Anaerobic biofilter filtration device

Abstract

The utility model discloses an anaerobic biofilter filter device relates to sewage treatment equipment technical field, including pool body and layered filter material subassembly, the left side top of pool body is passed through and is provided with inlet pipe, and the right -hand member of inlet pipe is connected with main water distribution pipe, the inside of main water distribution pipe is connected with branch water distribution pipe, and the bottom of branch water distribution pipe is installed with umbrella -shaped water distribution head, the lower left side of pool body is passed through and is provided with drain pipe, and the bottom middle end of pool body is passed through and is provided with blowoff pipe. This anaerobic biofilter filter device, open the valve on inlet pipe, make the wastewater to be handled flow into main water distribution pipe through inlet pipe, then shunt to branch water distribution pipe from main water distribution pipe, spread to the filter material cylinder surface in the pool body through the umbrella -shaped water distribution head of branch water distribution pipe bottom with the umbrella -shaped diffusion form of wastewater, effectively promote water distribution evenness, avoid the problem that the biological membrane is scoured in the area of too fast flow rate, the silt problem of the area of too slow flow rate, reduce the biomass loss rate.

Description

Technical Field

[0001] This utility model relates to the technical field of sewage treatment equipment, specifically to an anaerobic biological filter device. Background Technology

[0002] Anaerobic biological filters are a core technology for treating high-concentration organic wastewater (such as livestock and poultry breeding wastewater, food processing wastewater, and brewing wastewater). Their core function relies on filtration devices. Anaerobic microorganisms are immobilized on filter media, and their metabolism degrades pollutants such as COD and BOD in the wastewater. Simultaneously, suspended solids (SS) are removed through the physical retention of the filter media. Filtration devices can maintain a stable COD removal rate of 80%–90% and an SS removal rate of 60%–75% in anaerobic biological filters, which is crucial for ensuring effective wastewater purification and stable operation of subsequent processes.

[0003] For example, utility model application CN201920740902.7 discloses an anaerobic biological filter that is easy to clean. This utility model achieves the effect of uniformly cleaning the filter media and filtering wastewater by setting up a filter media body, water pipes, nozzles, and a motor, thus improving the wastewater treatment efficiency of the equipment. However, the filter media is made of volcanic rock or ceramsite with a single particle size, resulting in low porosity, easy clogging, and low microbial adhesion.

[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and proposed an anaerobic biological filter device. Utility Model Content

[0005] The purpose of this invention is to provide an anaerobic biological filter device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an anaerobic biological filter device, comprising a tank body and a layered filter media assembly. An inlet pipe is installed through the upper left side of the tank body, and a main water distribution pipe is connected to the right end of the inlet pipe. A branch water distribution pipe is connected to the inner side of the main water distribution pipe, and an umbrella-shaped water distribution head is installed at the bottom of the branch water distribution pipe. A drain pipe is installed through the lower right side of the tank body, and a sewage discharge pipe is installed through the middle of the bottom of the tank body. Valves are installed on the inlet pipe, drain pipe, and sewage discharge pipe. The layered filter media... The component is located at the top of the pool body, and the layered filter media component includes a drive motor, a drive rod, a filter media cylinder, a first partition, a second partition, a third partition, a lower layer filter media, a middle layer filter media, and an upper layer filter media. The output end of the drive motor is connected to the drive rod, and the filter media cylinder is fixed to the lower part of the drive rod. The filter media cylinder has a first partition, a second partition, and a third partition arranged sequentially from bottom to top inside. The lower layer filter media is arranged below the first partition, the middle layer filter media is arranged below the second partition, and the upper layer filter media is arranged below the third partition.

[0007] Furthermore, the pool body is fixed with four legs at the bottom corners, and a support plate is provided on the lower left side of the pool body.

[0008] Furthermore, a water pump is installed on the top of the support plate, and the output end of the water pump is connected to a water outlet pipe, with a nozzle installed on the outside of the water outlet pipe.

[0009] Furthermore, the inlet pipe, main water distribution pipe, and branch water distribution pipe are interconnected, and the umbrella-shaped water distribution heads are equidistantly distributed along the length of the branch water distribution pipe.

[0010] Furthermore, the filter media cylinder, the first partition, the second partition, and the third partition are all provided with water-permeable holes, and the hole diameters of the filter media cylinder and the first partition are the same, while the hole diameters of the first partition, the second partition, and the third partition increase sequentially.

