Methanol hydrogen production system

Abstract

The utility model discloses a methanol hydrogen production system, which relates to the technical field of hydrogen production and comprises a reaction device, a heating device and a separation device, the reaction device is provided with a reaction feed port and a gas outlet which are communicated with an internal reaction cavity, and the reaction feed port is used for introducing liquid methanol; the heating device is used for heating the liquid methanol in the reaction cavity so that the liquid methanol can be cracked and generate mixed gas, and the gas outlet can discharge the mixed gas; the separation device is provided with a gas inlet, a first gas outlet and a second gas outlet, the gas inlet can be communicated with the gas outlet and is used for introducing mixed gas, the separation device can separate the mixed gas into hydrogen and carbon monoxide, and the hydrogen and the carbon monoxide are discharged through the first gas outlet and the second gas outlet respectively. The methanol hydrogen production system provided by the utility model does not need aqueous solution raw materials, is simple in raw materials and is convenient for hydrogen production.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen production, in particular to a methanol hydrogen production system. Background Art

[0002] Hydrogen is a high-quality secondary energy source that is easy to produce, highly efficient, environmentally friendly, and widely applicable, contributing to carbon reduction and optimizing the energy mix. However, the further development of hydrogen energy is hampered by industry pain points such as high storage and transportation costs, significant safety risks, and significant infrastructure investment. Online hydrogen production using methanol can effectively address these issues.

[0003] However, the current methanol online hydrogen production system usually uses methanol and aqueous solution to prepare hydrogen, which has complicated raw materials and is inconvenient to use. Utility Model Content

[0004] The purpose of the utility model is to provide a methanol hydrogen production system to solve the problems existing in the above-mentioned prior art. It does not require aqueous solution raw materials, has simple raw materials, and is convenient for hydrogen production.

[0005] To achieve the above purpose, the present invention provides the following solutions:

[0006] The utility model provides a methanol hydrogen production system, comprising a reaction device, a heating device and a separation device; the reaction device is provided with a reaction feed port and an air outlet connected to an internal reaction chamber, the reaction feed port is used to introduce liquid methanol; the heating device is used to heat the liquid methanol in the reaction chamber so that the liquid methanol can be cracked and produce a mixed gas, and the air outlet can discharge the mixed gas; the separation device is provided with an air inlet, a first exhaust port and a second exhaust port, the air inlet can be connected to the air outlet and used to introduce the mixed gas, the separation device can separate the mixed gas into hydrogen and carbon monoxide, and the hydrogen and the carbon monoxide are discharged through the first exhaust port and the second exhaust port respectively.

[0007] Preferably, a heat exchange device is also included, which has a methanol inlet, a methanol outlet, a gas inlet and a gas outlet, the methanol inlet is used to introduce liquid methanol, the methanol outlet is connected to the reaction feed port and is used to discharge liquid methanol, the gas inlet is connected to the gas outlet and is used to introduce the mixed gas, and the gas outlet is connected to the gas inlet and is used to discharge the mixed gas; the mixed gas introduced through the gas inlet can exchange heat with the liquid methanol introduced through the methanol inlet.

[0008] Preferably, it also includes a combustion device, which has a fuel inlet and a hot gas outlet. The reaction device is provided with a hot gas inlet, and a heating pipeline is provided in the reaction device. One end of the heating pipeline is connected to the hot gas inlet, and the other end is connected to the outside world; the fuel inlet is connected to the second exhaust port and is used to introduce the carbon monoxide. The combustion device can burn the carbon monoxide and generate a hot gas flow. The hot gas outlet is connected to the hot gas inlet through a hot gas pipeline. The hot gas flow can be discharged through the hot gas outlet and enter the heating pipeline through the hot gas inlet to heat the liquid methanol.

[0009] Preferably, it further includes a hydrogen storage device, which is connected to the first exhaust port through a hydrogen storage pipeline, and the hydrogen can enter the hydrogen storage device through the hydrogen storage pipeline for storage; and the hydrogen storage device is provided with a pressure monitoring component for monitoring the pressure information in the hydrogen storage device.

[0010] Preferably, a methanol storage device is further included, wherein the methanol storage device is connected to the methanol inlet through a methanol pipeline, the liquid methanol is stored in the methanol storage device, and the liquid methanol enters the heat exchange device through the methanol pipeline.

