Modularized methanol reforming hydrogen production system

Abstract

The invention relates to a modular methanol reforming hydrogen production system, and belongs to the technical field of new energy of methanol reforming hydrogen production. The hydrogen production system comprises a control system, an air inlet module, a methanol supply module, a plurality of methanol reforming hydrogen production modules, a reformed gas main pipeline and a tail gas main pipeline, wherein the methanol reforming hydrogen production module comprises a methanol reformer, a tail gas heat exchanger, a methanol evaporator, a methanol aqueous solution sub-feeding pump, a methanol aqueous solution sub-pipeline, a reformed gas sub-pipeline and a tail gas sub-pipeline; the methanol reformer comprises a vaporizing chamber, an oxidizing chamber and a reforming chamber; an outlet of high-temperature tail gas generated by the oxidizing chamber is connected with the tail gas heat exchanger and the methanol evaporator; and the methanol aqueous solution main storage tank is sequentially connected with the methanol evaporator, the tail gas heat exchanger and the reforming chamber through a methanol aqueous solution feeding pump. The methanol reforming hydrogen production system adopts a modular design, is simple in equipment, high in expansibility, quick to start and adjustable in hydrogen production amount, and realizes instant production and instant use of hydrogen energy and hydrogen.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of new energy technology of methanol reforming hydrogen production, in particular to a modular methanol reforming hydrogen production system. BACKGROUND

[0002] Hydrogen energy is a new type of energy with wide sources, clean and low carbon, flexible and efficient, and rich application scenarios, has unique advantages of storage and power generation, and is one of the best solutions to realize large-scale cross-seasonal storage and transportation of renewable energy. However, the hydrogen gas as a hydrogen energy carrier has the problems of production, storage and transportation. Methanol has the highest hydrogen-carbon ratio, and its liquid storage and filling process is very convenient, which is an important high-density hydrogen storage carrier. Using methanol as a hydrogen source for on-site hydrogen production can realize hydrogen production and use, and its intrinsic safety is better than traditional high-pressure gaseous hydrogen source and hydrogen filling station.

[0003] At present, methanol hydrogen production technologies mainly include methanol cracking hydrogen production, methanol partial oxidation reforming hydrogen production, methanol autothermal reforming hydrogen production, and methanol steam reforming hydrogen production. Among them, the methanol steam reforming hydrogen production technology has high hydrogen yield (the proportion of hydrogen in the product can be close to 75%), reasonable energy utilization, and simple process control, and is widely used in the industrial field.

[0004] However, the current methanol hydrogen production technology has the disadvantages of slow start, long time consumption and high energy consumption. Therefore, small-sized methanol reforming hydrogen production modules are integrated to form a large-scale modular methanol reforming hydrogen production technology suitable for modular power generation. Each small-sized hydrogen production module can be started at the same time, so as to shorten the start-up time of the whole large-scale modular methanol reforming hydrogen production system and reduce the start-up energy consumption of the whole hydrogen production system. SUMMARY

[0005] In order to avoid the problems of hydrogen production, storage and transportation as a hydrogen energy carrier, and the disadvantages of slow start and long time consumption of the existing methanol hydrogen production technology, the present application designs a modular methanol reforming hydrogen production system, which adopts modular design, is relatively flexible, has simple equipment, strong expandability, fast start, adjustable hydrogen production amount, effectively avoids the problems of hydrogen production, storage and transportation and the disadvantages of slow start and long time consumption, and realizes the production and use of hydrogen energy and hydrogen gas.

[0006] In order to achieve the above purpose, the following technical scheme is adopted in the present application.

[0007] A modular methanol reforming hydrogen production system, comprising a control system, an air inlet module, a methanol supply module, a plurality of methanol reforming hydrogen production modules, a reforming gas main pipeline for hydrogen supply and a tail gas main pipeline for heat supply; wherein the fuel supply system comprises a methanol aqueous solution main tank, a methanol aqueous solution main pipeline and a methanol aqueous solution feed pump; the methanol aqueous solution main tank is connected with the methanol aqueous solution feed pump through the methanol aqueous solution main pipeline;

[0008] The methanol reforming hydrogen production module comprises a methanol reformer, a tail gas heat exchanger, a methanol evaporator, a methanol aqueous solution sub-feed pump, a methanol aqueous solution sub-pipe, a reforming gas sub-pipe, a tail gas sub-pipe and a switching power supply;

