Slurry purifying and filtering device and system

Abstract

The invention discloses a slurry purifying and filtering device and system.The liquid inlet end and the liquid outlet end of the filtering device are connected with a first two-way fluid driving unit and a second two-way fluid driving unit respectively, the filtering device comprises a thickening body, supporting nets, filtering membranes, convex edges and a cylinder, and the multiple layers of supporting nets and filtering membranes are arranged in a space defined by the thickening body, the convex edges and the cylinder; one end of the cylinder is open and fixedly connected with the convex edge in a threaded mode, the convex edge is connected with the thickened body, the supporting net is connected with the convex edge and divides a cavity formed by the thickened body and the cylinder into an inner cavity and an outer cavity, a liquid flow channel is formed in the thickened body and connected with the inner cavity, and an anti-blocking gap is reserved. The filtering system comprises the filtering device, a bidirectional fluid driving module and an ultrasonic enhanced backwashing module. Through the multi-layer nested structure and standardized interface design of the quick-release filtering functional component, quick switching and free matching of the thickness degree of the filter screen are realized, and the filter screen can be flexibly connected in series, is adaptive to purification scenes of different working conditions and is high in purification precision.

Description

A slurry purification and filtration device and system Technical Field

[0001] This invention pertains to filtration devices and systems, specifically a slurry purification filtration device and system. Background Technology

[0002] In numerous fields such as industrial production, biopharmaceutical preparation, and new material synthesis, the purification and filtration of slurries is a crucial step in ensuring product quality and production continuity. As industries increasingly demand higher purification precision, production efficiency, and ease of equipment maintenance, traditional slurry filtration devices are struggling to meet diverse application needs. Especially in scenarios requiring gradient purification or high-volume filtration, achieving rapid membrane replacement, efficient backwashing, and flexible device expansion have become core issues urgently needing resolution in the field of slurry filtration technology.

[0003] Existing slurry filtration devices mostly employ fixed-installation membrane assemblies. Replacing the membrane requires disassembling the entire chamber, which is not only cumbersome and time-consuming but also prone to slurry leakage due to improper disassembly and reassembly of seals, affecting production continuity. Furthermore, the membrane pore sizes are mostly fixed, making it difficult to flexibly adjust to the purification requirements of different slurries, resulting in poor adaptability. In addition, traditional backwashing methods rely on reverse fluid impact, which has limited effectiveness in cleaning stubborn impurities adhering to the membrane surface, easily leading to membrane clogging, reduced filtration efficiency, shortened membrane lifespan, and increased maintenance costs.

[0004] In multi-level gradient purification scenarios, even if some devices in existing filtration systems support series connection, there are still problems such as poor coordination between the various levels of devices and difficulty in ensuring the accuracy of gradient purification. Furthermore, the multi-level backwashing process is prone to mutual interference and cannot achieve independent or synchronous cleaning, which further limits the applicability and operational stability of the system. Summary of the Invention

[0005] Purpose of the invention: In order to overcome the shortcomings of the existing technology, the purpose of this invention is to provide an expandable, tandem, quick-release slurry purification and filtration device, and to provide a slurry purification and filtration system with wide applicability and good purification effect.

[0006] Technical Solution: The present invention provides a slurry purification and filtration device, comprising a filtration device. The inlet and outlet ends of the filtration device are respectively connected to a first bidirectional fluid drive unit and a second bidirectional fluid drive unit. The filtration device includes a thickened body, a support mesh, a filter membrane, a convex edge, and a cylinder. Several layers of support mesh and filter membrane are arranged within the space enclosed by the thickened body, the convex edge, and the cylinder. One end of the cylinder is open and is threadedly fixedly connected to the convex edge. The convex edge is connected to the thickened body. The support mesh is connected to the convex edge and divides the cavity formed by the thickened body and the cylinder into an inner cavity and an outer cavity. A liquid flow channel is provided inside the thickened body and is connected to the inner cavity, with a reserved anti-clogging gap.

[0007] Furthermore, an upper standardized interface is provided at the point where the thickened body extends out of the liquid flow channel, and a lower standardized interface is provided on the surface of the cylinder to communicate with the outer cavity. The upper and lower standardized interfaces are used to realize the series or parallel connection of at least two filter devices, and the filter devices are reversed during backwashing.