[0011] Preferably, a first control valve is provided on the hot gas pipeline, which can be connected to the hot gas inlet, the hot gas outlet and the outside, and is used to control the ratio of the hot gas flowing into the hot gas inlet and discharged to the outside.

[0012] Preferably, the hydrogen storage pipeline is provided with a first temperature monitoring component and a first flow monitoring component, which are used to monitor the temperature information and flow information of the hydrogen in the hydrogen storage pipeline respectively.

[0013] Preferably, a second control valve and a second flow monitoring component are provided on the methanol pipeline, the second control valve is used to control the flow of the methanol pipeline, and the second flow monitoring component is used to monitor the flow information in the methanol pipeline.

[0014] Preferably, the reaction device is provided with a second temperature monitoring component for monitoring the temperature information in the reaction chamber; and the reaction feed port of the reaction device is provided with an atomizing nozzle, and an integrally coated catalyst carrier is provided in the reaction device, and the integrally coated catalyst carrier is used to carry a catalyst that can catalyze the cracking of the liquid methanol.

[0015] Preferably, a controller is further included, and the heating device is configured as an electric heater. The controller is communicatively connected with the first temperature monitoring device, the first flow monitoring device, the pressure monitoring device, the second flow monitoring device and the second temperature monitoring device, and is capable of receiving corresponding temperature information or flow information; the controller is also communicatively connected with the heating device, the first control valve and the second control valve, and is capable of controlling the actions of the heating device, the first control valve and the second control valve.

[0016] Compared with the prior art, the utility model has achieved the following technical effects:

[0017] The utility model provides a methanol hydrogen production system. After liquid methanol is introduced into a reaction device through a reaction feed port, the liquid methanol is heated and cracked and vaporized into a mixed gas of hydrogen and carbon monoxide under the heating action of a heating device. The mixed gas enters a separation device through a gas outlet. The separation device separates the hydrogen and carbon monoxide, and the hydrogen is separated for subsequent storage of the hydrogen. In this way, no aqueous solution raw material is required in the hydrogen production system, the raw materials are simple, and hydrogen production is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a flow chart of the methanol hydrogen production system provided in Example 1.

[0020] In the figure: 1-reaction device; 11-reaction feed port; 12-gas outlet; 13-hot gas inlet; 14-second temperature monitoring device; 2-heating device; 3-separation device; 31-gas inlet; 32-first exhaust port; 33-second exhaust port; 4-heat exchange device; 41-methanol inlet; 42-methanol outlet; 43-gas inlet; 44-gas outlet; 5-combustion device; 51-fuel inlet; 52-hot gas outlet; 53-hot gas pipeline; 54-first control valve; 6-hydrogen storage device; 61-hydrogen storage pipeline; 62-first temperature monitoring device; 63-first flow monitoring device; 64-pressure monitoring device; 7-methanol storage device; 71-methanol pipeline; 72-second control valve; 73-second flow monitoring device. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] The purpose of the utility model is to provide a methanol hydrogen production system to solve the problems existing in the above-mentioned prior art. It does not require aqueous solution raw materials, has simple raw materials, and is convenient for hydrogen production.

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0024] Example 1

[0025] This embodiment provides a methanol hydrogen production system. Figure 1 , including a reaction device 1, a heating device 2 and a separation device 3; the reaction device 1 has a reaction feed port 11 and a gas outlet 12 connected to the internal reaction chamber, the reaction feed port 11 is used to introduce liquid methanol; the heating device 2 is used to heat the liquid methanol in the reaction chamber so that the liquid methanol can be cracked and produce a mixed gas, and the gas outlet 12 can discharge the mixed gas; the separation device 3 has an air inlet 31, a first exhaust port 32 and a second exhaust port 33, the air inlet 31 can be connected to the gas outlet 12 and used to introduce the mixed gas, the separation device 3 can separate the mixed gas into hydrogen and carbon monoxide, and the hydrogen and carbon monoxide are discharged through the first exhaust port 32 and the second exhaust port 33 respectively.

[0026] After liquid methanol is introduced into the reaction device 1 through the reaction feed port 11, the liquid methanol is heated and cracked and vaporized into a mixture of hydrogen and carbon monoxide under the heating action of the heating device 2. The mixed gas enters the separation device 3 through the gas outlet 12. The separation device 3 separates the hydrogen and carbon monoxide, and separates the hydrogen for subsequent storage of hydrogen. In this way, no aqueous solution raw material is required in the hydrogen production system, the raw materials are simple, and hydrogen production is convenient.