[0009] The methanol aqueous solution main pipe is connected with the methanol aqueous solution sub-pipe of any one of the plurality of methanol reforming hydrogen production modules respectively; the reforming gas sub-pipe is connected with the reforming gas main pipe respectively, and the tail gas sub-pipe is connected with the tail gas main pipe respectively;

[0010] In the methanol reforming hydrogen production module, the methanol reformer comprises a vaporization chamber, an oxidation chamber and a reforming chamber, the oxidation chamber generates high-temperature tail gas by catalytic oxidation of methanol, and the reforming chamber generates hydrogen by reforming of methanol and water; the outlet of the high-temperature tail gas in the methanol reformer is sequentially connected with the tail gas heat exchanger and the methanol evaporator, and the methanol aqueous solution main tank is sequentially connected with the methanol evaporator, the tail gas heat exchanger and the reforming chamber through a methanol aqueous solution feed pump.

[0011] In the present application, the methanol reformer can adopt a conventional methanol reformer in the art, and the structure thereof is not specifically introduced in the present application. The outlet of the high-temperature tail gas of the methanol reformer is connected with the tail gas heat exchanger through a tail gas sub-pipe, and the methanol aqueous solution main tank is sequentially connected with the tail gas heat exchanger and the reforming chamber through a methanol aqueous solution feed pump. In the tail gas heat exchanger, heat exchange occurs between the high-temperature tail gas and the methanol aqueous solution, so that the temperature of the methanol aqueous solution is increased and the temperature of the high-temperature tail gas is decreased; the cooled high-temperature tail gas can still be used for heating or heat supply for users, and the waste heat of the tail gas is recycled.

[0012] In the present application, the modular methanol reforming hydrogen production system is highly integrated by a plurality of independent methanol reforming hydrogen production modules. As an embodiment in the present application, the methanol aqueous solution main pipe is connected with the methanol aqueous solution sub-pipe of each hydrogen production module, the reforming gas sub-pipe of each hydrogen production module is connected with the reforming gas main pipe, and the tail gas pipe of each hydrogen production module is connected with the tail gas main pipe; the methanol aqueous solution passes through the methanol aqueous solution main pipe, enters each independent methanol reforming hydrogen production module to reform and produce hydrogen, the reforming hydrogen produced by each hydrogen production module is collected into the reforming gas main pipe and used for hydrogen supply for users, and the tail gas discharged by each hydrogen production module is collected into the tail gas main pipe and used for heat supply for users. In the methanol reforming hydrogen production module, the tail gas outlet of the methanol reformer is connected with the tail gas heat exchanger and then connected with the methanol evaporator, forming a two-stage heat exchange structure and performing multi-stage heat recovery, which is conducive to improving the waste heat utilization rate and energy conversion efficiency of the tail gas of the small hydrogen production module.

[0013] Optionally, the air intake system comprises an air pipe and a fan, and the air inlet of the methanol reformer is connected with the fan through the air pipe.

[0014] Optionally, the outlet of the high-temperature tail gas in the methanol reformer is connected with the tail gas heat exchanger and the methanol evaporator in sequence through a tail gas sub-pipe, and then connected with a tail gas main pipe for heat supply, and finally passes through the heat exchanger or the heating device for heat supply to the user end.

[0015] Optionally, the methanol reforming hydrogen production module further comprises a methanol aqueous solution sub-tank, and the methanol aqueous solution main tank is connected with the methanol aqueous solution sub-tank through the methanol aqueous solution main pipe, for conveying the methanol aqueous solution in the methanol aqueous solution main tank to the methanol aqueous solution sub-tank.

[0016] Optionally, the methanol aqueous solution inlet for oxidation (i.e., the methanol aqueous solution inlet into the oxidation chamber) of the methanol reformer is connected with the methanol aqueous solution sub-feed pump through a methanol aqueous solution sub-pipe.

[0017] The methanol aqueous solution inlet for reforming (i.e., the methanol aqueous solution inlet into the reformer chamber) of the methanol reformer is connected with the tail gas heat exchanger, the methanol evaporator and the methanol aqueous solution sub-feed pump in sequence through a methanol aqueous solution sub-pipe.

[0018] In the present application, the methanol aqueous solution inlet for reforming of the methanol reformer is connected with the tail gas heat exchanger, the methanol evaporator and the methanol aqueous solution sub-feed pump in sequence, the methanol aqueous solution is pumped by the methanol aqueous solution sub-feed pump into the methanol evaporator and the tail gas heat exchanger to exchange heat with the high-temperature tail gas from the methanol reformer, and then enters the reforming chamber of the methanol reformer to participate in the methanol water catalytic reforming reaction, which is conducive to the rapid start-up of the system in the start-up stage.

