Vertical rapid water purification device and water purification method thereof

Abstract

The invention discloses a vertical rapid water purifying device and a water purifying method thereof, and belongs to the technical field of water purifying devices.The vertical rapid water purifying device comprises an outer cylinder, the top end and the bottom end of the outer cylinder are both connected with end covers in a sealed mode, an inner cylinder is coaxially arranged in the outer cylinder, and a sediment filtering area is formed between the inner cylinder and the outer cylinder; a stirring assembly is arranged in the inner cylinder and comprises a spiral stirrer located in the inner cylinder and a driving motor located at the top of the outer cylinder, and the driving motor drives the spiral stirrer to rotate; an inverted-cone-shaped flow guide plate is installed at an outlet in the bottom of the inner cylinder, and a gap is reserved between the flow guide plate and the inner cylinder; a filtering assembly is arranged in the precipitation filtering area, the filtering assembly comprises a support installed on the flange of the inner cavity of the inner cylinder, a net bag placed on the support and a compressed filtering material filled in the net bag, and an annular porous pressing plate is arranged above the net bag. The invention provides the vertical rapid water purifying device which can adjust the filtering precision and has an active mud cleaning function.

Description

Technical Field

[0001] This invention relates to the field of water purification equipment technology, and in particular to a vertical rapid water purification device and its purification method. Background Technology

[0002] With the increasing sophistication of water treatment standards, vertical water purification devices have been widely used in the field of industrial and domestic wastewater pretreatment due to their advantages such as small footprint and compact structure. Current vertical water purification devices usually integrate flocculation, sedimentation and filtration functions, but they still face the following technical challenges in actual operation.

[0003] First, the filter media layer in traditional devices is usually designed with a fixed stacking structure, and its porosity cannot be adapted to the dynamic changes in the raw water quality. When the turbidity of the raw water increases, the fixed filter layer is prone to penetration problems; while when the raw water quality is good, an overly dense filter layer will lead to an unnecessary increase in operating resistance.

[0004] Secondly, the sludge collection hopper at the bottom of the device usually relies on gravity for natural sludge discharge. However, since sludge has a certain viscosity, it is easy to adhere to the hopper wall and form clumps or wall-hanging phenomena. Long-term accumulation of sludge will not only reduce the effective volume, but may also induce anaerobic fermentation, further affecting the quality of the effluent.

[0005] In addition, uneven flow field distribution inside some devices can easily cause water flow disturbance when entering the sedimentation zone from the reaction zone. This disturbance may cause the formed flocs to break, thereby reducing the sedimentation effect. Finally, if traditional compressed filter media cannot be fully loosened during backwashing, the impurities trapped by it are difficult to be completely removed by high-speed water flow. This not only shortens the service life of the filter media, but also leads to faster cleaning cycles and increases equipment operating costs. Summary of the Invention

[0006] The purpose of this invention is to provide a vertical rapid water purification device that can adjust the filtration accuracy and has an active sludge removal function.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a vertical rapid water purification device, comprising an outer cylinder, wherein the top and bottom ends of the outer cylinder are sealed and connected to end caps, and an inner cylinder is coaxially arranged inside the outer cylinder, forming a sedimentation and filtration zone between the inner cylinder and the outer cylinder; The inner cylinder is equipped with a stirring assembly, which includes a spiral stirrer located in the inner cylinder and a drive motor located at the top of the outer cylinder. The drive motor drives the spiral stirrer to rotate. An inverted conical guide plate is installed at the bottom outlet of the inner cylinder, and a gap is left between the guide plate and the inner cylinder; The sedimentation filtration zone is equipped with a filtration assembly, which includes a bracket installed on the inner flange of the inner cylinder, a mesh bag placed on the bracket, and compressed filter material filled in the mesh bag. Above the mesh bag is an annular porous pressure plate, and the porous pressure plate is connected to a first telescopic rod for driving it to move up and down to adjust the porosity of the filter material. The bottom of the outer cylinder is provided with a mud collecting hopper, and the bottom of the mud collecting hopper is connected to a mud discharge pipe that passes through the end cover. The mud collecting hopper is provided with a rotatable brush plate, and the bottom of the spiral agitator is provided with a transmission structure for driving the brush plate to rotate.