[0011] Furthermore, the pore size of the first partition is smaller than the particle size of the middle layer filter material, and the pore size of the second partition is smaller than the particle size of the upper layer filter material.

[0012] Furthermore, the pore size of the filter media cylinder and the first partition plate is smaller than the particle size of the lower filter media, and the particle size of the lower filter media, the middle filter media and the upper filter media increases sequentially.

[0013] This utility model provides an anaerobic biological filter device, which has the following beneficial effects:

[0014] 1. The filter media cylinder of this utility model is divided into three layers of filter media from top to bottom by a third partition, a second partition, and a first partition, and the particle size of the filter media increases in a stepwise manner. This achieves a stepwise interception of large particles first and small particles later, avoiding the contradiction of "fine particles clogging pores and large particles not being intercepted" in traditional single filter media. At the same time, the pore size of the third partition, the second partition, the first partition and the filter media cylinder are precisely matched with the corresponding filter media particle size, thereby preventing the mixing of filter media layers and ensuring smooth water flow, avoiding pore blockage.

[0015] 2. This utility model opens the valve on the inlet pipe, allowing the wastewater to flow into the main distribution pipe through the inlet pipe, and then is diverted from the main distribution pipe to the branch distribution pipe. The wastewater is sprayed onto the surface of the filter media cylinder in the tank in an umbrella-shaped diffusion form through the umbrella-shaped water distribution head at the bottom of the branch distribution pipe, which effectively improves the uniformity of water distribution, avoids the problem of the biofilm being washed away in areas with too fast flow and the accumulation of sludge in areas with too slow flow, and reduces the biomass loss rate. Attached Figure Description

[0016] Figure 1 This is a schematic cross-sectional view of the anaerobic biological filter tank of this utility model.

[0017] Figure 2 This is a bottom view of the main water distribution pipe of an anaerobic biological filter device according to the present invention.

[0018] Figure 3 This is a three-dimensional structural diagram of the filter media cylinder and the third partition of an anaerobic biological filter device according to this utility model.

[0019] In the diagram: 1. Pool body; 2. Support legs; 3. Support plate; 4. Water pump; 5. Outlet pipe; 6. Sprayer head; 7. Inlet pipe; 8. Main water distribution pipe; 9. Branch water distribution pipe; 10. Umbrella-shaped water distribution head; 11. Drain pipe; 12. Sewage pipe; 13. Valve; 14. Layered filter media assembly; 1401. Drive motor; 1402. Drive rod; 1403. Filter media cylinder; 1404. First partition; 1405. Second partition; 1406. Third partition; 1407. Lower filter media; 1408. Middle filter media; 1409. Upper filter media. Detailed Implementation

[0020] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0021] like Figure 1 and Figure 3As shown, an anaerobic biological filter device includes a tank body 1 and a layered filter media assembly 14. The layered filter media assembly 14 is disposed on the top of the tank body 1 and includes a drive motor 1401, a drive rod 1402, a filter media cylinder 1403, a first partition 1404, a second partition 1405, a third partition 1406, a lower layer filter media 1407, a middle layer filter media 1408, and an upper layer filter media 1409. The output end of the drive motor 1401 is connected to the drive rod 1402, and the filter media cylinder 1403 is fixed to the lower part of the drive rod 1402. The filter media cylinder 1403 has the first partition 1404, the second partition 1405, and the third partition 1406 arranged sequentially from bottom to top inside. The lower layer filter media 1407 is arranged below the first partition 1404, and the second partition 1406 is arranged below the third partition 1406. A middle layer filter media 1408 is disposed below the third partition 1406, and an upper layer filter media 1409 is disposed below the third partition 1406. Water permeable holes are provided on the filter media cylinder 1403, the first partition 1404, the second partition 1405, and the third partition 1406. The pore diameters of the filter media cylinder 1403 and the first partition 1404 are the same, and the pore diameters of the first partition 1404, the second partition 1405, and the third partition 1406 increase sequentially. The pore diameter of the first partition 1404 is smaller than the particle size of the middle layer filter media 1408, the pore diameter of the second partition 1405 is smaller than the particle size of the upper layer filter media 1409, and the pore diameters of the filter media cylinder 1403 and the first partition 1404 are smaller than the particle size of the lower layer filter media 1407. The particle sizes of the lower layer filter media 1407, the middle layer filter media 1408, and the upper layer filter media 1409 increase sequentially.

