A reforming hydrogen production reactor

Abstract

The present invention relates to a reforming hydrogen production reactor, comprising a reactor, a reforming bed, a raw material pipeline, a heating structure and a heat conducting part; the reactor has a reaction chamber; the reforming bed is arranged in the reaction chamber, and the reaction chamber is divided into a combustion chamber and a preheating chamber which are interconnected, and the reforming bed is connected to a hydrogen outlet pipeline located outside the reaction chamber; the raw material pipeline is partially located in the preheating chamber, and one end extends out of the reaction chamber and the other end extends into the inner cavity of the reforming bed; the heating structure comprises a fuel pipeline and an igniter arranged in the reactor, the discharge port of the fuel pipeline is connected to the combustion chamber, and the igniter corresponds to the discharge port of the fuel pipeline, and is used to ignite the fuel transported by the fuel pipeline to generate heat; the heat conducting part corresponds to the reforming bed and the combustion chamber, and is used to conduct the heat in the combustion chamber to the reforming bed. This solution does not require additional high-cost heating equipment, has a high heat transfer efficiency, and does not require external heat source for heating, has a relatively simple structure, and saves costs.

Description

Technical Field

[0001] The invention relates to the technical field of alcohol reforming hydrogen production equipment, and in particular to a reforming hydrogen production reactor. Background Art

[0002] In recent years, the national and local support for hydrogen energy has increased, and the development prospects of the hydrogen energy industry are highly anticipated. Hydrogen energy is a green and efficient secondary energy source with the characteristics of high calorific value, abundant reserves, renewable, clean and pollution-free, diverse sources, wide application, and multiple forms of utilization. Hydrogen energy can not only provide energy, but also meet the requirements of resources, environment, and sustainable development. Fuel cells are the best way to effectively utilize hydrogen energy. They can directly convert clean hydrogen energy into electrical energy, and the reaction process only emits water and heat. It is a more advanced, more efficient, and more environmentally friendly energy conversion technology than conventional internal combustion engines.

[0003] Methanol and water vapor can produce H2 and CO2 by methanol cracking reaction and CO conversion reaction through catalyst under certain temperature and pressure conditions. The combination of methanol steam reforming technology and fuel cell technology can get rid of the dependence on hydrogen refueling stations and greatly reduce the cost of commercial operation. At the same time, using methanol as a power energy source can effectively solve the problem of my country's high dependence on foreign energy. In terms of fuel sources, my country is the country with the largest methanol production, and the main source is coal-to-methanol. Coal-to-methanol can effectively solve the problem of direct coal combustion polluting the atmosphere; secondly, methanol can also be produced from natural gas; thirdly, it can also be synthesized by recycling greenhouse gas carbon dioxide and hydrogen. In addition, hydrogen is in a gaseous state under normal conditions and needs to be converted into a liquid state under special temperature and pressure for storage and transportation, which poses certain safety hazards. In contrast, methanol is in a liquid state under normal temperature and pressure, making it easier to transport and store. Methanol steam reforming reactor, as the core equipment of methanol reforming hydrogen production technology, is the focus of current research.

[0004] For example, patent CN 105293432 A discloses a methanol-water reforming hydrogen generator and a hydrogen production method thereof, wherein a low-frequency voltage or a DC voltage is converted into a high-frequency voltage after a frequency converter to power the electromagnetic coil of an electromagnetic heater. When the electromagnetic coil is energized, a high-frequency magnetic field is generated, so that the metal of the electromagnetic heater is induced by the magnetic field to generate heat, and the temperature is provided for the reforming chamber, so that the reforming hydrogen production reaction of methanol and water is produced to produce a high-temperature mixed gas mainly composed of carbon dioxide and hydrogen. However, since the device needs to be equipped with an electromagnetic heater and corresponding supporting equipment to provide a heat source, the equipment cost is increased. Summary of the invention

[0005] In view of this, it is necessary to provide a reforming hydrogen production reactor to solve the most serious technical problems in the prior art.

