A filter device

Abstract

The embodiment of the application provides a filtering device, which comprises a filtering container, a cavity is formed in the filtering container, the filtering container is provided with an inlet and an outlet, a filter screen is arranged in the cavity, the filter screen divides the cavity into an inner cavity and an outer cavity, the inlet is communicated with the inner cavity, the outlet is communicated with the outer cavity, a scraper is abutted with the filter screen, a driving device is connected with the scraper, the driving device is used for driving the scraper to move along the surface of the filter screen, and an ultrasonic vibration device is arranged in the cavity. Through the cooperation of the scraper and the ultrasonic vibration, the problem that the traditional single scraper cannot remove the blockage in the mesh is solved, the filtering period is significantly prolonged, the cleaning frequency is reduced, and the operation stability of the equipment is improved.

Description

Technical Field

[0001] This application relates to the field of slurry filtration, and more particularly to a filtration device. Background Technology

[0002] Existing filtration devices are pressure filtration systems. When the slurry contains many impurities and foreign objects, a high-pressure environment is installed within the device or scrapers are added to create a high-pressure environment, thereby improving the filtration efficiency. Alternatively, mechanical scrapers or backwashing can be used to remove the filter cake, further enhancing filtration efficiency. However, this method easily forms a dense filter cake layer on the inner surface of the filter screen and within the mesh openings. This causes subsequent slurry to pass through the screen, leading to clogging. Scrapers can only remove loose filter cake from the surface of the screen and are unable to penetrate deep into the mesh to remove embedded fine particles, resulting in gradual clogging and a continuous decrease in filtration throughput. Furthermore, after clogging occurs, the filter screen is typically removed for cleaning. However, due to the accumulation of clogging within the mesh openings, manual cleaning is often insufficient, and the clogging process accelerates during subsequent uses. Summary of the Invention

[0003] Firstly, a filtration device is proposed, comprising a filter container having a cavity formed within it, the filter container having an inlet and an outlet; a filter screen disposed within the cavity, the filter screen dividing the cavity into an inner cavity and an outer cavity, the inlet communicating with the inner cavity and the outlet communicating with the outer cavity; a scraper abutting against the filter screen; a driving device connected to the scraper, the driving device being used to drive the scraper to move along the surface of the filter screen; and an ultrasonic vibration device disposed within the cavity. The beneficial effects of the above solution are: through the cooperation of the scraper and the filter screen, and the synergistic effect of the ultrasonic vibration device, blockages on the surface of the filter screen can be effectively removed, improving filtration efficiency and extending the service life of the filter screen.

[0004] In conjunction with the first aspect above, in one possible implementation, the filtration device further includes a partition plate disposed inside the filtration container, dividing the filtration container into a first cavity and a second cavity. The partition plate has a through hole, the first cavity is connected to the inlet, the first cavity is connected to the inner cavity through the through hole, and the second cavity includes the hollow cavity.

[0005] In conjunction with the first aspect above, in one possible implementation, the filter device is provided with a carrier, the carrier is disposed on the inner wall of the cavity and fixedly connected to the inner wall, and the partition is disposed above the carrier.

[0006] In conjunction with the first aspect above, in one possible implementation, the partition and the carrier are fastened together by bolts.

[0007] In conjunction with the first aspect above, in one possible implementation, a sealing gasket is provided between the partition and the carrier.

[0008] In conjunction with the first aspect above, in one possible implementation, the partition is fixedly connected to the filter screen, and the fixing method is welding or bonding.

[0009] In conjunction with the first aspect above, in one possible implementation, the scraper is disposed in the inner cavity, and the ultrasonic vibration device is disposed in the outer cavity.

[0010] In conjunction with the first aspect above, in one possible implementation, the ultrasonic vibration device is an ultrasonic vibrating rod.

[0011] In conjunction with the first aspect above, in one possible implementation, the filter screen is a multi-layer sintered mesh.

[0012] In conjunction with the first aspect above, in one possible implementation, the filter screen is a three-layer sintered screen, the filter screen includes a filter screen distribution layer, a filter screen filtration layer, and a filter screen support layer, the filter screen distribution layer faces the inner cavity, the filter screen support layer faces the outer cavity, and the filter screen filtration layer is placed between the filter screen distribution layer and the filter screen support layer.

[0013] In conjunction with the first aspect above, in one possible implementation, the driving device is selected as a motor or a cylinder, and the scraper is connected to the drive shaft of the motor or the cylinder.

[0014] In conjunction with the first aspect above, in one possible implementation, the filter container is a cylindrical tank or a cylindrical material bucket. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A schematic diagram of a filtering device provided in an embodiment of this application;

[0017] Figure 2 This is a schematic diagram of a partition provided in an embodiment of this application.

