Anti-deposition filter and filtering method thereof

Abstract

The invention relates to the technical field of filtering equipment, and discloses an anti-deposition filter and a filtering method thereof.The anti-deposition filter comprises a barrel body, a filter bag part and a bag fixing part, the bag fixing part is arranged in the barrel body, the barrel body is divided into a filtrate cavity and a deposition cavity through the bag fixing part, and the filter bag part is locked in the barrel body; the filter bag piece is arranged in the filtrate cavity, and an opening of the filter bag piece is connected with the precipitation cavity; the barrel body is provided with a liquid inlet and a liquid outlet, and the liquid outlet is formed in the end, away from the liquid inlet, of the barrel body and connected with the filtrate cavity; the bottom-in and top-out flow channel design is adopted, liquid flows through the filter bag piece from bottom to top, flowing scouring force enables the liquid to be kept in a turbulent flow state, and fine particles are prevented from rapidly forming a filter cake; meanwhile, large particles settle into the settling cavity under the action of gravity, deposition and blockage are reduced fundamentally, the barrel body and components in contact with liquid are made of homo-polypropylene materials, the homo-polypropylene materials have excellent strong acid corrosion resistance and high heat resistance, and the service life of equipment can be prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of filtering equipment, in particular to an anti-accumulation filter and a filtering method thereof, and is especially suitable for solid-liquid separation operation of strong acid medium. BACKGROUND

[0002] In the production process of chemical industry, electroplating, metallurgy and other industries, it is often necessary to filter strong acid medium such as hydrochloric acid and sulfuric acid to remove solid particle impurities and ensure the normal operation of subsequent processes. The existing filtering equipment has the following technical defects when processing strong acid medium: Traditional filters mostly adopt an up-in and down-out flow channel design, and the liquid flows through the filter material from top to bottom. The solid particles are easily accumulated on the surface of the filter material to form a dense filter cake, which leads to a sharp rise in filtration resistance, frequent shutdown for cleaning, and affects the production efficiency. The barrel and internal components of some filtering equipment are made of ordinary metal or plastic materials, which are easily corroded and damaged under the long-term erosion of strong acid medium, shortening the service life of the equipment. The sealing structure design of the cavity separation and component connection of the filter is unreasonable, which is easy to cause acid liquid leakage, pollutes the environment, and has safety hazards. Manual periodic blowdown is mostly used, which cannot intelligently adjust the blowdown time according to the filtering conditions, leading to long-term accumulation of impurities at the bottom, further aggravating the blockage, and manual operation has high labor intensity and low safety. Therefore, an anti-accumulation filter and a filtering method thereof are proposed. SUMMARY

[0003] Therefore, the present application provides an anti-accumulation filter and a filtering method thereof, which aims to solve one of the technical problems of the existing strong acid medium filtering equipment, such as easy accumulation and blockage, poor corrosion resistance, unreliable sealing, and low intelligentization of blowdown.

[0004] The technical scheme of the first aspect of the present application is implemented as follows: an anti-accumulation filter, comprising a barrel, a filter bag and a solid bag, the solid bag is placed in the interior of the barrel, the solid bag separates the barrel into a filtrate cavity and a sediment cavity, and locks the filter bag in the barrel; the filter bag is placed in the filtrate cavity, and the opening of the filter bag is connected with the sediment cavity; the barrel is provided with a liquid inlet and a liquid outlet, the liquid outlet is arranged at the end away from the liquid inlet and is connected with the filtrate cavity; the liquid inlet is provided with a liquid inlet pipe and is communicated with the filter bag, and the sediment cavity is connected with a waste liquid outlet; a positioning member is installed in the barrel to tightly lock the solid bag in the barrel.

[0005] Further preferably, the upper end of the barrel is provided with an inlet opening for placing the filter bag and the solid bag, and a cover is arranged on the inlet opening and locked by bolts; the positioning member is placed below the cover, and the liquid outlet is located on the side close to the inlet opening; the liquid inlet and the waste liquid outlet are arranged at the lower end of the barrel.

[0006] Further preferably, the barrel side wall is provided with a slope for extruding the solid bag member and a supporting block for supporting the solid bag member, the solid bag member is provided with a fixing seat, the fixing seat is supported by the supporting block, an outside wall of the fixing seat is provided with a ring groove for placing a sealing ring, and an outside of the sealing ring protrudes from the side wall of the fixing seat; the fixing seat is connected with a cage, and the filter bag member is locked in the cage by a lock ring.

