Methane hydrogen production device and method

Abstract

The present application provides a methane hydrogen production device and method, which relates to the technical field of methane hydrogen production. The device includes: a first reactor configured to catalytically process methane to form a mixed gas; a second reactor spaced apart from the first reactor and configured to heat-treat the mixed gas to form hydrogen; a heater including a first heating end and a second heating end, the first reactor being in contact with the first heating end, the second reactor being in contact with the second heating end, the heater being configured to heat the first reactor and the second reactor, the first heating end having a first heating temperature T1 and the second heating end having a second heating temperature T2, satisfying: T1 < T2. The first reactor can utilize the waste heat when the heater heats the second reactor to complete the catalytic treatment of methane. At the same time, the first reactor can also serve as a heat insulation layer of the heater, reducing heat loss caused by heat exchange between the heater and the surrounding environment.

Description

Technical Field

[0001] The present application relates to the technical field of methane hydrogen production, and in particular to a methane hydrogen production device and method. Background Art

[0002] During the methane hydrogen production process, a heater is needed to heat the reactor. The heater itself will also reach a very high temperature during the heating process. Therefore, the energy lost due to heat exchange between the heater and its surrounding environment is still considerable, resulting in low energy utilization rate of methane hydrogen production. Summary of the Invention

[0003] The present application provides a methane hydrogen production device, which improves energy utilization.

[0004] In a first aspect, the present application provides a methane hydrogen production device, comprising:

[0005] a first reactor configured to catalytically process methane to form a mixed gas;

[0006] a second reactor, the second reactor being spaced apart from the first reactor, and the second reactor being configured to heat the mixed gas to form hydrogen;

[0007] A heater comprising a first heating end and a second heating end facing away from the first heating end, wherein the first reactor is attached to the first heating end and the second reactor is attached to the second heating end, and the heater is configured to heat the first reactor and the second reactor, wherein the first heating end has a first heating temperature T1 and the second heating end has a second heating temperature T2, and wherein: T1 <T2。

[0008] In some embodiments, the heater includes a first shell and a second shell;

[0009] The first heating end is arranged on the first shell, the second heating end is arranged on the second shell, the first shell and the second shell enclose a first cavity, the second shell encloses a second cavity, the first cavity is configured to be provided with a heating element, and the second cavity is configured to be provided with a second reactor.

[0010] In some embodiments, the first reactor comprises a third shell and a fourth shell;

[0011] The third shell and the fourth shell form a third cavity, the fourth shell forms a fourth cavity, and the fourth cavity is configured to accommodate the heater;

[0012] The second reactor has a fifth shell, the fifth shell encloses a fifth cavity, and the third cavity is connected to the fifth cavity.

[0013] In some embodiments, the device further comprises:

[0014] A delivery pipeline is connected to the third cavity and the fifth cavity, and the delivery pipeline is configured to deliver the mixed gas from the first reactor to the second reactor.

[0015] In some embodiments, the device further comprises:

[0016] An adapter, one end of which is connected to the third cavity, and the other end of which is connected to the delivery pipeline.

[0017] In some embodiments, the device further comprises:

[0018] a sealing cover connected to the fifth shell and sealing the fifth cavity;

[0019] A sealing gasket is provided between the sealing cover and the fifth shell.

[0020] In some embodiments, the sealing cover is provided with an exhaust hole, the exhaust hole being in communication with the fifth cavity, and the exhaust hole being configured to discharge the hydrogen;

[0021] The device further comprises an exhaust pipeline connected to the exhaust hole.

[0022] In some embodiments, the device further comprises:

[0023] an air inlet, the air inlet being provided at one end of the first reactor, the air inlet being in communication with the third cavity, and the air inlet being configured to introduce methane to be processed into the first reactor;

[0024] A gas outlet is provided at the other end of the first reactor, the gas outlet is communicated with the third cavity, and the gas outlet is configured to discharge the mixed gas from the first reactor.

