Denitrification filter tank for sewage treatment

Abstract

The utility model provides a denitrification filter tank for sewage treatment, which belongs to the technical field of sewage treatment, and comprises a filter tank, a water and gas distribution filter brick, a supporting layer, a filter material layer, a push plate, an elastic telescopic frame and an adjusting piece, the water and gas distribution filter brick, the supporting layer and the filter material layer are sequentially arranged in the filter tank from bottom to top, a backwashing assembly is arranged at the bottom of the filter tank, and the adjusting piece is arranged in the filter tank. Water inlet weirs are arranged on the two sides of the filter respectively, collecting tanks are arranged at one ends of the water inlet weirs, guide rods are arranged above the water inlet weirs, elastic telescopic frames are slidably connected to the guide rods, the telescopic ends of the elastic telescopic frames are connected with push plates, the push plates are connected with adjusting pieces, adjusting rails are arranged on the filter, the adjusting pieces are slidably connected to the adjusting rails, and a driving mechanism is installed on the filter. An effluent weir is arranged at the bottom of the filter tank. According to the utility model, algal blooms and scum in the water inlet weir can be pushed into the collecting tank, the algal blooms or scum can be effectively prevented from entering the filter tank through the water inlet weir, sewage can be subjected to filtration and denitrification, and the backwashing assembly can keep the filtration and denitrification effects of the filter material layer.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a denitrification filter for sewage treatment. Background Art

[0002] The denitrification filter uses quartz sand as the film hanging medium for denitrifying organisms to remove nitrate nitrogen and suspended solids. The denitrification filter is divided into two forms: up-flow and down-flow according to the hydraulic flow pattern. The sewage of the down-flow denitrification filter overflows from the upper inlet weir into the lower filter material area. When the water level in the inlet weir is lower than its upper outlet, the sewage stands still in the inlet weir and cannot flow into the filter material area of the filter for the next stage of treatment. Moreover, due to the eutrophication of sewage, water blooms are likely to occur in the sewage. When the subsequent sewage to be treated enters the inlet weir and the water level is higher than the upper outlet of the inlet weir, the water bloom will enter the filter material area of the filter along with the sewage, affecting the sewage treatment effect. Content of the Utility Model

[0003] The utility model provides a denitrification filter for sewage treatment, aiming to solve the existing problems.

[0004] In order to achieve the above object, the utility model adopts the following technical scheme:

[0005] A denitrification filter for sewage treatment, comprising a filter tank, a water distribution and air distribution filter brick, a supporting layer, a filter material layer, a push plate, an elastic telescopic frame and an adjusting member. The water distribution and air distribution filter brick, the supporting layer and the filter material layer are arranged in the filter tank from bottom to top in sequence. An anti-flushing assembly located below the water distribution and air distribution filter brick is arranged at the bottom of the filter tank. Inlet weirs are respectively arranged on both sides of the filter tank. A filtering baffle is arranged on one side of the inlet weir. A collecting tank is arranged at one end of the inlet weir. A guiding rod connected to the filter tank is arranged above the inlet weir. An elastic telescopic frame is slidably connected to the guiding rod. The telescopic end of the elastic telescopic frame is connected to the push plate. The push plate is connected to the adjusting member. An adjusting rail is arranged on the filter tank. The adjusting member is slidably connected to the adjusting rail. The adjusting member is used for adjusting the length of the elastic telescopic frame. A driving mechanism for driving the elastic telescopic frame to move is installed on the filter tank. An outlet weir is arranged at the bottom of the filter tank.

[0006] Preferably, the adjusting member comprises an elastic telescopic rod a, a first universal wheel and a second universal wheel. The fixed end of the elastic telescopic rod a is connected to the push plate. The first universal wheel and the second universal wheel are respectively connected to the movable end of the elastic telescopic rod a. The first universal wheel and the second universal wheel are vertically arranged. The first universal wheel and the second universal wheel are slidably connected to the adjusting rail.

