Industrial wastewater treatment trickling filter

Abstract

The utility model discloses an industrial wastewater treatment aeration biological filter pool relates to aeration filter pool field, including aeration tank still includes the fixed mounting in the filler type filter screen of aeration tank inner chamber, the top of aeration tank is connected with the sewage inlet pipe of sewage discharge to aeration tank inner chamber, and the inner chamber of aeration tank is provided with the filter water outlet that supplies the clean water of filtering completion to discharge, still includes setting up in aeration tank, filler type filter screen is used for the cleaning mechanism of carrying out the cleaning to filler type filter screen, the cleaning mechanism includes transmission unit, cleaning unit. The utility model discloses through setting up the cleaning mechanism, can when needing to carry out the cleaning to filler type filter screen, in the process of carrying out the back cleaning to filler type filter screen, simultaneously starts drive motor, makes drive motor to drive cleaning rod axial reciprocating movement, carries out the cleaning to the biological membrane of filler type filter screen bottom, and the cleaning rod of simultaneous movement also will laterally reciprocating movement, further carries out the cleaning to the dirt that adheres on the filter screen, and further improves the cleaning efficiency.

Description

Technical Field

[0001] This utility model relates to the field of aerated filter beds, specifically an aerated biological filter bed for industrial wastewater treatment. Background Technology

[0002] The aerated biological filter technology was developed based on fully absorbing the advantages of foreign aerated biological filters (BAF). Its biggest feature is the use of a new type of spherical ceramic granule packing material. Microbial films grow on its surface and in the open cavity space. When sewage flows from bottom to top through the filter media layer, the microbial film absorbs organic pollutants in the sewage as nutrients for its own metabolism. Under the condition of aeration and oxygen supply provided in the lower part of the filter media layer, air and water are in an upward flow state, which enables the organic matter in the wastewater to be degraded aerobically and nitrify.

[0003] In the prior art, the filter plates at the bottom of the reaction tank that filter sewage can experience excessive biofilm growth during long-term use, which can clog the pores of the MBR membrane or filter screen, resulting in a reduction in the filtration efficiency of the filter plates. Backwashing is required to clean the filter plates. In order to further improve the cleaning efficiency, the excessive biofilm on the packing filter screen is scraped off, thereby further improving the aeration efficiency. This utility model proposes an aerated biological filter for industrial wastewater treatment. Utility Model Content

[0004] The purpose of this utility model is to provide an aerated biological filter for industrial wastewater treatment in order to solve the problems mentioned in the background.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an aerated biological filter for industrial wastewater treatment, comprising an aeration tank, and a packing filter screen fixedly installed in the inner cavity of the aeration tank. The top of the aeration tank is connected to a wastewater inlet pipe for discharging wastewater into the inner cavity of the aeration tank. The inner cavity of the aeration tank is provided with a filtered water outlet for discharging filtered clean water. The model also includes a cleaning mechanism installed in the aeration tank and on the packing filter screen for cleaning the packing filter screen.

[0006] The cleaning mechanism includes a transmission unit and a cleaning unit;

[0007] The cleaning unit is used to clean the bottom of the packing filter screen;

[0008] The transmission unit is used to increase the movement direction of the cleaning unit and improve cleaning efficiency.

[0009] As a further embodiment of this utility model: the cleaning unit includes a drive motor, a reciprocating lead screw, a movable block, and a cleaning rod;

[0010] The drive motor is installed inside the end chamber of the aeration tank, and the drive motor is used to provide power for the rotation of the reciprocating screw connected to the output end;

[0011] The reciprocating screw is rotatably connected to the inner cavity of the aeration tank and located below the packing filter screen. The outer layer of the reciprocating screw is fitted with two corrugated tubes to protect the reciprocating screw. One end of each of the two corrugated tubes is fixed to the end of a movable block, and the other end of each of the two corrugated tubes is fixedly connected to the inner wall of the aeration tank. The reciprocating screw is used to drive the movable block, which is connected to the outer wall via a slider, to move axially. The slider is internally engaged with two opposite threaded grooves on the outer wall of the reciprocating screw by ball bearings. A cleaning rod for cleaning the bottom of the packing filter screen is slidably fitted to the side end of the movable block.

[0012] As a further embodiment of this utility model: the transmission unit includes a guide rod, a fixed rod, and a guide groove;

[0013] The guide rod is fixed to the top of the cleaning rod. The guide rod is used to receive the arc-shaped side thrust from the guide groove as the cleaning rod moves axially, thereby driving the cleaning rod to move laterally. The fixing rod is fixed in the inner cavity of the packing filter screen and is located above the guide rod. The guide groove is opened at the bottom of the fixing rod, and the top of the guide rod extends into the inner cavity of the guide groove.

