Surface combustion isothermal methanol reforming hydrogen reactor and method
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ZHONGBEI UNIV
- Filing Date
- 2026-04-10
- Publication Date
- 2026-06-12
AI Technical Summary
Existing methanol reforming hydrogen production reactors suffer from problems such as low hydrogen production yield, high pollutant emissions, high energy consumption, and limited applicability.
It adopts a surface burner and heat-conducting structure design, increases the heat exchange area through the reforming chamber with spiral and tubular structures, and combines the use of heat transfer oil to achieve uniform temperature distribution and efficient heat utilization, while suppressing the generation of nitrogen oxides.
It improves hydrogen production yield, reduces pollutant emissions, lowers energy consumption, and reduces volume through integrated design, thus expanding its applicability.
Smart Images
Figure CN122183531A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of methanol reforming for hydrogen production technology, specifically a methanol reforming reactor and method for hydrogen production with uniform surface combustion temperature. Background Technology
[0002] Methanol reforming hydrogen production reactors are devices that use methanol and water as raw materials to produce hydrogen through a reforming reaction under the action of a catalyst. They are widely used in industrial hydrogen production, fuel cell energy systems, and distributed power generation. However, in practical applications, existing methanol reforming hydrogen production reactors suffer from the following problems due to their structural limitations: First, the use of conventional flame combustion for heating in existing reactors results in uneven flame temperature distribution. This leads to uneven reaction temperature distribution and the generation of large amounts of nitrogen oxides, resulting in both low hydrogen production yield and high pollutant emissions. Second, the small heat exchange area and short heat exchange time between the raw materials and the reforming chamber in existing reactors lead to low heat utilization efficiency and high energy consumption. Third, the discrete design of existing reactors results in a large volume, limiting their applicability. Therefore, it is necessary to invent a methanol reforming hydrogen production reactor and method with uniform surface combustion temperature to solve the problems of low hydrogen production yield, high pollutant emissions, high energy consumption, and limited applicability of existing reactors. Summary of the Invention
[0003] To address the problems of low hydrogen production yield, high pollutant emissions, high energy consumption, and limited applicability of existing methanol reforming hydrogen production reactors, this invention provides a methanol reforming hydrogen production reactor and method with uniform surface combustion temperature.
[0004] This invention is achieved using the following technical solution: A methanol reforming hydrogen production reactor with uniform surface combustion temperature includes a feed cylinder closed at the left end and open at the right end; a feed pipe is connected to the side wall of the feed cylinder; a reforming tube is connected to the right end of the feed cylinder; a spiral-shaped heat-conducting fin is fixed to the inner side of the reforming tube; a heat-conducting pipe is fixed to the inner side of the heat-conducting fin, and the right end face of the heat-conducting pipe extends beyond the right end face of the reforming tube; the heat-conducting pipe, the heat-conducting fin, and the reforming tube together enclose a first reforming chamber with a spiral structure. The right end of the reforming tube is connected to a reforming cylinder that is open on the left and closed on the right, and the right inner end face of the reforming cylinder is in contact with the right end face of the heat conduction tube; the side wall of the reforming cylinder is connected to an exhaust pipe; the right end wall of the reforming cylinder is connected to a flue pipe; a second reforming chamber with a tubular structure is left between the reforming cylinder and the heat conduction tube, and the second reforming chamber is connected to the first reforming chamber and the exhaust pipe respectively. A surface burner is installed in both the raw material cylinder and the heat-conducting pipe. The surface burner is connected to a gas inlet pipe and an air inlet pipe, both of which penetrate the side wall of the raw material cylinder. A cup-shaped raw material chamber is provided between the surface burner and the raw material cylinder, and the raw material chamber is connected to the first reforming chamber and the feed pipe. A cup-shaped combustion chamber is provided between the surface burner and the heat-conducting pipe, and the combustion chamber is connected to the exhaust pipe. An igniter is fixed on the surface burner and is located in the combustion chamber.