[0007] Preferably, the adjusting rail includes a horizontal sliding rail and an adjusting sliding rail. The horizontal sliding rail and the adjusting sliding rail are respectively arranged on the side wall of the filter tank. The adjusting sliding rail is located above the horizontal sliding rail. Guide sections are respectively arranged at both ends of the adjusting sliding rail, and a guide surface is arranged on the guide section away from one end of the collecting tank.

[0008] Preferably, the backwashing assembly includes an air washing main pipe, a water washing main pipe, an air washing square pipe, a water washing square pipe, a plurality of air washing branch pipes and a plurality of water washing branch pipes. The air washing main pipe is communicated with the air washing square pipe. The air washing square pipe is communicated with a plurality of air washing branch pipes. The water washing main pipe is communicated with the water washing square pipe. The water washing square pipe is communicated with a plurality of water washing branch pipes. The air washing main pipe is communicated with an air source, and the water washing main pipe is communicated with a water source.

[0009] Preferably, a buffer area is arranged on one side of the filter tank, and the buffer area is communicated with the water inlet weir.

[0010] Preferably, a guide plate is arranged on one side of the collecting tank.

[0011] Preferably, the driving mechanism includes a motor and a lead screw. The motor is used to drive the lead screw to rotate. The lead screw is threadedly connected with the elastic telescopic frame, and the lead screw is rotatably connected with the filter tank.

[0012] Preferably, the elastic telescopic frame includes an elastic telescopic rod b and a moving seat. A threaded connection groove and a guide groove are arranged on the moving seat. The guide groove is slidably connected with a guide rod. The threaded connection groove is threadedly connected with the lead screw. The fixed end of the elastic telescopic rod b is fixed on the moving seat, and the movable end of the elastic telescopic rod b is connected with a push plate.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] The denitrification filter tank for sewage treatment provided by the present invention can push the push plate to collect the algal blooms and floating scum generated in the water inlet weir into the collecting tank and discharge them through the collecting tank, without manual cleaning, and effectively avoid the algal blooms or floating scum from entering the filter tank through the water inlet weir; the filter material layer can filter and denitrify the sewage; the backwashing assembly can perform air backwashing, water backwashing or air-water combined backwashing on the filter material layer to maintain the filtering and denitrifying function of the filter material layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional structural schematic diagram of a denitrification filter tank for sewage treatment according to the present invention;

[0016] Figure 2 is Figure 1 an enlarged structural schematic diagram of a partial area A in

[0017] Figure 3 is Figure 1 an enlarged structural schematic diagram of a partial area B in

[0018] Figure 4 This is a three-dimensional structural schematic diagram of a denitrification filter for sewage treatment according to the present utility model;

[0019] Figure 5 This is a top-view structural schematic diagram of a denitrification filter for sewage treatment according to the present utility model;

[0020] Figure 6 is Figure 5 an enlarged structural schematic diagram of A-A in

[0021] Figure 7 is Figure 5 an enlarged structural schematic diagram of B-B in

[0022] Figure 8 is Figure 5 an enlarged structural schematic diagram of C-C in

[0023] Figure 9 is Figure 8 an enlarged structural schematic diagram of the partial C in

[0024] In the figure, 1, filter tank; 2, water distribution and air distribution filter brick; 3, support layer; 4, filter media layer; 5, push plate; 6, elastic telescopic frame; 7, elastic telescopic rod b; 8, moving seat; 9, threaded connection groove; 10, screw thread; 11, adjusting member; 12, elastic telescopic rod a; 13, first universal wheel; 14, second universal wheel; 15, backwashing assembly; 16, air washing main pipe; 17, air washing square pipe; 18, water washing square pipe; 19, air washing branch pipe; 20, water washing branch pipe; 21, water inlet weir; 22, filter baffle; 23, collection tank; 24, guide rod; 25, adjusting rail; 26, horizontal slide rail; 27, adjusting slide rail; 28, guiding section; 29, guiding surface; 30, guiding plate; 31, cover plate; 32, screw rod; 33, water outlet weir; 34, buffer zone. Detailed implementation manners

[0025] In order to better understand the technical content of the present utility model, specific embodiments are provided below, and the present utility model will be further described in conjunction with the accompanying drawings.

