Heat exchanger for methanol-to-hydrogen heat exchange system

Abstract

The invention discloses a heat exchanger for a methanol-to-hydrogen heat exchange system, and relates to the technical field of energy-saving heat exchangers, the heat exchanger comprises a shell, end sockets respectively mounted at two ends of the shell and two tube plates mounted in the shell, and further comprises a tube bundle assembly comprising a plurality of tubes distributed along an annular track; a baffle plate; the independent cleaning mechanism comprises a driving block arranged on the outer wall of one side of one tube plate, a sealing block installed in the driving block, a high-voltage pulse tube installed in the sealing block and a displacement assembly used for driving the sealing block to move; the interior of the tube nest is cleaned one by one from the outer ring to the inner ring, the effect of non-stop cleaning of the heat exchanger is achieved, the problem that in the prior art, the interior of the tube nest can be cleaned only by dismounting the end socket is solved, the continuous use effect of the heat exchanger is guaranteed, and the adjustment plate is repeatedly driven to move left and right and the telescopic check curtain is unfolded and contracted. The formation of a dead zone in the shell is avoided, and scaling and corrosion are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of energy-saving heat exchangers, and in particular to a heat exchanger for a methanol-to-hydrogen heat exchange system. Background Art

[0002] In the methanol-to-hydrogen heat exchange system, the high-temperature gas generated by the methanol-to-hydrogen reaction is exchanged with the liquid raw materials required for methanol-to-hydrogen production to achieve cooling of the high-temperature gas and preheating of the liquid raw materials, thereby achieving the purpose of energy saving and environmental protection.

[0003] During long-term use, scale easily accumulates on the internal tubes of heat exchangers. If scale is not removed promptly, it will adversely affect heat exchange efficiency. Currently, when cleaning the internal tubes of heat exchangers, it is usually necessary to shut down the machine, remove the head, and then flush the tubes. To ensure that scale does not affect the heat exchange effect, it is often necessary to increase the frequency of tube cleaning, which will undoubtedly reduce the overall efficiency of methanol-to-hydrogen production. Summary of the Invention

[0004] The purpose of the present invention is to provide a heat exchanger for a methanol-to-hydrogen heat exchange system to solve the above-mentioned deficiencies in the prior art.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a heat exchanger for a methanol-to-hydrogen heat exchange system, comprising a shell, heads respectively mounted at both ends of the shell, and two tube sheets mounted inside the shell, and further comprising: The tube bundle assembly is provided with multiple groups, and the multiple groups of tube bundle assemblies are concentrically arranged from the inside to the outside. The tube bundle assembly includes a plurality of tubes distributed along an annular track, and the tubes are installed inside the two tube sheets; A plurality of baffles are provided, the baffles are distributed in sequence along the length direction of the shell and are staggered with each other, and the baffles are installed outside the plurality of tubes; An independent cleaning mechanism includes a drive block disposed on the outer wall of one side of one tube sheet, a sealing block installed inside the drive block, a high-pressure pulse tube installed inside the sealing block, and a displacement assembly for driving the sealing block to move. The other end of the high-pressure pulse tube extends to the outside of the head and is connected to a high-pressure pulse airflow generator. An electromagnet is installed inside the sealing block for adsorption and fixation with the tube sheet to facilitate the sealed connection between the high-pressure pulse tube and the tube array. The high-pressure pulse tube is a metal braided hose. The dead zone regulating mechanism comprises an regulating plate arranged inside the side of the baffle away from the notch thereof and an regulating component for driving the regulating plate to move.

[0006] Furthermore, one end of one of the sealing heads is rotatably connected to a driven disk, and the high-voltage pulse tube is arranged through the driven disk.

[0007] Furthermore, an air intake pipe and a feed pipe are installed on the top of the shell, and the feed pipe is located between the driven disc and one of the tube sheets; The air inlet pipe is located on a side of the other tube plate close to the driven disc.

[0008] Furthermore, a partition is installed inside the other head, and the tubes are arranged through the partition; The bottom of the shell is equipped with multiple drain pipes, material drain pipes and debris drain pipes. The material drain pipe is located between the partition and another tube plate. The debris drain pipe is located on the side of the partition away from the material drain pipe. A third solenoid valve is installed on the liquid drain pipe.

