Anti-blocking filter irrigation system for yellow river water drip irrigation

Abstract

The application discloses a kind of anti-blocking filtration irrigation systems for Yellow River drip irrigation;The system includes cyclone pre-separation unit, dynamic membrane filtration unit and drip irrigation pipe network unit. Cyclone pre-separation unit removes coarse particle silt using centrifugal force;Dynamic membrane filtration unit achieves dynamic filtration through the shearing scouring of rotating membrane cylinder and cleaning element;The emitter of drip irrigation pipe network unit is provided with a sand discharge channel, and the incoming fine particles are actively discharged. The application breaks through the technical prejudice of traditional extreme filtration through cyclone pre-separation, dynamic membrane fine filtration and emitter sand discharge, significantly reduces filtration cost and clogging risk, and is suitable for high-sand-content water source drip irrigation projects.

Description

Technical Field

[0001] This invention relates to the field of agricultural water-saving irrigation technology, specifically to an anti-clogging filter irrigation system for drip irrigation from the Yellow River, applicable to drip irrigation system projects in the Yellow River irrigation area and similar high sediment content water source conditions. Background Technology

[0002] Drip irrigation, as one of the most effective water-saving irrigation technologies, is being gradually promoted and applied in various irrigation areas along the Yellow River. However, the Yellow River has a high content of cement and sediment, with a high proportion of fine-grained sediment (high clay content and large specific surface area). The narrow design of the emitters' flow channels makes them prone to sediment deposition and accumulation, leading to clogging. Clogging not only directly affects the normal operation of the irrigation system but also significantly reduces its service life and efficiency.

[0003] Currently, most Yellow River water diversion drip irrigation systems employ a staged treatment model of "sedimentation in a sedimentation tank - sand trapping through a filter." Standards require that the particle size of the Yellow River water treated at the headwaters must be below 125μm (120 mesh) before being sent to the fields for drip irrigation. Existing technologies include, for example, Chinese patent CN215122847U, which discloses an anti-clogging drip irrigation system for Yellow River irrigation areas, including a primary sedimentation tank, a clear water tank, a return water structure, and a drip irrigation system. Another example is Chinese patent CN119385043A, which discloses a method and control system for preventing clogging of intelligent pressure-regulating drippers in Yellow River drip irrigation. However, existing technologies still have the following shortcomings: First, sedimentation tanks require a large area and involve high investment. Drip irrigation systems using Yellow River water diversion typically employ large sedimentation tanks for pretreatment, occupying an area that is usually 0.3% to 0.6% of the designed irrigated area. In high-standard farmland development areas, land resources for constructing large-scale sedimentation tanks are often scarce. The high cost of dredging and construction severely restricts the large-scale promotion of drip irrigation technology.

[0004] Secondly, existing filtration systems are energy-intensive and prone to clogging. Traditional filters (sand filters + mesh filters) have high head losses and place high demands on the water supply pumps. Faced with the problems of large particle size variations and strong water quality fluctuations in the Yellow River water source, they suffer from low filtration efficiency, easy clogging of the filter screens, and frequent maintenance. Fixed filter screens gradually accumulate impurities over long-term use, resulting in a continuous decline in filtration efficiency, requiring regular manual cleaning or backwashing during system shutdown.

[0005] Third, excessive filtration standards and high costs exist. Existing drip irrigation systems have extremely stringent requirements for water quality entering the field (<125μm), while in actual production, when using disposable drip irrigation tape for annual crops, the requirements are even higher for particles smaller than 200μm and a sand content of 4kg / m³. 3 Under these conditions, the flow rate of the irrigation device decreases by less than 20% during the single crop growth period. Treating water to below 125μm results in over-filtration, significantly increasing water treatment costs.

[0006] Fourth, there is a lack of systematic, multi-level, coordinated anti-clogging solutions. Existing technologies are mostly limited to a single anti-clogging approach at the "filter end," failing to design filtration, sand removal, and water injection terminal sand removal as a cohesive system. Although some studies have proposed a step-by-step sediment control concept of "sedimentation in sedimentation tank - sand interception by filter - capillary flushing - sand removal by water injection," a complete set of engineering-implementable devices has not yet been developed.