[0026] Embodiment

[0027] Refer to Figures 1 to 9, A denitrification filter for sewage treatment provided by the utility model includes a filter tank 1, a water distribution and gas distribution filter brick 2, a supporting layer 3, a filter material layer 4, a push plate 5, an elastic telescopic frame 6 and an adjusting member 11. The water distribution and gas distribution filter brick 2, the supporting layer 3 and the filter material layer 4 are arranged in the filter tank 1 from bottom to top in sequence. The water distribution and gas distribution filter brick 2 can provide backwashing and uniform water distribution. The supporting layer 3 ensures the uniformity of water distribution and gas distribution and effectively avoids blockage. The filter material layer 4 realizes the filtration of suspended substances in water and realizes denitrification. The filter material layer 4 adopts quartz sand. A backwashing assembly 15 is arranged at the bottom of the filter tank 1 and below the water distribution and gas distribution filter brick 2. The filter material layer 4 is backwashed through the backwashing assembly 15 to maintain the filtration and denitrification function of the filter material layer 4. Water inlet weirs 21 are respectively arranged on both sides of the filter tank 1. A filtering baffle 22 is arranged on one side of the water inlet weir 21 to maintain the uniformity of water distribution and at the same time filter the water blooms floating on the water surface generated in the water inlet weir 21. A collection tank 23 is arranged at one end of the water inlet weir 21 to collect the water blooms floating in the water inlet weir 21 into the collection tank. A guide plate 30 is arranged on one side of the collection tank 23 to facilitate pushing the water blooms and other floating scum into the collection tank 23. A guide rod 24 connected to the filter tank 1 is arranged above the water inlet weir 21. An elastic telescopic frame 6 is slidably connected to the guide rod 24. The telescopic end of the elastic telescopic frame 6 is connected to the push plate 5. The push plate 5 moves in the water inlet weir 21 along the guide rod 24 through the elastic telescopic frame 6. The moving push plate 5 pushes the water blooms and floating scum into the collection tank 23. The push plate 5 is connected to the adjusting member 11. An adjusting rail 25 is arranged on the filter tank 1. The adjusting member 11 is slidably connected to the adjusting rail 25. The adjusting member 11 is used to adjust the length of the elastic telescopic frame 6. The adjusting member 11 slides on the adjusting rail 25 as the elastic telescopic frame 6 moves, thereby adjusting the length of the elastic telescopic frame 6. When the push plate 5 moves towards the end close to the collection tank 23, the elastic telescopic frame 6 extends, and the push plate 5 is immersed in the water in the water inlet weir 21, and the water blooms and floating scum floating in the water inlet weir 21 can be pushed into the collection tank 23. When the push plate 5 moves towards the end away from the collection tank 23, the elastic telescopic frame 6 contracts, and the push plate 5 moves upward above the water surface of the water inlet weir 21, which can prevent the push plate 5 from pushing the water blooms and floating scum in the water inlet weir 21 towards the end away from the collection tank 23. A driving mechanism for driving the elastic telescopic frame 6 to move is installed on the filter tank 1, which can drive the elastic telescopic frame 6 to move in the water inlet weir 21 along the guide rod 24. An outlet weir 33 is arranged at the bottom of the filter tank 1, and the filtered water is output from the outlet weir 33.

[0028] The adjusting member 11 includes an elastic telescopic rod a12, a first universal wheel 13 and a second universal wheel 14. The fixed end of the elastic telescopic rod a12 is connected to the push plate 5. The first universal wheel 13 and the second universal wheel 14 are respectively connected to the movable end of the elastic telescopic rod a12. The first universal wheel 13 and the second universal wheel 14 are vertically arranged. The first universal wheel 13 and the second universal wheel 14 are slidably connected to the adjusting rail 25. The adjusting rail 25 includes a horizontal slide rail 26 and an adjusting slide rail 27. The horizontal slide rail 26 and the adjusting slide rail 27 are respectively arranged on the side wall of the filter tank 1. The adjusting slide rail 27 is located above the horizontal slide rail 26. Guide sections 28 are respectively provided at both ends of the adjusting slide rail 27. A guide surface 29 is provided on the guide section 28 at the end away from the collection tank 23. When the adjusting member 11 slides from the adjusting slide rail 27 to the horizontal slide rail 26, the second universal wheel 14 acts on the guide surface 29, which can cause the elastic telescopic rod a12 to contract.

