Hydrogenation reactor for producing hydrogen from methanol

Abstract

The hydrogenation reactor comprises a straight pipe reaction pipe and a variable-diameter diffusion pipe, the variable-diameter diffusion pipe is communicated with the top end of the straight pipe reaction pipe, the top end of the variable-diameter diffusion pipe is communicated with a straight diffusion pipe, partition plates are fixedly installed on the inner walls of the top end and the bottom end of the variable-diameter diffusion pipe, and the partition plates are connected with the straight diffusion pipe. A plurality of vent holes are formed in the upper surfaces of the two partition plates, and a shell is fixedly mounted on the outer surface of the straight pipe reaction pipe. According to the hydrogenation reactor heating device, the straight pipe reaction pipe, the variable-diameter diffusion pipe, the straight diffusion pipe, the fixed seat, the mounting block, the heating pipe, the fixed sleeve, the fixed bolt and other parts are matched, so that the function of quickly and conveniently dismounting the heating device is realized, and the fixing mode of the heating device in the existing hydrogenation reactor is improved; therefore, the heating device can be quickly disassembled and assembled, so that the heating device can be conveniently maintained and replaced, the influence on normal use of the hydrogenation reactor is avoided, and the practicability of the hydrogenation reactor is improved.

Description

Technical Field

[0001] This utility model relates to the field of methanol-to-hydrogen technology, and in particular to a hydrogenation reactor for methanol-to-hydrogen production. Background Technology

[0002] Hydrogen is a promising renewable energy source, and there are various methods for producing hydrogen, including methanol reforming. In the process of producing hydrogen from methanol reforming, the raw materials methanol and water are heated until they are vaporized to form a mixed gas composed of gaseous methanol and water vapor. This mixed gas then enters a hydrogenation reactor where a catalyst catalyzes the reaction of the mixed gas to produce a converted gas composed of hydrogen, carbon monoxide, carbon dioxide, and other components. The converted gas is then cooled and purified to obtain high-purity hydrogen.

[0003] In existing technologies, when a mixture of gaseous methanol and water vapor reacts in a hydrogenation reactor, it needs to be heated by a heating device within the reactor. However, most existing heating devices in hydrogenation reactors are fixedly installed inside the reactor. This design makes it inconvenient to disassemble and reassemble the heating device when it malfunctions and needs repair or replacement, thus affecting the normal operation of the hydrogenation reactor and reducing its practicality. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a hydrogenation reactor for methanol-to-hydrogen production.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a hydrogenation reactor for methanol-to-hydrogen production, comprising a straight-tube reaction tube and a variable-diameter diffuser tube. The variable-diameter diffuser tube is connected to the top end of the straight-tube reaction tube, and the top end of the variable-diameter diffuser tube is connected to the straight diffuser tube. Baffles are fixedly installed on the inner walls of both the top and bottom ends of the variable-diameter diffuser tube. Multiple vent holes are provided on the upper surfaces of both baffles. A shell is fixedly installed on the outer surface of the straight-tube reaction tube. A fixing seat is provided on the lower surface of the shell. An mounting block is fixedly installed on the upper surface of the fixing seat. A heating tube is fixedly installed on the upper surface of the mounting block. A fixing sleeve is fixedly installed on the lower surface of the shell. Two fixing bolts are threadedly connected to the outer surface of the fixing sleeve. A sealing assembly is provided on the outer surface of the fixing seat.

[0006] As a further description of the above technical solution:

[0007] The outer surface of the outer shell is connected to an air extraction pipe, an injection pipe, and two gas filling pipes. The outer surfaces of the variable diameter diffuser and the straight diffuser are both connected to an air inlet pipe. An air outlet pipe is fixedly installed on the outer surface of the straight diffuser.

[0008] As a further description of the above technical solution:

[0009] A limiting block is fixedly installed on the inner wall of the straight tube reaction tube. A limiting groove is opened on the outer surface of the mounting block to slide and connect with the limiting block. A locking block is fixedly installed at the bottom of the outer surface of the fixing sleeve. A locking groove that matches the locking block is opened at the bottom of the fixing sleeve.

[0010] As a further description of the above technical solution:

[0011] Both fixing bolts penetrate the outer surface of the fixing sleeve, and the fixing bolts are inserted into the fixing seat.

[0012] As a further description of the above technical solution:

[0013] The sealing assembly includes a mounting groove formed on the outer surface of the fixing seat. An upper sealing gasket is provided on the upper surface of the fixing seat. A side sealing gasket is fixedly installed on the outer wall of the upper sealing gasket. Multiple positioning blocks are fixedly installed on the upper surface of the fixing seat. Fixing blocks are fixedly installed on the side walls at both ends of the side sealing gasket.