[0007] Further preferably, the fixing seat and the lock ring are in threaded connection, and a clamping groove for clamping the filter bag member is formed between the fixing seat and the lock ring after the lock ring is completely screwed into the fixing seat; the filter bag member is provided with a solid bag ring clamped by the clamping groove.

[0008] Further preferably, the solid bag ring is in V-shaped cross section, and the angle between the two side walls of the solid bag ring increases when the solid bag ring is deformed by extrusion; a side wall edge of an outer side of the solid bag ring extends outward to form a circular horizontal surface, and the solid bag ring is connected with a filter bag.

[0009] Further preferably, the sealing ring is in a shape of a chevron, and the sealing ring has a self-recovery force after being deformed by extrusion of the slope.

[0010] Further preferably, the middle part of the positioning member is provided with a cross-shaped pushing frame, and a top part of the pushing frame is a base matched with the cover.

[0011] Further preferably, the bottom surface of the lock ring is provided with a pushing block symmetrically with respect to each other, and the lock ring is rotated out of the fixing seat by rotating the pushing block. Further preferably, an electric control box is mounted on one side wall of the barrel, an electronic blowdown valve is mounted on the top of the waste liquid outlet, and the electric control box is electrically connected with the electronic blowdown valve.

[0012] The second aspect of the present application provides a method for preventing deposition and filtration, which is applied to the above-mentioned filter for preventing deposition and filtration and includes the following steps. A strong acid corrosion-resistant filtering environment is constructed by using homopolypropylene material to prepare the barrel and the internal components in contact with liquid, and by using the high heat resistance and chemical corrosion resistance of the homopolypropylene material to construct an operating environment suitable for filtering hydrochloric acid or strong acid medium. Downward liquid inlet and reverse deposition prevention guidance: the strong acid liquid to be filtered is input through the liquid inlet at the lower end of the barrel, and the liquid is guided into the inside of the filter bag member from bottom to top through the liquid inlet pipe; the liquid flowing from bottom to top is used to wash the liquid in the filter bag member to keep the liquid in a turbulent state, so as to delay the clogging of the filter bag. Gravity sedimentation and solid-liquid separation: liquid penetrates the filter bag into the filtrate cavity, and is discharged from the liquid outlet located on the upper side of the barrel; and the larger particle impurities and accumulations intercepted by the filter bag, under the action of gravity, overcome the liquid upflow resistance, or during the intermittent period of filtration, naturally fall back and settle in the sedimentation cavity located at the bottom of the barrel, realizing solid-liquid separation and centralized collection of impurities; Intelligent monitoring and automatic pollution discharge: the electronic pollution discharge valve is controlled by the electric appliance control box, and according to the filtration time or pressure difference setting, the electronic pollution discharge valve is automatically opened regularly to discharge the high-concentration acidic waste liquid and impurities accumulated in the sedimentation cavity from the waste liquid outlet, and the self-cleaning of the filter is completed.

[0013] The embodiment of the present application has the following advantages due to the adoption of the above technical solutions: The present application adopts the design of an inlet at the bottom and an outlet at the top, and liquid flows through the filter bag from bottom to top, and the flow scouring force keeps the liquid in a turbulent state, avoiding the rapid formation of filter cake by small particles; at the same time, larger particles settle in the sedimentation cavity under the action of gravity, reducing the accumulation and blockage from the root, and prolonging the filtration period.

[0014] The barrel and the components in contact with liquid inside are made of homopolypropylene material, which has excellent strong acid corrosion resistance and high heat resistance, and can be used for filtering strong acid media such as hydrochloric acid for a long time, prolonging the service life of the equipment.

[0015] The filter bag of the present application is installed with a herringbone-shaped sealing ring in the ring groove, which deforms and generates self-recovery force under the extrusion of the inclined surface of the barrel, realizing reliable sealing of the filtrate cavity and the sedimentation cavity, and effectively preventing acid leakage.

[0016] The electric appliance control box and the electronic pollution discharge valve are electrically connected, and the pollution discharge period can be intelligently set according to the filtration time or pressure difference, realizing automatic pollution discharge without manual intervention, reducing labor intensity and improving production safety; The filter bag is locked by the thread connection of the lock ring and the fixed seat, the lock ring bottom is provided with symmetrical driving blocks, and the cross-shaped push frame of the positioning piece can ensure that the filter bag is locked firmly, and the assembly process is simple and efficient.

