Methanol to olefin catalyst wastewater centrifugal filtering device

Abstract

This invention relates to the field of wastewater filtration technology, addressing the problem of catalyst particles remaining in filtered water due to differences in catalyst particle size. Specifically, it provides a centrifugal filtration device for methanol-to-olefins catalyst wastewater, including a base and a drive unit mounted on top of it. It also includes a first filter assembly, a second filter assembly, and a third filter assembly for filtering methanol-to-olefins catalyst wastewater. This invention uses the first filter assembly for initial filtration of the wastewater, and the second filter assembly for further filtration while simultaneously separating the catalyst from the water. The separated water is then used to rinse the filter cartridge in the second filter assembly, discharging larger catalyst particles into the filter box of the third filter assembly. The cleaning components and filter plates further filter the wastewater, significantly reducing the amount of catalyst particles in the water and classifying the particles, thus improving overall efficiency.

Description

Technical Field

[0001] This invention relates to the field of wastewater filtration technology, specifically to a centrifugal filtration device for methanol-to-olefins catalyst wastewater. Background Technology

[0002] Methanol-to-olefins (MTO) catalysts are typically chemical substances used to catalyze the conversion of methanol into olefins (such as ethylene or propylene). This process is usually achieved by using special catalysts at appropriate temperatures and pressures. These catalysts can be solid or liquid, and they play a role in promoting or accelerating the reaction, causing methanol molecules to undergo specific transformations to produce olefin products. In the MTO catalytic reaction, the catalyst enters the wastewater system along with the wastewater. Common catalysts include ZSM-5 molecular sieve catalysts, alloy catalysts, zirconium oxide catalysts, and silicon-aluminum catalysts. These catalyst particles are reaction residues and need to be removed from the wastewater to maintain the performance and lifespan of the catalyst. Centrifugal filtration devices can be used to filter the catalyst out of the MTO wastewater.

[0003] Because the chemical composition, crystal structure and surface properties of the catalyst can affect its particle size, particles of different sizes are subjected to different centrifugal forces and settling velocities during the separation process of the centrifugal filtration device. Therefore, some catalyst particles will be discharged along with the filtered wastewater. Thus, the centrifugal filtration device for methanol-to-olefins catalyst wastewater may have the problem of some catalyst particles still being present in the filtered water during use. Summary of the Invention

[0004] In view of this, the purpose of this invention is to provide a centrifugal filtration device for methanol-to-olefins catalyst wastewater, so as to solve the problem that the filtered water still contains catalyst particles due to the different particle sizes of the catalyst.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is: a centrifugal filtration device for methanol-to-olefins catalyst wastewater, including a base and a drive component disposed on the upper end thereon, and further including a first filter assembly, a second filter assembly and a third filter assembly for filtering methanol-to-olefins catalyst wastewater.

[0006] The first filter assembly includes a housing fixed to the upper end of the base, a fixing ring fixed inside the housing, and filter cylinders rotatably disposed on both sides of the fixing ring. One set of filter cylinders has a connecting shaft fixed on one side, and the connecting shaft extends rotatably to the outside of the housing. A clutch is provided on one side of the connecting shaft. A water inlet pipe is rotatably connected to one side of the other set of filter cylinders. An annular seal for blocking the filter holes on the outside of the filter cylinders is provided inside the housing. A first pipe is connected to the lower end of the housing. A spray pipe for rinsing the filter cylinders is provided at the upper end of the housing.

[0007] The second filter assembly includes a housing fixed to the upper end of the base, a rotating drum rotatably disposed inside the housing, and a screw feeder. The screw feeder has a feed hole on its outer side. The first pipe extends into the interior of the screw feeder. The rotating drum has a slag discharge hole on its outer side at one end and a drain hole on its outer side at the other end. The lower end of one side of the housing is connected to a slag discharge pipe, and the lower end of the other side is connected to a drain pipe. The lower end of the drain pipe is connected to a water storage tank.

[0008] The third filter assembly includes a mounting base and a filter box located on the upper end of the mounting base, as well as a filter plate located inside the filter box and a cleaning component for cleaning the filter plate.

[0009] Preferably, the annular seal is symmetrically arranged and has an open upper end. Parallel pneumatic grippers are symmetrically arranged inside the housing, and the telescopic ends of the parallel pneumatic grippers are connected to the annular seal.

