V-shaped filter tank capable of removing COD (Chemical Oxygen Demand) in sewage

Abstract

The utility model discloses a V-shaped filter tank capable of removing COD (Chemical Oxygen Demand) in sewage, which comprises a tank body, an inner cavity of the tank body is divided into a filter area and a sewage discharge area by a partition plate, a ceramsite aggregate layer, an air distribution layer, a quartz sand filter material layer and a supporting layer are sequentially arranged in the filter area from top to bottom, the air distribution layer comprises a plurality of aeration pipes, the quartz sand filter material layer is supported by the supporting layer, and the aeration pipes are communicated with the filter area. An integral pouring filter plate provided with a long-handle filter head is arranged on the lower side of the supporting layer, a V-shaped water inlet groove is formed in the upper side of the ceramsite aggregate layer, the height of the V-shaped water inlet groove is larger than that of the top of the partition plate, backwashing air pipes communicated with a plurality of aeration pipes and backwashing water pipes communicated with overflowing holes are arranged in the pollution discharge area, and the backwashing water pipes are arranged at the bottom of the pollution discharge area. An overflowing hole is formed in the bottom of the filtering area. The V-shaped filter tank can effectively remove COD (Chemical Oxygen Demand) in sewage while ensuring the filtering precision and the filtering effect of the sewage, can be used as a front-end treatment device of a water treatment process, effectively saves the occupied area and relieves the subsequent treatment load.

Description

Technical Field

[0001] The utility model belongs to the field of sewage treatment, and in particular relates to a V-shaped filter tank capable of removing COD in sewage. Background Art

[0002] Filtration is an important step in sewage treatment and tap water production, and is an important guarantee for the stable and standard-compliant effluent. In water treatment, the role of filtration is to remove tiny suspended solids and colloids that cannot be removed by biological treatment and chemical clarification, and to improve the quality of effluent. The filtration device in water treatment is a filter tank, of which the V-type filter tank is a commonly used one.

[0003] The V-type filter is a fast filter with a constant water level. It is commonly used in sewage and tap water filtration. It is named because the water inlet is V-shaped. It is also called a uniform particle filter (its filter material uses homogeneous filter material, that is, uniform particle size filter material) and a six-valve filter (there are six main valves on various pipelines). The V-type filter uses a single layer of homogeneous quartz sand as the filter material. Quartz sand has high strength, strong chemical stability, is easy to obtain, and is inexpensive. It is a commonly used filter material. Quartz sand filter material with a diameter of 1-1.5mm is mostly selected in the V-type filter. The traditional V-type filter (sand filter) has the advantages of high degree of automation, thorough backwashing, long filtration cycle, good effluent water quality, high effluent efficiency, water saving and energy saving, etc., so it is widely used.

[0004] After a period of operation, the V-type filter needs to be backwashed. The backwash cycle and backwash time are determined according to the actual operation conditions. Large flow and high suspended solids sewage need to shorten the backwash cycle and increase the backwash time. Therefore, the operation and treatment effect of the front-end sedimentation and filtration device have a greater impact on the operation of the V-type filter. In addition, since the V-type filter uses physical filtration to remove impurities and solid particles in sewage, in sewage treatment, the SS removal effect in sewage is obvious, but the COD removal rate in sewage is sometimes not ideal. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a V-shaped filter tank that can remove COD in sewage. The V-shaped filter tank can effectively remove COD in sewage while ensuring the filtering accuracy and filtering effect of sewage. The V-shaped filter tank can be used as a front-end processing device of a water treatment process, effectively saving floor space and alleviating subsequent processing load.