[0007] To address the aforementioned issues, it is necessary to develop an anti-clogging filtration irrigation system for drip irrigation using Yellow River diversion, integrating hydraulic vortex pre-separation, dynamic membrane fine filtration, vortex sand removal from the emitter, and intelligent dynamic control. Summary of the Invention

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide an anti-clogging filtration irrigation system for Yellow River drip irrigation. It aims to solve the technical problems of high filtration costs, easy clogging of filtration devices and water emitters caused by the high content of cement and sand and the large proportion of fine particles in the Yellow River drip irrigation process, and to achieve a technological leap from "ultimate filtration" to "system anti-clogging".

[0009] To achieve the above objectives, the present invention adopts the following technical solution: An innovative anti-clogging filter irrigation system for drip irrigation using Yellow River diversion includes a swirl pre-separation unit, a dynamic membrane filtration unit, and a drip irrigation network unit arranged sequentially along the water flow direction.

[0010] The cyclone pre-separation unit includes a hydrocyclone shell, which has a tangential inlet, a clear water outlet, and a sand discharge outlet. The inner cavity of the hydrocyclone shell has an upper cylindrical and lower conical structure, and a sand discharge valve is provided at the sand discharge outlet. The tangential inlet is used to allow sand-laden water to enter the interior of the hydrocyclone shell at a tangential velocity, forming a cyclone. Under the action of centrifugal force, the silt particles are thrown towards the wall and slide down the cone and are discharged through the sand discharge outlet. Fine particles flow out with the clear water from the top clear water outlet.

[0011] The dynamic membrane filtration unit includes a filter housing and a dynamic rotating membrane assembly disposed inside the filter housing. The inlet of the filter housing is connected to the clean water outlet. The dynamic rotating membrane assembly includes a membrane cylinder and a filter membrane disposed on the surface of the membrane cylinder, as well as a drive mechanism for rotating the membrane cylinder. The membrane cylinder has a clean water outlet. A cleaning element for cleaning the surface of the filter membrane is provided inside the filter housing. The filter housing has a drain port with a drain valve.

[0012] One end of the membrane tube is closed, and the other end is open, with the open end forming the purified water outlet. The output end of the drive mechanism is connected to the closed end of the membrane tube. The cleaning element is fixedly disposed on the inner wall of the filter housing, and there is a gap between the cleaning element and the surface of the filter membrane. When the membrane tube rotates, the cleaning element and the surface of the filter membrane generate relative motion.

[0013] The filter membrane is wrapped around the outer surface of the membrane tube, and water flows from inside the filter housing through the filter membrane into the membrane tube.

[0014] The drip irrigation network unit includes a main pipe, branch pipes, and several emitters. The main pipe is connected to the clean water outlet of the membrane cylinder. Multiple branch pipes are provided, each connected to the main pipe. The emitters are mounted on capillary tubes at the ends of the branch pipes. Each emitter has a sand discharge channel inside.

[0015] Furthermore, the sand discharge channel is a vortex sand discharge channel, which includes an inlet chamber, a vortex chamber, and an outlet chamber connected in sequence. The vortex chamber is equipped with a vortex structure unit, which includes a water divider for diverting and guiding the water flow to form a vortex. The vortex structure unit also includes guide walls disposed on both sides of the water divider.

[0016] Furthermore, the filtration accuracy of the filter membrane is 150~200μm.

[0017] Furthermore, it also includes an intelligent control unit, which comprises a controller and a detection component electrically connected to the controller. The signal output terminal of the controller is electrically connected to at least one of the sand discharge valve, the sewage discharge valve, and the drive mechanism. The controller has a built-in tiered filtration strategy, and matches the corresponding filtration strategy according to the detection data from the detection component, and controls the operating parameters of the dynamic membrane filtration unit.