[0025] In some embodiments, the device further comprises:

[0026] A gas disperser is provided with a plurality of air holes. The gas disperser is arranged in the third cavity and close to one side of the air inlet. The gas disperser is configured to evenly disperse the methane to be treated.

[0027] In some embodiments, the second reactor is provided with a through hole.

[0028] The device further includes: a temperature measuring element, which passes through the second reactor through the through hole, and the temperature measuring element is configured to measure the temperature inside the second reactor.

[0029] In some embodiments, the device further includes:

[0030] a catalyst, which is disposed inside the first reactor, and the catalyst is configured to catalytically treat the methane to be processed.

[0031] In some embodiments, the device further includes:

[0032] a heating medium, which is disposed inside the second reactor, and the heating medium is configured to heat-treat the mixed gas.

[0033] The second aspect of the present application provides a method for producing hydrogen from methane, using the methane hydrogen production device as described above. The method includes:

[0034] heating the first reactor and the second reactor using a heater;

[0035] transporting the methane to be processed into the first reactor for catalytic treatment to form a mixed gas;

[0036] transporting the mixed gas into the second reactor for heating treatment to form hydrogen and carbon-containing compounds.

[0037] A methane hydrogen production device includes: a first reactor configured to catalytically treat methane to form a mixed gas; a second reactor spaced apart from the first reactor, the second reactor being configured to heat-treat the mixed gas to form hydrogen; a heater including a first heating end and a second heating end facing away from the first heating end, the first reactor being in contact with the first heating end, the second reactor being in contact with the second heating end, the heater being configured to heat the first reactor and the second reactor, the first heating end having a first heating temperature T1, the second heating end having a second heating temperature T2, satisfying: T1 < T2. This enables the first reactor to fully utilize the waste heat when the heater heats the second reactor to complete the catalytic treatment of methane. At the same time, the first reactor can also serve as the heat insulation layer of the heater, reducing the heat loss caused by heat exchange between the heater and the surrounding environment and improving the energy utilization rate. In addition, using the first reactor to catalytically treat methane can also improve the conversion efficiency of methane hydrogen production. Description of the Drawings

[0038] In order to more clearly illustrate the technical solutions in this application, the following is a brief introduction to the drawings required for use in the description of the implementation methods. Obviously, the drawings described below are only some implementation methods of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 A schematic diagram of the structure of a methane hydrogen production device provided in an embodiment of the present application;

[0040] Figure 2 A cross-sectional view of a methane hydrogen production device provided in an embodiment of the present application;

[0041] Figure 3 A cross-sectional view of a methane hydrogen production device provided in an embodiment of the present application;

[0042] Figure 4 A cross-sectional view of a gas disperser in a methane hydrogen production device provided in an embodiment of the present application;

[0043] Figure 5 A flow chart of a method for producing hydrogen from methane provided in an embodiment of the present application;

[0044] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0045] 1. First reactor; 101. Third shell; 102. Fourth shell; 103. Third cavity; 104. Fourth cavity; 2. Second reactor; 201. Fifth shell; 202. Fifth cavity; 21. Through hole; 3. Heater; 301. First shell; 302. Second shell; 303. First cavity; 304. Second cavity; 31. First heating end; 32. Second heating end; 4. Delivery pipeline; 5. Sealing cover; 51. Exhaust hole; 52. Mounting hole; 6. Sealing gasket; 7. Exhaust pipeline; 8. Adapter; 9. Air inlet; 10. Air outlet; 11. Gas disperser; 1101. Air hole; 12. Temperature measuring element; 13. Catalyst; 14. Heating medium; 15. Converter. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0047] It should be noted that the serial number terms such as [First], [Second], [Third], [Fourth], etc. mentioned in this application do not represent any order, quantity or importance, but are only configured to distinguish different parts. The direction terms such as [up], [down], [left], [right], etc. mentioned in this application are only references to the directions of the attached drawings. Therefore, the serial number terms, direction terms and positional relationship terms used are for the purpose of explaining and understanding this application, rather than for limiting this application. In the figures, units with similar structures are denoted by the same reference numerals.