[0006] The present invention provides a reforming hydrogen production reactor, which comprises:

[0007] A reactor having a reaction chamber;

[0008] A reforming bed layer is arranged in the reaction chamber and divides the reaction chamber into a combustion chamber and a preheating chamber which are interconnected. The reforming bed layer is used to reform the raw materials transported to its inner chamber and generate hydrogen, and is connected to a hydrogen outlet pipeline located outside the reaction chamber;

[0009] A raw material pipeline, partly located in the preheating chamber, with one end extending out of the reaction chamber and the other end extending into the inner cavity of the reforming bed layer, for inputting raw materials into the reforming bed layer;

[0010] A heating structure, comprising a fuel pipeline and an igniter provided in the reactor, wherein the outlet of the fuel pipeline is connected to the combustion chamber for delivering fuel into the combustion chamber, and the igniter corresponds to the outlet of the fuel pipeline for igniting the fuel delivered by the fuel pipeline to generate heat; and

[0011] The heat conducting part corresponds to the reforming bed and the combustion chamber, and is used for conducting the heat in the combustion chamber to the reforming bed.

[0012] Optionally, the reforming bed is arranged in a cylindrical shape and is spaced inward and outward from the inner wall of the reaction chamber to form the preheating chamber between the outer wall of the reforming bed and the inner wall of the reaction chamber, and the inner wall of the reforming bed is surrounded to form the combustion chamber.

[0013] Optionally, one end of the reforming bed in the axial direction is spaced apart from an inner wall corresponding to the reaction chamber to form a connecting channel, and the connecting channel connects the preheating chamber and the combustion chamber.

[0014] Optionally, the hydrogen outlet pipe and the connecting channel are located at two opposite ends of the reforming bed in the axial direction.

[0015] Optionally, the reforming hydrogen production reactor comprises a main pipe arranged outside the reactor, the main pipe is connected to the combustion chamber, and is located at two opposite ends of the reforming bed in the axial direction with the connecting channel;

[0016] The outlet of the fuel pipeline extends into the main pipeline, and the main pipeline is also connected to an air intake pipeline outside the reactor, and the connection port between the air intake pipeline and the main pipeline corresponds to the outlet of the fuel pipeline.

[0017] Optionally, the reforming hydrogen production reactor further includes a palladium alloy tube partially located in the reforming bed, one end of the palladium alloy tube extends out of the reaction chamber and is connected to the hydrogen outlet pipeline.

[0018] Optionally, the heat conducting part is a plurality of heat transfer fins connected to the outer wall of the palladium alloy tube, the plurality of heat transfer fins are arranged at intervals along the extension direction of the palladium alloy tube, and one end of each heat transfer fin is connected to a side wall of the reforming bed close to the combustion chamber.

[0019] Optionally, each of the heat transfer fins is provided with a jack for the palladium alloy tube to pass through along its thickness direction, and has a preheating heat transfer end and a combustion heat transfer end, the preheating heat transfer end is connected to a side wall of the reforming bed layer close to the preheating chamber, and the combustion heat transfer end is connected to a side wall of the reforming bed layer close to the combustion chamber; and / or,

[0020] There are a plurality of palladium alloy tubes, and the plurality of palladium alloy tubes are arranged at intervals in a circumference; and / or,

[0021] The connection between each heat transfer fin and the palladium alloy tube is coated with thermal conductive silicone grease.

[0022] Optionally, the reforming hydrogen production reactor further comprises a tail gas pipeline arranged in the reactor, one end of the tail gas pipeline is connected to the inner cavity of the reforming bed layer, and the other end extends into the combustion chamber.

[0023] Optionally, a plurality of air holes are provided at one end of the exhaust gas pipe extending into the combustion chamber.

[0024] Compared with the prior art, in the reforming hydrogen production reactor provided by the present invention, the reaction chamber is divided into a combustion chamber and a preheating chamber by a reforming bed, and fuel (methanol fuel) is transported to the combustion chamber by a fuel pipeline. After the igniter ignites the methanol fuel, the methanol fuel burns in the combustion chamber and releases a large amount of heat; part of the heat generated in the combustion chamber is diffused with the flue gas to the preheating chamber connected thereto, so as to heat the raw material pipeline located in the preheating chamber, so that the raw material (methanol aqueous solution) in the raw material pipeline is vaporized into methanol water vapor; the other part is transferred to the reforming bed via the heat conducting part, so as to adjust the temperature in the reforming bed to a suitable temperature, so that the methanol water vapor transported to the reforming bed can undergo a reforming reaction and generate hydrogen, and the generated hydrogen is discharged and collected via the hydrogen outlet pipeline.

