Denitrification filtering device

Abstract

The invention discloses a denitrification filtering device, and belongs to the technical field of sewage treatment devices, the denitrification filtering device comprises a denitrification filtering tank, a clear water tank and a sewage storage tank, the denitrification filtering tank is communicated with the clear water tank through a water outlet pipe, and a water inlet pipe is arranged at the position, close to the bottom end, of the outer side of the denitrification filtering tank in a communicated mode; a light filler area is arranged in the denitrification filtering tank, and a plurality of layers of filter screens are arranged above the light filler area; the device can realize an efficient denitrification effect under lower energy consumption, reduces the treatment cost, is small in occupied area, is suitable for various site conditions, can be conveniently mounted and used no matter a large sewage treatment plant or a small community sewage treatment facility, is simple to operate, is high in automation degree, and is suitable for large-scale sewage treatment plants and small-scale community sewage treatment facilities. The complexity and workload of manual operation are reduced, and the sewage treatment efficiency and stability are improved.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment equipment technology, and in particular to a denitrification filtration device. Background Technology

[0002] Nitrogen removal is a crucial task in the many stages of wastewater treatment. Excessive nitrogen discharge into water bodies causes serious environmental problems such as eutrophication and groundwater pollution. Eutrophication leads to excessive algal growth, consuming oxygen in the water and causing oxygen depletion, which in turn affects the survival of aquatic organisms. Denitrification filtration devices play a key role in the nitrogen removal process of wastewater treatment.

[0003] Denitrification filtration systems are highly efficient wastewater treatment equipment that utilizes the denitrification process of microorganisms to convert nitrate nitrogen in wastewater into nitrogen gas, thereby removing nitrogen. Compared to traditional wastewater treatment methods, denitrification filtration systems offer numerous advantages. They achieve high-efficiency nitrogen removal with lower energy consumption, reducing treatment costs. Denitrification filtration systems have a small footprint and are suitable for various site conditions, making them easy to install and use in both large wastewater treatment plants and small community wastewater treatment facilities.

[0004] Therefore, it is necessary to provide a device that combines denitrification and filtration to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a denitrification filtration device to solve the problems of high investment, high operating costs, and insufficient filtration accuracy of existing denitrification devices mentioned in the background art.

[0006] Based on the above ideas, the present invention provides the following technical solution: a denitrification filtration device, comprising a denitrification filter tank, a clear water tank, and a sludge storage tank. The denitrification filter tank is connected to the clear water tank via an outlet pipe. An inlet pipe is connected to the outside of the denitrification filter tank near the bottom. A lightweight packing zone is provided inside the denitrification filter tank. Multiple layers of filter screens are provided above the lightweight packing zone. The lightweight packing material in the lightweight packing zone is a porous material mainly composed of biodegradable polymer materials and elemental sulfur. As a further aspect of the present invention: a guide plate is provided inside the denitrification filter tank and near the top. A guide pipe is fixedly provided on the top surface of the guide plate. The guide pipe is connected to the guide plate and passes upward through the denitrification filter tank and rotates with the denitrification filter tank. The end of the return pipe near the denitrification filter tank rotates with the guide pipe, and the return pipe is connected to the guide pipe.

[0007] As a further aspect of the present invention: a plurality of nozzles are provided at the bottom end of the guide pipe, and the nozzles are connected to the guide plate by a flexible tube.

[0008] As a further aspect of the present invention: an L-shaped support rod is fixedly installed on the outer wall of the nozzle, and the top end of the support rod passes through the guide plate and forms a ball joint structure with the guide plate.

[0009] As a further aspect of the present invention: a motor is installed at the top of the denitrification filter tank, and the output shaft of the motor is driven by a belt and a guide pipe.

[0010] As a further aspect of the present invention, the lightweight filler can be cut into cubic or rhomboid blocks.

[0011] As a further aspect of the present invention, the lightweight filler also includes sodium alginate, bentonite and diatomaceous earth, wherein the proportion of elemental sulfur is 50% to 80% and the proportion of biodegradable polymer materials is 10% to 35%.

[0012] As a further aspect of the present invention: the lightweight filler is formed by foaming, and the foaming method includes physical stirring, chemical foaming agents, and supercritical foaming, etc., and the bulk density after foaming is 0.1-1.0 kg / m³. 3 .

[0013] As a further aspect of the present invention: the lightweight packing material can be suspended in the denitrification filter tank or fixed in the denitrification filter tank to provide carbon source and electron donor for autotrophic denitrifying bacteria and heterotrophic denitrifying bacteria.