[0018] Figure label:

[0019] 1-Inlet; 2-Outlet; 3-Filter screen; 4-Inner cavity; 5-Outer cavity; 6-Scraper; 7-Drive device; 8-Ultrasonic vibration device; 9-Baffle; 10-Cavity 1; 11-Bearing component; 12-Sealing gasket. Detailed Implementation

[0020] 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, and 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.

[0021] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0022] In the description of this application, 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," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] This application provides a filtration device, as shown in the figure. The filtration device includes: a filter container with a cavity formed inside, the filter container having an inlet 1 and an outlet 2; a filter screen 3 disposed in the cavity, the filter screen 3 dividing the cavity into an inner cavity 4 and an outer cavity 5, the inlet 1 connecting to the inner cavity 4, and the outlet 2 connecting to the outer cavity 5; a scraper 6 abutting against the filter screen 3; a driving device 7 connected to the scraper 6, the driving device 7 driving the scraper 6 to move along the surface of the filter screen 3; and an ultrasonic vibration device 8 disposed in the cavity. In the above embodiment, by designing the filter container as a closed cavity structure, the slurry enters the inner cavity 4 from the inlet 1, is filtered by the filter screen 3, and the clean liquid is discharged from the outer cavity 5 through the outlet 2, forming a radial filtration flow path from the inside to the outside. The scraper 6 rotates or reciprocates close to the surface of the filter screen 3, physically scraping away the filter cake layer formed on the surface and preventing it from accumulating and thickening. Simultaneously, the ultrasonic vibration device 8 continuously transmits high-frequency mechanical vibration energy to the filter screen 3. This energy penetrates the filter screen 3 matrix and acts on the inside of the mesh, causing the embedded fine particles and fibrous entanglements to loosen and fall off due to resonance, thus achieving dual cleaning of the surface and deep pores of the filter screen 3. This solution, through the synergistic mechanism of the scraper 6 and ultrasonic vibration, completely solves the problem that traditional single scraper 6 cannot remove blockages inside the mesh, significantly extending the filtration cycle, reducing the frequency of downtime for cleaning, and improving the stability of equipment operation.

[0025] In some embodiments, the filtration device further includes a partition 9 disposed within the filtration container, dividing the internal space of the filtration container into a first cavity 10 and a second cavity. The partition 9 has a through hole. The first cavity 10 connects to the inlet 1 and the second cavity 4 through the through hole. The second cavity includes the hollow cavity. The partition 9 has an annular or disc-shaped structure and is installed in the middle of the filtration container. The slurry to be filtered enters the first cavity 10 through the inlet, then enters the second cavity 4, is filtered by the filter screen 3, enters the third cavity 5, and finally exits through the fourth cavity 2. Therefore, the function of the partition 9 is to completely physically isolate the slurry inlet channel from the filtered outlet 2 channel, preventing unfiltered slurry from short-circuiting into the outlet 2 and ensuring that all slurry must be filtered by the filter screen 3 before being discharged. This structure effectively improves filtration accuracy, prevents impurities from penetrating, and reduces the fluctuation of impurity concentration at the outlet 2, ensuring the stability of downstream processes.

[0026] In some embodiments, the filtration device includes a support member 11, which is disposed on and fixedly connected to the inner wall of the cavity, and the partition 9 is disposed above the support member 11. The support member 11 is an annular metal flange structure, welded or bonded to the inner wall of the filter container, and its upper surface is a flat support surface for stably supporting the partition 9. This structure prevents the partition 9 from shifting or sinking under high-pressure slurry impact or vibration, ensuring the sealing and positioning accuracy between the partition 9 and the filter screen 3. Since the partition 9 is supported by the support member 11, the partition 9 does not need to be welded or bonded for fixation. When deep cleaning of the inside of the filter container is required, the partition 9 can be disassembled for convenient operation.

[0027] In some embodiments, the partition 9 and the support member 11 are fastened together by bolts. The bolts are made of stainless steel and are evenly distributed on the outer edge of the partition 9. The preload force ensures that the partition 9 and the support member 11 are tightly fitted together, forming a rigid connection. This connection method facilitates disassembly and maintenance, and at the same time resists fluid pulsation and vibration during equipment operation, preventing the partition 9 from loosening and causing seal failure.

[0028] In some embodiments, a sealing gasket 12 is provided between the partition 9 and the carrier 11. The sealing gasket 12 is made of corrosion-resistant and solvent-resistant fluororubber or silicone rubber, and its thickness can be selected as 2–5 mm, forming a reliable static seal after the bolts are tightened. This structure effectively prevents slurry leakage from the joint between the partition 9 and the carrier 11, facilitates complete physical isolation between the slurry inlet channel and the filtered outlet 2 channel, avoids unfiltered slurry short-circuiting into the outlet 2, avoids contamination of the outer cavity 5 or causing impurities in the outlet 2 liquid, ensures that all slurry must be filtered by the filter screen 3 before being discharged, and improves the overall sealing performance of the system. The sealing gasket 12 can be perforated to allow the bolts between the partition 9 and the carrier 11 to pass through, or the size of the sealing gasket 12 can be set appropriately to avoid the bolt tightening connection between the partition 9 and the carrier 11.

