Ecological filter sewage treatment device

Abstract

The utility model discloses an ecological filter sewage treatment device which comprises a retaining wall and a water inlet pipe, an outer channel is arranged on the inner side of the retaining wall, a slag removal layer is arranged at the bottom of the outer channel, a large filter material is filled in the slag removal layer, an intercepting screen is installed at the top of the large filter material, a water inlet is formed in the upper portion of the intercepting screen, and a manhole is formed in the slag removal layer. A middle channel is installed on the inner side of the outer channel, an inner channel is installed on the inner side of the middle channel, a water inlet pipe is installed in the center of the inner channel, and a water outlet is formed in the top of the inner channel. The ecological filter sewage treatment device is of a detachable structure, the blockage condition is judged according to the height of the water head of the water outlet of the inner channel, and the inner channel is cleaned regularly; meanwhile, the outer canal is flushed and ventilated according to a manhole formed in the outer canal; the filter filler is easy to replace, and the phenomena of blockage and insufficient oxygen supply are reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of wastewater treatment, and particularly relates to an ecological filter sewage treatment device. Background Technique

[0002] The ecological filter is a new type of ecological sewage treatment technology developed on the basis of biological filters and constructed wetlands. It mainly purifies pollutants in sewage through the interception and adsorption of filter media, the oxidation and decomposition of microorganisms attached to the media, and the absorption and transformation of filter plants. Due to combining the advantages of biological filters and constructed wetlands, the ecological filter has obvious comparative advantages in terms of comprehensive performance such as investment cost, operation cost, purification effect, floor area, ecological benefits, and operation difficulty. Therefore, it is very promising to be popularized and applied in the treatment of sewage and wastewater such as rural domestic sewage, aquaculture wastewater, tail water of sewage treatment plants, and industrial wastewater.

[0003] However, the current ecological filter technology usually shows problems such as easy clogging of the packing bed, insufficient oxygen supply (especially in the middle and lower parts of the filter bed without plant roots), poor removal effect on nutrient pollutants, great influence of treatment effect by seasons, and inconvenient packing replacement. On the other hand, as a newly developed sewage treatment technology, the ecological filter has great potential for excavation in terms of morphological combination and parameter optimization.

[0004] At present, the invention patent of Patent CN110002580A discloses an ecological filter sewage treatment device. The present invention can overcome problems such as clogging of the packing bed, insufficient oxygen supply, and short circuit of water flow, and improves the treatment efficiency of pollutants, especially nitrogen and phosphorus substances. After being treated by the ecological filter sewage treatment device, the removal rates of ammonia nitrogen, total phosphorus, and COD in the water body can reach more than 86%, 83%, and 87% respectively. Although it can better remove ammonia nitrogen, total phosphorus, and COD in sewage, the whole filter is an integral structure, and it is not easy to replace the packing layers in the pool body, and there will also be phenomena of clogging and insufficient oxygen supply. Content of the Utility Model

[0005] The purpose of the utility model is to provide an ecological filter sewage treatment device to solve the problem that it is not easy to replace the packing layers in the integral-structured filter.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an ecological filter tank sewage treatment device, comprising a retaining wall and a water inlet pipe, characterized in that an outer channel is arranged on the inner side of the retaining wall, a slag cleaning layer is arranged at the bottom of the outer channel, large filter materials are filled inside the slag cleaning layer, an intercepting screen is installed on the top of the large filter materials, a water inlet is opened on the upper part of the intercepting screen, a manhole is provided on the slag cleaning layer, a middle channel is installed on the inner side of the outer channel, an inner channel is installed on the inner side of the middle channel, a water inlet pipe is installed at the center of the inner channel, and a water outlet is provided on the top of the inner channel.

[0007] The inner channel is a detachable structure, which intercepts most pollutants and is cleaned regularly. At the same time, the outer channel is flushed through the manholes set in the outer channel. Large pieces of filter material are placed in the cleaning layer of the outer channel. On the one hand, it can provide a growth place for microorganisms and further purify the water quality. On the other hand, it is convenient for flushing the dirt blockage at the bottom.