[0014] Compared with the prior art, the beneficial effects of the present invention are: the device can achieve efficient denitrification with low energy consumption, reducing treatment costs; the denitrification filtration device has a small footprint and is suitable for various site conditions. It can be easily installed and used in both large-scale sewage treatment plants and small community sewage treatment facilities. Its operation is simple and highly automated, reducing the complexity and workload of manual operation and improving the efficiency and stability of sewage treatment. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the reverse-invented nitration filtration device and lightweight foam packing. Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3 This is a cross-sectional view of the present invention; Figure 4 This is a schematic diagram of the internal structure of the denitrification filter tank of the present invention; Figure 5This is a nozzle distribution diagram of the present invention; Figure 6 This is the present invention. Figure 5 A magnified structural diagram at point A; Figure 7 This is a schematic diagram illustrating the cooperation between the pressure block, the long rod, and the short rod of the present invention.

[0017] In the diagram: 1. Clear water tank; 2. Return pipe; 3. Outlet pipe; 4. Denitrification filter tank; 5. Inlet pipe; 6. Sewage pipe; 7. Connecting pipe; 8. Pulse blower; 9. Sludge storage tank; 10. Belt; 11. Guide pipe; 12. Guide plate; 13. Nozzle; 14. Filter screen; 15. Grid plate; 16. Lightweight packing area; 17. Press block; 1701. Extrusion surface; 18. Limiting plate; 19. Slide plate; 1901. Clearance groove; 20. Short rod; 21. Long rod; 22. Support rod; 23. Hose. Detailed Implementation

[0018] This invention designs a denitrification filtration device and a lightweight foam packing material, aiming to improve its denitrification efficiency and stability by optimizing the device's design and operating parameters, and to provide a more efficient and reliable denitrification solution for the wastewater treatment industry.

[0019] Reference Figure 1 As shown, it includes a denitrification filter tank, a clean water tank, and a waste liquid / sludge storage tank.

[0020] The denitrification filter tank has the functions of denitrification and suspended solids filtration, and the upper part of the tank can be sealed; the denitrification zone is filled with light foam packing, the fixed bed zone is composed of filter layers with different filter diameters, and the polymer filter layers are fixed by grid plates at the top and bottom of the fixed bed zone.

[0021] When the system is running, open electric valves 1 and 2, and wastewater enters from the bottom inlet of the denitrification filter tank and exits to the clear water tank at the top.

[0022] When the denitrification filter tank is severely clogged, backwashing is required. During backwashing, close electric valves 1 and 2 and open electric valve 3; turn on the pulse blower and water pump in sequence to achieve air flushing and water flushing, and the wastewater at the bottom flows into the waste liquid / sludge storage tank under pressure.

[0023] Before each backwash, the electric valve should be opened first. Figure 1 The electric valve 4 in the middle drains the bottom sludge.

[0024] The denitrification filter tanks can be composed of 1-100 sets. The tanks can operate independently or be combined and placed in a cement tank.

[0025] The lightweight packing material forms a porous structure through foaming. By self-assembling and adjusting the structure, the pore size of the lightweight porous material can be adjusted, and the release and degradation rates can proceed synergistically. The packing material can be suspended in the reactor or fixed in a specific area of ​​the reactor, providing carbon and electron donors for autotrophic and heterotrophic denitrifying bacteria.

[0026] The foam filler can be cut into cubic or rhomboid blocks, or into long strips.

[0027] The advantages of this invention lie in achieving high-efficiency nitrogen removal with low energy consumption, thereby reducing treatment costs. The denitrification filtration device has a small footprint and is suitable for various site conditions, whether it's a large-scale wastewater treatment plant or a small community wastewater treatment facility, allowing for convenient installation and use. Its simple operation and high degree of automation reduce the complexity and workload of manual operation, improving the efficiency and stability of wastewater treatment.

[0028] The lightweight packing material forms a porous structure through foaming. By self-assembling and adjusting the structure, the pore size of the lightweight porous material can be adjusted, and the release and degradation rates can proceed synergistically. The packing material can be suspended in the reactor or fixed in a specific area of ​​the reactor, providing carbon and electron donors for autotrophic and heterotrophic denitrifying bacteria.

[0029] The foam filler can be cut into cubic or rhomboid blocks, or into long strips.

[0030] like Figure 2 - Figure 7 As shown, a denitrification filtration device includes a denitrification filter tank 4, a clean water tank 1, and a sludge storage tank 9. Specifically, the denitrification filter tank 4 is connected to the clean water tank 1 via an outlet pipe 3. Figure 1 As shown, an inlet pipe 5 is connected to the outside of the denitrification filter tank 4 and near the bottom. Combination Figure 1 - Figure 2 As shown, the denitrification filter tank 4 has the functions of denitrification and suspended solids filtration, and the upper part of the tank body can be sealed. Specifically, a light packing zone 16 is provided inside the denitrification filter tank 4, and a multi-layer filter screen 14 is provided above the light packing zone 16. A grid plate 15 is provided above and below the filter screen 14, and the grid plate 15 is fixedly connected to the denitrification filter tank 4.

