrangement of the steam pipe 251 surrounding the reforming chamber, the heat of the high-temperature steam of the steam pipe 251 can be evenly transferred to the catalyst bed of the reforming chamber 21 through further uniform contact with the catalyst, thereby reducing the temperature gradient of the bed and facilitating the reforming of steam and fuel.

[0046] In one embodiment, Figures 1 to 3 As shown, the exhaust module 24 includes a second annular tube 241 and a plurality of exhaust pipes 242. The second annular tube 241 is located at the lower side of the exhaust cavity 222. The exhaust pipes 242 are arranged at intervals along the circumferential direction of the second annular tube 241. The two ends of each exhaust pipe 242 are respectively connected with the second annular tube 241 and the exhaust cavity 222. Specifically, each exhaust pipe 242 can quickly receive the exhaust gas after fuel reforming. The exhaust gas of the exhaust pipe 242 will enter the second annular tube 241 and be quickly discharged by the second annular tube 241 to avoid the exhaust gas from being retained in the exhaust cavity 222.

[0047] In one embodiment, Figure 3 As shown, an air intake partition plate 211 is disposed inside the annular housing 22, and an air intake chamber 221 and a reforming chamber 21 are respectively located on both sides of the air intake partition plate 211, and the air intake partition plate 211 is provided with a plurality of evenly distributed air intake distribution holes 2111. Specifically, the air intake partition plate 211 can partition the air intake chamber 221 and the reforming chamber 21, and the air intake distribution holes 2111 can evenly distribute the fuel into the reforming chamber 21, thereby facilitating the reforming of the fuel.

[0048] In one embodiment, Figure 3 As shown, an exhaust partition plate 212 is further provided inside the annular housing 22, and the exhaust chamber 222 and the reforming chamber 21 are respectively located on both sides of the exhaust partition plate 212, and the exhaust partition plate 212 is provided with a plurality of evenly distributed exhaust gas outlet holes 2121. Specifically, the exhaust partition plate 212 can separate the exhaust chamber 222 and the reforming chamber 21, and the exhaust gas outlet holes 2121 can quickly guide the reformed exhaust gas from the reforming chamber 21 to the exhaust chamber 222, thereby facilitating the exhaust gas discharge.

[0049] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A fuel cell reforming system, characterized in that: include: A burner is used for fuel combustion and has a heat transfer surface disposed on its surface, wherein the heat transfer surface is located on the periphery of the burner; A reformer, enclosing the burner and in contact with the heat transfer surface, having a reforming chamber built therein, the reforming chamber being arranged along the circumference of the heat transfer surface and being used to fill a catalyst and reform the fuel; The reformer comprises an annular shell, an air intake module and an exhaust module, the reforming chamber is arranged inside the shell, the annular shell is also provided with an air intake chamber and an exhaust chamber, the air intake chamber and the exhaust chamber are respectively located at two ends of the reforming chamber and communicated with the reforming chamber, the air intake module and the exhaust module are respectively communicated with the air intake chamber and the exhaust chamber; The air intake module comprises a first annular tube and a plurality of air intake pipes, wherein the first annular tube is located on the upper side of the air intake cavity, the air intake pipes are arranged at intervals along the circumferential direction of the first annular tube, and the two ends of the air intake pipes are respectively connected to the first annular tube and the air intake cavity; The burner comprises a combustion shell, an air distribution component, a fuel pipe and an air pipe, wherein the air distribution component is installed inside the combustion shell and separates the combustion shell into a combustion chamber and a fuel chamber, the air distribution component is provided with a plurality of air distribution holes, the fuel pipe is communicated with the fuel chamber, and the air pipe is connected to the air distribution component and communicated with the combustion chamber; The gas distribution part is conical, and the cone is gradually tapered from top to bottom. The inner diameter of each gas distribution hole gradually increases from inside to outside, and the area of ​​the gas distribution hole accounts for the area of ​​the gas distribution part which gradually increases from inside to outside; the reformer also includes a fuel mixing module, and the fuel mixing module includes a steam pipe, a fuel pipe and a static mixer. The static mixer is connected to the air intake module, and the steam pipe and the fuel pipe are both connected to the static mixer. The steam pipe is used to pass steam, and the fuel pipe is used to pass reforming fuel. The air intake end of the steam pipe extends into the reforming chamber and is coiled around the side wall of the reforming chamber, and the air outlet end of the steam pipe extends out of the reforming chamber and is connected to the static mixer.

2. The fuel cell reforming system according to claim 1, characterized in that: The exhaust module includes a second annular tube and a plurality of exhaust pipes, wherein the second annular tube is located at the lower side of the exhaust cavity, and the exhaust pipes are arranged at intervals along the circumferential direction of the second annular tube, and the two ends of the exhaust pipes are respectively connected to the second annular tube and the exhaust cavity.

3. The fuel cell reforming system according to claim 1, characterized in that: An air intake partition is arranged inside the annular shell, the air intake chamber and the reforming chamber are respectively located on both sides of the air intake partition, and the air intake partition is provided with a plurality of evenly distributed air intake distribution holes.

4. The fuel cell reforming system according to claim 1, characterized in that: An exhaust partition plate is also provided inside the annular shell, the exhaust chamber and the reforming chamber are respectively located on both sides of the exhaust partition plate, and the exhaust partition plate is provided with a plurality of evenly distributed exhaust gas outlet holes.

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