A catalyst filtering system and filtering method in a TMHDA synthesis process

Abstract

The application discloses a catalyst filtering system in a TMHDA synthesis process, which comprises an outer roller, an inner fixed cylinder, a filter plate and a receiving tank, the inner fixed cylinder is installed above the receiving tank, the outer roller is coaxially sleeved outside the inner fixed cylinder, the filter plate is installed on the outer circumferential wall of the outer roller, the upper part and the lower part of the outer circumferential wall of the inner fixed cylinder are respectively provided with a receiving port and a feeding port, the filter plate can be communicated with the receiving port or the feeding port when the outer roller is rotated to the filter plate vertically upward or downward, the filter plate comprises a side clamping plate, a filter membrane, an elastic pressing beam and a potential energy releasing assembly, the elastic pressing beam is installed outside the filter membrane, the elastic pressing beam comprises a fixing frame, a rotating rod, a horizontal pushing rod and a first spring, a plurality of first magnetic columns are arranged radially on the rotating rod, the horizontal pushing rod is connected with the fixing frame through the first spring, the horizontal pushing rod is provided with a second magnetic column, the end of the rotating rod inserted into the side clamping plate is provided with a driven gear, and the potential energy releasing assembly comprises a fixed plate, a counterweight and a second spring, the counterweight is connected with the fixed plate through the second spring.

Description

Technical Field

[0001] This invention relates to the field of catalyst filtration technology, and in particular to a catalyst filtration system and filtration method for the TMDHA synthesis process. Background Technology

[0002] Tetramethylethylenediamine (TMEDA) is a special tertiary amine product. It is a colorless, transparent liquid with a slight ammonia odor and is an important organic intermediate. It is miscible with water, ethanol, ether, and other organic solvents. TMEDA is mainly used as a biochemical reagent, an epoxy resin crosslinking agent, an intermediate in the preparation of quaternary compounds, a raw material for synthetic water treatment agents, pesticides, pharmaceuticals, fragrances, and dyes. It can also be used as a solvent in the spinning of synthetic fibers, plastics processing, and the production of lignocellulosic inks. Furthermore, it is used as a paper treatment agent, a coagulant accelerator in oil drilling and construction, a carburizing and nitriding agent in the foundry industry, a softener for animal glue, and a polar solvent in organic synthesis.

[0003] In existing technologies, the production process of tetramethylethylenediamine uses ethylenediamine as a raw material, which reacts with paraformaldehyde in methanol solvent to produce tetramethylethylenediamine. The production process includes steps such as batching, reaction, and distillation.

[0004] After the hydrogenation reaction is complete, the reaction liquid needs to be transferred to the catalyst settling tank to filter and recover the catalyst. After the reaction liquid has settled, the catalyst at the bottom of the settling tank is returned to the hydrogenation tank for reuse. The existing tetramethylethylenediamine production process mostly uses Raney nickel as the catalyst. Raney nickel catalyst settles slowly in the settling tank, and the catalyst recovery efficiency is low. Summary of the Invention

[0005] To address the problems mentioned in the background section, this invention provides a catalyst filtration system and filtration method for the TMDHA synthesis process.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A catalyst filtration system for a TMHDA synthesis process includes an outer drum, an inner fixed drum, a filter plate, and a receiving pool. The inner fixed drum is installed above the receiving pool and can move up and down. The outer drum is coaxially sleeved outside the inner fixed drum and can rotate axially. The filter plate is installed on the outer peripheral wall of the outer drum. The upper and lower outer peripheral walls of the inner fixed drum are respectively provided with a receiving port and a conveying port. When the outer drum rotates to the point where the filter plate is vertically facing up or down, the filter plate can communicate with the receiving port or the conveying port.