[0005] Furthermore, the surface burner includes a porous baffle sealing the left end of the heat-conducting tube; a premixing cylinder with its left end closed and its right end open is fixed to the left end face of the porous baffle; both the gas inlet pipe and the air inlet pipe are connected to the side wall of the premixing cylinder; the raw material chamber is located between the premixing cylinder and the raw material cylinder; a guide cylinder with its left end open and its right end closed is fixed to the right end face of the porous baffle, and the guide cylinder is connected to the premixing cylinder through the holes of the porous baffle; an inner porous cylinder with its left end open and its right end closed is connected to the right end wall of the guide cylinder. The outer side of the guide tube is fitted with an outer porous cylinder that is open at the left end and closed at the right end, and the outer porous cylinder is fixed to the right end face of the porous baffle; the right end of the inner porous cylinder is fixedly supported on the right end wall of the outer porous cylinder; a pressure stabilizing chamber with a tubular structure is left between the outer porous cylinder and the inner porous cylinder, and the pressure stabilizing chamber is connected to the inner porous cylinder through the holes of the inner porous cylinder; the combustion chamber is located between the outer porous cylinder and the heat conduction pipe, and the combustion chamber is connected to the pressure stabilizing chamber through the holes of the outer porous cylinder; the igniter is fixed to the right end face of the porous baffle.
[0006] Furthermore, the heat-conducting pipe has a tubular heat-conducting jacket inside its sidewall; the heat-conducting jacket is filled with heat-conducting oil; the gas inlet pipe and the air inlet pipe are directly opposite each other; the holes of the porous baffle are arranged in a circular array; the holes of the inner porous cylinder are arranged in equidistant rows; the holes of the outer porous cylinder are arranged in equidistant rows; the raw material cylinder, reforming pipe, heat-conducting pipe, reforming cylinder, flue pipe, porous baffle, premixing cylinder, guide cylinder, inner porous cylinder, and outer porous cylinder are arranged coaxially.
[0007] A method for methanol reforming to produce hydrogen with uniform surface combustion temperature, the method being implemented based on a methanol reforming hydrogen production reactor with uniform surface combustion temperature as described in this invention, and the method comprising the following steps: Step 1: Connect the feed pipe to the external methanol supply system and the external steam supply system respectively, connect the gas inlet pipe to the external gas supply system, and connect the air inlet pipe to the external air supply system; Step Two: Activate the external gas supply system, external air supply system, and igniter. The external gas supply system injects gas into the premixing cylinder through the gas inlet pipe, and the external air supply system injects air into the premixing cylinder through the air inlet pipe. The gas and air are premixed in the premixing cylinder to obtain premixed gas. The premixed gas is first rectified through the holes of the perforated baffle, and then flows sequentially through the guide tube, the inner perforated cylinder, and the pressure stabilizing chamber to the combustion chamber, where it is ignited by the igniter, resulting in uniform combustion on the outer surface of the outer perforated cylinder. The flame and flue gas generated by combustion uniformly heat the heat conduction tube, thereby creating a uniformly distributed reaction temperature in the first and second reforming chambers. During this process, the flue gas is discharged outward through the exhaust pipe. Step 3: Start the external steam supply system. The external steam supply system injects steam into the raw material chamber through the feed pipe. The steam flows through the raw material chamber, the first reforming chamber, and the second reforming chamber in sequence and is discharged to the outside through the exhaust pipe, thereby purging the air from the raw material chamber, the first reforming chamber, and the second reforming chamber. Step 4: Keep the external steam supply system running and start the external methanol supply system. The external methanol supply system and the external steam supply system inject gaseous methanol and steam into the feed chamber through the feed pipes, respectively. The gaseous methanol and steam flow sequentially through the feed chamber, the first reforming chamber, and the second reforming chamber. During this process, the gaseous methanol and steam come into contact with the catalyst in the first reforming chamber and exchange heat with the first and second reforming chambers, thereby generating hydrogen through the reforming reaction. The hydrogen is discharged to the outside through the outlet pipe.