[0014] As a further description of the above technical solution:

[0015] The upper sealing gasket and the side sealing gasket are both close to each other in a circular shape. The lower surface of the upper sealing gasket has multiple positioning grooves, and the multiple positioning blocks are inserted into the corresponding positioning grooves.

[0016] As a further description of the above technical solution:

[0017] The side sealing gasket is disposed inside the mounting groove, and the inner wall of the mounting groove has two fixing grooves, and the two fixing blocks are respectively inserted into the corresponding fixing grooves.

[0018] This utility model has the following beneficial effects:

[0019] 1. Compared with existing technologies, this methanol-to-hydrogen hydrogenation reactor, through the coordination of components such as a straight reaction tube, a variable-diameter diffuser, a straight diffuser, a baffle plate, a shell, a gas extraction pipe, a feed pipe, a gas filling pipe, a gas inlet pipe, a gas outlet pipe, a fixing base, a mounting block, a heating tube, a limiting block, a fixing sleeve, a clamping block, and fixing bolts, achieves the function of quickly and conveniently assembling and disassembling the heating device. This improves the fixing method of the heating device in existing hydrogenation reactors, allowing for rapid disassembly and assembly of the heating device, facilitating maintenance and replacement of the heating device, avoiding interference with the normal use of the hydrogenation reactor, and enhancing the practicality of the hydrogenation reactor.

[0020] 2. Compared with existing technologies, this methanol-to-hydrogen hydrogenation reactor, through the cooperation of components such as the mounting groove, upper sealing gasket, side sealing gasket, positioning block, and fixing block, achieves the function of sealing between the fixed seat and the outer shell. By setting the upper sealing gasket and side sealing gasket on the outer surface of the fixed seat, the connection between the fixed seat and the outer shell is sealed, preventing gas in the straight tube reaction tube from leaking out through the gap between the fixed seat and the outer shell, thus improving the sealing performance of the hydrogenation reactor. At the same time, the upper sealing gasket and side sealing gasket can be replaced conveniently and quickly, saving time and effort. Based on the original technology, the practicality of the hydrogenation reactor is further improved. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural schematic diagram of a hydrogenation reactor for methanol-to-hydrogen production proposed in this utility model.

[0022] Figure 2 This is a schematic diagram of the internal structure of the variable-diameter diffuser tube of a hydrogenation reactor for methanol-to-hydrogen production proposed in this utility model.

[0023] Figure 3 This is a schematic diagram of the heating tube structure of a hydrogenation reactor for methanol-to-hydrogen production proposed in this utility model;

[0024] Figure 4 This is a schematic diagram of the sealing assembly structure of a hydrogenation reactor for methanol-to-hydrogen production proposed in this utility model;

[0025] Figure 5 This is a schematic diagram of the sealing gasket structure of a hydrogenation reactor for methanol-to-hydrogen production proposed in this utility model.

[0026] Legend:

[0027] 1. Straight reaction tube; 2. Variable diameter diffuser; 3. Straight diffuser; 4. Baffle plate; 5. Outer shell; 6. Extraction pipe; 7. Injection pipe; 8. Gas supply pipe; 9. Inlet pipe; 10. Outlet pipe; 11. Fixing base; 12. Mounting block; 13. Heating tube; 14. Limiting block; 15. Fixing sleeve; 16. Clamping block; 17. Fixing bolt; 18. Mounting groove; 19. Upper sealing gasket; 20. Side sealing gasket; 21. Positioning block; 22. Fixing block. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Reference Figures 1 to 5 This utility model provides a hydrogenation reactor for methanol-to-hydrogen production, comprising a straight tube reaction tube 1 and a variable-diameter diffuser tube 2. The variable-diameter diffuser tube 2 is connected to the top end of the straight tube reaction tube 1, and the top end of the variable-diameter diffuser tube 2 is connected to a straight diffuser tube 3. Baffles 4 are fixedly installed on the inner walls of both the top and bottom ends of the variable-diameter diffuser tube 2. Multiple vent holes are opened on the upper surface of both baffles 4. A shell 5 is fixedly installed on the outer surface of the straight tube reaction tube 1. A suction pipe 6, a feed pipe 7, and two gas filling pipes 8 are connected to the outer surface of the shell 5. Gas inlet pipes 9 are connected to the outer surfaces of both the variable-diameter diffuser tube 2 and the straight diffuser tube 3. A gas outlet pipe 10 is fixedly installed on the outer surface of the straight diffuser tube 3. A fixing seat 11 is provided on the lower surface of the shell 5. An mounting block 12 is fixedly installed on the upper surface of the fixing seat 11. A heating tube 13 is fixedly installed on the upper surface of the mounting block 12.