[0010] Preferably, a connecting rod is fixedly installed inside one set of the filter cartridges, and one end of the connecting rod is fixedly connected to another set of the filter cartridges.

[0011] Preferably, the lower end of the fixing ring is provided with a discharge port, the lower end of the discharge port is connected to a second pipe, the second pipe is provided with a solenoid valve, and one end of the second pipe is connected to the upper end of the filter box.

[0012] Preferably, a pump body is installed on one side of the water storage tank, with its input end connected to the inside of the water storage tank, and the output end of the pump body connected to a third pipe, which is connected to a spray pipe.

[0013] Preferably, the cleaning component includes a first rotating shaft rotatably mounted on the upper end of the fixed base, a drive rod fixedly connected to the upper end of the first rotating shaft, a connecting rod rotatably connected to one end of the drive rod, and a slider rotatably connected to one end of the connecting rod. The upper end of the filter box is provided with a slide rail, the slider is slidably connected inside the slide rail, the lower end of the slider is provided with a push plate, and a first bevel gear is sleeved on the outer side of the first rotating shaft.

[0014] Preferably, a second rotating shaft is rotatably provided on the upper end of the fixed base, and a second bevel gear is provided at one end of the second rotating shaft. The second bevel gear meshes with the first bevel gear. A discharge port is provided on one side of the filter box, and a water outlet pipe is connected to one side of the filter box.

[0015] Preferably, the drive component includes a motor and a first pulley located on the motor output shaft, and also includes a second pulley located at one end of the drum and a differential. A first transmission belt is provided between the first pulley and the second pulley. A third pulley and a fourth pulley are provided at the other end of the drum via a shaft. A fifth pulley is provided at one end of the clutch via a shaft. A second transmission belt is provided between the third pulley and the fifth pulley. A sixth pulley is provided on the outer side of the second rotating shaft. A third transmission belt is provided between the fourth pulley and the sixth pulley.

[0016] The beneficial effects of this invention are:

[0017] This invention uses a first filtration component to initially filter methanol-to-olefins catalyst wastewater, allowing smaller catalyst particles and water to enter a second filtration component. The second filtration component, with its rotating drum and screw conveyor, performs solid-liquid separation, discharging the water and catalyst separately. During this process, larger catalyst particles remain in the filter cylinder of the first filtration component, resulting in a more uniform concentration of catalyst particles in the wastewater within the second filtration component. This enhances the solid-liquid separation efficiency. After solid-liquid separation, the water is reused by flushing the filter cylinder through a spray pipe and an annular seal. Subsequently, the water and larger catalyst particles are discharged together through a second pipe into a filter box, where the water is filtered by a filter plate. A cleaning component removes the catalyst particles remaining on the upper part of the filter plate through the outlet. This process significantly reduces the size of the catalyst particles in the wastewater, allowing for further filtration. Furthermore, the filtered catalyst particles of different sizes are sorted for subsequent use, further improving overall efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the structure of the first filter component of the present invention;

[0020] Figure 3 This is a schematic diagram of the annular seal structure of the present invention;

[0021] Figure 4 This is a schematic diagram of the filter cartridge structure of the present invention;

[0022] Figure 5 This is a cross-sectional view of the filter cylinder and fixing ring of the present invention;

[0023] Figure 6 This is a schematic diagram of the structure of the second filter component of the present invention;

[0024] Figure 7This is a schematic diagram of the third filter component structure of the present invention;