[0022] The specific operation is as follows: the filter media cylinder 1403 is divided into three layers of filter media from top to bottom by the third partition 1406, the second partition 1405, and the first partition 1404, and the particle size of the filter media increases in a stepwise manner. This achieves a stepwise interception of large particles first and small particles later, avoiding the contradiction of "fine particles clogging pores and large particles not being intercepted" in traditional single filter media. At the same time, the pore size of the third partition 1406, the second partition 1405, the first partition 1404 and the filter media cylinder 1403 is precisely matched with the corresponding filter media particle size, thereby preventing the mixing of filter media layers and ensuring smooth water flow, avoiding pore blockage.

[0023] like Figure 1 and Figure 2As shown, an inlet pipe 7 is installed through the upper left side of the pool body 1, and the right end of the inlet pipe 7 is connected to a main water distribution pipe 8. The inner side of the main water distribution pipe 8 is connected to a branch water distribution pipe 9, and the bottom of the branch water distribution pipe 9 is equipped with an umbrella-shaped water distribution head 10. A drain pipe 11 is installed through the lower right side of the pool body 1, and a sewage pipe 12 is installed through the middle of the bottom of the pool body 1. Valves 13 are installed on the inlet pipe 7, the drain pipe 11, and the sewage pipe 12. Support legs 2 are fixed at the four corners of the bottom of the pool body 1, and a support plate 3 is installed on the lower left side of the pool body 1. A water pump 4 is installed on the top of the support plate 3, and the output end of the water pump 4 is connected to an outlet pipe 5. A nozzle 6 is installed on the outside of the outlet pipe 5. The inlet pipe 7, the main water distribution pipe 8, and the branch water distribution pipe 9 are interconnected, and the umbrella-shaped water distribution heads 10 are equidistantly distributed along the length of the branch water distribution pipe 9.

[0024] The specific operation is as follows: open valve 13 on inlet pipe 7 to allow the wastewater to flow into main distribution pipe 8 through inlet pipe 7, and then be diverted from main distribution pipe 8 to branch distribution pipe 9. Through umbrella-shaped water distribution head 10 at the bottom of branch distribution pipe 9, the wastewater is sprayed onto the surface of filter media 1403 in tank 1 in an umbrella-shaped diffusion form, which effectively improves the uniformity of water distribution, avoids the problem of scouring the biofilm in areas with too fast flow rate and accumulating sludge in areas with too slow flow rate, and reduces the biomass loss rate.

[0025] In summary, when using this anaerobic biological filter device, the high-concentration organic wastewater to be treated first enters the main water distribution pipe 8 through the inlet pipe 7, and is then distributed by the main water distribution pipe 8 to four branch water distribution pipes 9. The wastewater is then evenly sprayed onto the top of the filter media cylinder 1403 through the umbrella-shaped water distribution head 10. After the wastewater permeates into the interior along the top of the filter media cylinder 1403, it flows sequentially through the three layers of filter media area separated by the third partition 1406, the second partition 1405, and the first partition 1404.

[0026] The lightweight porous ceramsite filled in the upper filter media 1409 first traps larger suspended solids, preventing large particles from entering the lower fine filter media and causing blockage. At the same time, a small number of acid-producing bacteria initially attach to the surface of the ceramsite, which can pre-treat some easily degradable organic matter. Then, the wastewater permeates into the middle filter media 1408 filled with modified polyurethane filler. The porous structure of the modified polyurethane filler forms a closed anaerobic microenvironment. The acid-producing bacteria enriched on its surface can efficiently degrade medium-molecular-weight organic matter in the wastewater, converting it into small-molecular-weight organic acids, significantly reducing the COD load of the wastewater. Finally, the wastewater enters the lower filter media 1407 filled with quartz sand. The quartz sand traps fine suspended solids in the wastewater with its dense pores, achieving deep trapping. Moreover, the high specific surface area of ​​the quartz sand provides a stable attachment carrier for methanogens and acid-producing bacteria. The acid-producing bacteria further decompose the remaining medium-molecular-weight organic matter into small-molecular-weight organic acids, while the methanogens convert the organic acids into methane, ultimately resulting in a significant reduction in the COD concentration of the wastewater.