[0008] The filter plate includes a side clamping plate, a filter membrane, a spring-loaded beam, and a potential energy release assembly. The spring-loaded beam is installed outside the filter membrane. The spring-loaded beam includes a fixed frame, a rotating rod, a horizontal push rod, and a first spring. The rotating rod is radially arranged with multiple first magnetic pillars. The horizontal push rod is connected to the fixed frame through the first spring. The horizontal push rod is equipped with a second magnetic pillar. The end of the rotating rod that is inserted into the side clamping plate is provided with a driven gear.

[0009] The potential energy release component includes a fixed plate, a counterweight, and a second spring. The counterweight is connected to the fixed plate via the second spring.

[0010] Preferably, the inner cylinder is equipped with a material receiving and conveying component and a material conveying pipe, with the material receiving and conveying component installed above the material conveying pipe.

[0011] Preferably, multiple membrane support beams are cross-braced between the side clamps, and the four sides of the filter membrane are integrally connected to the side clamps and the membrane support beams to form a filter cavity inside the filter plate. The filter membrane only allows liquid to pass through and has extensibility.

[0012] Preferably, the receiving tank has a water level holding chamber and a flow chamber, with the upper part of the water level holding chamber connected to the flow chamber.

[0013] Preferably, the rotating rod is restricted to rotating only 90 degrees, and the driven gear can mesh with the counterweight.

[0014] Preferably, a positioning strip is installed on the secondary side of the counterweight facing the fixing plate, the fixing plate has a positioning groove that allows the positioning strip to be inserted, a locking block is installed on the side wall of the positioning groove, and a locking socket that allows the locking block to be inserted is installed on the side wall of the positioning strip.

[0015] Preferably, the locking block has a first groove on the side away from the positioning groove, and a second groove on the side of the first groove facing the counterweight. The first groove and the second groove are connected. A third magnetic column that can move vertically is provided in the first groove. The magnetic poles of the third magnetic column are axially distributed. A third spring is installed on the side of the third magnetic column away from the counterweight.

[0016] Preferably, the locking block is magnetic, with one end of the locking block having a magnetic pole facing the first trough, and the second trough containing a counterweight fluid that can flow between the first and second troughs.

[0017] A catalyst filtration method in a TMHDA synthesis process includes the following steps:

[0018] S1: Adjust the outer roller to keep the filter plate in a vertically downward position;

[0019] S2: Adjust the vertical position of the inner cylinder so that the filter plate extends into the water level maintenance chamber;

[0020] S3: Inject the reaction liquid mixed with the catalyst into the central cylinder. After all the liquid phase of the reaction liquid has flowed into the receiving tank, extract the liquid phase in the receiving tank.

[0021] S4: Adjust the outer roller to keep the filter plate vertically upward, and start the receiving and conveying device to receive and convey the material to the outside of the central cylinder, and return it to the hydrogenation kettle for continued use.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. This invention uses multiple filter plates to perform membrane filtration of the reaction solution containing the catalyst, which is faster and has a higher catalyst recovery efficiency than existing precipitation filtration.

[0024] 2. During unloading, the horizontal push rod of the filter plate of the present invention can repeatedly push the extensible filter membrane, causing the filter membrane to deform and vibrate continuously during recovery. The catalyst particles adhering to the surface of the filter membrane can be quickly shaken off, further optimizing the catalyst recovery effect and improving the catalyst recovery efficiency.

[0025] 3. This invention utilizes a potential energy release component to store the potential energy of the filter plate during its up-and-down flipping, and releases it during catalyst unloading to drive the horizontal push rod to push the filter membrane. The structure is simple and does not require additional energy to drive the horizontal push rod, thus reducing the installation and usage costs of the horizontal push rod.

[0026] 4. In this invention, the locking block is unlocked only after the counterweight has been flipped. The potential energy of the filter plate will not be released prematurely and lost during the flipping process. All potential energy can be released when the catalyst needs to be shaken off, so that the impact time of the horizontal push rod is longer and the catalyst on the surface of the filter membrane can be shaken off and discharged more quickly and effectively. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the main structure of the catalyst filtration system in the TMDHA synthesis process described in this invention.