[0017] The above summary is only for the purpose of the description and is not intended to limit in any way. In addition to the above described illustrative aspects, embodiments and features, further aspects, embodiments and features of the present application will be readily apparent from the drawings and the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only represent some embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 is a structural diagram of the whole machine of the present application; Figure 2 is a front view structural diagram of the present application; Figure 3 is a side view structural diagram of the present application; Figure 4 is a sectional view structural diagram of the present application; Figure 5 is an enlarged structural diagram of A in the present application Figure 4 Figure 6 is an assembled structural diagram of the positioning member of the present application; Figure 7 is an assembled structural diagram of the pushing block of the present application; Figure 8 is a front view structural diagram of the positioning member, cage and fixing seat of the present application.

[0020] Reference signs: 10, barrel; 20, filter bag member; 30, bag fixing member; 101, filtrate cavity; 102, sediment cavity; 103, liquid inlet; 104, liquid outlet; 1031, liquid inlet pipe; 105, waste liquid outlet; 106, positioning member; 107, inlet opening; 40, cover; 302, supporting block; 301, fixing seat; 304, sealing ring; 303, ring placing groove; 305, cage; 306, locking ring; 307, clamping groove; 308, bag fixing ring; 1061, pushing frame; 1062, base; 3061, pushing block; 50, electric control box; 60, electronic blowdown valve. DETAILED DESCRIPTION

[0021] In the following, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and description are considered to be exemplary in nature rather than limiting.

[0022] ​It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component, or a middle component can exist at the same time. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. It should also be noted that, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. The terms used in the description of the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the present application.

[0023] It should also be noted that in the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and are not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0024] The above specific examples further illustrate the purpose, technical solutions and beneficial effects of the present application. It should be understood that the above description is only a specific embodiment of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

[0025] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0026] Embodiment 1 As Figures 1-8 shown, the embodiment of the present application provides a filter for preventing accumulation and precipitation, which comprises: a solid bag piece 30 arranged in the interior of a barrel body 10, the solid bag piece 30 separating the barrel body 10 into a filtrate cavity 101 and a precipitation cavity 102, and locking a filter bag piece 20 in the barrel body 10; The filter bag piece 20 is arranged in the filtrate cavity 101, and the opening of the filter bag piece 20 is connected with the precipitation cavity 102; The barrel body 10 is provided with a liquid inlet 103 and a liquid outlet 104, the liquid outlet 104 being arranged at one end away from the liquid inlet 103 and being connected with the filtrate cavity 101; The liquid inlet 103 is provided with a liquid inlet pipe 1031 and communicates with the filter bag 20, and the sediment cavity 102 is connected with the waste liquid outlet 105; The bucket body 10 is provided with a positioning member 106, so that the solid bag 30 is tightly locked in the bucket body 10. The upper end of the bucket body 10 is provided with an inlet opening 107 for placing the filter bag 20 and the solid bag 30, and the inlet opening 107 is provided with a cover 40 which is locked by bolts; the positioning member 106 is arranged below the cover 40, and the liquid outlet 104 is arranged on one side close to the inlet opening 107; the liquid inlet 103 and the waste liquid outlet 105 are arranged at the lower end of the bucket body 10. The side wall of the bucket body 10 is provided with an inclined surface for pressing the solid bag 30 and a supporting block 302 for supporting the solid bag 30, and the solid bag 30 is provided with a fixing seat 301; the fixing seat 301 is supported by the supporting block 302, and the outer side wall of the fixing seat 301 is provided with a ring groove 303 for placing a sealing ring 304, and the outer side of the sealing ring 304 protrudes from the side wall of the fixing seat 301; the fixing seat 301 is connected with a cage 305, and the filter bag 20 is locked in the cage 305 by a locking ring 306. The fixing seat 301 and the locking ring 306 are threadedly connected, and after the locking ring 306 is completely screwed into the fixing seat 301, a clamping groove 307 for clamping the filter bag 20 is formed between the fixing seat 301 and the locking ring 306; the filter bag 20 is provided with a solid bag ring 308 which is clamped by the clamping groove 307. The solid bag ring 308 has a V-shaped cross section, and when the solid bag ring 308 is deformed by being pressed, the included angle between the two side walls thereof will increase; the side wall edge of the outer side of the solid bag ring 308 extends outward to form a circular horizontal surface, and the solid bag ring 308 is connected with a filter bag. The sealing ring 304 has a herringbone shape, and after the sealing ring 304 is deformed by being pressed by the inclined surface, it has a self-restoring force. The middle part of the positioning member 106 is provided with a cross-shaped pushing frame 1061, and the top of the pushing frame 1061 is a base 1062 which is attached to the cover 40. The bottom surface of the locking ring 306 is symmetrically provided with a pushing block 3061, and rotating the pushing block 3061 can make the locking ring 306 rotate out of the fixing seat 301. An electric control box 50 is mounted on one side wall of the bucket body 10, and an electronic sewage valve 60 is mounted on the top of the waste liquid outlet 105, and the electric control box 50 is electrically connected with the electronic sewage valve 60. In this embodiment, specifically, the bucket body 10 is made of homopolypropylene (PPH) material and is injection molded into a cylindrical structure, and is provided with a liquid inlet 103 and a waste liquid outlet 105 at the lower end, an inlet opening 107 at the upper end, and a liquid outlet 104 at the upper part of the side wall. The inner side wall of the bucket body 10 is provided with a ring-shaped supporting block 302, and the inner wall of the bucket body above the supporting block 302 is an inclined surface for pressing the sealing ring 304.

