Integrated rural sewage treatment device

Abstract

The utility model provides an integrated rural sewage treatment device which comprises a biological filtration tower body, a water inlet pipe is arranged at the top of the biological filtration tower body, the tower body is of a split structure, a precipitation tank is arranged on the lowermost layer, at least two biological filtration tanks are sequentially stacked above the precipitation tank from bottom to top in a stacking mode, and the bottom of the biological filtration tank is provided with a water inlet pipe. A funnel-shaped drainage piece is arranged at the bottom of the biofilter at the lowest layer, the neck of the drainage piece extends to the bottom of the precipitation tank, and effluent of the biofilter at the lowest layer enters from the top end of the drainage piece and is drained to the bottom of the precipitation tank through the neck of the drainage piece; the multiple layers of biological filters are stacked in different areas and can be independently detached and replaced, the biological filters are more convenient to clean, the precipitation tank is arranged at the bottom of the filter tower, and effluent in the lowest layer of biological filter is drained to the bottom of the precipitation tank through the drainage piece, so that SS in sewage is removed, the precipitation tank and the filter tower are integrated, and the sewage treatment efficiency is improved. The occupied area of equipment can be saved; the inlet water and the outlet water can reach the first-level standard of the DB50 / 848-2021 table 2.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage recycling and treatment, and particularly relates to an integrated rural sewage treatment device. Background Art

[0002] The biochemical property of rural sewage is poor; at the same time, in the north, affected by seasonal changes, the microbial activity is greatly reduced in winter; in addition, affected by seasons and different time periods, the water volume and water quality change greatly. Therefore, even if some villages have carried out sewage treatment, it is only simple pre-sedimentation treatment, and it is difficult to reduce the nitrogen and phosphorus content in the sewage.

[0003] Secondly, due to the characteristics of small quantity and non-concentration of rural domestic sewage, the treatment cost must be considered during treatment. Building large sewage treatment plants is not suitable for the treatment of rural domestic sewage. Instead, small integrated equipment with low treatment cost is highly favored in the rural domestic sewage market.

[0004] The existing biological filter tower is of an integral structure, and multiple layers of fillers are arranged from top to bottom in sequence for biological filtration. After long-term use of the biological filter tower, a large amount of sundries will accumulate on the fillers, affecting the filtration effect. The existing biological filter tower has the problem of inconvenient cleaning. Content of the Utility Model

[0005] The utility model aims to provide an integrated rural sewage treatment device, which saves land, has low construction cost, low treatment energy consumption and is convenient to clean.

[0006] For this purpose, the technical solution adopted by the utility model is: an integrated rural sewage treatment device, including a biological filter tower body, wherein a water inlet pipe is arranged at the top of the biological filter tower body, and the characteristics are that: the tower body is of a split structure, the lowermost layer is a sedimentation tank, and at least two biological filter pools are stacked from bottom to top in sequence above the sedimentation tank in a stacked manner. A funnel-shaped drainage member is arranged at the bottom of the lowermost biological filter pool, the neck of the drainage member extends to the middle and lower part of the sedimentation tank, and the water outlet of the lowermost biological filter pool enters from the top end of the drainage member and is drained to the middle and lower part of the sedimentation tank through the neck of the drainage member.

[0007] Preferably, as the above scheme, a water distributor is arranged at the top of the biological filter tower body, the water distributor is connected with the water inlet pipe, and the water distributor is a rotary water distributor.

[0008] Further preferably, a water collecting weir is arranged at the upper part of the sedimentation tank, and a drain outlet is arranged on the water collecting weir.

[0009] Further preferably, three biological filter pools are stacked from bottom to top in sequence above the sedimentation tank in a stacked manner, and the particle sizes of the fillers of the three biological filter pools decrease from top to bottom in sequence.

[0010] Further preferably, the filler is one of volcanic stone, activated carbon, zeolite, and polyurethane combined filler.

[0011] Further preferably, the filler is volcanic stone. The particle size of the topmost layer of the filler is 30 - 50 mm, the particle size of the middle layer of the filler is 20 - 30 mm, and the particle size of the bottommost layer of the filler is 10 - 20 mm.

[0012] Further preferably, a submersible sewage pump is provided on the water inlet pipe.

[0013] The water outlet end of the water inlet pipe is arranged at the top of the biological filter tower body, and water is distributed through a water distributor, so as to make the water distribution uniform, avoid the blockage of the water distribution holes, and the sewage enters the multi-layer filter layer below the water distributor for filtration, which can reduce the nitrogen and phosphorus content in rural sewage and reduce the pollution of rural sewage. A water collection weir is arranged below the filter layer to discharge the filtered sewage from the side. The sludge in the sewage finally settles at the bottom of the biological filter tower body through a sedimentation tank and is discharged from the bottom sludge discharge pipe of the sedimentation tank.

[0014] The beneficial effects of the present utility model: By setting a biological filter tower with a split structure, multiple biological filter pools are stacked and placed in partitions, and can be disassembled and replaced separately, which is more convenient when cleaning the biological filter pools. The sedimentation tank is arranged at the bottom of the filter tower, and the water outlet in the bottommost biological filter pool is drained to the bottom of the sedimentation tank through a drainage member, so as to remove the SS in the sewage. The sedimentation tank and the filter tower are integrated, which can save the equipment footprint; the influent and effluent water of this device can reach the first-level standard in Table 2 of DB50 / 848 - 2021. Description of the Drawings

[0015] Figure 1 is the structural schematic diagram of the present utility model.

[0016] Figure 2 is the top view of the rotary water distributor in the present utility model. Detailed Embodiments

[0017] The following further describes the present utility model in conjunction with the drawings and embodiments.