[0008] Furthermore, in step two, since the heat-conducting interlayer is filled with heat-conducting oil, the good thermal conductivity of the heat-conducting oil can further improve the uniformity of the reaction temperature distribution in the first and second reforming chambers.
[0009] Furthermore, in step two, since the gas inlet pipe and the air inlet pipe are directly opposite each other, the gas and air can be injected into the premixing cylinder in an opposing manner, thereby achieving full premixing.
[0010] Furthermore, in step two, since the holes of the porous baffle are arranged in a circular array, it can both disturb the premixed gas to enhance the rectification effect and avoid the risk of backfire in the premixed gas.
[0011] Furthermore, in step two, since the holes of the inner porous cylinder are arranged in equidistant rows, it can ensure that the premixed gas is evenly distributed in the pressure stabilizing chamber.
[0012] Furthermore, in step two, since the holes of the outer porous cylinder are arranged in equidistant rows, it can ensure that the premixed gas is evenly distributed in the combustion chamber.
[0013] Compared with existing methanol reforming hydrogen production reactors, the methanol reforming hydrogen production reactor and method with surface combustion homogenization described in this invention have the following advantages: First, this invention no longer uses traditional flame combustion for heating, but instead employs a surface burner and a novel heat-conducting structure, thereby generating a uniformly distributed flame temperature. This results in a uniformly distributed reaction temperature and effectively suppresses the formation of nitrogen oxides, thus effectively increasing hydrogen production yield and reducing pollutant emissions. Second, by setting up a spiral-shaped first reforming chamber and a tubular second reforming chamber, this invention effectively increases the heat exchange area between the feedstock and the reforming chamber and effectively extends the heat exchange time between the feedstock and the reforming chamber, thereby effectively improving heat utilization efficiency and reducing energy consumption. Third, the integrated design of this invention effectively reduces volume, thus expanding its applicability.
[0014] This invention effectively solves the problems of low hydrogen production yield, high pollutant emissions, high energy consumption, and limited applicability of existing methanol reforming hydrogen production reactors. It is applicable to fields such as industrial hydrogen production, fuel cell energy systems, and distributed power generation. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of a methanol reforming hydrogen production reactor with uniform surface combustion temperature according to the present invention.
[0016] Figure 2 yes Figure 1 A sectional view.
[0017] Figure 3 yes Figure 1 Partial structural diagram Figure 1 .
[0018] Figure 4 yes Figure 3 A sectional view.
[0019] Figure 5 yes Figure 1 Partial structural diagram Figure 2 .
[0020] Figure 6 yes Figure 5 A sectional view.
[0021] Figure 7 yes Figure 1 Partial structural diagram Figure 3 .
[0022] Figure 8 yes Figure 7 A sectional view.
[0023] Figure 9 yes Figure 1Partial structural diagram Figure 4 .
[0024] Figure 10 yes Figure 9 A sectional view.
[0025] Figure 11 yes Figure 3 Another structural diagram from another angle.
[0026] Figure 12 yes Figure 9 Another structural diagram from another angle.