[0009] Furthermore, a slide groove is provided inside the driving block along its length direction, and the sealing block is slidably connected inside the slide groove; A first motor is installed on the outer wall of the other head, and the output shaft of the first motor passes through the baffle and the tube plate. One end of the driving block is fixedly sleeved on the outside of the output shaft of the first motor.

[0010] Furthermore, the displacement assembly includes a first screw rod rotatably connected to the inside of the slide groove and a second motor mounted on the outer wall of one end of the driving block, the output end of the second motor is fixedly connected to one end of the first screw rod, and a protective cover can be installed on the outside of the second motor for waterproofing; The sealing block is threadedly connected to the outside of the first screw rod.

[0011] Furthermore, a shunt pipe is installed on the outer wall of the tube array, and the shunt pipe is located between the partition plate and another tube plate. A first solenoid valve is installed on the shunt pipe, and a second solenoid valve is installed on the tube array.

[0012] Furthermore, a hidden groove is opened inside the deflector, the adjustment plate is located inside the hidden groove, and a retractable curtain is installed on the outer wall of the adjustment plate close to the center of the shell, and the other end of the retractable curtain is fixed to the inner wall of the hidden groove.

[0013] Furthermore, the adjustment assembly includes two second screw rods rotatably connected to the inside of the two tube sheets and a third motor mounted on the outer wall of the other head; One end of each of the two second screw rods extends to the outside of the head, and the third motor and the two second screw rods are connected to each other through a transmission assembly, and the transmission assembly includes two synchronous wheels fixedly sleeved on the outside of the third motor output shaft and the outside of the second screw rod, and a synchronous belt connected to the outside of the two synchronous wheels; Among them, a row of adjustment plates near the top of the shell are all threadedly connected to the outside of one of the second screw rods, and a row of adjustment plates near the bottom of the shell are all threadedly connected to the outside of the other second screw rod. The adjustment plates are also slidably sleeved on the outside of the tube array.

[0014] Compared with the prior art, the heat exchanger for a methanol-to-hydrogen heat exchange system provided by the present invention has the following beneficial effects: 1. By cleaning the inside of the tubes one by one from the outer ring to the inner ring, the heat exchanger can be cleaned without stopping. This solves the problem in the existing technology that the head must be removed to clean the inside of the tubes, ensuring the continuous use of the heat exchanger. 2. During the heat exchange process, the adjustment plate is repeatedly driven to move left and right and the telescopic curtain is expanded and contracted, thereby avoiding the formation of dead zones inside the shell and reducing scaling and corrosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction to the drawings required for use in the embodiments will be given below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of the internal structure of the shell and head of the present invention; Figure 3 It is a schematic structural diagram of the displacement assembly of the present invention; Figure 4 Schematic diagram of the structure of the tube sheet, partition, tube array and diverter tube of the present invention; Figure 5 Schematic diagram of the dead zone control mechanism structure of the present invention.