[0031] In actual use, a first electric valve is installed on the outlet pipe 3, and a second electric valve is installed on the inlet pipe 5. When the system is running, the first electric valve and the second electric valve are opened, and the sewage enters from the bottom of the denitrification filter tank 4. After passing through the light packing zone 16 and the filter screen 14, it flows to the outlet pipe 3 and is finally introduced into the clear water tank 1 through the outlet pipe 3.

[0032] The denitrification filter tank 4 is connected to the sludge storage tank 9 via a connecting pipe 7. A third electric valve is installed on the connecting pipe 7. A pulse blower 8 is installed on the top of the denitrification filter tank 4, and the output end of the pulse blower 8 is connected to the denitrification filter tank 4. A return pipe 2 is provided between the denitrification filter tank 4 and the clear water tank 1. A water pump is installed at one end of the return pipe 2 that is inserted into the clear water tank 1. When the denitrification filter tank 4 is severely clogged, it needs to be backwashed. During backwashing, the first and second electric valves are closed, the third electric valve is opened, and the pulse blower 8 and the water pump are turned on in sequence to achieve air flushing and water flushing, so that the wastewater at the bottom of the denitrification filter tank 4 flows into the sludge storage tank 9 under pressure.

[0033] A drain pipe 6 is connected to the outside of the sludge storage tank 9 and near the bottom. A fourth electric valve is installed on the drain pipe 6. In actual use, opening the fourth electric valve can discharge the sludge at the bottom of the sludge storage tank 9.

[0034] The lightweight filler in the lightweight filler zone 16 is a porous material mainly composed of biodegradable polymer materials and elemental sulfur. Other components include sodium alginate, bentonite, and diatomaceous earth. The proportion of elemental sulfur is 50% to 80%, the proportion of biodegradable polymer materials is 10% to 35%, and the proportion of other components is 5% to 10%.

[0035] Lightweight fillers are formed through foaming, with foaming methods including physical stirring, chemical foaming agents, and supercritical foaming. The bulk density after foaming is 0.1–1.0 kg / m³. 3 .

[0036] Lightweight packing material can be suspended in the denitrification filter tank 4 or fixed in a certain area of ​​the denitrification filter tank 4 to provide carbon source and electron donor for autotrophic denitrifying bacteria and heterotrophic denitrifying bacteria.

[0037] This solution achieves high-efficiency denitrification with low energy consumption, reducing treatment costs. The denitrification filtration device has a small footprint and is suitable for various site conditions. It can be easily installed and used in both large-scale wastewater treatment plants and small community wastewater treatment facilities. Its operation is simple and highly automated, reducing the complexity and workload of manual operation and improving the efficiency and stability of wastewater treatment.

[0038] This solution organically combines denitrification and filtration. Denitrification requires no carbon source, has low backwashing intensity, and high filtration accuracy. It is suitable for various site conditions, from large-scale wastewater treatment plants to small community wastewater treatment facilities, and can be easily installed and used. Its operation is simple, highly automated, and reduces the complexity and workload of manual operation, thereby improving the efficiency and stability of wastewater treatment.

[0039] Inside the denitrification filter tank 4, near the top, a guide plate 12 is provided. A guide pipe 11 is fixedly provided on the top surface of the guide plate 12. The guide pipe 11 is connected to the guide plate 12 and passes upward through the denitrification filter tank 4 and is rotatably engaged with it through a sealed bearing. The end of the return pipe 2 near the denitrification filter tank 4 is rotatably engaged with the guide pipe 11 through a sealed bearing, and the return pipe 2 is connected to the guide pipe 11. In order to drive the guide pipe 11 to rotate, a motor is installed at the top of the denitrification filter tank 4. The output shaft of the motor is driven by the guide pipe 11 through a belt 10, thereby driving the guide plate 12 to rotate.

[0040] The bottom end of the guide pipe 11 is provided with multiple nozzles 13. The nozzles 13 are connected to the guide plate 12 through a flexible hose 23. This structure allows the nozzles 13 to change their angle relative to the guide plate 12, thereby enabling all-round cleaning of the filter screen 14 and the inner wall of the denitrification filter tank 4.

