Composite hydrocarbon fuel reforming reactor

Abstract

The utility model belongs to the technical field of hydrocarbon fuel reforming, and particularly relates to a composite hydrocarbon fuel reforming reactor. Comprising a shell, a first end cover and a second end cover are oppositely arranged on the shell, an assembly for reforming reaction is arranged between the first end cover and the second end cover, a reformed gas inlet is formed in the first end cover, and a reformed gas outlet is formed in the second end cover; the reforming reaction assembly comprises a plurality of mutually independent catalytic reforming units, a cavity between the shell and the catalytic reforming units is used for carrying out catalytic combustion reaction, and a heat supply gas inlet and a heat supply gas outlet are formed in the side wall of the shell; the catalytic reforming unit comprises pipe bodies, a first gap is formed between every two adjacent pipe bodies, and the length L2 of each first gap is larger than or equal to 0.5 mm and smaller than or equal to 5 mm; a catalytic combustion catalyst is arranged on the outer wall of the pipe body; and heat generated by the catalytic combustion reaction is transferred to the reforming reaction chamber through the pipe wall of the pipe body and is provided for the reforming reaction.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of carbon hydrogen fuel reforming technology, especially relates to a composite carbon hydrogen fuel reforming reactor. BACKGROUND

[0002] Solid oxide fuel cell (SOFC) is a new power generation technology which converts chemical energy of fuel into electric energy by electrochemical reaction, and its working temperature is between 650 DEG C and 800 DEG C; solid oxide fuel cell can directly use synthesis gas (containing H2, CO, CO2, H2O, C x H y Etc.) after reforming of carbon hydrogen fuel as fuel to generate electricity.

[0003] Carbon hydrogen fuel generally refers to gasoline, diesel, kerosene, methanol, methane and the like, and reforming methods are generally divided into steam reforming, partial oxidation reforming and autothermal reforming. Steam reforming uses steam as oxidant, has the advantages of less carbon deposition, high reforming efficiency and high hydrogen production rate, and is widely used at present; but a large amount of heat needs to be absorbed in the whole reaction process, and heat needs to be continuously provided to maintain efficient reforming reaction. In the prior art, heat supply in the reforming reaction process is transferred by heat conducting oil or directly exchanged by co-wall surface. In industrial application, the reactor is mainly packaged with granular reforming catalyst, and there are problems of large volume and poor uniformity of catalyst bed temperature; in small system application, micro-channel reforming reactors are proposed one after another, such as Chinese patent (application number 201710567730.3), which coats catalyst on the flow channel plate and then assembles into a reactor, and has problems of great coating difficulty, high process cost and complex welding.

[0004] In the prior art, such as Chinese patent (application number 202010604726.1), a heat exchange type reforming reactor and a reforming hydrogen production system are proposed: the reaction part is filled with a catalyst carrier made of metal wire, and the surface of the metal wire is attached with a catalyst coating. After the heat supply medium enters the reaction cavity, it exchanges heat with the reforming reaction tube to supply heat for reforming; the heat supply medium does not generate secondary heat after entering the reaction cavity. Chinese patent (application number 202410149108.0) proposes a spiral column pipe type methanol reforming hydrogen production device and its operation method, which directly uses methanol solution and anode tail gas of the electric pile as the combustion chamber supply source, and uses the hot air flow generated by the combustion chamber to exchange heat with the catalyst of the reforming chamber to supply heat for reforming. The reforming area and the combustion area are separated, the fuel gas is first oxidized and heated by combustion, and then enters the reforming area to exchange heat, provide the required heat for reforming and carry out reforming in the reforming reaction cavity. The reforming catalyst is mainly in the form of loaded particles, and the reforming reaction area and the oxidation heating area are independent of each other; the column pipe is for heat supply gas, and the outside of the column pipe is the reforming area.

[0005] In the prior art, the heating gas oxidation cavity and the reforming reaction cavity are separated from each other, and the reforming catalyst and the catalytic combustion catalyst are independent of each other, which is not suitable for the reforming reactor with high power reforming demand. Practical new type content

[0006] The utility model discloses a composite hydrocarbon fuel reforming reactor.

