A raw water pretreatment system and a pretreatment method

Abstract

The present invention provides a raw water pretreatment system, which includes a flocculation zone, a plug flow zone, a sedimentation zone and a filtration zone, and the flocculation zone, the plug flow zone, the sedimentation zone and the filtration zone are connected in sequence; the sedimentation zone includes a sedimentation tank, a sediment discharge device and a sediment discharge auxiliary device, the sediment discharge device is located at the bottom of the sedimentation tank, the sediment discharge auxiliary device is located inside the sedimentation tank, and the bottom inside the sedimentation tank is of a hopper-shaped structure; the sediment discharge auxiliary device includes a placement cavity, a connection cavity, a rotary motor, a roller, several sliding rods, a moving block, several springs, several connecting rods, a connection block and a separator, the placement cavity is located at the top inside the sedimentation tank, and the placement cavity is connected to the sedimentation tank. By setting the display board of the separator, the present invention effectively separates the bottom of the sedimentation tank from the upper part during the sediment discharge process, avoids the resuspension and disturbance of the sediment caused by the water flow or the discharge operation, and makes the sediment discharge more sufficient.

Description

Technical Field

[0001] The present invention relates to the technical field of raw water pretreatment, and particularly relates to a raw water pretreatment system and a pretreatment method. Background Art

[0002] Raw water pretreatment is a key link in the water treatment process, mainly including stages such as flocculation, sedimentation, and filtration. Among them, the sedimentation stage removes suspended solids and solid particles in water through a sedimentation tank. However, existing raw water pretreatment methods usually rely on static sedimentation tanks, manual or mechanical cleaning methods for sediment discharge. When discharging sediment, the sediment at the bottom of the tank is often easily disturbed, resulting in the sediment floating up again or not being completely discharged. This phenomenon not only affects the sediment removal effect but also may cause secondary pollution, further reducing the water treatment efficiency. Summary of the Invention

[0003] Based on the above background, the purpose of the present invention is to provide a raw water pretreatment system and a pretreatment method that prevent the disturbance of sediment at the bottom of the sedimentation tank and avoid the sediment floating up again or not being completely discharged, so as to solve the problems described in the background art.

[0004] To achieve the above invention purpose, the present invention provides the following technical solutions:

[0005] A raw water pretreatment system includes a flocculation zone, a push flow zone, a sedimentation zone, and a filtration zone, which are sequentially connected in series;

[0006] The sedimentation zone includes a sedimentation tank, a sediment discharge device, and a sediment discharge auxiliary device. The sediment discharge device is located at the bottom of the sedimentation tank, the sediment discharge auxiliary device is located inside the sedimentation tank, and the bottom of the inner side of the sedimentation tank is a funnel-shaped structure;

[0007] The sediment discharge auxiliary device includes a placement cavity, a connection cavity, a rotating motor, a roller, a plurality of sliding rods, a moving block, a plurality of springs, a plurality of connecting rods, a connection block, and a separator. The placement cavity is located at the top of the inner side of the sedimentation tank, the placement cavity is connected to the sedimentation tank, the connection cavity is located at the bottom of the placement cavity, and the connection cavity is communicated with the placement cavity;

[0008] The rotating motor is located inside the placement cavity, the rotating motor is connected to the placement cavity, and the roller, the plurality of sliding rods, the moving block, and the plurality of springs are all located inside the connection cavity;

[0009] One end of the roller is connected to the rotating end of the rotating motor; a spiral-shaped chute is provided on the surface of the roller, a slider is provided on the moving block, the slider corresponds to the chute, the slider is connected to the moving block, and the moving block and the roller are slidably matched through the slider and the chute;

[0010] A number of the sliding rods are circumferentially distributed on the outer side of the rotating roller. Both ends of the sliding rods are connected to the connection cavity. A number of openings are formed on the outer edge of the moving block, and the openings correspond to the sliding rods one by one. The moving block is slidably matched with the sliding rods through the openings;

[0011] A number of springs are arranged on the upper part of the moving block, and the springs correspond to the sliding rods one by one. The springs are sleeved outside the sliding rods, and both ends of the springs are respectively connected to the moving block and the connection cavity;

[0012] A number of connecting rods are arranged on the lower part of the moving block. The top of the connecting rod is connected to the moving block, the bottom of the connecting rod is connected to the connecting block, and a connection isolation member is arranged on the side of the connecting block away from the connecting rod. The isolation member has two states of expansion and retraction.