[0025] Therefore, this solution does not require additional high-cost heating equipment, but instead transfers the heat generated by the combustion of methanol fuel in the combustion chamber to the preheating chamber and the reforming bed so that the temperatures of the two can be adjusted to appropriate temperatures. Since the combustion chamber is directly connected to the preheating chamber and a heat conducting part is provided between the combustion chamber and the reforming bed, the heat in the combustion chamber can be effectively transferred to the preheating chamber and the reforming bed, and the heat transfer efficiency is high. At the same time, no external heat source is required for heating, and the structure is relatively simple and compact, which saves costs.

[0026] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail as follows with reference to the accompanying drawings. The specific implementation of the present invention is given in detail by the following embodiments and their accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0028] Figure 1 A schematic structural diagram of an embodiment of a reforming hydrogen production reactor provided by the present invention;

[0029] Figure 2 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0030] Figure 3 It is an enlarged schematic diagram of point B in the figure;

[0031] Figure 4 for Figure 2 Schematic diagram of the cross section of the middle CC plane;

[0032] Figure 5 for Figure 4 Schematic diagram of the structure of the heat transfer fin.

[0033] Description of reference numerals:

[0034] 100-reforming hydrogen production reactor, 1-reactor, 1a-reaction chamber, 1a1-combustion chamber, 1a2-preheating chamber, 1a3-connecting channel, 11-end, 12-seat, 2-reforming bed, 21-hydrogen outlet pipeline, 22-raw material pipeline, 221-main section, 222-feeding section, 3-heating structure, 31-fuel pipeline, 32-igniter, 4-heat conduction part, 41-heat transfer fins, 41a-socket, 411-preheating heat transfer end, 412-combustion heat transfer end, 5-preheating exhaust pipeline, 6-main pipeline, 61-intake pipeline, 7-palladium alloy tube, 8-exhaust pipeline, 8a-air vent, 9-bolt. DETAILED DESCRIPTION

[0035] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0036] See also Figures 1 to 4 The reforming hydrogen production reactor 100 includes a reactor 1, a reforming bed 2, a raw material pipeline 22, a heating structure 3 and a heat conducting part 4; the reactor 1 has a reaction chamber 1a; the reforming bed 2 is arranged in the reaction chamber 1a, and the reaction chamber 1a is divided into a combustion chamber 1a1 and a preheating chamber 1a2 which are interconnected, the reforming bed 2 is used to make the raw material transported to its inner chamber undergo a reforming reaction and generate hydrogen, and is connected to a hydrogen outlet pipeline 21 located outside the reaction chamber 1a; the raw material pipeline 22 is partially located in the preheating chamber 1a2, and one end extends out of the reaction chamber 1 a, and the other end extends into the inner cavity of the reforming bed 2, so as to input raw materials into the reforming bed 2; the heating structure 3 includes a fuel pipeline 31 and an igniter 32 arranged in the reactor 1, the discharge port of the fuel pipeline 31 is connected to the combustion chamber 1a1, so as to transport fuel into the combustion chamber 1a1, and the igniter 32 corresponds to the discharge port of the fuel pipeline 31, so as to ignite the fuel transported by the fuel pipeline 31 to generate heat; the heat conducting part 4 corresponds to the reforming bed 2 and the combustion chamber 1a1, so as to conduct the heat in the combustion chamber 1a1 to the reforming bed 2.