[0019] Optionally, the tail gas outlet temperature of the oxidation chamber is 400-450℃, and the reforming hydrogen temperature of the reforming chamber is 150-200℃.

[0020] In the present application, the methanol catalytic oxidation reaction occurs in the oxidation chamber of the methanol reformer, the methanol aqueous solution is conveyed into the oxidation chamber of the methanol reformer by the methanol pump, releases a large amount of heat after catalytic oxidation, and supplies the temperature required for the catalytic reforming reaction in the reforming chamber of the methanol reformer and the temperature of the vaporization chamber, so as to vaporize the liquid methanol aqueous solution, and the tail gas outlet temperature of the oxidation chamber is generally maintained at 400-450℃, which can be used for heat supply and heating. The methanol water reforming reaction occurs in the reforming chamber of the methanol reformer, the methanol aqueous solution is conveyed into the methanol evaporator by the methanol pump, vaporized again in the vaporization chamber of the methanol reformer, and finally enters the reforming chamber of the methanol reformer to occur the methanol water catalytic reforming reaction, and the reforming hydrogen temperature is about 150-200℃.

[0021] Optionally, the control system comprises a PLC module, which controls the air fan in the air inlet module, the methanol aqueous solution feed pump in the methanol supply module, and the methanol reformer and the methanol aqueous solution sub-feed pump in the methanol reforming hydrogen production module.

[0022] In the present application, the control system uses a PLC controller to control the entire modular methanol reforming hydrogen production system. The process parameters can be displayed on the touch screen, and have a one-key start function, and can display fault codes and other information. The control range of the control system includes the pressure, temperature, and electric heating monitoring circuits of all devices in the entire device boundary.

[0023] Optionally, the control system further comprises a safety module, wherein the safety module comprises a temperature alarm function. By setting a temperature alarm value, if the actual temperature exceeds the alarm value, an emergency protection mode is started, the methanol supply is closed, and the fan operates at full power to ensure that heat is discharged from the entire device in a timely manner to achieve the purpose of rapid cooling.

[0024] Optionally, the methanol reformer, the tail gas heat exchanger, and the methanol evaporator are made of aluminum alloy or stainless steel, which is beneficial to heat transfer and improves the heat exchange efficiency. In addition, aluminum alloy or stainless steel has the advantages of light weight, easy machining, and easy integration.

[0025] In the present application, the tail gas heat exchanger is a component that uses the high-temperature tail gas discharged from the oxidation chamber of the methanol reformer to heat the liquid methanol aqueous solution. The purpose is to utilize the waste heat of the tail gas, reduce heat loss, and improve energy conversion efficiency. The methanol evaporator is a component that uses the high-temperature tail gas discharged from the tail gas heat exchanger to heat the liquid methanol aqueous solution. The purpose is to vaporize the liquid methanol aqueous solution, which means to utilize the waste heat of the tail gas, reduce heat loss, and improve energy conversion efficiency.

[0026] Optionally, the tail gas heat exchanger is connected to the methanol reformer through a fluororubber sealing ring.

[0027] Optionally, the methanol evaporator is connected to the tail gas heat exchanger through a fluororubber sealing ring.

[0028] Optionally, the plurality of methanol reforming hydrogen production modules are sealed and connected to the methanol aqueous solution main pipeline, the reforming gas main pipeline, and the tail gas main pipeline through high-temperature resistant sealing rings.

[0029] Optionally, the methanol reformer, the tail gas heat exchanger, and the methanol evaporator constitute an integral whole, and each main pipeline (including the methanol aqueous solution main pipeline, the reforming gas main pipeline, and the tail gas main pipeline) and sub-pipeline (including the methanol aqueous solution sub-pipeline, the reforming gas sub-pipeline, and the tail gas sub-pipeline) are insulated with insulation cotton or heat insulation sleeves to reduce heat loss.

[0030] Optionally, the modular methanol reforming hydrogen production system can be used in combination with a fuel cell; the fuel cell anode tail gas is connected to the oxidation chamber in the methanol reformer, for using the anode tail gas produced by the fuel cell as the fuel for catalytic oxidation of the oxidation chamber, thereby improving the tail gas utilization rate and energy conversion efficiency; the reforming gas pipeline or the reformer main pipeline of the methanol reformer is connected to the anode of the fuel cell, for using the reforming hydrogen produced by the methanol reformer as the anode fuel of the fuel cell.