[0013] Preferably, the isolation member includes a number of frames, elastic members and a number of display boards. The number of the frames are circumferentially distributed at equal intervals at the bottom of the connecting block. The frames are hinged to the connecting block, and elastic members are arranged between the frames and the connecting block. The elastic members are located on the side of the frames away from the middle of the connecting block, and both ends of the elastic members are respectively connected to the frames and the connecting block. Display boards are arranged between adjacent frames, and the display boards are connected to the frames.

[0014] Preferably, the flocculation area includes a flocculation tank and a stirring device. The stirring device is located inside the flocculation tank, and the stirring device is connected to the flocculation tank;

[0015] The pushing flow area includes a pushing flow box and a snake-shaped arranged pushing flow channel. The pushing flow channel is located inside the pushing flow box, and the pushing flow channel is connected to the pushing flow box;

[0016] The filtering area includes a filtering tank and a number of filter plates. The filter plates are located inside the filtering tank, and the filter plates are connected to the filtering tank.

[0017] Preferably, the sediment discharge device includes a pump body and a discharge channel. The inlet end of the pump body is communicated with the bottom of the sedimentation tank, and the outlet end of the pump body is communicated with the discharge pipe.

[0018] Preferably, a sealing plate is arranged between the placement cavity and the connection cavity.

[0019] Preferably, a number of the sliding grooves are circumferentially distributed at equal intervals on the surface of the rotating roller.

[0020] Preferably, the number of the sliding rods is at least two.

[0021] A raw water pretreatment method includes:

[0022] S1. Introduce raw water into the flocculation tank in the flocculation area, and under the action of the stirring device, use a flocculant to perform flocculation treatment on suspended substances in the water;

[0023] S2. The raw water after flocculation treatment flows into the plug-flow zone, and the plug-flow channels arranged in a snake shape in the plug-flow box uniformly push the raw water flow to ensure that the raw water does not interfere with the sediment in the sedimentation tank when entering the sedimentation zone;

[0024] S3. The raw water enters the sedimentation tank, and the sediment gradually settles to the bottom of the sedimentation tank under the action of gravity;

[0025] S4. When the sediment settles to a set amount, the rotary motor in the sediment discharge auxiliary device drives the roller, and the spiral chute on the surface of the roller guides the moving block to move downward, indirectly pushing the connecting rod and the connecting block downward. During the movement of the connecting block, the frame of the isolation member slowly leaves the connecting cavity from bottom to top, and under the action of the elastic member, the frame extends outward, and the display board between the frames unfolds, separating the bottom of the sedimentation tank from the upper part;

[0026] S5. Start the sediment discharge device at the bottom of the sedimentation tank, and discharge the sediment out of the system through the pump body and the discharge channel;

[0027] S6. While the sediment is being discharged, the display board continues to move downward until it is close to the bottom surface of the sedimentation tank, waiting for the sediment to be completely discharged;

[0028] S7. After the sediment is discharged, the rotary motor drives the roller in the reverse direction, and the spiral chute on the surface of the roller guides the moving block to move upward, indirectly pulling the connecting rod and the connecting block upward. During the movement of the connecting block, the frame of the isolation member slowly enters the connecting cavity from top to bottom, and the display board between the frames is retracted;

[0029] S8. The water flow after sedimentation treatment enters the filtration zone, and the filter plate in the filter tank filters out the remaining suspended solids in the water.

