A back-flushable quartz sand filter for sewage treatment

Abstract

The utility model discloses a quartz sand filter tank for sewage treatment with backwashing, including filter jar, the inner wall fixed connection of filter jar has quartz sand coarse grid, quartz sand fine grid, deposit screen, be provided with coarse quartz sand between quartz sand coarse grid and deposit screen, be provided with fine quartz sand between deposit screen and quartz sand fine grid, the bottom of quartz sand fine grid is provided with water distributor, and the inner wall fixed connection of water distributor filters jar, the top of filter jar is provided with drive shaft, and drive shaft rotation connects filter jar, and the bottom of drive shaft is equipped with the pivot of sleeve, and the top of pivot is provided with the slot of the bottom of drive shaft's adaptation, and the bottom of drive shaft is arranged in the slot, and quartz sand coarse grid and deposit screen between and quartz sand fine grid and deposit screen between all are provided with the stirring rod. The utility model effectively expands the stirring range, can more thoroughly remove the impurity of being captured in quartz sand, effectively improves the effect of backwashing, improves the overall efficiency of backwashing work.

Description

Technical Field

[0001] This utility model relates to the field of sewage treatment equipment technology, and in particular to a backwashable quartz sand filter tank for sewage treatment. Background Technology

[0002] Quartz sand filter tanks are devices used for water treatment, mainly for removing suspended solids, silt, impurities, etc. from water. Their working principle is to use quartz sand as a filter medium, and through physical filtration, the particulate matter in the water is captured by the quartz sand, thereby achieving the purpose of purifying the water quality.

[0003] A search revealed Chinese patent CN209848408U, which discloses a quartz sand filtration device with a stirring assembly. The device includes a support frame, a tank with an inlet and outlet pipe, quartz sand placed inside the tank, and a backwash inlet and outlet pipe mounted on the tank. The tank contains a stirring assembly for agitating the quartz sand. The assembly includes a rotating shaft rotatably connected to the tank and with one end inserted into the quartz sand, stirring blades fixedly connected to the shaft for agitating the quartz sand, and a rotating component mounted on the tank for driving the shaft to rotate. The rotating component includes a worm gear fixedly mounted on the shaft, a worm rotatably connected to the tank and meshing with the worm gear, and a motor mounted on the tank for driving the worm to rotate. This design can agitate and tumble the quartz sand during backwashing, making it easier for impurities to separate from the sand, thus improving the efficiency of quartz sand backwashing and reducing backwashing time.

[0004] The aforementioned quartz sand filtration device with a stirring component has the following shortcomings: although the stirring blades agitate the quartz sand to improve the backwashing efficiency, the agitation area is limited and the agitation effect is not ideal. Quartz sand is a solid particulate matter, and only the quartz sand within the movement path of the stirring blades can be effectively agitated. The backwashing effect of the quartz sand may not reach the ideal state, and it cannot effectively remove the captured impurities in the quartz sand. Therefore, it is necessary to design a backwashable quartz sand filter tank for sewage treatment to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a backwashable quartz sand filter tank for wastewater treatment.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A backwashable quartz sand filter tank for wastewater treatment includes a filter tank. A coarse quartz sand screen, a fine quartz sand screen, and a storage screen are fixedly connected to the inner wall of the filter tank. Coarse quartz sand is disposed between the coarse quartz sand screen and the storage screen, and fine quartz sand is disposed between the storage screen and the fine quartz sand screen. A water distributor is disposed at the bottom of the fine quartz sand screen and is fixedly connected to the inner wall of the filter tank. A drive shaft passes through the top of the filter tank and is rotatably connected to the filter tank. A rotating shaft is sleeved at the bottom end of the drive shaft. The top of the rotating shaft has a slot that matches the bottom end of the drive shaft. The bottom end of the drive shaft is set in the slot. The rotating shaft is slidably connected to the drive shaft. A stirring rod is provided between the coarse quartz sand screen and the storage screen, and between the fine quartz sand screen and the storage screen. The stirring rod is fixedly connected to the rotating shaft. A drive disc is fixedly connected to the outer wall of the drive shaft. The drive disc is inclined. Rollers are provided at the top and bottom of the drive disc. Fixed shafts pass through both rollers. The rollers are rotatably connected to the fixed shafts. The two fixed shafts are simultaneously... A movable block is fixedly connected to one side, and a fixed block is fixedly connected to the bottom end of the movable block near the rotating shaft. A limiting ring is rotatably connected to the inner wall of the fixed block. The limiting ring is sleeved on the rotating shaft and fixedly connected to the rotating shaft. Because the stirring rod can move up and down during rotation, the up-and-down moving stirring rod expands the effective stirring range, ensuring that all quartz sand can be stirred, thereby avoiding the decrease in filtration efficiency caused by local deposition. This effectively solves the problem mentioned in the background technology that although the existing equipment improves the backwashing efficiency by stirring the quartz sand with stirring blades, the stirring area is limited and the stirring effect is not ideal. Quartz sand is a solid particulate matter, and only the quartz sand within the moving path of the stirring blades can be effectively stirred. The backwashing effect of the quartz sand may not reach the ideal state, and it is impossible to effectively remove the captured impurities in the quartz sand. Thus, this technology effectively expands the stirring range, can more thoroughly remove the captured impurities in the quartz sand, effectively improve the backwashing effect, and improve the overall efficiency of the backwashing work.