[0025] Figure 8 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0026] In the diagram: 1. Base; 2. First filter assembly; 21. Housing; 211. First pipe; 212. Second pipe; 22. Fixing ring; 221. Discharge port; 23. Filter cylinder; 231. Connecting shaft; 232. Water inlet pipe; 233. Connecting rod; 234. Clutch; 24. Parallel pneumatic gripper; 241. Annular seal; 3. Second filter assembly; 31. Housing; 311. Slag discharge pipe; 312. Drain pipe; 32. Drum; 321. Slag discharge hole; 322. Drain hole; 33. Screw feeder; 331. Feed hole; 4. Third filter assembly; 41. Fixing base; 411. Second rotating shaft; 412. Second bevel gear; 42. Filter box; 421, Filter plate; 422, Discharge port; 423, Water outlet pipe; 43, Cleaning component; 431, First rotating shaft; 4311, First bevel gear; 432, Drive rod; 433, Connecting rod; 434, Slider; 4341, Push plate; 435, Slide rail; 5, Water storage tank; 51, Pump body; 52, Third pipe; 521, Spray nozzle; 6, Drive component; 61, Motor; 62, First pulley; 621, First transmission belt; 63, Second pulley; 64, Third pulley; 641, Second transmission belt; 65, Fourth pulley; 651, Third transmission belt; 66, Fifth pulley; 67, Sixth pulley; 68, Differential. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0028] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "comprising" or "including," and similar terms used in this disclosure, mean that an element or object preceding the term encompasses the elements or objects listed following the term and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0029] like Figures 1 to 8 As shown, the present invention provides a centrifugal filtration device for methanol-to-olefins catalyst wastewater, including a base 1 and a drive component 6 disposed on its upper end, and also including a first filter assembly 2, a second filter assembly 3 and a third filter assembly 4 for filtering methanol-to-olefins catalyst wastewater.

[0030] The first filter assembly 2 includes a housing 21 fixed to the upper end of the base 1, a fixing ring 22 fixed inside the housing 21, and filter cylinders 23 rotatably disposed on both sides of the fixing ring 22. One set of filter cylinders 23 is fixed to one side with a connecting shaft 231, and the connecting shaft 231 rotatably extends to the outside of the housing 21. A clutch 234 is provided on one side of the connecting shaft 231. The other set of filter cylinders 23 is rotatably connected to a water inlet pipe 232. The inside of the housing 21 is provided with an annular seal 241 for blocking the filter holes on the outside of the filter cylinders 23. The lower end of the housing 21 is connected to a first pipe 211. The upper end of the housing 21 is provided with a spray pipe 521 for rinsing the filter cylinders 23.

[0031] The second filter assembly 3 includes a housing 31 fixed to the upper end of the base 1, a rotating drum 32 rotatably disposed inside it, and a screw feeder 33. The screw feeder 33 has a feed hole 331 on its outer side. The first pipe 211 extends into the interior of the screw feeder 33. The rotating drum 32 has a slag discharge hole 321 on its outer side at one end and a drain hole 322 on its outer side at the other end. The lower end of one side of the housing 31 is connected to a slag discharge pipe 311, and the lower end of the other side is connected to a drain pipe 312. The lower end of the drain pipe 312 is connected to a water storage tank 5.

[0032] The third filter assembly 4 includes a fixed base 41 and a filter box 42 disposed on the upper end of the fixed base 41, and also includes a filter plate 421 disposed inside the filter box 42 and a cleaning component 43 for cleaning the filter plate 421.

[0033] In this embodiment, firstly, the controller (not shown in the diagram) drives the various components to operate. Then, the methanol-to-olefins catalyst wastewater enters the filter cylinder 23 through the inlet pipe 232. Driven by the controller 6, the connecting shaft 231 rotates the filter cylinder 23, generating centrifugal force. Smaller catalyst particles and water in the wastewater pass through the filter holes on the outside of the filter cylinder 23 and are discharged into the outer shell 21, then through the first pipe 211. Larger catalyst particles remain inside the filter cylinder 23. The wastewater and some smaller catalyst particles then enter the spiral pusher through the first pipe 211. Inside the feeder 33, the centrifugal force generated by the rotation of the screw feeder 33 and the drum 32 causes catalyst particles inside the screw feeder 33 to be thrown out through the feed hole 331 and deposited on the inside of the drum 32, forming a sludge layer. As the screw feeder 33 rotates, the deposited catalyst particles are continuously pushed to the sludge discharge hole 321 and discharged through it, then through the sludge discharge pipe 311. The filtered water forms an inner liquid ring, is discharged through the drain hole 322 at the other end of the drum 32, and enters the water storage tank 5 through the drain pipe 312. By activating pump body 51, water inside water storage tank 5 is pumped into nozzle 521 and sprayed out from nozzle 521. The annular seal 241 blocks the filter holes on the outside of filter cylinder 23, leaving only the upper filter holes exposed. The water sprayed from nozzle 521 washes the upper filter holes of filter cylinder 23 and flows into the interior of filter cylinder 23. Clutch 234 controls the connection and disconnection between connecting shaft 231 and one end of the shaft, thus controlling the rotation and stop of connecting shaft 231. After the upper filter holes of filter cylinder 23 are washed, the clutch 234 can be used to stop the flow. 4. Control the connecting shaft 231 to connect with the shaft at one end, and after the filter cylinder 23 rotates one unit, the other row of filter holes of the filter cylinder 23 is flushed. In this way, the filter holes on the outside of the filter cylinder 23 can be flushed. After flushing, there is a certain amount of water inside the filter cylinder 23. At this time, the solenoid valve (not shown in the figure) in the second pipe 212 is opened by controlling the filter cylinder 23 and the fixed ring 22 to discharge the water and larger particles of catalyst inside the filter cylinder 23 and the fixed ring 22 through the discharge port 221 and the second pipe 212 into the filter box 42. After being filtered by the filter box 42, the water is discharged through the water outlet pipe 423.