[0030] Compared with the prior art, the present invention has the following advantages:

[0031] Through the design of the display board of the isolation member, the present invention effectively separates the bottom of the sedimentation tank from the upper part during the sediment discharge process, avoiding the resuspension and disturbance of the sediment caused by the water flow or the discharge operation, and making the sediment discharge more sufficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0033] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0034] Figure 2 This is a schematic structural diagram of the sediment discharge assisting device of the present invention.

[0035] In the figure: 101, flocculation tank; 102, stirring device; 201, push flow box; 202, push flow channel; 301, sedimentation tank; 302, sediment discharge device; 302-1, pump body; 302-2, discharge channel; 303, sediment discharge assisting device; 303-1, placement cavity; 303-2, connection cavity; 303-3, rotating motor; 303-4, roller; 303-5, sliding rod; 303-6, moving block; 303-7, spring; 303-8, connecting rod; 303-9, connecting block; 303-10, isolation member; 303-10-1, frame body; 303-10-2, elastic member; 303-10-3, display board; 401, filtration tank; 402, filter plate. Specific embodiments

[0036] The technical solution of the present invention will be further specifically described below through specific embodiments in conjunction with the accompanying drawings. It should be understood that the implementation of the present invention is not limited to the following embodiments, and any formal modification and / or change made to the present invention will fall within the protection scope of the present invention.

[0037] In the present invention, unless otherwise specified, all parts and percentages are in weight units, and the equipment and raw materials used can be purchased from the market or are commonly used in the art. The methods in the following embodiments are conventional methods in the art unless otherwise specified. The components or equipment in the following embodiments are general standard parts or components known to those skilled in the art, and their structures and principles can all be known through technical manuals or obtained through conventional experimental methods by those skilled in the art.

[0038] The following will make a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. In the following detailed description, for the convenience of explanation, many specific details are elaborated to provide a comprehensive understanding of the embodiments of the present invention. However, one or more embodiments can also be implemented by those skilled in the art without these specific details.

[0039] As Figure 1 shown, a raw water pretreatment system includes a flocculation zone, a push flow zone, a sedimentation zone, and a filtration zone, and the flocculation zone, the push flow zone, the sedimentation zone, and the filtration zone are connected in sequence.

[0040] During the pretreatment of raw water, it passes through the flocculation zone, the push flow zone, the sedimentation zone, and the filtration zone respectively.

[0041] The flocculation zone includes a flocculation tank 101 and a stirring device 102. The stirring device 102 is located inside the flocculation tank 101, and the stirring device 102 is connected to the flocculation tank 101.

[0042] In the flocculation zone, the stirring device 102 evenly disperses the flocculant into the water by continuously agitating the water body in the flocculation tank 101, ensuring that the flocculant is in full contact with the suspended particles and colloidal substances in the water. Under the action of agitation, the fine particles in the water gradually aggregate into larger flocs with a faster sedimentation rate. Among them, the rotation speed and stirring time of the stirring device 102 are set to be adjustable, so as to achieve precise control of the flocculation process, ensure that the reaction between the particulate matter and the flocculant reaches the best effect, prevent insufficient stirring, incomplete reaction between the flocculant and the particulate matter, resulting in insufficient formation of flocs and affecting the water purification effect, or over-stirring causing the formed flocs to be broken up and resulting in secondary suspension.

[0043] The push-flow zone includes a push-flow box 201 and a serpentine push-flow channel 202. The push-flow channel 202 is located inside the push-flow box 201 and is connected to the push-flow box 201.

[0044] The push-flow channels 202 in the push-flow box 201 are arranged in a serpentine manner, enabling the raw water flow to experience a certain degree of bending and speed change before entering the sedimentation zone from the flocculation zone, which helps to maintain the uniformity of the raw water flow, reduce the impact force when the raw water enters the sedimentation tank 301, and reduce the interference of the water flow on the sediment in the sedimentation tank 301, preventing the sediment from being disturbed or resuspended.