[0008] Furthermore, the lower standardized interface is connected to the first fluid switching component through pipe one, and a first bidirectional fluid drive unit is installed on pipe one.

[0009] Furthermore, the upper standardized interface is connected to the second fluid switching component through pipe two, and a second bidirectional fluid drive unit is installed on pipe two.

[0010] Furthermore, an ultrasonic-enhanced backwashing device is installed at the bottom of the cylinder.

[0011] Furthermore, a channel is provided at the bottom of the bolded part for liquid collection and extraction.

[0012] Furthermore, the pore size of the filter membrane is 0.1~100 μm, and the filter membrane is disposed on the surface of the support mesh. Preferably, when there are two or more support meshes and filter membranes, the pore size of the filter membranes gradually decreases from the outside to the inside, which is beneficial for staged interception. First, the outer layer of large-pore filter membrane coarsely filters out larger particulate impurities in the slurry, and then the inner layer of small-pore filter membrane finely filters out fine impurities. This not only improves the accuracy of the final purified solution, but also effectively reduces the clogging rate of the inner small-pore filter membrane, extends the overall service life of the filter membrane, and reduces the frequency of backwashing and energy consumption. When there are two or more slurry purification filtration devices, the pore size of the filter screens in each stage decreases progressively along the slurry flow direction.

[0013] Furthermore, the convex edge is provided with a fitting groove for the support mesh to be snapped in.

[0014] Furthermore, a sealing groove is provided on the convex edge.

[0015] The present invention provides a slurry purification and filtration system, comprising the above-mentioned slurry purification and filtration device, a bidirectional fluid drive module, and an ultrasonic-enhanced backwashing module;

[0016] The bidirectional fluid drive module is used to drive the industrial desulfurization slurry to flow forward to the quick-release filter device to achieve filtration, or to drive the backwash liquid to penetrate the filter device in the reverse direction to achieve backwashing.

[0017] The ultrasonic-enhanced backwashing module is used to remove desulfurization slurry impurities adhering to the support mesh and filter membrane surface through ultrasonic effect.

[0018] Working principle: The filtration process is as follows: Industrial desulfurization slurry enters the outer cavity through the standardized interface on the lower side of the device, accumulates upward along the inner wall of the outer cavity, fills the outer cavity, and after fully contacting the quick-release filter functional components (support mesh, filter membrane), the slurry permeates the filter mesh to complete the filtration, and the purified liquid enters the inner cavity.

[0019] The purified liquid is drawn downwards into the bottom area of ​​the cavity by gravity, flows into the pre-set channel at the bottom of the cavity, and then immediately enters the liquid flow channel, flows upwards along the liquid flow channel, and is finally drawn out from the liquid outlet at the top of the device.

[0020] During backwashing, the filter device is inverted, and after the fluid path is switched, the backwash liquid enters from the upper standardized interface, flows upward along the liquid flow channel into the channel, fills the inner cavity, and then penetrates the filter components (support screen and filter membrane) in the reverse direction. At the same time, the ultrasonic transducer of the ultrasonic-enhanced backwashing device is activated synchronously, and impurities on the surface of the filter screen are stripped off through the cavitation effect. The impurities enter the outer cavity with the backwash liquid and are finally discharged from the drain port of the outer cavity.

[0021] When the filtration devices are connected in series, the top outlet (upper standardized interface) of the pre-stage device is connected to the lower inlet (lower standardized interface) of the subsequent device, continuing the process of "upward filtration in the outer cavity → bottom accumulation in the inner cavity → liquid guiding in the channel → extraction from the outlet", thereby improving the purification accuracy step by step. When performing backwashing, a single-stage independent backwash only requires switching the device to the opposite path and inverting the filtration device to ensure that the backwash liquid fills the entire space, achieving a thorough and dead-angle-free backwash. For multi-stage synchronous backwashing, multiple sets of devices are switched to the opposite path simultaneously.

[0022] Beneficial effects: Compared with the prior art, the present invention has the following significant features:

[0023] 1. Through the multi-layer nested structure and standardized interface design of the quick-release filter functional components, the filter screen coarseness can be quickly switched and freely matched, and different specifications of filter devices can be flexibly connected in series to adapt to different purification scenarios and achieve high purification accuracy.

