A methanol synthesis apparatus

Abstract

The application belongs to the technical field of methanol synthesis, and discloses a methanol synthesis device, which comprises a methanol synthesis tower and a plurality of catalyst parts, and two tower covers are fixedly connected to the outer wall of the methanol synthesis tower and communicate with the methanol synthesis tower; a connecting shaft is rotatably connected between the two tower covers, and two positioning sleeves are fixedly connected to the outer circumferential wall of the connecting shaft. In the application, the alignment of the catalyst part station can be completed through one rotation of the connecting shaft, and the loading of a new part and the discharging of an old part can be completed simultaneously through one linear advancement of the plug rod, thereby improving the replacement efficiency; and the replacement operation is completed in a fixedly sealed chamber, the replacement path of the catalyst part is limited in a closed passage formed between the two electric gate valves and the methanol synthesis tower, the leakage risk caused by the long-term wear of the complex movable sealing mechanism under high temperature and high pressure is eliminated, and the safety and reliability of long-term operation of the equipment are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of methanol synthesis, more particularly, to a methanol synthesis device. BACKGROUND

[0002] Methanol synthesis is a typical catalytic reaction process, and its production efficiency is closely related to the activity of the catalyst. In the traditional fixed-bed methanol synthesis tower, the catalyst is usually filled in the form of particles. When the catalyst is deactivated, it must be stopped, depressurized, and cooled down, and then the reactor is opened for replacement. This process not only takes a long time, causing production interruption and huge economic losses, but also poses a safety risk in a high-temperature and high-pressure environment.

[0003] In actual industrial operation, due to factors such as synthesis gas flow distribution, temperature gradient, local poisoning, or sintering, catalyst deactivation is often uneven, and individual catalyst cylinders may deactivate before others.

[0004] To reduce downtime, the document with publication number CN116899521B discloses a methanol synthesis device that uses a rotatable turntable and an angle cylinder to arrange catalyst cylinders and extracts and inserts them through an external mechanical hand. Although this scheme achieves mechanized replacement to some extent, it still has shortcomings. First, the replacement process of the catalyst cylinders in this device is intermittent, with the old ones being taken out and the new ones being inserted, which is low in efficiency. Second, the realization of the mechanical hand entering and exiting the reactor requires a complex movable sealing mechanism, which, when used for a long time in a high-temperature and high-pressure synthesis gas environment, poses a leakage risk. In view of this, we propose a methanol synthesis device. SUMMARY

[0005] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application proposes a methanol synthesis device that can align the catalyst pieces in the workstations through one rotation of the connecting shaft, and simultaneously complete the insertion of a new piece and the removal of an old piece through one linear advancement of the plug rod, thereby improving the replacement efficiency. Moreover, the replacement operations are all completed in a fixedly sealed chamber, and the replacement path of the catalyst pieces is limited to a closed passage formed inside the two electrically operated gate valves and the methanol synthesis tower, thereby eliminating the leakage risk caused by the long-term wear of the complex movable sealing mechanism in a high-temperature and high-pressure environment, and improving the safety and reliability of long-term operation of the equipment.

[0006] The utility model provides a kind of methanol synthesis device, including methanol synthesis tower and multiple catalysts, the outer wall of the methanol synthesis tower is fixedly connected with two tower covers, the tower cover is communicated with methanol synthesis tower, two The connecting shaft is rotatably connected between the tower cover, the outer peripheral wall of the connecting shaft is fixedly connected with two positioning sleeves, the end surface of the positioning sleeve is equipped with multiple positioning holes, the outer peripheral wall of the connecting shaft is fixedly connected with fixed sleeve, the end surface of the fixed sleeve is equipped with multiple fixed holes, the outer wall of the fixed sleeve is equipped with positioning assembly, the one end of multiple catalysts is inserted in fixed hole, the other end is respectively penetrated the positioning hole on two positioning sleeves, the positioning assembly is used to fix catalyst, the outer end surface of two The tower cover is fixedly connected with electric gate valve, the electric gate valve is communicated with methanol synthesis tower, the outer wall of the methanol synthesis tower is equipped with limiting groove, the inner wall of the limiting groove is slidably connected with conveying plate, the inner wall of the conveying plate is fixedly connected with plug rod, external hydraulic cylinder moves by pushing conveying plate, conveying plate drives plug rod to move to discharge pipe, electric gate valve and methanol synthesis tower in sequence.

