Spiral heat exchange device for methanol cracking hydrogen production

Abstract

The utility model relates to the technical field of methanol cracking hydrogen production, in particular to a spiral heat exchange device for methanol cracking hydrogen production, which comprises an outer shell and a sealing cover, a sealing part is arranged at one end of the sealing cover, and four end feet of the rear end face of the sealing cover are fixedly connected with mounting blocks. Mounting plates clamped into the four mounting blocks are fixedly connected to one end of the sealing part, through holes are formed in the left sides and the right sides of the interiors of the four mounting blocks, springs are fixedly connected to the front ends and the rear ends of the interiors of the through holes, clamping plates are fixedly connected to one ends of the two springs, and a plurality of evenly-arranged threaded fixing holes are formed in the sealing cover; a plurality of evenly-arranged mounting holes are formed in the mounting plate, and inserting rods are connected into the mounting holes in a penetrating mode. Through the detachable and replaceable structure at the sealing position, the service life of the sealing cover is prolonged, the replacement cost is reduced, meanwhile, the impact resistance of the shell is enhanced, and the service life of the heat exchange device is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of methanol cracking for hydrogen production technology, and in particular to a spiral heat exchanger for methanol cracking for hydrogen production. Background Technology

[0002] Methanol cracking to produce hydrogen refers to the process of generating hydrogen by cracking methanol under specific conditions. This process is usually carried out under certain temperature and pressure conditions and requires the participation of a catalyst. The process includes a heat exchange step, in which heat exchangers are used to perform heat exchange during the hydrogen production process. A heat exchanger is made of one or more sets of heat exchange tubes placed in a shell. During use, hot fluid flows into the heat exchange tubes and cold fluid flows into the shell. The cold fluid comes into contact with the heat exchange tubes to achieve heat exchange.

[0003] Regarding the prior art patent CN217818264U, which discloses a spiral tube heat exchanger, a shell is included. A spiral heat exchange tube is disposed within the shell, arranged along the height direction of the shell. The upper end of the spiral heat exchange tube is connected to a tube-side inlet tube, with the end of the inlet tube extending away from the spiral heat exchange tube to the outside of the shell. The lower end of the spiral heat exchange tube is connected to a tube-side outlet tube, with the end of the outlet tube extending away from the spiral heat exchange tube to the outside of the shell. The top and bottom of the shell are respectively connected to a shell-side outlet tube and a shell-side inlet tube. Several heat exchange fins are fixedly connected to the outer wall of the spiral heat exchange tube. A rotating cap is rotatably connected to the inner wall of the shell, and several rotating rods are fixedly connected to the rotating cap. This utility model... The spiral heat exchange tube design increases the flow path of the hot fluid within the tubes and also increases the contact area between the tubes and the cold fluid, allowing for more thorough heat exchange. Furthermore, heat exchange fins on the outer wall of the spiral heat exchange tubes further increase this contact area, enhancing the heat exchange effect. The shell is designed with a double-layer structure, forming a cavity between the outer and inner shells. This cavity contains insulation and sound-absorbing cotton. The insulation provides excellent heat preservation, preventing heat loss during heat exchange and reducing efficiency. The sound-absorbing cotton effectively reduces noise generated by fluid flow during heat exchange within the shell.

[0004] However, the existing heat exchanger is connected at both ends by flanges, and the gasket on the inner wall of the sealing cover at one end will age due to long-term use, thus affecting the sealing effect and requiring the replacement of the entire sealing cover, which wastes costs. At the same time, the existing heat exchanger has weak impact resistance, and when it encounters a large impact, it will cause certain damage to the heat exchanger and affect its normal use. Utility Model Content

[0005] In order to overcome the problems of existing heat exchange devices where long-term use causes the sealing rings to age, affecting the sealing effect, and the heat exchange devices have poor impact resistance, which affects the service life of the device.

[0006] The technical solution of this utility model is as follows: a spiral heat exchanger for methanol cracking to produce hydrogen, including an outer shell and a sealing cover. One end of the sealing cover is provided with a sealing part. Four mounting blocks are fixedly connected to the four ends of the rear end face of the sealing cover. One end of the sealing part is fixedly connected to a mounting plate that snaps into the four mounting blocks. Through holes are opened on the left and right sides inside the four mounting blocks. Springs are fixedly connected to the front and rear ends inside the through holes. One end of each of the two springs is fixedly connected to a clamping plate. Multiple evenly arranged threaded fixing holes are opened inside the sealing cover. Multiple evenly arranged mounting holes are opened inside the mounting plates. Insert rods are connected through the mounting holes. A threaded rod is fixedly connected to the lower end face of the insert rod and is inserted into and engaged with the threaded fixing hole. A fixing groove is opened on the surface of the insert rod. Sealing gaskets are fixedly sleeved on the upper and lower ends of the sealing part. A sealing groove is opened on the inner wall of the outer shell. The outer shell includes a reinforcing layer, a high-temperature resistant layer, and an impact-resistant layer.