[0008] As a further description of the above technical solution: the side wall of the outer cylinder is provided with a water inlet pipe for backwashing water inlet, a backwash drain outlet for discharging backwashing wastewater and a water outlet pipe for outputting clean water from bottom to top, and the upper part of the inner cylinder extends to the outside of the outer cylinder and is provided with a water inlet pipe.

[0009] As a further description of the above technical solution: the inner and outer rings of the porous pressure plate are respectively provided with sealing rings that slide and seal in contact with the outer wall of the inner cylinder and the inner wall of the outer cylinder.

[0010] As a further description of the above technical solution: the transmission structure includes an installation plate disposed at the sludge discharge pipe opening, a connecting column vertically connected to the center of the guide plate, and a rectangular hole provided at the top of the connecting column.

[0011] As a further description of the above technical solution: a second telescopic rod is installed at the bottom of the spiral stirrer, and a rectangular block that mates with a rectangular hole is installed at the bottom of the second telescopic rod; the brush plate is fixed to the edge of the mounting plate.

[0012] As a further description of the above technical solution: the compressed filter material is fiber balls, elastic sponge or elastic polymer filter material, and the ratio of the original stacking height to the height after compression of the compressed filter material is 1.5:1 to 2:1.

[0013] As a further description of the above technical solution: it also includes a raw water tank, a clear water tank and a sludge collection tank, and a backwash pump and a check valve are connected in series on the pipeline between the clear water tank and the water supply pipe.

[0014] As a further description of the above technical solution: a mounting bracket is installed on the top of the outer cylinder, the top of the mounting bracket is fixedly connected to the drive motor, a support leg is installed on the outer cylinder, and the inner cylinder is fixedly connected to the guide plate through a connector.

[0015] A water purification method includes the following steps: S1. Pre-compression of filter layer: The porous pressure plate is driven to move down by the first telescopic rod to apply pressure to the compressed filter material in order to adjust the filtration accuracy. S2, Flocculation Reaction: Raw water enters the inner cylinder, is stirred by a spiral stirrer, and undergoes a flocculation reaction with the reagents; S3, Hydraulic guidance and gravity settling: After the water flows into the sedimentation and filtration zone through the guide plate, it flows upward, and large flocs settle to the sludge collection hopper by gravity. S4. Filtration and water discharge: The upper clear liquid passes through the compressed filter media layer and is discharged from the water outlet pipe after filtration. S5. Mechanical sludge scraping and discharge: Extend the second telescopic rod to insert the rectangular block into the connecting column, and the spiral agitator drives the brush plate to scrape off the sludge from the bucket wall. At the same time, the sludge is discharged through the discharge pipe using hydrostatic pressure. S6. Backwashing: Stop the inlet and outlet water, the first telescopic rod retracts to make the filter media rebound, the backwashing pump is turned on and water enters through the water inlet pipe to impact the filter media in a countercurrent, and the sewage is discharged from the backwash drain.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. The porous pressure plate is driven by the first telescopic rod to squeeze the filter media in the mesh bag to adjust the porosity of the filter media, thereby flexibly controlling the filtration accuracy. It can not only cope with the deep treatment of high turbidity raw water, but also reduce energy consumption and extend the operation cycle when the water quality is good.

[0017] 2. With the help of the spiral agitator, the power is transmitted through the second telescopic rod, which drives the brush plate to rotate and scrape the inner wall of the sludge collection hopper. Combined with the hydrostatic pressure generated in the outer cylinder, viscous sludge can be discharged quickly, avoiding sludge caking and wall adhesion, and ensuring a clean and stable sedimentation environment.

[0018] 3. The inner cylinder area serves as the dynamic zone for high-intensity flocculation reaction, while the outer cylinder annular area serves as the static zone for sedimentation and filtration. Water flows through the bottom inverted conical guide plate, achieving a 180° U-shaped fold, which significantly reduces the flow velocity. Gravity is used to efficiently settle large floc particles, reducing the burden on subsequent filter layers.