[0008] Preferably, the inner channel comprises a top fill layer, a small filter layer is filled under the fill layer, a large filter layer is filled under the small filter layer, a built-in slag removal layer is installed under the large filter layer, the outer layer of the inner channel is an outer filter plate, and an inner filter plate is arranged inside the outer filter plate. The inner channel is provided with multiple filter plates and fillers, so that most pollutants are intercepted in the inner channel, the inner area is small, and the structure is detachable, which is convenient for cleaning and maintenance.

[0009] Preferably, a dust shield and a first gas outlet are provided inside the gas chamber, and the dust shields are regularly arranged around the gas chamber. When the gas flows to the dust shield, it is intercepted by the dust shield due to gravity.

[0010] Preferably, a water outlet hole is provided at the junction of the water inlet pipe and the inner channel, and the aperture of the water outlet hole gradually decreases from top to bottom, so that water flows more evenly through the filler in the inner channel, allowing plants on the fill layer to easily absorb nutrients in the water.

[0011] Preferably, the outer channel, the middle channel and the inner channel are all cylindrical structures. The cylindrical structure saves floor space, has no dead corners compared to the square structure, and makes better use of the area.

[0012] Preferably, the height of the outer channel is not less than that of the middle channel and the inner channel, and the height of the outer channel includes the slag removal layer. In order to facilitate maintenance and a longer hydraulic retention time, the water quality purified by the inner channel is further purified.

[0013] Preferably, the small filter material layer is any one of quartz sand or crushed stone or a mixture thereof, with a particle diameter of no more than 4 mm, the large filter material layer is crushed stone, with a particle diameter of 6-18 mm, the large block filter material is pebbles, and the volume ratio of the outer channel plus the middle channel to the volume of the inner channel is no less than 1 / 10. The filter materials of different aggregates can delay the clogging of the filter pool and provide a habitat for microorganisms. At the same time, the strength of the filter pool structure is enhanced.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. The inner channel is a detachable structure. According to the water head height at the outlet of the inner channel, the blockage situation is judged, and the inner channel is regularly cleaned. At the same time, the outer channel is flushed and ventilated through the manhole provided in the outer channel, making it easy to replace the filter media in the filter tank and reducing the phenomena of blockage and insufficient oxygen supply.

[0016] 2. The inner channel, middle channel and outer channel in the filter tank are all cylindrical structures, which can make full use of the floor area, have higher treatment efficiency, and there will be no dead water flow areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present utility model;

[0018] Figure 2 is a schematic structural diagram of the inner channel of the present utility model;

[0019] Figure 3 is a schematic structural diagram of the water inlet pipe of the present utility model;

[0020] Figure 4 is a schematic structural diagram of the inner filter plate of the present utility model.

[0021] In the figure: 1, inner channel; 101, soil filling layer; 102, small filter media layer; 103, large filter media layer; 104, built-in slag cleaning layer; 105, inner filter plate; 106, outer filter plate; 2, water outlet; 3, middle channel; 4, outer channel; 5, retaining wall; 6, large filter media; 7, manhole; 8, slag cleaning layer; 9, intercepting screen; 10, water inlet; 11, water inlet pipe; 1101, water outlet holes. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0023] Please refer to Figures 1 to 4, an ecological filter sewage treatment device, including a retaining wall 5 and a water inlet pipe 11. An outer channel 4 is arranged inside the retaining wall 5. A slag cleaning layer 8 is provided at the bottom of the outer channel 4. Large filter materials 6 are filled inside the slag cleaning layer 8. An intercepting sieve 9 is installed on the top of the large filter materials 6. A water inlet 10 is opened in the upper part of the intercepting sieve 9. A manhole 7 is provided in the slag cleaning layer 8. A middle channel 3 is installed inside the outer channel 4. An inner channel 1 is installed inside the middle channel 3. A water inlet pipe 11 is installed at the center of the inner channel 1. An outlet 2 is provided at the top of the inner channel 1.

[0024] The inner channel 1 includes a top soil filling layer 101. A small filter material layer 102 is filled below the soil filling layer 101. A large filter material layer 103 is filled below the small filter material layer 102. An internal slag cleaning layer 104 is installed below the large filter material layer 103. The outer layer of the inner channel 1 is an outer filter plate 106. An inner filter plate 105 is provided inside the outer filter plate 106. An outlet hole 1101 is opened at the joint part of the water inlet pipe 11 and the inner channel 1. The aperture of the outlet hole 1101 gradually decreases from top to bottom.