[0045] The sedimentation zone includes a sedimentation tank 301, a sediment discharge device 302, and a sediment discharge auxiliary device 303. The sediment discharge device 302 is located at the bottom of the sedimentation tank 301, and the sediment discharge auxiliary device 303 is located inside the sedimentation tank 301. The bottom inside the sedimentation tank 301 is of a hopper-shaped structure.

[0046] The sediment discharge device 302 includes a pump body 302-1 and a discharge channel 302-2. The inlet end of the pump body 302-1 is communicated with the bottom of the sedimentation tank 301, and the outlet end of the pump body 302-1 is communicated with a discharge pipe.

[0047] When the water flow enters the sedimentation tank 301, the solid particles in the water gradually settle to the bottom of the tank under the action of gravity. The hopper-shaped structure at the bottom of the sedimentation tank 301 helps to concentrate the sediment and guide it to converge at the inlet of the sediment discharge device 302. Among them, the sediment discharge device 302 consists of a pump body 302-1 and a discharge channel 302-2. The inlet end of the pump body 302-1 is communicated with the bottom of the sedimentation tank 301, and the outlet end of the pump body 302-1 is communicated with the outside of the system through a discharge pipe. Under the action of the pump body 302-1, the sediment accumulated at the bottom of the sedimentation tank 301 can be timely pumped out and discharged from the system.

[0048] Such as Figure 2As shown, the sediment discharge auxiliary device 303 includes a placement chamber 303-1, a connecting chamber 303-2, a rotating motor 303-3, a roller 303-4, several sliding rods 303-5, a moving block 303-6, several springs 303-7, several connecting rods 303-8, a connecting block 303-9 and an isolation member 303-10. The placement chamber 303-1 is located at the top of the inner side of the sedimentation tank 301, and the placement chamber 303-1 is connected to the sedimentation tank 301. The connecting chamber 303-2 is located at the bottom of the placement chamber 303-1, and the connecting chamber 303-2 is connected to the placement chamber 303-1.

[0049] The rotating motor 303-3 is located inside the placement chamber 303-1, and the rotating motor 303-3 is connected to the placement chamber 303-1. The roller 303-4, several sliding rods 303-5, the moving block 303-6 and several springs 303-7 are all located inside the connecting chamber 303-2. A sealing plate is set between the placement chamber 303-1 and the connecting chamber 303-2.

[0050] While discharging the sediment, the sediment discharge auxiliary device 303 will separate the bottom of the sedimentation tank 301 from the upper part of the sedimentation tank 301, avoiding the re-suspension and disturbance of the sediment caused by the water flow or the discharge operation, so that the sediment discharge is more sufficient. Among them, the placement chamber 303-1 of the sediment discharge auxiliary device 303 is located at the top of the inner side of the sedimentation tank 301 and is connected to the sedimentation tank 301, and can be used to place the rotating motor 303-3. The connecting chamber 303-2 is located at the bottom of the placement chamber 303-1 and is connected to the placement chamber 303-1, and can be used to place the roller 303-4, the sliding rod 303-5 and the moving block 303-6 and other components. A sealing plate is set between the placement chamber 303-1 and the connecting chamber 303-2, which can prevent the raw water in the sedimentation tank 301 from entering the placement chamber 303-1 and protect the rotating motor 303-3 inside it.

[0051] One end of the roller 303-4 is connected to the rotating end of the rotating motor 303-3. A spiral groove is provided on the surface of the roller 303-4, and several grooves are equidistantly distributed circumferentially on the surface of the roller 303-4. The moving block 303-6 is provided with a slider, the slider corresponds to the groove, the slider is connected to the moving block 303-6, and the moving block 303-6 and the roller 303-4 are slidably matched through the slider and the groove.

[0052] Several sliding rods 303-5 are distributed circumferentially on the outer side of the roller 303-4, and the number of sliding rods 303-5 is at least two. Both ends of the sliding rods 303-5 are connected to the connecting cavity 303-2. Several openings are provided on the outer edge of the moving block 303-6, and the openings correspond to the sliding rods 303-5 one by one. The moving block 303-6 slides and cooperates with the sliding rods 303-5 through the openings.