[0019] 4. During the backwashing process, the first telescopic rod contracts, causing the filter media to rebound and expand due to its own elasticity. The filter media is in a loose state. On this basis, in conjunction with the water flow impact of the backwash pump, the filter media particles roll and collide fully in the water, so that the trapped pollutants can be completely desorbed, thereby significantly improving the cleaning efficiency of the filter media and extending its service life. Attached Figure Description

[0020] Figure 1 A cross-sectional view of the present invention is shown; Figure 2 The present invention is shown. Figure 1 Enlarged view of point A in the middle; Figure 3 A front view of the invention is shown. Figure 4 The present invention is shown. Figure 3 Enlarged view of point B in the middle; Figure 5A cross-sectional view of the sludge removal assembly of the present invention is shown; Figure 6 A perspective view of the inner cylinder and the guide plate of the present invention is shown; Figure 7 A perspective view of the spiral stirrer of the present invention is shown; Figure 8 A schematic diagram of the steps of the water purification method of the present invention is shown.

[0021] Legend: 10. Outer cylinder; 101. Water inlet pipe; 102. Backwash drain outlet; 103. Water outlet pipe; 11. End cap; 12. Support leg; 13. Mounting bracket; 14. Inner cylinder; 141. Water inlet pipe; 15. Raw water tank; 16. Clear water tank; 17. Sludge collection trough; 18. Sludge collection hopper; 20. Spiral mixer; 21. Drive motor; 22. Connecting parts; 23. Baffle plate; 30. Flange; 31. Support; 32. Mesh bag; 33. Compressed filter media; 34. First telescopic rod; 35. Sealing ring; 36. Perforated pressure plate; 40. Backwash pump; 41. Check valve; 50. Sludge discharge pipe; 51. Mounting plate; 52. Connecting column; 53. Second telescopic rod; 54. Rectangular block; 55. Brush plate. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below 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.

[0023] Please see Figures 1-8 The present invention provides a technical solution: a vertical rapid water purification device, including a vertically arranged outer cylinder 10, with end caps 11 sealingly connected to the top and bottom of the outer cylinder 10 respectively. To improve the stability of the device, a number of support legs 12 are evenly arranged on the outer circumference of the bottom of the outer cylinder 10.

[0024] To meet functional requirements, multiple pipe interfaces are provided on the outer wall of the outer cylinder 10. Different interfaces are located at different heights and perform corresponding functions: a water inlet pipe 101 is provided on the lower side wall of the outer cylinder 10 for backwashing water inlet; a backwash drain outlet 102 is provided on the upper side wall of the outer cylinder 10 for discharging wastewater generated during the backwashing process; and a water outlet pipe 103 is provided on the side wall near the top of the outer cylinder 10 for conveying filtered clean water to the outside.

[0025] A mounting bracket 13 is installed above the top end cap 11. In terms of internal structure design, an inner cylinder 14 is fixedly inserted through the center of the top end cap 11. The inner cylinder 14 is coaxially arranged inside the outer cylinder 10. Its upper outer wall extends to the outside and is provided with a water inlet pipe 141 for raw water to flow in.

[0026] An annular sedimentation and filtration zone is formed between the inner wall of the outer cylinder 10 and the outer wall of the inner cylinder 14, providing a quiet working environment for water treatment. In order to achieve efficient flocculation reaction, a stirring component is installed inside the inner cylinder 14.

[0027] The mixing assembly includes a spiral stirrer 20 located in the inner cylinder 14. The top end of the spiral stirrer 20 passes through the inner cylinder 14 and extends to the outside, and is fixedly connected to the output end of the drive motor 21 on the top of the mounting bracket 13. The drive motor 21 achieves efficient mixing of the raw water entering the inner cylinder 14 by rotating the spiral stirrer 20.

[0028] During the flocculation reaction, raw water enters the inner cylinder 14 through the water inlet pipe 141. To ensure that the reagent and raw water are fully mixed and to avoid damaging the formed flocs, the spiral stirrer 20 rotates continuously under the drive of the drive motor 21.

[0029] According to the design of this embodiment, the rated speed range of the drive motor 21 is 60 to 120 rpm. When the turbidity of the raw water is low, the speed of the drive motor is set to 60 to 80 rpm. This speed can generate moderate turbulence, effectively promote the collision between small particles, and enhance the flocculation effect. When the turbidity of the raw water is high or the treatment volume increases, the speed is increased to 100 to 120 rpm to increase the shear force and ensure that the reagent is rapidly and uniformly dispersed in the inner cylinder 14, thereby optimizing the reaction efficiency.