[0007] Preferably, the catalyst piece includes a catalyst cylinder, the outer peripheral wall of the catalyst cylinder is provided with a plurality of through holes, the outer wall of the catalyst cylinder is provided with a positioning groove, and the two ends of the catalyst cylinder are both provided with a plug.

[0008] Preferably, the positioning assembly includes a plurality of positioning rods, the plurality of positioning rods are respectively slidably connected with the fixed sleeve, the end of the positioning rod extends into the fixed hole, the outer peripheral wall of the positioning rod is sleeved with a first spring, and the end of the positioning rod is respectively clamped and matched with the positioning groove.

[0009] Preferably, one end of the first spring is fixedly connected with the fixed sleeve, and the other end of the first spring is fixedly connected with the positioning rod.

[0010] Preferably, one of the tower covers is fixedly connected with a motor at the outer end, and the output end of the motor is fixedly connected with the connecting shaft.

[0011] Preferably, the end of the electric gate valve close to the fixed sleeve is fixedly connected with a feeding pipe, and the end of the electric gate valve away from the fixed sleeve is fixedly connected with a discharge pipe.

[0012] Preferably, the outer wall of the discharge pipe is fixedly connected with two support plates, the inner wall of the support plate is fixedly connected with a sliding rod, the circumferential outer wall of the sliding rod is sleeved with a second spring, the outer wall of the sliding rod is slidably connected with a sliding block, the two sliding blocks are rotatably connected with a rotating shaft, the two ends of the rotating shaft respectively penetrate the sliding block and extend to the outer side thereof, the circumferential outer wall of the rotating shaft is fixedly connected with a conveying gear, the conveying gear is located between the two support plates, the tooth end of the conveying gear is fixedly connected with a rubber block, one end of the second spring is fixedly connected with the sliding block, and the other end of the second spring is fixedly connected with the support plate.

[0013] Preferably, the end of the conveying plate is fixedly connected with two fork arms, the end of each of the fork arms is bent to form a bent end towards one side of the discharge pipe, the two support plates are located between the two fork arms, the outer wall of each of the fork arms is provided with a through hole, the distance between the two through holes is greater than the length of the rotating shaft, the inner wall of each of the through holes is rotationally connected with a fixed shaft, the outer circumferential wall of the fixed shaft is fixedly connected with a baffle, the end of the baffle is bent to form a bent plate, the bending direction of the bent plate is opposite to the bent end, the top of the bent plate is provided with a bent hole, the inner wall of the bent hole is provided with a fracture joint, and the bent plate is formed to have elasticity through the bent hole and the fracture joint.

[0014] Preferably, the inner wall of the discharge pipe is embedded with a plurality of rotating rolling balls, and the outer wall of the discharge pipe is provided with a connecting hole.

[0015] Preferably, the methanol synthesis device further comprises a driving tooth plate, the four corners of the driving tooth plate are slidingly connected with guide rods, the ends of the guide rods are fixedly connected with the fork arms, respectively, the outer walls of the guide rods are sleeved with third springs, and the driving tooth plate is engaged with the conveying gear.