[0014] As a further embodiment of this utility model: the outer wall of the guide groove is distributed in an "S" shape at the bottom of the fixed rod, and a spherical protrusion extending into the inner cavity of the guide groove is fixed at the top of the guide rod.

[0015] As a further improvement of this utility model, the end cavity of the cleaning rod is formed with a groove for relative movement of the protruding part on the side of the movable block.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] By setting up a cleaning mechanism, when the packing filter needs cleaning, the drive motor can be started simultaneously during the backwashing process of the packing filter. The drive motor drives the cleaning rod to move axially back and forth to clean the biofilm at the bottom of the packing filter. At the same time, the moving cleaning rod will also move laterally back and forth to further clean the dirt adhering to the filter, thereby further improving the cleaning efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a cross-sectional view of the internal structure of the aeration tank of this utility model;

[0020] Figure 3This is a schematic diagram of the cleaning mechanism of this utility model.

[0021] In the diagram: 1. Aeration tank; 2. Packed filter screen; 3. Sewage inlet pipe; 4. Filtered water outlet; 5. Cleaning mechanism; 501. Drive motor; 502. Reciprocating screw; 503. Movable block; 504. Cleaning rod; 505. Guide rod; 506. Fixed rod; 507. Guide groove. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-3 In this embodiment of the present invention, an aerated biological filter for industrial wastewater treatment includes an aeration tank 1 and a packing filter screen 2 fixedly installed in the inner cavity of the aeration tank 1. The top of the aeration tank 1 is connected to a sewage inlet pipe 3 for discharging sewage into the inner cavity of the aeration tank 1. The inner cavity of the aeration tank 1 is provided with a filtered water outlet 4 for discharging filtered clean water. The filter screen 2 is also provided with a cleaning mechanism 5 for cleaning the packing filter screen 2.

[0024] The cleaning mechanism 5 includes a transmission unit and a cleaning unit;

[0025] The cleaning unit is used to clean the bottom of the packing filter screen 2;

[0026] The transmission unit is used to increase the movement direction of the cleaning unit and improve cleaning efficiency;

[0027] The cleaning unit includes a drive motor 501, a reciprocating lead screw 502, a movable block 503, and a cleaning rod 504;

[0028] The drive motor 501 is installed inside the end chamber of the aeration tank 1. The drive motor 501 is used to provide power for the rotation of the reciprocating screw 502 connected to the output end.

[0029] The reciprocating screw 502 is rotatably connected to the inner cavity of the aeration tank 1 and located below the packing filter screen 2. The outer layer of the reciprocating screw 502 is sleeved with two sections of corrugated pipe to protect the reciprocating screw 502. One end of each of the two corrugated pipes is fixed to the end of a movable block 503, and the other end of each of the two corrugated pipes is fixedly connected to the inner wall of the aeration tank 1. The reciprocating screw 502 is used to drive the outer wall to move axially through the movable block 503 sleeved by the slider. The inside of the slider is engaged with two opposite threaded grooves on the outer wall of the reciprocating screw 502 by ball bearings. The side end of the movable block 503 is slidably sleeved with a cleaning rod 504 for cleaning the bottom of the packing filter screen 2.

[0030] The transmission unit includes a guide rod 505, a fixed rod 506, and a guide groove 507;

[0031] The guide rod 505 is fixed to the top of the cleaning rod 504. The guide rod 505 is used to receive the arc-shaped side thrust from the guide groove 507 as the cleaning rod 504 moves axially, thereby driving the cleaning rod 504 to move laterally. The fixed rod 506 is fixed in the inner cavity of the packing filter screen 2 and is located above the guide rod 505. The guide groove 507 is opened at the bottom of the fixed rod 506, and the top of the guide rod 505 extends into the inner cavity of the guide groove 507.