[0007] In order to realize the above-mentioned purpose, the utility model adopts the technical scheme that:

[0008] A composite hydrocarbon fuel reforming reactor, comprising a shell, the shell is oppositely provided with a first end cover and a second end cover, a component for reforming reaction is arranged between the first end cover and the second end cover, a reforming gas inlet is arranged on the first end cover, and the second end cover is provided with a reforming gas outlet.

[0009] The component for reforming reaction comprises a plurality of independent catalytic reforming units, a cavity between the shell and the catalytic reforming unit is used for catalytic combustion reaction, and a heating gas inlet and a heating gas outlet are arranged on the side wall of the shell.

[0010] The catalytic reforming unit comprises a pipe body, a first gap is arranged between adjacent pipe bodies, the length of the first gap is L2: 0.5 mm≤L2≤5 mm, a catalytic combustion catalyst is arranged on the outer wall of the pipe body, and the heat generated by the catalytic combustion reaction is transmitted to the reforming reaction cavity through the pipe wall of the pipe body and provides heat for the reforming reaction.

[0011] In the technical scheme of the utility model, the cavity for catalytic combustion reaction and the pipe body cavity for reforming reaction are integrated in one shell, the heat generated by the combustion reaction is transmitted to the first cavity through the pipe wall, and the heat required by the reforming reaction is provided. x H y, O2, and the fuel and oxygen mixture. By setting a catalytic combustion catalyst on the outer wall of the pipe body, the oxidation reaction occurs on the catalytic combustion catalyst after the heating gas enters the shell, and the chemical energy of the heating gas is converted into heat energy to provide the reforming reaction cavity. The utility model discloses a structure optimization of the heating gas oxidation cavity and the reforming reaction cavity, and the heating gas oxidation cavity and the reforming reaction cavity are integrated to form a composite reforming reactor. The reactor can also be matched with a solid oxide fuel cell, and the tail gas of the anode and the cathode of the battery is mixed and then enters the reactor through the heating gas inlet, so that the solid oxide fuel cell tail gas is fully oxidized, the CO emission is reduced, and the energy use efficiency of the fuel is improved.

[0012] As a preferred scheme of the utility model, each pipe body inner cavity is provided with honeycomb metal fins, and the honeycomb metal fins are coated with a reforming catalyst. The catalytic reforming unit is the main place where the reforming reaction occurs.

[0013] As a preferred scheme of the utility model, the cross-sectional shape of the pipe body includes at least one of a circle, a rectangle or an ellipse. The cross-sectional shape of the pipe body can be determined according to the cross-sectional shape of the shell. When the cross section of the shell of the reforming reactor is circular, the internal pipe body can be provided as a circular pipe, or a combination of a circular pipe and an elliptical pipe. When the cross section of the shell of the reforming reactor is rectangular, the cross-sectional shape of the internal pipe body can be square or rectangular, or a combination of the two.

[0014] As a preferred scheme of the utility model, the cross section of the pipe body includes a circle and an ellipse, and the space in the shell that is insufficient to set a circular cross-section pipe body is supplemented by an elliptical cross-section pipe body. The integrated catalytic unit is mainly arranged in the shell with a circular cross-section pipe body. When the circular cross-section pipe body cannot be arranged near the inner wall region of the shell, the elliptical cross-section pipe body is supplemented.

[0015] Preferably, the diameter of the circular cross-section pipe body ranges from 10 to 100 mm, and the ratio of the shell to the pipe diameter of the pipe body ranges from 4 to 10. The reforming gas and the heating gas have sufficient reaction sites and strengthen the heat transfer in the reaction process.

[0016] Each outer wall of the pipe body is coated with a catalytic combustion catalyst, which is the main place where the catalytic combustion reaction occurs. The catalytic combustion catalyst is distributed on the outer wall surface of the integrated catalytic unit, and can be coated in segments and with different loads according to actual conditions to realize controllable partitioning of the oxidation reaction.