[0016] Compared with the prior art, the application has the following beneficial effects:

[0017] Through one rotation of the connecting shaft, the alignment of the catalyst part station can be completed, and through one linear advancement of the plug rod, the loading of a new part and the discharging of an old part can be completed synchronously. This process does not require the mechanical hand to repeatedly enter and exit, and the action is simple and coherent, so that the replacement time of a single device is shortened to one linear stroke, and the replacement efficiency is improved. Moreover, the replacement operation is completed in the fixed sealed chamber, and the replacement path of the catalyst part is limited in the closed channel formed inside the two electrically operated gate valves and the methanol synthesis tower. The electrically operated gate valves are always in a closed state before and after replacement, and are only opened at the instant of feeding and discharging. The electrically operated gate valves are mature static sealing elements, and the sealing reliability is much higher than that of dynamic movable seals. This design eliminates the leakage risk caused by the long-term wear of the complex movable sealing mechanism under high temperature and high pressure, and improves the safety and reliability of long-term operation of the equipment. The application supports selective replacement based on catalyst activity monitoring, avoids waste caused by overall replacement by identifying and replacing individual deactivated catalyst cylinders, prolongs the service life of the catalyst system, and reduces operating costs. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be considered as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained from the drawings without any creative effort.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0020] Figure 2 It is a schematic diagram of the structure of the methanol synthesis tower of the present application;

[0021] Figure 3 It is a schematic diagram of the internal structure of the present application;

[0022] Figure 4 It is a schematic diagram of the installation structure of the methanol synthesis tower of the present application;

[0023] Figure 5 It is a schematic diagram of the installation structure of the positioning sleeve and the fixing sleeve of the present application;

[0024] Figure 6 It is a schematic diagram of the structure of the catalyst cylinder of the present application;

[0025] Figure 7 It is a schematic diagram of the installation structure of the fork arm of the present application;

[0026] Figure 8 It is an enlarged view of A in the present application Figure 7

[0027] Figure 9 It is an enlarged view of B in the present application Figure 7

[0028] Figure 10 It is a schematic diagram of the installation structure of the conveying gear of the present application;

[0029] Figure 11 It is a schematic diagram of the installation structure of the baffle of the present application.

[0030] ​​Explanation of the numbers in the diagram: 1. Methanol synthesis tower; 2. Tower cover; 3. Limiting groove; 4. Electric gate valve; 5. Feed pipe; 6. Discharge pipe; 601. Connecting hole; 602. Ball bearing; 7. Connecting shaft; 8. Positioning sleeve; 801. Positioning hole; 9. Fixing sleeve; 10. Fixing hole; 11. Positioning rod; 12. First spring; 13. Motor; 14. Catalyst cylinder; 15. Through hole; 16. Positioning groove; 17. Plug; 18. 1801. Conveyor plate; 19. Fork arm; 20. Plug rod; 21. Bending end; 22. Support plate; 23. Slide rod; 24. Second spring; 25. Slider; 26. Rotating shaft; 27. Conveyor gear; 28. Rubber block; 29. ​​Drive gear plate; 30. Guide rod; 31. Third spring; 32. Through hole; 33. Fixed shaft; 34. Torsion spring; 35. Bending plate; 36. Bending hole; 37. Crack. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0032] like Figures 1-5 As shown, a methanol synthesis apparatus includes a methanol synthesis tower 1 and multiple catalyst elements. Two tower covers 2 are fixedly connected to the outer wall of the methanol synthesis tower 1, and the tower covers 2 communicate with the methanol synthesis tower 1. A connecting shaft 7 is rotatably connected between the two tower covers 2. Two positioning sleeves 8 are fixedly connected to the outer peripheral wall of the connecting shaft 7, and each positioning sleeve 8 has multiple positioning holes 801 on its end face. A fixing sleeve 9 is fixedly connected to the outer peripheral wall of the connecting shaft 7, and the fixing sleeve 9 has multiple fixing holes 10 on its end face. A positioning assembly is installed on the outer wall of the fixing sleeve 9. One end of each catalyst element is inserted into a fixing hole 10. Inside the 0, the other end passes through the positioning holes 801 on the two positioning sleeves 8 respectively. The positioning components are used to fix the catalyst components. Electric gate valves 4 are fixedly connected to the outer end faces of the two tower covers 2. Electric gate valves 4 are connected to methanol synthesis tower 1. Limit grooves 3 are opened on the outer wall of methanol synthesis tower 1. A conveying plate 18 is slidably connected to the inner wall of the limit groove 3. A stopper rod 19 is fixedly connected to the inner wall of the conveying plate 18. The external hydraulic cylinder pushes the conveying plate 18 to move. The conveying plate 18 drives the stopper rod 19 to move sequentially into the discharge pipe 6, the electric gate valve 4 and the methanol synthesis tower 1.