[0029] In some embodiments, the partition 9 is fixedly connected to the filter screen 3. The fixing method is welding or bonding, and is not limited to any particular connection method. The goal is to rigidly connect the partition 9 and the filter screen 3. The edge of the filter screen 3 is bonded to the upper surface of the partition 9 by laser welding or high-temperature epoxy adhesive, achieving a rigid integrated connection between the filter screen 3 and the detachable structure. This method prevents the filter screen 3 from shaking, curling, or tearing under high-speed scraping by the scraper 6 or ultrasonic vibration, significantly improving the service life and operational reliability of the filter screen 3. This connection method facilitates disassembly and maintenance. When deep cleaning of the inside of the filter container is required, the basic disassembly of the filter container can be completed by removing the partition 9, which is rigidly connected to the filter screen 3.

[0030] In some embodiments, the scraper 6 is disposed in the inner cavity 4, and the ultrasonic vibration device 8 is disposed in the outer cavity 5. The scraper 6 is located on the slurry feed side, directly contacting the high-concentration filter cake area, which facilitates timely removal of surface deposits; the ultrasonic vibration device 8 is installed on the post-filtration clean side, which can avoid interference between the ultrasonic vibration device 8 and the scraper 6 during reciprocating or rotating motion. At the same time, its vibration energy is conducted to the inner cavity 4 side through the filter screen 3 substrate, avoiding direct contact with the slurry and causing probe corrosion or contamination. Meanwhile, the filter screen 3 is used as a sound wave transmission medium to achieve efficient energy focusing on the mesh area, improving deep cleaning efficiency.

[0031] In some embodiments, the ultrasonic vibration device 8 is an ultrasonic vibrating rod. The ultrasonic vibrating rod is made of metal and is fixed to the side wall of the outer cavity 5 by a flange, with the probe end placed inside the outer cavity 5. This design allows ultrasonic energy to be directly coupled to the filter screen 3 structure, ensuring that micron-sized particles inside the mesh receive sufficient vibration energy to detach.

[0032] In some embodiments, filter screen 3 is selected as a multi-layer sintered mesh. The multi-layer sintered mesh is formed by high-temperature sintering of metal powder, with a porosity controlled at 30%~50% and a gradient pore size distribution, possessing high specific surface area and good permeability. Compared with traditional single-layer wedge mesh, its compressive strength is increased by 200%, and its fatigue life is extended by 5 times, making it suitable for long-term operation of high-viscosity, high-solids-content slurries.

[0033] In some embodiments, the filter 3 is a three-layer sintered mesh, comprising a filter distribution layer, a filter layer, and a filter support layer. The filter distribution layer faces the inner cavity 4, and the filter support layer faces the outer cavity 5. The filter layer is positioned between the filter distribution layer and the filter support layer. The filter distribution layer has a pore size of 50-100 μm and is used for initial interception of large particles and long strip-shaped foreign objects to prevent them from entering the core filtration area. The filter layer has a pore size of 5-20 μm and is a high-precision interception layer, achieving the retention of micron-level particles. The filter support layer has a pore size of 100-200 μm and a thickness of 0.8 mm, providing structural support to resist internal and external pressure differences (up to 0.6 MPa) and preventing the filter 3 from bulging and deforming. The three-layer structure is integrally formed through a hot isostatic pressing sintering process, with an interlayer bonding strength ≥15 MPa, eliminating the risk of delamination. This solution achieves a three-in-one approach of "pre-separation - fine filtration - strong support" through a functional layered design, significantly improving the interception efficiency of fibrous and strip-shaped impurities (such as carbon fibers and metal wires in battery slurry), with an interception rate of 99.2%, far exceeding the 85% of traditional single-layer mesh.

[0034] In some embodiments, the driving device 7 is selected as a motor or a cylinder, and the scraper 6 is connected to the transmission shaft of the motor or the cylinder. The driving device 7 is a servo motor with a rated power of 1.5 kW and a speed range of 0 - 60 rpm. It is connected to the rotating shaft of the scraper 6 through a coupling to achieve stepless speed regulation; or a double-acting cylinder with a stroke of 500 mm and a gas pressure of 0.4 - 0.6 MPa is adopted, and the scraper 6 is driven to perform a reciprocating linear motion through a connecting rod mechanism. The motor solution is suitable for continuous rotary clog clearing, and the cylinder solution is suitable for intermittent clog clearing. Both methods can achieve timed start / stop and fault self-diagnosis through the PLC control system. This solution adapts to different process requirements through diverse driving methods and improves the flexibility of the system.