[0017] As the preferred scheme of the utility model, the reforming reaction's component includes two oppositely arranged baffle plates, one baffle plate is arranged close to the first end cover, and the other baffle plate is arranged close to the second end cover, and the two ends of each pipe body are fixedly connected with the baffle plates respectively. A plurality of through holes are arranged on the baffle plate, the inner diameter of the through hole matches the inner diameter of the pipe body, and the pipe body is weldedly connected with the outer edge of the through hole. The thickness of the baffle plate is 0.5 mm-5 mm.

[0018] Preferably, the reforming reaction component includes two oppositely arranged flow distribution plates, one of the flow distribution plates is arranged close to the first end cover, and the other flow distribution plate is arranged close to the second end cover, the thickness of the flow distribution plate is 0.5 mm-2 mm, a plurality of air holes for gas flow are arranged on the flow distribution plate, and the horizontal distance between the baffle plate and the flow distribution plate is L1, L1≥5 mm.

[0019] Preferably, the heat supply gas inlet is close to the side of the second end cover, and the heat supply gas outlet is close to the side of the first end cover. Further preferably, the heat supply gas inlet is arranged at the bottom of the shell, and the heat supply gas outlet is arranged at the top of the shell. In the technical scheme of the utility model, the catalytic combustion catalyst is arranged in combination with different positions, the heat supply gas and the reforming endothermic gas flow in opposite directions, the heat of the heat supply gas is used in stages, and the energy utilization efficiency is improved.

[0020] Preferably, the monitoring component further includes temperature monitoring and pressure monitoring, and the monitoring component is arranged at the gas inlet and gas outlet positions of the reactor respectively.

[0021] Preferably, the heat supply gas inlet is further provided with a tail gas circulation pipeline, and the tail gas discharged through the anode and / or cathode in the solid oxide fuel cell system enters the shell through the tail gas circulation pipeline to perform a catalytic combustion reaction.

[0022] Further preferably, the mixed anode tail gas (heat supply fuel gas) and cathode tail gas (oxidant / fresh air) of the electric pile enter, and a catalytic combustion unit with a catalytic combustion coating layer can be arranged at the inlet, and the catalytic combustion unit is used for preliminary oxidation of the heat supply gas.

[0023] In summary, due to the adoption of the above technical scheme, the utility model has the beneficial effects that:

[0024] The utility model discloses a technical scheme, provide a kind of composite hydrocarbon fuel reforming reactor, metal honeycomb carrier is used as reforming reactor, with easy to apply, easy to realize fast production, manufacturing process cost low etc., the utility model simultaneously integrated catalytic combustion reaction place, by catalytic combustion catalyst on the outer wall surface of metal honeycomb carrier, heat exchanger and catalytic reactor coupling are realized, compactness of structure is improved.

[0025] In the technical scheme of the utility model, the catalytic combustion reaction chamber and the pipe body inner cavity for carrying out reforming reaction are integrated in one shell, the heat generated by the combustion reaction is transferred to the first inner cavity through the pipe wall, and the heat required for the reforming reaction is provided. The heat supply gas is a mixed gas containing H2, CO, C x H y , O2 and oxygen. By arranging the catalytic combustion catalyst on the outer wall of the pipe body, the oxidation reaction occurs on the catalytic combustion catalyst after the heat supply gas enters the shell, and the chemical energy of the heat supply gas is converted into heat energy to provide the reforming reaction chamber.

[0026] The utility model optimizes the structure of the heat supply gas oxidation cavity and the reforming reaction cavity, integrates them together to form a composite reforming reactor. The reactor can also be combined with a solid oxide fuel cell, and the exhaust gas of the anode and the cathode of the battery is mixed and then enters the reactor through the heat supply gas inlet, so that the solid oxide fuel cell exhaust gas is fully oxidized, the CO emission is reduced, and the energy use efficiency of the fuel is improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is the longitudinal section structure schematic diagram of the utility model.

[0028] Figure 2 It is the structure schematic diagram of the integrated catalytic unit of the utility model after assembly.