[0027] In the optional scheme of this embodiment, it is more preferred that the methanol hydrogen production system provided in this embodiment further includes a heat exchange device 4, the heat exchange device 4 has a methanol inlet 41, a methanol outlet 42, a gas inlet 43 and a gas outlet 44, the methanol inlet 41 is used to introduce liquid methanol, the methanol outlet 42 is connected to the reaction feed port 11 and is used to discharge liquid methanol, the gas inlet 43 is connected to the gas outlet 12 and is used to introduce the mixed gas, and the gas outlet 44 is connected to the gas inlet 31 and is used to discharge the mixed gas; the mixed gas introduced into the gas inlet 43 can exchange heat with the liquid methanol introduced into the methanol inlet 41, and the mixed gas discharged from the reaction device 1 has a certain amount of heat, which can preheat the liquid methanol, reduce the heat required for subsequent heating, and save energy; wherein, the heat exchange device 4 can adopt a commonly used gas-liquid heat exchange device, such as a plate heat exchanger.

[0028] In the optional scheme of this embodiment, it is more preferred that the methanol hydrogen production system provided by this embodiment further includes a combustion device 5, the combustion device 5 has a fuel inlet 51 and a hot gas outlet 52, a hot gas inlet 13 is provided on the reaction device 1, and a heating pipeline is provided in the reaction device 1, one end of the heating pipeline is connected to the hot gas inlet 13, and the other end is connected to the outside; the fuel inlet 51 is connected to the second exhaust port 33 and is used to introduce carbon monoxide, the combustion device 5 can burn the carbon monoxide and generate a hot gas flow, the hot gas outlet 52 is connected to the hot gas inlet 13 through the hot gas pipeline 53, the hot gas flow can be discharged through the hot gas outlet 52 and enter the heating pipeline through the hot gas inlet 13 to heat the liquid methanol; the carbon monoxide separated by the separation device 3 is burned by the combustion device 5 to avoid direct discharge, and the generated hot gas flow can heat the liquid methanol in the reaction device 1, fully utilize the heat of the hot gas flow, and discharge it to the outside, and the hot gas flow heating can replace the heating device 2 or assist in heating; the heating pipeline can be spirally arranged in the reaction device 1.

[0029] Among the optional schemes of this embodiment, it is more preferred that the methanol hydrogen production system provided in this embodiment also includes a hydrogen storage device 6, which is connected to the first exhaust port 32 through a hydrogen storage pipeline 61. Hydrogen can enter the hydrogen storage device 6 through the hydrogen storage pipeline 61 for storage, and the hydrogen storage device 6 is provided with a pressure monitoring component 64 for monitoring the pressure information in the hydrogen storage device 6; the hydrogen storage device 6 is configured as a hydrogen storage tank, which can store hydrogen and maintain a certain pressure, and the pressure monitoring component 64 is configured as a pressure sensor.

[0030] Among the optional schemes of this embodiment, it is more preferred that the methanol hydrogen production system provided in this embodiment also includes a methanol storage device 7, which is connected to the methanol inlet 41 through a methanol pipeline 71, and liquid methanol is stored in the methanol storage device 7, and the liquid methanol enters the heat exchange device 4 through the methanol pipeline 71; wherein the methanol storage device 7 is configured as a methanol pump tank for storing methanol raw materials, and a built-in integrated methanol pump is used to provide methanol with a certain flow rate and pressure.

[0031] In the optional scheme of this embodiment, it is more preferred that a first control valve 54 is provided on the hot gas pipeline 53, and the first control valve 54 can be connected to the hot gas inlet 13, the hot gas outlet 52 and the outside. The first control valve 54 is used to control the ratio of the hot gas flow into the hot gas inlet 13 and the discharge to the outside. By controlling the flow rate of the hot gas flow entering the heating pipeline, the heating of the liquid methanol can be controlled, the temperature inside the reaction device 1 can be controlled to be stable, and the catalytic cracking reaction inside the reaction device 1 can be ensured to proceed normally; specifically, the first control valve 54 is set as an electrically controlled proportional valve to facilitate electrical control.

[0032] In the optional scheme of this embodiment, it is more preferred that a first temperature monitoring component 62 and a first flow monitoring component 63 are provided on the hydrogen storage pipeline 61, which are respectively used to monitor the temperature information and flow information of the hydrogen in the hydrogen storage pipeline 61, so as to monitor the hydrogen production situation and perform system regulation; specifically, the first temperature monitoring component 62 and the first flow monitoring component 63 are respectively set as a temperature sensor and a flow meter.