[0018] Furthermore, the detection component includes at least one of the following: a sediment concentration sensor for detecting the sediment concentration in the effluent of the cyclone pre-separation unit, a particle size sensor for detecting the sediment particle size in the effluent of the cyclone pre-separation unit, and a differential pressure sensor disposed at the inlet and / or outlet of the dynamic membrane filtration unit.

[0019] Furthermore, the controller is also connected to a predictive backwashing module, which predicts clogging trends based on historical data from the detection component and initiates the backwashing procedure before clogging conditions are met.

[0020] Compared with the prior art, the present invention has the following beneficial effects: 1. Constructing a "Four-Level Collaborative" Anti-Clogging System Architecture. This invention breaks through the limitations of existing technologies that rely solely on "single-stage anti-clogging at the filter end," establishing a four-level collaborative anti-clogging system consisting of "cyclone pre-separation - dynamic membrane filtration - emitter vortex sand removal - intelligent dynamic control (end-to-end optimization)." Each unit forms a synergistic effect rather than simple superposition: cyclone pre-separation handles coarse particle removal, significantly reducing the load on the dynamic membrane filtration; dynamic membrane filtration handles fine interception, ensuring that the water quality entering the drip irrigation network meets the requirements for disposable drip irrigation tape; the emitter vortex sand removal channel actively discharges fine particles during irrigation. This three-level collaboration significantly reduces the filter backwashing frequency compared to traditional solutions, resulting in a significant decrease in emitter clogging rate.

[0021] 2. Overcoming the technical bias of "ultimate filtration". Traditional solutions require effluent particle size <125μm, resulting in severe over-filtration. This invention takes the opposite approach - relaxing the precision of the first-stage filtration to 150-200μm (allowing fine particles to enter), but allowing fine particles to "enter and exit" through the vortex sand discharge channel of the water injector. This technical approach contradicts the existing technical teaching that "the finer the filtration, the better," representing a typical case of innovation.

[0022] 3. Synergistic effect of cyclone and dynamic membrane. Cyclone pre-separation utilizes centrifugal force to achieve coarse particle separation without consumables; the dynamic rotating membrane continuously renews its filter surface during rotation, and combined with the shearing and scouring of the fixed cleaning element, impurities are difficult to adhere to. The combination of the two produces a "1+1>2" effect: the cyclone section reduces the membrane load, the dynamic membrane ensures the quality of the effluent, and hydraulic self-drive or low-power electric drive achieves low-energy operation.

[0023] 4. Significantly reduces land occupation and investment. Both the cyclone pre-separation unit and the dynamic membrane filtration unit are compact vertical devices, occupying a much smaller area than traditional grit chambers. The modular design allows for flexible arrangement as needed, making it suitable for land-constrained scenarios such as high-standard farmland and built-up areas.

[0024] 5. Intelligent dynamic control enables on-demand filtration. A filtration load index is constructed based on two parameters: sediment concentration and particle size. The filtration strategy is dynamically switched according to water quality (light filtration when water quality is good, heavy filtration when water quality is poor). Predictive backwashing initiates preventative flushing before clogging occurs, achieving a leap from "passive response" to "active prediction." Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of an anti-clogging filter irrigation system for drip irrigation using Yellow River diversion according to the present invention; Figure 2 This is a schematic diagram of the cyclone pre-separation unit of the present invention; Figure 3 This is a cross-sectional structural diagram of the dynamic membrane filtration unit of the present invention; Figure 4 This is a schematic diagram of the structure of the watering device of the present invention; Figure 5 This is a schematic block diagram of the intelligent control unit of the present invention; Figure 6 This is a flowchart illustrating the workflow of the filter load index model and hierarchical filter strategy library of this invention.