[0029] Figure 2 This is a side sectional view of the inner cylinder described in this invention;

[0030] Figure 3 This is a schematic diagram of the filter plate 3 described in this invention;

[0031] Figure 4 This is a cross-sectional view of the internal structure of the elastic beam described in this invention;

[0032] Figure 5 This is a cross-sectional view of the internal structure of the side clamping plate described in this invention;

[0033] Figure 6 for Figure 5 Enlarged diagram of point A in the middle.

[0034] In the diagram: 1. Outer roller; 2. Inner fixed roller; 201. Material inlet; 202. Material conveying inlet; 203. Discharge chute; 21. Central cylinder; 22. Material receiving and conveying component; 23. Material conveying pipe; 24. Dividing plate; 3. Filter plate; 301. Positioning groove; 302. Locking socket; 303. First trough; 304. Second trough; 31. Side clamping plate; 32. Filter membrane; 33. Spring-loaded beam; 331. Fixing frame; 332. Rotation. 333, Push rod; 334, First spring; 335, First magnetic column; 336, Second magnetic column; 337, Driven gear; 34, Potential energy release assembly; 341, Fixing plate; 342, Counterweight; 343, Second spring; 344, Positioning strip; 345, Locking block; 346, Third magnetic column; 347, Third spring; 35, Membrane support beam; 4, Receiving pool; 401, Water level holding chamber; 402, Flow chamber. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Reference Figure 1-6 A catalyst filtration system in a TMHDA synthesis process includes an outer roller 1, an inner fixed cylinder 2, a filter plate 3, and a receiving pool 4. The inner fixed cylinder 2 is installed above the receiving pool 4 and can move up and down. The outer roller 1 is coaxially sleeved outside the inner fixed cylinder 2 and can rotate axially. The filter plate 3 is axially arranged and installed on the outer peripheral wall of the outer roller 1.

[0037] The inner cavity of the outer roller 1 is connected to the inner cavity of each filter plate 3. A rotary motor is installed at the end of the inner fixed cylinder 2. The rotating shaft of the rotary motor is connected to the outer roller 1 to drive the outer roller 1 to rotate axially outside the inner fixed cylinder 2.

[0038] The inner cylinder 2 includes a central cylinder 21, a receiving and conveying component 22, and a conveying pipe 23. The upper and lower outer peripheral walls of the central cylinder 21 are respectively provided with a receiving port 201 and a conveying port 202. The receiving and conveying component 22 is horizontally arranged below the receiving port 201 to receive the catalyst filtered by the filter plate 3 falling from the receiving port 201. The catalyst falling on the receiving and conveying component 22 will be conveyed to the outside of the central cylinder 21 and returned to the hydrogenation reactor for continued use.

[0039] The feed pipe 23 is installed below the receiving and conveying device 22. The feed pipe 23 is connected to the hydrogenation device. The reaction liquid mixed with catalyst powder will be transported to the feed pipe 23 after hydrogenation is completed.

[0040] The feed pipe 23 extends horizontally inside the central cylinder 21. A discharge trough 203 is provided on the lower part of the outer peripheral wall of the feed pipe 23. The discharge trough 203 is divided into multiple chambers by several axially arranged dividing plates 24. The reaction liquid entering the feed pipe 23 will be discharged downwards into the central cylinder 21 through each chamber.

[0041] The filter plates 3 are axially arranged on the outer peripheral wall of the outer roller 1. When the outer roller 1 rotates to the state where the filter plates 3 are vertically downward, the inner cavity of each filter plate 3 corresponds to each chamber of the discharge trough 203, so that the reaction liquid can smoothly enter the inner cavity of each filter plate 3 after being discharged downward from the central cylinder 21.

[0042] The filter plate 3 includes side clamps 31, a filter membrane 32, a spring beam 33, and a potential energy release component 34. Multiple membrane support beams 35 are horizontally strung between the side clamps 31. The four sides of the filter membrane 32 are integrally connected to the side clamps 31 and the membrane support beams 35 to form a filter cavity in the filter plate 3. After the reaction liquid mixed with the catalyst flows into the filter cavity, the liquid passes through the filter membrane 32 and flows out, while the catalyst is blocked by the filter membrane 32 and remains in the filter cavity.

