Methanol hydrogen production system

Abstract

A methanol-to-hydrogen system belongs to the technical field of hydrogen preparation. Comprising a heat exchanger, a heating unit and a converter, materials are connected into an inlet of a low-temperature medium pipeline of the heat exchanger, an outlet of the low-temperature medium pipeline of the heat exchanger is connected into an inlet of the heating unit, and an outlet of the heating unit is connected into the converter. The device is characterized in that the heating unit comprises a vaporizer and a superheater, and shells of the vaporizer and the superheater are tightly attached into a whole. In the methanol hydrogen production system, the heating unit formed by combining the vaporizer and the superheater is arranged, so that on the premise of ensuring the gasification effect of the raw materials, the loss of temperature is reduced to the greatest extent, and the utilization rate of high temperature is improved. Heat conduction oil circulation is arranged between the superheater and the converter, and the high-temperature heat conduction oil in the superheater is used for providing reaction temperature for the interior of the converter.

Description

Technical Field

[0001] The utility model is designed in the technical field of hydrogen preparation, and specifically relates to a methanol hydrogen production system. Background Art

[0002] In the prior art, when preparing industrial hydrogen, the method of producing hydrogen through methanol-water vapor reforming is a relatively mature and commonly used method. Its principle is roughly to gasify the raw materials consisting of methanol and water in a superheater at high temperature and then send them into a converter, where cracking conversion and shift reaction are carried out respectively under the action of the catalyst in the converter. Since the temperature of the hydrogen output in the converter is relatively high, in order to realize the preheating and utilization of hydrogen, hydrogen is generally connected to the heat exchanger as a high-temperature medium to preheat the raw materials composed of methanol and water, and at the same time, the hydrogen is cooled for subsequent storage, such as the technical solution recorded in the Chinese invention patent with application number 202310722928.X, application date June 19, 2023, and patent name "A methanol reforming hydrogen production hydrogen-powered wind power operation and maintenance ship"; the technical solution recorded in the Chinese invention patent with application number 202410638619.9, application date May 22, 2024, and patent name "A low-carbon energy supply system and flexible control method with green methanol as a carrier"; the technical solution recorded in the Chinese invention patent with application number 202311216197.8, application date September 19, 2023, and patent name "Methanol cracking hydrogen production equipment startup control method, device, equipment and storage medium".

[0003] However, a common problem in the prior art including the above technical solution is that each heating component is individually provided, which easily causes temperature loss and wastes resources. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a methanol hydrogen production system which is provided with a heating unit formed by a combination of a vaporizer and a superheater, and which reduces temperature loss to the greatest extent while ensuring the gasification effect of the raw materials.

[0005] The technical solution adopted by the utility model to solve the technical problem is: the methanol hydrogen production system includes a heat exchanger, a heating unit and a converter, the material is connected to the inlet of the low-temperature medium pipeline of the heat exchanger, the outlet of the low-temperature medium pipeline of the heat exchanger is connected to the inlet of the heating unit, the outlet of the heating unit is connected to the converter, and the hydrogen produced by the converter is connected to the high-temperature medium pipeline of the heat exchanger. It is characterized in that: the heating unit includes a vaporizer and a superheater, the shells of the vaporizer and the superheater are tightly fitted as a whole, and a circulation channel for heat transfer oil is also provided between the superheater and the converter.

[0006] Preferably, the vaporizer comprises a shell, in which a coil through which the material flows is arranged, heat transfer oil is arranged in the shell of the vaporizer, and a vaporizer heater for heating the heat transfer oil is arranged in the vaporizer.

[0007] Preferably, the vaporizer heater is vertically arranged in the vaporizer shell from the top downward, and the coil is located at the outer ring of the vaporizer heater.

[0008] Preferably, the superheater includes an outer shell, in which a coil through which material flows is arranged, the coil in the superheater is connected to the coil in the vaporizer, heat transfer oil is arranged in the outer shell of the superheater, and a superheater heater for heating the heat transfer oil is arranged in the superheater.

[0009] Preferably, the superheater heater is arranged vertically downward in the superheater shell from the top, and the coil in the superheater is located at the outer ring of the superheater heater.

[0010] Preferably, the converter is connected to the inner cavity of the superheater to form a circulation channel for the heat transfer oil.

[0011] Preferably, a condenser is connected to the outlet of the high-temperature medium pipeline of the heat exchanger.

[0012] Preferably, a pressure-stabilizing gas storage tank is also provided at the output end of the condenser.