[0048] Please refer to Figures 1 to 4 , in the first aspect of this application, a methane hydrogen production device is provided, which includes a first reactor 1, a second reactor 2 and a heater 3. The first reactor 1 is configured to catalytically process methane to form a mixed gas; the second reactor 2 is arranged at an interval from the first reactor 1, and the second reactor 2 is configured to heat-treat the mixed gas to form hydrogen; the heater 3 includes a first heating end 31 and a second heating end 32 facing away from the first heating end 31. The first reactor 1 is in contact with the first heating end 31, and the second reactor 2 is in contact with the second heating end 32. The heater 3 is configured to heat the first reactor 1 and the second reactor 2. The first heating end 31 has a first heating temperature T1, and the second heating end 32 has a second heating temperature T2, satisfying: T1 < T2.

[0049] It can be understood that in this application, by making the heater 3 include a first heating end 31 and a second heating end 32, the first reactor 1 is in contact with the first heating end 31, and the second reactor 2 is in contact with the second heating end 32. The first heating end 31 has a first heating temperature T1, and the second heating end 32 has a second heating temperature T2, satisfying: T1 < T2, so that the first reactor 1 can make full use of the waste heat when the heater 3 heats the second reactor 2 to complete the catalytic treatment of methane. At the same time, the first reactor 1 can also serve as a heat insulation layer of the heater 3, which can reduce the heat loss caused by heat exchange between the heater 3 and the surrounding environment and improve the energy utilization rate; in addition, using the first reactor 1 to catalytically process methane can also improve the conversion efficiency of methane hydrogen production.

[0050] In some embodiments, the range of the first heating temperature T1 is 200 - 600 °C. Specifically, the first heating temperature T1 can be any value or the range composed of any two values among 200 °C, 250 °C, 300 °C, 350 °C, 400 °C, 450 °C, 500 °C, 550 °C, 600 °C.

[0051] In some embodiments, the second heating temperature T2 is in the range of 500-1000° C. Specifically, the second heating temperature T2 can be any one of 500° C., 550° C., 600° C., 650° C., 700° C., 750° C., 800° C., 850° C., 900° C., 950° C., and 1000° C., or a range consisting of any two of the values.

[0052] In some embodiments, the mixed gas includes alkanes, alkenes, and alkynes.

[0053] In some embodiments, the heater 3 is disposed around the second reactor 2 , and the first reactor 1 is disposed around the heater 3 .

[0054] In some embodiments, the first reactor 1 comprises a ring, the second reactor 2 comprises a circle, and the heater 3 comprises a ring.

[0055] In some embodiments, the heater 3 includes a first shell 301 and a second shell 302; the first heating end 31 is provided on the first shell 301, and the second heating end 32 is provided on the second shell 302. The first shell 301 and the second shell 302 enclose a first cavity 303, and the second shell 302 encloses a second cavity 304. The first cavity 303 is configured to be provided with a heating element, and the second cavity 304 is configured to be provided with a second reactor 2.

[0056] It can be understood that the heater 3 has a first cavity 303 and a second cavity 304. The first cavity 303 is used to set the heating element, and the second cavity 304 is used to set the second reactor 2. The present application can improve the heating effect of the heater 3 on the second reactor 2 by locating the second reactor 2 inside the heater 3.

[0057] In some embodiments, the heater 3 is selected from any one of an electric heater, a gas burner, and a pulverized coal burner.

[0058] In some embodiments, when the heater 3 is an electric heater, the heating element includes a resistance wire, a temperature monitoring system, and the like.

