Raw material filtering device for pyromellitic dianhydride production

Abstract

The invention relates to the technical field of pyromellitic dianhydride production, in particular to a raw material filtering device for pyromellitic dianhydride production, which comprises a filter press body, a plurality of filter pressing plates arranged at the filter pressing end of the filter press body, a filter pressing driving mechanism and a device frame, the filter pressing driving mechanism and the device frame are connected onto the side wall of the filter press body, and a water pump is mounted at the top end of the device frame. Two cleaning mechanisms are arranged in an inner cavity of the device frame. According to the device, adsorption holes are prevented from being blocked during subsequent adsorption from the source in a stage treatment mode of first washing and then adsorption; the rotary adsorption wheel is matched with negative pressure adsorption to remove fine impurities embedded in pores of the filter pressing plate, the rotary washing pipe can realize uniform water spraying through angle switching, and the rotary adsorption wheel can switch a material suction groove, so that the problem of non-uniform local cleaning is solved, and the problems of relatively small water flow and difficulty in falling of impurities caused by small pores of filter cloth in backwashing are solved; the cleaning time is shortened, the cleaning process is simplified, and the cleaning effect and efficiency of the filter cloth are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of pyromellitic dianhydride production technology, and specifically to a raw material filtration device for pyromellitic dianhydride production. Background Technology

[0002] Chinese patent application CN202420909251.0 discloses a pyromellitic dianhydride raw material filtration device, including a filtration mechanism. The filtration mechanism includes a material tank with several mounting blocks inside. A filter screen is mounted on each mounting block. A movable baffle is located on one side of the filter screen, and a sliding groove is located on one side of the movable baffle. A round rod is mounted in the sliding groove, and a fixed block is located on the movable baffle. A column is located on the material tank, and an auxiliary wheel is mounted on the column. A first motor is located at the rear of the material tank, and a drive wheel is mounted on the first motor. A traction rope is mounted on the drive wheel. A placement plate is located at the front of the material tank, and a second motor is mounted on the placement plate. The first motor drives the drive wheel to rotate, and through the cooperation of the traction rope and the auxiliary wheel, the movable baffle moves along the sliding groove to adjust the size of the filter screen opening. The second motor drives the lead screw to rotate, causing the sliding block to slide within a limiting groove, thereby causing the scraper on the support arm to reciprocate on the filter screen, realizing automatic cleaning of impurities on the filter screen surface.

[0003] In the prior art, including the aforementioned patents, the backwashing cleaning method simply involves using clean water to rinse the filter cloth from the inside out in reverse. This cleaning method has the following main problems: Because the filter cloth has small pores, the water flow during backwashing is small, making it difficult to wash away stubborn impurities stuck in the pores, resulting in poor washing effect. In addition, this washing method is time-consuming, and impurities attached to the surface of the filter cloth need to be cleaned again by other cleaning devices, which is cumbersome. Summary of the Invention

[0004] The purpose of this invention is to provide a raw material filtration device for the production of pyromellitic dianhydride. By using a rotating adsorption wheel in conjunction with negative pressure adsorption, fine impurities embedded in the pores of the filter press are removed. The rotating flushing pipe can achieve uniform water spraying by switching angles, and the rotating adsorption wheel can switch the suction tank. This not only solves the problem of uneven cleaning in certain areas, but also avoids the problem of small water flow and difficulty in removing impurities due to the small pores of the filter cloth during backwashing. It shortens the cleaning time, simplifies the cleaning process, and significantly improves the cleaning effect and efficiency of the filter cloth.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A raw material filtration device for the production of pyromellitic dianhydride includes a filter press body, multiple filter plates disposed at the filter press end of the filter press body, a filter press drive mechanism and a device frame connected to the side wall of the filter press body, a water pump installed at the top of the device frame, and two cleaning mechanisms provided in the inner cavity of the device frame. The cleaning mechanism includes: A lifting drive assembly is installed at the top of the device frame. One end of the lifting drive assembly is provided with two connecting adjustment components, and one end of each of the two connecting adjustment components is equipped with a cleaning execution component. The cleaning execution component includes a mounting frame, and two rotating flushing wheels are rotatably provided in the inner cavity of the mounting frame. One end of each of the two rotating flushing wheels is connected to a water pump through a hose. The inner cavity of the mounting frame is also equipped with two rotating adsorption wheels. One end of each of the two rotating adsorption wheels is connected to an air pump through a pipe. The air pump is located at the top of the filter press drive mechanism. The rotating adsorption wheels are connected to the rotating rinsing wheels via a drive mechanism.