[0032] In this embodiment: when the packing filter 2 needs to be cleaned, it is cleaned through the backwash nozzle. Simultaneously, the drive motor 501 is started, and the reciprocating screw 502 rotates. The rotating reciprocating screw 502 drives the movable block 503, which is connected to the slider on its outer wall, to move axially. This causes the movable block 503 to move axially along a threaded groove on the outer wall of the reciprocating screw 502. The threaded grooves with opposite directions of rotation are connected by a transition curve to form a closed helical track. The motion conversion is achieved by utilizing the thrust of the helical side on the slider, allowing the movable block 503 to move axially along the reciprocating screw 501. The outer wall of the filter screen 2 moves axially back and forth, and the moving movable block 503 will also drive the cleaning rod 504 with the end sliding sleeve to move synchronously. The bottom of the packing filter screen 2 is cleaned by the moving reciprocating screw 502. At the same time, the moving cleaning rod 504 drives the guide rod 505 to move synchronously, so that the guide rod 505 moves laterally along the inner cavity of the guide groove 507, and the cleaning rod 504 moves relative to the end protrusion of the movable block 503. This achieves axial cleaning of the packing filter screen 2 and lateral cleaning of the packing filter screen 2 at the same time, cleaning up excess biofilm, improving cleaning efficiency and reducing cleaning dead corners.

[0033] Please refer to this carefully. Figures 1-3The outer wall of the guide groove 507 is in an "S" shape and distributed at the bottom of the fixed rod 506. The top of the guide rod 505 is fixed with a spherical protrusion extending into the inner cavity of the guide groove 507. The inner cavity of the end of the cleaning rod 504 is formed with a sliding groove for relative movement of the side protrusion of the movable block 503.

[0034] In this embodiment: the guide groove 507 with an "S" shape design allows the guide rod 505 to move synchronously with the cleaning rod 504 in an "S" shape as the cleaning rod 504 moves axially. Specifically, the cleaning rod 504 moves back and forth along the outer wall of the end protrusion of the movable block 503 during the axial movement.

[0035] 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. An aerated biological filter for industrial wastewater treatment, comprising an aeration tank (1), characterized in that, It also includes a packing filter screen (2) fixedly installed in the inner cavity of the aeration tank (1), the top of the aeration tank (1) is connected to a sewage inlet pipe (3) for sewage to be discharged into the inner cavity of the aeration tank (1), the inner cavity of the aeration tank (1) is provided with a filtered water outlet (4) for the filtered water to be discharged, and also includes a cleaning mechanism (5) provided on the aeration tank (1) and the packing filter screen (2) for cleaning the packing filter screen (2); The cleaning mechanism (5) includes a transmission unit and a cleaning unit; The cleaning unit is used to clean the bottom of the packing filter (2); The transmission unit is used to increase the movement direction of the cleaning unit and improve cleaning efficiency.

2. The industrial wastewater treatment aerated biological filter according to claim 1, characterized in that, The cleaning unit includes a drive motor (501), a reciprocating lead screw (502), a movable block (503), and a cleaning rod (504); The drive motor (501) is installed inside the end chamber of the aeration tank (1), and the drive motor (501) is used to provide power for the rotation of the reciprocating screw (502) connected to the output end; The reciprocating screw (502) is rotatably connected to the inner cavity of the aeration tank (1) and located below the packing filter screen (2). The outer layer of the reciprocating screw (502) is sleeved with two corrugated pipes to protect the reciprocating screw (502). One end of each of the two corrugated pipes is fixed to the end of a movable block (503), and the other end of each of the two corrugated pipes is fixedly connected to the inner wall of the aeration tank (1). The reciprocating screw (502) is used to drive the movable block (503) connected to the outer wall through the slider to move axially. The slider is engaged with two opposite threaded grooves on the outer wall of the reciprocating screw (502) by ball bearings. The side end of the movable block (503) is slidably sleeved with a cleaning rod (504) for cleaning the bottom of the packing filter screen (2).

3. The industrial wastewater treatment aerated biological filter according to claim 1, characterized in that, The transmission unit includes a guide rod (505), a fixed rod (506), and a guide groove (507); The guide rod (505) is fixed to the top of the cleaning rod (504). The guide rod (505) is used to receive the arc-shaped side thrust from the guide groove (507) as the cleaning rod (504) moves axially, thereby driving the cleaning rod (504) to move laterally. The fixing rod (506) is fixed in the inner cavity of the packing filter (2) and is located above the guide rod (505). The guide groove (507) is opened at the bottom of the fixing rod (506), and the top of the guide rod (505) extends into the inner cavity of the guide groove (507).

4. The industrial wastewater treatment aerated biological filter according to claim 3, characterized in that, The outer wall of the guide groove (507) is distributed in an "S" shape at the bottom of the fixed rod (506), and the top of the guide rod (505) is fixed with a spherical protrusion extending into the inner cavity of the guide groove (507).

5. An aerated biological filter for industrial wastewater treatment according to claim 2, characterized in that, The end cavity of the cleaning rod (504) is formed with a groove for relative movement of the side protrusion of the movable block (503).

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