Integrated denitrification nitrogen removal filter tank

Abstract

The utility model relates to the technical field of sewage treatment, in particular to an integrated denitrification nitrogen removal filter tank which comprises a shell, a denitrification deep-bed filter tank is arranged at the middle end of the shell, filter bricks are arranged at the bottom end of the denitrification deep-bed filter tank, a supporting layer and a filter material are arranged above the filter bricks, the supporting layer is located between the filter bricks and the filter material, and the supporting layer is located between the filter bricks and the filter material. A backwashing tank and a mixing tank are arranged on the left side and the right side of the denitrification deep-bed filter tank respectively, a backwashing device and an air blower are arranged on the other side of the backwashing tank, a backwashing wastewater tank is arranged at the other end of the backwashing device, and the backwashing tank, the backwashing wastewater tank and the backwashing device are connected through water pipes; as the water outlet and the air outlet are both provided with the filter screens, quartz sand is prevented from directly entering the air supply chamber and the water supply chamber to cause blockage of the air supply chamber and the water supply chamber, so that the cost is saved, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to an integrated denitrification and denitrification filter tank. Background Art

[0002] At present, with the increasing prominence of water pollution in my country, the improvement of urban sewage treatment discharge standards has become a general trend. From the current requirements for improving water environment quality, the effluent from many urban sewage treatment plants is often discharged into urban rivers and becomes the water body of the river. The discharge standards for the effluent from existing sewage treatment plants in my country mostly refer to Class B or Class A in "GB18918-2002 Pollutant Discharge Standard for Urban Sewage Treatment Plants". However, for Class B or Class A standards, the water quality is only equivalent to Class V water of surface water. This kind of water quality is discharged into a water environment with almost no self-purification ability, resulting in the water body not only not being repaired, but being polluted, so the phenomenon of "the more it is treated, the dirtier it is" appears. The increasing pollution of water bodies urgently requires the effluent from sewage treatment plants to meet the Class IV standard of surface water.

[0003] During the denitrification process, as nitrate nitrogen is continuously reduced to nitrogen, a large amount of nitrogen will accumulate in the deep bed filter. These gases will cause the sewage to flow around the media, thus enhancing the contact between microorganisms and water flow, and also improving the filtration efficiency. However, when too many nitrogen bubbles accumulate in the pool, the filtration will produce air blockage, resulting in head loss, and it is necessary to use a nitrogen drive device to drive nitrogen regularly. At the same time, the continuous interception of suspended matter by the filter material will also increase the head loss. Once the filter material is severely blocked, backwashing is required to remove the intercepted solids. However, due to the high solid no-load and deep bed of the deep bed denitrification filter, high-intensity backwashing is required.

[0004] When combined air and water flushing is performed, the quartz sand in the filter material layer will surge with the water flow. When the flushing is completed, the quartz sand will settle and pass through the supporting layer into the filter bricks. Long-term accumulation can easily cause blockage of the filter bricks. Utility Model Content

[0005] In view of the above-mentioned technical deficiencies, the purpose of the utility model is to provide an integrated denitrification and denitrification filter tank, which aims to efficiently remove suspended matter trapped by filter material and prevent serious clogging of the filter material.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides an integrated denitrification and denitrification filter tank, comprising a shell, a denitrification deep bed filter tank is arranged at the middle end of the shell, a filter brick is arranged at the bottom end of the denitrification deep bed filter tank, a supporting layer and a filter material layer are arranged above the filter brick, and the supporting layer is located between the filter brick and the filter material layer, a backwashing tank and a mixing tank are arranged on the left and right sides of the denitrification deep bed filter tank, a backwashing device and a blower are arranged on the other side of the backwashing tank, a backwashing wastewater tank is arranged at the other end of the backwashing device, and the backwashing tank, the backwashing wastewater tank and the backwashing device are connected by a water pipe.

[0008] Preferably, the filter brick consists of a water delivery chamber and an air delivery chamber, with water outlets on both sides of the water delivery chamber and an air outlet at the top of the air delivery chamber. Both the air outlet and the water outlet are provided with filter screens, and the filter screens are fixedly connected to the air outlet and the water outlet.