[0006] In a preferred embodiment of the present invention, the lifting drive assembly includes two lifting drivers. One end of each lifting driver is connected to the top and bottom side walls of the inner cavity of the device frame, respectively. The other end of each lifting driver is connected to a lifting frame. Positioning blocks are provided on both sides of the lifting frame. A guide rod slides through the center of each positioning block. One end of the guide rod is connected to the inner side wall of the water pump, and the other end of the guide rod is connected to the two end side walls of the filter press body.

[0007] In a preferred embodiment of the present invention, the connection adjustment assembly includes an adjustment driver, which is located at the bottom of the lifting frame. The bottom of the adjustment driver is provided with two adjustment arms, the other end of each adjustment arm is provided with a connecting rod, and the other end of each connecting rod is provided with a mounting seat. The mounting seat is connected to the side wall of the mounting frame, and a water supply pipe is provided through the side wall of the mounting seat. The inner cavity of the mounting seat is provided with a rotary motor, and the power output end of the rotary motor is provided with a double-grooved wheel.

[0008] As a preferred embodiment of the present invention, the bottom end of the mounting frame is provided with a main flushing nozzle assembly, the main flushing nozzle assembly is provided with a plurality of nozzles arranged in an array, the input ends of the plurality of nozzles are all connected to a water supply pipe, and the other end of the water supply pipe is connected to the output end of a water pump through a hose.

[0009] In a preferred embodiment of the present invention, two of each of the rotating flushing wheel and the rotating adsorption wheel are provided. Multiple flushing nozzles are provided on the outer sides of the two rotating flushing wheels, and a driven gear is provided at one end of each rotating flushing wheel. Multiple suction grooves arranged in a circular array are provided on the outer walls of the two rotating adsorption wheels. A transmission gear is provided at one end of each rotating adsorption wheel, and a driving gear meshes with the driven gear. A transmission shaft is provided at the center of each of the two driving gears. One end of the transmission shaft is rotatably connected to the side wall of the mounting frame, and the other end of the transmission shaft is provided with a single-groove wheel. The single-groove wheel is connected to a double-groove wheel via a belt. A discharge port is provided at the other end of each rotating adsorption wheel.

[0010] As a preferred embodiment of the present invention, one end of the rotating flushing wheel and the rotating adsorption wheel are provided with a sealed bearing, and the rotating flushing wheel and the rotating adsorption wheel are rotatably connected to the side wall of the mounting frame through the sealed bearing. The other end of the sealed bearing is sealed and connected to a flange mounting port.

[0011] As a preferred embodiment of the present invention, one side of each of the two rotating adsorption wheels is in contact with the surface of the filter press plate.

[0012] The inner cavity of the mounting frame is provided with multiple arc-shaped baffles, and the inner sidewalls of the multiple arc-shaped baffles are respectively in contact with the rotating flushing wheel and the rotating adsorption wheel.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This device employs a tiered treatment method of rinsing followed by adsorption. First, pressurized water flow, combined with the lifting and lowering motion of the main rinsing nozzle assembly, removes large particles of impurities adhering to the surface of the filter press plate, preventing blockage of the adsorption pores during subsequent adsorption. Then, a rotating adsorption wheel, combined with negative pressure adsorption, removes fine impurities embedded in the pores of the filter press plate. Simultaneously, the rotating rinsing pipe can switch angles to achieve uniform water spraying, and the rotating adsorption wheel can switch the suction trough. Compared to the traditional single rinsing method, this solves the problem of uneven cleaning in certain areas and avoids the issues of insufficient water flow and difficulty in removing impurities during backwashing due to the small pores of the filter cloth. This shortens the cleaning time, simplifies the cleaning process, and significantly improves the cleaning effect and efficiency of the filter cloth. 2. This device enables simultaneous rinsing and adsorption processes. While the rotating adsorption wheel removes fine impurities, it can simultaneously remove residual moisture from the surface of the filter press plate, directly eliminating the need for subsequent water stain cleaning and drying processes on the filter press plate, thus shortening the overall cleaning and filter plate assembly process. Furthermore, the negative pressure adsorption allows the rotating adsorption wheel to directly adhere to the surface of the filter press plate. Compared to the traditional backwashing method, there is no need to increase the water pressure from the inside, making impurity removal more direct and efficient, further improving the efficiency of the cleaning operation and reducing the time spent on cleaning due to downtime. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram showing the connection between the cleaning mechanism and the filter press plate of the present invention; Figure 3This is a schematic diagram of the lifting drive assembly and the connection adjustment assembly of the present invention; Figure 4 This is a schematic diagram of the structure of the adjusting driver of the present invention; Figure 5 This is a schematic diagram of the mounting frame of the present invention; Figure 6 This is a schematic diagram of the structure of the cleanup execution component of the present invention; Figure 7 For the present invention Figure 6 Enlarged structural diagram at point A; Figure 8 This is a schematic diagram of the structure of the drive gear of the present invention; Figure 9 This is a front view structural diagram of the present invention.