[0030] To facilitate the disassembly and assembly of the heating tube 13, a limiting block 14 is fixedly installed on the inner wall of the straight tube reaction tube 1. A limiting groove that slides and connects with the limiting block 14 is opened on the outer surface of the mounting block 12. A fixing sleeve 15 is fixedly installed on the lower surface of the outer shell 5. A locking block 16 is fixedly installed at the bottom of the outer surface of the fixing sleeve 15. A locking groove that matches the locking block 16 is opened at the bottom of the fixing sleeve 15. Two fixing bolts 17 are threadedly connected to the outer surface of the fixing sleeve 15. Both fixing bolts 17 penetrate the outer surface of the fixing sleeve 15 and are inserted into the fixing seat 11.

[0031] By setting up a straight reaction tube 1, a variable diameter diffuser 2, a straight diffuser 3, a baffle 4, an outer shell 5, a gas extraction pipe 6, a feed pipe 7, a gas filling pipe 8, a gas inlet pipe 9, a gas outlet pipe 10, a fixing base 11, a mounting block 12, a heating tube 13, a limiting block 14, a fixing sleeve 15, a locking block 16, and fixing bolts 17, the heating device can be quickly and conveniently disassembled and assembled. This improves the fixing method of the heating device in the existing hydrogenation reactor, allowing for quick disassembly and assembly, facilitating maintenance and replacement of the heating device, avoiding affecting the normal use of the hydrogenation reactor, and enhancing the practicality of the hydrogenation reactor.

[0032] A sealing assembly is provided on the outer surface of the fixing base 11. The sealing assembly includes a mounting groove 18, which is formed on the outer surface of the fixing base 11. An upper sealing gasket 19 is provided on the upper surface of the fixing base 11. A side sealing gasket 20 is fixedly installed on the outer wall of the upper sealing gasket 19. The side sealing gasket 20 is located inside the mounting groove 18. The upper sealing gasket 19 and the side sealing gasket 20 are close to each other at both ends and form a ring shape. A plurality of positioning blocks 21 are fixedly installed on the upper surface of the fixing base 11. A plurality of positioning grooves are formed on the lower surface of the upper sealing gasket 19. The plurality of positioning blocks 21 are inserted into the corresponding positioning grooves. Fixing blocks 22 are fixedly installed on the side walls at both ends of the side sealing gasket 20. Two fixing grooves are formed on the inner wall of the mounting groove 18. The two fixing blocks 22 are inserted into the corresponding fixing grooves respectively.

[0033] By setting the mounting groove 18, upper sealing gasket 19, side sealing gasket 20, positioning block 21, and fixing block 22, the function of sealing between the fixing seat 11 and the outer shell 5 is realized. By setting the upper sealing gasket 19 and side sealing gasket 20 on the outer surface of the fixing seat 11, the fixing seat 11 and the outer shell 5 are sealed, preventing gas in the straight tube reaction tube 1 from leaking out from the gap between the fixing seat 11 and the outer shell 5, thus improving the sealing performance of the hydrogenation reactor. At the same time, the upper sealing gasket 19 and side sealing gasket 20 can be replaced conveniently and quickly, saving time and effort. On the original basis, the practicality of the hydrogenation reactor is further improved.

[0034] Working principle: When using a hydrogenation reactor for methanol reforming to produce hydrogen, air is first extracted from the straight tube reactor 1, variable diameter diffuser 2, and straight diffuser 3 through the extraction pipe 6. Then, inert gas is introduced into the variable diameter diffuser 2 and straight diffuser 3 through the inlet pipe 9. Next, the heating tube 13 is started to heat up. When the heating tube 13 reaches a suitable temperature, the catalyst is added into the straight tube reactor 1 through the feed pipe 7. A mixture of gaseous methanol and water vapor is injected into the straight tube reactor 1 through the gas injection pipe 8. Under the action of the catalyst, the mixed gas reacts with the catalyst, and a converted gas composed of hydrogen, carbon monoxide, carbon dioxide and other components is generated. The converted gas spreads upward and enters the interior of the variable diameter diffuser 2 through the vent hole of the bottom partition 4. It continues to spread upward and enters the interior of the straight diffuser 3 through the vent hole of the top partition 4, thereby achieving diffusion of the converted gas and making the converted gas evenly distributed inside the straight diffuser 3. Then, the converted gas is extracted by the outlet pipe 10 and cooled and purified to obtain high-purity hydrogen.

