Backwash denitrification deep bed filter

Abstract

The utility model provides a backwashing denitrification deep-bed filter tank which comprises a filter tank, a filter brick layer laid in the filter tank, a filter material layer arranged above the filter brick layer, and a backwashing pipe with one end arranged between the filter material layer and the filter brick layer, wherein a movable rod which is horizontally arranged and can axially pull and move is arranged in the filter tank and above the filter material layer; a fixed rod which is parallel to the movable rod and is axially fixed is arranged in the filter tank and close to the lower part of the filter material layer; a plurality of insertion pieces are inserted into the filter material layer, all the insertion pieces are arranged at intervals in the axial direction of the movable rod, the top ends of all the insertion pieces are movably connected with the movable rod, and the lower ends of all the insertion pieces are movably connected with the fixed rod. When the filter is used for backwashing, the movable rod is pulled to axially move so as to drive each insertion sheet to continuously swing left and right in the filter material layer, so that the filter material layer is loosened, air flow or water flow can better penetrate through the filter material layer, and the backwashing effect is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment, and particularly relates to an anti-flushing and denitrifying deep bed filter tank. Background Art

[0002] The structure of the deep bed filter tank allows suspended solids in water to penetrate deeper into the filter bed, which can improve the sewage interception capacity of the filter tank. The filtration process includes filtration and backwashing.

[0003] Deep bed filter tanks are usually used for removing suspended solids in water treatment. The filter bed is relatively deeper than that of traditional rapid filter tanks and is mostly a down-flow gravity filter tank. Its filter media are mostly one or more of natural quartz sand, anthracite, garnet, etc. The deep bed filter tank can also have the function of denitrification and nitrogen removal, synchronously removing suspended solids and nitrates. The filtration process of the deep bed filter tank includes filtration and backwashing. In the existing deep bed filter tank during the backwashing process, there are problems such as the caking of the filter media layer and poor washing effect. Summary of the Utility Model

[0004] In order to solve the technical problems existing in the background art, the utility model provides an anti-flushing and denitrifying deep bed filter tank.

[0005] An anti-flushing and denitrifying deep bed filter tank provided by the utility model includes: a filter tank, a filter brick layer laid in the filter tank, a filter media layer arranged above the filter brick layer, and an anti-flushing pipe with one end arranged between the filter media layer and the filter brick layer, wherein:

[0006] A horizontally arranged and axially pullable and movable rod is arranged above the filter media layer in the filter tank;

[0007] A fixed rod parallel to the movable rod and axially fixed is arranged in the filter tank at a position close to the lower part of the filter media layer;

[0008] A plurality of inserts are inserted into the filter media layer. All the inserts are arranged at intervals along the axial direction of the movable rod, and the top ends of all the inserts are respectively movably connected with the movable rod, and the lower ends of all the inserts are respectively movably connected with the fixed rod.

[0009] Preferably, a truss is erected above the filter tank, a sliding seat slidably installed on the truss, a pull rod connecting the sliding seat and the movable rod, and a first driving mechanism fixedly installed on the truss and connected with the sliding seat to drive the sliding seat to move axially along the movable rod.

[0010] Preferably, a first slideway extending vertically is provided on one side wall of the filter tank, and a second slideway opposite to the first slideway is provided on the other side thereof; sleeves axially movably assembled with the movable rod are respectively provided at both ends of the movable rod, and the sleeves at both ends of the movable rod are respectively slidably assembled in the first slideway and the second slideway; both ends of the fixed rod are respectively slidably assembled in the first slideway and the second slideway; the pull rod is vertically arranged and axially movably installed on the sliding seat; a second driving mechanism connected to the pull rod to drive the vertical movement of the pull rod is installed on the sliding seat.

[0011] Preferably, a vertically arranged rack is provided on one side of the pull rod; the second driving mechanism includes a gear meshing with the rack and a driving component connected to the gear to drive the rotation of the gear.

[0012] Preferably, sliders are respectively provided at both ends of the fixed rod, and the sliders at both ends thereof are respectively slidably assembled in the first slideway and the second slideway.

[0013] Preferably, flushing outlets are provided at positions on the backwashing pipe between any two adjacent inserting pieces.