[0016] In the diagram: 1. Filter press body; 11. Filter press plate; 12. Filter press drive mechanism; 13. Air pump; 2. Device frame; 3. Water pump; 4. Cleaning mechanism; 41. Lifting drive assembly; 411. Lifting driver; 412. Lifting frame; 413. Positioning block; 414. Guide rod; 42. Connection and adjustment assembly; 421. Adjustment driver; 422. Adjusting arm; 423. Connecting rod; 424. Mounting base; 425. Water supply pipe; 426. Rotary motor; 43. Cleaning execution assembly; 431. Mounting frame; 432. Rotary flushing wheel; 433. Rotary adsorption wheel; 434. Main flushing nozzle assembly; 435. Driven gear; 436. Transmission gear; 437. Driven gear; 438. Transmission shaft; 439. Sealed bearing; 410. Flange mounting port. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0018] like Figures 1-9As shown, this invention provides a raw material filtration device for the production of pyromellitic dianhydride, comprising a filter press body 1, multiple filter plates 11 disposed at the filter pressing end of the filter press body 1, a filter press drive mechanism 12 connected to the side wall of the filter press body 1, and a device frame 2. A water pump 3 is installed at the top of the device frame 2, and two cleaning mechanisms 4 are provided in the inner cavity of the device frame 2. The cleaning mechanism 4 includes: a lifting drive assembly 41 installed at the top of the device frame 2, with two connecting adjustment assemblies 42 provided at one end of the lifting drive assembly 41, and a cleaning execution assembly 43 installed at one end of each of the two connecting adjustment assemblies 42; the cleaning execution assembly 43 includes a mounting frame 431, and two rotating punches are rotatably provided in the inner cavity of the mounting frame 431. The washing wheel 432 has one end connected to the water pump 3 via a hose; the inner cavity of the mounting frame 431 also has two rotating adsorption wheels 433, one end of which is connected to the suction pump 13 via a pipe. The suction pump 13 is located at the top of the filter press drive mechanism 12, and the rotating adsorption wheels 433 are connected to the rotating washing wheels 432 in a transmission connection; by integrating the "washing + adsorption" dual-function cleaning structure and realizing the transmission linkage between the rotating washing wheels 432 and the rotating adsorption wheels 433, a structural basis is provided for the subsequent synchronous cleaning of impurities on the surface of the filter press plate 11, avoiding the cumbersome step-by-step operation required by the traditional single cleaning device, and initially improving the coordination of the cleaning operation.

[0019] Furthermore, the lifting drive assembly 41 includes two lifting drivers 411. One end of each lifting driver 411 is connected to the top and bottom side walls of the inner cavity of the device frame 2, respectively. The other end of each lifting driver 411 is connected to a lifting frame 412. Positioning blocks 413 are provided on both sides of the lifting frame 412. A guide rod 414 slides through the center of the positioning block 413. One end of the guide rod 414 is connected to the inner side wall of the water pump 3, and the other end is connected to the two end side walls of the filter press body 1. The lifting drivers 411 provide stable lifting power, which, together with the sliding guide structure of the positioning blocks 413 and the guide rod 414, ensures that the lifting frame 412 drives the subsequent cleaning execution assembly 43 to make smooth lifting movements. This avoids the problem of incomplete cleaning of the filter plate 11 caused by the lifting and lowering deviation of the cleaning execution assembly 43, and improves the comprehensiveness of cleaning coverage.