[0017] Description of reference numerals: 1. Shell; 2. Head; 3. Tube sheet; 4. Tube array; 5. Baffle; 6. Drive block; 7. Sealing block; 8. High-pressure pulse tube; 9. Adjustment plate; 10. Inlet pipe; 11. Feed pipe; 12. Partition; 13. Drain pipe; 14. Discharge pipe; 15. Drain pipe; 16. Chute; 17. First motor; 18. First screw rod; 19. Second motor; 20. Diverter pipe; 21. First solenoid valve; 22. Second solenoid valve; 23. Telescopic curtain; 24. Second screw rod; 25. Third motor; 26. Transmission assembly; 27. Driven disk. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0019] Example: See Figure 1-Figure 5A heat exchanger for a methanol-to-hydrogen heat exchange system includes a shell 1, heads 2 respectively installed at both ends of the shell 1, and two tube sheets 3 installed inside the shell 1, and further includes: The tube bundle assembly is provided with multiple groups, and the multiple groups of tube bundle assemblies are concentrically arranged from the inside to the outside. The tube bundle assembly includes a plurality of tubes 4 distributed along an annular track, and the tubes 4 are installed inside the two tube sheets 3; Baffles 5, of which a plurality is provided, the plurality of baffles 5 are sequentially distributed along the length direction of the shell 1 and are staggered with each other, and the baffles 5 are installed outside the plurality of tubes 4; An air inlet pipe 10 and a feed pipe 11 are installed on the top of the shell 1. The feed pipe 11 is located between the driven disc 27 and one of the tube sheets 3. The air inlet pipe 10 is located on the side of the other tube sheet 3 close to the driven disc 27. A partition 12 is installed inside the other head 2, and the tubes 4 are arranged through the partition 12. A plurality of drain pipes 13, a discharge pipe 14 and a drainage pipe 15 are installed at the bottom of the shell 1. The discharge pipe 14 is located between the partition 12 and the other tube sheet 3, and the drainage pipe 15 is located on the side of the partition 12 away from the discharge pipe 14. A third solenoid valve is installed on the drain pipe 13. Cooling water can be collected inside the drain pipe 13, and the third solenoid valve is regularly controlled to open to discharge condensed water. The third solenoid valve is not provided on the rightmost drain pipe 13, or the third solenoid valve on the rightmost drain pipe 13 remains open during the heat exchange process. The high-temperature gas generated by the methanol-to-hydrogen reaction is introduced into the shell 1 through the air inlet pipe 10, and the liquid raw material required for methanol-to-hydrogen production is introduced into the right-side head 2 through the feed pipe 11, and flows to the left through a plurality of tubes 4. The high-temperature gas flows in a curve from left to right along the baffles 5. In this process, the liquid raw material inside each tube 4 exchanges heat with the high-temperature gas to achieve cooling of the high-temperature gas and preheating of the liquid raw material. The high-temperature gas is gradually condensed into liquid and enters the drain pipe 13. After preheating, the liquid raw material flows through the diversion pipe 20 to between the tube plate 3 and the partition 12 on the left, and is discharged through the discharge pipe 14.

[0020] An independent cleaning mechanism includes a driving block 6 arranged on the outer wall of one side of one of the tube sheets 3, a sealing block 7 installed inside the driving block 6, a high-pressure pulse tube 8 installed inside the sealing block 7, and a displacement component for driving the sealing block 7 to move. The other end of the high-pressure pulse tube 8 extends to the outside of the head 2 and is connected to a high-pressure pulse airflow generator. An electromagnet is installed inside the sealing block 7 for being adsorbed and fixed together with the tube sheet 3 to facilitate the sealed docking of the high-pressure pulse tube 8 and the tube array 4. The high-pressure pulse tube 8 is a metal braided hose. One end of one of the heads 2 is rotatably connected to a driven disk 27. The high-pressure pulse tube 8 is arranged to penetrate the driven disk 27. A slide groove 16 is opened inside the driving block 6 along its length direction, and the sealing block 7 is slidably connected to the inner part of the slide groove 16 a first motor 17 is mounted on the outer wall of the other head 2, the output shaft of the first motor 17 passes through the baffle 5 and the tube sheet 3, one end of the drive block 6 is fixedly sleeved on the outside of the output shaft of the first motor 17, the displacement assembly includes a first screw rod 18 rotatably connected to the inside of the slide 16 and a second motor 19 mounted on the outer wall of one end of the drive block 6, the output end of the second motor 19 is fixedly connected to one end of the first screw rod 18, and a protective cover can be installed on the outside of the second motor 19 for waterproofing; the sealing block 7 is threadedly connected to the outside of the first screw rod 18, a shunt pipe 20 is mounted on the outer wall of the tube 4, the shunt pipe 20 is located between the partition 12 and the other tube sheet 3, a first solenoid valve 21 is mounted on the shunt pipe 20, and a second solenoid valve 22 is mounted on the tube 4; When it is necessary to clean the scale inside the tubes 4 one by one, the first motor 17 is controlled to drive the driving block 6 to rotate with its output shaft as the center, so that the high-pressure pulse tube 8 inside the sealing block 7 is sealed and connected to the end of one of the tubes 4 in the outermost circle, the first solenoid valve 21 is controlled to be closed, and the second solenoid valve 22 is controlled to be opened, and a high-pressure pulse airflow is introduced into the tube 4 through the high-pressure pulse airflow generator and the high-pressure pulse tube 8 to clean the dirt inside the tube 4. The cleaned dirt is discharged to the left side of the partition 12 and discharged through the exhaust pipe 15. After the cleaning of the tube 4 is completed, the first solenoid valve 21 is controlled to be opened and the second solenoid valve 22 is closed. Then the first motor 17 drives the driving block 6 to rotate, so that the high-pressure pulse tube 8 inside the sealing block 7 is sealed and connected to the end of the next tube 4 in the outermost circle. The rotation angle of the driving block 6 is related to the number of tubes 4 in each circle. For example, if the number of tubes 4 in the outermost circle is 20, the driving block 6 rotates 18° each time, and the number of tubes 4 in the outermost circle is 20. The amount is 30, and the driving block 6 rotates 12° each time. Similarly, the same is true for each inner ring. When the outermost ring of tubes 4 is cleaned in turn, the second motor 19 is controlled to drive the first screw 18 to rotate clockwise, driving the sealing block 7 and the high-pressure pulse tube 8 to move toward the center of the shell 1, so that the high-pressure pulse tube 8 is connected to the inner ring of tubes 4. Similarly, high-pressure pulse airflow is introduced into the interior of the tube 4 through the high-pressure pulse airflow generator and the high-pressure pulse tube 8 to clean the dirt inside the tube 4. Then, the first motor 17 is controlled to drive the driving block 6 to rotate with its output shaft as the center, so that the high-pressure pulse tube 8 inside the sealing block 7 is sealed and connected to the end of the next tube 4 in the same circle, and then the interior of the tube 4 is cleaned. In this cycle, from the outer ring to the inner ring, the interior of each tube 4 is cleaned in turn. By cleaning the interior of the tube 4 one by one, the effect of cleaning the heat exchanger without stopping is achieved, which solves the problem in the prior art that the head 2 needs to be removed to clean the interior of the tube 4.