[0007] As a further embodiment of this utility model, sealing rings are provided on the coarse quartz sand grid, the fine quartz sand grid, and the storage screen, and the rotating shaft rotatably connects the sealing rings on the coarse quartz sand grid, the fine quartz sand grid, and the storage screen.

[0008] As a further embodiment of this utility model, a discharge pipe is fixedly connected to the top outer wall of the filter tank, and a sealing cap is fastened to the discharge pipe by bolts. The discharge pipe is located on top of the quartz sand coarse grid.

[0009] As a further embodiment of this utility model, a protective box is fixedly connected to the top inner wall of the filter tank, the protective box is sleeved on the rotating shaft, and the rotating shaft is rotatably connected to the protective box.

[0010] As a further embodiment of this utility model, two guide rods are fixedly connected to the bottom inner wall of the protective box. The guide rods pass through the movable block, and the movable block is slidably connected to the guide rods.

[0011] As a further embodiment of this utility model, the bottom of the filter tank is provided with a water outlet pipe and a water injection pipe, the water injection pipe is connected to the input end of the water distributor, and the top of the filter tank is provided with a water inlet pipe.

[0012] As a further embodiment of this utility model, a bracket is fixedly connected to the top of the filter tank, a motor is fixedly connected to the top of the bracket, a drive shaft is fixedly connected to the output end of the motor, a bearing seat is fixedly connected to the top of the filter tank, and the drive shaft is fixedly connected to the inner wall of the inner ring of the bearing on the bearing seat.

[0013] The beneficial effects of this utility model are as follows: Because the agitator can move up and down during rotation, the effective agitation range is expanded, ensuring that all quartz sand is agitated. This avoids the decrease in filtration efficiency caused by localized sedimentation. It effectively solves the problem mentioned in the background technology that while existing equipment improves backwashing efficiency by agitating quartz sand with agitator blades, the agitation area is limited, and the agitation effect is not ideal. Quartz sand is a solid particulate matter, and only the quartz sand within the movement path of the agitator blades can be effectively agitated. Therefore, the backwashing effect of the quartz sand may not reach the ideal state, and it cannot effectively remove trapped impurities from the quartz sand. This technology effectively expands the agitation range, more thoroughly removes trapped impurities from the quartz sand, effectively improves the backwashing effect, and enhances the overall efficiency of the backwashing operation. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a backwashable quartz sand filter tank for sewage treatment proposed in this utility model. Figure 2 This is a cross-sectional structural diagram of a backwashable quartz sand filter tank for wastewater treatment proposed in this utility model. Figure 3 This is a partial structural schematic diagram of a backwashable quartz sand filter tank for sewage treatment proposed in this utility model. Figure 4 This is a schematic diagram of the protective box structure of a backwashable quartz sand filter tank for sewage treatment proposed in this utility model. Figure 5 This is a schematic diagram of the moving block of a backwashable quartz sand filter tank for wastewater treatment proposed in this utility model. Figure 6This is a cross-sectional view of the fixed block of a backwashable quartz sand filter tank for wastewater treatment proposed in this utility model.