[0029] Figure 3 It is the structure schematic diagram of the gas passage of the heat supply gas of the utility model;

[0030] Figure 4 It is the structure schematic diagram of the partition plate of the utility model;

[0031] Figure 5 It is Figure 4 A-A section view schematic diagram of;

[0032] Figure 6 It is the section view of the catalytic reforming unit of the utility model;

[0033] Figure 7 It is the structure schematic diagram of the flow equalizing plate of the utility model.

[0034] Icon: 1 - housing, 11 - first end cover, 12 - second end cover, 2 - reforming gas inlet, 3 - reforming gas outlet, 4 - heat supply gas inlet, 5 - heat supply gas outlet, 6 - tube body, 61 - honeycomb metal fin, 62 - reforming catalyst, 7 - first gap, 8 - catalytic combustion catalyst, 9 - partition plate, 91 - through hole, 10 - flow distribution plate, 101 - vent hole, 13 - inlet sensor seat, 14 - outlet sensor seat. DETAILED DESCRIPTION

[0035] In order to more clearly describe the invention purposes, technical solutions and technical effect advantages in the specific implementation cases of the utility model, the following will make a detailed description of the solutions in the specific embodiments in combination with the drawings of the specification of the utility model. The specific technical solutions involved in the following specific embodiments are only for clearly and completely describing the innovative technical solutions of the utility model, and they are only a part of the specific implementation solutions that can be adopted by the utility model, not all the embodiments, and should not be understood as the limitation of the innovative solutions of the utility model. Any solution adopting the same invention concept of the utility model should be included in the protection scope of the utility model.

[0036] Secondly, the related description of the drawings in the specific embodiments of the utility model is only for facilitating the technical personnel to understand the solutions of the utility model, and the partial detail display in the drawings is for facilitating the clear presentation of the technical solutions, and should not be considered that all the technical features in the drawings must be included in the specific implementation cases, and more cannot be considered as the additional limitation of the innovative technical solutions of the utility model. The components in each embodiment described and exhibited in the drawings can be combined and arranged in different configurations, and these combination and arrangement changes should be considered as a part of all the embodiments of the innovative solutions of the utility model, and be included in the protection scope of the utility model.

[0037] In summary, the solutions or descriptions presented in the specific embodiments and the drawings of the utility model are not intended to limit the protection scope, but only to represent the selected embodiments / cases for helping the technical personnel to understand the related innovative solutions. Based on these embodiments, all the other equivalent or parallel embodiments obtained by the technical personnel in the art without making creative efforts belong to the protection scope of the utility model.

[0038] It should be noted that, in the description of the embodiments of the present application, the terms of orientation or position relationship such as "upper", "lower", "left", "right", "center", "inner", "outer" and the like are based on the orientation or position relationship shown in the drawings, or the orientation or position relationship when the product / device / apparatus is normally used. These terms of orientation or position relationship are only for the convenience of describing the present application or simplifying the description of the embodiments, and for the convenience of the skilled person to quickly understand the scheme, and do not indicate or imply that a specific device / component / element must have a specific orientation or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation of the present application.

[0039] In addition, the terms "horizontal", "vertical", "suspended" and the like do not mean that the corresponding device / component / element must be absolutely horizontal or vertical or suspended, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined. Alternatively, it can be simplified to understand that the corresponding device / component / element is set in a specific direction such as "horizontal", "vertical", "suspended" and the like, and can have an error / bias of ±10% relative to the corresponding direction, more preferably an error / bias of ±8% or less, more preferably an error / bias of ±6% or less, more preferably an error / bias of ±5% or less, and more preferably an error / bias of ±4% or less. As long as the corresponding device / component / element is within the error / bias range, it can still achieve its role in the present application scheme.

[0040] In addition, the terms "first", "second", "third" and the like in the description of the embodiments of the present application are only used to distinguish the same or similar components, and should not be understood as emphasizing or implying the relative importance of the specific components.

[0041] In addition, in the description of the embodiments of the present application, "several", "a plurality of", "several" represent at least 2. It can be 3, 4, 5, 6, 7, 8, 9, etc. in any case, and even more than 9.