[0027] In this embodiment, specifically, the filter bag piece 20: including the bag fixing ring 308 and the filter bag, the bag fixing ring 308 is made of elastic plastic, the cross section is V-shaped, the outer side wall edge extends outward to form a circular horizontal plane, the filter bag is fixed below the bag fixing ring 308 through a heat sealing process, and the filter bag is made of polytetrafluoroethylene fiber resistant to strong acid.

[0028] In this embodiment, specifically, the bag fixing piece 30: including a fixing seat 301, a cage 305 and a lock ring 306, the fixing seat 301 is annular, and an outer side wall is provided with a ring groove 303, a chevron-shaped rubber sealing ring 304 is installed in the ring groove 303, and the outer side of the sealing ring 304 protrudes from the side wall of the fixing seat 301. The cage 305 is a cylindrical mesh structure, integrally formed with the fixing seat 301 at the upper end, and used for supporting the filter bag. The inner side of the lock ring 306 is provided with an internal thread, which is matched with the external thread at the lower end of the fixing seat 301, and two actuating blocks 3061 are symmetrically arranged on the bottom surface of the lock ring 306. After the lock ring 306 is screwed, a clamping groove 307 is formed between the fixing seat 301 and the lock ring 306, which is used for clamping the bag fixing ring 308 of the filter bag piece 20.

[0029] In this embodiment, specifically, the positioning piece 106: made of homopolypropylene material, and provided with a cross-shaped push frame 1061 in the middle, the top of the push frame 1061 is a disc-shaped base 1062, the base 1062 is attached to the lower surface of the cover 40, and the lower end of the push frame 1061 abuts against the upper surface of the fixing seat 301, so as to ensure that the bag fixing piece 30 is locked firmly in the barrel 10.

[0030] In this embodiment, specifically, the cover 40: made of homopolypropylene material, locked with the barrel 10 through four circumferentially uniformly distributed bolts, and provided with a sealing gasket on the lower surface, so as to ensure the sealing performance of the inlet opening 107.

[0031] In this embodiment, specifically, the electric appliance control box 50: installed on the outer side wall of the barrel 10, and internally provided with a controller, a timer and a differential pressure sensor interface, so as to set the sewage discharge interval through the timer, or detect the pressure difference between the filtrate cavity 101 and the sediment cavity 102 through the differential pressure sensor, and realize the sewage discharge triggering control.

[0032] In this embodiment, specifically, the electronic sewage valve 60: made of a polytetrafluoroethylene material valve resistant to corrosion, installed at the top of the waste liquid port 105, and electrically connected with the electric appliance control box 50 through wires to receive control signals and realize automatic opening and closing.

[0033] Embodiment 2 The difference between the embodiment 1 and the embodiment 2 is that: a kind of anti-accumulation and sedimentation filtration method, including the following steps: Step one, build homopolypropylene strong acid corrosion resistant filtration environment: The barrel body 10 and the internal components in contact with the liquid are made of homopolypropylene material, which has high heat resistance and chemical corrosion resistance, and is suitable for filtering hydrochloric acid or strong acid medium. Step two, downward liquid inlet and reverse anti-deposition guide: The strong acid liquid to be filtered is input through the liquid inlet 103 at the lower end of the barrel body 10, and the liquid is guided into the inside of the filter bag piece 20 from bottom to top through the liquid inlet pipe 1031. The liquid flowing from bottom to top can keep the liquid in the filter bag piece 20 in a turbulent state, preventing fine particles from quickly forming a dense filter cake on the inner wall surface of the filter bag, thereby delaying the clogging of the filter bag. Step three, gravity sedimentation and solid-liquid separation: The liquid passes through the filter bag piece 20 into the filtrate cavity 101 and is discharged from the liquid outlet 104 at the upper side of the barrel body 10. The larger particle impurities and accumulations intercepted by the filter bag piece 20 naturally fall and settle under the action of their own gravity in the sedimentation cavity 102 at the bottom of the barrel body 10, overcoming the liquid upward resistance, or during the filtration interval, to realize solid-liquid separation and centralized collection of impurities. Step four, intelligent monitoring and automatic pollution discharge: The electronic pollution valve 60 is controlled by the electric control box 50, and according to the filtration time or pressure difference setting, the electronic pollution valve 60 is automatically opened regularly to discharge the high-concentration acidic waste liquid and impurities accumulated in the sedimentation cavity 102 from the waste liquid outlet 105, completing the self-cleaning of the filter.