[0043] The reaction liquid flowing out of the filter chamber is received by the receiving tank 4, which has a water level holding chamber 401 and a flow chamber 402. The reaction liquid flowing out of the filter plate 3 is first received by the water level holding chamber 401. The upper part of the water level holding chamber 401 is connected to the flow chamber 402. The reaction liquid flowing out of the filter plate 3 will first fill the water level holding chamber 401. At this time, the water level in the water level holding chamber 401 is above the filter membrane 32 at the highest point of the filter plate 3 that extends into the water level holding chamber 401. After the water level holding chamber 401 is filled, the reaction liquid will flow into the flow chamber 402 and continue to be collected.

[0044] Preferably, a stirring device is installed in the water level holding chamber 401 to agitate the reaction liquid in the water level holding chamber 401 to keep it flowing. The agitated reaction liquid in the water level holding chamber 401 can continuously impact the filter membrane 32, thereby removing the catalyst particles that block the filter pores of the filter membrane 32, so that the reaction liquid in the filter chamber can quickly flow into the water level holding chamber 401, thus accelerating the filtration efficiency of the reaction liquid.

[0045] After the material is conveyed by the conveying pipe 23, the inner fixed cylinder 2 moves upward so that the filter plate 3 is separated from the receiving pool 4. Then the outer roller 1 rotates half a turn axially so that the filter plate 3, which was originally vertically downward, flips upward. The catalyst powder filtered out in the filter chamber will fall downward due to gravity. The catalyst powder falls through the receiving port 201 and is received by the receiving and conveying component 22.

[0046] The spring-loaded beam 33 is installed outside the filter membrane 32. The spring-loaded beam 33 includes a fixed frame 331, a rotating rod 332, a horizontal push rod 333, and a first spring 334. The fixed frame 331 is horizontally mounted between the side clamps 31. The rotating rod 332 is axially rotatable and mounted inside the fixed frame 331. Both ends of the rotating rod 332 are inserted into the side clamps 31.

[0047] The rotating rod 332 is equipped with a plurality of radially arranged first magnetic columns 335. When the rotating rod 332 rotates axially, the first magnetic columns 335 will flip along with the rotating rod 332. The rotating rod 332 is restricted to rotating only 90 degrees, that is, the first magnetic columns 335 can flip from a vertical state to a horizontal state.

[0048] One end of the first spring 334 is fixed to the fixing frame 331, and the other end is connected to the horizontal push rod 333. A second magnetic post 336 is axially installed inside the horizontal push rod 333 at the corresponding position of the first magnetic post 335. When the first magnetic column 335 is in a vertical state, the horizontal push rod 333, on which the second magnetic column 336 is installed, is less affected by the magnetic force and is held close to the filter membrane 32 by the first spring 334. When the first magnetic column 335 rotates and is placed horizontally, the magnetic poles of the first magnetic column 335 and the second magnetic column 336 are opposite each other. The horizontal push rod 333 will move a certain distance toward or away from the filter membrane 32 under the action of the magnetic force until the elastic force generated by the first spring 334 is balanced with the magnetic force. After that, when the first magnetic column 335 rotates vertically again, the first spring 334 will drive the horizontal push rod 333 to continuously impact the surface of the filter membrane 32. The filter membrane 32 has extensibility and will deform and vibrate after being impacted by the horizontal push rod 333. When the filter plate 3 rotates upward, the catalyst particles adhering to the inner side of the filter membrane 32 can be vibrated and detached from the filter membrane 32 and fall down.

