CN217128427U

CN217128427U - Biological detention equipment

Info

Publication number: CN217128427U
Application number: CN202220530693.5U
Authority: CN
Inventors: 俎海发; 李金�; 沈晓荣; 仇璐; 杨丰恺
Original assignee: PowerChina Huadong Engineering Corp Ltd
Current assignee: PowerChina Huadong Engineering Corp Ltd
Priority date: 2022-03-10
Filing date: 2022-03-10
Publication date: 2022-08-05
Anticipated expiration: 2032-03-10

Abstract

The utility model relates to a biological detention equipment. Is applicable to the field of bioretention facilities. The utility model adopts the technical proposal that: a bioretention device characterized by: the system is provided with a bioretention tank body, wherein an upper treatment unit for directly lowering water above the bioretention tank body and a lower treatment unit for treating road surface runoff rainwater are arranged in the bioretention tank body, a plurality of drain pipes are uniformly distributed in the middle of the bioretention tank body, the drain pipes are all connected with a water outlet pipe pipeline, the upper treatment unit is distributed above the drain pipes, the lower treatment unit is distributed below the drain pipes, a plurality of water distribution pipes are uniformly distributed below the lower treatment unit, and the water distribution pipes are all connected with a water inlet pipe pipeline; the upper layer processing unit is sequentially provided with a soil covering layer and an upper layer filtering layer from top to bottom; the lower layer processing unit is sequentially provided with a lower layer filter layer and a transition layer from top to bottom.

Description

Biological detention equipment

Technical Field

The utility model relates to a biological detention equipment. Is applicable to the field of bioretention facilities.

Background

The sponge city is a new generation of city rainfall flood management concept, and refers to a city which can be like a sponge and has good elasticity in the aspects of adapting to environmental changes, coping with natural disasters caused by rainwater and the like, and the city can also be called as a water elasticity city.

The biological detention facility refers to a facility for storing, permeating and purifying runoff rainwater through plants, soil and a microorganism system in a lower-lying area. The traditional bioretention facility has high removal rate of heavy metal, total phosphorus and ammonia nitrogen, but has unstable removal effect of total nitrogen, which is caused by that the bioretention facility releases nitrate nitrogen, resulting in high concentration of total nitrogen outflow. This results from nitrate nitrogen produced by denitrification in bioretention facilities increasing the effluent concentration of total nitrogen, causing non-point source pollution to water in surrounding areas.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: an object of the utility model is to provide a set up improvement type biological detention facility of inundation district, through connect the rainwater inlet tube and discharge the rainwater from the outlet pipe at biological detention pond middle part in biological detention bottom of the pool, form and inundate the district, create anaerobic environment in order to promote the denitrification to improve total nitrogen's clearance. Through effectively getting rid of pollutants such as nitrogen phosphorus, remain the efficiency of biological detention facility, improve the rainwater and collect the quality, increase the life of biological detention facility simultaneously. The utility model provides a biological detention equipment.

The utility model adopts the technical proposal that: a bioretention device characterized by: the system is provided with a bioretention tank body, wherein an upper treatment unit for directly lowering water above the bioretention tank body and a lower treatment unit for treating road surface runoff rainwater are arranged in the bioretention tank body, a plurality of drain pipes are uniformly distributed in the middle of the bioretention tank body, the drain pipes are all connected with a water outlet pipe pipeline, the upper treatment unit is distributed above the drain pipes, the lower treatment unit is distributed below the drain pipes, a plurality of water distribution pipes are uniformly distributed below the lower treatment unit, and the water distribution pipes are all connected with a water inlet pipe pipeline;

the upper layer processing unit is sequentially provided with a soil covering layer and an upper layer filtering layer from top to bottom;

the lower layer processing unit is sequentially provided with a lower layer filter layer and a transition layer from top to bottom.

An overflow well is arranged in the bioretention tank body, a water outlet pipe is paved in the middle of the overflow well, and a water inlet pipe is paved at the bottom of the overflow well.

