A natural gas reforming microchannel reactor and method based on catalytic combustion

Abstract

The present invention relates to a natural gas reforming microchannel reactor based on catalytic combustion, comprising a catalytic combustion chamber, a reforming reaction chamber and a high-temperature flue gas chamber; the catalytic combustion chamber is mainly composed of a first catalytic combustion flow field plate and a second catalytic combustion flow field plate arranged symmetrically, a fluid mixing guide plate is arranged at the inlet of the catalytic combustion chamber flow field, the flow field inside the catalytic combustion flow field plate is a volute structure, baffles are arranged along the flow field direction, exhaust holes are arranged at the center positions of the first catalytic combustion flow field plate and the second catalytic combustion flow field plate, and a combustion catalyst is coated on the inner surface of the flow field. The beneficial effects of the present invention are: the reactor of the present invention is a columnar laminated structure with a middle layer catalytic combustion chamber as a whole, reforming reaction chambers and high-temperature flue gas chambers on both sides arranged symmetrically and staggered, a cover is arranged on the outermost side for distributing and collecting gas, and the device has a high degree of integration.

Description

Technical Field

[0001] The invention relates to a natural gas reforming reactor, and in particular to a natural gas reforming microchannel reactor and method based on catalytic combustion. Background Art

[0002] As a green, efficient and clean energy, hydrogen has a wide range of uses and will occupy an important position in my country's future energy system. my country has abundant reserves of natural gas resources. Hydrogen is produced by reforming natural gas and water vapor at high temperatures. The hydrogen production efficiency is high and it is well matched with high-temperature application scenarios of hydrogen (such as high-temperature fuel cells). At present, natural gas reforming reactors generally use direct combustion of natural gas to supply the heat required for reforming, such as the natural gas / methane reformer of Ningbo Institute of Materials and Ningbo Soforen Company. This method requires a large combustion space, which is not conducive to the miniaturization of devices; the uneven distribution of the combustion flame will lead to a large temperature difference on the wall, and the high temperature resistance (>1000℃) of the material is required to be high, and the reforming efficiency is affected. If catalytic combustion is used for heat supply, the above problems can be solved, but in order to ensure the activity of the catalyst, the catalytic combustion reaction temperature is relatively low, so the flame stability is not high. In view of this, it is necessary to propose a natural gas reforming reactor and method that can stabilize catalytic combustion. Summary of the invention

[0003] The object of the present invention is to overcome the deficiencies in the prior art and to provide a natural gas reforming microchannel reactor and method based on catalytic combustion.

[0004] The natural gas reforming microchannel reactor based on catalytic combustion includes a catalytic combustion chamber, a reforming reaction chamber and a high-temperature flue gas chamber;

[0005] The catalytic combustion chamber is mainly composed of a first catalytic combustion flow field plate and a second catalytic combustion flow field plate arranged symmetrically, a fluid mixing guide plate is arranged at the inlet of the catalytic combustion chamber flow field, the flow field inside the catalytic combustion flow field plate is a volute structure, a baffle is arranged along the flow field direction, an exhaust hole is arranged at the center of the first catalytic combustion flow field plate and the second catalytic combustion flow field plate, and a combustion catalyst is coated on the inner surface of the flow field;

[0006] The reforming reaction chamber is formed by symmetrically arranging the first reforming microchannel plate and the second reforming microchannel plate on both sides of the catalytic combustion chamber. Four air cavity partition plates perpendicular to the circumferential tangent are evenly arranged on the outer edges of the circumferences of the first reforming microchannel plate and the second reforming microchannel plate. Blunt bodies are arranged inside the flow field inside the reforming microchannel plate. Quarter arc cavity walls are arranged on both sides along the fluid flow direction. Vertical air holes not connected to the reforming flow field are arranged at the center positions of the first reforming microchannel plate and the second reforming microchannel plate. The inner surface of the flow field is coated with a reforming catalyst.