[0021] The dead zone control mechanism includes an adjustment plate 9 arranged inside the baffle 5 away from the notch and an adjustment component for driving the adjustment plate 9 to move. A hidden groove is opened inside the baffle 5, and the adjustment plate 9 is located inside the hidden groove. A telescopic curtain 23 is installed on the outer wall of the adjustment plate 9 close to the center of the shell 1. The other end of the telescopic curtain 23 is fixed to the inner wall of the hidden groove. The adjustment component includes two second screw rods 24 rotatably connected to the inside of the two tube sheets 3 and a third motor 25 installed on the outer wall of the other head 2; one end of the two second screw rods 24 is extended. Extending to the outside of the head 2, the third motor 25 and the two second screw rods 24 are connected to each other through a transmission assembly 26. The transmission assembly 26 includes two synchronous wheels fixedly sleeved on the outside of the output shaft of the third motor 25 and the outside of the second screw rods 24, and a synchronous belt connected to the outside of the two synchronous wheels. Among them, a row of adjustment plates 9 near the top of the housing 1 are all threadedly connected to the outside of one of the second screw rods 24, and a row of adjustment plates 9 near the bottom of the housing 1 are all threadedly connected to the outside of the other second screw rods 24. The adjustment plates 9 are also slidably sleeved on the outside of the tube array 4. During the heat exchange process, according to the flow path of the high temperature gas, such as Figure 2 The position of the adjustment plate 9 shown is prone to forming a dead zone. By controlling the third motor 25 to drive its output shaft to rotate clockwise, the two transmission components 26 are used to connect the two second screw rods 24 to rotate synchronously clockwise, driving each adjustment plate 9 to move rightward along the outside of the array tube 4, and the telescopic curtain 23 is synchronously expanded to prevent the airflow from entering between the adjustment plate 9 and the deflector 5. After the adjustment plate 9 moves to the right and the telescopic curtain 23 is expanded, the airflow direction changes, and the gas in the original dead zone is instantly taken away. Then the third motor 25 is controlled to drive its output shaft to rotate counterclockwise, and the two transmission components 26 are used to connect the two second screw rods 24 to rotate synchronously counterclockwise, driving each adjustment plate 9 to move leftward and reset along the outside of the array tube 4, and the telescopic curtain 23 is synchronously retracted into the hidden groove. By repeatedly driving the adjustment plate 9 to move left and right and the telescopic curtain 23 to expand and retract, the formation of a dead zone inside the shell 1 is avoided, and scaling and corrosion are reduced.