[0059] In some embodiments, the first reactor 1 includes a third shell 101 and a fourth shell 102; the third shell 101 and the fourth shell 102 enclose a third cavity 103, the fourth shell 102 encloses a fourth cavity 104, and the fourth cavity 104 is configured to be provided with a heater 3; the second reactor 2 has a fifth shell 201, the fifth shell 201 encloses a fifth cavity 202, and the third cavity 103 and the fifth cavity 202 are connected.

[0060] It can be understood that the first reactor 1 has a third cavity 103 and a fourth cavity 104. The third cavity 103 is used for catalytic treatment of methane to form a mixed gas, and the fourth cavity 104 is used to set the heater 3, so that the first reactor 1 can cover the outer wall of the heater 3, and can make full use of the waste heat when the heater 3 heats the second reactor 2 to complete the catalytic treatment of methane. At the same time, the first reactor 1 can also serve as an insulation layer of the heater 3, which can reduce the heat loss caused by heat exchange between the heater 3 and the surrounding environment, thereby improving energy utilization.

[0061] In some embodiments, the fifth shell 201 and the second shell 302 may be connected by welding, and the first shell 301 and the fourth shell 102 may be connected by welding.

[0062] In some embodiments, the heater 3 and the second reactor 2 may share the fifth shell 201 or the second shell 302 ; the heater 3 and the first reactor 1 may share the fourth shell 102 or the first shell 301 .

[0063] In some embodiments, the device further includes: a delivery pipeline 4 , which is connected to the third cavity 103 and the fifth cavity 202 , and is configured to deliver the mixed gas from the first reactor 1 to the second reactor 2 .

[0064] It is understandable that the present application provides a delivery pipeline 4 , which connects the third cavity 103 and the fifth cavity 202 . The delivery pipeline 4 can deliver the mixed gas formed by methane catalysis from the first reactor 1 to the second reactor 2 .

[0065] In some embodiments, the device further includes: an adapter 8 , one end of the adapter 8 is connected to the third cavity 103 , and the other end of the adapter 8 is connected to the delivery pipeline 4 .

[0066] It is understandable that by providing the adapter 8 , the adapter 8 connects the third cavity 103 with the delivery pipeline 4 , thereby enabling the mixed gas formed by catalytic methane to be delivered from the first reactor 1 to the second reactor 2 .

[0067] In some embodiments, the device further comprises a conversion head 15, one end of the conversion head 15 is connected to the adapter 8, and the other end of the conversion head 15 is connected to the delivery pipeline 4. Specifically, the conversion head 15 is selected from a 90° conversion joint.

[0068] In some embodiments, the device further includes: a sealing cover 5 and a sealing gasket 6 , wherein the sealing cover 5 is connected to the fifth shell 201 and covers the fifth cavity 202 ; and the sealing gasket 6 is disposed between the sealing cover 5 and the fifth shell 201 .

[0069] It is understandable that by providing the sealing cover 5 to seal the fifth cavity 202 and by providing the sealing gasket 6 between the sealing cover 5 and the fifth shell 201 , the sealing performance between the sealing cover 5 and the fifth cavity 202 can be further improved.

[0070] In some embodiments, the sealing cover 5 is provided with an exhaust hole 51 , which is communicated with the fifth cavity 202 and is configured to discharge hydrogen. The device further includes an exhaust pipeline 7 connected to the exhaust hole 51 .

[0071] It can be understood that by opening the exhaust hole 51 on the sealing cover 5, the exhaust pipe 7 is connected to the fifth cavity 202 through the exhaust hole 51, and the prepared hydrogen can be discharged from the fifth cavity 202 through the exhaust hole 51 and the exhaust pipe 7 and collected.

[0072] In some embodiments, a mounting hole 52 is defined in the sealing cover 5 , and the delivery pipeline 4 passes through the mounting hole 52 and communicates with the fifth cavity 202 .

[0073] In some embodiments, the sealing cover 5 and the delivery pipeline 4 can be welded or integrally formed to ensure the sealing between the sealing cover 5 and the delivery pipeline 4 .