[0007] The high-temperature flue gas cavity is formed by arranging the first high-temperature flue gas microchannel plate and the second high-temperature flue gas microchannel plate on the outside of the reforming microchannel plate. Four air cavity partition plates perpendicular to the circumferential tangent are evenly arranged on the outer edges of the circumferences of the first high-temperature flue gas microchannel plate and the second high-temperature flue gas microchannel plate, and correspond to the air cavity partition plates of the reforming microchannel plate. Blunt bodies are arranged inside the flow field on the inner side of the warm flue gas microchannel plate. The arrangement direction of the blunt bodies of the warm flue gas microchannel plate is perpendicular to that of the reforming microchannel plate. 1 / 4 arc cavity walls are arranged on both sides along the fluid flow direction. The arc cavity walls of the high-temperature flue gas microchannel plate and the arc cavity walls of the reforming microchannel plate are staggered. The first high-temperature flue gas microchannel plate and the second high-temperature flue gas microchannel plate are provided with narrow grooves along the diameter direction to form a high-temperature flue gas distribution cavity.

[0008] An upper end cover and a lower end cover are arranged on the outside of the first high-temperature flue gas microchannel plate and the second high-temperature flue gas microchannel plate, respectively, and a cover shell is arranged on the outside of the lower end cover; the first natural gas inlet pipe, the second natural gas inlet pipe, the air inlet pipe, the water vapor inlet pipe, the flue gas exhaust outlet pipe and the reforming hydrogen outlet pipe are welded to the upper end cover.

[0009] Preferably, the fluid mixing guide plate is a plane guide plate or a spiral guide plate.

[0010] Preferably, the first catalytic combustion flow field plate is provided with pipelines corresponding to the first natural gas inlet pipe and the air inlet pipe.

[0011] Preferably, the first catalytic combustion flow field plate and the second catalytic combustion flow field plate are provided with a pipeline corresponding to the flue gas outlet pipe, a pipeline corresponding to the second natural gas inlet pipe and the water vapor inlet pipe, and a pipeline corresponding to the reformed hydrogen outlet pipe.

[0012] Preferably, partition plates are correspondingly arranged on the first catalytic combustion flow field plate and the second catalytic combustion flow field plate to form a catalytic combustion gas mixing chamber, and the fluid mixing guide plate is located in the catalytic combustion gas mixing chamber.

[0013] Preferably, the chambers corresponding to the outer sides of the arc cavity walls on both sides of the high-temperature flue gas microchannel plate are the reformed gas distribution chamber and the reformed gas collection chamber respectively.

[0014] As a preference, the chambers corresponding to the outer sides of the arc cavity walls on both sides of the reforming microchannel plate are the smoke collecting chamber A and the smoke collecting chamber B respectively.

[0015] As a preferred embodiment: the lower end cover has two holes corresponding to the smoke collecting chamber A and the smoke collecting chamber B, wherein the hole located below the smoke collecting chamber A corresponds to the smoke reflux pipe on the catalytic combustion flow field plate, and the hole located below the smoke collecting chamber B corresponds to the smoke exhaust gas outlet pipe.

[0016] Preferably, a gap is left between the cover shell and the lower end cover.

[0017] The working method of the natural gas reforming microchannel reactor based on catalytic combustion comprises the following steps:

[0018] S1, natural gas and air enter the inlet of the catalytic combustion chamber through the first natural gas inlet pipe and the air inlet pipe respectively, and then flow into the volute structure flow field of the catalytic combustion chamber after mixing in the catalytic combustion gas mixing chamber to perform catalytic combustion reaction;

[0019] S2. The high-temperature flue gas generated by the catalytic combustion reaction diffuses from the exhaust hole in the center of the catalytic combustion chamber to the upper and lower sides and enters the high-temperature flue gas distribution chamber, where the gas is distributed and then flows into the high-temperature flue gas chamber for heat exchange, and then is discharged into the flue gas collection chamber A and the flue gas collection chamber B, wherein the flue gas in the flue gas collection chamber A enters the bottom space of the housing through the flue gas reflux pipe, then goes up into the flue gas collection chamber B and merges with the flue gas in the flue gas collection chamber B and is discharged together from the flue gas exhaust outlet pipe;

[0020] S3. The natural gas and water vapor used for the reforming reaction enter the reforming gas distribution chamber through the second natural gas inlet pipe and the water vapor inlet pipe respectively, where the gases are mixed and distributed before flowing into the reforming reaction chamber, where they absorb the heat conducted from the high-temperature flue gas chamber and the catalytic combustion chamber to undergo a reforming reaction, and the generated gas is discharged into the reforming gas collection chamber and then discharged from the reforming hydrogen outlet pipe.