[0024] 2. Through the structural design of "slurry entering the outer cavity and then filtering into the inner cavity", the contact area between the filtrate and the filter membrane is increased. While ensuring high filtration accuracy, the filtration speed and output are greatly improved, achieving a highly efficient purification effect.

[0025] 3. By using a backwashing process that is the opposite of the filtration path, combined with the ultrasonic cavitation effect, the filter screen impurities are completely removed, resulting in a cleaner rinse and ensuring that the device can be used continuously and stably for a long time. Attached Figure Description

[0026] Figure 1 is a schematic diagram of the structure of the present invention;

[0027] Figure 2 is an exploded view of the filtration device 1 of the present invention;

[0028] Figure 3 is a bottom view of the bolded body 101 of the present invention;

[0029] Figure 4 is a top view of the cylinder 105 of the present invention;

[0030] Figure 5 is a schematic diagram of the structure of Embodiment 1 of the present invention in the backwashing process;

[0031] Figure 6 is a structural schematic diagram of Embodiment 2 of the present invention;

[0032] Figure 7 is a structural schematic diagram of Embodiment 3 of the present invention. Detailed Implementation

[0033] Example 1

[0034] As shown in Figures 1 and 2, the filtration device 1 includes a thickened body 101, a support mesh 102, a filter membrane 103, a raised edge 104, and a cylinder 105. The raised edge 104 is fixedly connected to the thickened body 101. A cylindrical support mesh 102 is provided within the space enclosed by the thickened body 101, the raised edge 104, and the cylinder 105. The thickened structure 101 occupies space in the inner cavity 106 to reduce liquid retention. One end of the support mesh 102 is nested with the raised edge 104, and the other end is nested with the bottom of the cylinder 105. The outer surface of the support mesh 102 is covered with a filter membrane 103, the pore size of which is 0.1~100 μm. The rigid support mesh 102 and the filter membrane 103 together form a filtration functional component. The rigid support mesh 102 is a topless and bottomless columnar structure with a mesh structure on its surface, which is used to ensure the flowability of industrial desulfurization slurry and provide support strength for the filter membrane 103. The support mesh 102 divides the cavity formed by the thickened body 101, the raised edge 104, and the cylinder 105 into an inner cavity 106 and an outer cavity 107, thereby trapping impurities in the slurry. The support mesh 102 is preferably made of one of the following materials: 304 stainless steel, 316L stainless steel, polypropylene (PP), or polyetheretherketone (PEEK). Specifically, the 304 / 316L stainless steel support mesh 102 has a tensile strength ≥500MPa and a yield strength ≥205MPa; the polypropylene (PP) support mesh 102 has a breaking strength ≥16N / 25mm and an operating temperature not exceeding 85℃; the polyetheretherketone (PEEK) support mesh 102 can withstand high temperatures ≤260℃ and highly corrosive environments with pH 1~14. The support mesh 102 has a thickness of 1.0~2.0mm and a mesh size of 3~6mm. It does not undergo plastic deformation under a working pressure difference of 0.5MPa, providing stable support for the filter membrane and preventing damage or blockage due to excessive pressure. One end of the cylinder 105 is open, and its top outer surface is threadedly fixed to the inner surface of the protruding edge 104. A liquid flow channel 108 is provided inside the thickened body 101, and the liquid flow channel 108 is connected to the inner cavity 106.

[0035] A standardized upper interface 4 is provided at the point where the bolded body 101 extends out of the liquid flow channel 108. A standardized lower interface 5, communicating with the outer cavity 107, is provided near the bottom of the surface of the cylinder 105. This is a dedicated channel for the slurry to be treated to enter the outer cavity 107. The standardized lower interface 5 is connected to the first fluid switching component 7 via a pipe 1 6. A first bidirectional fluid drive unit 2 is provided on the pipe 1 6. The standardized upper interface 4 is connected to the second fluid switching component 9 via a pipe 2 8. A second bidirectional fluid drive unit 3 is provided on the pipe 2 8. The first fluid switching component 7 is connected to the slurry storage unit 11 for the forward filtration process and the waste liquid storage unit 12 for the reverse rinsing process. The second fluid switching component 9 is connected to the purified filtrate storage unit 13 for the forward filtration process and the rinsing liquid storage unit 14 for the reverse rinsing process.