[0033] One of the tower covers 2 has a motor 13 fixedly connected to its outer end, and the output end of the motor 13 is fixedly connected to the connecting shaft 7.

[0034] The fixed sleeve 9 and the positioning sleeve 8 are driven to rotate by the connecting shaft 7 to realize alignment, and then the linear motion of the plug rod 19 is used to complete the pushing and replacement, so that the prior art intermittent operation of taking first and putting later is innovated into continuous operation of entering and exiting at the same time, and the replacement efficiency is improved.

[0035] The electric gate valve 4 replaces the complex movable sealing mechanism, controls the sealing of the tower through opening and closing of the valve, solves the leakage risk under high temperature and high pressure, and simplifies the structure and maintenance difficulty of the device.

[0036] The cooperation of the plug rod 19 and the conveying plate 18 provides mechanical pushing force for the replacement of the catalyst cylinder 14, avoids positioning deviation caused by manual operation, and meets the replacement requirements of heavy catalyst cylinders 14; the limiting groove 3 provides guidance for the conveying plate 18, ensures the accuracy of the moving track of the plug rod 19, and avoids interference with the internal components of the tower.

[0037] As shown in Figure 5 and Figure 6 , the catalyst part includes a catalyst cylinder 14, a plurality of through holes 15 are formed in the outer peripheral wall of the catalyst cylinder 14, a positioning groove 16 is formed in the outer wall of the catalyst cylinder 14, and a plug 17 is installed at both ends of the catalyst cylinder 14.

[0038] The through holes 15 of the catalyst cylinder 14 are designed to increase the contact area between the synthesis gas and the catalyst, thereby improving the reaction efficiency; the plug 17 can protect the catalyst before the catalyst cylinder 14 is installed, avoid moisture and pollution during transportation or installation, and facilitate overall assembly and disassembly; the positioning groove 16 provides a clamping point for the subsequent positioning assembly, ensures the stable fixation of the catalyst cylinder 14, and avoids the influence of vibration on the contact area during the reaction.

[0039] The positioning assembly includes a plurality of positioning rods 11, the plurality of positioning rods 11 are respectively connected with the fixed sleeve 9 in a sliding manner, the end of the positioning rod 11 extends into the fixed hole 10, the outer peripheral wall of the positioning rod 11 is sleeved with a first spring 12, the end of the positioning rod 11 is clamped and matched with the positioning groove 16, one end of the first spring 12 is fixedly connected with the fixed sleeve 9, and the other end of the first spring 12 is fixedly connected with the positioning rod 11.

[0040] One end of the first spring 12 is fixed to the fixed sleeve 9, and the other end is fixed to the positioning rod 11, so that the positioning rod 11 is automatically reset after the catalyst cylinder 14 is taken out, manual adjustment is not required, and convenience is provided for installation of the new catalyst cylinder 14.

[0041] As shown in Figure 4 , the end of the electric gate valve 4 near the fixed sleeve 9 is fixedly connected with a feeding pipe 5, and the end of the electric gate valve 4 away from the fixed sleeve 9 is fixedly connected with a discharging pipe 6.