[0021] The beneficial effects of the present invention are:

[0022] 1. The reactor of the present invention is a columnar stacked structure with a catalytic combustion chamber in the middle layer, reforming reaction chambers and high-temperature flue gas chambers on both sides arranged symmetrically and staggeredly, and a cover shell is arranged on the outermost side for distributing and collecting gases, and the device has a high degree of integration.

[0023] 2. The catalytic combustion chamber of the present invention adopts a volute structure flow field, a fluid mixing guide plate is arranged at the flow field inlet, and a baffle is arranged inside the flow field to improve the reaction efficiency and ensure the stability of catalytic combustion.

[0024] 3. The reforming reaction chamber and high-temperature flue gas chamber of the present invention adopt a microchannel flow field, a blunt body is arranged inside the flow field, and four air cavity partition plates are arranged along the circumference of the periphery to separate different flow streams, and the reforming reaction chamber and the high-temperature flue gas chamber are staggered and stacked microchannel structures to ensure heat exchange performance and improve reforming efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural exploded diagram of a natural gas reforming microchannel reactor based on catalytic combustion;

[0026] Figure 2 This is the structural assembly diagram of the natural gas reforming microchannel reactor based on catalytic combustion.

[0027] Explanation of the accompanying drawings: first natural gas inlet pipe 1, air inlet pipe 2, second natural gas inlet pipe 3, water vapor inlet pipe 4, flue gas exhaust outlet pipe 5, reformed hydrogen outlet pipe 6, upper end cover 7, first high-temperature flue gas microchannel plate 8, first reforming microchannel plate 9, first catalytic combustion flow field plate 10, second catalytic combustion flow field plate 11, second reforming microchannel plate 12, second high-temperature flue gas microchannel plate 13, lower end cover 14, cover 15, flue gas reflux pipe 16, high-temperature flue gas distribution chamber 17, catalytic combustion gas mixing chamber 18, reforming gas distribution chamber 19, reforming gas collecting chamber 20, flue gas collecting chamber A 21, flue gas collecting chamber B 22. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with embodiments. The description of the following embodiments is only used to help understand the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principles of the present invention, several improvements and modifications may be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0029] Embodiment 1

[0030] The first embodiment of the present application provides a natural gas reforming microchannel reactor based on catalytic combustion. Since the catalytic combustion of natural gas in a microchannel will encounter problems such as short gas residence time, low combustion efficiency, and unstable combustion, the present invention adopts a volute structure flow field to concentrate the part with low fuel concentration in the center of the volute to ensure the stability of catalytic combustion; high-temperature flue gas and reforming reaction microchannel flow fields are symmetrically and staggered on both sides of the catalytic combustion chamber, the device has high integration, good heat exchange efficiency, and can ensure the reforming effect. Its structure includes three parts: catalytic combustion chamber, reforming reaction chamber, and high-temperature flue gas chamber.

[0031] The catalytic combustion chamber is mainly composed of a first catalytic combustion flow field plate 10 and a second catalytic combustion flow field plate 11 arranged symmetrically. A fluid mixing guide plate (either a flat guide plate or a spiral guide plate) is arranged at the flow field inlet of the catalytic combustion chamber. The flow field body is a volute structure (either an equal pitch or an unequal pitch volute structure), and baffles are arranged along the flow field direction. Exhaust holes are set at the center positions of the first catalytic combustion flow field plate 10 and the second catalytic combustion flow field plate 11, and a combustion catalyst is coated on the inner surface of the flow field.

[0032] The reforming reaction chamber is formed by symmetrically arranging the first reforming microchannel plate 9 and the second reforming microchannel plate 12 on both sides of the catalytic combustion chamber. Four air cavity partition plates perpendicular to the circumferential tangent are evenly arranged on the outer edge of the circumference of the first reforming microchannel plate 9 and the second reforming microchannel plate 12. Blunt bodies are arranged inside the flow field to strengthen the back mixing flow (the shape of the blunt bodies is not limited). 1 / 4 arc cavity walls are arranged on both sides along the fluid flow direction. The first reforming microchannel plate 9 and the second reforming microchannel plate 12 are provided with vertical air holes that are not connected to the reforming flow field at the center position, and the inner surface of the flow field is coated with a reforming catalyst.

