Microchannel reactor for producing hydrogen from methanol

Abstract

The utility model relates to the technical field of methanol-to-hydrogen, and discloses a micro-channel reactor for methanol-to-hydrogen, which comprises a micro-channel reactor body and two groups of cover plates, a reactor inlet pipe and a reactor outlet pipe are mounted on one side of the micro-channel reactor body, and the connecting ends of the reactor inlet pipe and the reactor outlet pipe penetrate through the cover plates; a heat exchange assembly is mounted on one side of the micro-channel reactor body, and heat in the micro-channel reactor body is used for preheating feeding liquid and air in the reactor inlet pipe by the heat exchange assembly. Compared with the prior art, the micro-channel reactor has the advantages that combustion heat discharged by the micro-channel reactor body and heat exchanged by the micro-channel heat exchange assembly in the micro-channel reactor body are used for preheating feeding liquid and air conveyed in the reactor inlet pipe, so that fuel raw material methanol is combusted more sufficiently; the energy consumption, the material consumption and the carbon emission intensity of methanol hydrogen production are reduced, so that the hydrogen cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of methanol-to-hydrogen technology, specifically to a microchannel reactor for methanol-to-hydrogen production. Background Technology

[0002] Methanol-to-hydrogen (MTH) is an important hydrogen production route with advantages such as wide availability of raw materials and convenient transportation and storage. However, current MTH processes generally suffer from high energy consumption, high material consumption, high hydrogen costs, and high carbon emission intensity, which severely restricts its large-scale application and promotion. With increasingly stringent environmental regulations and ever-increasing energy efficiency requirements, there is an urgent need for in-depth innovation and system optimization of MTH technology to improve its economic viability.

[0003] Energy conservation and consumption reduction in the methanol-to-hydrogen process is a key technical challenge to improve its economic efficiency. The aim is to reduce the energy consumption, material consumption, and carbon emission intensity of methanol-to-hydrogen, and to reduce the cost of hydrogen. In response to the above issues, this application proposes a microchannel reactor for methanol-to-hydrogen. Utility Model Content

[0004] I. Technical problems to be solved

[0005] The technical problem this invention aims to solve is how to save energy and reduce consumption in the methanol-to-hydrogen process, thereby lowering the cost of hydrogen.

[0006] II. Technical Solution

[0007] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a microchannel reactor for methanol-to-hydrogen production, comprising a microchannel reactor body and two sets of cover plates, the two sets of cover plates being installed on both sides of the microchannel reactor body, a mounting frame being connected between the microchannel reactor body and the lower side of the cover plates, a reactor inlet pipe and a reactor outlet pipe being installed on one side of the microchannel reactor body, the connecting ends of the reactor inlet pipe and the reactor outlet pipe passing through the cover plates;

[0008] A heat exchange component is installed on one side of the microchannel reactor body. The heat exchange component preheats the feed liquid and air in the reactor inlet pipe with the heat inside the microchannel reactor body.

[0009] The heat exchange assembly includes an insulation shell. Multiple sets of reactor inlet pipes and reactor outlet pipes are respectively connected to a feed pipe and an exhaust pipe. The feed pipe passes through the insulation shell, and its port is located on the outside of the insulation shell. The exhaust end of the exhaust pipe is connected to the insulation shell. A microchannel heat exchange assembly is installed inside the microchannel reactor body. The microchannel heat exchange assembly is connected to the insulation shell. The microchannel heat exchange assembly uses the heat inside the microchannel reactor body to heat the air and sends the hot air to the insulation shell.

[0010] As an improvement, the microchannel heat exchange component includes a gas guide pipe, the middle of which is located on one side of the methanol combustion porous plate in the microchannel reactor body. One end of the gas guide pipe is connected to a gas pump, and the other end is connected to the insulation shell.

[0011] As an improvement, the portion of the feed pipe located inside the insulation shell is a heat-conducting pipe.

[0012] As an improvement, multiple sets of hot water exchange pipes pass through the lower side wall of the insulation shell. The hot water exchange pipes have a serpentine structure in the insulation shell and are wrapped around the outside of the heat conduction pipe.

[0013] As an improvement, the top of the insulation shell is connected to an exhaust control valve, and an exhaust pipe is installed at the exhaust end of the exhaust control valve.

