Integrated treatment device for roxburgh rose stock solution membrane clarification capable of automatic backwashing

Abstract

The present application relates to the technical field of food processing and liquid separation, and in particular to a roxburgh rose raw liquid membrane clarification integrated treatment device capable of automatic backwashing, comprising a support assembly, a filter assembly and a cleaning assembly, the support assembly provides a structural basis, the filter assembly drives the raw liquid to pass through the filter membrane to complete solid-liquid separation by using a liquid inlet pump, the cleaning assembly drives the scraper to move up and down through a driver, and in combination with a gas pump and a cleaning pump, the gas or cleaning liquid is supplied to the annular pipe through a three-way switching valve to implement double cleaning of mechanical scraping and fluid backwashing on the filter membrane. The present application can realize efficient membrane filtration and automatic backwashing integrated operation of roxburgh rose raw liquid, effectively remove stubborn contaminants on the membrane surface, reduce downtime maintenance time, and improve production efficiency and continuous processing capacity.

Description

Technical Field

[0001] This invention relates to the fields of food processing and liquid separation technology, and in particular to an integrated treatment device for clarification of prickly pear liquid using an automatic backwashing membrane. Background Technology

[0002] As a wild fruit with high nutritional value, the processing and clarification of prickly pear juice is a key step in improving product quality and market value. In modern juice production processes, membrane filtration technology is widely used in the clarification and concentration of fruit and vegetable juices due to its advantages such as operation at room temperature, effective retention of heat-sensitive nutrients, and high separation precision. Existing membrane clarification systems typically consist of a storage tank, a transfer pump set, membrane modules, and a corresponding pipeline control system. Its basic working principle is to use pressure difference to drive the raw material liquid through a semi-permeable membrane, allowing small molecule solvents and solutes to pass through the membrane layer to become a clear liquid, while large molecule impurities, colloids, and suspended particles are retained, thus achieving solid-liquid separation. To maintain continuous system operation, conventional solutions usually include a basic flushing port or a simple backflushing loop to introduce cleaning media to flush the membrane surface when filtration resistance increases.

[0003] However, in long-term industrial applications, membrane filtration of prickly pear juice rich in pectin, protein, and fine suspended solids generally faces the technical bottleneck of severe membrane fouling leading to rapid flux decline. Due to the complex composition of the raw materials, contaminants easily deposit inside the membrane pores or form a dense filter cake layer on the membrane surface, causing a significant decrease in filtration efficiency and even system shutdown. Existing treatment methods often struggle to completely remove firmly attached complex contaminants without disassembling the equipment, resulting in shortened production cycles, excessively frequent cleaning, and increased manual maintenance costs. This limits the continuous and automated application of membrane technology in the deep processing of prickly pear juice, making it difficult to meet the demands of efficient and stable large-scale production. Summary of the Invention

[0004] The purpose of this invention is to provide an integrated membrane clarification treatment device for prickly pear juice with automatic backwashing capability. This device can solve the technical problems that have been commonly encountered in long-term industrial applications when filtering prickly pear juice rich in pectin, protein, and fine suspended matter. These problems include severe membrane fouling leading to rapid flux decline, and existing treatment methods often failing to completely remove firmly attached composite pollutants without disassembling the equipment. This results in shortened production cycles, excessively high cleaning frequency, and increased manual maintenance costs, thus limiting the continuous and automated level of membrane technology in the field of deep processing of prickly pear juice.

[0005] This application provides an integrated treatment device for automatic backwashing of prickly pear sap membrane clarification, including a support assembly, a filtration assembly, and a cleaning assembly. The support assembly includes a base and a support frame, with the support frame mounted on the base. The filtration assembly includes a filter box, a partition, an inlet pump, and multiple filter membranes. The filter box is fixed on the support frame, and the partition is located inside the filter box. The filter box has a raw material inlet, a sap outlet, and an impurity outlet. The inlet pump is connected to the raw material inlet, and the multiple filter membranes are mounted on the partition. The cleaning assembly includes a driver, a scraper, multiple annular tubes, an air inlet pipe, an air pump, a three-way switching valve, an inlet pipe, and a cleaning pump. The scraper has multiple through holes 18 and is slidably positioned below the partition. The multiple filter membranes are correspondingly positioned in the multiple through holes 18. The driver is used to drive the scraper to move up and down. The multiple annular tubes are correspondingly positioned in the multiple through holes 18. The three-way switching valve is connected to the annular tubes. The air inlet pipe and the inlet pipe are connected to the three-way switching valve. The air pump is connected to the air inlet pipe, and the cleaning pump is connected to the inlet pipe.

[0006] The filter assembly also includes a filter screen and a cleaner. The filter screen is located above the partition, and the cleaner is used to clean the filter screen.

[0007] The filter screen includes a filter screen body and a locking block, which is used to limit the movement of the filter screen body.

[0008] The cleaner includes a vibration unit, a brush, a first magnetic block, a second magnetic block, a moving screw, and a first motor. The vibration unit is located on one side of the filter body to cause the filter body to vibrate. The first magnetic block is located below the filter body, and the second magnetic block is located above the filter body, corresponding to the first magnetic block. The moving screw is threadedly connected to the second magnetic block. The output end of the first motor is connected to the moving screw. The brush is located on the second magnetic block and contacts the filter body.

[0009] The brush includes a brush body, a gear, and a rack. The brush body is rotatably mounted on the second magnetic block, the gear is fixed to the brush body, and the rack is fixed to the filter box and meshes with the gear.