[0042] In addition, in the description of the technical scheme of the present application, unless otherwise specified / limited / limited, the terms "set", "install", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, which can be welding, riveting, bolting, screwing and other commonly used connection means in the art. The connection can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements.

[0043] For those skilled in the art, when understanding the solutions described in the specific embodiments of this utility model, conventional technical manuals in the field can be consulted. At the same time, appropriate understandings or adjustments can be made to the places where the above terms appear, so as to deduce the same or similar technical solutions without creative effort.

[0044] The above embodiments describe only the basic principles, main features and / or advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and the invention content section of the specification describe only the principles or specific cases of this utility model. Without departing from the essence of the innovative idea of ​​this utility model, there are various changes and improvements to the innovative solution of this utility model, and these changes and improvements all fall within the scope of protection claimed by this utility model.

[0045] The present invention will now be described in detail with reference to the accompanying drawings.

[0046] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0047] Example 1

[0048] This embodiment provides a composite hydrocarbon fuel reforming reactor, such as Figures 1-7 As shown, the device includes a cylindrical housing 1. A first end cap 11 and a second end cap 12 are disposed opposite each other on the housing 1. Both the first end cap 11 and the second end cap 12 are frustoconical in shape. A reforming gas inlet 2 is provided on the first end cap 11, and a reforming gas outlet 3 is provided on the second end cap 12. An assembly for the reforming reaction is disposed between the first end cap 11 and the second end cap 12.

[0049] A plurality of independent tubes 6 are disposed between the first end cap 11 and the second end cap 12, and the inner cavity of the plurality of tubes 6 is a reforming reaction chamber. The gas to be reformed enters through the reforming gas inlet 2 and undergoes a reforming reaction in the reforming reaction chamber. The reformed syngas flows out through the reforming gas outlet 3 and enters the anode of the solid oxide fuel cell system as a reaction fuel to participate in the power generation reaction. The gas to be reformed can be a pre-mixed mixture of hydrocarbon fuel and water vapor, or hydrocarbon fuel and water vapor can enter separately for reforming.

[0050] The reforming reaction assembly comprises several independent catalytic reforming units, the cavity between the shell 1 and the catalytic reforming units is used for carrying out catalytic combustion reaction, the shell 1 side wall is provided with a hot gas inlet 4 and a hot gas outlet 5; the hot gas inlet 4 is close to the second end cover side, the hot gas inlet 4 is arranged at the bottom of the shell 1, the hot gas outlet 5 is close to the first end cover side, and the hot gas outlet 5 is arranged at the top of the shell 1. In this embodiment, the catalytic combustion catalyst 8 is arranged in different positions, the hot gas and the reforming endothermic gas flow in opposite directions, the heat of the hot gas is used in stages, and the energy utilization efficiency is improved.

[0051] The catalytic reforming unit comprises a pipe body 6, and a first gap 7 is arranged between adjacent pipe bodies 6, as shown in the figure, the length of the first gap 7 is L2: 0.5 mm≤L2≤5 mm; the outer wall of the pipe body 6 is provided with a catalytic combustion catalyst 8; the heat generated by the catalytic combustion reaction is transmitted to the reforming reaction cavity through the pipe wall of the pipe body 6 and provides heat for the reforming reaction. Figure 3

[0052] Each inner cavity of the pipe body 6 is provided with a honeycomb metal fin 61 coated with a reforming catalyst 62. Each pipe body 6 is an integrated catalytic unit, which is the main place for the reforming reaction to occur. The cross-sectional shape of the pipe body 6 can be any one or any two of a circle, a rectangle and an ellipse. In this embodiment, the cross-sectional shape of the pipe body 6 can be determined according to the cross-sectional shape of the shell 1, and the cross-sectional shape of the shell 1 is a circle, and the pipe body 6 inside can be a circular pipe or a combination of a circular pipe and an elliptical pipe. The diameter of the pipe body 6 with a circular cross-section ranges from 10 to 100 mm, which facilitates heat transfer during the reaction process.