[0014] As an improvement, the reactor inlet pipe includes a methanol inlet pipe for combustion feedstock and an air inlet pipe, and the reactor outlet pipe is a combustion gas outlet pipe.

[0015] III. Beneficial Effects

[0016] The advantages of this invention compared to the prior art are as follows: A heat exchange component is added to one side of the microchannel reactor body. The heat of combustion discharged from the microchannel reactor body and the heat exchange component exchanged inside the microchannel reactor body are used to preheat the feed liquid and air transported in the reactor inlet pipe, so that the fuel raw material methanol is burned more completely, reducing the energy consumption, material consumption and carbon emission intensity of methanol to hydrogen, thereby reducing the cost of hydrogen. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the front structure of a microchannel reactor for methanol-to-hydrogen production according to this utility model.

[0018] Figure 2 This is a schematic diagram of the rear structure of a microchannel reactor for methanol-to-hydrogen production according to the present invention.

[0019] Figure 3 This is a schematic diagram of the lower structure of a microchannel reactor for methanol-to-hydrogen production according to this utility model.

[0020] Figure 4 This is a schematic diagram of the internal structure of the heat-insulating shell of a microchannel reactor for methanol-to-hydrogen production according to this utility model.

[0021] As shown in the figure: 1. Microchannel reactor body; 2. Cover plate; 3. Mounting frame; 4. Insulation shell; 5. Gas guide pipe; 6. Air pump; 7. Reactor outlet pipe; 8. Exhaust pipe one; 9. Exhaust control valve; 10. Exhaust pipe two; 11. Reactor inlet pipe; 12. Feed pipe; 13. Hot water exchange pipe; 14. Heat conduction pipe. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] Example 1

[0024] As attached Figure 1 and attached Figure 2 As shown, a microchannel reactor for methanol-to-hydrogen includes a microchannel reactor body 1 and two sets of cover plates 2. The two sets of cover plates 2 are installed on both sides of the microchannel reactor body 1. A mounting frame 3 is connected between the microchannel reactor body 1 and the lower side of the cover plates 2. The mounting frame 3 is used to position and install the microchannel reactor body 1 and the cover plates 2. A reactor inlet pipe 11 and a reactor outlet pipe 7 are installed on one side of the microchannel reactor body 1. The reactor inlet pipe 11 includes a methanol inlet pipe and an air inlet pipe. Methanol and air are fed into the microchannel reactor body 1 through the methanol inlet pipe and the air inlet pipe, respectively, for combustion. The reactor outlet pipe 7 is a combustion gas outlet pipe. The connecting ends of the reactor inlet pipe 11 and the reactor outlet pipe 7 pass through the cover plates 2 and are connected to an external connecting conduit.

[0025] As attached Figure 1 and attached Figure 4 As shown, a heat exchange assembly is installed on one side of the microchannel reactor body 1. The heat exchange assembly includes an insulation shell 4. Multiple sets of reactor inlet pipes 11 and reactor outlet pipes 7 are respectively connected to feed pipes 12 and exhaust pipes 8. The feed pipe 12 passes through the insulation shell 4, and its port is located on the outside of the insulation shell 4. The part of the feed pipe 12 inside the insulation shell 4 is a heat-conducting pipe 14. The exhaust end of the exhaust pipe 8 is connected to the insulation shell 4, and the high-heat combustion gas is sent to the insulation shell 4. At this time, the temperature of the high-heat combustion gas sent to the insulation shell 4 can reach 500-800℃. The high-temperature gas gathers inside the insulation shell 4 to preheat the feed liquid and air in the reactor inlet pipe 11, so that the temperature of the feed liquid and air in the reactor inlet pipe 11 reaches 200-300℃, close to the reaction temperature, and then is sent to the microchannel reactor body 1, so that the fuel raw material methanol is burned more completely.

[0026] Multiple sets of hot water exchange pipes 13 pass through the lower side wall of the insulation shell 4. The hot water exchange pipes 13 have a serpentine structure in the insulation shell 4 and are wrapped around the outside of the heat conduction pipe 14. The hot water exchange pipes 13 are connected to water supply and collection devices and transport industrial water inside. The hot water exchange pipes 13 can perform rapid heat exchange inside the insulation shell 4 to achieve energy utilization efficiency. Furthermore, by controlling the flow rate of industrial water inside the hot water exchange pipes 13, the temperature around the heat conduction pipe 14 can be controlled to prevent the heat exchange temperature inside the heat conduction pipe 14 from becoming too high, reaching 300-400℃, which would cause premature combustion of methanol and damage to the equipment.