[0010] The second magnetic block includes a block body and a movable wheel. The movable wheel is rotatably mounted on the block body and contacts the filter body.

[0011] The cleaner also includes a discharge pipe and a collection box. The discharge pipe is located on one side of the filter body, and the collection box is located on the other side of the discharge pipe.

[0012] The actuator includes a drive cylinder and a connecting rod. The connecting rod is connected to the scraper, and the output end of the drive cylinder is connected to the connecting rod.

[0013] The scraper includes a scraper body, a baffle, and multiple contact rings. The multiple contact rings are correspondingly arranged in multiple through holes 18 for contact with the filter membrane for cleaning. The baffle is arranged on the scraper body for water to flow through.

[0014] The multiple air outlets on the annular pipe are angled downwards.

[0015] This application provides an integrated membrane clarification treatment device for prickly pear juice with automatic backwashing capability. This solution integrates a support component, a filtration component, and a cleaning component to construct a highly efficient membrane filtration and self-cleaning system. The prickly pear juice is fed into the filtration chamber using an inlet pump, and under pressure, it passes through the filter membrane for clarification. Simultaneously, the actuator in the cleaning component drives a scraper with through-holes 18 to reciprocate up and down along the outer periphery of the filter membrane. A three-way switching valve flexibly switches between the air and liquid paths, allowing the high-pressure airflow generated by the air pump or the cleaning liquid delivered by the cleaning pump to be sprayed out through an annular pipe. Based on this, the mechanical wiping action of the scraper and the reverse impact force of the fluid sprayed from the annular pipe work together to directly peel off and remove stubborn contaminants such as pectin and protein adhering to the surface and pores of the filter membrane, thereby achieving online deep cleaning of the filter membrane. This effectively solves the technical problems commonly encountered in long-term industrial applications when using membrane filtration for prickly pear juice rich in pectin, protein, and fine suspended matter. These problems include severe membrane fouling leading to rapid flux decline, and existing treatment methods often failing to completely remove firmly attached complex pollutants without disassembling the equipment. This results in shortened production cycles, excessively frequent cleaning, and increased manual maintenance costs, limiting the continuous and automated application of membrane technology in the deep processing of prickly pear juice. Therefore, it avoids production interruptions caused by frequent shutdowns and manual cleaning, significantly improving the stability of equipment operation, the consistency of filtration efficiency, and the overall reliability of production. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0017] Figure 1 A schematic diagram of the structure of an integrated membrane clarification treatment device for prickly pear extract with automatic backwashing provided in this application; Figure 2 A schematic diagram of the right side of a prickly pear extract membrane clarification integrated treatment device with automatic backwashing capability provided in this application; Figure 3 A cross-sectional structural diagram of an integrated membrane clarification treatment device for prickly pear extract with automatic backwashing capability provided in this application; Figure 4 A longitudinal cross-sectional structural schematic diagram of an integrated membrane clarification treatment device for prickly pear extract with automatic backwashing provided in this application; Figure 5 A schematic diagram of the cross-sectional structure of the filter membrane of an integrated treatment device for automatic backwashing of prickly pear extract membrane clarification provided in this application.

[0018] Figure Labels 1-Base; 2-Support frame; 3-Filter box; 4-Baffle; 5-Inlet pump; 6-Filter membrane; 7-Raw material inlet; 8-Oil outlet; 9-Impurity outlet; 10-Driver; 11-Scraper; 12-Annular pipe; 13-Air inlet pipe; 14-Air pump; 15-Three-way switching valve; 16-Inlet pipe; 17-Cleaning pump; 19-Filter screen; 20-Cleaner; 21-Filter screen body; 22-Clamping block ; 23-Vibration unit; 24-Sweeping brush; 25-First magnetic block; 26-Second magnetic block; 27-Moving screw; 28-First motor; 29-Block; 30-Moving wheel; 31-Discharge pipe; 32-Collection box; 33-Drive cylinder; 34-Connecting rod; 35-Scraper body; 36-Baffle; 37-Contact ring; 38-Air outlet; 39-Sweeping brush body; 40-Gear; 41-Rack. Detailed Implementation

[0019] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0020] First embodiment: like Figures 1-5 As shown, this embodiment provides an integrated membrane clarification treatment device for prickly pear extract with automatic backwashing capability. The device includes a support assembly, a filter assembly, and a cleaning assembly. The support assembly includes a base 1 and a support frame 2, with the support frame 2 mounted on the base 1. In this embodiment, the base 1 serves as the mounting foundation for the entire device, supporting the weight of the filter box 3 and its internal liquid, ensuring the stability of the device during operation. The support frame 2 is fixedly connected to the upper surface of the base 1, supporting the filter box 3 at a suitable operating height, facilitating the connection of the raw material inlet 7 and the discharge of impurities from the outlet 9. Rigid connections such as welding or bolts are typically used between the support frame 2 and the base 1, and between the support frame 2 and the filter box 3, to ensure the overall structure remains stable and reliable even under vibrations caused by the operation of the inlet pump 5 and the air pump 14.

[0021] The filtration assembly includes a filter box 3, a partition 4, an inlet pump 5, and multiple filter membranes 6. The filter box 3 is fixed on the support frame 2, and the partition 4 is set inside the filter box 3. The filter box 3 has a raw material inlet 7, a raw liquid outlet 8, and an impurity outlet 9. The inlet pump 5 is connected to the raw material inlet 7, and the multiple filter membranes 6 are set on the partition 4.