[0031] In the present application, the above technical solutions can be freely combined to form new technical solutions without conflict with each other.

[0032] The technical solution of the present application has the following beneficial technical effects relative to the prior art:

[0033] The present application adopts modular design, and a large-scale modular methanol reforming hydrogen production system is formed by highly integrating a plurality of separate small methanol reforming hydrogen production modules. Due to the modular design, the modular methanol reforming hydrogen production system has the advantages of strong scalability, adjustable hydrogen production capacity, and relatively more flexibility. Moreover, the separate small hydrogen production modules can be started simultaneously, thereby shortening the startup time of the entire large-scale modular methanol reforming hydrogen production system and reducing the startup energy consumption of the entire hydrogen production system. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 A control structure flowchart of a large-scale modular methanol reforming hydrogen production system;

[0035] Figure 2 A structural schematic diagram of a large-scale modular methanol reforming hydrogen production system. DETAILED DESCRIPTION

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described below in detail with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0037] Unless otherwise specifically indicated, all the various raw materials, reagents, instruments, and equipment used in the present application can be purchased from the market or can be prepared by existing methods.

[0038] Embodiment 1

[0039] A large-scale modular methanol reforming hydrogen production system, as shown in Figure 1As shown, the control system, air intake module, methanol supply module, multiple methanol reforming hydrogen modules, reforming gas main pipeline for hydrogen supply and tail gas main pipeline for heat supply; wherein, the control system through the air intake module, methanol supply module, multiple methanol reforming hydrogen modules for distributed control, so as to realize the hydrogen supply and heat supply of large modular methanol reforming hydrogen system. As shown in Figure 2 As shown, the fuel supply system includes a methanol water solution main tank (i.e. Figure 1 The methanol barrel in the methanol water solution main pipeline and the methanol water solution feeding pump; methanol water solution main pipeline is connected with any one of the multiple methanol reforming hydrogen module methanol water solution sub-pipeline; air intake system includes a fan and air pipeline.

[0040] Multiple methanol reforming hydrogen module can use the same methanol reforming hydrogen module. Methanol reforming hydrogen module includes methanol reformer, tail gas heat exchanger, methanol evaporator, methanol water solution sub-feeding pump, methanol water solution sub-pipeline, reforming gas sub-pipeline, tail gas sub-pipeline and switching power supply. Methanol water solution main pipeline is connected with any one of the multiple methanol reforming hydrogen module methanol water solution sub-pipeline; reforming gas sub-pipeline is connected with reforming gas main pipeline, tail gas sub-pipeline is connected with tail gas main pipeline. Methanol reformer includes vaporization chamber, oxidation chamber and reforming chamber.

[0041] Methanol reformer for oxidation of methanol water solution inlet is connected with methanol water solution sub-feeding pump through methanol water solution sub-pipeline; the methanol water solution for oxidation enters the vaporization chamber of methanol reformer for vaporization, and after mixing with air, enters the oxidation chamber to occur methanol catalytic oxidation reaction, generates high temperature tail gas, and the outlet temperature of high temperature tail gas is 400-450 DEG C.

[0042] Methanol reformer for reforming of methanol water solution inlet is connected with tail gas heat exchanger, methanol evaporator and methanol water solution sub-feeding pump in turn, and the methanol water solution is pumped to the methanol evaporator by methanol water solution sub-feeding pump for heating, then enters the tail gas heat exchanger to exchange heat with high temperature tail gas from the methanol reformer, and the heated methanol water solution enters the reforming chamber of the methanol reformer to participate in the methanol water catalytic reforming hydrogen reaction, and the reforming hydrogen gas is obtained, and the temperature of the reforming hydrogen gas is 150-200 DEG C. Specifically, the outlet of high temperature tail gas is connected with tail gas heat exchanger and methanol evaporator in turn to form high temperature tail gas heat exchange channel; the methanol water solution is connected with methanol evaporator, tail gas heat exchanger and reforming chamber in turn by methanol water solution feeding pump to form methanol water solution heat exchange channel; because the high temperature tail gas and the methanol water solution are twice exchanged in the tail gas heat exchanger and the methanol evaporator, thus forming a two-stage heat exchange structure.