[0033] In the optional scheme of this embodiment, it is more preferred that a second control valve 72 and a second flow monitoring component 73 are provided on the methanol pipeline 71, the second control valve 72 is used to control the flow of the methanol pipeline 71, and the second flow monitoring component 73 is used to monitor the flow information in the methanol pipeline 71, so as to control the methanol supply flow according to the system operation conditions; specifically, the second control valve 72 and the second flow monitoring component 73 are respectively set as an electric control valve and a flow meter.

[0034] In the optional scheme of this embodiment, it is more preferred that the reaction device 1 is provided with a second temperature monitoring component 14 for monitoring the temperature information in the reaction chamber, so as to facilitate timely acquisition of the temperature information in the reaction device 1, and the second temperature monitoring component 14 is configured as a temperature sensor; and the reaction feed port 11 of the reaction device 1 is provided with an atomizing nozzle 15, so that the liquid methanol is atomized and sprayed into the reaction device 1, thereby improving the catalytic cracking efficiency; wherein the reaction device 1 is configured as a conventional catalytic reactor, in which an integrally coated catalyst carrier is provided, that is, a monolithic catalyst carrier, which is used to carry a catalyst that can catalyze the cracking of liquid methanol. Unlike traditional particulate filled catalysts, the use of an integrally coated catalyst carrier technology can meet automotive-grade vibration requirements, and has a long service life, good reliability and low cost.

[0035] In the optional scheme of this embodiment, it is more preferred that the methanol hydrogen production system provided in this embodiment also includes a controller, the heating device 2 is set to a conventional electric heater such as an electric heating tube heater, the controller is communicated with the first temperature monitoring device 62, the first flow monitoring device 63, the pressure monitoring device 64, the second flow monitoring device 73 and the second temperature monitoring device 14, and can receive corresponding temperature information or flow information so that the controller can obtain the operation information of the system in time; the controller is also communicated with the heating device 2, the first control valve 54 and the second control valve 72, and can control the action of the heating device 2, the first control valve 54 and the second control valve 72 so as to regulate the system, facilitate the rapid, real-time and efficient online conversion of methanol to hydrogen, meet the vehicle-grade requirements, and provide a clean hydrogen energy supply for various hydrogen-requiring vehicles; the controller can adopt an electric control cabinet.

[0036] Among them, in the initial stage of system startup, the controller controls the heating device 2 through feedback from the second temperature monitoring device 14 to adjust the heating temperature inside the reaction device 1. When the system is running stably, the controller controls the flow rate of the hot air flow entering the heating pipeline by controlling the opening of the first control valve 54, thereby controlling the temperature inside the reaction device 1 to be stable, ensuring that the catalytic reaction inside the reaction device 1 proceeds normally.

[0037] Further preferably, separation device 3 utilizes an existing pressure swing adsorption separator. This separator utilizes advanced adsorption materials and technologies to selectively adsorb and separate the mixed gas generated by the reaction. The principle of pressure swing adsorption separation is to achieve adsorption and desorption by controlling the rise and fall of pressure. During pressure increase, the adsorbent at high pressure initially adsorbs the strongly adsorbed components in the mixed gas. Once adsorption reaches saturation, the adsorption tower enters a regeneration process, desorbing the adsorbate from the adsorption bed by reducing the pressure, while unadsorbed components are discharged through the adsorption layer. Due to the varying adsorption and desorption characteristics of different gases, separation can be achieved during periodic pressure fluctuations.

[0038] The methanol-to-hydrogen system provided in this embodiment has modular arrangements of components, which facilitates installation and maintenance.

[0039] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A methanol hydrogen production system, characterized by: include: The reaction device (1) has a reaction feed port (11) and a gas outlet (12) communicating with an internal reaction chamber, wherein the reaction feed port (11) is used to introduce liquid methanol; A heating device (2) is used to heat the liquid methanol in the reaction chamber so that the liquid methanol can be cracked and generate a mixed gas, and the gas outlet (12) can discharge the mixed gas; and A separation device (3) comprises an air inlet (31), a first exhaust port (32) and a second exhaust port (33); the air inlet (31) is communicable with the air outlet (12) and is used to introduce the mixed gas; the separation device (3) is capable of separating the mixed gas into hydrogen and carbon monoxide; the hydrogen and carbon monoxide are discharged through the first exhaust port (32) and the second exhaust port (33), respectively.