[0042] As shown in Figures 7-11As shown, the outer wall of the discharge pipe 6 is fixedly connected with two support plates 21, the inner wall of the support plate 21 is fixedly connected with a sliding rod 22, the circumferential outer wall of the sliding rod 22 is sleeved with a second spring 23, the outer wall of the sliding rod 22 is slidably connected with a sliding block 24, the two sliding blocks 24 are rotatably connected with a rotating shaft 25, the two ends of the rotating shaft 25 respectively penetrate through the sliding block 24 and extend to the outside thereof, the circumferential outer wall of the rotating shaft 25 is fixedly connected with a conveying gear 26, the conveying gear 26 is located between the two support plates 21, the tooth end of the conveying gear 26 is fixedly connected with a rubber block 27, one end of the second spring 23 is fixedly connected with the sliding block 24, and the other end of the second spring 23 is fixedly connected with the support plate 21.

[0043] The end of the conveying plate 18 is fixedly connected with two fork arms 1801, the end of the fork arm 1801 is bent towards one side of the discharge pipe 6 to form a bent end 20, the two support plates 21 are located between the two fork arms 1801, the outer wall of the fork arm 1801 is provided with a through hole 31, the distance between the two through holes 31 is greater than the length of the rotating shaft 25, the inner wall of the through hole 31 is rotatably connected with a fixed shaft 32, the end of the fixed shaft 32 is sleeved with a torsional spring 33, one end of the torsional spring 33 is fixedly connected with the fork arm 1801, the other end of the torsional spring 33 is fixedly connected with a baffle plate 34, the outer circumferential wall of the fixed shaft 32 is fixedly connected with the baffle plate 34, the end of the baffle plate 34 is bent to form a bent plate 35, the bending direction of the bent plate 35 is opposite to that of the bent end 20, the top of the bent plate 35 is provided with a bent hole 36, the inner wall of the bent hole 36 is provided with a fracture joint 37, and the bent plate 35 forms a flexible bend through the bent hole 36 and the fracture joint 37.

[0044] The inner wall of the discharge pipe 6 is embedded with a plurality of rotating rolling balls 602, and the outer wall of the discharge pipe 6 is provided with a connecting hole 601.

[0045] The methanol synthesis device further comprises a driving tooth plate 28, the four corners of the driving tooth plate 28 are slidably connected with guide rods 29, the distance between the two guide rods 29 at the same end of the driving tooth plate 28 is greater than the length of the rotating shaft 25, so that the rotating shaft 25 can pass between the two guide rods 29, the ends of the guide rods 29 are respectively fixedly connected with the fork arms 1801, the outer walls of the guide rods 29 are sleeved with third springs 30, and the driving tooth plate 28 is engaged with the conveying gear 26.

[0046] The conveying gear 26 cooperates with the rubber block 27 to provide auxiliary power for pushing the catalyst cylinder 14, reduces the pushing resistance of the plug rod 19, and avoids damage of the catalyst cylinder 14 caused by friction jamming; the second spring 23 provides elastic support for the rotating shaft 25 through the sliding block 24, so that the rubber block 27 is always in contact with the catalyst cylinder 14.

[0047] The bent end 20 of the fork arm 1801 and the bent plate 35 of the baffle plate 34 form double guiding.

[0048] In the present invention, not only is assistance provided when a new catalyst piece is loaded, but also during the reset stage of the plug rod 19, a driving force is actively provided to discharge the old catalyst piece, and the discharge of the old piece is not dependent on gravity or the residual thrust of the new piece, but rather has an independent and reliable driving force guarantee, ensuring smooth replacement of the flow.

[0049] When the old piece is stuck and the resistance is too large, the transmission gear 26 is blocked and stops rotating, causing the drive gear plate 28 to be unable to move. At this time, the fork arm 1801 that continues to reset will absorb energy through the compression of the third spring 30 and the elastic bending or breaking of the baffle 34, avoiding the possibility of motor overload or mechanism damage caused by hard connection.