[0033] The high-temperature flue gas cavity is formed by arranging the first high-temperature flue gas microchannel plate 8 and the second high-temperature flue gas microchannel plate 13 on the outside of the reforming microchannel plate. Four air cavity partition plates perpendicular to the circumferential tangent are evenly arranged on the outer edge of the circumference of the first high-temperature flue gas microchannel plate 8 and the second high-temperature flue gas microchannel plate 13, and correspond to the air cavity partition plates of the reforming microchannel plate. Blunt bodies are arranged inside the flow field to enhance the back mixing flow (the shape of the blunt bodies is not limited). The arrangement direction of the blunt bodies is perpendicular to the arrangement direction of the blunt bodies of the reforming microchannel plate. 1 / 4 arc cavity walls are arranged on both sides along the fluid flow direction. The arc cavity walls of the high-temperature flue gas microchannel plate and the arc cavity walls of the reforming microchannel plate are staggered (which play the role of separating the airflow and controlling the fluid outflow direction, so that the high-temperature flue gas and the reforming gas can only flow into the gas collection cavity from their respective gas distribution cavities without mixing). The first high-temperature flue gas microchannel plate 8 and the second high-temperature flue gas microchannel plate 13 have narrow grooves along the diameter direction to form a high-temperature flue gas distribution cavity 17.

[0034] The reforming microchannel plates and the high-temperature flue gas microchannel plates can be symmetrically arranged in multiple layers on both sides of the reforming reaction chamber as required (only two symmetrical layers are shown in the figure), and the upper end cover 7 and the lower end cover 14 are arranged on the outermost side, and the cover 15 is arranged on the outer side of the lower end cover 14. The upper end cover 7 is welded with gas inlet and outlet pipes, including a first natural gas inlet pipe 1, a second natural gas inlet pipe 3, an air inlet pipe 2, a water vapor inlet pipe 4, a flue gas outlet pipe 5, and a reforming hydrogen outlet pipe 6.

[0035] Embodiment 2

[0036] On the basis of Example 1, Example 2 of the present application provides a more specific natural gas reforming microchannel reactor based on catalytic combustion, and the specific structure is as follows:

[0037] The first catalytic combustion flow field plate 10 is provided with pipelines corresponding to the first natural gas inlet pipe 1 and the air inlet pipe 2, the first catalytic combustion flow field plate 10 and the second catalytic combustion flow field plate 11 are provided with pipelines corresponding to the flue gas and exhaust gas outlet pipe 5, the first catalytic combustion flow field plate 10 and the second catalytic combustion flow field plate 11 are provided with pipelines corresponding to the second natural gas inlet pipe 3 and the water vapor inlet pipe 4, and the first catalytic combustion flow field plate 10 and the second catalytic combustion flow field plate 11 are provided with pipelines corresponding to the reformed hydrogen outlet pipe 6. The first catalytic combustion flow field plate 10 and the second catalytic combustion flow field plate 11 are provided with partition plates corresponding to form a catalytic combustion gas mixing chamber 18, and the fluid mixing guide plate is located in the catalytic combustion gas mixing chamber 18. The corresponding chambers on the outside of the arc cavity wall on both sides of the high-temperature flue gas microchannel plate are the reformed gas distribution chamber 19 and the reformed gas collection chamber 20. The corresponding chambers on the outside of the arc cavity wall on both sides of the reforming microchannel plate are the flue gas collection chamber A21 and the flue gas collection chamber B22. The lower end cover 14 has two holes corresponding to the smoke collecting chamber A21 and the smoke collecting chamber B22, wherein the hole below the smoke collecting chamber A21 corresponds to the smoke return pipe 16 on the catalytic combustion flow field plate, and the hole below the smoke collecting chamber B22 corresponds to the smoke exhaust gas outlet pipe 5. A gap is left between the cover 15 and the lower end cover 14.