[0074] In some embodiments, the device further includes an air inlet 9 and an air outlet 10, wherein the air inlet 9 is provided at one end of the first reactor 1, and the air inlet 9 is connected to the third cavity 103, and the air inlet 9 is configured to introduce methane to be treated into the first reactor 1; the air outlet 10 is provided at the other end of the first reactor 1, and the air outlet 10 is connected to the third cavity 103, and the air outlet 10 is configured to discharge the mixed gas from the first reactor 1.

[0075] It can be understood that the air inlet 9 is arranged at the bottom of the first reactor 1, and the air outlet 10 is arranged at the top of the first reactor 1. The methane to be treated enters the third cavity 103 of the first reactor 1 through the air inlet 9 for catalytic treatment, which is conducive to the full catalysis of methane. Finally, the mixed gas formed by the catalytic treatment of methane is discharged from the air outlet 10.

[0076] In some embodiments, the device further includes: a gas disperser 11, which is provided with a plurality of air holes 1101. The gas disperser 11 is disposed in the third cavity 103 and close to one side of the air inlet 9. The gas disperser 11 is configured to evenly disperse the methane to be treated.

[0077] It can be understood that by arranging a gas disperser 11 on one side of the third cavity 103 near the air inlet 9, the methane to be treated can be dispersed and evenly enter the third cavity 103, which is conducive to full contact between the methane and the catalyst in the third cavity 103 and complete catalysis.

[0078] In some embodiments, the pore size, number, and distribution of the pores 1101 may be determined based on the total amount of methane gas that is actually processed.

[0079] In some embodiments, the second reactor 2 is provided with a through hole 21 , and the device further includes: a temperature measuring element 12 , which is provided in the second reactor 2 through the through hole 21 and is configured to measure the temperature inside the second reactor 2 .

[0080] It can be understood that by arranging the temperature measuring element 12 in the second reactor 2 , the temperature measuring element 12 is used to measure the temperature in the second reactor 2 , so that the cracking reaction of the mixed gas in the second reactor 2 can be monitored.

[0081] In some embodiments, the temperature measuring element 12 is selected from a thermocouple.

[0082] In some embodiments, the device further comprises: a catalyst 13 , which is disposed in the first reactor 1 and is configured to catalytically treat the methane to be treated.

[0083] It can be understood that by arranging the catalyst 13 in the first reactor 1, the catalyst 13 is used to catalytically treat the methane to be treated, thereby improving the efficiency of hydrogen production from methane.

[0084] In some embodiments, the catalyst 13 is used to catalyze methane to produce alkanes, alkenes, alkynes, etc. Specifically, the catalyst 13 is selected from at least one of nickel (Ni), platinum (Pt), and palladium (Pd).

[0085] In some embodiments, the device further includes: a heating medium 14 , which is disposed in the second reactor 2 and is configured to heat the mixed gas.

[0086] It can be understood that by arranging the heating medium 14 in the second reactor 2, the heater 3 transfers heat to the heating medium 14, making it in a molten state, and the mixed gas undergoes a cracking reaction in the heating medium 14 to form hydrogen.

[0087] In some embodiments, the gas outlet end of the delivery pipeline 4 is close to the bottom of the third cavity 103 .

[0088] It is understandable that by arranging the gas outlet end of the delivery pipeline 4 close to the bottom of the third cavity 103, the mixed gas can fully enter the heating medium 14 to undergo cracking reaction, making the cracking more complete.

[0089] In some embodiments, the temperature measuring element 12 is in contact with the heating medium 14 .

[0090] It is understood that by bringing the temperature measuring element 12 into contact with the heating medium 14 , the temperature of the molten heating medium 14 in the second reactor 2 can be monitored.

[0091] In some embodiments, the heating medium 14 is selected from at least one of metals and salts; specifically, the metal can be selected from at least one of tin, nickel, or an alloy; the salt can be selected from at least one of sodium chloride (NaCl) and potassium chloride (KCl).