[0034] As one implementation method, such as Figure 3 As shown, going a step further:

[0035] The annular seal 241 is symmetrically arranged and has an open upper end. Parallel pneumatic grippers 24 are symmetrically arranged inside the housing 21. The telescopic ends of the parallel pneumatic grippers 24 are connected to the annular seal 241.

[0036] In this embodiment, in the initial state, the annular seal 241 is not in contact with the filter cylinder 23, so that it does not affect the normal operation of the filter cylinder 23. When it is necessary to rinse the filter holes on the outside of the filter cylinder 23, the parallel pneumatic gripper 24 is activated, so that the parallel pneumatic gripper 24 drives the annular seal 241 to wrap the outside of the filter cylinder 23. It should be noted that wrapping the outside of the filter cylinder 23 does not affect the rotation of the filter cylinder 23, but only blocks the filter holes of the filter cylinder 23.

[0037] As one implementation method, such as Figure 5 As shown, going a step further:

[0038] A connecting rod 233 is fixedly installed inside a set of filter cartridges 23, and one end of the connecting rod 233 is fixedly connected to another set of filter cartridges 23.

[0039] In this embodiment, when the connecting shaft 231 drives a set of filter cylinders 23 to rotate, the set of filter cylinders 23 drives another set of filter cylinders 23 to rotate through the connecting rod 233, so that the two sets of filter cylinders 23 rotate simultaneously.

[0040] As one implementation method, such as Figure 2 and Figure 5 As shown, going a step further:

[0041] The lower end of the fixed ring 22 is provided with a discharge port 221, and the lower end of the discharge port 221 is connected to a second pipe 212. The second pipe 212 is equipped with a solenoid valve, and one end of the second pipe 212 is connected to the upper end of the filter box 42.

[0042] In this embodiment, by controlling the opening of the solenoid valve, the water and large particles of catalyst inside the filter cartridge 23 and the fixing ring 22 are discharged from the discharge port 221 and the second pipe 212.

[0043] As one implementation method, such as Figure 2 and Figure 8 As shown, going a step further:

[0044] A pump body 51 is installed on one side of the water storage tank 5. Its input end is connected to the inside of the water storage tank 5, and the output end of the pump body 51 is connected to a third pipe 52. The third pipe 52 is connected to the nozzle 521.

[0045] In this embodiment, by activating the pump body 51, the pump body 51 draws water from inside the water storage tank 5 into the third pipe 52, and sprays it out from the nozzle 521 through the third pipe 52, thereby rinsing the filter holes on the outside of the filter cylinder 23.

[0046] As one implementation method, such as Figure 7 As shown, going a step further:

[0047] The cleaning component 43 includes a first rotating shaft 431 rotatably mounted on the upper end of the fixed base 41, a drive rod 432 fixedly connected to the upper end of the first rotating shaft 431, a connecting rod 433 rotatably connected to one end of the drive rod 432, and a slider 434 rotatably connected to one end of the connecting rod 433. The upper end of the filter box 42 is provided with a slide rail 435, the slider 434 is slidably connected inside the slide rail 435, the lower end of the slider 434 is provided with a push plate 4341, and a first bevel gear 4311 is sleeved on the outer side of the first rotating shaft 431.