[0029] When the push plate 5 moves towards one end of the collection tank 23, the first universal wheel 13 is slidably connected to the horizontal chute, and the second universal wheel 14 is slidably connected to the side wall of the filter tank 1. The push plate 5 pushes the algal bloom and scum into the collection tank 23 along the guide plate 30. When the push plate 5 is located at the collection tank 23, the spring in the elastic telescopic rod a12 resets, and the elastic telescopic rod a12 extends to the guide section 28 of the adjusting slide rail 27. The push plate 5 moves along the guide rod 24 towards the end away from the collection tank 23. The second universal wheel 14 is slidably connected to the side wall of the filter tank 1, and the first universal wheel 13 moves upward along the guide section 28. Then, the push plate 5 is driven by the adjusting member 11 to move upward, the elastic telescopic frame 6 contracts, and the push plate 5 is located above the water surface of the water inlet weir 21, preventing the push plate 5 from pushing the algal bloom and scum that have not been completely pushed into the collection tank 23 towards the end away from the collection tank 23.

[0030] The backwashing assembly 15 includes an air washing main pipe 16, a water washing main pipe (not marked), an air washing square pipe 17, a water washing square pipe 18, a plurality of air washing branch pipes 19 and a plurality of water washing branch pipes 20. The air washing main pipe 16 is communicated with the air washing square pipe 17. The air washing square pipe 17 is communicated with a plurality of air washing branch pipes 19. The water washing main pipe is communicated with the water washing square pipe 18. The water washing square pipe 18 is communicated with a plurality of water washing branch pipes 20. The air washing main pipe 16 is communicated with an air source, and the water washing main pipe is communicated with a water source to backwash the filter material layer 4 to achieve air washing, water washing or combined air and water backwashing.

[0031] A buffer zone 34 is provided on one side of the filter tank 1. The buffer zone 34 is communicated with the water inlet weir 21 to reduce the water flow output entering the water inlet weir 21.

[0032] The driving mechanism includes a motor (not shown) and a lead screw 32. The motor (not shown) is used to drive the lead screw 32 to rotate. The lead screw 32 is threadedly connected to the elastic telescopic frame 6 and rotatably connected to the filter tank 1. Each lead screw 32 can be matched with one motor, or one motor can drive two lead screws 32 simultaneously through a transmission belt or a transmission chain.

[0033] The elastic telescopic frame 6 includes an elastic telescopic rod b7 and a moving seat 8. The moving seat 8 is provided with a threaded connection groove 9 and a guide groove. The guide groove is slidably connected to the guide rod 24. The threaded connection groove 9 is threadedly connected to the lead screw 32. When the lead screw 32 rotates, it drives the moving seat 8 to move along the guide rod 24. The fixed end of the elastic telescopic rod b7 is fixed to the moving seat 8, and the movable end of the elastic telescopic rod b7 is connected to the push plate 5. With the cooperation of the elastic telescopic rod b7 and the adjusting rail 25, the push plate 5 can be immersed in the water of the water inlet weir 21 or located above the water surface.

[0034] During use, sewage enters the water inlet weir 21 from the buffer zone 34. The sewage in the water inlet weir 21 is distributed to the filter tank 1 from top to bottom through the filter baffle 22. The filter material layer 4 filters and denitrifies the sewage, and then outputs from the water outlet weir 33 after passing through the supporting layer 3 and the water distribution and air distribution filter bricks 2. After being used for a period of time, when the filtering capacity decreases, the filter material layer 4 can be subjected to water backwashing, air backwashing or combined water and air backwashing through the backwashing assembly 15 to maintain the filtering and denitrification effect of the filter material layer 4. When water blooms or floating scum exist in the water inlet weir 21, the motor drives the lead screw 32 to rotate, driving the elastic telescopic frame 6 to move along the guide rod 24 to one side of the collection tank 23. The adjusting member 11 slides on the horizontal slide rail 26, pushing the water blooms and floating scum in the water inlet weir 21 into the collection tank 23. When the motor rotates in reverse, the elastic telescopic frame 6 moves along the guide rod 24 to the side away from the collection tank 23. The adjusting member 11 slides on the adjusting slide rail 27, lifting the push plate 5 upward, and the elastic telescopic member contracts, and the push plate 5 is located above the water surface of the water inlet weir 21.