[0009] Preferably, one end of the water delivery chamber is communicated with the bottom end of the mixing tank, a support block is provided in the middle of the water delivery chamber, and the support block is fixedly connected to the water delivery chamber.

[0010] Preferably, the air supply chamber and the blower are connected via an air pipe, and the air pipe is in a "J" shape, and the height of the air pipe is not lower than the shell.

[0011] Preferably, a frame is provided on the outside of the filter brick, and the frame is fixedly installed on the outside of the filter brick. At least two frames are provided, and the frames are arranged in an array along the filter brick.

[0012] Preferably, the denitrification deep bed filter tank facing the backwash tank side is provided with a gate, and the height of the gate is higher than the filter material layer.

[0013] The beneficial effects of the utility model are as follows: 1. The integrated denitrification and denitrification filter tank described in the utility model is equipped with filter screens at both the water outlet and the air outlet, thereby preventing quartz sand from directly entering the air delivery chamber and the water delivery chamber to cause blockage of the air delivery chamber and the water delivery chamber, thereby saving costs and improving work efficiency.

[0014] 2. The water outlet and the gas outlet of the utility model are both installed at the bottom of the denitrification deep bed filter, so that the rising direction of the water flow is consistent with the escape direction of the nitrogen. Only one set of blowers is always in operation to provide the gas source, and there is no need to add a clean water tank, thereby saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for use in the embodiments of the present utility model. Obviously, the drawings described below are only some embodiments of the present utility model, and for ordinary technicians in this field, other drawings can also be obtained based on these drawings without creative work.

[0016] Figure 1It is a structural diagram of the utility model.

[0017] Figure 2 It is a cross-sectional view of the utility model.

[0018] Figure 3 This is the structural diagram of the filter brick.

[0019] Figure 4 Cross-section of the tail filter brick.

[0020] Explanation of reference numerals: 1-shell, 2-supporting layer, 3-filter material layer, 4-backwashing tank, 5-mixing tank, 6-backwashing device, 7-blower, 8-backwashing wastewater tank, 9-water pipe, 10-air supply chamber, 11-water supply chamber, 12-water outlet, 13-air outlet, 14-filter screen, 15-support block, 16-trachea, 17-frame, 18-gate DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] like Figure 1 As shown, the integrated denitrification and denitrification filter comprises a shell 1, a denitrification deep bed filter is arranged at the middle end of the shell 1, a filter brick is arranged at the bottom end of the denitrification deep bed filter, the filter brick is integrally injection-molded by high-density polyethylene, has a supporting function, and has the characteristics of toughness, pressure resistance and non-deformation, and a supporting layer 2 and a filter material layer 3 are arranged above the filter brick, the supporting layer 2 is composed of graded gravel of different specifications, the filter material is homogeneous quartz sand, and the supporting layer 2 is located between the filter brick and the filter material layer 3, a backwashing tank 4 and a mixing tank 5 are respectively arranged on the left and right sides of the denitrification deep bed filter, and a backwashing device 6 and a blower 7 are arranged on the other side of the backwashing tank 4, a backwashing wastewater tank 8 is arranged at the other end of the backwashing device 6, and the backwashing tank 4, the backwashing wastewater tank 8 and the backwashing device 6 are connected by a water pipe 9.

[0023] like Figure 2-Figure 4As shown, the filter brick is composed of a water supply chamber 11 and an air supply chamber 10, and water outlets 12 are provided on both sides of the water supply chamber 11, and an air outlet 13 is provided at the top of the air supply chamber 10. The air outlet 13 and the water outlet 12 are both provided with a filter screen 14, and the filter screen 14 is fixedly connected to the air outlet 13 and the water outlet 12. When the air and water are flushed together, the quartz sand of the filter material layer 3 will surge with the water flow. When the flushing is completed, the quartz sand may pass through the supporting layer 2 and enter the filter brick. The addition of the filter screen 14 avoids the long-term accumulation of quartz sand and causes blockage in the water supply chamber 11 of the filter brick.