[0035] In some embodiments, the filtering container is a cylindrical tank body or a cylindrical bucket. The cylindrical structure is convenient for processing and installation, has no internal corners, and is beneficial for cleaning; the wall thickness of the tank body is ≥ 6 mm, and the inner surface is mirror-polished to Ra ≤ 0.4 μm, meeting the food-grade and pharmaceutical-grade standards; a slag discharge port is provided at the bottom of the bucket for regularly discharging the accumulated dry slag to avoid secondary pollution. This solution improves manufacturing consistency and maintenance convenience through structural standardization.

[0036] The embodiment of the present application also provides a usage method of the filtering device. As shown in the figure, this method includes: starting the driving device 7 to make the scraper 6 rotate uniformly along the outer surface of the filter screen 3 at a speed of 10 - 30 rpm; simultaneously starting the ultrasonic vibration device 8 to output ultrasonic energy of 25 kHz and 0.5 W / cm²; waiting for the slurry to continuously flow into the inner cavity 4 from the inlet 1, and the clear liquid is discharged from the outlet 2 after being filtered by the filter screen 3; when the differential pressure sensor detects that the internal and external differential pressure exceeds the set threshold (0.3 MPa), the system automatically extends the ultrasonic vibration time or increases the rotation speed of the scraper 6 to achieve intelligent clog clearing; after the operation cycle ends, close the feed, empty the inner cavity 4, and perform cleaning. This solution realizes unattended continuous operation and reduces the frequency of manual intervention through automatic control and multi-parameter linkage.

[0037] The embodiment of the present application also provides a maintenance method of the filtering device, including: regularly disassembling the scraper 6 for wear inspection and replacing the scraper 6 with a wear amount exceeding​​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," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are 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.

[0039] In the description of this invention, it should be understood that the terms “comprising” and “having” as used herein, and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0040] Unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can be a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection 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. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A filtration device, characterized in that, include: A filter container having a cavity inside, the filter container having an inlet (1) and an outlet (2). The filter (3) is disposed in the cavity and divides the cavity into an inner cavity (4) and an outer cavity (5). The inlet (1) is connected to the inner cavity (4) and the outlet (2) is connected to the outer cavity (5). A scraper (6) abuts against the filter screen (3); A driving device (7) is connected to the scraper (6) and is used to drive the scraper (6) to move along the surface of the filter screen (3); An ultrasonic vibration device (8) is provided in the cavity.

2. The filtration device according to claim 1, characterized in that, The filter device also includes a partition (9), which is disposed inside the filter container and divides the internal space of the filter container into cavity one (10) and cavity two. The partition (9) is provided with a through hole. Cavity one (10) is connected to the inlet (1). Cavity one (10) is connected to the inner cavity (4) through the through hole. Cavity two includes the cavity.

3. The filtration device according to claim 2, characterized in that, The filter device is provided with a support member (11), which is located on the inner wall of the cavity and fixedly connected to the inner wall. The partition (9) is located above the support member (11).

4. The filtration device according to claim 3, characterized in that, The partition (9) and the support member (11) are fastened together by bolts.

5. The filtration device according to claim 4, characterized in that, A sealing gasket (12) is provided between the partition (9) and the support member (11).

6. The filtration device according to any one of claims 2-5, characterized in that, The partition (9) is fixedly connected to the filter screen (3), and the fixing method is welding or bonding.

7. The filtration device according to claim 1, characterized in that, The scraper (6) is located in the inner cavity (4), and the ultrasonic vibration device (8) is located in the outer cavity (5).

8. The filtration device according to claim 1 or claim 7, characterized in that, The ultrasonic vibration device (8) is an ultrasonic vibrating rod.

9. The filtration device according to any one of claims 1-8, characterized in that, The filter screen (3) is a multi-layer sintered mesh.

10. The filtration device according to claim 9, characterized in that, The filter screen (3) is a three-layer sintered screen. The filter screen (3) includes a filter screen distribution layer, a filter screen filtration layer, and a filter screen support layer. The filter screen distribution layer faces the inner cavity (4), the filter screen support layer faces the outer cavity (5), and the filter screen filtration layer is placed between the filter screen distribution layer and the filter screen support layer.

11. The filtration device according to claim 1, characterized in that, The drive device (7) is selected from motors or cylinders, and the scraper (6) is connected to the drive shaft of the motor or the cylinder.

12. The filtration device according to any one of claims 1-11, characterized in that, The filter container is a cylindrical tank or a cylindrical material bucket.

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