[0035] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A denitrification filter for sewage treatment, characterized in that: The filter device comprises a filter tank, a water and air distribution filter brick, a supporting layer, a filter material layer, a push plate, an elastic telescopic frame and an adjusting member, wherein the water and air distribution filter brick, the supporting layer and the filter material layer are sequentially arranged in the filter tank from bottom to top, a backwashing assembly located below the water and air distribution filter brick is arranged at the bottom of the filter tank, water inlet weirs are respectively arranged on both sides of the filter tank, a filter baffle is arranged on one side of the water inlet weir, a collecting trough is arranged at one end of the water inlet weir, a guide rod connected to the filter tank is arranged above the water inlet weir, an elastic telescopic frame is slidably connected to the guide rod, the telescopic end of the elastic telescopic frame is connected to the push plate, the push plate is connected to the adjusting member, an adjusting rail is arranged on the filter tank, the adjusting member is slidably connected to the adjusting rail, the adjusting member is used to adjust the length of the elastic telescopic frame, a driving mechanism for driving the elastic telescopic frame to move is installed on the filter tank, and a water outlet weir is arranged at the bottom of the filter tank.

2. A denitrification filter for sewage treatment as claimed in claim 1, characterized in that: The adjusting member includes an elastic telescopic rod a, a first universal wheel and a second universal wheel, the fixed end of the elastic telescopic rod a is connected to the push plate, the first universal wheel and the second universal wheel are respectively connected to the movable ends of the elastic telescopic rod a, the first universal wheel and the second universal wheel are vertically arranged, and the first universal wheel and the second universal wheel are slidably connected to the adjusting rail.

3. A denitrification filter for sewage treatment as claimed in claim 2, characterized in that: The adjustment rail includes a horizontal slide rail and an adjustment slide rail, the horizontal slide rail and the adjustment slide rail are respectively arranged on the side walls of the filter tank, the adjustment slide rail is located above the horizontal slide rail, and the two ends of the adjustment slide rail are respectively provided with guide sections, and the guide section away from one end of the collection tank is provided with a guide surface.

4. A denitrification filter for sewage treatment as claimed in claim 1, characterized in that: The backwash component includes an air washing main pipe, a water washing main pipe, an air washing square pipe, a water washing square pipe, a plurality of air washing branch pipes and a plurality of water washing branch pipes. The air washing main pipe is connected to the air washing square pipe, the air washing square pipe is connected to a plurality of air washing branch pipes, the water washing main pipe is connected to the water washing square pipe, the water washing square pipe is connected to a plurality of water washing branch pipes, the air washing main pipe is connected to an air source, and the water washing main pipe is connected to a water source.

5. A denitrification filter for sewage treatment as claimed in claim 1, characterized in that: A buffer zone is provided on one side of the filter tank, and the buffer zone is communicated with the water inlet weir.

6. A denitrification filter for sewage treatment as claimed in claim 1, characterized in that: A guide plate is provided on one side of the collecting tank.

7. A denitrification filter for sewage treatment as claimed in claim 1, characterized in that: The driving mechanism comprises a motor and a screw rod, wherein the motor is used to drive the screw rod to rotate, the screw rod is threadedly connected to the elastic telescopic frame, and the screw rod is rotationally connected to the filter tank.

8. A denitrification filter for sewage treatment as claimed in claim 1, characterized in that: The elastic telescopic frame includes an elastic telescopic rod b and a moving seat, the moving seat is provided with a threaded connection groove and a guide groove, the guide groove is slidably connected to the guide rod, the threaded connection groove is threadedly connected to the screw rod, the fixed end of the elastic telescopic rod b is fixed on the moving seat, and the movable end of the elastic telescopic rod b is connected to the push plate.

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