[0036] An ultrasonic-enhanced backwashing device 10 is installed at the bottom of the cylinder 105. It is activated synchronously with the backwashing path to assist in removing impurities from the surfaces of the support mesh 102 and the filter membrane 103, achieving rapid reverse ultrasonic rinsing. The ultrasonic generating unit of the ultrasonic-enhanced backwashing device 10 is an ultrasonic transducer 1001, located on the outer side of the bottom outer shell of the cylinder 105, distributed circumferentially or evenly. The vibration of the ultrasonic transducer 1001 is transmitted through the chamber structure to the bottom area of ​​the cylinder 105 and diffuses throughout the support mesh 102 and the filter membrane 103, forming full ultrasonic coverage of the support mesh 102 and the filter membrane 103, ensuring no cleaning dead zones. The ultrasonic enhanced backwashing device 10 integrates an ultrasonic transducer 1001 (PZT ultrasonic vibrating plate) and a peristaltic pump. The ultrasonic transducer 1001 has a working frequency of 20-40kHz, a power of 50W, a voltage of 12V, a flow rate of 500-600ml per minute, and the BP600 peristaltic pump is connected to the inlet, outlet, cleaning liquid source, and waste liquid collection pipeline of each filter unit through pipelines. The peristaltic pump can be adjusted to forward and reverse.

[0037] The first bidirectional fluid drive unit 2 and the second bidirectional fluid drive unit 3 are high-precision pumps. The high-precision pumps and the fluid path switching component are linked through the same controller to achieve synchronous response of fluid path switching and driving direction, ensuring the rapid filtration, purification and backwashing efficiency of industrial desulfurization slurry.

[0038] As shown in Figure 3, the protruding edge 104 is provided with a support mesh 102 at the top for snapping, an annular fitting groove 110, and a sealing groove 111. The sealing groove 111, through its adapting structure, completes the sealing assembly between the protruding edge 104 on the upper part of the thickened body 101 and the lower part of the cylinder 105, effectively preventing leakage of slurry at the assembly gap. A channel 109 is provided at the bottom of the thickened body 101 for liquid collection and extraction, ensuring that the backwashing fluid enters the inner cavity evenly and improving the comprehensiveness of backwashing. The liquid flow channel 108 is connected to the channel 109, and the channel 109 is connected to the inner cavity 106. In the filtration process, the purified liquid filtered by the filter membrane 103 gathers at the bottom of the chamber and flows quickly into the liquid flow channel 108 through the channel 109. Combined with the space occupied by the thickened body 101 in the inner cavity 106, the amount of purified liquid retained in the inner cavity 106 is reduced, further improving the liquid output efficiency and reducing the risk of secondary pollution caused by liquid residue.

[0039] As shown in Figure 4, the inner bottom surface of the cylinder 105 is provided with a support mesh 102 for snapping and an annular groove 112, which corresponds vertically to the fitting groove 110. The outer surface of the cylinder 105 near the bottom is provided with symmetrical fixing structures 15 for firmly fixing the entire filter device 1 in the working area.

[0040] During assembly, the top of the filter assembly (support mesh 102, filter membrane 103) is first embedded into the fitting groove 110, and its bottom is embedded into the slot 112, achieving precise positioning and stable fixation of the support mesh 102. Then, the bottom mating surface of the thickened body 101 is fitted with the top mating surface of the cylinder 105, and the sealing assembly of the two is completed through the matching structure of the sealing groove 111, effectively preventing slurry leakage at the assembly gap. The quick-release filter assembly can be removed or installed by opening the protruding edge 104, completing the disassembly and replacement of the support mesh 102 and the filter membrane 103.

[0041] In the forward filtration process, the industrial desulfurization slurry to be treated is stored in the slurry storage unit 11. Guided by the first fluid switching component 7 and pushed by the first bidirectional fluid drive unit 2, it enters the outer cavity 107 through the pipe 6 connected to the lower standardized interface 5. After the slurry flows from bottom to top along the inner wall of the outer cavity 107 and fills the outer cavity 107, it gradually permeates the filter membrane 103 and the support mesh 102. Impurities are intercepted by the filter membrane, and the purified slurry enters the inner cavity 106. Since the thickened body 101 occupies most of the space in the inner cavity 106, only a small amount of purified liquid remains and is collected to the bottom of the cavity by gravity, entering the liquid flow channel 108 through the channel 109. Finally, the purified liquid is transported to the purified filtrate storage unit 13 through the pipe 8 connected to the upper standardized interface 4, driven by the second bidirectional fluid drive unit 3, and guided by the fluid path switching component 42, completing the purification treatment of the slurry.