[0018] As Figure 1-2 shown, an integrated rural sewage treatment device includes a biological filter tower body 1. A water inlet pipe 2 is arranged at the top of the biological filter tower 1. A water distributor 3 connected to the water inlet pipe 2 is arranged at the top of the biological filter tower body 1. Preferably, the water distributor 3 is a rotary water distributor 3. A submersible sewage pump (not shown in the figure) is arranged on the water inlet pipe 2. The sewage lifted by the submersible sewage pump is then evenly dripped into the lower biological filter layer for treatment by the rotary water distributor 3. The water distributor 3 automatically rotates by using the kinetic energy of the sewage to make the water distribution uniform and avoid the blockage of the water distribution holes at the same time.

[0019] The tower body 1 is of a split structure. The lowermost layer is the sedimentation tank 4. Above the sedimentation tank 4, a plurality of biological filters are stacked in sequence from bottom to top by stacking. At the bottom of the lowermost biological filter, a funnel-shaped drainage member 6 is provided. The neck of the drainage member 6 extends to the middle and lower part of the sedimentation tank 4. The water outlet of the lowermost biological filter enters from the top of the funnel and is drained to the middle and lower part of the sedimentation tank 4 through the neck of the funnel. A water collection weir 5 is provided at the upper part of the sedimentation tank 4, and a drain port is provided on the water collection weir 5. The sedimentation tank 4 is arranged at the bottom of the filter tower to remove SS in the sewage. The sedimentation tank 4 and the filter tower are integrated and placed at the bottom, saving the floor area of the equipment.

[0020] The filler 7 is one of volcanic stone, activated carbon, zeolite, and polyurethane composite filler. In this embodiment, above the sedimentation tank 4, three biological filters are stacked in sequence from bottom to top by stacking. The particle sizes of the fillers 7 of the three biological filters decrease in sequence from top to bottom. In this embodiment, the filler 7 is volcanic stone. The particle size of the uppermost layer of filler 701 is 30 - 50 mm, the particle size of the middle layer of filler 702 is 20 - 30 mm, and the particle size of the lowermost layer of filler 703 is 10 - 20 mm. The uppermost layer is volcanic stone with a particle size of 40 - 60 mm, which is used for rough filtration of sewage to avoid the blockage of filter media by the dregs brought by the sewage. At the same time, it can ensure sufficient gaps to ensure the full contact between the microorganisms in the filter media and air for aerobic decomposition of organic matter, and can also avoid the adhesion of biofilms. The middle layer is volcanic stone with a particle size of 20 - 30 mm, which serves as the main growth carrier for microorganisms. Through the growth and reproduction of microorganisms, the purpose of removing pollutants can be achieved. The lowermost layer is volcanic stone with a particle size of 10 - 20 mm. The filter media of this layer is relatively dense, which can filter out the suspended solids in the sewage, reduce the SS of the effluent, and at the same time can form a local anoxic zone to enhance the denitrification efficiency of microorganisms. The filter layers are placed separately and can be disassembled and replaced individually.

[0021] The water outlet end of the water inlet pipe 2 is arranged at the top of the biological filter tower body 1 and water is distributed through the water distributor 3, so as to make the water distribution uniform and avoid the blockage of the water distribution holes. The sewage enters the multi-layer filter layer below the water distributor 3 for filtration, which can reduce the nitrogen and phosphorus content in rural sewage and reduce the pollution of rural sewage. A water collection weir 5 is arranged below the filter layer to discharge the filtered sewage from the side. The sludge in the sewage finally settles at the bottom of the biological filter tower body 1 through the sedimentation tank 4.

[0022] The influent and effluent of this device can reach the following standards:

[0023]

[0024] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. An integrated rural sewage treatment device, including a biological filter tower body (1), and a water inlet pipe (2) is arranged at the top of the biological filter tower body (1), characterized in that: The tower body (1) is of a split structure. The lowermost layer is a sedimentation tank (4). Above the sedimentation tank (4), at least two biological filters are stacked in sequence from bottom to top by stacking. A funnel-shaped drainage member (6) is arranged at the bottom of the lowermost biological filter. The neck of the drainage member (6) extends to the middle and lower part of the sedimentation tank (4). The water outlet of the lowermost biological filter enters from the top end of the drainage member (6) and is drained to the middle and lower part of the sedimentation tank (4) through the neck of the drainage member (6).

2. An integrated rural sewage treatment device according to claim 1, characterized in that: A water distributor (3) is arranged at the top of the biological filter tower body (1). The water distributor (3) is connected to the water inlet pipe (2). The water distributor (3) is a rotary water distributor (3).

3. An integrated rural sewage treatment device according to claim 1 or 2, characterized in that: A water collecting weir (5) is arranged at the upper part of the sedimentation tank (4). A drain port is arranged on the water collecting weir (5).

4. The integrated rural sewage treatment device according to claim 3, characterized in that: Above the sedimentation tank (4), three biological filters are stacked in sequence from bottom to top by stacking. The particle sizes of the fillers (7) of the three biological filters decrease in sequence from top to bottom.

5. An integrated rural sewage treatment device according to claim 4, characterized in that: The filler (7) is one of volcanic stone, activated carbon, zeolite, and polyurethane composite filler.

6. An integrated rural sewage treatment device according to claim 5, characterized in that: The filler (7) is volcanic stone. The particle size of the uppermost layer of filler (701) is 30 - 50 mm, the particle size of the middle layer of filler (702) is 20 - 30 mm, and the particle size of the lowermost layer of filler (703) is 10 - 20 mm.

7. An integrated rural sewage treatment device according to claim 1, characterized in that: A submersible pump is arranged on the water inlet pipe (2).

Images