[0050] In actual industrial operation, due to factors such as synthesis gas flow distribution, temperature gradient, local poisoning or sintering, catalyst deactivation is often uneven, and individual catalyst cylinders 14 may be deactivated first. However, the existing technology cannot achieve selective replacement of deactivated catalyst cylinders 14, and only the entire replacement can be carried out, which leads to low catalyst utilization and high replacement cost. The present invention supports selective replacement based on catalyst activity monitoring, and by identifying individual deactivated catalyst cylinders 14 and carrying out targeted replacement, it avoids the waste of overall replacement, prolongs the service life of the catalyst system, and reduces operating costs.

[0051] In actual industrial application, the device can integrate a catalyst activity monitoring system, such as an online gas analyzer or a temperature sensor, for real-time monitoring of the activity status of each catalyst cylinder 14. When the monitoring system detects that a catalyst cylinder 14 is deactivated, for example, through changes in the composition of the reactor outlet gas or local temperature abnormalities, it triggers the replacement program, starts the motor 13, drives the connecting shaft 7 to rotate, aligns the position of the deactivated catalyst cylinder 14 with the electrically operated gate valve 4, and then opens the electrically operated gate valve 4, which pushes the delivery plate 18 and the plug rod 19 through the hydraulic cylinder, synchronously completing the loading of the new catalyst cylinder 14 and the discharge of the old catalyst cylinder 14. After replacement, the electrically operated gate valve 4 is closed to restore the seal. This selective replacement based on monitoring allows maintenance of catalyst efficiency without stopping the machine, prolongs the overall catalyst life, and reduces replacement costs.

[0052] The raw material synthesis gas from the previous stage enters the top of the methanol synthesis tower 1, and the synthesis gas first fills the annular space inside the tower formed by the tower body, the positioning sleeve 8 and the multiple catalyst cylinders 14. This space is the first distribution area of the entire reaction system, ensuring that the gas can uniformly contact the outer wall of each catalyst cylinder. Under the action of the pressure difference, the synthesis gas passes through the large number of through holes 15 on the cylinder wall, horizontally and radially through the cylinder wall, and enters the inside of the catalyst cylinder 14. The inside of the catalyst cylinder 14 is filled with granular or other shaped catalyst. When the synthesis gas passes through the catalyst bed in the cylinder, a catalytic reaction occurs under certain temperature and pressure conditions, mainly generating methanol and water.

[0053] Working principle: when the catalyst needs to be replaced, the plug rod 19 is removed from the feeding pipe 5, a new catalyst cylinder 14 is put into the feeding pipe 5, and the two electric gate valves 4 are opened.

[0054] The starting motor 13 drives the connecting shaft 7 to rotate, which drives the fixed sleeve 9 and the two positioning sleeves 8 to rotate together, aligning one end of the deactivated catalyst cylinder 14 in the tower with the inlet of the electric gate valve 4, and the other end with the outlet of the other electric gate valve 4.

[0055] The external hydraulic cylinder pushes the conveying plate 18 to slide along the limiting groove 3, and the conveying plate 18 drives the plug rod 19 to move into the feeding pipe 5, extruding the new catalyst cylinder 14 into the tower, and the end of the new catalyst cylinder 14 extrudes the old catalyst cylinder 14 on the fixed sleeve 9 and the positioning sleeve 8, at this time the positioning rod 11 is detached from the positioning groove 16 on the old catalyst cylinder 14, and the positioning groove 16 is replaced into the fixed sleeve 9 and the positioning sleeve 8, under the elastic force of the first spring 12, the positioning rod 11 is automatically clamped into the positioning groove 16, locking the new catalyst cylinder 14, and the end of the old catalyst cylinder 14 extends into the discharge pipe 6 and rolls in contact with the ball 602.

[0056] Before the old catalyst cylinder 14 enters the discharge pipe 6, the conveying plate 18 drives the two fork arms 1801 to move, the fork arms 1801 extrude the two ends of the rotating shaft 25 through the bent ends 20 at the ends, the rotating shaft 25 drives the sliding block 24 to slide along the slide rod 22, so that the second spring 23 is stretched, and the rotating shaft 25 drives the conveying gear 26 to move out of the connecting hole 601.