[0025] The outer channel 4, the middle channel 3 and the inner channel 1 are all of cylindrical structures. The height of the outer channel 4 is not less than the heights of the middle channel 3 and the inner channel 1.

[0026] The small filter material layer 102 is any one or a mixture of quartz sand or crushed stones, and the particle diameter is not greater than 4 mm. The large filter material layer 103 is crushed stones, and the particle diameter is 6 - 18 mm. The large filter materials 6 are pebbles. The ratio of the volume of the outer channel 4 plus the middle channel 3 to the volume of the inner channel 1 is not less than 1 / 10.

[0027] The inner channel 1 is of a detachable structure. Most pollutants are intercepted by the inner channel 1, and the inner channel 1 is cleaned regularly. At the same time, the outer channel 4 is flushed according to the manhole 7 provided in the outer channel 4. The large filter materials 6 are placed in the slag cleaning layer 8 of the outer channel. On the one hand, it can provide a growth place for microorganisms to further purify the water quality. On the other hand, it is convenient for flushing the dirt blockage at the bottom. The inner channel 1 is provided with multiple filter plates and fillers, so that most pollutants are intercepted in the inner channel 1. The internal area is small, and it is of a detachable structure, which is convenient for cleaning and maintenance. For the convenience of maintenance and a longer hydraulic retention time, the water quality purified by the inner channel 1 is further purified. The height of the outer channel is not less than the heights of the middle channel and the inner channel. Different aggregate filter materials in the filter tank can delay the blockage of the filter tank, provide a habitat for microorganisms, and at the same time enhance the strength of the filter tank structure.

[0028] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An ecological filter sewage treatment device, comprising a retaining wall (5) and a water inlet pipe (11), characterized in that, An outer channel (4) is provided inside the retaining wall (5). A slag cleaning layer (8) is provided at the bottom of the outer channel (4). Large filter media (6) is filled inside the slag cleaning layer (8). An intercepting sieve (9) is installed on top of the large filter media (6). A water inlet (10) is provided at the upper part of the intercepting sieve (9). A manhole (7) is provided in the slag cleaning layer (8). A middle channel (3) is installed inside the outer channel (4). An inner channel (1) is installed inside the middle channel (3). A water inlet pipe (11) is installed at the center of the inner channel (1). An outlet (2) is provided at the top of the inner channel (1).

2. The ecological filter sewage treatment device according to claim 1, characterized in that: The inner channel (1) includes a top soil filling layer (101). A small filter media layer (102) is filled below the soil filling layer (101). A large filter media layer (103) is filled below the small filter media layer (102). An internal slag cleaning layer (104) is installed below the large filter media layer (103). The outer layer of the inner channel (1) is an outer filter plate (106). An inner filter plate (105) is provided inside the outer filter plate (106).

3. The ecological filter sewage treatment device according to claim 1, characterized in that: Water outlet holes (1101) are provided at the joint part of the water inlet pipe (11) and the inner channel (1). The aperture of the water outlet holes (1101) gradually decreases from top to bottom.

4. The ecological filter sewage treatment device according to claim 1, characterized in that: The outer channel (4), the middle channel (3) and the inner channel (1) are all of cylindrical structures.

5. The ecological filter sewage treatment device according to claim 1, characterized in that: The height of the outer channel (4) is not less than the heights of the middle channel (3) and the inner channel (1).

6. The ecological filter sewage treatment device according to claim 2, characterized in that: The small filter media layer (102) is made of quartz sand or crushed stones, and the particle diameter is not more than 4 mm.

7. The ecological filter sewage treatment device according to claim 2, characterized in that: The large filter media layer (103) is made of crushed stones, and the particle diameter is 6 - 18 mm.

8. The ecological filter sewage treatment device according to claim 1, characterized in that: The large filter media (6) is made of pebbles.

9. The ecological filter sewage treatment device according to claim 1, characterized in that: The ratio of the volume of the outer channel (4) plus the middle channel (3) to the volume of the inner channel (1) is not less than 1 / 10.

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