[0042] As shown in Figure 5, in the backwashing process, the filter device 1 is inverted. The rinsing liquid is stored in the rinsing liquid storage unit 14 of the backwashing process. Guided by the second fluid switching component 9, it is pushed by the second bidirectional fluid drive unit 3 and enters the liquid flow channel 108 through the pipe 8 connected to the upper standardized interface 4. The rinsing liquid flows upward along the liquid flow channel 108, enters the inner cavity 106 through the channel 109, and penetrates the filter membrane 103 and the support net 102 in reverse to enter the outer cavity 107. At the same time, the ultrasonic enhanced backwashing device 10 is activated. The ultrasonic enhanced backwashing device 10 includes ultrasonic transducers 1001 (which can be expanded to 5n, where n is a positive integer), which generate a cavitation effect and efficiently remove impurities attached to the surface of the filter membrane 103. The rinsing liquid carrying impurities is guided by the first bidirectional fluid drive unit 2 through the pipe 6 connected to the lower standardized interface 5 to the waste liquid storage unit 12 of the backwashing process, completing the cleaning and maintenance of the filter membrane 103 and the filter device 1.

[0043] Example 2

[0044] As shown in Figure 6, the remaining structure of this embodiment is the same as that of Embodiment 1, except that the filtration component adopts a double-layer structure design, namely, two spaced-apart support nets 102 and two filter membranes 103. The two filter membranes 103 respectively cover the support nets 102, and there are two fitting grooves 110 on the protruding edge 104. The number of slots 112 at the bottom of the cylinder 105 is also increased to two. The pore size of the filter membranes 103 decreases progressively along the slurry flow direction. The area between the two support nets 102 is a buffer area used to disperse the slurry flow rate and prevent filter membrane clogging caused by the concentrated accumulation of impurities.

[0045] In the filtration process, after the slurry enters the device, it first contacts the outer filter membrane 103 (with a relatively large pore size of 3μm), which traps large particulate impurities. After being buffered by the buffer zone 16, the slurry then contacts the inner filter membrane 103 (with a relatively small pore size of 0.45μm), trapping small particulate impurities. Through the design of "gradually decreasing filter membrane 103 pore size + buffering and guiding," the overall filtration accuracy of the device is improved, and the risk of clogging of a single filter membrane 103 is mitigated, achieving efficient and stable purification of the slurry.

[0046] In the backwashing process, the filter device 1 is inverted, and the remaining steps are the same as in Example 1.

[0047] Example 3

[0048] As shown in Figure 7, the rest of the structure in this embodiment is the same as in Embodiment 1, except that there are two filter devices 1 connected in series. The one on the left is a single-layer filter device 1 (coarse filtration unit) with a filter membrane 103 having a pore size of 25.4 μm. The one on the right is a double-layer filter device 1 (fine filtration unit) with filter membrane 103 having pore sizes of 3 μm and 0.45 μm respectively, depending on their distance from the center of the filter device 1. The lower standardized interface 5 of the left filter device 1 is connected to pipe 6, and the upper standardized interface 4 of the left filter device 1 is connected to the lower standardized interface 5 of the right filter device 1 via pipe 17. The upper standardized interface 4 of the right filter device 1 is connected to the second fluid switching component 9 via pipe 8. Both filter devices 1 have ultrasonically enhanced backwashing devices 10 at their bottom for independent cleaning and maintenance. The chamber of filter device 1 is an open cylindrical structure integrally formed from 6061 aluminum alloy. The bottom and top of the inner side of the chamber are machined with interference fit positioning grooves, in which a 1000-mesh stainless steel metal filter membrane 103 is fitted. This filter membrane 103 can withstand a pressure of 0.6 MPa and is used to remove particulate impurities with a diameter ≥15 μm from the desulfurization slurry. The chamber structure of the fine filtration unit is the same as that of the coarse filtration unit. The filter membranes 103 fitted in its positioning grooves are a 0.8 μm polytetrafluoroethylene (PTFE) membrane and a 0.45 μm PTFE membrane arranged in series. The PTFE membrane has anti-fouling properties, and the two work together to achieve the retention of particles with a diameter ≥0.45 μm.