[0049] The side clamping plate 31 is hollow inside, and the end of the rotating rod 332 inserted into the side clamping plate 31 is provided with a driven gear 337. The potential energy release assembly 34 is installed inside the side clamping plate 31. The potential energy release assembly 34 includes a fixed plate 341, a counterweight 342, and a second spring 343. When the filter plate 3 rotates upward, the fixed plate 341 is fixedly installed above the driven gear 337. The counterweight 342 is connected to the fixed plate 341 through the second spring 343. The counterweight 342 has teeth that can mesh with the driven gear 337. When the counterweight 342 moves vertically back and forth, it can drive the driven gear 337 to rotate back and forth axially. When the weight of the counterweight 342 is balanced with the elastic force of the second spring 343, the teeth of the counterweight 342 are above the driven gear 337.

[0050] When the filter plate 3 rotates downwards and submerges into the receiving pool 4, the counterweight 342 presses down on the second spring 343, causing the second spring 343 to contract, and the counterweight 342 moves toward the fixed plate 341. A positioning strip 344 is installed on the side of the counterweight 342 facing the fixed plate 341, and the fixed plate 341 has a positioning groove 301 that allows the positioning strip 344 to be inserted. When the counterweight 342 moves toward the fixed plate 341, the positioning strip 344 will be inserted into the positioning groove 301.

[0051] A locking block 345 is installed on the side wall of the positioning groove 301, and a locking socket 302 is provided on the side wall of the positioning strip 344. The locking block 345 can move horizontally to extend into the positioning groove 301 or move out of the positioning groove 301. When the positioning strip 344 is inserted into the positioning groove 301, the locking block 345 can move horizontally to insert into the locking socket 302, at which time the position of the positioning strip 344 in the positioning groove 301 will be locked by the locking block 345.

[0052] After the filter plate 3 rotates upward, the locking block 345 moves out of the locking socket 302, releasing the locking of the positioning strip 344. The counterweight 342 will move downward under the action of gravity and the elastic force of the second spring 343. The downward movement of the counterweight 342 will drive the driven gear 337 to rotate, which in turn will drive the rotating rod 332 to rotate axially, causing the first magnetic column 335 to flip. After the counterweight 342 moves downward a certain distance, the second spring 343 will rebound and pull the counterweight 342 upward again. During the upward movement of the counterweight 342, the driven gear 337 will be reset. The counterweight 342 moves up and down repeatedly until it finally stops. During this process, the first magnetic column 335 flips back and forth, continuously providing a pushing force to the horizontal push rod 333, causing the horizontal push rod 333 to continuously vibrate the surface of the filter membrane 32, causing the catalyst particles adhering to the surface of the filter membrane 32 to be vibrated and detach from the filter membrane 32 and fall down.

[0053] The locking block 345 has a first groove 303 on the side away from the positioning groove 301, and a second groove 304 on the side of the first groove 303 facing the counterweight 342. The first groove 303 and the second groove 304 are connected. A third magnetic column 346 that can move vertically is provided in the first groove 303. The magnetic poles of the third magnetic column 346 are axially distributed. A third spring 347 is installed on the side of the third magnetic column 346 away from the counterweight 342.

[0054] The locking block 345 is magnetic, with one end of the locking block 345 having a magnetic pole facing the first trough 303. The second trough 304 contains counterweight sand that can flow between the first trough 303 and the second trough 304.

[0055] like Figure 6 As shown, the third spring 347 can hold the third magnetic post 346 in a position close to the connection between the first drain 303 and the second drain 304 under normal conditions. When the filter plate 3 rotates upward, the magnetic pole of the upper part of the third magnetic post 346 is closer to the locking block 345, and the polarity of the magnetic pole of the upper part of the third magnetic post 346 is different from the magnetic pole of the locking block 345 facing the first drain 303. The locking block 345 will be attracted to the first drain 303 by the third magnetic post 346 and disengage from the positioning groove 301, and the counterweight 342 can move freely up and down.