[0014] Preferably, the inserting piece is an orifice plate or a grid plate.

[0015] Preferably, it further includes a flushing device connected to the backwashing pipe for supplying air or water.

[0016] In the present utility model, by arranging a movable rod above the filter media layer, arranging a fixed rod at a position close to the lower part of the filter media layer, and enabling the movable rod to axially draw and move, the fixed rod is axially fixed; meanwhile, a plurality of inserting pieces are inserted into the filter media layer, and the tops of all the inserting pieces are respectively movably connected to the movable rod, and the lower ends thereof are respectively movably connected to the fixed rod; during the backwashing operation, the movable rod is pulled axially to drive each inserting piece to continuously swing left and right in the filter media layer, so as to loosen the filter media layer, so that air flow or water flow can better penetrate the filter media layer, thereby improving the backwashing effect. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of an anti-washing denitrifying deep bed filter tank proposed by the present utility model. Detailed Embodiments

[0018] Refer to Figure 1 , an anti-washing denitrifying deep bed filter tank proposed by the present utility model includes: a filter tank 1, a filter brick layer 2 laid in the filter tank 1, a filter media layer 3 arranged above the filter brick layer 2, and a backwashing pipe 4 with one end arranged between the filter media layer 3 and the filter brick layer 2, wherein:

[0019] Inside the filter tank 1 and above the filter media layer 3, there is a horizontally arranged movable rod 5 that can be axially pulled and moved; inside the filter tank 1 and at a position near the lower part of the filter media layer 3, there is a fixed rod 6 parallel to the movable rod 5 and axially fixed;

[0020] A number of inserts 7 are inserted into the filter media layer 3. All the inserts 7 are arranged at axial intervals along the movable rod 5, and the tops of all the inserts 7 are respectively movably connected to the movable rod 5, and their lower ends are respectively movably connected to the fixed rod 6.

[0021] During backwashing operation, the movable rod 5 is pulled to move axially, driving each insert 7 to continuously swing left and right in the filter media layer 3, so as to loosen the filter media layer 3, and then enabling the backwashing air flow or water flow to better penetrate the filter media layer 3, achieving the purpose of enhancing the backwashing effect.

[0022] Furthermore, in this embodiment, a truss 8 is erected above the filter tank 1, a sliding seat 9 slidably mounted on the truss 8, a pull rod 10 connecting the sliding seat 9 and the movable rod 5, and a first driving mechanism 11 fixedly installed on the truss 8 and connected to the sliding seat 9 to drive the sliding seat 9 to move axially along the movable rod 5. During backwashing, the first driving mechanism 11 drives the sliding seat 9 to reciprocate axially along the movable rod 5, so as to drive the movable rod 5 to reciprocate axially, and then push the insert 7 to slide left and right, achieving the purpose of loosening the filter media layer 3.

[0023] Still further, on one side wall of the filter tank 1, there is a vertically extending first slideway, and on the other side, there is a second slideway arranged opposite to the first slideway; both ends of the movable rod 5 are respectively provided with sleeves axially movably assembled therewith, and the sleeves at both ends of the movable rod 5 are respectively slidably assembled in the first slideway and the second slideway; both ends of the fixed rod 6 are respectively slidably assembled in the first slideway and the second slideway; the pull rod 10 is vertically arranged and axially movably installed on the sliding seat 9, and on one side of the pull rod 10, there is a vertically arranged rack; a second driving mechanism 12 is installed on the sliding seat 9, and the second driving mechanism 12 includes a gear meshing with the rack and a driving component connected to the gear to drive the gear to rotate. The driving component in the second driving mechanism 12 drives its gear to rotate, and then pulls the insert 7 to move up or down through the pull rod 10, so as to adjust the insertion depth of the insert 7 in the filter media layer 3. In addition, during backwashing, the reciprocating movement of the insert 7 in the up and down direction can also be used to turn over the filter media layer 3, further enhancing the backwashing effect on the filter media layer 3.

[0024] Specifically, in this embodiment, both ends of the fixed rod 6 are respectively provided with sliders, and the sliders at both ends are respectively slidably assembled in the first slideway and the second slideway, so that the fixed rod 6 can smoothly slide in the first slideway and the second slideway.