[0092] In some embodiments, the mixed gas is heated to form carbon-containing compounds; specifically, the carbon-containing compounds include at least one of carbon black, graphite, carbon nanotubes, and fullerenes.

[0093] In some embodiments, the carbon-containing compound is located on a side of the heating medium 14 close to the sealing cover 5 .

[0094] It can be understood that the heater 3 transfers heat to the heating medium 14, the heating medium 14 is in a molten state, and there is a large density difference between the carbon-containing compound and the molten heating medium 14. Therefore, the carbon-containing compound moves upward and separates from the molten heating medium 14, and finally floats on the surface of the molten heating medium 14.

[0095] See Figure 5 In a second aspect, the present application provides a method for producing hydrogen from methane, using the methane hydrogen production device as described above, the method comprising:

[0096] S1: heating the first reactor 1 and the second reactor 2 using a heater 3;

[0097] S2: transporting the methane to be treated into the first reactor 1 for catalytic treatment to form a mixed gas;

[0098] S3: The mixed gas is transported to the second reactor 2 for heating treatment to form hydrogen and carbon-containing compounds.

[0099] It is understandable that the efficiency of hydrogen production from methane is improved by first catalytically treating the methane to be treated to obtain a mixed gas (intermediate product), and then heating the mixed gas to cause it to crack into hydrogen and carbon-containing compounds.

[0100] Working process:

[0101] An electric heater 3 is used to heat the first reactor 1 and the second reactor 2, so that the temperature of the first reactor 1 is 400°C and the temperature of the second reactor 2 is 800°C. The methane to be treated enters the first reactor 1 through the air inlet 9, and evenly enters the high-temperature catalyst 13 located in the third cavity 103 through the gas disperser 11. After catalytic treatment, a mixed gas is formed. The mixed gas enters the conveying pipeline 4 through the air outlet 10 and is conveyed to the second reactor 2 by the conveying pipeline 4. The mixed gas enters the molten heating medium 14 located in the fifth cavity 202, and is cracked by heating to form hydrogen and carbon-containing compounds. The hydrogen is discharged through the exhaust hole 51, and the carbon-containing compounds move upward and separate from the molten heating medium 14, and finally float on the surface of the molten heating medium 14.

[0102] In summary, the first reactor 1 can make full use of the waste heat when the heater 3 heats the second reactor 2 to complete the catalytic treatment of methane. At the same time, the first reactor 1 can also serve as an insulation layer for the heater 3, which can reduce the heat loss caused by heat exchange between the heater 3 and the surrounding environment, thereby improving energy utilization. In addition, the catalytic treatment of methane by the first reactor 1 can also improve the conversion efficiency of methane to hydrogen.

[0103] To sum up, although the embodiments of the present application are described in detail above, the above embodiments are not intended to limit the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A methane hydrogen production device, characterized in that: include: a first reactor (1), wherein the first reactor (1) is configured to catalytically treat methane to form a mixed gas; a second reactor (2), the second reactor (2) being spaced apart from the first reactor (1), and the second reactor (2) being configured to heat the mixed gas to form hydrogen; A heater (3), wherein the heater (3) comprises a first heating end (31) and a second heating end (32) facing away from the first heating end (31), the first reactor (1) is attached to the first heating end (31), the second reactor (2) is attached to the second heating end (32), the heater (3) is configured to heat the first reactor (1) and the second reactor (2), the first heating end (31) has a first heating temperature T1, the second heating end (32) has a second heating temperature T2, and the following conditions are satisfied: <T2; Wherein, the first reactor (1) is arranged around the heater (3), and the heater (3) is arranged around the second reactor (2).

2. The methane hydrogen production device according to claim 1, characterized in that: The heater (3) comprises a first shell (301) and a second shell (302); The first heating end (31) is provided on the first shell (301), the second heating end (32) is provided on the second shell (302), the first shell (301) and the second shell (302) enclose a first cavity (303), the second shell (302) encloses a second cavity (304), the first cavity (303) is configured to be provided with a heating element, and the second cavity (304) is configured to be provided with a second reactor (2).