[0022] Specifically, the filter box 3 constitutes the main sealed container for the membrane filtration reaction. Its internal space is divided into upper and lower areas by a partition 4, which is usually horizontally positioned to support the filter membranes 6 and separate the raw liquid from the clarified liquid. The feed pump 5 serves as the fluid power source; its inlet is connected to the prickly pear raw liquid storage tank, and its outlet is connected to the raw material inlet 7 on the side wall of the filter box 3 via a pipe, continuously pumping the raw liquid into the filter box 3. Multiple filter membranes 6 are installed on the partition 4, allowing the clarified liquid to pass through while retaining impurities such as pectin and fiber. The raw liquid outlet 8 and impurity outlet 9 are respectively located at corresponding positions in the filter box 3. The raw liquid outlet 8 is used to discharge the clarified liquid that has passed through the filter membranes 6, while the impurity outlet 9 is used to discharge concentrated impurities or waste cleaning liquid accumulated above the partition 4. It should be understood that the specific material and pore size of the filter membrane 6 can be selected according to the viscosity of the prickly pear raw liquid and the particle size characteristics of the impurities; for example, it can be a ceramic membrane, an organic tubular membrane, or a hollow fiber membrane.

[0023] The cleaning assembly includes a driver 10, a scraper 11, multiple annular pipes 12, an air inlet pipe 13, an air pump 14, a three-way switching valve 15, a liquid inlet pipe 16, and a cleaning pump 17. The scraper 11 has multiple through holes 1818 and is slidably disposed below the partition 4. Multiple filter membranes 6 are correspondingly disposed in the multiple through holes 1818. The driver 10 is used to drive the scraper 11 to move up and down. In this structure, the cleaning assembly constitutes the core actuator for realizing automatic backwashing. The scraper 11 is located below the partition 4, and the through holes 1818 on it correspond one-to-one with the positions of the filter membranes 6 on the partition 4, so that the lower end of the filter membrane 6 can pass through or extend into the through holes 1818. The driver 10 can be a cylinder, a hydraulic cylinder, or an electric push rod. Its fixed end is connected to the bottom of the filter box 3 or the support frame 2, and its telescopic end is connected to the scraper 11 to drive the scraper 11 to reciprocate up and down in the vertical direction. This sliding fit allows the scraper 11 to physically scrape the outer surface of the filter membrane 6 (or the portion extending into the through hole 18) during movement, removing the attached filter cake layer. At the same time, an appropriate gap is maintained between the inner wall of the through hole 1818 and the filter membrane 6, ensuring both the freedom of relative movement and providing a channel for the flow of backwashing media.

[0024] Multiple annular tubes 12 are correspondingly installed within multiple through holes 1818. A three-way switching valve 15 is connected to the annular tubes 12. An air inlet pipe 13 and a liquid inlet pipe 16 are connected to the three-way switching valve 15. An air pump 14 is connected to the air inlet pipe 13, and a cleaning pump 17 is connected to the liquid inlet pipe 16. Specifically, the annular tube 12 is coaxially sleeved on the outside of the filter membrane 6 and located inside the through holes 1818. Several micro-holes or nozzles are opened on its tube wall for spraying cleaning media onto the surface of the filter membrane 6. The three-way switching valve 15 serves as a media selection control element. Its common port is connected to the annular tube 12, and the other two ports are connected to the air inlet pipe 13 and the liquid inlet pipe 16, respectively. The air pump 14 provides a high-pressure air source through the air inlet pipe 13 to generate pulsed or continuous airflow for air backwashing. The cleaning pump 17 provides cleaning fluid (such as water, acid or alkali solutions, or enzyme preparations) through the liquid inlet pipe 16 for chemical cleaning or hydraulic backwashing. By controlling the valve core position of the three-way switching valve 15, the medium entering the annular pipe 12 can be flexibly switched to gas or liquid, or simultaneously closed for normal filtration. For example, during gas washing, the air pump 14 operates, the three-way switching valve 15 switches to the gas path, and the airflow is ejected through the annular pipe 12, using the shearing and impact force of the airflow to shake off the dirt on the surface of the filter membrane 6; during liquid washing, the cleaning pump 17 operates, the three-way switching valve 15 switches to the liquid path, and the cleaning liquid reverses its flow or flushes the filter membrane 6, dissolving and carrying away residual impurities.

[0025] The core innovation of this application lies in the construction of an automatic cleaning system that integrates mechanical scraping and gas-liquid dual-media backwashing. Through the reciprocating motion of the scraper 11 outside the filter membrane 6 and the multi-media spray inside the annular tube 12, online, efficient and automated cleaning of filter membrane blockage during the filtration of prickly pear raw liquid is achieved.

[0026] The working process and principle of this application are as follows: In the filtration stage, the prickly pear juice enters the filter box 3 through the raw material inlet 7 under the action of the inlet pump 5. Under pressure, it passes through the filter membrane 6 on the partition 4, and the clarified liquid flows out from the raw liquid outlet 8. Impurities are trapped on the surface of the filter membrane 6. When the filtration flux decreases or the set time is reached, the cleaning program is started: the driver 10 drives the scraper 11 to move up and down. The inner wall of the through hole 1818 of the scraper 11 slides relative to the filter membrane 6, scraping off the surface filter cake. At the same time, the three-way switching valve 15 is activated to connect the air path. The high-pressure gas generated by the air pump 14 enters the annular pipe 12 through the air inlet pipe 13 and the three-way switching valve 15, and is sprayed out from the annular pipe 12 to backwash the filter membrane 6, blowing off the impurities scraped off by the scraper 11. If deep cleaning is required, the three-way switching valve 15 is switched to the liquid path, and the cleaning pump 17 pumps the cleaning liquid into the annular pipe 12 to soak or backwash the filter membrane 6. The waste liquid and impurities after cleaning are finally discharged from the device through the impurity discharge outlet 9.