[0043] The embodiment utilizes the heat of high-temperature tail gas and the methanol evaporator to rapidly heat and vaporize the methanol aqueous solution for the reforming reaction, and then the methanol aqueous solution enters the reforming chamber to perform the catalytic reforming reaction to obtain the reforming hydrogen, thereby solving the problem of long start-up time of the methanol reformer.

[0044] In addition, in the embodiment, the methanol reformer, the tail gas heat exchanger and the methanol evaporator are made of aluminum alloy material. The multiple methanol reforming hydrogen modules are sealed and connected with the methanol aqueous solution main pipeline, the reforming gas main pipeline and the tail gas main pipeline through high-temperature resistant sealing rings. The whole of the methanol reformer, the tail gas heat exchanger and the methanol evaporator, and each main pipeline (including the methanol aqueous solution main pipeline, the reforming gas main pipeline and the tail gas main pipeline) and sub-pipeline (including the methanol aqueous solution sub-pipeline, the reforming gas sub-pipeline and the tail gas sub-pipeline) are insulated with insulation cotton or heat insulation sleeves to reduce heat loss.

[0045] In the embodiment, there are 12 sets of methanol reforming hydrogen modules. The reforming hydrogen outlet of each set of methanol reforming hydrogen module is connected with the anode of one fuel cell through the reforming hydrogen sub-pipeline, and the reforming hydrogen obtained by the catalytic reforming reaction of the methanol aqueous solution is used as the anode fuel of the fuel cell. The oxidation chamber of each set of methanol reforming hydrogen module is connected with the anode tail gas outlet of the fuel cell, and the anode tail gas of the fuel cell is used as the fuel of the oxidation chamber of the methanol reformer to generate high-temperature gas.

[0046] The power supply interface of the large-scale modular methanol reforming hydrogen system is 220VAC, 50Hz, the power during the start-up stage is 1.25-1.35kW, and the power during the running stage is 0.19-0.21kW. The multiple methanol reforming hydrogen modules can be started simultaneously to produce hydrogen or can be started partially to produce hydrogen, and each module of the multiple methanol reforming hydrogen modules runs independently and is not affected by other modules.

[0047] The hydrogen gas prepared by using the above system has a pressure of 0.095-0.105MPa, a temperature of 150-200℃, a gas flow of 1-5Nm 3 / h, a hydrogen purity of 67%-73%(vol), a carbon dioxide content of 2.8%-3.2%(vol), a carbon monoxide content of 0.95%-1.2%(vol), and a methanol aqueous solution consumption of 30-120g / min in each methanol reforming hydrogen module.

[0048] The overall start-up time of the large-scale modular methanol reforming hydrogen system is 20-25min, and the maximum hydrogen production amount is 45-50Nm 3 / h.

[0049] The above description is merely that of the application in its specific embodiments and enables those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. In the present application, the terms "first", "second", "third", are used only for the purpose of description, and should not be understood as indicating or implying relative importance. The term "multiple" refers to two or more, unless otherwise explicitly limited. The terms "mount", "connect", "couple", "fix", and the like, should be interpreted broadly, for example, "connect" can be fixed connection, or detachable connection, or integral connection; can be direct connection, or indirect connection through intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0050] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or unit referred to must have a particular direction, be constructed and operated in a particular orientation, therefore, should not be understood as a limitation on the present application.

[0051] In the description of the present application, the terms "one embodiment", "some embodiments", "a specific embodiment", and the like, mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0052] The above is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A modular methanol reforming hydrogen production system, characterized by, The system comprises a control system, an air intake module, a methanol supply module, a plurality of methanol reforming modules, a reforming gas main pipeline for hydrogen supply, and a tail gas main pipeline for heat supply; wherein the fuel supply system comprises a methanol aqueous solution main tank, a methanol aqueous solution main pipeline, and a methanol aqueous solution feed pump; the methanol aqueous solution main tank is connected with the methanol aqueous solution feed pump through the methanol aqueous solution main pipeline; The methanol reforming module comprises a methanol reformer, a tail gas heat exchanger, a methanol evaporator, a methanol aqueous solution sub-feed pump, a methanol aqueous solution sub-pipeline, a reforming gas sub-pipeline, a tail gas sub-pipeline, and a switching power supply; The methanol aqueous solution main pipeline is connected with the methanol aqueous solution sub-pipeline of any one of the plurality of methanol reforming modules; the reforming gas sub-pipeline is connected with the reforming gas main pipeline; and the tail gas sub-pipeline is connected with the tail gas main pipeline. In the methanol reforming module, the methanol reformer comprises a vaporization chamber, an oxidation chamber, and a reforming chamber; the oxidation chamber generates high-temperature tail gas through catalytic oxidation of methanol; and the reforming chamber generates hydrogen through reforming of methanol water; the outlet of the high-temperature tail gas in the methanol reformer is sequentially connected with the tail gas heat exchanger and the methanol evaporator; and the methanol aqueous solution main tank is sequentially connected with the methanol evaporator, the tail gas heat exchanger, and the reforming chamber through the methanol aqueous solution feed pump.