[0053] The reforming reaction assembly comprises two oppositely arranged baffles 9, as shown in the figure, one baffle 9 is arranged close to the first end cover 11, and the other baffle 9 is arranged close to the second end cover 12, and the two ends of each pipe body 6 are fixedly connected with the baffles 9 respectively. Figure 4

[0054] The several pipe bodies 6 are arranged in the shell 1 as follows: as shown in the figure, the structure diagram of the baffle, the hole position on the baffle corresponds to the pipe opening position of the pipe body. Figure 4 Figure 6 ​​​As shown, the outer wall of each of the pipe bodies 6 is coated with a catalytic combustion catalyst 8, which is the main place for the catalytic combustion reaction to occur. The distribution of the catalytic combustion catalyst 8 on the outer wall surface of the integrated catalytic unit can be coated according to actual needs in segments and with different loadings to achieve controllable partitioning of the oxidation reaction.

[0055] The reforming reaction assembly includes two oppositely arranged flow distribution plates 10, one of which is arranged close to the first end cover 11, and the other of which is arranged close to the second end cover 12. The thickness of the flow distribution plate 10 is 0.5-2 mm, and the flow distribution plate 10 is provided with a plurality of air holes 101 for gas flow. The horizontal distance between the baffle 9 and the flow distribution plate 10 is L1, and L1≥5 mm.

[0056] The reactor further includes a monitoring assembly, which includes temperature monitoring and pressure monitoring, and the monitoring assembly is arranged at the gas inlet and gas outlet positions of the reactor, respectively. Specifically, the reforming gas inlet and outlet and the heat supply gas inlet and outlet are each provided with a sensor base for integrating a temperature sensor or a pressure sensor as needed. As shown in Figure 1 The first end cover is provided with an inlet sensor seat 13, and the second end cover is provided with an outlet sensor seat 14. Similarly, the heat supply gas inlet and outlet positions can also be provided with sensor seats for mounting sensors.

[0057] In a more preferred technical solution, the heat supply gas inlet 4 is further provided with a tail gas circulation pipeline, through which the tail gas discharged from the anode and / or cathode of the solid oxide fuel cell system enters the housing 1 for catalytic combustion reaction.

[0058] In a further preferred technical solution, the mixture of the anode tail gas (heat supply fuel gas) and the cathode tail gas (oxidant / fresh air) enters, and a catalytic combustion unit with a catalytic combustion coating can be optionally arranged at the inlet, which is used for preliminary oxidation of the heat supply gas.

[0059] Working principle:

[0060] The reforming gas enters the composite hydrocarbon fuel reforming reactor from the reforming gas inlet 2. The reforming gas can be a mixed gas of hydrocarbon fuel and steam, or the hydrocarbon fuel and steam can enter separately.

[0061] Under the action of the flow distribution plate 10, the uniformly distributed reforming gas enters the reforming reaction chamber to undergo steam reforming reaction. The reformed synthesis gas (containing H2, CO, CO2, H2O, CH4, etc.) flows out from the reforming gas outlet 3 and enters the anode of the solid oxide fuel cell system to participate in the power generation reaction as a reaction fuel. x H y The reformed synthesis gas (containing H2, CO, CO2, H2O, CH4, etc.) flows out from the reforming gas outlet 3 and enters the anode of the solid oxide fuel cell system to participate in the power generation reaction as a reaction fuel.

[0062] The exhaust gas discharged from the anode and the cathode in the solid oxide fuel cell system is mixed from the heating gas inlet 4 and enters, flows along the catalytic combustion reaction chamber, and contacts the catalytic combustion catalyst 8 in the flow, further occurs oxidation reaction, releases heat energy to improve the temperature of the mixed gas, and is transmitted to the reforming reaction chamber in real time to provide heat for the steam reforming reaction.