[0027] Through the above technical solution, this application achieves the following beneficial effects: Due to the mechanical scraping structure using a scraper 11 and a driver 10, the sticky filter cake adhering to the surface of the filter membrane 6 can be effectively removed, solving the problem that simple water backwashing is insufficient to completely remove pectin-like substances from the prickly pear juice; The annular pipe 12, combined with a three-way switching valve 15, an air pump 14, and a cleaning pump 17, enables rapid switching and combination of air washing and liquid washing backwashing modes. Utilizing the dual effects of airflow shearing disturbance and liquid flow dissolution and scouring, backwashing efficiency and filter membrane regeneration rate are significantly improved; Due to the coordinated operation of all components of the cleaning assembly, the device can complete fully automatic cleaning without disassembling the filter membrane, greatly reducing manual maintenance intensity, extending the service life of the filter membrane, and ensuring continuous production capacity and efficiency for prickly pear juice membrane clarification treatment.

[0028] The filtration assembly also includes a filter screen 19 and a cleaner 20. The filter screen 19 is positioned above the partition 4, and the cleaner 20 is used to clean the filter screen. The filter screen 19 performs preliminary interception before the raw liquid enters the fine filtration area containing the filter membrane 6, trapping larger solid impurities in the raw liquid on its upper surface. This reduces the filtration load on the subsequent filter membrane 6, decreases the cleaning frequency of the filter membrane 6, and extends its service life. The mesh size of the filter screen 19 can be set according to the actual distribution of impurities in the prickly pear raw liquid; for example, it can be a metal wire mesh or a polymer filter screen between 10 and 50 mesh. This embodiment does not impose any special limitations on this.

[0029] The cleaner 20 can automatically remove large particles of impurities trapped on the filter screen 19, preventing the filter screen 19 from becoming clogged and hindering the flow of the original liquid. The cleaner 20 can use various methods such as mechanical scraping, airflow backflushing, or vibration tapping. Furthermore, the filter screen 19 includes a filter screen body 21 and a retaining block 22, which is used to limit the position of the filter screen body 21. The filter screen body 21, as a coarse filtration unit in the filtration assembly, is mainly used to intercept larger particulate impurities in the prickly pear extract, thereby reducing the filtration load on the subsequent filter membrane and preventing large particles from scratching or clogging the surface of the precision filter membrane. The filter screen body 21 is typically made of corrosion-resistant metal wire mesh or polymer mesh with a certain structural strength. Its mesh size can be selected according to the pretreatment requirements of the raw material, for example, it can be set to a specification between 20 mesh and 100 mesh; this embodiment does not impose any special limitations on this.

[0030] The locking block 22 is disposed at the edge of the filter body 21 or at the location in contact with the inner wall of the filter box. Its function is to mechanically position and fix the filter body 21, preventing it from shifting or loosening under the impact of liquid flow or vibration during device operation. Exemplarily, the locking block 22 can be a protruding structure extending from the edge of the filter body 21, or it can be a pressure plate or clamping component independently installed on the inner wall of the filter box to press the edge of the filter body 21. During assembly, the locking block 22 cooperates with the corresponding groove or positioning surface inside the filter box to firmly lock the filter body 21 in a predetermined position, thereby ensuring the sealing and structural stability of the filtration process. Through the above technical solution, this application achieves effective limiting of the filter body 21, solves the problem of possible displacement or loosening of the filter body during use, ensures its stable installation, enhances the installation reliability of the filter, and prevents displacement during operation that could cause leakage or partial blockage.

[0031] Furthermore, the cleaner 20 includes a vibration unit 23, a brush 24, a first magnetic block 25, a second magnetic block 26, a moving screw 27, and a first motor 28. The vibration unit 23 is disposed on one side of the filter body 21 to cause the filter body 21 to vibrate. The first magnetic block 25 is disposed below the filter body 21, and the second magnetic block 26 is disposed above the filter body 21 corresponding to the first magnetic block 25. The moving screw 27 is threadedly connected to the second magnetic block 26. The output end of the first motor 28 is connected to the moving screw 27. The brush 24 is disposed on the second magnetic block 26 and contacts the filter body 21.

[0032] The vibration unit 23, acting as the excitation source for the filter body 21, functions primarily to disrupt the adhesion of impurity particles on the surface and within the mesh of the filter body 21 by generating periodic mechanical vibrations. This loosens and removes solids that were originally tightly clogged or adhered to the mesh fibers. Unlike conventional designs that rely solely on water rinsing or mechanical scraping, this application innovatively introduces a vibration-assisted cleaning mechanism. The vibration unit 23 can be an eccentric motor, electromagnetic vibrator, or pneumatic vibrator. Its installation position can be fixed to the inner wall of the filter box 3, directly or through elastic connectors contacting the frame of the filter body 21, transmitting vibration force to the entire filter surface. This high-frequency vibration effectively addresses the clogging problem caused by sticky substances such as pectin and fibers in the prickly pear juice, significantly reducing the difficulty of physical cleaning of the filter. For example, the vibration frequency f generated by the vibration unit 23 can be adjusted according to the filter mesh size and the viscosity of the raw liquid. The typical relationship can be expressed as f=k·ηd2, where k is a coefficient related to the filter material, η is the dynamic viscosity of the raw liquid, and d is the diameter of the filter mesh. By optimizing this parameter relationship, it can be ensured that the vibration energy is sufficient to dislodge impurities without causing fatigue damage to the filter structure.