[0027] In the diagram: 1-Raw material cylinder, 2-Feed pipe, 3-Forming pipe, 4-Heat-conducting fin, 5-Heat-conducting pipe, 5.1-Heat-conducting jacket, 6-Forming cylinder, 7-Gas outlet pipe, 8-Fume exhaust pipe, 9-Gas inlet pipe, 10-Air inlet pipe, 11-Igniter, 12-Porous baffle, 13-Premix cylinder, 14-Guide cylinder, 15-Inner porous cylinder, 16-Outer porous cylinder. Detailed Implementation
[0028] A methanol reforming hydrogen production reactor with uniform surface combustion temperature includes a feed cylinder 1 that is closed at the left end and open at the right end; a feed pipe 2 is connected to the side wall of the feed cylinder 1; a reforming tube 3 is connected to the right end of the feed cylinder 1; a spiral-shaped heat-conducting fin 4 is fixed to the inner side of the reforming tube 3; a heat-conducting pipe 5 is fixed to the inner side of the heat-conducting fin 4, and the right end face of the heat-conducting pipe 5 extends beyond the right end face of the reforming tube 3; the heat-conducting pipe 5, the heat-conducting fin 4, and the reforming tube 3 together enclose a first reforming chamber with a spiral structure. The right end of the reforming tube 3 is connected to a reforming cylinder 6, which is open on the left and closed on the right, and the right inner end face of the reforming cylinder 6 is in contact with the right end face of the heat-conducting tube 5; the side wall of the reforming cylinder 6 is connected to an exhaust pipe 7; the right end wall of the reforming cylinder 6 is connected to a flue pipe 8; a second reforming chamber with a tubular structure is left between the reforming cylinder 6 and the heat-conducting tube 5, and the second reforming chamber is connected to the first reforming chamber and the exhaust pipe 7 respectively. A surface burner is provided in both the raw material cylinder 1 and the heat-conducting pipe 5; the surface burner is connected to a gas inlet pipe 9 and an air inlet pipe 10, and both the gas inlet pipe 9 and the air inlet pipe 10 penetrate the side wall of the raw material cylinder 1; a cup-shaped raw material chamber is left between the surface burner and the raw material cylinder 1, and the raw material chamber is connected to the first reforming chamber and the feed pipe 2; a cup-shaped combustion chamber is left between the surface burner and the heat-conducting pipe 5, and the combustion chamber is connected to the exhaust pipe 8; an igniter 11 is fixed on the surface burner, and the igniter 11 is located in the combustion chamber.
[0029] The surface burner includes a porous baffle 12 covering the left end of the heat-conducting pipe 5; a premixing cylinder 13, closed on the left and open on the right, is fixed to the left end face of the porous baffle 12; the gas inlet pipe 9 and the air inlet pipe 10 are both connected to the side wall of the premixing cylinder 13; the raw material chamber is located between the premixing cylinder 13 and the raw material cylinder 1; a guide cylinder 14, open on the left and closed on the right, is fixed to the right end face of the porous baffle 12, and the guide cylinder 14 is connected to the premixing cylinder 13 through the holes of the porous baffle 12; an inner porous cylinder 15, open on the left and closed on the right, is connected to the right end wall of the guide cylinder 14; the guide cylinder 14 is connected to the inner porous cylinder 15, open on the left and closed on the right. An outer porous cylinder 16, open at the left end and closed at the right end, is fitted on the outer side of the cylinder 14, and the outer porous cylinder 16 is fixed to the right end face of the porous baffle 12; the right end of the inner porous cylinder 15 is fixedly supported on the right end wall of the outer porous cylinder 16; a pressure stabilizing chamber with a tubular structure is left between the outer porous cylinder 16 and the inner porous cylinder 15, and the pressure stabilizing chamber is connected to the inner porous cylinder 15 through the holes of the inner porous cylinder 15; the combustion chamber is located between the outer porous cylinder 16 and the heat conduction pipe 5, and the combustion chamber is connected to the pressure stabilizing chamber through the holes of the outer porous cylinder 16; the igniter 11 is fixed to the right end face of the porous baffle 12.
[0030] The heat-conducting pipe 5 has a tubular heat-conducting jacket 5.1 inside its sidewall; the heat-conducting jacket 5.1 is filled with heat-conducting oil; the gas inlet pipe 9 and the air inlet pipe 10 are directly opposite each other; the holes of the porous baffle 12 are arranged in a circular array; the holes of the inner porous cylinder 15 are arranged in equidistant rows; the holes of the outer porous cylinder 16 are arranged in equidistant rows; the raw material cylinder 1, the reforming pipe 3, the heat-conducting pipe 5, the reforming cylinder 6, the flue pipe 8, the porous baffle 12, the premixing cylinder 13, the guide cylinder 14, the inner porous cylinder 15, and the outer porous cylinder 16 are arranged coaxially.