[0027] The top of the insulation shell 4 is connected to an exhaust control valve 9, and an exhaust pipe 10 is installed at the exhaust end of the exhaust control valve 9. By controlling the exhaust speed of the exhaust pipe 10 through the exhaust control valve 9, the pressure and temperature inside the insulation shell 4 can be adjusted.

[0028] Example 2

[0029] Based on Example 1, in order to improve the utilization rate of internal heat of the microchannel reactor body 1, as shown in the attached... Figure 3 and attached Figure 4 As shown, a microchannel heat exchange assembly is installed inside the microchannel reactor body 1. The microchannel heat exchange assembly includes a gas guide pipe 5. The middle part of the gas guide pipe 5 is located on one side of the methanol combustion porous plate in the microchannel reactor body 1. One end of the gas guide pipe 5 is connected to a gas pump 6, and the other end is connected to the insulation shell 4. The gas pump 6 is connected to an external power source. When the gas pump 6 is started, outside air is sent to the gas guide pipe 5. The air inside the gas guide pipe 5 undergoes heat exchange inside the microchannel reactor body 1, and the high-temperature gas after heat exchange is sent to the insulation shell 4 through the gas guide pipe 5 as an auxiliary heating module to supplement the heat exchange of the heat pipe 14 with high-temperature gas.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0032] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A microchannel reactor for methanol-to-hydrogen production, comprising a microchannel reactor body (1) and two sets of cover plates (2), the two sets of cover plates (2) being installed on both sides of the microchannel reactor body (1), a mounting bracket (3) connecting the lower sides of the microchannel reactor body (1) and the cover plates (2), a reactor inlet pipe (11) and a reactor outlet pipe (7) being installed on one side of the microchannel reactor body (1), the connecting ends of the reactor inlet pipe (11) and the reactor outlet pipe (7) passing through the cover plates (2), characterized in that: A heat exchange component is installed on one side of the microchannel reactor body (1). The heat exchange component preheats the feed liquid and air in the reactor inlet pipe (11) with the heat inside the microchannel reactor body (1). The heat exchange assembly includes an insulation shell (4). Multiple sets of reactor inlet pipes (11) and reactor outlet pipes (7) are respectively connected to feed pipes (12) and exhaust pipes (8). The feed pipes (12) pass through the insulation shell (4) and the port is located outside the insulation shell (4). The exhaust end of the exhaust pipes (8) is connected to the insulation shell (4). A microchannel heat exchange assembly is installed inside the microchannel reactor body (1). The microchannel heat exchange assembly is connected to the insulation shell (4). The microchannel heat exchange assembly uses the heat inside the microchannel reactor body (1) to heat the air and sends the hot air to the insulation shell (4).

2. The microchannel reactor for methanol-to-hydrogen production according to claim 1, characterized in that: The microchannel heat exchange assembly includes a gas guide pipe (5), the middle part of which is located on one side of the methanol combustion porous plate in the microchannel reactor body (1). One end of the gas guide pipe (5) is connected to a gas pump (6), and the other end is connected to the heat insulation shell (4).

3. A microchannel reactor for methanol-to-hydrogen production according to claim 2, characterized in that: The portion of the feed pipe (12) located inside the insulation shell (4) is a heat-conducting pipe (14).

4. A microchannel reactor for methanol-to-hydrogen production according to claim 3, characterized in that: Multiple sets of hot water exchange pipes (13) pass through the lower side wall of the heat insulation shell (4). The hot water exchange pipes (13) are serpentine tubes in the heat insulation shell (4) and are wrapped around the outside of the heat conduction pipe (14).

5. A microchannel reactor for methanol-to-hydrogen production according to claim 2, characterized in that: The top of the insulation shell (4) is connected to an exhaust control valve (9), and an exhaust pipe (10) is installed at the exhaust end of the exhaust control valve (9).

6. A microchannel reactor for methanol-to-hydrogen production according to claim 1, characterized in that: The reactor inlet pipe (11) includes a methanol inlet pipe and an air inlet pipe, and the reactor outlet pipe (7) is a combustion gas outlet pipe.

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