[0033] The first magnetic block 25 and the second magnetic block 26 constitute a non-contact magnetic coupling transmission mechanism. The first magnetic block 25, as a follower component, is fixedly mounted on the lower surface of the filter body 21 or on a support structure rigidly connected to it; the second magnetic block 26, as an active drive component, is mounted on the upper side of the filter body 21. A layer of the filter body 21 separates the two components, and magnetic force is used to achieve attraction or repulsion across the filter. This design overcomes the limitations of traditional mechanical transmissions that require physical components such as shafts and connecting rods to penetrate the filter for connection, avoiding the risk of sealing failure caused by opening holes or complex dynamic sealing structures on the filter surface. It is particularly suitable for liquid treatment environments such as those requiring high cleanliness and prone to leakage, such as prickly pear extract. Both the first magnetic block 25 and the second magnetic block 26 can be made of permanent magnet materials (such as neodymium iron boron), or an electromagnetic coil can be used in the second magnetic block 26 to achieve controllable adjustment of the magnetic adsorption force.

[0034] The movable screw 27 and the first motor 28 together constitute a linear drive module, used to convert the rotational motion of the first motor 28 into the linear reciprocating motion of the second magnetic block 26. Specifically, the first motor 28 is fixedly mounted on a bracket on the top of the filter box 3, and its output shaft is fixedly connected to one end of the movable screw 27. The movable screw 27 passes through a pre-set threaded hole on the second magnetic block 26, forming a screw-nut pair. When the first motor 28 rotates, it drives the movable screw 27 to rotate, thereby causing the second magnetic block 26 to move linearly along the axial direction of the movable screw 27. By controlling the forward and reverse rotation of the first motor 28, the reciprocating movement of the second magnetic block 26 within its travel range above the filter body 21 can be achieved. This screw drive structure has the characteristics of high transmission accuracy and good self-locking, which can ensure the stability of the movement trajectory of the brush 24. According to the screw drive principle, the moving speed v of the second magnetic block 26, the rotational speed n of the first motor 28, and the lead P of the moving screw 27 satisfy the following relationship: v = n·P60, where n is in revolutions per minute (r / min), P is in millimeters (mm), and v is in millimeters per second (mm / s). This mathematical model provides a theoretical basis for precisely controlling the cleaning speed of the brush 24, thereby allowing the cleaning force to be adjusted according to the degree of filter surface contamination.

[0035] The brush 24 is an actuator that directly acts on the surface of the filter body 21. It moves synchronously with the second magnetic block 26 to physically scrub the filter body 21. The bristles of the brush 24 can be made of wear-resistant, corrosion-resistant, and elastic polymer materials (such as nylon or polypropylene), or soft metal wire, to effectively remove residual impurities while avoiding scratching the metal mesh of the filter body 21. As the second magnetic block 26 moves under the drive of the moving screw 27, the brush 24 slides across the surface of the filter body 21, pushing stubborn impurities that remain after being loosened by the vibration unit 23 toward the impurity discharge port 9. The brush 24 can be connected to the second magnetic block 26 by snap-fit, adhesive, or screw fixing. To accommodate minor unevenness on the filter surface, the mounting base of the brush 24 can be designed as a floating structure to maintain good contact pressure with the filter body 21 at all times.

[0036] Specifically, this embodiment utilizes the coordinated operation of the vibration unit 23, the first magnetic block 25, the second magnetic block 26, the moving screw 27, and the first motor 28 to construct a composite cleaning system combining vibration loosening, magnetic drive, and mechanical cleaning. The vibration unit 23 first applies high-frequency vibration to the filter body 21, initially loosening the blockages within the filter pores. Subsequently, the first motor 28 drives the moving screw 27 to rotate, causing the second magnetic block 26 to move linearly. Due to the magnetic coupling between the second magnetic block 26 and the first magnetic block 25, the first magnetic block 25 subsequently exhibits a corresponding movement tendency below the filter body 21 or directly drives localized micro-movements in the filter. Simultaneously, the brush 24 mounted on the second magnetic block 26 reciprocates and scrapes the surface of the filter body 21. This multi-stage, interconnected cleaning method can penetrate deep into the filter mesh and its surface, thoroughly removing impurities of different shapes.

[0037] The brush 24 includes a brush body 39, a gear 40, and a rack 41. The brush body is rotatably mounted on the second magnetic block, the gear is fixed to the brush body, and the rack is fixed to the filter box and meshes with the gear.