[0049] In the series filtration process, the slurry to be treated is pushed by the first bidirectional fluid drive unit 2 and first enters the single-layer filter device 1 on the left to complete the preliminary coarse filtration of large particulate impurities. The coarsely filtered slurry is then transported to the double-layer filter device 1 on the right through pipe 3 17, where it undergoes fine filtration of small particulate impurities through its progressively decreasing filter membranes 103. Finally, the purified slurry is output through the standardized interface 4 to the purified filtrate storage unit 13 of the forward filtration process. During this process, the processing flow rate of the device is maintained at 10-20 L / h, and the filtration efficiency is not less than 99%.

[0050] After collecting up to 300ml of filtrate, backwashing is initiated. During the backwashing process, both filter devices 1 are inverted. The rinsing solution is stored in the rinsing solution storage unit 14 of the backwashing process. Guided by the second fluid switching component 9, it is pushed by the second bidirectional fluid drive unit 3 and enters the liquid flow channel 108 of the right filter device 1 through the pipe 2 8 connected to the upper standardized interface 4. The rinsing solution flows upward along the liquid flow channel 108, enters the inner cavity 106 through the channel 109, and penetrates the filter membrane 103 and the support net 102 in reverse to enter the outer cavity 107. At the same time, the ultrasonic enhanced backwashing device 10 is activated. The ultrasonic enhanced backwashing device 10 includes ultrasonic transducers 1001 (which can be expanded to 5n, where n is a positive integer) to generate a cavitation effect, which efficiently removes impurities attached to the surface of the filter membrane 103. The rinsing fluid carrying impurities flows into the liquid channel 108 of the left-hand filter device 1 through the lower standardized interface 5. The rinsing fluid flows upward along the liquid channel 108, enters the inner cavity 106 through the channel 109, and then penetrates the filter membrane 103 and the support mesh 102 in reverse to enter the outer cavity 107. Next, it is guided by the first bidirectional fluid drive unit 2 through the pipe 6 to the waste liquid storage unit 12 of the reverse rinsing process, completing the cleaning and maintenance of the filter membrane 103 and the filter device 1. After cleaning, the flux recovery rate of the filter membrane 103 of each unit is not less than 95%, and under normal use and regular cleaning conditions, the service life of the filter membrane used in this device is not less than 3 months.

[0051] Example 4

[0052] The slurry purification and filtration system includes the slurry purification and filtration device of Example 1, a bidirectional fluid drive module, and an ultrasonic-enhanced backwashing module;

[0053] The bidirectional fluid drive module includes at least one drive unit connected in series with the liquid inlet channel or the liquid outlet / backwash channel. It is used to drive the industrial desulfurization slurry to flow forward to the quick-release filter device 1 to achieve filtration, or to drive the backwash liquid to penetrate the filter device 1 in the reverse direction to achieve backwashing.

[0054] The ultrasonic-enhanced backwashing module includes at least one set of ultrasonic generating units (ultrasonic transducers 1001) for removing desulfurization slurry impurities attached to the surface of the support mesh 102 and filter membrane 103 through ultrasonic effect.

[0055] The fluid path switching component works in conjunction with the first bidirectional fluid drive unit 2 and the second bidirectional fluid drive unit 3 to selectively guide the filtration path of the industrial desulfurization slurry or the backwashing path of the backwashing liquid. The filtration path is: industrial desulfurization slurry to be filtered → pipe 1 6 → outer cavity 107 → quick-release filter functional component (support mesh 102, filter membrane 103) → inner cavity 106 → pipe 2 8; the backwashing path is: backwashing liquid → pipe 2 8 → inner cavity 106 → quick-release filter functional component → outer cavity 107 → pipe 1 6.

[0056] When the various filtration devices 1 are connected in series, the number of series stages is n, where n≥2. In two adjacent filtration devices 1, the upper standardized interface 4 of the preceding stage device is connected to the lower standardized interface 5 of the following stage device 1 through a pipe, realizing fluid communication between the liquid outlet / backwashing channel of the preceding stage device and the liquid inlet channel of the following stage device. Along the flow direction of the industrial desulfurization slurry, the pore sizes of the filter membrane 103 and support mesh 102 of the quick-release filtration functional components of each stage filtration device 1 decrease in a gradient manner, realizing gradient purification from "coarse filtration to fine filtration".