[0038] Embodiment 3

[0039] Embodiment 3 of the present application provides a working method of a natural gas reforming microchannel reactor based on catalytic combustion, comprising the following steps:

[0040] S1. When the reactor is working, natural gas and air enter the inlet of the catalytic combustion chamber through the first natural gas inlet pipe 1 and the air inlet pipe 2 respectively, and then flow into the volute structure flow field of the catalytic combustion chamber after mixing in the catalytic combustion gas mixing chamber 18 to perform catalytic combustion reaction;

[0041] S2. The high-temperature flue gas generated by the catalytic combustion reaction diffuses from the exhaust hole in the center of the catalytic combustion chamber to the upper and lower sides and enters the high-temperature flue gas distribution chamber 17, where the gas is distributed and then flows into the high-temperature flue gas chamber for heat exchange, and then is discharged into the flue gas collection chamber A21 and the flue gas collection chamber B22, wherein the flue gas in the flue gas collection chamber A21 enters the bottom space of the housing 15 through the flue gas reflux pipe 16, then goes up into the flue gas collection chamber B22 and merges with the flue gas in the flue gas collection chamber B22 and is discharged from the flue gas exhaust outlet pipe 5 together;

[0042] S3. The natural gas and water vapor used for the reforming reaction enter the reforming gas distribution chamber 19 through the second natural gas inlet pipe 3 and the water vapor inlet pipe 4 respectively, where the gases are mixed and distributed before flowing into the reforming reaction chamber, where they absorb the heat conducted from the high-temperature flue gas chamber and the catalytic combustion chamber and undergo a reforming reaction, and the generated gas is discharged into the reforming gas collection chamber 20 and then discharged from the reforming hydrogen outlet pipe 6.

[0043] The natural gas reforming reactor of the microchannel laminated structure of the present invention adopts the natural gas catalytic combustion method to supply the heat required for reforming. The volute structure flow field is adopted in the catalytic combustion part, which greatly increases the contact area between the fuel micro-element and the catalyst, thereby improving the reaction efficiency; at the same time, the part with lower fuel concentration is closer to the center of the volute, and the heat loss at the center is small, so stable combustion can be maintained when the fuel concentration is low. The high-temperature flue gas after catalytic combustion and the reforming gas are arranged in a staggered laminated manner through the microchannel flow field to ensure heat exchange performance and improve reforming efficiency.

Claims

1. A natural gas reforming microchannel reactor based on catalytic combustion, characterized in that: It includes a catalytic combustion chamber, a reforming reaction chamber and a high-temperature flue gas chamber; The catalytic combustion chamber is mainly composed of a first catalytic combustion flow field plate (10) and a second catalytic combustion flow field plate (11) which are symmetrically arranged; a fluid mixing guide plate is arranged at the inlet of the catalytic combustion chamber flow field; the flow field inside the catalytic combustion flow field plate is a volute structure; baffles are arranged along the flow field direction; exhaust holes are arranged at the center positions of the first catalytic combustion flow field plate (10) and the second catalytic combustion flow field plate (11); and a combustion catalyst is coated on the inner surface of the flow field; The reforming reaction chamber is formed by symmetrically arranging a first reforming microchannel plate (9) and a second reforming microchannel plate (12) on both sides of the catalytic combustion chamber; four air cavity partition plates perpendicular to the circumferential tangent are evenly arranged on the outer edges of the circumferences of the first reforming microchannel plate (9) and the second reforming microchannel plate (12); a blunt body is arranged inside the flow field inside the reforming microchannel plate; 1 / 4 arc cavity walls are arranged on both sides along the fluid flow direction; vertical air holes not connected to the reforming flow field are arranged at the center of the first reforming microchannel plate (9) and the second reforming microchannel plate (12); and a reforming catalyst is coated on the inner surface of the flow field; The high-temperature flue gas cavity is formed by arranging a first high-temperature flue gas microchannel plate (8) and a second high-temperature flue gas microchannel plate (13) on the outer side of a reforming microchannel plate. Four air cavity partition plates perpendicular to the circumferential tangent are evenly arranged on the outer circumference of the first high-temperature flue gas microchannel plate (8) and the second high-temperature flue gas microchannel plate (13), and correspond to the air cavity partition plates of the reforming microchannel plate. Blunt bodies are arranged inside the flow field on the inner side of the warm flue gas microchannel plate. The arrangement direction of the blunt bodies of the warm flue gas microchannel plate is perpendicular to the arrangement direction of the blunt bodies of the reforming microchannel plate. 1 / 4 arc cavity walls are arranged on both sides along the fluid flow direction. The arc cavity walls of the high-temperature flue gas microchannel plate and the arc cavity walls of the reforming microchannel plate are staggered. The first high-temperature flue gas microchannel plate (8) and the second high-temperature flue gas microchannel plate (13) are provided with narrow grooves along the diameter direction to form a high-temperature flue gas distribution cavity (17). An upper end cover (7) and a lower end cover (14) are arranged outside the first high-temperature flue gas microchannel plate (8) and the second high-temperature flue gas microchannel plate (13), respectively, and a cover shell (15) is arranged outside the lower end cover (14); a first natural gas inlet pipe (1), a second natural gas inlet pipe (3), an air inlet pipe (2), a water vapor inlet pipe (4), a flue gas exhaust outlet pipe (5) and a reformed hydrogen outlet pipe (6) are welded to the upper end cover (7); Separation plates are correspondingly arranged on the first catalytic combustion flow field plate (10) and the second catalytic combustion flow field plate (11) to form a catalytic combustion gas mixing chamber (18), and the fluid mixing guide plate is located in the catalytic combustion gas mixing chamber (18); The corresponding chambers on the outer sides of the arc cavity walls on both sides of the high-temperature flue gas microchannel plate are respectively a reformed gas distribution chamber (19) and a reformed gas collection chamber (20); The chambers corresponding to the outer sides of the arc cavity walls on both sides of the reforming microchannel plate are respectively a smoke collecting chamber A (21) and a smoke collecting chamber B (22); The lower end cover (14) has two holes corresponding to the smoke collecting chamber A (21) and the smoke collecting chamber B (22), wherein the hole located below the smoke collecting chamber A (21) corresponds to the smoke return pipe (16) on the catalytic combustion flow field plate, and the hole located below the smoke collecting chamber B (22) corresponds to the smoke exhaust outlet pipe (5).