[0026] Explanation of the markings in the attached diagram: 1-Cyclone separator housing; 11-Tangential inlet; 12-Clear water outlet; 13-Sand discharge port; 14-Sand discharge valve; 2-Filter housing; 21-Membrane cylinder; 22-Filter membrane; 23-Drive mechanism; 24-Drain outlet; 25-Drain valve; 26-Cleaning element; 3-Connecting pipe; 4-Irrigator; 41-Inlet chamber; 42-Vortex chamber; 421-Water distributor; 422-Guide wall; 43-Outlet chamber; 5-Main pipe; 6-Branch pipe; 7-Controller; 71-Sediment concentration sensor; 72-Particle size sensor; 73-First differential pressure sensor; 74-Second differential pressure sensor; 75-Flow sensor; 76-Wireless communication module; 8-Outlet pipe. Detailed Implementation

[0027] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example 1 like Figure 1 As shown, a clog-resistant filtration irrigation system for drip irrigation using Yellow River water diversion includes a swirl pre-separation unit, a dynamic membrane filtration unit, an intelligent control unit, and a drip irrigation network unit arranged sequentially along the water flow direction.

[0029] (a) Cyclone pre-separation unit As shown in Figure 2, the hydrocyclone pre-separation unit includes a hydrocyclone shell 1. The upper part of the hydrocyclone shell 1 has a tangential inlet 11, the top has a clear water outlet 12, and the bottom has a sand discharge outlet 13. The inner cavity of the hydrocyclone shell 1 has an upper cylindrical and lower conical structure with a cone angle of 15°. The tangential inlet 11 allows sand-laden water to enter the hydrocyclone shell at a tangential velocity of 8 m / s, forming a high-speed vortex. Under the action of the vortex, sediment particles larger than 50 μm are thrown towards the wall by centrifugal force and slide down the cone, exiting through the sand discharge outlet 13. A sand discharge valve 14 is installed at the sand discharge outlet 13. After hydrocyclone pre-separation, the removal rate of particles larger than 50 μm is greater than or equal to 85%. The sand discharge outlet 13 is connected to the field irrigation system through a sand discharge pipe, and the discharged water is used for field irrigation, realizing the resource utilization of sediment.

[0030] (ii) Dynamic membrane filtration unit like Figure 3 As shown, the dynamic membrane filtration unit includes a filter housing 2 and a dynamic rotating membrane assembly disposed inside the filter housing 2. The inlet of the filter housing 2 is connected to the clean water outlet 12 of the cyclone pre-separation unit via a connecting pipe 3.

[0031] The dynamic rotating membrane assembly includes a hollow membrane cylinder 21, a filter membrane 22 wrapped around the outer surface of the membrane cylinder 21, and a drive mechanism 23 for rotating the membrane cylinder 21. One end of the membrane cylinder 21 has a sealing end cap forming a closed end, located away from the outlet pipe 8; the other end of the membrane cylinder 21 is open, forming a purified water outlet, located near the outlet pipe 8, and connected to the outlet pipe 8 via a rotary sealing joint. The drive mechanism 23 is located outside the filter housing 2, and its output shaft passes through the end wall of the filter housing 2 and is fixedly connected to the end cap of the closed end of the membrane cylinder 21, driving the membrane cylinder 21 to rotate around its axis. The filtration accuracy of the membrane cylinder 21 is 180 μm. The membrane cylinder 21 rotates continuously at a speed of 15 r / min under the drive of the drive mechanism 23; in this embodiment, the drive mechanism 23 is a rotary motor.

[0032] Several axially extending cleaning elements 26 are fixedly installed on the inner wall of the filter housing 2. A 1mm gap is maintained between the scraper blades of the cleaning elements 26 and the filter membrane 22 on the outer surface of the membrane cylinder 21. When the membrane cylinder 21 rotates, the fixed cleaning elements 26 and the rotating surface of the filter membrane 22 generate relative motion (relative speed approximately 0.5–1.5 m / s). The resulting fluid shear force continuously peels away fine particles of sediment attempting to adhere to the membrane surface, suspending them in the water. The filter membrane 22 is made of stainless steel woven mesh.