[0035] When the heating tube 13 needs to be repaired or replaced, tighten the fixing bolt 17 so that the fixing bolt 17 extends away from the fixing sleeve 15. After the fixing bolt 17 separates from the fixing seat 11, the restriction and fixation on the fixing seat 11 are released. Then, the fixing seat 11 is pulled out from the inside of the fixing sleeve 15, and the locking block 16 slides out of the locking groove, thereby driving the mounting block 12 and the heating tube 13 to slide out from the inside of the straight tube reaction tube 1. The limiting block 14 slides out of the limiting groove, completing the disassembly of the heating tube 13. At this time, the heating tube 13 can be repaired. When the repair is completed or the heating tube 13 is replaced, bring the repaired or new heating tube 13 close to the bottom end of the straight tube reaction tube 1 and reverse the above operation to install the repaired or new heating tube 13 into the inside of the straight tube reaction tube 1. After installation, the upper sealing gasket 19 is tightly attached to the lower surface of the outer shell 5, and the side sealing gasket 20 is tightly attached to the inner wall of the fixing sleeve 15, thereby sealing the fixing seat 11 and the outer shell 5.

[0036] When it is necessary to replace the upper sealing gasket 19 and the side sealing gasket 20, pull both ends of the side sealing gasket 20 so that both fixing blocks 22 slide out of the fixing groove, releasing the restriction on the side sealing gasket 20. Then pull the upper sealing gasket 19 upward so that the positioning block 21 slides out of the positioning groove, releasing the restriction on the upper sealing gasket 19. At this time, the upper sealing gasket 19 and the side sealing gasket 20 can be removed from the fixing seat 11. Then take out the new upper sealing gasket 19 and the side sealing gasket 20, and repeat the above operation in reverse to fix the upper sealing gasket 19 and the side sealing gasket 20, thereby completing the replacement of the upper sealing gasket 19 and the side sealing gasket 20.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hydrogenation reactor for hydrogen production from methanol, comprising a straight tube reaction tube (1) and a variable-diameter diffusion tube (2), characterized in that: The variable-diameter diffusion pipe (2) is communicated at the top end of the straight pipe reaction tube (1), the top end of the variable-diameter diffusion pipe (2) is communicated with a straight diffusion pipe (3), the inner walls of the top end and the bottom end of the variable-diameter diffusion pipe (2) are fixedly installed with baffles (4), the upper surfaces of the two baffles (4) are each provided with a plurality of air holes, the outer surface of the straight pipe reaction tube (1) is fixedly installed with an outer shell (5), the lower surface of the outer shell (5) is provided with a fixing seat (11), the upper surface of the fixing seat (11) is fixedly installed with a mounting block (12), the upper surface of the mounting block (12) is fixedly installed with a heating pipe (13), the lower surface of the outer shell (5) is fixedly installed with a fixing sleeve (15), the outer surface of the fixing sleeve (15) is threadedly connected with two fixing bolts (17), and the outer surface of the fixing seat (11) is provided with a sealing assembly.

2. The hydrogenation reactor for hydrogen production from methanol according to claim 1, characterized in that: The outer surface of the outer shell (5) is communicated with a gas extraction pipe (6), a material injection pipe (7) and two gas injection pipes (8), the outer surfaces of the variable-diameter diffusion pipe (2) and the straight diffusion pipe (3) are each communicated with a gas inlet pipe (9), and the outer surface of the straight diffusion pipe (3) is fixedly installed with a gas outlet pipe (10).

3. The hydrogenation reactor for hydrogen production from methanol according to claim 1, characterized in that: The inner wall of the straight pipe reaction tube (1) is fixedly installed with a limiting block (14), the outer surface of the mounting block (12) is provided with a limiting groove in sliding connection with the limiting block (14), and the bottom end of the outer surface of the fixing sleeve (15) is fixedly installed with a clamping block (16).

4. The hydrogenation reactor for hydrogen production from methanol according to claim 1, characterized in that: Both the fixing bolts (17) penetrate through the outer surface of the fixing sleeve (15), and the fixing bolts (17) are inserted into the fixing seat (11).

5. The hydrogenation reactor for hydrogen production from methanol according to claim 1, characterized in that: The sealing assembly comprises a mounting groove (18) formed in the outer surface of the fixing seat (11), an upper sealing gasket (19) arranged on the upper surface of the fixing seat (11), a side sealing gasket (20) fixedly installed on the outer wall of the upper sealing gasket (19), a plurality of positioning blocks (21) fixedly installed on the upper surface of the fixing seat (11), and a fixing block (22) fixedly installed on the side wall of each of the two ends of the side sealing gasket (20).

6. The hydrogenation reactor for hydrogen production from methanol according to claim 5, characterized in that: The upper sealing gasket (19) and the side sealing gasket (20) are annular and arranged close to each other, the lower surface of the upper sealing gasket (19) is provided with a plurality of positioning grooves, and the positioning blocks (21) are inserted into the corresponding positioning grooves.

7. The hydrogenation reactor for hydrogen production from methanol according to claim 5, characterized in that: The side sealing gasket (20) is arranged in the mounting groove (18), the inner wall of the mounting groove (18) is provided with two fixing grooves, and the fixing blocks (22) are respectively inserted into the corresponding fixing grooves.

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