[0031] A method for methanol reforming to produce hydrogen with uniform surface combustion temperature, the method being implemented based on a methanol reforming hydrogen production reactor with uniform surface combustion temperature as described in this invention, and the method comprising the following steps: Step 1: Connect feed pipe 2 to the external methanol supply system and external steam supply system respectively, connect gas inlet pipe 9 to the external gas supply system, and connect air inlet pipe 10 to the external air supply system; Step 2: Start the external gas supply system, external air supply system, and igniter 11. The external gas supply system injects gas into the premixing cylinder 13 through the gas inlet pipe 9, and the external air supply system injects air into the premixing cylinder 13 through the air inlet pipe 10. The gas and air are premixed in the premixing cylinder 13 to obtain premixed gas. The premixed gas is first rectified through the holes of the porous baffle 12, and then flows sequentially through the guide cylinder 14, the inner porous cylinder 15, and the pressure stabilizing chamber to the combustion chamber, where it is ignited by the igniter 11, resulting in uniform combustion on the outer surface of the outer porous cylinder 16. The flame and flue gas generated by combustion uniformly heat the heat conduction pipe 5, thereby generating a uniformly distributed reaction temperature in the first and second reforming chambers. During this process, the flue gas is discharged to the outside through the exhaust pipe 8. Step 3: Start the external steam supply system. The external steam supply system injects steam into the raw material chamber through the feed pipe 2. The steam flows through the raw material chamber, the first reforming chamber, and the second reforming chamber in sequence and is discharged to the outside through the exhaust pipe 7, thereby purging the air in the raw material chamber, the first reforming chamber, and the second reforming chamber. Step 4: Keep the external steam supply system running and start the external methanol supply system. The external methanol supply system and the external steam supply system inject gaseous methanol and steam into the feed chamber through feed pipe 2, respectively. The gaseous methanol and steam flow through the feed chamber, the first reforming chamber, and the second reforming chamber in sequence. During this process, the gaseous methanol and steam come into contact with the catalyst in the first reforming chamber and exchange heat with the first and second reforming chambers, thereby generating hydrogen through the reforming reaction. The hydrogen is discharged to the outside through the outlet pipe 7.
[0032] In step two, since the thermally conductive interlayer 5.1 is filled with thermally conductive oil, the good thermal conductivity of the thermally conductive oil can further improve the uniformity of the reaction temperature distribution in the first and second reforming chambers.
[0033] In step two, since the gas inlet pipe 9 and the air inlet pipe 10 are directly opposite each other, the gas and air can be injected into the premixing cylinder 13 in an opposing manner, thereby achieving full premixing.
[0034] In step two, since the holes of the porous baffle 12 are arranged in a circular array, it can both disturb the premixed gas to enhance the rectification effect and avoid the risk of backfire in the premixed gas.
[0035] In step two, since the holes of the inner porous cylinder 15 are arranged in equal rows, the premixed gas can be uniformly distributed in the pressure stabilizing chamber.
[0036] In step two, since the holes of the outer porous cylinder 16 are arranged in equal rows, the premixed gas can be uniformly distributed in the combustion chamber.
[0037] In specific implementation, the catalyst is CuO-ZnO-Al2O3. Temperature sensors are installed in the combustion chamber, raw material chamber, first reforming chamber, second reforming chamber, and exhaust pipe 7. The length of the thermally conductive jacket 5.1 is greater than both the axial length of the thermally conductive rib plate 4 and the length of the outer porous cylinder 16. The igniter 11 is a remote-controlled igniter.
[0038] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.