[0033] The bottom of the filter housing 2 is provided with a drain port 24, and a drain valve 25 is provided at the drain port 24. The stripped silt settles at the bottom of the filter housing 2 and is periodically discharged through the drain port 24. The drive mechanism 23 is a hydraulic self-driven mechanism that uses the kinetic energy of water to drive the membrane cylinder to rotate, without the need for an external power source.

[0034] The dynamic membrane filtration unit operates as follows: Water pretreated by cyclone filtration enters the filter housing 2 and, under pressure, passes through the filter membrane 22 from the outside to the inside, entering the membrane cylinder 21. Sand particles larger than 180 μm are trapped on the outer surface of the membrane cylinder 21. Simultaneously, the drive mechanism 23 rotates the membrane cylinder 21, and the fixed cleaning element 26 moves relative to the rotating outer surface of the membrane cylinder 21, continuously peeling away the sand particles adhering to the outer surface of the filter membrane 22. The clean water that passes through the filter membrane 22 and enters the membrane cylinder 21 is then sent to the drip irrigation network through the purified water outlet. After dynamic membrane filtration, the interception rate of particles larger than 180 μm is greater than or equal to 95%.

[0035] (III) Drip Irrigation Network Unit The drip irrigation network unit includes a main pipe 5, branch pipes 6, and several emitters 4. The inlet end of the main pipe 5 is connected to the clean water outlet of the membrane cylinder 21 through the outlet pipe 8. The main pipe 5 is laid along the main direction of the irrigation area and serves as the backbone water delivery pipeline. There are multiple branch pipes 6, and the inlet end of each branch pipe 6 is connected to the side wall of the main pipe 5. The branch pipes 6 are laid perpendicular to the direction of the main pipe 5 or along the direction of crop planting rows. Each branch pipe 6 is connected to a capillary tube, and several emitters 4 are installed on the capillary tube.

[0036] The clean water treated by the dynamic membrane filtration unit enters the main pipe 5 from the clean water outlet of the membrane cylinder 21 through the water outlet pipe 8, and is then distributed to each branch pipe 6 by the main pipe 5, and finally drip irrigation is implemented through the water emitter 4 on the capillary tube.

[0037] like Figure 4 As shown, the irrigation emitter 4 has a vortex sand-discharging channel inside, which includes an inlet chamber 41, a vortex chamber 42, and an outlet chamber 43 connected in sequence. The vortex chamber 42 contains multiple vortex structure units connected in series. Each vortex structure unit includes a water divider 421 and guide walls 422 located on both sides of the water divider 421. The water-facing side of the water divider 421 is an arc-shaped flow-dividing surface, and the radius of curvature of the guide walls 422 gradually decreases along the water flow direction. When the water flows through the water divider 421, it is divided into two streams, forming local vortices under the guidance of the guide walls 422. The centrifugal force of the vortex throws the fine particles of sediment entering the irrigation emitter 4 towards the channel sidewalls and discharges them with the water flow from the outlet chamber 43, rather than depositing them in the channel. After treatment by the vortex sand-discharging channel, most of the fine particles entering the irrigation emitter are actively discharged during irrigation.

[0038] (iv) Intelligent control unit like Figure 5 As shown, the intelligent control unit includes a controller 7, a sediment concentration sensor 71, a particle size sensor 72, a first differential pressure sensor 73, a second differential pressure sensor 74, and a flow sensor 75. The sediment concentration sensor 71 and particle size sensor 72 are located at the clear water outlet 12 of the cyclone pre-separation unit to monitor the effluent quality after cyclone treatment in real time. The first differential pressure sensor 73 is located at the inlet of the dynamic membrane filtration unit, and the second differential pressure sensor 74 is located at the outlet of the dynamic membrane filtration unit. The flow sensor 75 is located on the main pipe 5 of the drip irrigation network unit. The signal input terminal of the controller 7 is electrically connected to each sensor, and the signal output terminal is electrically connected to the sand discharge valve 14, the sewage discharge valve 25, and the drive mechanism 23.