[0053] A plurality of springs 303-7 are arranged on the upper part of the moving block 303-6. The springs 303-7 correspond to the sliding rods 303-5 one by one. The springs 303-7 are sleeved on the outside of the sliding rods 303-5. The two ends of the springs 303-7 are respectively connected to the moving block 303-6 and the connecting cavity 303-2.

[0054] Several connecting rods 303-8 are set at the lower part of the moving block 303-6. The top of the connecting rod 303-8 is connected to the moving block 303-6, and the bottom of the connecting rod 303-8 is connected to the connecting block 303-9. A connecting isolation piece 303-10 is set on the side of the connecting block 303-9 away from the connecting rod 303-8. The isolation piece 303-10 has two states: unfolded and folded.

[0055] When the sediment discharge auxiliary device 303 is working, the power of the rotating motor 303-3 drives the roller 303-4 connected to it to rotate, so that the slider is pushed in the spiral groove on the surface of the roller 303-4. Since the slider is connected to the moving block 303-6, and several sliding rods 303-5 are evenly distributed on the outside of the roller 303-4, the moving block 303-6 on the sliding rod 303-5 slides with the sliding rod 303-5 through the opening, so that the moving block 303-6 can move in the up and down directions.

[0056] When the moving block 303-6 slowly pushes the connecting rod 303-8 downward, thereby indirectly pushing the connecting block 303-9 to move downward, until the connecting block 303-9 leaves the connecting cavity 303-2, the isolation piece 303-10 at the bottom of the connecting block 303-9 will slowly expand to separate the bottom of the sedimentation tank 301 from the upper part of the sedimentation tank 301. When the moving block 303-6 slowly pulls the connecting rod 303-8 upward, thereby indirectly pulling the connecting block 303-9 to move upward, until the connecting block 303-9 enters the connecting cavity 303-2, the isolation piece 303-10 at the bottom of the connecting block 303-9 will slowly retract to prevent blocking the bottom of the sedimentation tank 301 and preventing sediment from settling.

[0057] The isolation member 303-10 includes several frames 303-10-1, elastic components 303-10-2 and several display panels 303-10-3. The several frames 303-10-1 are circumferentially distributed at equal distances at the bottom of the connecting block 303-9. The frames 303-10-1 are hinged to the connecting block 303-9. The elastic components 303-10-2 are arranged between the frames 303-10-1 and the connecting block 303-9. The elastic components 303-10-2 are located on the side of the frames 303-10-1 away from the middle of the connecting block 303-9. The two ends of the elastic components 303-10-2 are respectively connected to the frames 303-10-1 and the connecting block 303-9. Display panels 303-10-3 are arranged between adjacent frames 303-10-1, and the display panels 303-10-3 are connected to the frames 303-10-1.

[0058] The connecting block 303-9 is connected to the frame 303-10-1 through the elastic component 303-10-2. When the connecting block 303-9 leaves the connecting cavity 303-2, the elastic component 303-10-2 provides a tensile force for the frame 303-10-1, prompting the frame 303-10-1 to expand outward. As the frame 303-10-1 expands, the display panels 303-10-3 between the frames 303-10-1 are also stretched open, thereby forming an isolation barrier. When the connecting block 303-9 returns to the connecting cavity 303-2, part of the frame 303-10-1 will also enter the connecting cavity 303-2, and the connecting cavity 303-2 will push the outside of the frame 303-10-1 to retract the frame 303-10-1. The display panels 303-10-3 between the frames 303-10-1 will also fold as the frames 303-10-1 are retracted, thereby returning to their original state.

[0059] The filtration area includes a filtration pool 401 and a plurality of filtration plates 402 . The filtration plates 402 are located inside the filtration pool 401 , and the filtration plates 402 are connected to the filtration pool 401 .