[0015] In the diagram: 1. Filter tank; 2. Quartz sand coarse screen; 3. Quartz sand fine screen; 4. Storage screen; 5. Coarse quartz sand; 6. Fine quartz sand; 7. Water distributor; 8. Drive shaft; 9. Rotating shaft; 10. Slot; 11. Stirring rod; 12. Drive disc; 13. Roller; 14. Fixed shaft; 15. Moving block; 16. Fixed block; 17. Limiting ring; 18. Protective box; 19. Discharge pipe; 20. Sealing cover; 21. Water outlet pipe; 22. Water injection pipe; 23. Water inlet pipe; 24. Bracket; 25. Motor; 26. Bearing seat; 27. Guide rod. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] Reference Figure 1-6A backwashable quartz sand filter tank for wastewater treatment includes a filter tank 1. A coarse quartz sand screen 2, a fine quartz sand screen 3, and a storage screen 4 are fixedly connected to the inner wall of the filter tank 1. Coarse quartz sand 5 is disposed between the coarse quartz sand screen 2 and the storage screen 4. Fine quartz sand 6 is disposed between the storage screen 4 and the fine quartz sand screen 3. A water distributor 7 is disposed at the bottom of the fine quartz sand screen 3 and is fixedly connected to the inner wall of the filter tank 1. A drive shaft 8 passes through the top of the filter tank 1 and is rotatably connected to the filter tank 1. A rotating shaft 9 is sleeved at the bottom end of the drive shaft 8. A slot 10 is provided at the top to fit the bottom end of the drive shaft 8. The bottom end of the drive shaft 8 is set in the slot 10. A rotating shaft 9 is slidably connected to the drive shaft 8. A stirring rod 11 is provided between the coarse quartz sand screen 2 and the storage screen 4, and between the fine quartz sand screen 3 and the storage screen 4. The stirring rod 11 is fixedly connected to the rotating shaft 9. A drive disk 12 is fixedly connected to the outer wall of the drive shaft 8. The drive disk 12 is inclined. Rollers 13 are provided at the top and bottom of the drive disk 12. Fixed shafts 14 are passed through both rollers 13. The rollers 13 are rotatably connected to the fixed shafts 14. A movable block 15 is fixedly connected to the same side of shaft 14. A fixed block 16 is fixedly connected to the bottom end of movable block 15 near the rotating shaft 9. A limiting ring 17 is rotatably connected to the inner wall of fixed block 16. The limiting ring 17 is sleeved on the rotating shaft 9 and fixedly connected to the rotating shaft 9. Because the stirring rod can move up and down during rotation, the up-and-down movement of the stirring rod expands the effective stirring range, ensuring that all quartz sand is agitated, thereby avoiding the decrease in filtration efficiency caused by localized sedimentation. This effectively solves the problem mentioned in the background art. Although the equipment improves the backwashing efficiency by agitating the quartz sand with stirring blades, the agitation area is limited and the agitation effect is not ideal. Quartz sand is a solid particulate matter, and only the quartz sand within the movement path of the stirring blades can be effectively agitated. The backwashing effect of the quartz sand may not reach the ideal state, and it cannot effectively remove the trapped impurities in the quartz sand. Therefore, this equipment effectively expands the agitation range, can more thoroughly remove the trapped impurities in the quartz sand, effectively improve the backwashing effect, and improve the overall efficiency of the backwashing work.

[0018] In this embodiment, sealing rings are provided on the coarse quartz sand grid 2, the fine quartz sand grid 3, and the storage screen 4, and the rotating shaft 9 is rotatably connected to the sealing rings on the coarse quartz sand grid 2, the fine quartz sand grid 3, and the storage screen 4.

[0019] In this embodiment, a discharge pipe 19 is fixedly connected to the top outer wall of the filter tank 1. A sealing cover 20 is fastened to the discharge pipe 19 by bolts. The discharge pipe 19 is set on the top of the quartz sand coarse grid 2. When backwashing, the screws on the sealing cover 20 can be unscrewed. During the backwashing process, the impurities flushed out can be discharged through the discharge pipe 19.

[0020] In this embodiment, a protective box 18 is fixedly connected to the top inner wall of the filter tank 1. The protective box 18 is sleeved on the rotating shaft 9, and the rotating shaft 9 is rotatably connected to the protective box 18.

[0021] In this embodiment, two guide rods 27 are fixedly connected to the bottom inner wall of the protective box 18. The guide rods 27 pass through the moving block 15, and the moving block 15 is slidably connected to the guide rods 27. When the moving block 15 moves up and down, it will move along the guide rods 27 to ensure the stability of the fixed block 16 and the fixed shaft 14 when they move up and down.

[0022] In this embodiment, the bottom of the filter tank 1 is provided with an outlet pipe 21 and an injection pipe 22. The injection pipe 22 is connected to the input end of the water distributor 7. The top of the filter tank 1 is provided with an inlet pipe 23. The filtered water is discharged through the outlet pipe 21, and the sewage is injected into the filter tank 1 through the inlet pipe 23 for filtration. The injection pipe 22 is connected to an external water supply device, and water is supplied through the external water supply device for backwashing.

[0023] In this embodiment, a bracket 24 is fixedly connected to the top of the filter tank 1, a motor 25 is fixedly connected to the top of the bracket 24, a drive shaft 8 is fixedly connected to the output end of the motor 25, a bearing seat 26 is fixedly connected to the top of the filter tank 1, and the drive shaft 8 is fixedly connected to the inner wall of the inner ring of the bearing on the bearing seat 26.