[0007] Preferably, the overall hardness is improved by the internal reinforcement layer of the outer shell, while the high-temperature resistant layer can improve the high-temperature resistance. The high-temperature resistant layer is made of polyimide material. The impact resistance of the impact-resistant layer improves its practicality. The outer shell is made of nickel-titanium alloy, which includes high-temperature resistance and impact resistance.

[0008] Preferably, a shell-side inlet pipe is fixedly connected to one side of the upper surface of the outer casing, and a shell-side outlet pipe is fixedly connected to the other side of the upper surface of the outer casing away from the shell-side inlet pipe.

[0009] Preferably, connecting flanges are fixedly connected to both the left and right sides of the outer casing, and the sealing cover is connected to the outer casing through the connecting flanges.

[0010] Preferably, support plates are fixedly connected to both the left and right sides of the lower end face of the outer casing, a spiral tube inlet is connected through the inside of the sealing cover, and a spiral tube outlet is provided below the spiral tube inlet, which is connected through the sealing cover.

[0011] Preferably, the reinforcing layer, high-temperature resistant layer, and impact-resistant layer are all bonded together by adhesive layers, and the outer shell is made of nickel-titanium alloy, which has high heat resistance and corrosion resistance and can maintain good strength and stability under thermal shock.

[0012] Preferably, the sealing gasket is inserted into the sealing groove, the sealing part is inserted into the inside of the outer casing, and the inside of the sealing part has a flow hole.

[0013] Preferably, the threaded rod is inserted into the threaded fixing hole, and the clamping plate is inserted into the fixing groove.

[0014] Preferably, the reinforcing layer is bonded to a high-temperature resistant layer, and the high-temperature resistant layer is bonded to an impact-resistant layer.

[0015] The beneficial effects of this utility model are:

[0016] 1. This spiral heat exchanger for methanol cracking to produce hydrogen uses a rotating insert rod to engage the threaded rod on its lower end face with the threaded fixing hole and then slowly disengage it. Simultaneously, the clamping plate is slowly squeezed within the fixing groove, eventually disengaging from the groove. Finally, by pulling the insert rod upwards, it disengages from the through hole, allowing for disassembly of the device. The sealing part can then be removed. During installation, the sealing part and the sealing cover are fixed by rotating the insert rod and threaded rod in the opposite direction. Two sealing gaskets are inserted into the sealing groove to enhance the sealing effect. The detachable sealing part allows for easy replacement, preventing aging of the sealing part over time and reducing the need to replace the entire sealing cover, thus lowering replacement costs.

[0017] 2. The spiral heat exchanger for methanol cracking to produce hydrogen improves the overall hardness through the internal reinforcement layer of the outer shell, while the high-temperature resistant layer improves the high-temperature resistance. The high-temperature resistant layer is made of polyimide material, and the impact-resistant layer enhances its practicality. The outer shell is made of nickel-titanium alloy, which includes high-temperature resistance and impact resistance. Attached Figure Description

[0018] Figure 1 The diagram shown is a three-dimensional structural schematic of the spiral heat exchange device of this utility model.

[0019] Figure 2 The diagram shown is a three-dimensional structural schematic of the sealing structure of this utility model.

[0020] Figure 3 This utility model is shown. Figure 2 A magnified schematic diagram of the three-dimensional structure at point A;

[0021] Figure 4 The diagram shown is a three-dimensional cross-sectional view of the sealing connection structure of this utility model.

[0022] Figure 5 This utility model is shown. Figure 4 A magnified schematic diagram of the three-dimensional structure at point B;

[0023] Figure 6 The diagram shown is a schematic diagram of the material cross-section structure of the spiral heat exchanger of this utility model.