[0006] The technical solution adopted by the utility model to solve the above technical problems is: a V-shaped filter tank capable of removing COD in sewage, comprising a tank body, wherein the inner cavity of the tank body is divided into a filter area and a sewage discharge area by a vertically arranged partition, wherein a ceramsite granular material layer, an air distribution layer, a quartz sand filter material layer and a supporting layer are arranged in sequence from top to bottom in the filter area, wherein the air distribution layer comprises a plurality of aeration pipes with air holes opened at the bottom, wherein the quartz sand filter material layer is supported by the supporting layer, wherein a whole cast filter plate is arranged at the lower side of the supporting layer, wherein a plurality of mounting holes are evenly opened on the whole cast filter plate, wherein a long-handled filter head with a filter cap facing upward is vertically installed at each of the mounting holes, and a gas balance groove is connected to the lower side of the plurality of mounting holes A V-shaped water inlet trough is arranged on the upper side of the ceramsite aggregate layer, and the V-shaped water inlet trough is arranged on the side of the pool body away from the sewage discharge area. The height of the top of the V-shaped water inlet trough is higher than the height of the top of the partition. A backwashing air pipe and a backwashing water pipe are arranged in the sewage discharge area. The backwashing air pipe is communicated with the several aeration pipes, and the backwashing air pipe is used to provide backwashing air required for air washing. The backwashing water pipe is arranged at the bottom of the sewage discharge area, and a flow hole is arranged at the bottom of the filtration area. The backwashing water pipe is communicated with the flow hole, and the backwashing water pipe is used to provide backwashing water required for water washing and discharge the water in the flow hole.

[0007] The utility model uses a ceramsite granular layer as a biological carrier for biofilm formation, and filters sewage through the cooperation of the ceramsite granular layer and the quartz sand filter material layer, with high filtration accuracy and good filtration effect. The working process of the V-type filter tank of the utility model is as follows: sewage enters the V-type filter tank through a V-type water inlet trough, and is first biologically aerated and filtered and purified through the ceramsite granular layer, and then purified by the quartz filter material layer to efficiently remove COD in the sewage, and then enters the flow hole after being filtered by a number of long-handled filter heads, and finally discharged from the backwashing water pipe. When the filter tank needs to be backwashed by air washing, compressed air is introduced into a number of aeration pipes through the backwashing air pipe, and the pressurized air is discharged through the air holes at the bottom of the aeration pipes and enters the water body in the filtration area and flows upward, thereby achieving air washing of the ceramsite granular layer. When the filter tank needs to be backwashed by water washing, backwashing water is introduced into the flow hole through the backwashing water pipe, and the backwashing water flows from bottom to top, thereby achieving water washing of the ceramsite granular layer. During the air washing and water washing process, excess water enters the V-shaped water inlet trough, while dirt with a density greater than water goes over the partition and enters the sewage discharge area for subsequent centralized treatment.

[0008] Preferably, a support frame is provided on the lower side of the expanded clay aggregate layer, the plurality of aeration pipes are supported by the support frame, a main air pipe is installed on the support frame, the plurality of aeration pipes are respectively connected to the main air pipe, and the air inlet of the main air pipe is connected to the backwash air pipe.

[0009] As a further preference, the main air pipe is arranged along the inner circumferential wall of the filtering area, and the plurality of aeration pipes are connected side by side and arranged inside the main air pipe to ensure a larger aeration range and avoid dead corners.

[0010] Preferably, a baffle is horizontally arranged in the middle of the sewage discharge area, a maintenance manhole is arranged on the baffle, a detachable flange blind plate is installed on the maintenance manhole, the baffle and the flange blind plate separate the sewage discharge area into an upper area and a lower area, and the backwash air pipe and the backwash water pipe are arranged in the lower area.

[0011] Compared with the prior art, the utility model has the following advantages: the V-type filter tank that can remove COD in sewage uses a ceramsite granular material layer as a biological carrier to form a biofilm, and the sewage is filtered through the cooperation of the ceramsite granular material layer and the quartz sand filter material layer, with high filtering accuracy and good filtering effect. The utility model applies biological aeration technology to the V-type filter tank, organically combines biological aeration technology and the V-type filter tank into one, and can effectively remove COD in sewage while ensuring the filtering accuracy and filtering effect of sewage. The V-type filter tank of the utility model can be used as a front-end processing device of the water treatment process, effectively saving floor space and alleviating the subsequent processing load. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic longitudinal section diagram of a V-shaped filter tank capable of removing COD from sewage in an embodiment;

[0013] Figure 2 for Figure 1 Middle AA section view;