[0024] One end of the water delivery chamber 11 is communicated with the bottom end of the mixing tank 5, a support block 15 is provided in the middle of the water delivery chamber 11, and the support block 15 is fixedly connected to the water delivery chamber 11, so as to enhance the compression resistance of the filter brick.

[0025] The air supply chamber 10 and the blower 7 are connected via an air pipe 16 , and the air pipe 16 is in a “J” shape. The height of the air pipe 16 is not lower than the housing 1 to prevent water in the air pipe 16 from flowing into the blower 7 .

[0026] A frame 17 is provided on the outside of the filter brick, and the frame 17 is fixedly installed on the outside of the filter brick. At least two frames 17 are provided, and the frames 17 are arranged in an array along the filter brick, so as to further improve the compression resistance of the filter brick and make the filter brick not easily deformed.

[0027] The denitrification deep bed filter tank facing the backwash tank 4 is provided with a gate 18 , and the height of the gate 18 is higher than the filter material layer 3 , so as to prevent the quartz sand in the filter material layer 3 from flowing into the backwash tank 4 .

[0028] How it works;

[0029] The sewage in the mixing tank 5 flows from bottom to top through the water delivery chamber 11, passes through the supporting layer 2 and the filter material layer 3, and then flows into the backwashing from the gate 18. Through the backwashing device 6, part of the water flows into the backwashing device 6, and the other part flows into the mixing tank 5. When one grid is filtering, the other grid can be backwashed at the same time.

[0030] It should be noted that the above specific implementations are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art should understand that various modifications, equivalent substitutions, changes, etc. can be made to the present invention. However, as long as these changes do not deviate from the spirit of the present invention, they should be within the scope of protection of the present invention. In addition, some terms used in the specification and claims of this application are not restrictive, but are only for the convenience of description.

Claims

1. An integrated denitrification and denitrification filter tank, comprising a housing (1), characterized in that: A denitrification deep bed filter is provided at the middle end of the shell (1), a filter brick is provided at the bottom end of the denitrification deep bed filter, a support layer (2) and a filter material layer (3) are provided above the filter brick, and the support layer (2) is located between the filter brick and the filter material layer (3), a backwashing tank (4) and a mixing tank (5) are provided on the left and right sides of the denitrification deep bed filter, respectively, and a backwashing device (6) and a blower (7) are provided on the other side of the backwashing tank (4), a backwashing wastewater tank (8) is provided at the other end of the backwashing device (6), and the backwashing tank (4), the backwashing wastewater tank (8) and the backwashing device (6) are connected via a water pipe (9); The filter brick is composed of a water supply chamber (11) and an air supply chamber (10), wherein water outlets (12) are provided on both sides of the water supply chamber (11), and an air outlet (13) is provided at the top of the air supply chamber (10), and the air outlet (13) and the water outlet (12) are both provided with filter screens (14), and the filter screen (14) is fixedly connected to the air outlet (13) and the water outlet (12); One end of the water delivery chamber (11) is communicated with the bottom end of the mixing tank (5), a support block (15) is provided in the middle of the water delivery chamber (11), and the support block (15) is fixedly connected to the water delivery chamber (11); The denitrification deep bed filter tank on one side of the backwash tank (4) is provided with a gate (18), and the height of the gate (18) is higher than the filter material layer (3).

2. The integrated denitrification and denitrification filter tank according to claim 1, characterized in that: The air delivery chamber (10) and the blower (7) are connected via an air pipe (16), and the air pipe (16) is in a "J" shape. The height of the air pipe (16) is not lower than the housing (1).

3. The integrated denitrification and denitrification filter tank according to claim 1, characterized in that: A frame (17) is provided on the outside of the filter brick, and the frame (17) is fixedly mounted on the outside of the filter brick. At least two frames (17) are provided, and the frames (17) are arranged in an array along the filter brick.

Images