[0056] When the filter plate 3 rotates downwards, the counterweight 342 moves down, causing the positioning strip 344 to insert into the positioning groove 301. At the same time, counterweight sand gradually flows from the second trough 304 into the first trough 303. The counterweight sand flowing into the first trough 303 will further press down the third magnetic column 346, causing the third magnetic column 346 to move down, so that the magnetic poles of the third magnetic column 346 and the locking block 345 facing the end of the first trough 303 are close to the locking block 345. At this time, the locking block 345 will be pushed into the positioning groove 301 by magnetic repulsion and move into the locking socket 302 to lock the position of the counterweight 342.

[0057] It is understandable that during the upward flipping process of the filter plate 3, since the counterweight sand is not completely transferred from the first trough 303 to the second trough 304, the third magnetic column 346 will still be blocked by the counterweight sand and cannot move to the second trough 304. The locking block 345 will still be affected by magnetic repulsion and lock the counterweight 342. After the filter plate 3 rotates upward for a period of time, the counterweight sand will be completely transferred from the first trough 303 to the second trough 304. Only then can the third magnetic column 346 move downward and attract the locking block 345 to unlock the counterweight 342. During the flipping process of the filter plate 3, the elastic potential energy of the second spring 343 will not be released prematurely and lost. All the potential energy of the second spring 343 can be released when the catalyst needs to be shaken off, so that the vibration time of the horizontal push rod 333 is longer and more catalyst on the surface of the filter membrane 32 can be shaken off and discharged.

[0058] A catalyst filtration method in a TMHDA synthesis process includes the following steps:

[0059] S1: Adjust the outer roller 1 to keep the filter plate 3 in a vertically downward position;

[0060] S2: Adjust the vertical position of the inner fixed cylinder 2 so that the filter plate 3 extends into the water level holding chamber 401;

[0061] S3: Inject the reaction liquid mixed with the catalyst into the central cylinder 21. After all the liquid phase of the reaction liquid flows into the receiving tank 4, extract the liquid phase in the receiving tank 4.

[0062] S4: Adjust the outer roller 1 to keep the filter plate 3 in a vertically upward position, and start the receiving and conveying device 22 to receive and convey the material to the outside of the central cylinder 21, and return it to the hydrogenation kettle for continued use.

[0063] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0064] In this invention, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "link," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0065] The control method of this invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Furthermore, since this invention is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail here.

[0066] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A catalyst filtration system for a TMHDA synthesis process, comprising an outer drum (1), an inner fixed drum (2), a filter plate (3), and a receiving pool (4), wherein the inner fixed drum (2) is movably mounted above the receiving pool (4), the outer drum (1) is coaxially sleeved outside the inner fixed drum (2) and is axially rotatable, and the filter plate (3) is mounted on the outer peripheral wall of the outer drum (1), forming a filter cavity within the filter plate (3), characterized in that: The upper part of the outer peripheral wall of the inner fixed cylinder (2) is provided with a receiving port (201), and the lower part of the outer peripheral wall of the inner fixed cylinder (2) is provided with a conveying port (202). When the outer roller (1) rotates to the point where the filter plate (3) is vertically upward, the filter plate (3) is connected to the receiving port (201). When the outer roller (1) rotates to the point where the filter plate (3) is vertically downward, the filter plate (3) is connected to the conveying port (202). The filter plate (3) includes a side clamping plate (31), a filter membrane (32), a spring beam (33), and a potential energy release assembly (34). The spring beam (33) is installed outside the filter membrane (32). The spring beam (33) includes a fixing frame (331), a rotating rod (332), a horizontal push rod (333), and a first spring (334). The rotating rod (332) is radially provided with a plurality of first magnetic pillars (335). The horizontal push rod (333) is connected to the fixing frame (331) through the first spring (334). The horizontal push rod (333) is equipped with a second magnetic pillar (336). The end of the rotating rod (332) inserted into the side clamping plate (31) is provided with a driven gear (337). The potential energy release component (34) includes a fixed plate (341), a counterweight (342), and a second spring (343). The counterweight (342) is connected to the fixed plate (341) through the second spring (343). The counterweight (342) is equipped with a positioning strip (344) on the side facing the fixing plate (341), and the fixing plate (341) has a positioning groove (301) that allows the positioning strip (344) to be inserted, and a locking block (345) is installed on the side wall of the positioning groove (301). The locking block (345) has a first groove (303) on the side away from the positioning groove (301), and the first groove (303) has a second groove (304) on the side facing the counterweight (342). The second trough (304) contains a counterweight fluid that can flow between the first trough (303) and the second trough (304); When the filter plate (3) rotates downwards, the counterweight (342) presses down the second spring (343), and the positioning strip (344) is locked in the positioning groove (301) by the locking block (345); When the filter plate (3) rotates upward, the counterweight fluid is completely transferred from the first trough (303) to the second trough (304). The locking block (345) releases the locking of the positioning strip (344), and the counterweight (342) moves downward, driving the driven gear (337) to rotate, which in turn drives the rotating rod (332) to rotate axially, causing the first magnetic column (335) to flip over, and continuously providing thrust to the horizontal push rod (333).