[0063] The above merely describes the preferred embodiment of the present application, and is not intended to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A composite hydrocarbon fuel reforming reactor, characterized by, The application relates to a reforming device, which comprises a shell (1), a first end cover (11) and a second end cover (12) oppositely arranged on the shell (1), a reforming reaction assembly arranged between the first end cover (11) and the second end cover (12), a reforming gas inlet (2) arranged on the first end cover (11), and a reforming gas outlet (3) arranged on the second end cover (12); the reforming reaction assembly comprises a plurality of mutually independent catalytic reforming units, a cavity between the shell (1) and the catalytic reforming units is used for carrying out a catalytic combustion reaction, a hot gas inlet (4) and a hot gas outlet (5) are arranged on the side wall of the shell (1); the catalytic reforming unit comprises a pipe body (6), first gaps (7) are arranged between adjacent pipe bodies (6), the length of the first gaps (7) is L2: 0.5 mm<=L2<=5 mm, a catalytic combustion catalyst (8) is arranged on the outer wall of the pipe body (6); heat generated by the catalytic combustion reaction is transmitted to a reforming reaction chamber through the pipe wall of the pipe body (6) and provides heat for the reforming reaction.

2. The composite hydrocarbon fuel reforming reactor according to claim 1, wherein Honeycomb metal fins (61) are arranged in the inner cavity of each pipe body (6), and the honeycomb metal fins (61) are coated with a reforming catalyst (62).

3. The composite hydrocarbon fuel reforming reactor according to claim 2, wherein The cross-sectional shape of the pipe body (6) comprises at least one of a circular shape, a rectangular shape or an elliptical shape.

4. The composite hydrocarbon fuel reforming reactor according to claim 3, wherein The cross section of the pipe body (6) comprises a circular shape and an elliptical shape, and the space in the shell (1) which is insufficient for arranging the circular cross-section pipe body (6) is supplemented by the elliptical cross-section pipe body (6).

5. The composite hydrocarbon fuel reforming reactor according to claim 3, wherein The diameter of the pipe body (6) with the circular cross section ranges from 10 mm to 100 mm, and the ratio of the pipe diameter of the shell (1) to the pipe body (6) ranges from 4 to 10.

6. The composite hydrocarbon fuel reforming reactor according to claim 1, wherein The reforming reaction assembly comprises two oppositely arranged baffles (9), one baffle (9) is arranged close to the first end cover (11), the other baffle (9) is arranged close to the second end cover (12), two ends of each pipe body (6) are fixedly connected with the baffles (9) respectively, a plurality of through holes (91) are arranged on the baffle (9), the inner diameter of the through hole (91) matches the inner diameter of the pipe body (6), and the pipe body (6) and the outer edge of the through hole (91) are weldedly connected.

7. The composite hydrocarbon fuel reforming reactor according to claim 6, wherein The reforming reaction assembly comprises two oppositely arranged flow uniformizing plates (10), one flow uniformizing plate (10) is arranged close to the first end cover (11), the other flow uniformizing plate (10) is arranged close to the second end cover (12), the thickness of the flow uniformizing plate (10) is 0.5-2 mm, a plurality of air holes (101) for gas flow are arranged on the flow uniformizing plate (10), and the horizontal distance between the baffle (9) and the flow uniformizing plate (10) is L1, L1>=5 mm.

8. The composite hydrocarbon fuel reforming reactor according to claim 1, wherein The hot gas inlet (4) is arranged on the side close to the second end cover (12), the hot gas inlet (4) is arranged at the bottom position of the shell (1), the hot gas outlet (5) is arranged on the side close to the first end cover (11), and the hot gas outlet (5) is arranged at the top position of the shell (1).

9. The composite hydrocarbon fuel reforming reactor according to claim 8, wherein Also included is a monitoring assembly including temperature monitoring and pressure monitoring, the monitoring assembly being provided at the gas inlet and gas outlet locations of the reactor, respectively.

10. The composite hydrocarbon fuel reforming reactor according to claim 1, wherein The heat supply gas inlet (4) is also provided with a tail gas circulation pipeline, through which tail gas discharged by the anode and / or cathode in the solid oxide fuel cell system enters the shell (1) to perform a catalytic combustion reaction.

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