[0013] Preferably, a thermal insulation layer is provided outside the vaporizer and the superheater.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] In the methanol hydrogen production system, a heating unit formed by a combination of a vaporizer and a superheater is provided, which reduces the temperature loss to the greatest extent and improves the utilization rate of high temperature while ensuring the gasification effect of the raw material.

[0016] The hydrogen output from the converter is connected to the heat exchanger to preheat the raw materials, thereby improving the utilization rate of the residual heat of the hydrogen.

[0017] An insulation layer is arranged outside the vaporizer and the superheater, and the vaporizer and the superheater are arranged inside the insulation layer at the same time, so as to further avoid temperature loss.

[0018] A heat transfer oil circulation channel is provided between the superheater and the converter, and the high-temperature heat transfer oil in the superheater is utilized to provide a reaction temperature in the converter. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the methanol hydrogen production system.

[0020] Figure 2 This is a schematic diagram of the heating unit structure of the methanol hydrogen production system.

[0021] Among them: 1. Vaporizer heater; 2. Vaporizer; 3. Superheater heater; 4. Superheater raw material output pipe; 5. Superheater; 6. Superheater heat transfer oil output pipe; 7. Vaporizer raw material output pipe; 8. Vaporizer raw material input pipe; 9. Bracket; 10. Bottom plate; 11. Vaporizer heat transfer oil input pipe. DETAILED DESCRIPTION

[0022] Figure 1~2 It is the best embodiment of the utility model, and the following Figure 1~2 The utility model is further described.

[0023] like Figure 1 As shown, a methanol hydrogen production system includes a heat exchanger, a mixed raw material of methanol and water is fed into the inlet of the low-temperature medium pipeline of the heat exchanger, and preheated in the heat exchanger, the outlet of the low-temperature medium pipeline of the heat exchanger is connected to the material inlet of the vaporizer, the material outlet of the vaporizer is connected to the material inlet of the superheater, and the material outlet of the superheater is connected to the material inlet of the converter. The material outlet of the converter is connected to the inlet of the high-temperature medium pipeline of the heat exchanger, the outlet of the high-temperature medium pipeline of the heat exchanger is connected to the inlet of the condenser, and the material outlet of the condenser is connected to the pressure-stabilizing gas storage tank.

[0024] like Figure 2 As shown, the vaporizer 2 and the superheater 5 are tightly attached and fixed as one, and the vaporizer 2 and the superheater 5 constitute the heating unit of the methanol hydrogen production system. A bracket 9 is provided at the bottom of the vaporizer 2 and the superheater 5, and the heating unit is fixed to the surface of the bottom plate 10 by the bracket 9. In the heating unit of the methanol hydrogen production system, the superheater 5 and the vaporizer 2 are designed as an integrated structure, which realizes the heat transfer between the superheater 5 and the vaporizer 2, and avoids the loss of temperature to a certain extent. In order to further avoid the loss of temperature, an insulation layer can also be provided on the outside of the vaporizer 2 and the superheater 5, and the vaporizer 2 and the superheater 5 are simultaneously arranged therein through the insulation layer.

[0025] The vaporizer 2 includes an outer shell, in which a coil is arranged, and the coil is arranged along its height direction. Heat transfer oil is arranged in the outer shell of the vaporizer 2, and the coil is immersed in the heat transfer oil as a whole. A vaporizer heater 1 is arranged on the top of the vaporizer 2. The vaporizer heater 1 is arranged vertically in the outer shell from the top of the vaporizer 2 outer shell downward, and the coil in the vaporizer 2 is located at the outer circle of the vaporizer heater 1.

[0026] A vaporizer raw material input pipe 8 is provided at the lower part of the shell of the vaporizer 2. The vaporizer raw material input pipe 8 is the inlet of the coil in the vaporizer 2. The raw material output from the low-temperature medium outlet of the heat exchanger enters the vaporizer 2 through the vaporizer raw material input pipe 8. When the vaporizer heater 1 is working, the heating of the material is achieved by heating the heat transfer oil in the shell, and further the heating of the material in the coil is achieved. A vaporizer heat transfer oil input pipe 11 is also provided at the upper part of the shell of the vaporizer 2. The externally heated heat transfer oil enters the vaporizer 2 through the vaporizer heat transfer oil input pipe 11.

[0027] The superheater 5 also includes an outer shell, in which a coil is arranged, and the coil is arranged along its height direction. Heat transfer oil is also arranged in the outer shell of the superheater 5, and the coil is immersed in the heat transfer oil as a whole. A superheater heater 3 is arranged on the top of the superheater 5. The superheater heater 3 is arranged vertically in the outer shell from the top of the superheater 5 outer shell downward, and the coil in the superheater 5 is located at the outer circle of the superheater heater 3.