[0034] Example 3 The difference between example 2 and example 3 is that the anti-deposition filtration method comprises the following steps: device assembly: first, place the fixed seat 301 of the solid bag piece 30 on the supporting block 302 of the barrel body 10, so that the sealing ring 304 outside the fixed seat 301 is in contact with the inclined surface of the inner wall of the barrel body; place the solid bag ring 308 of the filter bag piece 20 at the lower end of the fixed seat 301, tighten the lock ring 306, and lock the solid bag ring 308 tightly through the clamping groove 307; place the positioning piece 106 above the fixed seat 301, cover the cover 40 and tighten the bolts, so that the push rack 1061 of the positioning piece 106 presses the fixed seat 301 tightly; finally, connect the wires of the electric control box 50 and the electronic pollution valve 60, and complete the device assembly.

[0035] Filtering preparation: set the pollution parameters through the electric control box 50, such as setting the filtration time to 2 hours for pollution once, or setting the pressure difference threshold to 0.3 MPa to trigger pollution; check the sealing condition of each connection part to ensure no leakage.

[0036] Filtering operation: the hydrochloric acid medium to be filtered is input through the inlet 103, the liquid enters the inside of the filter bag piece 20 from bottom to top through the inlet pipe 1031, and under the action of flow scouring force, fine particles are not easy to adhere to the inner wall of the filter bag; the liquid penetrates the filter bag into the filtrate cavity 101, and is discharged from the outlet 104, completing solid-liquid separation; the intercepted larger particle impurities are settled to the sediment cavity 102 under the action of gravity.

[0037] Automatic pollution discharge: when the set pollution discharge time or pressure difference threshold value is reached, the electric control box 50 sends a signal to control the electronic pollution valve 60 to open, the impurities and part of the waste liquid in the sediment cavity 102 are discharged from the waste liquid outlet 105, the pollution discharge time is set to 30 seconds, and after the pollution discharge is completed, the electronic pollution valve 60 is automatically closed, and the filter continues the filtering operation.

[0038] Maintenance and replacement: when the filter bag is used for a period of time, the cover body 40 is opened, the lock ring 306 is unscrewed by rotating the knob 3061, the old filter bag piece 20 is taken out, the new filter bag piece 20 is replaced, the lock ring 306 is screwed again, the cover body 40 is closed, and the filter can continue to be used.

[0039] It should be noted that the relational terms herein such as first and second and the like are used only to differentiate one entity or action from another, and do not necessarily require or imply that there is any such actual relationship or order between these entities or actions. In addition, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or equipment including a series of elements includes not only those elements, but also other elements not explicitly listed or inherent to such a process, method, article or equipment.

[0040] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any skilled person in the art can easily think of various changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A sedimentation-preventing filter, comprising a barrel (10), a filter bag assembly (20), and a bag-fixing assembly (30), characterized in that: The fixing element (30) is placed inside the barrel body (10), dividing the barrel body (10) into a filtrate chamber (101) and a sedimentation chamber (102), and locking the filter bag element (20) in the barrel body (10); the filter bag element (20) is placed in the filtrate chamber (101), and the opening of the filter bag element (20) is connected to the sedimentation chamber (102); the barrel body (10) is provided with an inlet (103) and an outlet. (104) The outlet (104) is located at the end away from the inlet (103) and connected to the filtrate chamber (101); the inlet (103) is provided with an inlet pipe (1031) and is connected to the filter bag (20); the sedimentation chamber (102) is connected to the waste liquid outlet (105); a positioning component (106) is installed inside the barrel (10) to secure the bag (30) tightly in the barrel (10).