[0020] Furthermore, the connecting adjustment assembly 42 includes an adjustment driver 421, which is located at the bottom of the lifting frame 412. Two adjustment arms 422 are located at the bottom of the adjustment driver 421. A connecting rod 423 is located at the other end of each adjustment arm 422, and a mounting seat 424 is located at the other end of each connecting rod 423. The mounting seat 424 is connected to the side wall of the mounting frame 431. A water supply pipe 425 passes through the side wall of the mounting seat 424. A rotary motor 426 is located inside the mounting seat 424, and a double-grooved wheel is located at the power output end of the rotary motor 426. By adjusting the adjustment driver 421, the adjustment arms 422 and connecting rod 423 can be driven to flexibly adjust the position of the mounting seat 424 and the cleaning execution assembly 43, precisely controlling the fit between the rotary flushing wheel 432, the rotary adsorption wheel 433, and the filter plate 11. Simultaneously, the water supply pipe 425 provides a stable water path for flushing, and the rotary motor 426 and the double-grooved wheel provide power to the transmission components, ensuring efficient connection of each stage of the cleaning operation.

[0021] Furthermore, the bottom of the mounting frame 431 is provided with a main flushing nozzle assembly 434, which has multiple nozzles arranged in an array. The input ends of the multiple nozzles are connected to the water supply pipe 425, and the other end of the water supply pipe 425 is connected to the water pump 3 through a hose. The array of nozzles, together with the pressurized water flow provided by the water pump 3, can uniformly and powerfully flush the surface of the filter plate 11, effectively removing large particle impurities and preventing large particles from clogging the suction groove of the rotating adsorption wheel 433 during subsequent adsorption. Compared with the traditional single flushing method, this improves the uniformity and thoroughness of the initial cleaning.

[0022] Furthermore, there are two rotating flushing wheels 432 and two rotating suction wheels 433. Multiple flushing nozzles are provided on the outer sides of the two rotating flushing wheels 432, and a driven gear 435 is provided at one end of each rotating flushing wheel 432. Multiple suction grooves arranged in a circular array are provided on the outer walls of the two rotating suction wheels 433. A transmission gear 436 is provided at one end of each rotating suction wheel 433. A driving gear 437 meshes with both the transmission gear 436 and the driven gear 435. A transmission shaft 438 is provided at the center of each of the two driving gears 437. One end of the transmission shaft 438 is rotatably connected to the side wall of the mounting frame 431, and the other end of the transmission shaft 438 is provided with a single-grooved pulley, which is connected to a double-grooved pulley via a belt. The rotating adsorption wheel 433 is connected to the transmission, and the other end of the rotating adsorption wheel 433 is provided with a discharge port. The rotating flushing wheel 432 can achieve multi-angle dynamic flushing through multiple flushing nozzles and its own rotation, avoiding the cleaning blind spots of traditional fixed-angle flushing. The rotating adsorption wheel 433 can avoid uneven cleaning caused by local blockage of the suction groove through the annular array suction groove and rotation switching. With the negative pressure adsorption of the suction pump 13, it can efficiently remove small and stubborn impurities in the pores of the filter plate 11. Moreover, the flushing and adsorption are carried out simultaneously through the drive gear 437, driven gear 435, transmission gear 436 and single groove wheel and double groove wheel transmission, without the need for other cleaning devices for secondary cleaning, which solves the problems of long backwashing time and incomplete cleaning in the existing system.

[0023] Furthermore, both the rotating flushing wheel 432 and the rotating adsorption wheel 433 are equipped with a sealed bearing 439 at one end. The rotating flushing wheel 432 and the rotating adsorption wheel 433 are rotatably connected to the side wall of the mounting frame 431 through the sealed bearing 439. The other end of the sealed bearing 439 is sealed with a flange mounting port 410. The sealed bearing 439 can effectively prevent water leakage in the flushing water path and air leakage in the adsorption air path, ensuring stable flushing water pressure and sufficient adsorption negative pressure, thus guaranteeing the cleaning effect. The flange mounting port 410 facilitates the disassembly, assembly, and maintenance of the rotating flushing wheel 432 and the rotating adsorption wheel 433, reducing the difficulty of device maintenance and extending the service life of the device.

[0024] Furthermore, one side of each of the two rotating adsorption wheels 433 is in contact with the surface of the filter press plate 11; the direct contact between the rotating adsorption wheels 433 and the surface of the filter press plate 11 allows the negative pressure adsorption to act more directly on the surface and pores of the filter press plate 11, which can more efficiently remove fine impurities embedded in the pores. Compared with the existing backwashing method that flushes water from the inside, this avoids the problem of small water flow and difficulty in removing impurities due to the small pores of the filter cloth, thus improving the cleaning effect on stubborn impurities.