[0024] Explanation of reference numerals in the attached drawings: 1. Outer shell; 2. Shell-side inlet pipe; 3. Shell-side outlet pipe; 4. Spiral inlet pipe; 5. Spiral outlet pipe; 6. Sealing cap; 7. Connecting flange; 8. Sealing part; 9. Sealing gasket; 10. Sealing groove; 11. Mounting plate; 12. Mounting block; 13. Insert rod; 14. Fixing groove; 15. Threaded rod; 16. Threaded fixing hole; 17. Through hole; 18. Clamping plate; 19. Spring; 20. Reinforcing layer; 21. Adhesive layer; 22. High temperature resistant layer; 23. Impact resistant layer. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Please see Figures 1-6 This utility model provides an embodiment of a spiral heat exchanger for methanol cracking to produce hydrogen, comprising an outer shell 1 and a sealing cover 6. One end of the sealing cover 6 has a sealing portion 8. Four mounting blocks 12 are fixedly connected to the four ends of the rear end face of the sealing cover 6. One end of the sealing portion 8 is fixedly connected to a mounting plate 11 that snaps into the interior of the four mounting blocks 12. Through holes 17 are provided on both the left and right sides inside the four mounting blocks 12. Springs 19 are fixedly connected to the front and rear ends of the through holes 17. One end of each spring 19 is fixedly connected to a clamping plate 18. The sealing cover 6 has multiple evenly arranged threaded fixing holes 16 inside, and the mounting plate 11 has multiple evenly arranged mounting holes inside. Each mounting hole is connected to a rod 13 through it. The lower end of the rod 13 is fixedly connected to a threaded rod 15 that is inserted into and engaged with the threaded fixing hole 16. The surface of the rod 13 is provided with a fixing groove 14. The upper and lower ends of the sealing part 8 are fixedly fitted with sealing gaskets 9. The inner wall of the outer shell 1 is provided with a sealing groove 10. The outer shell 1 includes a reinforcing layer 20, a high-temperature resistant layer 22, and an impact-resistant layer 23.

[0027] Please see Figure 1In this embodiment, a shell-side inlet pipe 2 is fixedly connected to one side of the upper surface of the outer casing 1, and a shell-side outlet pipe 3 is fixedly connected to the other side of the upper surface of the outer casing 1 away from the shell-side inlet pipe 2. Connecting flanges 7 are fixedly connected to both the left and right sides of the outer casing 1. The sealing cover 6 is connected to the outer casing 1 via the connecting flanges 7. Support plates are fixedly connected to both the left and right sides of the lower surface of the outer casing 1. A spiral tube inlet pipe 4 is penetrated through the interior of the sealing cover 6. A spiral tube outlet pipe 5, which penetrates through the sealing cover 6, is provided below the spiral tube inlet pipe 4. The sealing cover 6 is inserted by aligning the sealing part 8 on one side with the interior of the outer casing 1. As the sealing part 8 is inserted, the two sealing gaskets 9 on the outer ring of the sealing part 8 are also inserted into the sealing groove 10, thereby improving the overall sealing effect. The sealing part 8 can be disassembled and replaced. By rotating the insertion rod 13, the threaded rod 15 on the lower end face of the insertion rod 13 rotates and engages with the threaded fixing hole 16 and slowly disengages. At the same time as the rotation, the clamping plate 18 rotates inside the fixing groove 14. When the threaded rod 15 disengages from the threaded fixing hole 16, the clamping plate 18 is also squeezed, which compresses the spring 19 at one end and disengages from the fixing groove 14. Finally, the insertion rod 13 is pulled out from the through hole 17 to complete the disassembly.

[0028] Please see Figures 2-6 In this embodiment, the reinforcing layer 20, the high-temperature resistant layer 22, and the impact-resistant layer 23 are all bonded and fixed together by an adhesive layer 21. The outer shell 1 is made of nickel-titanium alloy, which has high heat resistance and corrosion resistance and can maintain good strength and stability under thermal shock. The sealing gasket 9 is inserted into the sealing groove 10, the sealing part 8 is inserted into the inner shell 1, and the sealing part 8 has a flow hole inside. The threaded rod 15 is engaged and inserted into the threaded fixing hole 16, and the clamping plate 18 is inserted into the fixing groove 14. The reinforcing layer 20 is attached to the high-temperature resistant layer 22, and the high-temperature resistant layer 22 is attached to the impact-resistant layer 23. The reinforcing layer 20 inside the outer shell 1 increases its hardness, thereby extending its service life. At the same time, the high-temperature resistant layer 22 inside it can play a role in high temperature resistance, and the impact-resistant layer 23 can withstand impact force. The overall material can improve the service life of the heat exchange device.