[0030] The device adopts a vertical pressure-bearing structure design. The connection between the top end cover 11 and the outer cylinder 10 and the inner cylinder 14 is equipped with a polymer rubber sealing gasket to achieve reliable sealing. The output end of the drive motor 21 is equipped with a mechanical seal through the through part at the top of the inner cylinder 14. The mechanical seal consists of a stationary ring and a moving ring. Its main function is to prevent the high-pressure water flow in the inner cylinder 14 from leaking along the stirring shaft, thereby effectively ensuring the safety and stability of the motor operation.

[0031] A guide plate 23 is installed at the bottom outlet of the inner cylinder 14 via a connector 22. The cross-section of the guide plate 23 is an inverted cone shape, and a gap is left between the guide plate 23 and the inner cylinder 14 for water to flow through. This design can spread the water flowing out of the inner cylinder 14 evenly to the surrounding area and guide it upward, so that the water flows smoothly into the annular area between the outer cylinder 10 and the inner cylinder 14.

[0032] After the water flow impacts the guide plate 23, it undergoes a 180-degree U-shaped turn and then enters the annular static area between the outer cylinder 10 and the inner cylinder 14. Inside the inner cylinder 14, the downward velocity of the water flow is maintained at 0.5-0.8 m / s. After entering the annular area with a sudden increase in cross-sectional area, the upward velocity of the water flow decreases to 0.02-0.05 m / s. This lower flow velocity effectively reduces the upward force of the water flow, making it insufficient to overcome the gravity of the larger particle flocs, thereby causing these particles to detach from the water flow trajectory and settle into the bottom sludge collection hopper 18.

[0033] A sedimentation and filtration zone is formed between the inner cylinder 14 and the outer cylinder 10. A filter assembly is provided in the sedimentation and filtration zone. The filter assembly includes a flange 30 fixedly installed on the inner wall of the outer cylinder 10 and the outer wall of the inner cylinder 14. The flange 30 is located below the water outlet pipe 103. A bracket 31 is installed on the top of the flange 30. The bracket 31 is provided with several through holes to allow water to flow through.

[0034] A mesh bag 32 is placed at the top of the support 31. The mesh bag 32 is filled with compressed filter media 33. The compressed filter media 33 is preferably made of fiber balls, elastic sponge or polymer filter media with elastic properties.

[0035] To adjust the porosity of the filter layer and facilitate backwashing, a ring-shaped porous pressure plate 36 is provided on the top of the mesh bag 32. The inner and outer rings of the porous pressure plate 36 are respectively provided with wear-resistant sealing rings 35, which are used to achieve sliding sealing contact with the outer wall of the inner cylinder 14 and the inner wall of the outer cylinder 10. A drive mechanism is connected above the porous pressure plate 36. The drive mechanism consists of several first telescopic rods 34, such as electric push rods or hydraulic rods.

[0036] The fixed end of the first telescopic rod 34 is connected to the inner wall of the outer cylinder 10 and the upper part of the outer wall of the inner cylinder 14, and its telescopic end is fixedly connected to the porous pressure plate 36. By driving the telescopic movement of the first telescopic rod 34, the porous pressure plate 36 can be moved up and down, thereby compacting or loosening the compressed filter material 33. The ratio of the original stacking height of the compressed filter material 33 to the height after compression is 1.5:1 to 2:1.

[0037] In addition, in order to collect and discharge the deposited sludge, a funnel-shaped sludge collection hopper 18 is designed at the bottom of the inner cavity of the outer cylinder 10. The bottom center of the sludge collection hopper 18 is connected to the sludge discharge pipe 50. The sludge discharge pipe 50 extends through the bottom of the end cover 11 to the outside of the device and is sealed to the end cover 11.

[0038] In order to efficiently clean the sludge adhering to the inner wall of the sludge collection hopper 18, a sludge discharge component and a sludge brushing structure are installed inside the sludge collection hopper 18.

[0039] The mud collection hopper 18 is equipped with a rotatable brush plate 55. The bottom end of the spiral agitator 20 is equipped with a transmission structure for driving the brush plate 55 to rotate. The transmission structure includes a mounting plate 51 set at the opening of the mud discharge pipe 50. Specifically, the mounting plate 51 is set at the opening of the top of the mud discharge pipe 50. A vertically set connecting column 52 is vertically connected to the center of the mounting plate 51. The upper end of the connecting column 52 passes through the center of the guide plate 23 and is rotatably connected to the guide plate 23, that is, the connecting column 52 can rotate relative to the guide plate 23.