[0057] The fork arms 1801 continue to move, the rotating shaft 25 passes between the two guide rods 29 and slides along the fork arms 1801, and when the conveying gear 26 moves out of the discharge pipe 6, it extrudes the driving tooth plate 28 to move, the driving tooth plate 28 slides along the guide rod 29, stretches the third spring 30, and always maintains the state of engaging with the conveying gear 26, and the fork arms 1801 drive the driving tooth plate 28 to move, which can drive the conveying gear 26 to rotate.

[0058] The rotating shaft 25 slides along the baffle 34, extruding the elastic bent plate 35, the bent plate 35 elastically bends along the bent hole 36, until the rotating shaft 25 moves to one side of the end of the bent plate 35, at this time, the old catalyst cylinder 14 enters the discharge pipe 6.

[0059] The outer hydraulic cylinder drives the conveying plate 18 to move reversely, the both ends of the rotating shaft 25 extrude the bent plate 35, at this time, the fracture joints 37 of the bent holes 36 contact with each other and limit the bent plate 35, under the extrusion of the rotating shaft 25, the baffle 34 drives the fixed shaft 32 to rotate, the rotating shaft 25 passes through the perforated hole 31, under the pulling force of the second spring 23, part of the gear teeth of the conveying gear 26 enters the connecting hole 601, the rubber block 27 extrudes the outer wall of the old catalyst cylinder 14, under the pulling force of the third spring 30, the driving tooth plate 28 keeps meshing with the conveying gear 26, at this time, the fork arm 1801 drives the driving tooth plate 28 to move reversely, and then drives the conveying gear 26 to rotate reversely, and then pushes the old catalyst cylinder 14 in the discharging pipe 6 to move out, and the replacement operation is completed.

[0060] After the replacement, the two electric gate valves 4 are closed, the inside of the methanol synthesis tower 1 is isolated from the outside environment, and the stability of the reaction condition in the tower is ensured.