2. The natural gas reforming microchannel reactor based on catalytic combustion according to claim 1, characterized in that: The fluid mixing guide plate adopts a plane guide plate or a spiral guide plate.

3. The natural gas reforming microchannel reactor based on catalytic combustion according to claim 1, characterized in that: The first catalytic combustion flow field plate (10) is provided with pipelines corresponding to the first natural gas inlet pipe (1) and the air inlet pipe (2).

4. The natural gas reforming microchannel reactor based on catalytic combustion according to claim 1, characterized in that: The first catalytic combustion flow field plate (10) and the second catalytic combustion flow field plate (11) are provided with a pipeline corresponding to the flue gas and exhaust gas outlet pipe (5), a pipeline corresponding to the second natural gas inlet pipe (3) and the water vapor inlet pipe (4), and a pipeline corresponding to the reformed hydrogen outlet pipe (6).

5. The natural gas reforming microchannel reactor based on catalytic combustion according to claim 1, characterized in that: A gap is left between the cover shell (15) and the lower end cover (14).

6. A method for operating a natural gas reforming microchannel reactor based on catalytic combustion as claimed in claim 1, characterized in that: The following steps are involved: S1, natural gas and air enter the inlet of the catalytic combustion chamber through the first natural gas inlet pipe (1) and the air inlet pipe (2) respectively, and after being mixed in the catalytic combustion gas mixing chamber (18), flow into the volute structure flow field of the catalytic combustion chamber to perform a catalytic combustion reaction; S2. The high-temperature flue gas generated by the catalytic combustion reaction diffuses from the exhaust hole in the center of the catalytic combustion chamber to the upper and lower sides and enters the high-temperature flue gas distribution chamber (17). After the gas is distributed here, it flows into the high-temperature flue gas chamber for heat exchange and is then discharged into the flue gas collection chamber A (21) and the flue gas collection chamber B (22). The flue gas in the flue gas collection chamber A (21) enters the bottom space of the housing (15) through the flue gas return pipe (16), then goes up into the flue gas collection chamber B (22) and merges with the flue gas in the flue gas collection chamber B (22) and is discharged together from the flue gas exhaust outlet pipe (5); S3. The natural gas and water vapor used for the reforming reaction enter the reforming gas distribution chamber (19) through the second natural gas inlet pipe (3) and the water vapor inlet pipe (4) respectively, where the gases are mixed and distributed before flowing into the reforming reaction chamber, where they absorb heat conducted from the high-temperature flue gas chamber and the catalytic combustion chamber to undergo a reforming reaction, and the generated gas is discharged into the reforming gas collection chamber (20) and then discharged from the reforming hydrogen outlet pipe (6).

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