[0040] The top center of the connecting column 52 is provided with a rectangular hole, and in conjunction with it, the bottom center of the spiral stirrer 20 is fixedly installed with a second telescopic rod 53, and the bottom end of the second telescopic rod 53 is equipped with a rectangular block 54.

[0041] When the sludge brushing function is activated, the second telescopic rod 53 extends and inserts into the rectangular hole at the top of the connecting column 52 via the drive rectangular block 54, causing the spiral agitator 20 to drive the connecting column 52 to rotate. A brush plate 55 that fits the shape of the inner wall of the sludge collection hopper 18 is fixed at the edge of the mounting plate 51. The rotation of the connecting column 52 further drives the mounting plate 51 and the brush plate 55 to move, thereby effectively scraping away the sludge from the inner wall of the sludge collection hopper 18.

[0042] Specifically, during the sludge scraping operation, the second telescopic rod 53 drives the rectangular block 54 to achieve mechanical coupling with the connecting column 52. At the same time, the drive motor 21 switches to a low-speed, high-torque mode and controls the speed within the range of 15 to 30 revolutions per minute. Maintaining this speed not only enables the brush plate 55 to effectively overcome the stickiness of the sludge and thoroughly clean the inner wall of the sludge collection hopper 18, but also effectively prevents the concentrated sludge layer deposited at the bottom from being disturbed and entering the upper clear water zone due to excessive speed.

[0043] Regarding the external pipeline configuration, a raw water tank 15, a clear water tank 16, and a sludge collection trough 17 are installed near the bottom of the outer cylinder 10.

[0044] The raw water tank 15 is connected to the inlet pipe 141 via a water pump and pipeline; the clear water tank 16 is connected via the outlet pipe 103; and the sludge collection trough 17 is located below the outlet of the sludge discharge pipe 50.

[0045] In addition, the system is equipped with a backwashing assembly, including a backwashing pump 40 and a check valve 41, which are connected in series in the pipeline connecting the clear water tank 16 and the water supply pipe 101, for transporting the clear water in the clear water tank 16 to the bottom of the outer cylinder 10 for backwashing.

[0046] When the system enters the backwashing mode, the backwashing pump 40 injects high-pressure clean water into the device. The backwashing water flow delivered through the water inlet pipe 101 has an instantaneous flow velocity of 2 to 5 meters per second below the filter media layer. The upward impact force generated by this flow velocity can overcome the self-weight of the compressed filter media 33 in the loose state, so that the filter media can achieve an expansion rate of 30% to 50% in the space of the mesh bag 32, and effectively remove pollutants through the mutual collision between the filter media.

[0047] A water purification method Step S1: Pre-compression of the filter layer Before the system starts to receive water, the control system (the control system of this device is programmed with PLC) first controls the extension of the first telescopic rod 34, which drives the porous pressure plate 36 to move downward. The porous pressure plate 36 applies pressure to the compressed filter material 33 in the mesh bag 32, compressing its volume and reducing its porosity. By adjusting the stroke of the first telescopic rod 34, the filtration accuracy of the filter layer can be adjusted according to the raw water quality. The tighter the compression, the higher the accuracy.

[0048] Step S2: Flocculation reaction Start the drive motor 21 to drive the spiral agitator 20 inside the inner cylinder 14 to rotate. At the same time, the raw water and coagulant are mixed and enter the inner cylinder 14 through the water inlet pipe 141. Since the spiral agitator 20 is confined in the small inner cylinder 14, high-intensity turbulence is generated, which promotes the rapid mixing of the agent and the raw water and causes a flocculation reaction to form larger flocs. At this time, the inner cylinder 14 is the dynamic zone and the water flow is in a state of violent stirring.

[0049] Step S3: Hydraulic guidance and gravity settlement The mixed water flows downward to the bottom outlet of the inner cylinder 14, where it impacts the inverted conical guide plate 23. The guide plate 23 spreads the vertically downward water flow horizontally in all directions. The water flow then turns upward under the restriction of the flow channel and enters the annular area between the outer cylinder 10 and the inner cylinder 14, i.e., the quiet zone.