[0029] During operation, the sealing part 8 on one side of the sealing cover 6 is aligned with the inside of the outer shell 1 and inserted. Simultaneously, the two sealing gaskets 9 on the outer ring of the sealing part 8 are also inserted into the sealing groove 10, thereby improving the overall sealing effect. The sealing part 8 can be disassembled and replaced. By rotating the insert rod 13, the threaded rod 15 on the lower end face of the insert rod 13 rotates and engages with the threaded fixing hole 16, slowly disengaging. Simultaneously, the clamping plate 18 rotates inside the fixing groove 14. When the threaded rod 15 disengages from the threaded fixing hole 16, the clamping plate 18 is also compressed, causing the spring 19 at one end to be compressed and disengaged from the fixing groove 14. Finally, the insert rod 13 is pulled out from the through hole 17 to complete disassembly, allowing the sealing part 8 to be removed from the through hole. During installation, the mounting plate 11 on one side of the sealing part 8 is aligned with the inside of the sealing cover 6, so that the mounting block 12 snaps into it. Then, the insert rod 13 and the threaded rod 15 are inserted into the through hole 17 and passed through. Finally, rotate the rod so that the threaded rod 15 engages and is inserted into the threaded fixing hole 16 for fixation. At the same time, the clamping plate 18 is also snapped into the fixing groove 14 to improve the fixing effect, thus completing the installation of the sealing part 8. The reinforcing layer 20 inside the outer shell 1 increases its hardness, thereby extending its service life. At the same time, the high temperature resistant layer 22 inside can resist high temperature, and the impact-resistant layer 23 can withstand impact. The overall material can improve the service life of the heat exchange device.

[0030] Through the above steps, by rotating the insert rod 13, the threaded rod 15 on its lower end face is engaged with the threaded fixing hole 16 and slowly disengaged. At the same time, the clamping plate 18 is also slowly squeezed in the fixing groove 14 and finally disengaged from the fixing groove 14. Finally, by pulling the insert rod 13 upward, it is disengaged from the through hole 17, and the disassembly can be completed. This solves the problem that the existing heat exchange device will cause the sealing ring to age after long-term use, affecting the sealing effect, and the heat exchange device has poor impact resistance, which affects the service life of the device.

Claims

1. A spiral heat exchanger for methanol cracking to produce hydrogen, comprising an outer shell (1), characterized in that: It also includes a sealing cover (6), one end of which is provided with a sealing part (8). The four ends of the rear face of the sealing cover (6) are fixedly connected to mounting blocks (12). One end of the sealing part (8) is fixedly connected to a mounting plate (11) that snaps into the four mounting blocks (12). The left and right sides of the four mounting blocks (12) are provided with through holes (17). The front and rear ends of the through holes (17) are fixedly connected to springs (19). One end of each of the two springs (19) is fixedly connected to a clamping plate (18). The interior of the sealing cover (6) is provided with multiple evenly arranged threaded fasteners. The mounting plate (11) has multiple evenly arranged mounting holes inside the mounting holes. Insert rods (13) are connected through the mounting holes. A threaded rod (15) is fixedly connected to the lower end of the insert rod (13) and engaged with it. A fixing groove (14) is opened on the surface of the insert rod (13). Sealing gaskets (9) are fixedly sleeved on the upper and lower ends of the sealing part (8). A sealing groove (10) is opened on the inner wall of the outer shell (1). The outer shell (1) includes a reinforcing layer (20), a high temperature resistant layer (22), and an impact resistant layer (23).

2. The spiral heat exchanger for methanol cracking to hydrogen production according to claim 1, characterized in that: A shell-side inlet pipe (2) is fixedly connected to one side of the upper surface of the outer shell (1), and a shell-side outlet pipe (3) is fixedly connected to the other side of the upper surface of the outer shell (1) away from the shell-side inlet pipe (2).

3. The spiral heat exchanger for methanol cracking to hydrogen production according to claim 1, characterized in that: Connecting flanges (7) are fixedly connected to both the left and right sides of the outer casing (1), and the sealing cover (6) is connected to the outer casing (1) through the connecting flanges (7).

4. The spiral heat exchanger for methanol cracking to hydrogen production according to claim 1, characterized in that: Support plates are fixedly connected to the left and right sides of the lower end face of the outer shell (1). A spiral tube inlet (4) is connected through the inside of the sealing cover (6). A spiral tube outlet (5) is provided below the spiral tube inlet (4) and is connected through the sealing cover (6).

5. The spiral heat exchanger for hydrogen production by methanol cracking according to claim 1, characterized in that: The reinforcing layer (20), the high-temperature resistant layer (22), and the impact-resistant layer (23) are all bonded and fixed together by an adhesive layer (21).

6. The spiral heat exchanger for methanol cracking to hydrogen production according to claim 1, characterized in that: The sealing gasket (9) is inserted into the sealing groove (10), the sealing part (8) is inserted into the outer shell (1), and the sealing part (8) has a flow hole inside.

7. The spiral heat exchanger for methanol cracking to hydrogen production according to claim 1, characterized in that: The threaded rod (15) is engaged and inserted into the threaded fixing hole (16), and the clamp (18) is inserted into the fixing groove (14). 8.The spiral heat exchanger for hydrogen production by methanol cracking according to claim 1, characterized in that: The reinforcing layer (20) is bonded to a high-temperature resistant layer (22), and the high-temperature resistant layer (22) is bonded to an impact-resistant layer (23).

Images