[0037] In the reforming hydrogen production reactor 100 provided by the present invention, the reaction chamber 1a is divided into a combustion chamber 1a1 and a preheating chamber 1a2 by the reforming bed 2, and the fuel (methanol fuel) is transported into the combustion chamber 1a1 by the fuel pipeline 31. After the igniter 32 ignites the methanol fuel, the methanol fuel burns in the combustion chamber 1a1 and releases a large amount of heat; part of the heat generated in the combustion chamber 1a1 is diffused into the preheating chamber 1a2 connected thereto along with the flue gas, so as to heat the raw material pipeline 22 located in the preheating chamber 1a2, so that the raw material (methanol aqueous solution) in the raw material pipeline 22 is vaporized into methanol water vapor; the other part is transferred to the reforming bed 2 via the heat conducting part 4, so as to adjust the temperature in the reforming bed 2 to a suitable temperature, so that the methanol water vapor transported to the reforming bed 2 can undergo a reforming reaction and generate hydrogen, and the generated hydrogen is discharged and collected via the hydrogen outlet pipeline 21.

[0038] Therefore, the present solution does not require additional, relatively expensive heating equipment. Instead, the heat generated by the combustion of methanol fuel in the combustion chamber 1a1 is transferred to the preheating chamber 1a2 and the reforming bed 2 so that the temperatures of both can be adjusted to appropriate temperatures. Since the combustion chamber 1a1 is directly connected to the preheating chamber 1a2 and a heat conducting portion 4 is provided between the combustion chamber 1a1 and the reforming bed 2, the heat in the combustion chamber 1a1 can be effectively transferred to the preheating chamber 1a2 and the reforming bed 2. The heat transfer efficiency is relatively high, and no external heat source is required for heating. The structure is relatively simple and cost-saving.

[0039] It should be noted that, in this embodiment, the reforming bed 2 contains a methanol reforming catalyst, which is evenly filled in the reforming bed 2. A complete metal honeycomb substrate is used, and the catalyst is loaded on the substrate wall in the form of a coating. The preferred substrate is FeCrAl alloy, the coating is Ce0.8Zr0.2O2, and the preferred reaction temperature is 400-450°C. The integral metal honeycomb substrate catalyst layer utilizes a high thermal conductivity alloy substrate and a porous structure, and has the characteristics of reduced bed pressure, uniform material and temperature distribution, large reaction area, and good thermal stability.

[0040] In addition, the raw material pipeline 22 is arranged in the form of a coil to improve the heat transfer efficiency. Preferably, the raw material pipeline 22 is formed by spirally winding a seamless stainless steel pipe, and preferably laser welding or high-frequency welding is used to weld fins on the outer surface of the coil. Specifically, the raw material pipeline 22 includes a main body section 221 arranged in a coil, and a plurality of feed sections 222 connected to the main body section 221, and the plurality of feed sections 222 are arranged at intervals in a circle and connected to the reforming bed 2.

[0041] In addition, the discharge port of the fuel pipe 31 is provided with a solid cone wide-angle nozzle, and the preferred spray angle is 120-130 degrees. The igniter 32 includes an ignition rod and a semiconductor nozzle arranged on the ignition rod, and the semiconductor nozzle forms a high-energy arc spark to ignite, and the preferred ignition frequency is 6-12 times / s.

[0042] Furthermore, the reforming bed 2 is provided in a cylindrical shape, and is spaced apart from the inner wall of the reaction chamber 1a in the inner and outer directions, so as to form a preheating chamber 1a2 between the outer wall of the reforming bed 2 and the inner wall of the reaction chamber 1a, and the inner wall of the reforming bed 2 is surrounded to form a combustion chamber 1a1. That is, in this embodiment, the combustion chamber 1a1 is located in the inner circle of the reforming bed 2, and the preheating chamber 1a2 is located between the outer circle of the reforming bed 2 and the inner wall of the reaction chamber 1a, so that the overall structure of the reactor 1 is more compact and reasonable. And the reforming bed 2 surrounds the combustion chamber 1a1, so that heat transfer can be better carried out between the two, thereby improving the heat transfer efficiency. It should be noted that in the scheme, the preheating chamber 1a2 is connected to a preheating exhaust pipe 5 provided in the reactor 1 to discharge the combustion flue gas in time.