[0050] During this process, the water flow undergoes a 180-degree U-shaped fold, and due to the sudden increase in the cross-sectional area of ​​the flow channel, the upward flow velocity decreases rapidly. Under the combined effects of gravity and inertia, the large flocs cannot rise with the water flow, but instead break away from the water flow trajectory and directly sink into the mud collection hopper 18 at the bottom.

[0051] Step S4: Filtration and Water Discharge After initial settling, the upper clear liquid rises slowly in the quiet zone, passes through the support 31 and the mesh bag 32, and enters the compacted filter media 33 layer. The filter media layer traps the remaining tiny suspended solids and colloids in the water. The filtered clear water passes through the porous pressure plate 36 and finally collects at the top of the outer cylinder 10, and is discharged into the clear water pool 16 through the water outlet pipe 103.

[0052] When the sludge accumulated in the sludge hopper 18 reaches a certain amount, the sludge discharge operation is executed based on the time setting or sensor monitoring. The sludge discharge can be carried out simultaneously with the filtration process without stopping the machine.

[0053] Step S5: Mechanical sludge scraping The second telescopic rod 53 is extended, pushing the rectangular block 54 at its bottom end to move downward and insert into the rectangular hole at the top of the connecting column 52, thus achieving mechanical coupling between the spiral agitator 20 and the sludge discharge assembly below. At this time, the drive motor 21 continues to rotate, driving the connecting column 52 to rotate through the spiral agitator 20, which in turn drives the mounting plate 51 and the brush plate 55 to rotate and scrape the inner wall of the sludge collection hopper 18. This action can effectively peel off the sticky sludge adhering to the hopper wall, preventing the sludge from hardening or sticking to the wall.

[0054] Step S6: Static pressure sludge removal While the brush plate 55 is rotating and scraping sludge (or after scraping sludge is finished), the valve on the sludge discharge pipe 50 is opened. Using the huge hydrostatic pressure generated by the water level several meters deep inside the outer cylinder 10, the high-concentration sludge at the bottom of the sludge collection hopper 18 is quickly pushed out from the sludge discharge pipe 50 to the sludge collection trough 17. After the sludge discharge is finished, the valve is closed, the second telescopic rod 53 retracts, the rectangular block 54 disengages from the connecting column 52, and the scraping action stops.

[0055] When the filter bed becomes saturated with dirt, the effluent quality declines, or the transmembrane pressure difference becomes too large, the system enters backwashing mode.

[0056] Step S7: Loosen the filter layer By closing the valves of the inlet pipe 141 and the outlet pipe 103, the first telescopic rod 34 is controlled to retract, which drives the porous pressure plate 36 to rise. The compressed filter media 33, which loses pressure, rebounds and expands under its own elasticity, and the pores between the filter media particles become larger, providing space for pollutant desorption.

[0057] Step S8: Hydraulic backwash Turn on the backwash pump 40 and open the check valve 41. The clean water in the clear water tank 16 enters the static area at the bottom of the outer cylinder 10 through the water inlet pipe 101 and flows upward. The high-speed water flow passes through the support 31, impacting and suspending the loose compressed filter media 33. The filter media rolls and collides in the water, peeling off the attached dirt.

[0058] Step S9: Drainage and Reset The backwash water carrying dirt rises above the porous pressure plate 36 and is eventually discharged from the device through the backwash drain port 102 located on the side wall of the outer cylinder 10. After the backwash is completed, the backwash pump 40 is turned off, and step S1 is repeated to restore the normal filtration state.

[0059] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A vertical rapid water purification device, comprising an outer cylinder (10), characterized in that: The top and bottom ends of the outer cylinder (10) are sealed with end caps (11), and an inner cylinder (14) is coaxially arranged inside the outer cylinder (10), forming a sedimentation and filtration zone between the inner cylinder (14) and the outer cylinder (10). The inner cylinder (14) is provided with a stirring assembly, which includes a spiral stirrer (20) located in the inner cylinder (14) and a drive motor (21) located at the top of the outer cylinder (10). The drive motor (21) drives the spiral stirrer (20) to rotate. The bottom outlet of the inner cylinder (14) is provided with an inverted conical guide plate (23), and there is a gap between the guide plate (23) and the inner cylinder (14). The sedimentation filtration zone is equipped with a filtration assembly, which includes a bracket (31) mounted on the inner flange (30) of the inner cylinder (14), a mesh bag (32) placed on the bracket (31), and compressed filter material (33) filled in the mesh bag (32). A ring-shaped porous pressure plate (36) is provided above the mesh bag (32), and the porous pressure plate (36) is connected to a first telescopic rod (34) for driving it to move up and down to adjust the porosity of the filter material. The bottom of the outer cylinder (10) is provided with a mud collection hopper (18), and the bottom of the mud collection hopper (18) is connected to a mud discharge pipe (50) that passes through the end cover (11). The mud collection hopper (18) is provided with a rotatable brush plate (55), and the bottom end of the spiral agitator (20) is provided with a transmission structure for driving the brush plate (55) to rotate.