[0025] Furthermore, the inner cavity of the mounting frame 431 is provided with multiple arc-shaped baffles, and the inner sidewalls of the multiple arc-shaped baffles are respectively in contact with the rotating flushing wheel 432 and the rotating suction wheel 433. The arc-shaped baffles play a positioning and stabilizing role for the rotating flushing wheel 432 and the rotating suction wheel 433, which can prevent them from shifting or shaking during high-speed rotation, and ensure that the flushing nozzle and the suction trough always maintain a stable working distance from the filter press plate 11, thus ensuring the stability of the cleaning process and the consistency of the cleaning effect.

[0026] Working principle: Washing of large particles on the surface of filter plate 11: Start the lifting drive 411 to push the lifting frame 412, the connection adjustment component 42 connected to the lifting frame 412, and the cleaning execution component 43 connected to the bottom to move up and down synchronously. Start the water pump 3 to deliver water through the hose to the inner cavity of the water supply pipe 425, and then through the water supply pipe 425 to the inner cavity of the main flushing nozzle group 434. When the water pressure is increased and the main flushing nozzle group 434 moves up and down, the water sprays out from the nozzle to flush the filter plate 11 on the surface of the filter plate 11, removing large particles of impurities attached to the surface of the filter plate 11, so as to prevent large particles from clogging the adsorption holes when the filter plate 11 is adsorbed in the future. Adsorption of fine impurities embedded in the pores on the surface of the filter plate 11: During the above operation, the rotary motor 426 is started synchronously. The power output shaft of the rotary motor 426 drives the double grooved wheel to rotate, thereby driving the two single grooved wheels, the transmission shaft 438 and the drive gear 437 connected to the double grooved wheel to rotate. The rotation of the drive gear 437 drives the two adjacent driven gears 435 and the transmission gear 436 to rotate. The driven gears 435 and the transmission gear 436 drive the adjacent rotating flushing wheel 432 and the rotating suction wheel 433 to rotate. When the rotating flushing wheel 432 is spraying water, the rotation allows the flushing nozzles on the rotating flushing wheel 432 to continuously change the water spray angle. Compared with the traditional single flushing method, the flushing and cleaning effect is more uniform and the flushing effect is improved. Next, the output end of the suction pump 13 is connected to the flange mounting port 410, which is connected to the rotating adsorption wheel 433. The adjustment driver 421 is then activated. As the two adjusting arms 422 at the bottom of the adjustment driver 421 approach each other, they drive the connecting rod 423, mounting base 424, mounting frame 431, and rotating adsorption wheel 433 towards the filter press plate 11. Once the rotating adsorption wheel 433 is in contact with the filter press plate 11, the suction pump 13 is activated. Simultaneously, the rotating adsorption wheel 433 is in contact with the surface of the filter press plate 11, and the lifting driver 411 drives the rotating adsorption wheel 433 to move up and down, thus adsorbing impurities onto the surface of the filter press plate 11. While the rotating adsorption wheel 433 adsorbs impurities, multiple suction troughs can be continuously switched to adsorb impurities onto the surface of the filter press plate 11 through rotation. Furthermore, the suction troughs are located on the filter membrane surface... When the roller slides, it can better adhere to the surface of the filter press plate 11. During the switching of multiple suction troughs, it can avoid the situation of poor uniformity of suction cleaning caused by local suction trough blockage. Compared with the traditional backwashing method, since the rotating suction wheel 433 directly adheres to the surface of the filter press plate 11, the cleaning effect is more direct. The negative pressure generated during suction removes particulate matter, which is more efficient and effective than flushing with increased water pressure from the inside. It also avoids the situation of poor cleaning effect of impurities in the pores of the filter press plate 11 when the pores are blocked by internal high-pressure flushing. The simultaneous flushing and suction means that after the filter press plate 11 is flushed and cleaned, the rotating suction wheel 433 can fully remove the fine impurities and moisture attached to the surface of the filter press plate 11, eliminating the need for subsequent cleaning and drying of water stains on the surface of the filter press plate 11, thus improving the cleaning efficiency.