2. The methanol-to-hydrogen system according to claim 1, characterized in that: The heat exchange device (4) is also included. The heat exchange device (4) has a methanol inlet (41), a methanol outlet (42), a gas inlet (43) and a gas outlet (44). The methanol inlet (41) is used to introduce liquid methanol. The methanol outlet (42) is connected to the reaction feed port (11) and is used to discharge liquid methanol. The gas inlet (43) is connected to the gas outlet (12) and is used to introduce the mixed gas. The gas outlet (44) is connected to the gas inlet (31) and is used to discharge the mixed gas. The mixed gas introduced through the gas inlet (43) can exchange heat with the liquid methanol introduced through the methanol inlet (41).

3. The methanol-to-hydrogen system according to claim 2, characterized in that: The combustion device (5) further comprises a combustion device (5), wherein the combustion device (5) has a fuel inlet (51) and a hot gas outlet (52); the reaction device (1) is provided with a hot gas inlet (13); a heating pipeline is provided in the reaction device (1); one end of the heating pipeline is connected to the hot gas inlet (13), and the other end is connected to the outside; the fuel inlet (51) is connected to the second exhaust port (33) and is used to introduce the carbon monoxide; the combustion device (5) can burn the carbon monoxide and generate a hot gas flow; the hot gas outlet (52) is connected to the hot gas inlet (13) through the hot gas pipeline (53); the hot gas flow can be discharged through the hot gas outlet (52) and enter the heating pipeline through the hot gas inlet (13) to heat the liquid methanol.

4. The methanol-to-hydrogen system according to claim 3, characterized in that: The invention also includes a hydrogen storage device (6), wherein the hydrogen storage device (6) is connected to the first exhaust port (32) via a hydrogen storage pipeline (61), and the hydrogen can enter the hydrogen storage device (6) through the hydrogen storage pipeline (61) for storage; and the hydrogen storage device (6) is provided with a pressure monitoring component (64) for monitoring pressure information in the hydrogen storage device (6).

5. The methanol-to-hydrogen system according to claim 4, characterized in that: The heat exchange device (4) further comprises a methanol storage device (7), wherein the methanol storage device (7) is connected to the methanol inlet (41) via a methanol pipeline (71), and the liquid methanol is stored in the methanol storage device (7), and the liquid methanol enters the heat exchange device (4) via the methanol pipeline (71).

6. The methanol-to-hydrogen system according to claim 5, characterized in that: The hot gas pipeline (53) is provided with a first control valve (54), which can be connected to the hot gas inlet (13), the hot gas outlet (52) and the outside world. The first control valve (54) is used to control the ratio of the hot gas flowing into the hot gas inlet (13) and being discharged to the outside world.

7. The methanol-to-hydrogen system according to claim 6, characterized in that: The hydrogen storage pipeline (61) is provided with a first temperature monitoring component (62) and a first flow monitoring component (63), which are used to monitor the temperature information and flow information of the hydrogen in the hydrogen storage pipeline (61), respectively.

8. The methanol-to-hydrogen system according to claim 7, characterized in that: The methanol pipeline (71) is provided with a second control valve (72) and a second flow monitoring component (73). The second control valve (72) is used to control the flow of the methanol pipeline (71), and the second flow monitoring component (73) is used to monitor the flow information in the methanol pipeline (71).

9. The methanol-to-hydrogen system according to claim 8, characterized in that: The reaction device (1) is provided with a second temperature monitoring component (14) for monitoring the temperature information in the reaction chamber; and the reaction feed port (11) of the reaction device (1) is provided with an atomizing nozzle (15); an integrally coated catalyst carrier is provided in the reaction device (1), and the integrally coated catalyst carrier is used to carry a catalyst capable of catalyzing the cracking of the liquid methanol.

10. The methanol-to-hydrogen system according to claim 9, characterized in that: The invention also includes a controller, wherein the heating device (2) is configured as an electric heater, and the controller is connected in communication with the first temperature monitoring device (62), the first flow monitoring device (63), the pressure monitoring device (64), the second flow monitoring device (73) and the second temperature monitoring device (14), and is capable of receiving corresponding temperature information or flow information; the controller is also connected in communication with the heating device (2), the first control valve (54) and the second control valve (72), and is capable of controlling the actions of the heating device (2), the first control valve (54) and the second control valve (72).

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