Claims
1. A methanol reforming hydrogen production reactor with uniform surface combustion temperature, characterized in that: The material cylinder (1) is closed on the left and open on the right. A feed pipe (2) is connected to the side wall of the material cylinder (1). A reforming pipe (3) is connected to the right end of the material cylinder (1). A spiral-shaped heat-conducting fin (4) is fixed on the inner side of the reforming pipe (3). A heat-conducting pipe (5) is fixed on the inner side of the heat-conducting fin (4), and the right end of the heat-conducting pipe (5) extends beyond the right end of the reforming pipe (3). The heat-conducting pipe (5), the heat-conducting fin (4), and the reforming pipe (3) together form a spiral-shaped first reforming chamber. The right end of the reforming tube (3) is connected to a reforming cylinder (6) that is open on the left and closed on the right, and the right inner end face of the reforming cylinder (6) is in contact with the right end face of the heat-conducting tube (5); the side wall of the reforming cylinder (6) is connected to an exhaust pipe (7); the right end wall of the reforming cylinder (6) is connected to a flue pipe (8); a second reforming chamber with a tubular structure is left between the reforming cylinder (6) and the heat-conducting tube (5), and the second reforming chamber is connected to the first reforming chamber and the exhaust pipe (7) respectively; A surface burner is provided in both the raw material cylinder (1) and the heat-conducting pipe (5); the surface burner is connected to the gas inlet pipe (9) and the air inlet pipe (10), and the gas inlet pipe (9) and the air inlet pipe (10) both penetrate the side wall of the raw material cylinder (1); a cup-shaped raw material chamber is left between the surface burner and the raw material cylinder (1), and the raw material chamber is connected to the first reforming chamber and the feed pipe (2) respectively; a cup-shaped combustion chamber is left between the surface burner and the heat-conducting pipe (5), and the combustion chamber is connected to the exhaust pipe (8); an igniter (11) is fixed on the surface burner, and the igniter (11) is located in the combustion chamber.
2. The methanol reforming hydrogen production reactor with uniform surface combustion temperature according to claim 1, characterized in that: The surface burner includes a perforated baffle (12) covering the left end of the heat-conducting pipe (5); a premixing cylinder (13) with its left end closed and its right end open is fixed to the left end face of the perforated baffle (12); the gas inlet pipe (9) and the air inlet pipe (10) are both connected to the side wall of the premixing cylinder (13); the raw material chamber is located between the premixing cylinder (13) and the raw material cylinder (1); a guide cylinder (14) with its left end open and its right end closed is fixed to the right end face of the perforated baffle (12), and the guide cylinder (14) is connected to the premixing cylinder (13) through the holes of the perforated baffle (12); an inner perforated cylinder (15) with its left end open and its right end closed is connected to the right end wall of the guide cylinder (14); The outer side of the flow tube (14) is fitted with an outer porous tube (16) that is open at the left end and closed at the right end, and the outer porous tube (16) is fixed to the right end face of the porous baffle (12); the right end of the inner porous tube (15) is fixedly supported on the right end wall of the outer porous tube (16); a pressure stabilizing chamber with a tubular structure is left between the outer porous tube (16) and the inner porous tube (15), and the pressure stabilizing chamber is connected to the inner porous tube (15) through each hole of the inner porous tube (15); the combustion chamber is located between the outer porous tube (16) and the heat conduction tube (5), and the combustion chamber is connected to the pressure stabilizing chamber through each hole of the outer porous tube (16); the igniter (11) is fixed to the right end face of the porous baffle (12).
3. The methanol reforming hydrogen production reactor with uniform surface combustion temperature according to claim 2, characterized in that: The heat-conducting pipe (5) has a tubular heat-conducting jacket (5.1) inside its sidewall; the heat-conducting jacket (5.1) is filled with heat-conducting oil; the gas inlet pipe (9) and the air inlet pipe (10) are directly opposite each other; the holes of the porous baffle (12) are arranged in a circular array; the holes of the inner porous cylinder (15) are arranged in equidistant rows; the holes of the outer porous cylinder (16) are arranged in equidistant rows; the raw material cylinder (1), the reforming pipe (3), the heat-conducting pipe (5), the reforming cylinder (6), the flue pipe (8), the porous baffle (12), the premixing cylinder (13), the guide cylinder (14), the inner porous cylinder (15), and the outer porous cylinder (16) are arranged coaxially.