[0038] In its implementation, the brush body 39, as the working component that directly contacts the filter body 21 and performs the cleaning action, is rotatably mounted on the second magnetic block 26. This means that the brush body 39 can freely rotate relative to the second magnetic block 26 around its own axis. This rotatable connection can be achieved by setting a rotating shaft at the end of the brush body 39 and opening a corresponding shaft hole in the second magnetic block 26. A bearing can be installed between the rotating shaft and the shaft hole to reduce rotational friction resistance and ensure rotational flexibility. The gear 40 is fixedly connected to the brush body 39, specifically at one end of the brush body 39, with its axis coinciding with the rotation axis of the brush body 39, thus forming a synchronous rotational linkage with the brush body 39. The gear 40 and the brush body 39 can be fixed using key connections, set screws, or integral molding processes to ensure that no relative slippage occurs between them during transmission. The rack 41 is fixedly installed on the inner wall of the filter box 3. Its installation position should match the movement trajectory of the gear 40 so that the gear 40 can always maintain correct meshing with the rack 41 as it moves with the second magnetic block 26. The rack 41 extends along the movement path of the brush 24, and its length determines the effective reciprocating stroke range of the brush 24.

[0039] When the brush 24, driven by the first motor 28, reciprocates linearly along the moving screw 27 with the second magnetic block 26, the gear 40 fixed on the brush body 39 moves accordingly. Since the rack 41 is stationary on the filter box 3, relative motion occurs between the moving gear 40 and the stationary rack 41, thus forming a gear and rack meshing transmission. According to the gear and rack transmission principle, the linear movement of the gear 40 is converted into rotational motion around its own axis, thereby driving the brush body 39 to rotate synchronously. In this motion mode, the brush body 39 not only moves laterally along the surface of the filter body 21 but also rotates at high speed around its own axis, thus achieving a composite cleaning motion of moving and rotating simultaneously.

[0040] Through the above technical solution, this application achieves a composite and efficient cleaning method for the brush 24. By engaging the gear 40 and rack 41, the single linear translational motion of the brush 24 is transformed into a composite motion combining linear movement and rotation. This allows the bristles on the brush body 39 to repeatedly act on the surface and deep within the mesh of the filter body 21 in a spiral or multi-angle manner, greatly expanding the effective cleaning area per unit time. This composite motion can more effectively remove the prickly pear pulp fibers, colloids, and impurities attached to the filter body 21, significantly improving the cleaning efficiency and permeability of the filter, and solving the problems of numerous cleaning dead spots and limited decontamination capacity when the brush only performs translational motion. Furthermore, this transmission structure fully utilizes the original moving power of the brush 24 as input, eliminating the need for an additional motor or power source to drive the brush rotation. This not only simplifies the overall structure of the device, reduces manufacturing costs and control complexity, but also improves the reliability and energy efficiency of the device during operation.

[0041] Furthermore, the second magnetic block 26 includes a block body 29 and a movable wheel 30, which is rotatably mounted on the block body 29 and contacts the filter body 21.

[0042] Block 29 serves as the main supporting structure for the second magnetic block 26, housing components such as the moving wheel 30 and the sweeping brush 24. It typically contains magnets to create a magnetic attraction with the first magnetic block 25. The material of block 29 can be selected as needed; for example, it can be a ferromagnetic metal or a non-metallic material encasing the magnets. The moving wheel 30 is rotatably mounted on block 29, specifically through connecting components such as shafts and bearings, allowing it to rotate freely around its own axis. There can be one or more moving wheels 30. When multiple wheels are present, they can be arranged in a triangular or rectangular pattern to ensure the balance and stability of block 29 during movement.

[0043] When the first motor 28 drives the moving screw 27 to rotate and moves the second magnetic block 26, the moving wheel 30 rolls forward on the surface of the filter body 21. This rolling contact method transforms the sliding friction that might otherwise exist into rolling friction, significantly reducing the frictional resistance of the second magnetic block 26 as it moves on the filter body 21. This reduces driving energy consumption and wear on the surface of the filter body 21 during movement, thus protecting the filter body 21 and extending its service life. Simultaneously, rolling friction also improves the smoothness of the cleaner's movement, preventing jamming that could affect the cleaning effect. The wheel surface material of the moving wheel 30 can be made of rubber, nylon, or polytetrafluoroethylene, which have a certain coefficient of friction and are wear-resistant, to ensure smooth rolling while providing appropriate grip to prevent slippage.

[0044] The cleaner 20 also includes a discharge pipe 31 and a collection box 32. The discharge pipe 31 is located on one side of the filter body 21, and the collection box 32 is located on one side of the discharge pipe 31.

[0045] The discharge pipe 31 is used to receive and guide impurities and mixed liquids cleaned from the filter body 21. Its connection method can be flange connection, threaded connection, or welding, and it can be fixed to the inner wall of the filter box 3 or the side frame of the filter body 21. The specific setting position can be optimized according to the tilt angle of the filter body 21 or the path of impurity sliding. During operation, solid impurities such as fruit pulp fibers and sediments that fall off the filter surface due to the action of the brush 24 and vibration unit 23 slide down the surface of the filter body 21 under the action of gravity or fluid scouring, and then enter the discharge pipe 31.

[0046] The collection box 32, serving as a centralized container for impurities, is located downstream of the outlet of the discharge pipe 31. It receives waste liquid and solid impurities discharged from the discharge pipe 31. The collection box can be made of corrosion-resistant stainless steel or high-density polyethylene, and its shape can be square, round, or other irregularly shaped depending on the installation space. Through this structural arrangement, the collected impurities can be guided systematically to the designated collection area, achieving centralized management and automated discharge of impurities. This effectively avoids the problem of secondary pollution caused by the disorderly accumulation of impurities in the filter box 3 or their circulation with the raw liquid, thus ensuring the continuity of the membrane clarification process and the cleanliness of the working environment.