[0043] Furthermore, in the present embodiment, one end of the reforming bed 2 in the axial direction is spaced apart from the inner wall corresponding to the reaction chamber 1a to form a connecting channel 1a3, and the connecting channel 1a3 connects the preheating chamber 1a2 and the combustion chamber 1a1. In this way, by spacing apart one end of the reforming bed 2 in the axial direction from the inner wall corresponding to the reaction chamber 1a, the preheating chamber 1a2 and the combustion chamber 1a1 are connected without the need to add additional pipelines, thereby saving costs. Specifically, the hydrogen outlet pipeline 21 and the connecting channel 1a3 are located at opposite ends of the reforming bed 2 in the axial direction. In this solution, the hydrogen outlet pipeline 21 and the connecting channel 1a3 are arranged relative to each other to avoid interference between the connecting pipelines of the reforming bed 2 and the hydrogen outlet pipeline 21, so that the overall spatial arrangement is more compact and reasonable.

[0044] Furthermore, the reforming hydrogen production reactor 100 includes a main pipe 6 disposed outside the reactor 1, the main pipe 6 is connected to the combustion chamber 1a1, and is located at two ends of the reforming bed 2 that are opposite in the axial direction to the connecting channel 1a3; wherein the discharge port of the fuel pipe 31 extends into the main pipe 6, and the main pipe 6 is also connected to an air intake pipe 61 located outside the reactor 1, and the connection port of the air intake pipe 61 and the main pipe 6 corresponds to the discharge port of the fuel pipe 31. It should be noted that, in this embodiment, the main pipe 6 is connected to the combustion chamber 1a1, increasing the volume of the combustion chamber 1a1 and expanding the combustion space; at the same time, the air intake pipe 61 is connected to the main pipe 6, so that the combustion agent (air) can be input in time. In this solution, the igniter 32 is arranged on the side wall of the main pipe 6.

[0045] Furthermore, the reforming hydrogen production reactor 100 further includes a palladium alloy tube 7 partially located in the reforming bed 2, one end of the palladium alloy tube 7 extends out of the reaction chamber 1a and is connected to the hydrogen outlet pipeline 21. In this solution, by virtue of the characteristics of the palladium alloy tube 7 for purifying hydrogen, the hydrogen-rich gas generated by the reforming reaction in the reforming bed 2 passes through the palladium alloy tube 7 to obtain ultrapure hydrogen, and the ultrapure hydrogen flows through the palladium alloy tube 7 to the hydrogen outlet pipeline 21 for collection.

[0046] It should be noted that the upper section of the palladium alloy tube 7 is closed and the lower end is open, and ultrapure hydrogen is obtained by utilizing the "adsorption dissociation-composite desorption" reaction of hydrogen on the surface of the palladium alloy. The material of the palladium alloy tube 7 is preferably PdAg, PdCu or PdAgAuNi alloy, preferably with a diameter of 2~4mm and a wall thickness of 50~100μm.

[0047] For further information, see Figure 4 and Figure 5, the heat conducting part 4 is a plurality of heat transfer fins 41 connected to the outer wall of the palladium alloy tube 7, and the plurality of heat transfer fins 41 are arranged at intervals along the extension direction of the palladium alloy tube 7, and one end of each heat transfer fin 41 is connected to a side wall of the reforming bed 2 close to the combustion chamber 1a1. In this way, on the one hand, the heat in the combustion chamber 1a1 can be evenly diffused in the reforming bed 2, and on the other hand, the heat transfer fins 41 can directly transfer the heat in the combustion chamber 1a1 to the palladium alloy tube 7, so that the palladium alloy tube 7 can be at a suitable temperature, thereby purifying the hydrogen. In this embodiment, the palladium alloy tube 7 is arranged to extend along the axial direction of the reforming bed 2, and the plurality of heat transfer fins 41 are arranged at intervals along the extension direction of the palladium alloy tube 7, so as to further ensure the heat transfer effect of the reforming bed 2 and the palladium alloy tube 7, thereby improving the quality of the product hydrogen.