[0060] The raw water that has passed through the sedimentation area has had large particles of impurities removed, but may still contain relatively fine suspended matter and particles. These fine suspended matter and particles enter the filtration area along the channel. The filter pool 401 in the filtration area guides the water flow to be evenly distributed on multiple filter plates 402. The filter plates 402 intercept small particles and suspended matter in the water through their pores. In addition, the filter plates 402 are multi-layered, and each layer of the filter plates 402 has a structure with different pore sizes, which can grade and filter the water flow according to the size of the particles, increase the contact area between the water flow and the filter material, and effectively retain the particles.

[0061] A raw water pretreatment method, comprising:

[0062] S1, introducing raw water into the flocculation tank 101 in the flocculation area, and using a flocculant to flocculate the suspended matter in the water under the action of a stirring device 102;

[0063] S2, the raw water after flocculation treatment flows into the plug flow area, and the plug flow channels 202 arranged in a serpentine shape in the plug flow box 201 evenly push the raw water flow to ensure that the raw water does not interfere with the sediment in the sedimentation tank 301 when entering the sedimentation area;

[0064] S3, the raw water enters the sedimentation tank 301, and the sediment gradually settles to the bottom of the sedimentation tank 301 under the action of gravity;

[0065] S4. When the sediment has settled to a set amount, the rotary motor 303-3 in the sediment discharge auxiliary device 303 drives the roller 303-4. The spiral chute on the surface of the roller 303-4 guides the moving block 303-6 to move downward, indirectly pushing the connecting rod 303-8 and the connecting block 303-9 downward. During the movement of the connecting block 303-9, the frame 303-10-1 of the separator 303-10 slowly leaves the connecting cavity 303-2 from bottom to top. Under the action of the elastic member 303-10-2, the frame 303-10-1 extends outward, and the display board 303-10-3 between the frames 303-10-1 unfolds, separating the bottom of the sedimentation tank 301 from the upper part.

[0066] S5. Start the sediment discharge device 302 at the bottom of the sedimentation tank 301, and discharge the sediment out of the system through the pump body 302-1 and the discharge channel 302-2.

[0067] S6. While the sediment is being discharged, the display board 303-10-3 continues to move downward until it approaches the surface of the bottom of the sedimentation tank 301, waiting for the complete discharge of the sediment.

[0068] S7. After the sediment is completely discharged, the rotary motor 303-3 drives the roller 303-4 in the reverse direction. The spiral chute on the surface of the roller 303-4 guides the moving block 303-6 to move upward, indirectly pulling the connecting rod 303-8 and the connecting block 303-9 upward. During the movement of the connecting block 303-9, the frame 303-10-1 of the separator 303-10 slowly enters the connecting cavity 303-2 from top to bottom, and the display board 303-10-3 between the frames 303-10-1 retracts.

[0069] S8. The water flow after sedimentation treatment enters the filtration area, and the filter plate 402 in the filter tank 401 filters out the remaining suspended solids in the water.

[0070] The implementation principle of the raw water pretreatment system and pretreatment method of the present invention is as follows:

[0071] First, the raw water passes through the flocculation zone. With the help of the stirring device 102, the flocculant fully contacts the suspended particles in the water, causing the particulate matters to aggregate into larger particles. Then, the raw water is made to pass through the plug flow zone. The serpentine plug flow channel 202 in the plug flow zone uniformly pushes the raw water, keeping the raw water flow stable before entering the sedimentation tank. The raw water reaches the sedimentation tank 301, and the particulate matters settle to the bottom of the tank under the action of gravity. The sediment discharge device 302 timely discharges these sediments from the system. Before discharging the sediments, the sediment discharge auxiliary device 303 separates the bottom and the upper part of the sedimentation tank 301 through the deployed separator 303-10, preventing the sediments from resuspending when being discharged. Then, the sediment discharge device 302 is opened to discharge the sediments at the bottom of the sedimentation tank 301. After the sediments are discharged from the system, the sediment discharge auxiliary device 303 returns to its original state. Finally, the water treated by sedimentation in the sedimentation tank 301 reaches the filtration zone. The filter plate 402 filters the remaining fine particles in the raw water through a multi-layer design and a structure with different pore sizes, thus completing the pretreatment operation of the raw water.