[0047] Furthermore, the driver 10 includes a drive cylinder 33 and a connecting rod 34, the output end of the drive cylinder is connected to the connecting rod, and the connecting rod is connected to the scraper.

[0048] The drive cylinder 33, as the core power output component, converts the pressure energy of compressed air into linear mechanical kinetic energy, thereby providing a stable and controllable driving force for the up-and-down reciprocating motion of the scraper 11. In practical applications, the drive cylinder 33 can be selected as a single-acting or double-acting cylinder according to the working conditions. It has advantages such as compact structure, fast response speed, and low maintenance cost, and is particularly suitable for automatic backwashing scenarios that require frequent start-stop and rapid action. The connecting rod 34 serves as a transmission connection and force transmission between the drive cylinder 33 and the scraper 11. One end of it is fixedly connected to the output end of the drive cylinder 33, and the other end is fixedly connected to the scraper 11. To ensure transmission reliability, the connecting rod 34 can be made of high-strength carbon steel or stainless steel, which have sufficient tensile strength and rigidity to prevent bending deformation during reciprocating motion. The specific connection between the connecting rod 34 and the scraper 11 can be achieved by threaded connection, flange connection, or welding, as long as it ensures that the two maintain a rigid connection and no relative displacement during movement.

[0049] By employing a drive mechanism using a drive cylinder 33 in conjunction with a connecting rod 34, and leveraging the high responsiveness of pneumatic transmission, the lifting stroke and speed of the scraper 11 below the partition 4 can be precisely controlled. This design not only clarifies the specific structure of the drive unit 10 and solves the problem of poor execution accuracy in the original technology, but also ensures the smooth transmission of driving force through the intermediate transmission of the connecting rod 34. This effectively avoids the lateral force or jamming risks that may occur with direct drive, thereby improving the stability and reliability of the scraper 11 when cleaning impurities from the filter membrane 6 and extending the service life of the equipment.

[0050] Furthermore, the scraper 11 includes a scraper body 35, a baffle 36, and multiple contact rings 37. The scraper body 35 serves as the main load-bearing structure of the entire scraper 11, is used to mount the baffle 36 and contact rings 37, and is connected to the output end of the driver 10. The scraper body 35 can be made of stainless steel, engineering plastic, or corrosion-resistant alloy material, and its specific shape can be adaptively designed according to the shape and size of the partition 4. For example, it can be a rectangular plate, a circular plate, or a frame structure. This embodiment does not impose any special limitations on this.

[0051] A baffle 36 is mounted on the scraper body 35 to allow water flow. The baffle 36 primarily functions to guide fluid flow and intercept impurities. During the up-and-down movement of the scraper 11, the baffle 36 allows the liquid to be filtered or the cleaning fluid to flow smoothly across the scraper body 35, reducing fluid resistance. Simultaneously, the baffle 36 prevents larger particles of impurities carried in the liquid from passing through the scraper 11, avoiding impurity accumulation below the scraper 11 and preventing it from affecting the scraper 11's movement or causing secondary pollution. The mesh density of the baffle 36 can be selected according to the particle size of the impurities in the treated liquid; for example, it can be a 20-mesh to 100-mesh metal wire mesh or a polymer filter screen. The baffle 36 can be fixed to the scraper body 35 by welding, screwing, snap-fitting, or embedded installation. Its installation position can be on the liquid-facing or liquid-repellent side of the scraper body 35, depending on the direction of liquid flow.

[0052] Multiple contact rings 37 are correspondingly disposed within multiple through holes 1818 for contact with the filter membrane 6 for cleaning. The contact rings 37 are the working components of the scraper 11 that directly act on the filter membrane 6. Each contact ring 37 corresponds to one through hole 1818 and is located on the inner wall of the through hole 1818. When the scraper 11 slides up and down along the partition 4 under the drive of the driver 10, the inner circumferential surface of the contact ring 37 can slide tightly against the outer surface of the filter membrane 6, thereby physically scraping and wiping away the filter cake, colloid, or impurities adhering to the surface of the filter membrane 6. The contact rings 37 can be made of wear-resistant, elastic, and corrosion-resistant materials, such as rubber, silicone, polytetrafluoroethylene, or metal rings coated with a soft coating. Their cross-sectional shape can be designed as circular, rectangular, or trapezoidal, etc., according to actual cleaning requirements. The contact rings 37 and the through holes 1818 can be fixed by interference fit, bonding, or slot connection to ensure that the contact rings 37 do not loosen or fall off during the reciprocating motion of the scraper 11. In addition, to further improve the cleaning effect, the inner diameter of the contact ring 37 can be designed to match the outer diameter of the filter membrane 6, so that the contact ring 37 and the filter membrane 6 maintain an appropriate interference or contact pressure to ensure that impurities can be effectively removed, while avoiding excessive compression that could damage the filter membrane 6.

[0053] Through the above technical solution, this application achieves a refined design of the scraper 11 structure. Because a contact ring 37 corresponding to the through hole 1818 is provided on the scraper 11, the scraper 11 can perform targeted circumferential scraping of the filter membrane 6 through the contact ring 37 during movement. Compared to a planar scraper, this point-to-point or line-to-line contact method can more effectively remove stubborn blockages from the surface of the filter membrane 6, significantly improving the cleaning efficiency and backwashing effect of the filter membrane 6. Simultaneously, by providing a baffle 36 on the scraper body 35, it ensures that the liquid can pass smoothly through the scraper 11, reducing the fluid resistance during the movement of the scraper 11, while also using the baffle 36 to intercept larger particles of impurities, preventing impurities from accumulating below the scraper 11. This optimizes the internal fluid dynamics of the device, extends the service life of the filter membrane 6, and ensures the continuous and stable operation of the overall treatment device.