[0048] Furthermore, each heat transfer fin 41 is provided with a socket 41a for the palladium alloy tube 7 to pass through along its thickness direction, and has a preheating heat transfer end 411 and a combustion heat transfer end 412, the preheating heat transfer end 411 is connected to a side wall of the reforming bed 2 close to the preheating chamber 1a2, and the combustion heat transfer end 412 is connected to a side wall of the reforming bed 2 close to the combustion chamber 1a1; and / or, a plurality of palladium alloy tubes 7 are provided, and the plurality of palladium alloy tubes 7 are arranged at intervals in a circle; and / or, the connection between each heat transfer fin 41 and the palladium alloy tube 7 is coated with thermal conductive silicone grease. In this embodiment, each heat transfer fin 41 is arranged in a circular ring, and the outer side thereof is the preheating heat transfer end 411, and the inner side is the combustion heat transfer end 412, so as to make full use of the heat in the combustion chamber 1a1 and the preheating chamber 1a2, and make the overall structure more compact while achieving heat transfer. At the same time, thermal conductive silicone grease is coated at the connection between each heat transfer fin 41 and the palladium alloy tube 7 to improve the overall heat transfer coefficient. In addition, a plurality of palladium alloy tubes 7 are provided to improve the hydrogen collection efficiency, and correspondingly, a plurality of insertion holes 41 a are provided on each heat transfer fin 41 .

[0049] Furthermore, in one embodiment, the reforming hydrogen production reactor 100 further includes a tail gas pipeline 8 provided in the reactor 1, one end of the tail gas pipeline 8 is connected to the inner cavity of the reforming bed 2, and the other end extends into the combustion chamber 1a1. In this way, part of the hydrogen in the hydrogen-rich gas that fails to pass through the palladium alloy tube 7 is transported to the combustion chamber 1a1 through the tail gas pipeline 8 together with other impurity gases to undergo a combustion reaction, generate high-temperature flue gas, provide heat for the methanol reforming reaction, vaporization of methanol aqueous solution and purification of the palladium alloy tube 7, and improve the overall thermal efficiency.

[0050] Furthermore, one end of the tail gas pipe 8 extending into the combustion chamber 1a1 is provided with a plurality of air holes 8a, so that part of the hydrogen and other impurity gases that cannot pass through the palladium alloy tube 7 can flow into the combustion chamber 1a1 evenly through the air holes 8a, so that they can be fully burned. Specifically, there are a plurality of tail gas pipes 8, and the plurality of tail gas pipes 8 are arranged at intervals in a circle, and the portion of each tail gas pipe in the combustion chamber 1a1 is evenly distributed with air holes 8a, so as to ensure that the hydrogen-containing tail gas can be evenly burned in the combustion chamber 1a1.

[0051] It should be noted that, in the present embodiment, one end of the tail gas pipeline 8 is connected to the reforming bed 2, and the other end extends into the main pipeline 6. In addition, in the present scheme, the reactor 1 includes a head 11 and a base 12, and the head 11 and the base 12 are jointly arranged to form a reaction chamber 1a, and the head 11 and the base 12 are detachably connected by bolts 9. Correspondingly, the structure of the reforming bed 2 can also be similarly configured. In this way, when faults such as decreased catalyst activity and leakage of the palladium alloy tube 7 occur, and it is necessary to shut down for maintenance or replace parts, the head of the reactor 1 and the head of the reforming bed 2 can be removed in turn to repair or replace the overall catalyst and the palladium alloy tube 7, thereby improving the full cycle life of the reactor.

[0052] Based on the above structure, the specific working process of the reforming hydrogen production reactor 100 provided by the present invention is as follows:

[0053] When the reforming hydrogen production reactor 100 is working, methanol fuel is transported to the combustion chamber 1a1 through the fuel pipeline 31, and enters the combustion chamber 1a1 after being atomized by the nozzle at the outlet of the fuel pipeline 31. At the same time, air is transported to the combustion chamber 1a1 through the air intake pipeline 61, and the igniter 32 is energized to ignite the mixed methanol and air.