[0072] In this article, specific examples are used to elaborate on the principle and implementation mode of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present invention, several improvements and modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A raw water pretreatment system, characterized in that: The raw water pretreatment system comprises a flocculation zone, a flow-pushing zone, a sedimentation zone and a filtration zone, wherein the flocculation zone, the flow-pushing zone, the sedimentation zone and the filtration zone are sequentially connected; The sedimentation area comprises a sedimentation tank (301), a sediment discharge device (302) and a sediment discharge auxiliary device (303), wherein the sediment discharge device (302) is located at the bottom of the sedimentation tank (301), the sediment discharge auxiliary device (303) is located inside the sedimentation tank (301), and the bottom of the inner side of the sedimentation tank (301) is a bucket-shaped structure; The sediment discharge auxiliary device (303) comprises a placement chamber (303-1), a connection chamber (303-2), a rotating motor (303-3), a roller (303-4), a plurality of sliding rods (303-5), a moving block (303-6), a plurality of springs (303-7), a plurality of connecting rods (303-8), a connecting block (303-9) and an isolating member (303-10); the placement chamber (303-1) is located at the top of the inner side of the sedimentation tank (301); the placement chamber (303-1) is connected to the sedimentation tank (301); the connecting chamber (303-2) is located at the bottom of the placement chamber (303-1); the connecting chamber (303-2) is communicated with the placement chamber (303-1); The rotating motor (303-3) is located inside the placement cavity (303-1), the rotating motor (303-3) is connected to the placement cavity (303-1), and the rotating roller (303-4), a plurality of sliding rods (303-5), a moving block (303-6) and a plurality of springs (303-7) are all located inside the connection cavity (303-2); One end of the rotating roller (303-4) is connected to the rotating end of the rotating motor (303-3); a spiral sliding groove is provided on the surface of the rotating roller (303-4); a slider is provided on the moving block (303-6); the slider corresponds to the sliding groove; the slider is connected to the moving block (303-6); the moving block (303-6) and the rotating roller (303-4) are slidably matched via the slider and the sliding groove; A plurality of sliding rods (303-5) are distributed circumferentially on the outer side of the rotating roller (303-4), two ends of the sliding rods (303-5) are connected to the connecting cavity (303-2), a plurality of openings are provided on the outer edge of the moving block (303-6), the openings correspond to the sliding rods (303-5) one by one, and the moving block (303-6) is slidably matched with the sliding rods (303-5) through the openings; A plurality of springs (303-7) are arranged on the upper part of the moving block (303-6), the springs (303-7) correspond to the sliding rods (303-5) one by one, the springs (303-7) are sleeved outside the sliding rod (303-5), and the two ends of the springs (303-7) are respectively connected to the moving block (303-6) and the connecting cavity (303-2); A plurality of connecting rods (303-8) are arranged at the lower part of the moving block (303-6); the top of the connecting rod (303-8) is connected to the moving block (303-6); the bottom of the connecting rod (303-8) is connected to the connecting block (303-9); a connecting isolating piece (303-10) is arranged on a side of the connecting block (303-9) away from the connecting rod (303-8); the isolating piece (303-10) has two states: unfolded and folded; The isolating member (303-10) comprises a plurality of frames (303-10-1), elastic components (303-10-2) and a plurality of display panels (303-10-3); the plurality of frames (303-10-1) are circumferentially distributed at equal distances at the bottom of the connecting block (303-9); the frames (303-10-1) are hinged to the connecting block (303-9); and the elastic components (303-1) are arranged between the frames (303-10-1) and the connecting block (303-9). 0-2), the elastic component (303-10-2) is located on a side of the frame (303-10-1) away from the middle of the connecting block (303-9), the two ends of the elastic component (303-10-2) are respectively connected to the frame (303-10-1) and the connecting block (303-9), and display panels (303-10-3) are arranged between adjacent frames (303-10-1), and the display panels (303-10-3) are connected to the frame (303-10-1).