[0061] The above shows and describes the basic principle, main features and advantages of the present application. It should be understood by those skilled in the art that the present application is not limited by the above-mentioned embodiments, the above-mentioned embodiments and the description in the specification are only preferred examples of the present application, and are not used to limit the present application, various changes and improvements of the present application can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A methanol synthesis plant comprising a methanol synthesis column (1) and a plurality of catalyst pieces, characterized in that: The outer wall of the methanol synthesis tower (1) is fixedly connected with two tower covers (2), the tower cover (2) is communicated with the methanol synthesis tower (1), the connecting shaft (7) is rotatably connected between the two tower covers (2), the connecting shaft (7) is fixedly connected with two positioning sleeves (8) on the outer circumferential wall, a plurality of positioning holes (801) are formed in the end face of the positioning sleeve (8), the connecting shaft (7) is fixedly connected with a fixed sleeve (9) on the outer circumferential wall, a plurality of fixed holes (10) are formed in the end face of the fixed sleeve (9), the fixed sleeve (9) is installed with a positioning assembly, a plurality of catalyst parts are inserted into the fixed holes (10) at one end, and the other end respectively penetrates the positioning holes (801) on the two positioning sleeves (8), the positioning assembly is used for fixing the catalyst parts, the outer end face of the two tower covers (2) is fixedly connected with an electric gate valve (4), the electric gate valve (4) is communicated with the methanol synthesis tower (1), the outer wall of the methanol synthesis tower (1) is provided with a limiting groove (3), the inner wall of the limiting groove (3) is slidably connected with a conveying plate (18), the inner wall of the conveying plate (18) is fixedly connected with a plug rod (19), an external hydraulic cylinder moves by pushing the conveying plate (18), and the conveying plate (18) drives the plug rod (19) to move into the discharge pipe (6), the electric gate valve (4) and the methanol synthesis tower (1) in sequence; The end of the electric gate valve (4) close to the fixed sleeve (9) is fixedly connected with a feeding pipe (5), and the end of the electric gate valve (4) away from the fixed sleeve (9) is fixedly connected with a discharge pipe (6); The outer wall of the discharge pipe (6) is fixedly connected with two supporting plates (21), the inner wall of the supporting plate (21) is fixedly connected with a sliding rod (22), the circumferential outer wall of the sliding rod (22) is sleeved with a second spring (23), the outer wall of the sliding rod (22) is slidably connected with a sliding block (24), the rotating shaft (25) is rotatably connected between the two sliding blocks (24), the rotating shaft (25) extends to the outer side of the sliding block (24) and penetrates the sliding block (24) at both ends, the circumferential outer wall of the rotating shaft (25) is fixedly connected with a conveying gear (26), the conveying gear (26) is located between the two supporting plates (21), the tooth end of the conveying gear (26) is fixedly connected with a rubber block (27), one end of the second spring (23) is fixedly connected with the sliding block (24), and the other end of the second spring (23) is fixedly connected with the supporting plate (21). The both ends of the conveying plate (18) are fixedly connected with two fork arms (1801), the both ends of the fork arms (1801) are respectively bent to form bent ends (20) towards one side of the discharge pipe (6), the two support plates (21) are located between the two fork arms (1801), the outer walls of the fork arms (1801) are respectively provided with perforations (31), the distance between the two perforations (31) is greater than the length of the rotating shaft (25), the inner walls of the perforations (31) are respectively rotatably connected with fixed shafts (32), the ends of the fixed shafts (32) are sleeved with torsional springs (33), one end of the torsional spring (33) is fixedly connected with the fork arm (1801), the other end of the torsional spring (33) is fixedly connected with the baffle (34), the outer circumferential walls of the fixed shafts (32) are fixedly connected with the baffles (34), the ends of the baffles (34) are bent to form bent plates (35), the bending direction of the bent plates (35) is opposite to that of the bent ends (20), the top of the bent plate (35) is provided with a bent hole (36), the inner wall of the bent hole (36) is provided with a fracture joint (37), the bent plate (35) is formed to have elasticity through the bent hole (36) and the fracture joint (37).

2. The methanol synthesis apparatus of claim 1, wherein: The catalyst piece comprises a catalyst cylinder (14), the outer circumferential wall of the catalyst cylinder (14) is provided with a plurality of through holes (15), the outer wall of the catalyst cylinder (14) is provided with a positioning groove (16), and the both ends of the catalyst cylinder (14) are respectively provided with a plug (17).

3. The methanol synthesis apparatus of claim 2, wherein: The positioning assembly comprises a plurality of positioning rods (11), the positioning rods (11) are respectively slidably connected with the fixed sleeve (9), the ends of the positioning rods (11) extend into the fixed hole (10), the outer circumferential walls of the positioning rods (11) are respectively sleeved with first springs (12), and the ends of the positioning rods (11) are respectively clamped and matched with the positioning groove (16).

4. The methanol synthesis apparatus of claim 3, wherein: One end of the first spring (12) is fixedly connected with the fixed sleeve (9), and the other end of the first spring (12) is fixedly connected with the positioning rod (11).

5. The methanol synthesis apparatus of claim 4, wherein: One end of the first spring (12) is fixedly connected with the fixed sleeve (9), and the other end of the first spring (12) is fixedly connected with the positioning rod (11).

6. The methanol synthesis apparatus of claim 5, wherein: One end of the first spring (12) is fixedly connected with the fixed sleeve (9), and the other end of the first spring (12) is fixedly connected with the positioning rod (11).

7. The methanol synthesis apparatus of claim 6, wherein: The outer wall of the discharge pipe (6) is provided with a connecting hole (601). The driving toothed plate (28) is slidably connected with guide rods (29) at four corners, the ends of the guide rods (29) are respectively fixedly connected with the fork arms (1801), the outer walls of the guide rods (29) are respectively sleeved with third springs (30), and the driving toothed plate (28) is engaged with the conveying gear (26).

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