[0024] Working Principle: During use, wastewater is introduced through inlet pipe 23 and injected into filter tank 1. It is filtered by coarse quartz sand 5 and fine quartz sand 6. A storage screen 4 is installed to prevent the coarse and fine quartz sand 5 and 6 from mixing. Quartz sand coarse grid 2 and quartz sand fine grid 3 are installed to prevent the coarse and fine quartz sand 5 and 6 from expanding and scattering during use. The filtered water is discharged through outlet pipe 21. After a period of use, backwashing is required. For external power supply, the sealing cover 20 is removed, and water is supplied through an external water supply device. Water is delivered to water distributor 7 through water injection pipe 22 and sprayed out through water distributor 7 for rinsing. Simultaneously, the external PLC controller starts motor 25, which in turn drives drive shaft 8 to rotate. Drive shaft 8 then drives rotating shaft 9, which in turn drives stirring rod 11 to agitate the coarse and fine quartz sand 5 and 6, causing them to disperse as much as possible and removing any impurities. The impurities flushed out are discharged through the discharge pipe 19. Agitation prevents excessive concentration of coarse and fine quartz sand 5 and 6, which would otherwise make it difficult to flush out the impurities, thus improving the backwashing effect and efficiency. During the rotation of the drive shaft 8, the drive disc 12 also rotates, causing the roller 13 to move up and down reciprocally. The roller 13 then moves the fixed shaft 14, which in turn moves the moving block 15 along the guide rod 27. The moving block 15 then moves the fixed block 16, which in turn moves the limiting ring 17. When the rotating shaft 9 rotates, it also moves the limiting ring 17, causing it to move up and down reciprocally. This reciprocating motion of the limiting ring 17, in turn, moves the rotating shaft 9 up and down, which in turn moves the agitating rod 11 up and down, resulting in more comprehensive agitation of the coarse and fine quartz sand 5 and 6, further improving the backwashing effect and efficiency.

[0025] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A backwashable quartz sand filter tank for wastewater treatment, comprising a filter tank, characterized in that, The inner wall of the filter tank is fixedly connected to a coarse quartz sand grid, a fine quartz sand grid, and a storage screen. Coarse quartz sand is placed between the coarse quartz sand grid and the storage screen, and fine quartz sand is placed between the storage screen and the fine quartz sand grid. A water distributor is installed at the bottom of the fine quartz sand grid, and the water distributor is fixedly connected to the inner wall of the filter tank. A drive shaft passes through the top of the filter tank and is rotatably connected to the filter tank. A rotating shaft is fitted onto the bottom end of the drive shaft, and a slot adapted to the bottom end of the drive shaft is opened at the top of the rotating shaft. The bottom end of the drive shaft is placed in the slot, and the rotating shaft is slidably connected to the drive shaft. A stirring rod is installed between the coarse quartz sand screen and the storage screen, and between the fine quartz sand screen and the storage screen. The stirring rod is fixedly connected to a rotating shaft. A driving disc is fixedly connected to the outer wall of the driving shaft. The driving disc is inclined. Rollers are installed at the top and bottom of the driving disc. Fixed shafts pass through the two rollers. The rollers are rotatably connected to the fixed shafts. The same moving block is fixedly connected to the same side of the two fixed shafts. A fixed block is fixedly connected to the bottom end of the moving block near the rotating shaft. A limit ring is rotatably connected to the inner wall of the fixed block. The limit ring is sleeved on the rotating shaft and fixedly connected to the rotating shaft.

2. The backwashable quartz sand filter tank for wastewater treatment according to claim 1, characterized in that, The coarse quartz sand grid, fine quartz sand grid, and storage screen are all equipped with sealing rings, and the rotating shaft rotatably connects the sealing rings on the coarse quartz sand grid, fine quartz sand grid, and storage screen.

3. The backwashable quartz sand filter tank for wastewater treatment according to claim 1, characterized in that, The top outer wall of the filter tank is fixedly connected to a discharge pipe, and a sealing cap is fastened to the discharge pipe by bolts. The discharge pipe is located on top of the quartz sand coarse grid.

4. The backwashable quartz sand filter tank for wastewater treatment according to claim 3, characterized in that, A protective box is fixedly connected to the top inner wall of the filter tank. The protective box is fitted onto the rotating shaft, and the rotating shaft is rotatably connected to the protective box.

5. The backwashable quartz sand filter tank for wastewater treatment according to claim 4, characterized in that, Two guide rods are fixedly connected to the bottom inner wall of the protective box. The guide rods pass through the movable block, and the movable block is slidably connected to the guide rods.

6. The backwashable quartz sand filter tank for wastewater treatment according to claim 1, characterized in that, The bottom of the filter tank is equipped with an outlet pipe and an injection pipe, the injection pipe being connected to the input end of the water distributor, and the top of the filter tank is equipped with an inlet pipe.

7. The backwashable quartz sand filter tank for wastewater treatment according to claim 6, characterized in that, A bracket is fixedly connected to the top of the filter tank, a motor is fixedly connected to the top of the bracket, a drive shaft is fixedly connected to the output end of the motor, a bearing seat is fixedly connected to the top of the filter tank, and the drive shaft is fixedly connected to the inner wall of the inner ring of the bearing on the bearing seat.

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