2. The vertical rapid water purification device according to claim 1, characterized in that: The outer cylinder (10) has a water inlet pipe (101) for backwashing water inlet, a backwash drain outlet (102) for backwashing wastewater discharge, and a water outlet pipe (103) for outputting clean water on its side wall from bottom to top. The upper part of the inner cylinder (14) extends to the outside of the outer cylinder (10) and is provided with a water inlet pipe (141).

3. The vertical rapid water purification device according to claim 1, characterized in that: The inner and outer rings of the porous pressure plate (36) are respectively provided with sealing rings (35) that slide and seal in contact with the outer wall of the inner cylinder (14) and the inner wall of the outer cylinder (10).

4. The vertical rapid water purification device according to claim 1, characterized in that: The transmission structure includes an installation plate (51) set at the opening of the mud discharge pipe (50), and a connecting column (52) that is rotatably connected to the center of the guide plate (23) is vertically connected to the installation plate (51). The top of the connecting column (52) is provided with a rectangular hole.

5. A vertical rapid water purification device according to claim 4, characterized in that: The bottom end of the spiral stirrer (20) is equipped with a second telescopic rod (53), and the bottom end of the second telescopic rod (53) is equipped with a rectangular block (54) that matches the rectangular hole. The brush plate (55) is fixed to the edge of the mounting plate (51).

6. A vertical rapid water purification device according to claim 1, characterized in that: The compressed filter media (33) is fiber balls, elastic sponge or elastic polymer filter media, and the ratio of the original stacking height to the height after compression of the compressed filter media (33) is 1.5:1 to 2:

1.

7. A vertical rapid water purification device according to claim 1, characterized in that: It also includes a raw water tank (15), a clear water tank (16) and a sludge collection tank (17). A backwash pump (40) and a check valve (41) are connected in series on the pipeline between the clear water tank (16) and the water supply pipe (101).

8. A vertical rapid water purification device according to claim 1, characterized in that: The top of the outer cylinder (10) is equipped with a mounting bracket (13), the top of the mounting bracket (13) is fixedly connected to the drive motor (21), the outer cylinder (10) is equipped with a support leg (12), and the inner cylinder (14) is fixedly connected to the guide plate (23) through a connector (22).

9. A water purification method based on the vertical rapid water purification device according to any one of claims 1-8, characterized in that, Includes the following steps: S1, Pre-compression of filter layer: The porous pressure plate (36) is driven to move down by the first telescopic rod (34) to apply pressure to the compressed filter material (33) to adjust the filtration accuracy; S2, Flocculation reaction: Raw water enters the inner cylinder (14), is stirred by the spiral stirrer (20) and undergoes a flocculation reaction with the reagent; S3, hydraulic guidance and gravity settling: After the water flows through the guide plate (23) into the sedimentation and filtration zone, it flows upward. Large flocs settle to the sludge collection hopper (18) by gravity. S4, Filtration and Discharge: The upper clear liquid passes through the compressed filter media (33) layer and is discharged from the outlet pipe (103); S5. Mechanical scraping and sludge removal: Extend the second telescopic rod (53) to insert the rectangular block (54) into the connecting column (52), and the spiral agitator (20) drives the brush plate (55) to scrape off the sludge on the bucket wall. At the same time, the sludge is discharged through the sludge discharge pipe (50) using hydrostatic pressure. S6. Backwashing: Stop the inlet and outlet water, the first telescopic rod (34) retracts to make the filter material rebound, the backwash pump (40) is turned on and water is introduced through the water inlet pipe (101) to impact the filter material in the countercurrent, and the sewage is discharged from the backwash drain (102).

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