[0028] A vaporizer raw material output pipe 7 is led out from the upper part of the shell of the vaporizer 2, extends downward to the lower part of the superheater 5, and is connected to the superheater 5, and is connected to the coil inside the superheater 5 after entering the superheater 5. The outlet of the coil inside the superheater 5 extends to the upper part of the superheater 5, and a superheater raw material output pipe 4 is arranged on the top of the shell of the superheater 5, and the superheater raw material output pipe 4 is connected to the subsequent converter.

[0029] A superheater heat transfer oil output pipe 6 is also provided on the upper part of the superheater 5 shell. The superheater heat transfer oil output pipe 6 is connected to the shell of the subsequent converter as the input of the converter heat transfer oil. The bottom of the converter shell is also provided with a heat transfer oil outlet, and the heat transfer oil is returned to the superheater 5 through a pumping device, so that the circulation of the heat transfer oil between the superheater 5 and the converter is realized (see Figure 1 The high temperature heat transfer oil in the superheater 5 is used to provide the reaction temperature in the converter.

[0030] The specific working process and working principle are as follows:

[0031] The mixed raw material of methanol and water is fed into the inlet of the low-temperature medium pipeline of the heat exchanger, and preheated in the heat exchanger. The outlet of the low-temperature medium pipeline of the heat exchanger is connected to the material inlet of the vaporizer 2. The material is heated by the heat transfer oil in the vaporizer 2 and its temperature rises to 100°C, realizing the gasification of the raw material. The gasified raw material enters the superheater 5 again, and the temperature is raised again in the superheater 5 to 310°C.

[0032] After the material is output from the superheater 5, it is sent to the converter for reaction, and the reaction generates hydrogen. The hydrogen produced in the converter is connected to the inlet of the high-temperature medium pipeline of the heat exchanger, and its temperature is used to preheat the material and realize the first cooling of the hydrogen. After the first cooling in the heat exchanger, the hydrogen is condensed, and the second cooling is carried out in the condenser, and finally sent to the pressure-stabilizing gas storage tank for storage.

[0033] The above is only the preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model.

Claims

1. A methanol hydrogen production system, comprising a heat exchanger, a heating unit and a converter, wherein the material is connected to the inlet of the low-temperature medium pipeline of the heat exchanger, the outlet of the low-temperature medium pipeline of the heat exchanger is connected to the inlet of the heating unit, the outlet of the heating unit is connected to the converter, and the hydrogen produced by the converter is connected to the high-temperature medium pipeline of the heat exchanger, characterized in that: The heating unit comprises a vaporizer (2) and a superheater (5); the shells of the vaporizer (2) and the superheater (5) are tightly fitted together as a whole; and a circulation channel for heat transfer oil is provided between the superheater (5) and the converter.

2. The methanol-to-hydrogen system according to claim 1, characterized in that: The vaporizer (2) comprises an outer shell, in which a coil through which a material flows is arranged, heat transfer oil is arranged in the outer shell of the vaporizer (2), and a vaporizer heater (1) for heating the heat transfer oil is arranged in the vaporizer (2).

3. The methanol-to-hydrogen system according to claim 2, characterized in that: The carburetor heater (1) is arranged vertically downward from the top of the carburetor (2) shell inside the shell, and the coil is located on the outer ring of the carburetor heater (1).

4. The methanol-to-hydrogen system according to claim 2, characterized in that: The superheater (5) comprises an outer shell, in which a coil through which a material flows is arranged, the coil in the superheater (5) is butt-jointed with the coil in the vaporizer (2), heat transfer oil is arranged in the outer shell of the superheater (5), and a superheater heater (3) for heating the heat transfer oil is arranged in the superheater (5).

5. The methanol-to-hydrogen system according to claim 4, characterized in that: The superheater heater (3) is arranged vertically downward from the top of the superheater (5) shell in the shell, and the coil in the superheater (5) is located on the outer ring of the superheater heater (3).

6. The methanol-to-hydrogen system according to claim 1, characterized in that: The converter is connected to the inner cavity of the superheater (5) to form a circulation channel for the heat transfer oil.

7. The methanol-to-hydrogen system according to claim 1, characterized in that: The outlet of the high-temperature medium pipeline of the heat exchanger is connected with a condenser.

8. The methanol-to-hydrogen system according to claim 7, characterized in that: A pressure-stabilizing gas storage tank is also provided at the output end of the condenser.

9. The methanol-to-hydrogen system according to claim 1, characterized in that: A thermal insulation layer is provided outside the vaporizer (2) and the superheater (5).

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