2. The raw water pretreatment system according to claim 1, characterized in that: The flocculation zone comprises a flocculation tank (101) and a stirring device (102), wherein the stirring device (102) is located inside the flocculation tank (101), and the stirring device (102) is connected to the flocculation tank (101); The flow-pushing area comprises a flow-pushing box (201) and a flow-pushing channel (202) arranged in a serpentine shape, wherein the flow-pushing channel (202) is located inside the flow-pushing box (201), and the flow-pushing channel (202) is connected to the flow-pushing box (201); The filtration area comprises a filtration pool (401) and a plurality of filtration plates (402), wherein the filtration plates (402) are located inside the filtration pool (401), and the filtration plates (402) are connected to the filtration pool (401).

3. The raw water pretreatment system according to claim 2, characterized in that: The sediment discharge device (302) comprises a pump body (302-1) and a discharge channel (302-2); the inlet end of the pump body (302-1) is connected to the bottom of the sedimentation tank (301); and the outlet end of the pump body (302-1) is connected to a discharge pipe.

4. The raw water pretreatment system according to claim 3, characterized in that: A sealing plate is provided between the placement cavity (303-1) and the connection cavity (303-2).

5. The raw water pretreatment system according to claim 4, characterized in that: The plurality of slide grooves are circumferentially distributed at equal distances on the surface of the rotating roller (303-4).

6. The raw water pretreatment system according to claim 5, characterized in that: The number of the sliding rods (303-5) is at least two.

7. A pretreatment method based on the raw water pretreatment system according to claim 6, characterized in that: include: S1, introducing raw water into the flocculation tank (101) of the flocculation area, and using a flocculant to flocculate the suspended matter in the water under the action of a stirring device (102); S2, the raw water after flocculation treatment flows into the plug flow area, and the plug flow channels (202) arranged in a serpentine shape in the plug flow box (201) evenly push the raw water flow to ensure that the raw water does not disturb the sediment in the sedimentation tank (301) when entering the sedimentation area; S3, the raw water enters the sedimentation tank (301), and the sediment gradually settles to the bottom of the sedimentation tank (301) under the action of gravity; S4, when the sediment is precipitated to a set amount, the rotating motor (303-3) in the sediment discharge auxiliary device (303) drives the roller (303-4), and the spiral-shaped slide groove on the surface of the roller (303-4) guides the moving block (303-6) to move downward, indirectly pushing the connecting rod (303-8) and the connecting block (303-9) to move downward, and during the movement of the connecting block (303-9), the frame (303-10-1) of the isolation member (303-10) slowly leaves the connecting cavity (303-2) from bottom to top, and under the action of the elastic component (303-10-2), the frame (303-10-1) extends outward, and the display panels (303-10-3) between the frames (303-10-1) are unfolded, and the display panels (303-10-3) separate the bottom of the sedimentation tank (301) from the upper part; S5, starting the sediment discharge device (302) at the bottom of the sedimentation tank (301) to discharge the sediment out of the system through the pump body (302-1) and the discharge channel (302-2); S6. While the sediment is being discharged, the display board (303-10-3) continues to move downward until the display board (303-10-3) is close to the bottom surface of the sedimentation tank (301), waiting for the sediment to be completely discharged; S7, after the sediment is discharged, the rotating motor (303-3) drives the roller (303-4) in the reverse direction, and the spiral-shaped slide groove on the surface of the roller (303-4) guides the moving block (303-6) to move upward, indirectly pulling the connecting rod (303-8) and the connecting block (303-9) to move upward, and during the movement of the connecting block (303-9), the frame (303-10-1) of the isolation member (303-10) slowly enters the connecting cavity (303-2) from top to bottom, and the display board (303-10-3) between the frames (303-10-1) is retracted; S8. The water after the sedimentation treatment enters the filtration area, and the filter plate (402) in the filter tank (401) filters out the remaining suspended matter in the water.

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