[0022] Working principle: When in use, the high-temperature gas produced by the methanol hydrogen production reaction is introduced into the shell 1 through the air inlet pipe 10, and the liquid raw material required for methanol hydrogen production is introduced into the right head 2 through the feed pipe 11, and flows to the left through a plurality of tubes 4. The high-temperature gas flows from left to right in a curve along each baffle 5. In this process, the liquid raw material inside each tube 4 exchanges heat with the high-temperature gas to achieve cooling of the high-temperature gas and preheating of the liquid raw material. The high-temperature gas is gradually condensed into liquid and enters the drain pipe 13. After preheating, the liquid raw material flows between the tube plate 3 and the partition 12 on the left through the diverter pipe 20 and is discharged through the discharge pipe 14. During the heat exchange process, according to the flow path of the high-temperature gas, as shown in the attached figure Figure 2The position of the adjustment plate 9 shown is prone to forming a dead zone. By controlling the third motor 25 to drive its output shaft to rotate clockwise, the two second screw rods 24 are synchronously rotated clockwise through the action of the transmission connection of the two transmission components 26, driving each adjustment plate 9 to move to the right along the outside of the array tube 4, and the telescopic curtain 23 is synchronously expanded to prevent the airflow from entering between the adjustment plate 9 and the baffle 5. After the adjustment plate 9 moves to the right and the telescopic curtain 23 is expanded, the airflow direction changes, and the gas in the original dead zone is instantly taken away. Then the third motor 25 is controlled to drive its output shaft to rotate counterclockwise, and the two second screw rods 24 are synchronously rotated counterclockwise through the action of the transmission connection of the two transmission components 26. The first solenoid valve 21 is closed and the second solenoid valve 22 is opened, and the high-pressure pulse air flow generator and the high-pressure pulse air flow tube 8 are connected to the inner portion of the tube 4 in the outer circle. A high-pressure pulse airflow is introduced into the tubes to clean the dirt inside the tubes 4. The cleaned dirt is discharged to the left side of the partition 12 and discharged through the impurity discharge pipe 15. After the cleaning of the interior of the tubes 4 is completed, the first solenoid valve 21 is controlled to open and the second solenoid valve 22 is closed. Then the first motor 17 drives the driving block 6 to rotate, so that the high-pressure pulse tube 8 inside the sealing block 7 is sealed and docked with the end of the next tube 4 in the outermost circle, and then the cleaning is carried out. When the outermost circle of tubes 4 is cleaned in turn, the second motor 19 is controlled to drive the first screw 18 to rotate clockwise, driving the sealing block 7 and the high-pressure pulse tube 8 to move toward the center of the shell 1, so that the high-pressure pulse tube 8 is sealed with the inner circle. The tubes 4 are docked, and high-pressure pulse airflow is introduced into the tubes 4 through the high-pressure pulse airflow generator and the high-pressure pulse tube 8 to clean the dirt inside the tubes 4. Then, the first motor 17 is controlled to drive the driving block 6 to rotate with its output shaft as the center, so that the high-pressure pulse tube 8 inside the sealing block 7 is sealed and docked with the end of the next tube 4 in the same circle, and then the inside of the tube 4 is cleaned. This cycle is repeated from the outer circle to the inner circle, and the inside of each tube 4 is cleaned in turn. By cleaning the inside of the tubes 4 one by one, the effect of cleaning the heat exchanger without stopping is achieved, which solves the problem in the prior art that the head 2 needs to be removed to clean the inside of the tube 4.

[0023] It should be noted that the device structure and drawings of the present invention mainly describe the principles of the present invention. In terms of the technology of this design principle, the settings of the device's power mechanism, power supply system, and control system are not fully described. However, those skilled in the art can clearly understand the details of its power mechanism, power supply system, and control system on the premise that they understand the principles of the above invention. The control method of the application document is automatic control through a controller, and the control circuit of the controller can be implemented by simple programming by those skilled in the art. The above only describes certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be understood as limiting the scope of protection of the claims of the present invention.