2. The catalyst filtration system in the TMDHA synthesis process according to claim 1, characterized in that: The inner cylinder (2) is equipped with a receiving and conveying component (22) and a conveying pipe (23), with the receiving and conveying component (22) installed above the conveying pipe (23).

3. The catalyst filtration system in the TMDHA synthesis process according to claim 1, characterized in that: Multiple membrane support beams (35) are cross-braced between the side clamps (31). The four sides of the filter membrane (32) are integrally connected to the side clamps (31) and the membrane support beams (35) to form a filter cavity in the filter plate (3). The filter membrane (32) only allows liquid to pass through and has extensibility.

4. The catalyst filtration system in the TMDHA synthesis process according to claim 1, characterized in that: The receiving pool (4) has a water level holding chamber (401) and a flow chamber (402), with the upper part of the water level holding chamber (401) connected to the flow chamber (402).

5. The catalyst filtration system in the TMDHA synthesis process according to claim 3, characterized in that: The rotating rod (332) is restricted to rotating only 90 degrees, and the driven gear (337) can mesh with the counterweight (342).

6. The catalyst filtration system in the TMDHA synthesis process according to claim 3, characterized in that: The sidewall of the positioning bar (344) has a locking socket (302) that allows the locking block (345) to be inserted.

7. The catalyst filtration system in the TMHDA synthesis process according to claim 6, characterized in that: The first drain (303) and the second drain (304) are connected. The first drain (303) is provided with a third magnetic column (346) that can move vertically. The magnetic poles of the third magnetic column (346) are axially distributed. The side of the third magnetic column (346) away from the counterweight (342) is connected to a third spring (347). The locking block (345) is magnetic, and one end of the locking block (345) has a magnetic pole facing the first drain (303). When the filter plate (3) rotates downward, the locking block (345) will be pushed by magnetic repulsion into the positioning groove (301) and moved into the locking socket (302) to lock the position of the counterweight (342); After the counterweight fluid has been completely transferred from the first drain (303) to the second drain (304), the third magnetic post (346) can move down to attract the locking block (345) to unlock the counterweight (342).

8. A catalyst filtration method in a TMHDA synthesis process, employing the catalyst filtration system in the TMHDA synthesis process as described in any one of claims 1-7, characterized in that, Includes the following steps: S1: Adjust the outer roller (1) to keep the filter plate (3) in a vertically downward position; S2: Adjust the vertical position of the inner fixed cylinder (2) so that the filter plate (3) extends into the water level holding chamber (401); S3: Inject the reaction liquid mixed with the catalyst into the central cylinder (21). After all the liquid phase of the reaction liquid flows into the receiving tank (4), extract the liquid phase in the receiving tank (4). S4: Adjust the outer roller (1) to keep the filter plate (3) in a vertically upward position, and start the receiving and conveying device (22) to receive and convey to the outside of the central cylinder (21) and return to the hydrogenation kettle for continued use.

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