[0054] Furthermore, the multiple air outlets 38 on the annular tube 12 are inclined downwards. As a key structure on the annular tube 12 for releasing backwash cleaning airflow, the opening angle of the air outlets 38 directly determines the jet direction and effect of the airflow. By designing the air outlets 38 to be inclined downwards, the high-pressure gas entering the annular tube 12 from the air pump 14 through the air inlet pipe 13 and the three-way switching valve 15 can be sprayed onto the surface of the filter membrane 6 below at a specific inclination angle. This inclination angle creates a turbulent field with strong shear force on the surface of the filter membrane 6, thereby more effectively stripping away the prickly pear extract colloidal particles and impurities adhering to the pores and surface of the filter membrane 6. Exemplarily, the angle between the central axis of the air outlet 38 and the horizontal plane can be set according to the viscosity of the actual treated liquid, the material of the filter membrane 6, and the pressure of the air pump 14, for example, it can be set to 30 degrees, 45 degrees, or 60 degrees, etc., and this embodiment does not impose any special limitations on this. This directional spraying method avoids energy dissipation caused by vertical airflow impact, and also prevents cleaning dead zones caused by disordered airflow diffusion, significantly improving the targeting and cleaning efficiency of the backwashing process, thereby reducing the air source energy consumption required to achieve the same cleaning effect.

[0055] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. An integrated membrane clarification treatment device for prickly pear extract with automatic backwashing capability, characterized in that, The device includes a support assembly, a filter assembly, and a cleaning assembly. The support assembly includes a base and a support frame, with the support frame mounted on the base. The filter assembly includes a filter box, a partition, an inlet pump, and multiple filter membranes. The filter box is fixed on the support frame, and the partition is disposed inside the filter box. The filter box has a raw material inlet, a raw liquid outlet, and an impurity outlet. The inlet pump is connected to the raw material inlet, and the multiple filter membranes are disposed on the partition. The cleaning assembly includes a driver, a scraper, multiple annular tubes, an air inlet pipe, an air pump, a three-way switching valve, a liquid inlet pipe, and a cleaning pump. The scraper has multiple through holes 18 and is slidably disposed below the partition. Multiple filter membranes are correspondingly disposed in the multiple through holes 18. The driver is used to drive the scraper to move up and down. Multiple annular tubes are correspondingly disposed in the multiple through holes 18. The three-way switching valve is connected to the annular tubes. The air inlet pipe and the liquid inlet pipe are connected to the three-way switching valve. The air pump is connected to the air inlet pipe, and the cleaning pump is connected to the liquid inlet pipe.

2. The integrated membrane clarification treatment device for prickly pear extract with automatic backwashing as described in claim 1, characterized in that, The filtration assembly also includes a filter screen and a cleaner, the filter screen being disposed above the partition, and the cleaner being used to clean the filter screen.

3. The integrated membrane clarification treatment device for prickly pear extract with automatic backwashing as described in claim 2, characterized in that, The filter screen includes a filter screen body and a locking block, the locking block being used to limit the position of the filter screen body.

4. The integrated membrane clarification treatment device for prickly pear extract with automatic backwashing as described in claim 3, characterized in that, The cleaner includes a vibration unit, a brush, a first magnetic block, a second magnetic block, a moving screw, and a first motor. The vibration unit is disposed on one side of the filter body to cause the filter body to vibrate. The first magnetic block is disposed below the filter body, and the second magnetic block is disposed above the filter body corresponding to the first magnetic block. The moving screw is threadedly connected to the second magnetic block. The output end of the first motor is connected to the moving screw. The brush is disposed on the second magnetic block and contacts the filter body.

5. The integrated membrane clarification treatment device for prickly pear extract with automatic backwashing as described in claim 4, characterized in that, The brush includes a brush body, a gear, and a rack. The brush body is rotatably mounted on the second magnetic block. The gear is fixed to the brush body, and the rack is fixed to the filter box and meshes with the gear.

6. The integrated membrane clarification treatment device for prickly pear extract with automatic backwashing as described in claim 5, characterized in that, The second magnetic block includes a block body and a movable wheel, the movable wheel being rotatably mounted on the block body and contacting the filter body.

7. The integrated membrane clarification treatment device for prickly pear extract with automatic backwashing as described in claim 6, characterized in that, The cleaner also includes a discharge pipe and a collection box, the discharge pipe being disposed on one side of the filter body and the collection box being disposed on one side of the discharge pipe.

8. The integrated membrane clarification treatment device for prickly pear extract with automatic backwashing as described in claim 7, characterized in that, The driver includes a drive cylinder and a connecting rod, the connecting rod being connected to the scraper, and the output end of the drive cylinder being connected to the connecting rod.

9. The integrated membrane clarification treatment device for prickly pear extract with automatic backwashing as described in claim 8, characterized in that, The scraper includes a scraper body, a baffle, and multiple contact rings. The multiple contact rings are correspondingly disposed in multiple through holes 18 for contact with the filter membrane for cleaning. The baffle is disposed on the scraper body for water to flow through.

10. The integrated membrane clarification treatment device for prickly pear extract with automatic backwashing as described in claim 9, characterized in that, The multiple air outlets on the annular tube are arranged at an angle downwards.

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