4. A method for methanol reforming to produce hydrogen with uniform surface combustion temperature, the method being implemented based on a methanol reforming to produce hydrogen with uniform surface combustion temperature as described in claim 2, characterized in that: This method is implemented using the following steps: Step 1: Connect the feed pipe (2) to the external methanol supply system and the external steam supply system respectively, connect the gas inlet pipe (9) to the external gas supply system, and connect the air inlet pipe (10) to the external air supply system; Step 2: Start the external gas supply system, external air supply system, and igniter (11). The external gas supply system injects gas into the premixing cylinder (13) through the gas inlet pipe (9), and the external air supply system injects air into the premixing cylinder (13) through the air inlet pipe (10). The gas and air are premixed in the premixing cylinder (13) to obtain premixed gas. The premixed gas is first rectified through the holes of the perforated baffle (12), and then flows through the guide cylinder (14), the inner perforated cylinder (15), and the pressure stabilizing chamber to the combustion chamber. It is then ignited by the igniter (11), and thus burns evenly on the outer side of the outer perforated cylinder (16). The flame and flue gas formed by combustion heat the heat conduction pipe (5) evenly, thereby generating a uniformly distributed reaction temperature in the first reforming chamber and the second reforming chamber. During this process, the flue gas is discharged to the outside through the exhaust pipe (8). Step 3: Start the external steam supply system. The external steam supply system injects steam into the raw material chamber through the feed pipe (2). The steam flows through the raw material chamber, the first reforming chamber and the second reforming chamber in sequence and is discharged to the outside through the exhaust pipe (7), thereby purging the air in the raw material chamber, the first reforming chamber and the second reforming chamber. Step 4: Keep the external steam supply system running and start the external methanol supply system. The external methanol supply system and the external steam supply system inject gaseous methanol and steam into the raw material chamber through the feed pipe (2), respectively. The gaseous methanol and steam flow through the raw material chamber, the first reforming chamber and the second reforming chamber in sequence. During this process, the gaseous methanol and steam come into contact with the catalyst in the first reforming chamber on the one hand, and exchange heat with the first reforming chamber and the second reforming chamber on the other hand, thereby generating hydrogen through the reforming reaction. The hydrogen is discharged to the outside through the outlet pipe (7).
5. The method for methanol reforming to produce hydrogen with uniform surface combustion temperature according to claim 4, characterized in that: In step two, since the heat-conducting interlayer (5.1) is filled with heat-conducting oil, the good heat conduction properties of the heat-conducting oil can further improve the uniformity of the reaction temperature distribution in the first and second reforming chambers.
6. The method for methanol reforming to produce hydrogen with uniform surface combustion temperature according to claim 4, characterized in that: In step two, since the gas inlet pipe (9) and the air inlet pipe (10) are directly opposite each other, the gas and air can be injected into the premixing cylinder (13) in a counter-current manner, thereby achieving full premixing.
7. The method for methanol reforming to produce hydrogen with uniform surface combustion temperature according to claim 4, characterized in that: In step two, since the holes of the porous baffle (12) are arranged in a circular array, it can disturb the premixed gas to enhance the rectification effect, and avoid the risk of backfire of the premixed gas.
8. The method for methanol reforming to produce hydrogen with uniform surface combustion temperature according to claim 4, characterized in that: In step two, since the holes of the inner porous cylinder (15) are arranged in equal rows, the premixed gas can be uniformly distributed in the pressure stabilizing chamber.
9. A method for producing hydrogen from methanol via surface combustion homogenization according to claim 4, characterized in that: In step two, since the holes of the outer porous cylinder (16) are arranged in equal rows, the premixed gas can be evenly distributed in the combustion chamber.