[0027] During this process, the drive motor 1401 drives the drive rod 1402 and the filter media cylinder 1403 to rotate at low speed, so that each layer of filter media in the filter media cylinder 1403 can fully contact the wastewater. At the same time, the slight disturbance of the water flow between the filter media can prevent fine suspended matter from being excessively deposited on the surface of the filter media and delay clogging. After the wastewater is filtered in layers and degraded by microorganisms, it permeates to the bottom of the tank 1 through the water permeable holes on the third partition 1406, the second partition 1405, the first partition 1404 and the filter media cylinder 1403, and is finally discharged through the drain pipe 11.

[0028] When the filter media in the filter cylinder 1403 becomes slightly clogged after the device has been running for a period of time, the water pump 4 is started and high-pressure water is sprayed onto the outer wall of the filter cylinder 1403 through the nozzle 6 on the water outlet pipe 5. This, combined with the low-speed rotation of the filter cylinder 1403, achieves uniform rinsing. The sludge-containing wastewater generated during rinsing flows downward along the inner wall of the filter cylinder 1403, collects at the bottom of the tank 1, and is finally discharged through the drain pipe 12 with the valve 13 opened.

[0029] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. An anaerobic biological filter device, comprising a tank body (1) and a layered filter media assembly (14), characterized in that, A water inlet pipe (7) is installed through the upper left side of the pool body (1), and a main water distribution pipe (8) is connected to the right end of the water inlet pipe (7). A branch water distribution pipe (9) is connected to the inner side of the main water distribution pipe (8), and an umbrella-shaped water distribution head (10) is installed at the bottom of the branch water distribution pipe (9). A drain pipe (11) is installed through the lower right side of the pool body (1), and a sewage pipe (12) is installed through the middle of the bottom of the pool body (1). Valves (13) are installed on the water inlet pipe (7), the drain pipe (11), and the sewage pipe (12). The layered filter media assembly (14) is located at the top of the pool body (1), and the layered filter media assembly (14) includes a drive motor (1401), a drive rod (1402), a filter media cylinder (1403), and a first partition (1404). The filter media consists of a second partition (1405), a third partition (1406), a lower filter media (1407), a middle filter media (1408), and an upper filter media (1409). The output end of the drive motor (1401) is connected to a drive rod (1402), and a filter media cylinder (1403) is fixed to the lower part of the drive rod (1402). The filter media cylinder (1403) is arranged from bottom to top with a first partition (1404), a second partition (1405), and a third partition (1406). The lower filter media (1407) is arranged below the first partition (1404), the middle filter media (1408) is arranged below the second partition (1405), and the upper filter media (1409) is arranged below the third partition (1406).

2. The anaerobic biological filter device according to claim 1, characterized in that, The bottom four corners of the pool body (1) are fixed with support legs (2), and a support plate (3) is provided on the lower left side of the pool body (1).

3. The anaerobic biological filter device according to claim 2, characterized in that, A water pump (4) is installed on the top of the support plate (3), and the output end of the water pump (4) is connected to a water outlet pipe (5). A nozzle (6) is installed on the outside of the water outlet pipe (5).

4. The anaerobic biological filter device according to claim 1, characterized in that, The inlet pipe (7), the main water distribution pipe (8), and the branch water distribution pipe (9) are interconnected, and the umbrella-shaped water distribution heads (10) are equidistantly distributed along the length of the branch water distribution pipe (9).

5. The anaerobic biological filter device according to claim 1, characterized in that, The filter media cylinder (1403), the first partition (1404), the second partition (1405) and the third partition (1406) are all provided with water-permeable holes, and the filter media cylinder (1403) and the first partition (1404) have the same hole diameter, while the hole diameters of the first partition (1404), the second partition (1405) and the third partition (1406) increase sequentially.

6. The anaerobic biological filter device according to claim 1, characterized in that, The pore size of the first partition (1404) is smaller than the particle size of the middle layer filter media (1408), and the pore size of the second partition (1405) is smaller than the particle size of the upper layer filter media (1409).

7. The anaerobic biological filter device according to claim 1, characterized in that, The pore size of the filter media cylinder (1403) and the first partition plate (1404) is smaller than the particle size of the lower filter media (1407), and the particle size of the lower filter media (1407), the middle filter media (1408) and the upper filter media (1409) increases sequentially.

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