[0014] Figure 3 for Figure 1 Enlarged view of point B in the middle;

[0015] The specific reference numerals in the figure are as follows:

[0016] 1-tank body, 11-partition, 12-filtration area, 13-drainage area, 14-flow hole, 15-baffle, 16-manhole, 17-flange blind plate, 18-upper area, 19-lower area, 2-ceramsite material layer, 21-V-shaped water inlet trough, 3-aeration pipe, 31-support frame, 32-main air pipe, 33-air inlet, 4-quartz sand filter material layer, 5-support layer, 6-integrally cast filter plate, 61-installation hole, 62-long handle filter head, 63-gas balance tank, 7-backwash air pipe, 8-backwash water pipe. DETAILED DESCRIPTION

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0018] The V-type filter tank that can remove COD in sewage in the embodiment is as follows: Figure 1 to Figure 3 As shown, it includes a tank body 1, the inner cavity of the tank body 1 is divided into a filter area 12 and a sewage discharge area 13 by a vertically arranged partition 11, and a ceramsite granular material layer 2, an air distribution layer, a quartz sand filter material layer 4 and a supporting layer 5 are arranged in sequence from top to bottom in the filter area 12, the air distribution layer includes a plurality of aeration pipes 3 with air holes opened at the bottom, the quartz sand filter material layer 4 is supported by the supporting layer 5, and a whole cast filter plate 6 is arranged on the lower side of the supporting layer 5, and a plurality of mounting holes 61 are evenly opened on the whole cast filter plate 6, and a long-handled filter head 62 with a filter cap facing upward is vertically installed at each mounting hole 61, and a gas balance tank 63 is connected to the lower side of the plurality of mounting holes 61, and the ceramsite granular material layer 2 is provided with a plurality of aeration pipes 3 with air holes opened at the bottom, and the quartz sand filter material layer 4 is supported by the supporting layer 5, and a whole cast filter plate 6 is arranged on the lower side of the supporting layer 5, and a plurality of mounting holes 61 are evenly opened on the whole cast filter plate 6, and a plurality of mounting holes 61 are vertically installed at each mounting hole 61, and a long-handled filter head 62 with a filter cap facing upward is vertically installed at each mounting hole 61, and a plurality of mounting holes 61 are connected to a gas balance tank 63 at the lower side. A V-shaped water inlet groove 21 is arranged on the upper side, and the V-shaped water inlet groove 21 is arranged on the side of the pool body 1 away from the sewage discharge area 13. The height of the top of the V-shaped water inlet groove 21 is higher than the height of the top of the partition 11. A backwashing air pipe 7 and a backwashing water pipe 8 are arranged in the sewage discharge area 13. The backwashing air pipe 7 is communicated with a plurality of aeration pipes 3. The backwashing air pipe 7 is used to provide backwashing air required for air washing. The backwashing water pipe 8 is arranged at the bottom of the sewage discharge area 13. A flow hole 14 is arranged at the bottom of the filter area 12. The backwashing water pipe 8 is communicated with the flow hole 14. The backwashing water pipe 8 is used to provide backwashing water required for water washing and discharge the water in the flow hole 14.

[0019] In this embodiment, a support frame 31 is provided on the lower side of the expanded clay aggregate layer 2, and a plurality of aeration pipes 3 are supported by the support frame 31. A main air pipe 32 is installed on the support frame 31. The plurality of aeration pipes 3 are respectively communicated with the main air pipe 32, and the air inlet 33 of the main air pipe 32 is communicated with the backwash air pipe 7. Specifically, the main air pipe 32 is arranged along the inner circumferential wall of the filtration area 12, and the plurality of aeration pipes 3 are connected side by side on the inner side of the main air pipe 32.

[0020] In this embodiment, a baffle 15 is horizontally arranged in the middle of the sewage discharge area 13, and an inspection manhole 16 is arranged on the baffle 15. A detachable flange blind plate 17 is installed on the inspection manhole 16. The baffle 15 and the flange blind plate 17 separate the sewage discharge area 13 into an upper area 18 and a lower area 19, and the backwash air pipe 7 and the backwash water pipe 8 are arranged in the lower area 19.