2. The modular methanol reforming hydrogen production system according to claim 1, wherein The air intake module comprises an air pipeline and a fan; and the air inlet of the methanol reformer is connected with the fan through the air pipeline. The outlet of the high-temperature tail gas in the methanol reformer is sequentially connected with the tail gas heat exchanger and the methanol evaporator through the tail gas sub-pipeline, and then connected with the tail gas main pipeline, and finally used for heating through the heat exchanger or a heating device.

3. The modular methanol reforming hydrogen production system according to claim 1, wherein The methanol reforming module further comprises a methanol aqueous solution sub-tank; and the methanol aqueous solution main tank is connected with the methanol aqueous solution sub-tank through the methanol aqueous solution main pipeline.

4. The modular methanol reforming hydrogen production system according to claim 1, wherein The methanol aqueous solution sub-pipeline is connected with the methanol aqueous solution sub-feed pump; the methanol aqueous solution inlet for oxidation of the methanol reformer is connected with the methanol aqueous solution sub-feed pump through the methanol aqueous solution sub-pipeline; and the methanol aqueous solution inlet for reforming of the methanol reformer is sequentially connected with the tail gas heat exchanger, the methanol evaporator, and the methanol aqueous solution sub-feed pump through the methanol aqueous solution sub-pipeline.

5. The modular methanol reforming hydrogen production system according to claim 1, wherein In the methanol reforming module, the temperature of the tail gas outlet of the oxidation chamber is 400-450℃, and the temperature of the hydrogen outlet of the reforming chamber is 150-200℃.

6. The modular methanol reforming hydrogen production system according to claim 1, wherein The control system comprises a PLC module; and the PLC module performs distributed control on the fan in the air intake module, the methanol aqueous solution feed pump in the methanol supply module, and the methanol reformer and the methanol aqueous solution sub-feed pump in the methanol reforming module. ​ 7. The modular methanol reforming hydrogen production system according to claim 6, wherein the control system further comprises a safety module, and the safety module comprises a temperature alarm function.

8. The modular methanol reforming hydrogen production system according to any one of claims 1-7, wherein the methanol reformer, the exhaust gas heat exchanger and the methanol evaporator are made of aluminum alloy or stainless steel; the exhaust gas heat exchanger is connected to the methanol reformer by a fluorine rubber sealing ring; and the methanol evaporator is connected to the exhaust gas heat exchanger by a fluorine rubber sealing ring.

9. The modular methanol reforming hydrogen production system according to any one of claims 1-7, wherein the plurality of methanol reforming hydrogen production modules are connected to the methanol aqueous solution main pipeline, the reforming gas main pipeline and the exhaust gas main pipeline by high-temperature resistant sealing rings; or / and the modular methanol reforming hydrogen production system is insulated by insulation cotton or heat insulation sleeves, and the methanol reformer, the exhaust gas heat exchanger and the methanol evaporator, and the main pipelines and the sub-pipelines are insulated by the insulation cotton or the heat insulation sleeves; wherein the main pipelines include the methanol aqueous solution main pipeline, the reforming gas main pipeline and the exhaust gas main pipeline; and the sub-pipelines include the methanol aqueous solution sub-pipeline, the reforming gas sub-pipeline and the exhaust gas sub-pipeline.

10. The modular methanol reforming hydrogen production system according to any one of claims 1-7, wherein the modular methanol reforming hydrogen production system can be used in combination with a fuel cell; the fuel cell anode exhaust gas is connected to the oxidation chamber of the methanol reformer, and is used as fuel for catalytic oxidation in the oxidation chamber; and the reforming gas pipeline or the reformer main pipeline of the methanol reformer is connected to the anode of the fuel cell, and is used as anode fuel for the fuel cell. ​ ​ ​ ​ ​ ​

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