[0027] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A raw material filtration device for the production of pyromellitic dianhydride, characterized in that, The filter press includes a filter press body (1), multiple filter plates (11) disposed at the filter pressing end of the filter press body (1), a filter press drive mechanism (12) connected to the side wall of the filter press body (1), and a device frame (2). A water pump (3) is installed at the top of the device frame (2), and two cleaning mechanisms (4) are provided in the inner cavity of the device frame (2). The cleaning mechanism (4) includes: A lifting drive assembly (41) is installed at the top of the device frame (2). One end of the lifting drive assembly (41) is provided with two connecting adjustment assemblies (42), and one end of each of the two connecting adjustment assemblies (42) is provided with a cleaning execution assembly (43). The cleaning execution assembly (43) includes a mounting frame (431). The inner cavity of the mounting frame (431) is rotatably provided with two rotating flushing wheels (432). One end of each of the two rotating flushing wheels (432) is connected to a water pump (3) through a hose. The inner cavity of the mounting frame (431) is also rotatably provided with two rotating adsorption wheels (433). One end of each of the two rotating adsorption wheels (433) is connected to an air suction pump (13) through a pipe. The air suction pump (13) is located at the top of the filter press drive mechanism (12). The rotating adsorption wheels (433) are connected to the rotating flushing wheels (432) in a transmission connection.

2. The raw material filtration device for the production of pyromellitic dianhydride according to claim 1, characterized in that, The lifting drive assembly (41) includes two lifting drivers (411). One end of each of the two lifting drivers (411) is connected to the top and bottom side walls of the inner cavity of the device frame (2), respectively. The other end of each of the two lifting drivers (411) is connected to a lifting frame (412). Positioning blocks (413) are provided on both sides of the lifting frame (412). A guide rod (414) slides through the center of the positioning block (413). One end of the guide rod (414) is connected to the inner side wall of the water pump (3), and the other end of the guide rod (414) is connected to the two end side walls of the filter press body (1).

3. The raw material filtration device for the production of pyromellitic dianhydride according to claim 1, characterized in that, The connection adjustment assembly (42) includes an adjustment driver (421), which is located at the bottom of the lifting frame (412). The bottom of the adjustment driver (421) is provided with two adjustment arms (422). The other end of the adjustment arm (422) is provided with a connecting rod (423). The other end of the connecting rod (423) is provided with a mounting seat (424). The mounting seat (424) is connected to the side wall of the mounting frame (431). A water supply pipe (425) is provided through the side wall of the mounting seat (424). The inner cavity of the mounting seat (424) is provided with a rotary motor (426). The power output end of the rotary motor (426) is provided with a double groove wheel.

4. The raw material filtration device for the production of pyromellitic dianhydride according to claim 3, characterized in that, The bottom end of the mounting frame (431) is provided with a main flushing nozzle assembly (434), which is provided with multiple nozzles arranged in an array. The input ends of the multiple nozzles are connected to the water supply pipe (425), and the other end of the water supply pipe (425) is connected to the output end of the water pump (3) through a hose.

5. The raw material filtration device for the production of pyromellitic dianhydride according to claim 4, characterized in that, Two of each of the rotating flushing wheel (432) and the rotating adsorption wheel (433) are provided. Multiple flushing nozzles are provided on the outer side of the two rotating flushing wheels (432). A driven gear (435) is provided at one end of the rotating flushing wheel (432). Multiple suction grooves arranged in a ring array are provided on the outer side walls of the two rotating suction wheels (433). One end of the rotating suction wheel (433) is provided with a transmission gear (436). The transmission gear (436) and the driven gear (435) are meshed together with a driving gear (437). The center of each of the two driving gears (437) is provided with a transmission shaft (438). One end of the transmission shaft (438) is rotatably connected to the side wall of the mounting frame (431). The other end of the transmission shaft (438) is provided with a single groove wheel. The single groove wheel is connected to the double groove wheel through a belt. The other end of the rotating suction wheel (433) is provided with a discharge port.

6. The raw material filtration device for the production of pyromellitic dianhydride according to claim 5, characterized in that, One end of the rotating flushing wheel (432) and the rotating adsorption wheel (433) is provided with a sealed bearing (439). The rotating flushing wheel (432) and the rotating adsorption wheel (433) are rotatably connected to the side wall of the mounting frame (431) through the sealed bearing (439). The other end of the sealed bearing (439) is sealed with a flange mounting port (410).

7. The raw material filtration device for the production of pyromellitic dianhydride according to claim 6, characterized in that, One side of each of the two rotating adsorption wheels (433) is in contact with the surface of the filter press plate (11).

8. The raw material filtration device for the production of pyromellitic dianhydride according to claim 7, characterized in that, The inner cavity of the mounting frame (431) is provided with multiple arc-shaped grooves, and the inner sidewalls of the multiple arc-shaped grooves are respectively attached to the rotating flushing wheel (432) and the rotating adsorption wheel (433).

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