[0021] The working process of the above-mentioned V-type filter is as follows: sewage enters the V-type filter through the V-shaped water inlet trough 21, is firstly subjected to biological aeration and filtration purification through the ceramsite granular material layer 2, and then is purified by the quartz filter material layer 4 to efficiently remove COD in the sewage, and then is filtered through a number of long-handled filter heads 62 and enters the flow hole 14, and finally is discharged through the backwash water pipe 8.

[0022] When the filter needs to be backwashed by air washing, compressed air is introduced into the aeration pipes 3 through the backwashing air pipe 7, and the pressurized air is discharged through the air holes at the bottom of the aeration pipes 3 and flows upward into the water body in the filtration area 12, thereby achieving air washing of the ceramsite granular material layer 2. When the filter needs to be backwashed by water washing, backwashing water is introduced into the flow holes 14 through the backwashing water pipe 8, and the backwashing water flows from bottom to top, thereby achieving water washing of the ceramsite granular material layer 2.

[0023] During the air washing and water washing process, excess water enters the V-shaped water inlet trough 21, while dirt with a density greater than that of water goes over the partition 11 and enters the sewage discharge area 13, which is convenient for subsequent centralized treatment.

[0024] The V-shaped filter tank also includes other components that enable the V-shaped filter tank to be used normally, which are all conventional technical means in the art. The devices or components not limited in the utility model all adopt conventional technical means in the art.

Claims

1. A V-type filter tank capable of removing COD from sewage, characterized in that: The utility model comprises a pool body, wherein the inner cavity of the pool body is divided into a filter area and a sewage discharge area by a vertically arranged partition plate, wherein a ceramsite granular material layer, an air distribution layer, a quartz sand filter material layer and a supporting layer are arranged in sequence from top to bottom in the filter area, wherein the air distribution layer comprises a plurality of aeration pipes with air holes opened at the bottom, wherein the quartz sand filter material layer is supported by the supporting layer, wherein a whole cast filter plate is arranged at the lower side of the supporting layer, wherein a plurality of mounting holes are evenly opened on the whole cast filter plate, wherein a long-handled filter head with a filter cap facing upward is vertically installed at each of the mounting holes, wherein the lower sides of the plurality of mounting holes are connected with an air balance tank, and a V-shaped water inlet tank is arranged at the upper side of the ceramsite granular material layer The V-shaped water inlet trough is arranged on the side of the pool body away from the sewage discharge area, the height of the top of the V-shaped water inlet trough is higher than the height of the top of the partition, a backwashing air pipe and a backwashing water pipe are arranged in the sewage discharge area, the backwashing air pipe is communicated with the several aeration pipes, the backwashing air pipe is used to provide the backwashing air required for air washing, the backwashing water pipe is arranged at the bottom of the sewage discharge area, the bottom of the filtration area is provided with an overflow hole, the backwashing water pipe is communicated with the overflow hole, and the backwashing water pipe is used to provide the backwashing water required for water washing and discharge the water in the overflow hole.

2. A V-type filter tank capable of removing COD from sewage according to claim 1, characterized in that: A support frame is arranged at the lower side of the ceramsite aggregate layer, the plurality of aeration pipes are supported by the support frame, a main air pipe is installed on the support frame, the plurality of aeration pipes are respectively communicated with the main air pipe, and the air inlet of the main air pipe is communicated with the backwash air pipe.

3. A V-type filter for removing COD from sewage according to claim 2, characterized in that: The main air pipe is arranged along the inner peripheral wall of the filtering area, and the plurality of aeration pipes are connected side by side and arranged on the inner side of the main air pipe.

4. A V-type filter for removing COD from sewage according to claim 1, characterized in that: A baffle is horizontally arranged in the middle of the sewage discharge area, a maintenance manhole is arranged on the baffle, a detachable flange blind plate is installed on the maintenance manhole, the baffle and the flange blind plate separate the sewage discharge area into an upper area and a lower area, and the backwash air pipe and the backwash water pipe are arranged in the lower area.

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