2. The anti-deposition filter according to claim 1, characterized in that: The upper end of the barrel (10) is provided with an inlet opening (107) for inserting a filter bag (20) and a bag fixing member (30). The inlet opening (107) is provided with a cover (40) that is locked by bolts. The positioning member (106) is placed below the cover (40). The liquid outlet (104) is located on the side close to the inlet opening (107). The liquid inlet (103) and the waste liquid outlet (105) are located at the lower end of the barrel (10).

3. The anti-deposition filter according to claim 2, characterized in that: The side wall of the barrel (10) is provided with an inclined surface for squeezing the bag fixing component (30) and a support block (302) for supporting the bag fixing component (30). The bag fixing component (30) is provided with a fixed seat (301). The fixed seat (301) is supported by the support block (302). The outer side wall of the fixed seat (301) is provided with a ring groove (303) for placing a sealing ring (304). The outer side of the sealing ring (304) protrudes from the side wall of the fixed seat (301). The fixed seat (301) is connected to a cage (305). The filter bag component (20) is locked in the cage (305) by a locking ring (306).

4. The anti-deposition filter according to claim 3, characterized in that: The fixing seat (301) and the locking ring (306) are connected by threads. After the locking ring (306) is fully screwed into the fixing seat (301), a clamping groove (307) for clamping the filter bag (20) will be formed between the two. The filter bag (20) is provided with a bag fixing ring (308) clamped by the clamping groove (307).

5. The anti-deposition filter according to claim 4, characterized in that: The fixed bag ring (308) has a V-shaped cross section. When the fixed bag ring (308) is squeezed and deformed, the included angle between its two side walls will increase. The outer side wall edge of the fixed bag ring (308) extends outward to form a circular horizontal surface. The fixed bag ring (308) is connected to a filter bag.

6. The anti-deposition filter according to claim 5, characterized in that: The sealing ring (304) is shaped like a herringbone, and the sealing ring (304) has self-restoring force after being deformed by the pressure of the inclined plane.

7. The anti-deposition filter according to claim 6, characterized in that: The positioning component (106) has a cross-shaped pusher (1061) in the middle, and the top of the pusher (1061) is a base (1062) that fits against the cover (40).

8. The anti-deposition filter according to claim 7, characterized in that: The bottom surface of the locking ring (306) is provided with symmetrical actuating blocks (3061). Rotating the actuating blocks (3061) causes the locking ring (306) to rotate out of the fixed seat (301).

9. The anti-deposition filter according to claim 8, characterized in that: An electrical control box (50) is installed on one side wall of the barrel (10), and an electronic drain valve (60) is installed on the top of the waste liquid outlet (105). The electrical control box (50) is electrically connected to the electronic drain valve (60).

10. A method for preventing sediment buildup during filtration, applied to the anti-sedimentation filter as described in claim 9, characterized in that, Includes the following steps: Step 1: Construct a strong acid-resistant filtration environment for homopolymer polypropylene. The barrel (10) and internal components in contact with the liquid are made of homopolymer polypropylene material. The high heat resistance and chemical corrosion resistance of homopolymer polypropylene material are used to construct an operating environment suitable for filtering hydrochloric acid or strong acid media. Step 2: Bottom liquid inlet and reverse anti-sedimentation guidance: The strong acid liquid to be filtered is input through the inlet (103) located at the lower end of the barrel (10). The liquid is guided from bottom to top into the filter bag (20) through the inlet pipe (1031). The upward flow of the liquid is used to keep the liquid in the filter bag (20) in a turbulent state, preventing fine particles from quickly forming a dense filter cake on the inner wall surface of the filter bag, thereby delaying the clogging of the filter bag. Step 3: Gravity sedimentation and solid-liquid separation: Liquid passes through the filter bag (20) into the filtrate chamber (101) and is discharged from the outlet (104) located on the upper side of the barrel (10); larger particulate impurities and accumulative materials intercepted by the filter bag (20) overcome the upward resistance of the liquid flow under their own gravity, or naturally fall back and settle into the sedimentation chamber (102) located at the bottom of the barrel (10) during the filtration interval, thereby achieving solid-liquid separation and centralized collection of impurities; Step 4: Intelligent monitoring and automatic sewage discharge: The electronic sewage discharge valve (60) is controlled by the electrical control box (50). According to the filtration time or pressure difference setting, the electronic sewage discharge valve (60) is automatically opened periodically to discharge the high-concentration acidic waste liquid and impurities accumulated in the sedimentation chamber (102) from the waste liquid port (105) to complete the self-cleaning of the filter.

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