Micro-ecological filter bed device

Abstract

The utility model discloses a micro-ecological filter bed device which is buried in a low-lying terrain with serious urban runoff pollution and comprises a runoff pollution interception unit, a rainwater storage unit and a water supply and drainage system unit, the runoff pollution interception units are arranged on the periphery of the low-lying terrain; the rainwater storage unit is buried in the center of the low-lying land; the water supply and drainage system unit is connected with the runoff pollution interception unit and the rainwater storage unit through pipelines. According to the micro-ecological filter bed device, pollutants can be effectively intercepted when runoff pollution is generated in rainy seasons, and filtration and storage of the pollutants are realized; in the dry season, drip irrigation is conducted on the runoff pollution intercepting unit and the rainwater storage unit through the submersible pump, so that basic growth of plants, microorganisms and the like is guaranteed, and it is ensured that the combined action of plant-microorganism and physical filtering adsorption can be achieved.

Description

Technical Field

[0001] The utility model belongs to the field of rainwater treatment, and in particular relates to a microecological filter bed device for treating rainwater runoff pollution. Background Art

[0002] With the acceleration of urbanization and the intensification of global climate change, the impermeable area of ​​urban surfaces has increased year by year, resulting in a series of problems such as urban waterlogging and non-point source pollution. Rainwater washes different catchment surfaces, increasing pollutants in runoff and deteriorating water quality. The runoff contains a large amount of sediment and high concentrations of heavy metals. If the runoff is not treated or treated substandard and seeps into the ground, it will lead to excessive levels of heavy metals and toxic chemicals in the soil, causing soil necrosis and groundwater pollution. The traditional road drainage system measurement is based on the removal of rainwater as soon as possible. However, untreated runoff rainwater is directly discharged into downstream water bodies, which will cause serious pollution to the water bodies. At the same time, the rapid formation of surface runoff by rainwater will cause serious road waterlogging. Most of the reasons are runoff pollution caused by rainwater, especially after local areas of the city are flooded, a large amount of garbage mixed with sediment forms pollution in the rainwater. If it is directly discharged into the river, it will cause more serious pollution.

[0003] At present, bioretention facilities are usually used to intercept and filter rainwater runoff pollution in local low-lying areas. The principle is generally to store and purify runoff rainwater through plants, soil and microbial systems. However, the following problems exist in existing bioretention ponds: 1) In some local areas during the dry season, the water stored in the bioretention pond cannot be supplied to the upper soil, causing plants, microorganisms, etc. to die due to lack of water; 2) The structure of conventional bioretention ponds is a sealed reinforced concrete structure, which causes the rainwater stored in the bioretention pond to deteriorate and become smelly due to lack of oxygen due to long-term storage. Utility Model Content

[0004] The purpose of the utility model is to overcome the defects of the prior art, and to address the technical problems that in some areas during the dry season, the water stored in the biological retention pond cannot be supplied to the upper soil, causing the death of plants, microorganisms, etc. due to lack of water, and the conventional biological retention pond structure is a sealed reinforced concrete structure, which causes the rainwater stored in the biological retention pond to deteriorate and become smelly due to lack of oxygen due to long-term storage.

[0005] In order to solve the above problems, the utility model adopts a microecological filter bed device. To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A microecological filter bed device, comprising a runoff pollution interception unit, a rainwater storage unit and a water supply and drainage system unit; the runoff pollution interception unit is arranged around a low-lying terrain; the rainwater storage unit is buried in the center of the low-lying terrain; the water supply and drainage system unit is connected to the runoff pollution interception unit and the rainwater storage unit through a pipeline;

[0007] The runoff pollution interception unit includes, from bottom to top, a waterproof layer, an activated carbon layer, a gravel layer, a soil and microorganism layer, and a plant layer;

[0008] The rainwater storage unit comprises a rainwater pool, a filter layer and emergent plants from bottom to top, and the emergent plants are planted in the filter layer;

[0009] The water supply and drainage system unit includes a clear water tank, a submersible pump, a water supply pipeline and a drainage pipe. The clear water tank is arranged at the bottom of the runoff pollution interception unit, the submersible pump is located in the clear water tank, the water supply pipeline is arranged in the soil and microorganism layer of the runoff pollution interception unit and the filter layer of the rainwater storage unit, the submersible pump is connected to the water supply pipeline; the drainage pipe is arranged at the bottom of the runoff pollution interception unit; the clear water tank and the rainwater tank are connected through a connecting pipe.

[0010] Furthermore, the waterproof layer adopts a reinforced concrete structure.

[0011] Furthermore, the walls of the rainwater pool are cast with breathable and impermeable sand material, the filter layer is formed by quartz sand embedded in a flocculent sponge material, and the bottom of the filter layer is convex downward to form an arc shape.