The upper filter layer and the lower filter layer are sequentially provided with a coarse sand layer, a vermiculite layer and a zeolite layer from top to bottom, and the thickness proportion of the coarse sand layer, the vermiculite layer and the zeolite layer is 8: 1: 1.

the transition layer is a coarse sand layer.

And the permeable geotextiles are paved between the covering soil layer and the upper filter layer, below the upper filter layer, above the lower filter layer, between the lower filter layer and the transition layer and below the transition layer.

The water discharge pipe is uniformly provided with a plurality of water discharge holes, and the water distribution pipe is uniformly provided with a plurality of water distribution holes.

And planting plants on the covering soil layer.

The concrete base is paved at the bottom of the bioretention tank body.

The utility model has the advantages that: the method is characterized in that the wheat winter grass is planted on the overburden layer of the biological detention tank body of the biological detention equipment to be used as the vegetation layer, so that the ecological detention equipment has good water and soil retention capacity and attractive appearance; an upper filtering layer is laid under the soil covering layer, a plurality of drain pipes connected with a water outlet pipe in the overflow well are uniformly laid under the upper filtering layer, and a plurality of drain holes are uniformly formed in the drain pipes, so that the rainfall above the ecological retention equipment can be directly drained out of the regulating reservoir through the drain pipes connected with the water outlet pipe, the direct rainfall is purified, and in order to prevent the soil in the soil covering layer and the crushed stones in the upper filtering layer from moving downwards along with water flow to cause the blockage of the drain holes in the drain pipes, permeable geotextiles are laid between the soil covering layer and the upper filtering layer and below the upper filtering layer; laying a lower filtering layer and a transition layer below a drain pipe in the bioretention pond body, uniformly laying a plurality of water distribution pipes connected with a water inlet pipe in an overflow well below the transition layer, uniformly arranging a plurality of water distribution holes on the water distribution pipes, so that road surface rainwater runoff enters the bottom of the bioretention pond body through the water distribution pipes connected with the water inlet pipe, moves upwards from the bottom of the bioretention pond body, and is finally discharged through the drain pipe connected with a water outlet pipe in the middle of the bioretention pond body, in order to prevent crushed stones in the transition layer and the lower filtering layer from moving downwards and blocking the water distribution holes on the water distribution pipes, and paving water permeable cloth above the lower filtering layer, between the lower filtering layer and the transition layer and below the transition layer; and the lower layer treatment unit can achieve the effect of backwashing in a water inlet mode from bottom to top, so that frequent replacement of the filler is avoided, the service life of the biological detention tank is prolonged, and the rainwater treatment capacity is improved.

Drawings

Fig. 1 is a schematic structural view of a bioretention apparatus of the present invention.

The reference numbers in the figures illustrate: 1. covering a soil layer; 2. an upper filter layer; 3. a drain pipe; 4. a lower filter layer; 5. a transition layer; 6. a water distribution pipe; 7. a concrete base; 8. a water outlet pipe; 9. a water inlet pipe; 10. permeable geotextile, 11, overflow well.

Detailed Description

The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.

As shown in fig. 1, the bioretention equipment of the present embodiment has a bioretention tank body, an overflow well 11 is further provided in the bioretention tank body, a water outlet pipe 8 is provided in the middle of the overflow well 11 and is arranged along the radial direction of the overflow well 11 and penetrates through the bioretention tank body, and a water inlet pipe 9 is provided at the bottom of the overflow well 11 and is arranged along the radial direction of the overflow well 11 and penetrates through the bioretention tank body.