[0041] An L-shaped support rod 22 is fixedly installed on the outer wall of the nozzle 13. The top of the support rod 22 passes through the guide plate 12 and forms a ball joint structure with the guide plate 12, so that the support rod 22 can drive the nozzle 13 to adjust the angle. Of course, this solution has a U-shaped limiting plate 18 on the top of the guide plate 12, and a sliding plate 19 is provided between the limiting plate 18 and the guide plate 12. Multiple clearance grooves 1901 are evenly opened on the sliding plate 19. The clearance grooves 1901 are arranged opposite to the support rod 22, so that the top of the support rod 22 is located in the clearance groove 1901. Figure 4 As shown, a through hole is provided at the center of the slide plate 19 so that the guide pipe 11 can pass through the through hole and connect to the guide plate 12; A pressure block 17 is fixedly installed on the inner wall of the denitrification filter tank 4. The outer wall of the pressure block 17 is an inclined extrusion surface 1701. A short rod 20 is fixedly installed on the end face of the slide plate 19, and a long rod 21 is fixedly installed on the side of the slide plate 19. The long rod 21, the short rod 20, and the pressure block 17 are in the same horizontal plane. During the rotation of the guide plate 12 driven by the motor, the nozzle 13 can be rotated through the guide plate 12, thereby cleaning the filter screen 14 and the inner wall of the denitrification filter tank 4. When the short rod 20 passes the pressure block 17, the extrusion surface 1701 can squeeze the short rod 20, thereby promoting... The slide plate 19 moves along the length of the guide plate 12. The pressure of the support rod 22 on the inner wall of the clearance groove 1901 can drive the nozzle 13 to deflect in the left and right directions. When the long rod 21 passes the pressure block 17, the cooperation between the pressure block 17 and the long rod 21 can drive the slide plate 19 to move along the width of the guide plate 12. The pressure of the support rod 22 on the inner wall of the clearance groove 1901 can drive the nozzle 13 to deflect in the front and back directions. In summary, this structure can adjust the angle of the nozzle 13 in all directions, thereby better cleaning the filter screen 14 and the inner wall of the denitrification filter tank 4.

Claims

1. A denitrification filtration device, comprising a denitrification filter tank (4), a clean water tank (1), and a sludge storage tank (9), wherein the denitrification filter tank (4) is connected to the clean water tank (1) via an outlet pipe (3), and an inlet pipe (5) is provided on the outer side of the denitrification filter tank (4) near its bottom, characterized in that: The denitrification filter tank (4) is provided with a light packing zone (16), and a multi-layer filter screen (14) is provided above the light packing zone (16). The light packing in the light packing zone (16) is a porous material mainly composed of biodegradable polymer materials and elemental sulfur. The denitrification device can be operated as a single unit or in parallel. When operating in parallel, the denitrification devices are backwashed one by one, which can achieve continuous water intake and continuous water output. The lightweight filler also includes sodium alginate, bentonite, and diatomaceous earth, wherein the proportion of elemental sulfur is 50%–80%, and the proportion of biodegradable polymer materials is 10%–35%. The lightweight filler is formed by foaming, and the foaming methods include physical stirring, chemical foaming agents, and supercritical foaming. The bulk density after foaming is 0.1 to 1.0 kg / m³. 3 .

2. The denitrification filtration device according to claim 1, characterized in that: Inside the denitrification filter tank (4) and near the top, there is a guide plate (12). A guide pipe (11) is fixedly installed on the top surface of the guide plate (12). The guide pipe (11) is connected to the guide plate (12). The guide pipe (11) passes upward through the denitrification filter tank (4) and rotates with the denitrification filter tank (4). The end of the return pipe (2) near the denitrification filter tank (4) rotates with the guide pipe (11), and the return pipe (2) is connected to the guide pipe (11).

3. The denitrification filtration device according to claim 2, characterized in that: The bottom end of the guide pipe (11) is provided with a plurality of nozzles (13), and the nozzles (13) are connected to the guide plate (12) by a hose (23).

4. A denitrification filtration device according to claim 3, characterized in that: An L-shaped support rod (22) is fixedly installed on the outer wall of the nozzle (13). The top end of the support rod (22) passes through the guide plate (12) and forms a ball joint structure with the guide plate (12).

5. A denitrification filtration device according to claim 2, characterized in that: The denitrification filter tank (4) is equipped with a motor at the top, and the output shaft of the motor is driven by the guide pipe (11) through the belt (10).

6. The denitrification filtration device according to claim 1, characterized in that: The lightweight filler can be cut into cubic or rhomboid blocks.

7. A denitrification filtration device according to claim 1, characterized in that: Lightweight packing material can be suspended in the denitrification filter tank (4) or fixed in the denitrification filter tank (4) to provide carbon source and electron donor for autotrophic denitrifying bacteria and heterotrophic denitrifying bacteria.

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