3. The methane hydrogen production device according to claim 1, characterized in that: The first reactor (1) comprises a third shell (101) and a fourth shell (102); The third shell (101) and the fourth shell (102) enclose a third cavity (103), the fourth shell (102) encloses a fourth cavity (104), and the fourth cavity (104) is configured to accommodate the heater (3); The second reactor (2) has a fifth shell (201), the fifth shell (201) encloses a fifth cavity (202), and the third cavity (103) and the fifth cavity (202) are connected.

4. The methane hydrogen production device according to claim 3, characterized in that: The device further comprises: A delivery pipeline (4), wherein the delivery pipeline (4) is connected to the third chamber (103) and the fifth chamber (202), and the delivery pipeline (4) is configured to deliver the mixed gas from the first reactor (1) to the second reactor (2).

5. The methane hydrogen production device according to claim 4, characterized in that: The device further comprises: An adapter (8), one end of the adapter (8) is connected to the third cavity (103), and the other end of the adapter (8) is connected to the delivery pipeline (4).

6. The methane hydrogen production device according to claim 3, characterized in that: The device further comprises: a sealing cover (5), the sealing cover (5) being connected to the fifth shell (201) and covering the fifth cavity (202); A sealing gasket (6), the sealing gasket (6) being arranged between the sealing cover (5) and the fifth shell (201).

7. The methane hydrogen production device according to claim 6, characterized in that: The sealing cover (5) is provided with an exhaust hole (51), the exhaust hole (51) is in communication with the fifth cavity (202), and the exhaust hole (51) is configured to discharge the hydrogen; The device further comprises an exhaust pipeline (7), wherein the exhaust pipeline (7) is connected to the exhaust hole (51).

8. The methane hydrogen production device according to claim 3, characterized in that: The device further comprises: an air inlet (9), the air inlet (9) being provided at one end of the first reactor (1), the air inlet (9) being in communication with the third cavity (103), and the air inlet (9) being configured to introduce methane to be treated into the first reactor (1); An air outlet (10), the air outlet (10) is provided at the other end of the first reactor (1), the air outlet (10) is communicated with the third cavity (103), and the air outlet (10) is configured to discharge the mixed gas from the first reactor (1).

9. The methane hydrogen production device according to claim 8, characterized in that: The device further comprises: A gas disperser (11), wherein a plurality of air holes (1101) are provided on the gas disperser (11), and the gas disperser (11) is arranged in the third cavity (103) and close to a side of the air inlet (9), and the gas disperser (11) is configured to uniformly disperse the methane to be treated.

10. The methane hydrogen production device according to claim 1, characterized in that: The second reactor (2) is provided with a through hole (21), The device further comprises: a temperature measuring element (12), the temperature measuring element (12) being passed through the through hole (21) in the second reactor (2), and the temperature measuring element (12) being configured to measure the temperature inside the second reactor (2).

11. The methane hydrogen production device according to claim 1, characterized in that: The device further comprises: A catalyst (13) is provided in the first reactor (1), and the catalyst (13) is configured to catalytically treat the methane to be treated.

12. The methane hydrogen production device according to claim 1, characterized in that: The device further comprises: A heating medium (14), the heating medium (14) is arranged in the second reactor (2), and the heating medium (14) is configured to heat the mixed gas.

13. A method for producing hydrogen from methane, characterized in that: Using the methane hydrogen production device according to any one of claims 1 to 12, the method comprises: Using a heater (3) to heat the first reactor (1) and the second reactor (2); transporting the methane to be treated into the first reactor (1) for catalytic treatment to form a mixed gas; The mixed gas is transported to the second reactor (2) for heating to form hydrogen and carbon-containing compounds.

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