[0039] Controller 7 is a programmable logic controller (PLC) with a built-in tiered filtration strategy. This strategy includes three approaches: a light filtration strategy (reducing membrane speed and extending backwashing cycles for energy-efficient operation when sediment concentration is low), a standard filtration strategy (maintaining design parameters when sediment concentration is moderate), and an enhanced filtration strategy (increasing membrane speed and shortening backwashing cycles to ensure effluent quality when sediment concentration is high). Controller 7 automatically matches and executes the appropriate filtration strategy based on the detected data.

[0040] The controller 7 is also connected to a predictive backwashing module. This module establishes a pressure difference change trend model based on historical data from the first differential pressure sensor 73 and the second differential pressure sensor 74. When it is predicted that the pressure difference will reach the blockage threshold within a preset time, the backwashing program is started in advance.

[0041] The controller 7 is also connected to a wireless communication module 76, which communicates with a remote monitoring terminal. Managers can view the system's operating status in real time, receive alarm information, and perform remote control through the remote terminal.

[0042] Working principle The working principle of this invention is as follows: The sediment-laden water from the Yellow River enters the hydrocyclone shell 1 of the hydrocyclone pre-separation unit tangentially through the tangential inlet 11. During high-speed rotation, centrifugal force is generated, throwing coarse sediment particles against the wall and sliding down the cone to the bottom, where they are discharged through the discharge outlet 13. The discharged water is then piped to fields for irrigation, realizing the resource utilization of sediment. The purified water, after hydrocyclone treatment, flows out from the top purified water outlet 12 and enters the dynamic membrane filtration unit via the connecting pipe 3.

[0043] In the dynamic membrane filtration unit, water flows into the filter housing 2 and, under pressure, passes through the filter membrane 22 on the surface of the rotating membrane cylinder 21 from the outside in. Coarse particles are trapped on the outer surface of the membrane cylinder 21. Driven by the drive mechanism 23, the membrane cylinder 21 rotates continuously. The cleaning element 26, fixed to the inner wall of the filter housing 2, moves relative to the rotating surface of the filter membrane 22, continuously peeling off impurities adhering to the outer surface of the filter membrane. The peeled impurities settle to the bottom and are periodically discharged through the drain port 24. The clean water that passes through the filter membrane and enters the membrane cylinder flows into the drip irrigation network through the clean water outlet.

[0044] After two stages of treatment, the clean water enters the main pipe 5 of the drip irrigation network unit through the outlet pipe 8. From there, it is distributed to the branch pipes 6 and finally reaches the emitters 4 on the capillary tubes. After entering the inlet chamber 41 of the emitter 4, the water flows through a multi-stage vortex structure unit within the vortex chamber 42. In each vortex structure unit, the water flow is divided into two streams by the water distribution body 421, forming a local vortex under the guidance of the guide wall 422. The centrifugal force of the vortex throws fine particles of sediment against the side wall and discharges them from the outlet chamber 43 with the water flow, achieving active sand removal and anti-clogging at the emitter level.

[0045] Throughout the operation, the intelligent control unit continuously monitors water quality parameters and filtration status. Sediment concentration sensor 71 and particle size sensor 72 detect the effluent quality after cyclone treatment in real time; first differential pressure sensor 73 and second differential pressure sensor 74 monitor the pressure difference across the membrane cylinder in real time. The controller 7 dynamically adjusts operating parameters based on this data and initiates backwashing in advance when a clogging risk is predicted.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A clog-resistant filter irrigation system for drip irrigation using water diverted from the Yellow River, characterized in that, It includes a swirl pre-separation unit, a dynamic membrane filtration unit, and a drip irrigation network unit arranged sequentially along the water flow direction; The cyclone pre-separation unit includes a hydrocyclone shell (1), which is provided with a tangential water inlet (11), a clean water outlet (12) and a sand discharge port (13). The inner cavity of the hydrocyclone shell (1) has an upper cylindrical and lower conical structure, and a sand discharge valve (14) is provided at the sand discharge port (13). The dynamic membrane filtration unit includes a filter housing (2) and a dynamic rotating membrane assembly disposed inside the filter housing (2); the inlet of the filter housing (2) is connected to the clean water outlet (12); the dynamic rotating membrane assembly includes a membrane cylinder (21) and a filter membrane (22) disposed on the surface of the membrane cylinder (21), and a drive mechanism (23) for driving the membrane cylinder (21) to rotate; the membrane cylinder (21) is provided with a clean water outlet; the filter housing (2) is provided with a cleaning element (26) for cleaning the surface of the filter membrane (22); the filter housing (2) is provided with a drain port (24), and a drain valve (25) is provided at the drain port (24); The drip irrigation network unit includes a main pipe (5), branch pipes (6) and several water emitters (4); the main pipe (5) is connected to the clean water outlet of the membrane cylinder (21); there are multiple branch pipes (6), each branch pipe (6) is connected to the main pipe (5); the water emitter (4) is set on the capillary tube at the end of the branch pipe (6); the water emitter (4) is provided with a sand discharge channel inside.