[0054] The heat of the generated high-temperature flue gas is transferred from the combustion chamber 1a1 and the heat transfer fins 41 to the reforming bed 2 and the palladium alloy tube 7, and the tail gas is preheated; the high-temperature flue gas further enters the preheating chamber 1a2 through the connecting channel 1a3 to heat the raw material pipeline 22 located in the preheating chamber 1a2. At this time, the methanol aqueous solution is input from the inlet of the raw material pipeline 22, and the methanol aqueous solution in the raw material pipeline 22 is completely vaporized into methanol water vapor by the high-temperature flue gas. At the same time, the high-temperature flue gas in the preheating chamber 1a2 further heats the reforming bed 2, and after the heat of the high-temperature flue gas is fully utilized, it is discharged from the preheating exhaust pipe 5.

[0055] Methanol vapor enters the reforming bed 2 through the raw material pipeline 22, and a methanol vapor reforming reaction occurs in the bed that has reached the optimal reaction temperature. The product gas passes through the palladium alloy tube 7 to obtain ultra-pure hydrogen, which flows from the palladium alloy tube 7 to the hydrogen outlet pipeline 21 for collection to be used in the fuel cell power generation system.

[0056] Part of the hydrogen in the product gas that does not pass through the palladium alloy tube 7 enters the combustion chamber 1a1 through the tail gas pipe 8 together with other impurity gases, and is evenly sprayed into the combustion chamber 1a1 through the air holes 8a evenly distributed on the upper part of the tail gas pipe 8 to undergo a combustion reaction, generating high-temperature flue gas, which provides heat for the methanol reforming reaction, the vaporization of the methanol aqueous solution and the purification of the palladium alloy tube 7, thereby improving the overall thermal efficiency of the reactor.

[0057] In one embodiment, methanol fuel enters the combustion chamber 1a1 from the fuel pipe 31, and the upper part of the fuel pipe 31 is a solid cone wide-angle nozzle with a spray angle of 120°; air enters the combustion chamber 1a1 from the air intake pipe 61, and the igniter 32 ignites, with an ignition frequency of 6 times / s, and the methanol fuel burns in the combustion chamber 1a1. When the temperature of the reforming bed 2 rises to 380°C, a methanol aqueous solution is introduced into the raw material pipe 22, and the molar ratio of methanol to water is 1:1.1. The methanol aqueous solution is vaporized into methanol water vapor in the raw material pipe 22, and the methanol water vapor enters the reforming bed 2 for reforming reaction. The matrix of the catalyst in the reforming bed 2 is a honeycomb FeCrAl alloy, with Ce0.8Zr0.2O2 as a coating, and the reaction temperature is 400°C. The palladium alloy tube 7 is made of PdAg alloy, with a diameter of 2mm, a wall thickness of 50μm, and 16 roots. The temperature of the palladium alloy tube 7 is 400°C. After the reforming hydrogen production reactor 100 is stably operated, the product hydrogen pressure is measured to be ≥0.25Mpa, and the purity is ≥99.99999%, which meets the use requirements of the fuel cell power generation system.

[0058] In another embodiment, methanol fuel enters the combustion chamber 1a1 from the fuel pipe 31, and the upper part of the fuel pipe 31 is a solid cone wide-angle nozzle with a spray angle of 130°; air enters the combustion chamber 1a1 from the air intake pipe 61, and the igniter 32 ignites, with an ignition frequency of 12 times / s, and the methanol fuel burns in the combustion chamber 1a1. When the temperature of the reforming bed 2 rises to 400°C, a methanol aqueous solution is introduced into the raw material pipe 22, and the molar ratio of methanol to water is 1:1.2. The methanol aqueous solution is vaporized into methanol water vapor in the raw material pipe 22, and the methanol water vapor enters the reforming bed 2 to undergo a reforming reaction. The matrix of the catalyst in the reforming bed 2 is a honeycomb FeCrAl alloy, with a coating of Ce0.8Zr0.2O2, and a reaction temperature of 450°C. The palladium alloy tube 7 is made of PdAg alloy, with a diameter of 2mm, a wall thickness of 50μm, and 16 roots. The temperature of the palladium alloy tube 7 is 450°C. After the reforming hydrogen production reactor 100 is stably operated, the product hydrogen pressure is measured to be ≥0.3Mpa, and the purity is ≥99.99999%, which meets the use requirements of the fuel cell power generation system.