[0048] In this embodiment, the rotation of the first rotating shaft 431 drives the drive rod 432 to rotate. The rotation of the drive rod 432 causes the connecting rod 433 to swing. Under the action of the sliding connection between the slide rail 435 and the slider 434, the slider 434 can form a linear reciprocating movement inside the slide rail 435, thereby driving the push plate 4341 to reciprocate, so that the push plate 4341 pushes the large particles of catalyst at the upper end of the filter plate 421.

[0049] As one implementation method, such as Figure 7 As shown, going a step further:

[0050] A second rotating shaft 411 is rotatably mounted on the upper end of the fixed base 41. A second bevel gear 412 is mounted on one end of the second rotating shaft 411. The second bevel gear 412 meshes with the first bevel gear 4311. A discharge port 422 is opened on one side of the filter box 42. A water outlet pipe 423 is connected to one side of the filter box 42.

[0051] In this embodiment, the second bevel gear 412 is driven to rotate by the second rotating shaft 411, and the second bevel gear 412 meshes with and drives the first bevel gear 4311 to rotate. The first bevel gear 4311 drives the first rotating shaft 431 to rotate. Under the push of the push plate 4341, the larger catalyst particles are discharged through the discharge port 422, while water is discharged from the water outlet pipe 423, thereby completing further filtration.

[0052] As one implementation method, such as Figure 1 and Figure 2 , Figures 6 to 8 As shown, going a step further:

[0053] The drive unit 6 includes a motor 61 and a first pulley 62 located on the output shaft of the motor 61. It also includes a second pulley 63 located at one end of the drum 32 and a differential 68. A first transmission belt 621 is provided between the first pulley 62 and the second pulley 63. A third pulley 64 and a fourth pulley 65 are provided at the other end of the drum 32 via a shaft. A fifth pulley 66 is provided at one end of the clutch 234 via a shaft. A second transmission belt 641 is provided between the third pulley 64 and the fifth pulley 66. A sixth pulley 67 is provided on the outer side of the second rotating shaft 411. A third transmission belt 651 is provided between the fourth pulley 65 and the sixth pulley 67.

[0054] In this embodiment, the motor 61 drives the first pulley 62 to rotate, and the first pulley 62 drives the second pulley 63 to rotate via the first transmission belt 621, causing the drum 32 to rotate. The drum 32 drives the third pulley 64 and the fourth pulley 65 to rotate. The third pulley 64 drives the second transmission belt 641 to rotate, thereby driving the fifth pulley 66 to rotate, thus causing the connecting shaft 231 to rotate. The fourth pulley 65 drives the sixth pulley 67 to rotate via the third transmission belt 651, thereby driving the second rotating shaft 411 to rotate.

[0055] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its spirit and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of the present invention.

Claims

1. A centrifugal filtration device for methanol-to-olefins catalyst wastewater, comprising a base (1) and a drive component (6) disposed at its upper end, characterized in that, It also includes a first filter assembly (2), a second filter assembly (3) and a third filter assembly (4) for filtering methanol-to-olefins catalyst wastewater. The first filter assembly (2) includes a housing (21) fixed to the upper end of the base (1), a fixing ring (22) fixed inside the housing (21), and filter cylinders (23) rotatably disposed on both sides of the fixing ring (22). One set of filter cylinders (23) is fixed to one side with a connecting shaft (231), and the connecting shaft (231) rotatably extends to the outside of the housing (21). A clutch (234) is provided on one side of the connecting shaft (231). Another set of filter cylinders (23) is rotatably connected to a water inlet pipe (232). The inside of the housing (21) is provided with an annular seal (241) for blocking the filter holes on the outside of the filter cylinders (23). The lower end of the housing (21) is connected to a first pipe (211). The upper end of the housing (21) is provided with a spray pipe (521) for rinsing the filter cylinders (23). The second filter assembly (3) includes a housing (31) fixed to the upper end of the base (1), a rotating drum (32) rotatably disposed inside it, and a screw feeder (33). The screw feeder (33) has a feed hole (331) on its outer side. The first pipe (211) extends into the interior of the screw feeder (33). The rotating drum (32) has a slag discharge hole (321) on its outer side at one end and a drain hole (322) on its outer side at the other end. The lower end of one side of the housing (31) is connected to a slag discharge pipe (311), and the lower end of the other side is connected to a drain pipe (312). The lower end of the drain pipe (312) is connected to a water storage tank (5). The third filter assembly (4) includes a fixed base (41) and a filter box (42) located at the upper end of the fixed base (41), as well as a filter plate (421) located inside the filter box (42) and a cleaning component (43) for cleaning the filter plate (421). The annular seal (241) is symmetrically arranged and has an open upper end. The interior of the outer shell (21) is symmetrically provided with parallel pneumatic grippers (24), and the telescopic ends of the parallel pneumatic grippers (24) are connected to the annular seal (241). In the initial state, the annular seal (241) and the filter cylinder (23) are not in contact, so that it does not affect the normal operation of the filter cylinder (23). When it is necessary to flush the filter holes on the outside of the filter cylinder (23), the parallel pneumatic gripper (24) is activated, so that the parallel pneumatic gripper (24) drives the annular seal (241) to wrap the outside of the filter cylinder (23). By controlling the annular seal (241) to block the filter holes on the outside of the filter cylinder (23), the filter cylinder (23) is only exposed at the top of the filter hole. Wrapping the outside of the filter cylinder (23) does not affect the rotation of the filter cylinder (23), but only blocks the filter holes of the filter cylinder (23).