[0012] Furthermore, the wall of the clean water tank is formed by casting breathable and anti-seepage sand material, and the submersible pump is placed at the bottom of the clean water tank.

[0013] Furthermore, the water supply pipeline includes a water supply main pipe and a water supply branch pipe, the outlet end of the submersible pump is connected to the water supply main pipe, and the water supply main pipe is connected to a plurality of water supply branches; the water supply branch pipes are arranged in the soil and microbial layer of the runoff pollution interception unit and the filter layer of the rainwater storage unit.

[0014] Furthermore, the water supply branch pipe has holes at regular intervals.

[0015] Furthermore, a connecting pipe between the clean water tank and the rainwater tank is arranged near the upper part of the rainwater tank.

[0016] Furthermore, an inclined slope is provided at the bottom of the clear water tank.

[0017] Furthermore, the inclination gradient of the bottom of the clear water tank is not less than 0.3%.

[0018] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0019] The microecological filter bed device of the utility model can effectively intercept pollutants when runoff pollution occurs in the rainy season, and realize their filtration and storage; in the dry season, the runoff pollution interception unit and the rainwater storage unit are drip-irrigated by a submersible pump to ensure the basic growth of plants and microorganisms, and ensure that the joint effects of plant-microorganism and physical filtration and adsorption can be exerted. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A cross-sectional view showing the microecological filter bed device of this embodiment.

[0021] Figure 2 An upper plan view showing the microecological filter bed device of this embodiment.

[0022] Figure 3 A middle-level plan view showing the microecological filter bed device of this embodiment.

[0023] Figure 4 A lower plan view showing the microecological filter bed device of this embodiment.

[0024] Figure 5 A cross-sectional view showing the microecological filter bed device of this embodiment during the rainy season.

[0025] Figure 6 A cross-sectional view showing the microecological filter bed device of this embodiment during the dry season.

[0026] In the figure, there are runoff pollution interception unit 1, rainwater storage unit 2, water supply and drainage system unit 3, waterproof layer 11, activated carbon layer 12, gravel layer 13, soil and microorganism layer 14, plant layer 15, rainwater pool 21, filtration layer 22 and emergent plants 23, clean water pool 31, submersible pump 32, water supply pipeline 33, drainage pipe 34, water supply main pipe 331, and water supply branch pipe 332. DETAILED DESCRIPTION

[0027] The present invention will be described in detail below according to the accompanying drawings and preferred embodiments, and the purpose and effect of the present invention will become more clear. The present invention will be further described in detail below in combination with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] like Figures 1 to 6As shown, the microecological filter bed device of this embodiment is buried in a low-lying terrain where urban runoff pollution is relatively serious, and includes a runoff pollution interception unit 1, a rainwater storage unit 2, and a water supply and drainage system unit 3; the runoff pollution interception unit 1 is arranged around the low-lying terrain; the rainwater storage unit 2 is buried underground in the low-lying terrain; the water supply and drainage system unit 3 connects the runoff pollution interception unit 1 and the rainwater storage unit 2 through a pipeline.

[0029] The runoff pollution interception unit 1 in this embodiment includes, from bottom to top, a waterproof layer 11, an activated carbon layer 12, a gravel layer 13, a soil and microorganism layer 14, and a plant layer 15; the waterproof layer 11 adopts a reinforced concrete structure.

[0030] The rainwater storage unit 2 in this embodiment includes a rainwater pool 21, a filter layer 22 and emergent plants 23 from bottom to top. The wall of the rainwater pool 21 is cast with a breathable and impermeable sand material, and the filter layer 22 is formed by quartz sand embedded in a flocculent sponge material. The whole is convex downward to form an arc shape; the emergent plants 23 are planted in the filter layer 22.

[0031] The water supply and drainage system unit 3 of this embodiment includes a clear water tank 31, a submersible pump 32, a water supply pipeline 33 and a drainage pipe 34. The clear water tank 31 is arranged at the bottom of the runoff pollution interception unit 1, and the wall of the clear water tank 31 is cast and formed by a breathable and impermeable sand material; the submersible pump 32 is placed at the bottom of the clear water tank 31, and the outlet end of the submersible pump 32 is connected to the water supply main pipe 331 of the water supply pipeline 33, and the water supply main pipe 331 is connected to a plurality of water supply branch pipes 332; the water supply branch pipes 332 are arranged in the soil and microbial layer 14 of the runoff pollution interception unit 1 and the filter layer 22 of the rainwater storage unit 2. The water supply branch pipe 332 has small holes at regular intervals. The drainage pipe 34 is arranged at the bottom of the runoff pollution interception unit 1 and is connected to the filter layer 22 and the emergent plant 23 of the rainwater storage unit 2.