[0025] In addition, in this embodiment, a flushing outlet is provided at a position on the backwashing pipe 4 between any two adjacent inserts 7.

[0026] In this embodiment, the insert 7 is an orifice plate or a grid plate, so that the filter material can pass through the insert 7, thereby reducing the resistance of the insert 7 to swing, and at the same time increasing the turning effect on the filter material.

[0027] In addition, a backwashing denitrification deep bed filter proposed by the present utility model further includes a flushing device connected to the backwashing pipe 4 for supplying gas or water.

[0028] As can be seen from the above, the present utility model arranges a movable rod 5 above the filter material layer 3, arranges a fixed rod 6 at a position close to the lower part of the filter material layer 3, and enables the movable rod 5 to axially draw and move, and the fixed rod 6 is axially fixed; at the same time, a plurality of inserts 7 are inserted into the filter material layer 3, and the tops of all the inserts 7 are respectively movably connected to the movable rod 5, and their lower ends are respectively movably connected to the fixed rod 6; during the backwashing operation, the movable rod 5 is pulled to axially move, so as to drive each insert 7 to continuously swing left and right in the filter material layer 3, so as to loosen the filter material layer 3, so that the air flow or water flow can better penetrate the filter material layer 3, thereby improving the backwashing effect.

[0029] The above is only a preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present utility model.

Claims

1. A backwash denitrification deep bed filter, comprising: A filter tank (1), a filter brick layer (2) laid in the filter tank (1), a filter material layer (3) arranged above the filter brick layer (2), and a backwash pipe (4) with one end arranged between the filter material layer (3) and the filter brick layer (2), characterized in that: A movable rod (5) which is horizontally arranged and can be pulled and moved axially is provided in the filter tank (1) and above the filter material layer (3); A fixed rod (6) parallel to the movable rod (5) and axially fixed is provided in the filter tank (1) and located near the bottom of the filter material layer (3); A plurality of inserts (7) are inserted in the filter material layer (3), and all the inserts (7) are arranged at axial intervals along the movable rod (5). The top ends of all the inserts (7) are movably connected to the movable rod (5), and the bottom ends are movably connected to the fixed rod (6).

2. The backwashing denitrification deep bed filter according to claim 1, characterized in that: A truss (8), a slide seat (9) slidably mounted on the truss (8), a pull rod (10) connecting the slide seat (9) and a movable rod (5), and a first driving mechanism (11) fixedly mounted on the truss (8) and connected to the slide seat (9) to drive the slide seat (9) to move axially along the movable rod (5) are arranged above the filter tank (1).

3. The backwashing denitrification deep bed filter according to claim 2, characterized in that: A first slide extending vertically is provided on the side wall of one side of the filter tank (1), and a second slide arranged opposite to the first slide is provided on the other side thereof; sleeves are respectively provided at both ends of the movable rod (5) and are axially movably assembled therewith, and the sleeves at both ends of the movable rod (5) are respectively slidably assembled in the first slide and the second slide; the two ends of the fixed rod (6) are respectively slidably assembled in the first slide and the second slide; the pull rod (10) is vertically arranged and axially movably installed on the slide seat (9), and a second driving mechanism (12) connected to the pull rod (10) to drive the pull rod (10) to move vertically is installed on the slide seat (9).

4. The backwashing denitrification deep bed filter according to claim 3, characterized in that: A vertically arranged rack is provided on one side of the pull rod (10); the second driving mechanism (12) comprises a gear meshing with the rack and a driving component connected to the gear to drive the gear to rotate.

5. The backwashing denitrification deep bed filter according to claim 3, characterized in that: Both ends of the fixed rod (6) are provided with sliding blocks respectively, and the sliding blocks at both ends are slidably assembled in the first slideway and the second slideway respectively.

6. The backwashing denitrification deep bed filter according to claim 1, characterized in that: A flushing outlet is provided on the backwash pipe (4) and located between any two adjacent inserts (7).

7. The backwashing denitrification deep bed filter according to claim 1, characterized in that: The insert (7) is a perforated plate or a grid plate.

8. The backwashing denitrification deep bed filter according to any one of claims 1 to 7, characterized in that: It also includes a flushing device connected to the backwashing pipe (4) for supplying air or water.

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