2. The centrifugal filtration device for methanol-to-olefins catalyst wastewater according to claim 1, characterized in that: A connecting rod (233) is fixedly installed inside one set of the filter cylinders (23), and one end of the connecting rod (233) is fixedly connected to another set of the filter cylinders (23).

3. The centrifugal filtration device for methanol-to-olefins catalyst wastewater according to claim 2, characterized in that: The lower end of the fixed ring (22) is provided with a discharge port (221), and the lower end of the discharge port (221) is connected to a second pipe (212). The second pipe (212) is provided with a solenoid valve inside, and one end of the second pipe (212) is connected to the upper end of the filter box (42).

4. The centrifugal filtration device for methanol-to-olefins catalyst wastewater according to claim 3, characterized in that: A pump body (51) is installed on one side of the water storage tank (5), with its input end connected to the inside of the water storage tank (5). The output end of the pump body (51) is connected to a third pipe (52), which is connected to the nozzle (521).

5. The centrifugal filtration device for methanol-to-olefins catalyst wastewater according to claim 4, characterized in that: The cleaning component (43) includes a first rotating shaft (431) rotatably mounted on the upper end of the fixed base (41), a drive rod (432) fixedly connected to the upper end of the first rotating shaft (431), a connecting rod (433) rotatably connected to one end of the drive rod (432), and a slider (434) rotatably connected to one end of the connecting rod (433). The upper end of the filter box (42) is provided with a slide rail (435), the slider (434) is slidably connected inside the slide rail (435), the lower end of the slider (434) is provided with a push plate (4341), and a first bevel gear (4311) is sleeved on the outer side of the first rotating shaft (431).

6. The centrifugal filtration device for methanol-to-olefins catalyst wastewater according to claim 5, characterized in that: The upper end of the fixed base (41) is rotatably provided with a second rotating shaft (411), and a second bevel gear (412) is provided at one end of the second rotating shaft (411). The second bevel gear (412) meshes with the first bevel gear (4311). A discharge port (422) is opened on one side of the filter box (42), and a water outlet pipe (423) is connected to one side of the filter box (42).

7. The centrifugal filtration device for methanol-to-olefins catalyst wastewater according to claim 6, characterized in that: The drive unit (6) includes a motor (61) and a first pulley (62) located on the output shaft of the motor (61). It also includes a second pulley (63) and a differential (68) located at one end of the drum (32). A first transmission belt (621) is provided between the first pulley (62) and the second pulley (63). A third pulley (64) and a fourth pulley (65) are provided at the other end of the drum (32) via a shaft. A fifth pulley (66) is provided at one end of the clutch (234) via a shaft. A second transmission belt (641) is provided between the third pulley (64) and the fifth pulley (66). A sixth pulley (67) is provided on the outside of the second rotating shaft (411). A third transmission belt (651) is provided between the fourth pulley (65) and the sixth pulley (67).

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