[0032] In this embodiment, a connecting pipe is provided between the rainwater pool 21 and the clean water pool 31 . The connecting pipe is provided near the upper part of the rainwater pool 21 to ensure that the relatively clear rainwater in the upper part of the rainwater pool 21 enters the clean water pool 31 through the connecting pipe.

[0033] The bottom of the clear water tank 31 of this embodiment is provided with a certain inclination slope, and the inclination slope is not less than 0.3%.

[0034] The operating principle of the microecological filter bed device of this embodiment is as follows:

[0035] During the rainy season, Figure 5As shown, the sewage generated by surface runoff first enters the runoff pollution interception unit 1, passes through the plant layer 15, the soil and microorganism layer 14, the gravel layer 13, and the activated carbon layer 12 in sequence, and finally the purified water is discharged into the rainwater storage unit 2 through the drainage pipe 34 arranged at the bottom; it slowly enters the rainwater pool 21 through the infiltration effect of the filter layer 22, and after the water in the rainwater pool 21 rises to a certain water level, it enters the clean water pool 31 through the connecting pipe, thereby realizing storage and regulation of the purified runoff water body.

[0036] During the dry season, Figure 6 As shown, plants in the runoff pollution interception unit 1 and the rainwater storage unit 2 are short of water, the submersible pump 32 is turned on, and the water in the clean water tank 31 is transported to the plant layer 15 of the runoff pollution interception unit 1 and the emergent plants 23 of the rainwater storage unit 2 through the water supply main pipe 331 and the water supply branch pipe 332 of the water supply pipeline 33.

[0037] Those skilled in the art can understand that the above are only preferred examples of the utility model and are not intended to limit the utility model. Although the utility model is described in detail with reference to the above examples, those skilled in the art can still modify the technical solutions recorded in the above examples or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A microecological filter bed device, characterized in that: It includes a runoff pollution interception unit, a rainwater storage unit and a water supply and drainage system unit; the runoff pollution interception unit is arranged around the low-lying terrain; the rainwater storage unit is buried in the center of the low-lying terrain; the water supply and drainage system unit is connected to the runoff pollution interception unit and the rainwater storage unit through a pipeline; The runoff pollution interception unit includes, from bottom to top, a waterproof layer, an activated carbon layer, a gravel layer, a soil and microorganism layer, and a plant layer; The rainwater storage unit comprises a rainwater pool, a filter layer and emergent plants from bottom to top, and the emergent plants are planted in the filter layer; The water supply and drainage system unit includes a clear water tank, a submersible pump, a water supply pipeline and a drainage pipe. The clear water tank is arranged at the bottom of the runoff pollution interception unit, the submersible pump is located in the clear water tank, the water supply pipeline is arranged in the soil and microorganism layer of the runoff pollution interception unit and the filter layer of the rainwater storage unit, the submersible pump is connected to the water supply pipeline; the drainage pipe is arranged at the bottom of the runoff pollution interception unit; the clear water tank and the rainwater tank are connected through a connecting pipe.

2. The microecological filter bed device according to claim 1, characterized in that: The waterproof layer adopts a reinforced concrete structure.

3. The microecological filter bed device according to claim 1, characterized in that: The walls of the rainwater pool are cast with breathable and anti-seepage sand material, the filter layer is formed by embedding quartz sand in a flocculent sponge material, and the bottom of the filter layer is convex downward to form an arc shape.

4. The microecological filter bed device according to claim 1, characterized in that: The wall of the clean water tank is formed by casting breathable and anti-seepage sand material, and the submersible pump is placed at the bottom of the clean water tank.

5. The microecological filter bed device according to claim 4, characterized in that: The water supply pipeline includes a water supply main pipe and a water supply branch pipe. The outlet end of the submersible pump is connected to the water supply main pipe, and the water supply main pipe is connected to a plurality of water supply branches. The water supply branch pipes are arranged in the soil and microbial layer of the runoff pollution interception unit and the filter layer of the rainwater storage unit.

6. The microecological filter bed device according to claim 5, characterized in that: The water supply branch pipe has holes at regular intervals.

7. The microecological filter bed device according to claim 1, characterized in that: The connecting pipe between the clean water pool and the rain water pool is arranged near the upper part of the rain water pool.

8. The microecological filter bed device according to claim 1, characterized in that: The bottom of the clear water tank is provided with an inclined slope.

9. The microecological filter bed device according to claim 8, characterized in that: The inclination gradient of the bottom of the clear water tank is not less than 0.3%.

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