Claims

1. A heat exchanger for a methanol-to-hydrogen heat exchange system, comprising a shell (1), heads (2) respectively mounted at both ends of the shell (1), and two tube sheets (3) mounted inside the shell (1), characterized in that: Also includes: A tube bundle assembly is provided with multiple groups, the multiple groups of tube bundle assemblies are concentrically arranged from the inside to the outside, the tube bundle assembly includes multiple tubes (4) distributed along an annular track, and the tubes (4) are installed inside two tube sheets (3); A plurality of baffles (5) are provided, the plurality of baffles (5) being distributed in sequence along the length direction of the shell (1) and arranged in a staggered manner, and the baffles (5) are installed outside the plurality of tube arrays (4); An independent cleaning mechanism, comprising a driving block (6) arranged on an outer wall of one side of one tube sheet (3), a sealing block (7) installed inside the driving block (6), a high-pressure pulse tube (8) installed inside the sealing block (7), and a displacement assembly for driving the sealing block (7) to move, wherein the other end of the high-pressure pulse tube (8) extends to the outside of the head (2) and is connected to a high-pressure pulse airflow generator; The dead zone regulating mechanism comprises an regulating plate (9) arranged inside a side of the baffle plate (5) away from the notch thereof and a regulating component for driving the regulating plate to move.

2. The heat exchanger for a methanol-to-hydrogen heat exchange system according to claim 1, characterized in that: One end of one of the sealing heads (2) is rotatably connected to a driven disk (27), and the high-voltage pulse tube (8) is arranged to pass through the driven disk (27).

3. The heat exchanger for a methanol-to-hydrogen heat exchange system according to claim 2, characterized in that: An air inlet pipe (10) and a feed pipe (11) are installed on the top of the housing (1), and the feed pipe (11) is located between the driven disc (9) and one of the tube sheets (3); The air inlet pipe (10) is located on a side of the other tube plate (3) close to the driven disc (9).

4. The heat exchanger for a methanol-to-hydrogen heat exchange system according to claim 3, characterized in that: A partition (12) is installed inside the other head (2), and the tubes (4) are arranged to pass through the partition (12); A plurality of liquid discharge pipes (13), material discharge pipes (14) and impurity discharge pipes (15) are installed at the bottom of the shell (1). The material discharge pipes (14) are located between the partition (12) and another tube sheet (3), and the impurity discharge pipes (15) are located on a side of the partition (12) away from the material discharge pipes (14).

5. The heat exchanger for a methanol-to-hydrogen heat exchange system according to claim 4, characterized in that: A sliding groove (16) is provided inside the driving block (6) along its length, and the sealing block (7) is slidably connected inside the sliding groove (16); A first motor (17) is mounted on the outer wall of the other end cap (2). The output shaft of the first motor (17) passes through the baffle (5) and the tube sheet (3). One end of the drive block (6) is fixedly sleeved on the outside of the output shaft of the first motor (17).

6. The heat exchanger for a methanol-to-hydrogen heat exchange system according to claim 5, characterized in that: The displacement assembly includes a first screw rod (18) rotatably connected to the inside of the slide groove (16) and a second motor (19) mounted on the outer wall of one end of the driving block (6), and the output end of the second motor (19) is fixedly connected to one end of the first screw rod (18); The sealing block (7) is threadedly connected to the outside of the first screw rod (18).

7. The heat exchanger for a methanol-to-hydrogen heat exchange system according to claim 6, characterized in that: A shunt pipe (20) is installed on the outer wall of the tube array (4), and the shunt pipe (20) is located between the partition plate (12) and another tube plate (3). A first solenoid valve (21) is installed on the shunt pipe (20), and a second solenoid valve (22) is installed on the tube array (4).

8. The heat exchanger for a methanol-to-hydrogen heat exchange system according to claim 7, characterized in that: A hidden groove is provided inside the deflector (5), the adjustment plate (9) is located inside the hidden groove, and a telescopic curtain (23) is installed on the outer wall of the adjustment plate (9) close to the center of the shell (1), and the other end of the telescopic curtain (23) is fixed to the inner wall of the hidden groove.

9. The heat exchanger for a methanol-to-hydrogen heat exchange system according to claim 8, characterized in that: The adjustment assembly includes two second screw rods (24) rotatably connected to the inside of the two tube sheets (3) and a third motor (25) mounted on the outer wall of the other head (2); One end of each of the two second screw rods (24) extends to the outside of the head (2), and the third motor (25) and the two second screw rods (24) are connected to each other via a transmission assembly (26); Among them, a row of adjustment plates (9) near the top of the shell (1) are all threadedly connected to the outside of one of the second screw rods (24), and a row of adjustment plates (9) near the bottom of the shell (1) are all threadedly connected to the outside of another second screw rod (24), and the adjustment plates (9) are also slidably sleeved on the outside of the tube array (4).

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