[0057] When the various levels of filtration devices 1 are connected in parallel, the lower standardized interfaces 5 of all devices are connected to the inlet main pipe through the same connecting channel, and the upper standardized interfaces of all devices are connected to the outlet main pipe through the same connecting channel, so as to realize the diversion and synchronous filtration of industrial desulfurization slurry.

[0058] When performing backwashing, each stage of the filter device 1 can be selected for single-stage independent cleaning or multi-stage synchronous cleaning.

[0059] During single-stage independent cleaning, the fluid path switching component of the corresponding filter device 1 is used to switch to the backwash path, and the ultrasonic enhanced backwash module of the device is started simultaneously.

[0060] During multi-stage synchronous cleaning, the fluid path switching components of all filter devices 1 to be cleaned are switched to the backwash path simultaneously, and the ultrasonic enhanced backwash module of the corresponding device is started simultaneously.

[0061] During backwashing, the filter devices that are not involved in the cleaning process can maintain the filtration path open, ensuring the continuous operation of the system.

Claims

1. A slurry purification and filtration device, characterized in that: The filter includes a filter device (1), the inlet and outlet of which are connected to a first bidirectional fluid drive unit (2) and a second bidirectional fluid drive unit (3), respectively. The filter device (1) includes a thickened body (101), a support mesh (102), a filter membrane (103), a protruding edge (104), and a cylinder (105). Several layers of support mesh (102) and filter membrane are arranged in the space enclosed by the thickened body (101), the protruding edge (104), and the cylinder (105). (103) One end of the cylinder (105) is open and is threadedly fixed to the protruding edge (104). The protruding edge (104) is connected to the thickened body (101). The support mesh (102) is connected to the protruding edge (104) and divides the cavity formed by the thickened body (101) and the cylinder (105) into an inner cavity (106) and an outer cavity (107). A liquid flow channel (108) is provided inside the thickened body (101). The liquid flow channel (108) is connected to the inner cavity (106).

2. The slurry purification and filtration device according to claim 1, characterized in that: The thickened body (101) is provided with an upper standardized interface (4) at the liquid flow channel (108), and the surface of the cylinder (105) is provided with a lower standardized interface (5) that communicates with the outer cavity (107). The upper standardized interface (4) and the lower standardized interface (5) are used to realize the series or parallel connection of at least two of the filter devices (1). The filter devices (1) are reversed during backwashing.

3. The slurry purification and filtration device according to claim 2, characterized in that: The lower standardized interface (5) is connected to the first fluid switching component (7) through the first pipe (6), and the first bidirectional fluid drive unit (2) is provided on the first pipe (6).

4. The slurry purification and filtration device according to claim 2, characterized in that: The upper standardized interface (4) is connected to the second fluid switching component (9) through the second pipe (8), and the second bidirectional fluid drive unit (3) is provided on the second pipe (8).

5. The slurry purification and filtration device according to claim 1, characterized in that: An ultrasonic-enhanced backwashing device (10) is provided at the bottom of the cylinder (105).

6. The slurry purification and filtration device according to claim 1, characterized in that: The bottom of the bold body (101) is provided with a channel (109).

7. The slurry purification and filtration device according to claim 1, characterized in that: The filter membrane (103) has a pore size of 0.1~100 μm and is disposed on the surface of the support mesh (102).

8. The slurry purification and filtration device according to claim 1, characterized in that: The protruding edge (104) is provided with a fitting groove (110) for engaging the support mesh (102).

9. The slurry purification and filtration device according to claim 1, characterized in that: A sealing groove (111) is provided on the convex edge (104).

10. A slurry purification and filtration system, characterized in that: The device includes the slurry purification and filtration device, the bidirectional fluid drive module, and the ultrasonic-enhanced backwashing module as described in any one of claims 1-9; the bidirectional fluid drive module is used to drive the industrial desulfurization slurry to flow forward to the quick-release filter device (1) to achieve filtration, or to drive the backwash liquid to penetrate the filter device (1) in the reverse direction to achieve backwashing; the ultrasonic-enhanced backwashing module is used to remove the desulfurization slurry impurities attached to the surface of the support mesh (102) and the filter membrane (103) through the ultrasonic effect.

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