2. The anti-clogging filter irrigation system for Yellow River drip irrigation according to claim 1, characterized in that, The cleaning element (26) is fixedly disposed on the inner wall of the filter housing (2). There is a gap between the cleaning element (26) and the surface of the filter membrane (22). When the membrane cylinder (21) rotates, the cleaning element (26) and the surface of the filter membrane (22) generate relative motion.

3. The anti-clogging filter irrigation system for Yellow River drip irrigation according to claim 1, characterized in that, One end of the membrane tube (21) is closed and the other end is open, with the open end forming the purified water outlet. The output end of the drive mechanism (23) is connected to the closed end of the membrane tube (21).

4. The anti-clogging filter irrigation system for Yellow River drip irrigation according to claim 1, characterized in that, The filter membrane (22) is wrapped around the outer surface of the membrane tube (21), and the water flows through the filter membrane (22) from the inside of the filter housing (2) into the inside of the membrane tube (21).

5. The anti-clogging filter irrigation system for Yellow River drip irrigation according to claim 1, characterized in that, The sand discharge channel is a vortex sand discharge channel, which includes an inlet chamber (41), a vortex chamber (42), and an outlet chamber (43) connected in sequence. The vortex chamber (42) is provided with a vortex structure unit, which includes a water divider (421). The water divider (421) is used to divide the water flow and guide it to form a vortex.

6. The anti-clogging filter irrigation system for Yellow River drip irrigation according to claim 5, characterized in that, The vortex structure unit also includes guide walls (422) disposed on both sides of the water divider (421).

7. The anti-clogging filter irrigation system for Yellow River drip irrigation according to claim 1, characterized in that, The filtration accuracy of the filter membrane (22) is 150-200 μm.

8. The anti-clogging filter irrigation system for Yellow River drip irrigation according to claim 1, characterized in that, It also includes an intelligent control unit, which includes a controller (7) and a detection component electrically connected to the controller (7); the signal output terminal of the controller (7) is electrically connected to at least one of the sand discharge valve (14), the sewage discharge valve (25) and the drive mechanism (23); the controller (7) has a built-in graded filtration strategy, and the controller (7) matches the corresponding filtration strategy according to the detection data of the detection component and controls the operating parameters of the dynamic membrane filtration unit.

9. The anti-clogging filter irrigation system for Yellow River drip irrigation according to claim 8, characterized in that, The detection component includes at least one of the following sensors: A sediment concentration sensor (71) for detecting the sediment concentration in the effluent of the cyclone pre-separation unit. A particle size sensor (72) is used to detect the particle size of sediment in the effluent of the cyclone pre-separation unit. The first differential pressure sensor (73) is installed at the inlet of the dynamic membrane filtration unit. The second differential pressure sensor (74) is installed at the outlet of the dynamic membrane filtration unit.

10. The anti-clogging filter irrigation system for Yellow River drip irrigation according to claim 8, characterized in that, The controller (7) is also connected to a predictive backwashing module, which predicts the clogging trend based on the historical data of the detection component and starts the backwashing procedure before the clogging condition is reached.

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