[0059] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A reforming hydrogen production reactor, characterized in that: It includes: A reactor having a reaction chamber; A reforming bed layer is arranged in the reaction chamber and divides the reaction chamber into a combustion chamber and a preheating chamber which are interconnected. The reforming bed layer is used to reform the raw materials transported to its inner chamber and generate hydrogen, and is connected to a hydrogen outlet pipeline located outside the reaction chamber; A raw material pipeline, partly located in the preheating chamber, with one end extending out of the reaction chamber and the other end extending into the inner cavity of the reforming bed layer, for inputting raw materials into the reforming bed layer; A heating structure, comprising a fuel pipeline and an igniter provided in the reactor, wherein the outlet of the fuel pipeline is connected to the combustion chamber for delivering fuel into the combustion chamber, and the igniter corresponds to the outlet of the fuel pipeline for igniting the fuel delivered by the fuel pipeline to generate heat; and a heat conducting portion, corresponding to the reforming bed and the combustion chamber, for conducting heat in the combustion chamber to the reforming bed; Wherein, the reforming hydrogen production reactor further includes a palladium alloy tube partially located in the reforming bed layer, one end of the palladium alloy tube extends out of the reaction chamber and is connected to the hydrogen outlet pipeline; The heat conducting part is a plurality of heat transfer fins connected to the outer wall of the palladium alloy tube. The plurality of heat transfer fins are arranged at intervals along the extension direction of the palladium alloy tube, and one end of each heat transfer fin is connected to a side wall of the reforming bed close to the combustion chamber.

2. The reforming hydrogen production reactor according to claim 1, characterized in that: The reforming bed is arranged in a cylindrical shape and is spaced apart from the inner wall of the reaction chamber in the inward and outward directions to form the preheating chamber between the outer wall of the reforming bed and the inner wall of the reaction chamber, and the inner wall of the reforming bed is surrounded to form the combustion chamber.

3. The reforming hydrogen production reactor according to claim 2, characterized in that: One end of the reforming bed in the axial direction is spaced apart from the inner wall corresponding to the reaction chamber to form a connecting channel, and the connecting channel connects the preheating chamber and the combustion chamber.

4. The reforming hydrogen production reactor according to claim 3, characterized in that: The hydrogen outlet pipe and the connecting channel are located at two opposite ends of the reforming bed in the axial direction.

5. The reforming hydrogen production reactor according to claim 3, characterized in that: The reforming hydrogen production reactor comprises a main pipe arranged outside the reactor, the main pipe is connected to the combustion chamber, and is located at two opposite ends of the reforming bed in the axial direction with the connecting channel; The outlet of the fuel pipeline extends into the main pipeline, and the main pipeline is also connected to an air intake pipeline outside the reactor, and the connection port between the air intake pipeline and the main pipeline corresponds to the outlet of the fuel pipeline.

6. The reforming hydrogen production reactor according to claim 1, characterized in that: Each of the heat transfer fins is provided with a plug hole for the palladium alloy tube to pass through along the thickness direction thereof, and has a preheating heat transfer end and a combustion heat transfer end, wherein the preheating heat transfer end is connected to a side wall of the reforming bed layer close to the preheating chamber, and the combustion heat transfer end is connected to a side wall of the reforming bed layer close to the combustion chamber; and / or, There are a plurality of palladium alloy tubes, and the plurality of palladium alloy tubes are arranged at intervals in a circumference; and / or, The connection between each heat transfer fin and the palladium alloy tube is coated with thermal conductive silicone grease.

7. The reforming hydrogen production reactor according to claim 1, characterized in that: The reforming hydrogen production reactor further comprises a tail gas pipeline arranged in the reactor, one end of the tail gas pipeline is connected to the inner cavity of the reforming bed layer, and the other end of the tail gas pipeline extends into the combustion chamber.

8. The reforming hydrogen production reactor according to claim 7, characterized in that: One end of the tail gas pipeline extending into the combustion chamber is provided with a plurality of air holes.

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