In this embodiment, a concrete base 7 is paved at the bottom of the bioretention tank body, a plurality of water distribution pipes 6 connected with a water inlet pipe 9 by pipelines are uniformly paved on the concrete base 7, and a plurality of water distribution holes are uniformly arranged on the water distribution pipes 6. So that the rainwater on the road surface can enter the bottom of the biological detention pool body through the water distribution pipe 6 connected with the water inlet pipe 9. Rainwater entering the bottom of the bioretention tank body permeates upwards, and impurities in rainwater on the road surface are removed when the rainwater passes through the transition layer 5 and the lower filtering layer 4. In this embodiment, the lower filter layer 4 has arranged coarse sand layer, vermiculite layer, zeolite layer from last to down in proper order, and wherein the thickness proportion of coarse sand layer, vermiculite layer, zeolite layer is 8: 1: 1; the transition layer 5 is a coarse sand layer. The middle part of the bioretention pond body is provided with a drain pipe 3 connected with a water outlet pipe 8 through a pipeline, the drain pipe 3 is evenly provided with a plurality of drain holes, and rainwater is discharged out of the bioretention pond through the water outlet pipe 8 connected with the drain pipe 3 through a pipeline. In this embodiment, the water outlet pipe 8 is installed in the radial direction of the overflow well 11 and penetrates the bioretention tank body. When the rainwater of bottom upwards permeates in the bioretention cell body, the rainwater can be kept in lower filter layer 4 temporarily, has formed a submerged area, has so strengthened the denitrification effect of whole bioretention equipment to the clearance of bioretention equipment to total nitrogen and nitrate nitrogen has been improved.

Furthermore, the upper part of the lower filtering layer 4, the space between the lower filtering layer 4 and the transition layer 5 and the lower part of the transition layer 5 are all paved with the permeable geotextile 10, so that the crushed stones in the lower filtering layer 4 and the transition layer 5 are prevented from moving downwards and entering the water distribution holes of the water distribution pipes 6 to cause the blockage of the water distribution holes; meanwhile, the lower layer treatment unit can achieve the backwashing effect in a water inlet mode from bottom to top, frequent replacement of the filler is avoided, the service life of the bioretention tank is prolonged, and meanwhile, the rainwater treatment capacity is improved.

In this embodiment, in order to solve the purification treatment of the direct precipitation in biological detention cell body upper portion in step for directly entering into behind the biological detention cell body through the rainwater of handling outside the biological detention cell body is discharged through the drain pipe 3 with 8 pipe connections of outlet pipe, arrange earthing layer 1 and upper filter layer 2 from the top down arranging outlet pipe 8 top at biological detention cell body middle part department. In this embodiment, the upper filter layer 2 has arranged coarse sand layer, vermiculite layer, zeolite layer from last to down in proper order, and wherein the thickness proportion of coarse sand layer, vermiculite layer, zeolite layer is 8: 1: 1. rainwater directly falling into the bioretention pond body is discharged out of the bioretention pond body through a drain pipe 3 connected with a water outlet pipe 8 after passing through a soil covering layer 1 and an upper filtering layer 2. In order to avoid the blockage of the drain pipe 3 caused by the downward movement of the gravels in the upper filtering layer 2 and the covering soil layer 1 along with the water flow, the permeable geotextile 10 is paved on the lower part of the upper filtering layer 2 and between the upper filtering layer 2 and the covering soil layer 1.

In this embodiment, vegetation is planted on the covering soil layer 1 for enhancing the water and soil conservation capability of the covering soil layer 1, and in this embodiment, winter wheat grass is planted on the covering soil layer 1.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A bioretention device characterized by: the system is provided with a bioretention tank body, wherein an upper treatment unit for directly lowering water above the bioretention tank body and a lower treatment unit for treating road surface runoff rainwater are arranged in the bioretention tank body, a plurality of drain pipes are uniformly distributed in the middle of the bioretention tank body, the drain pipes are all connected with a water outlet pipe pipeline, the upper treatment unit is distributed above the drain pipes, the lower treatment unit is distributed below the drain pipes, a plurality of water distribution pipes are uniformly distributed below the lower treatment unit, and the water distribution pipes are all connected with a water inlet pipe pipeline;

2. A bioretention device according to claim 1 wherein: an overflow well is arranged in the bioretention tank body, a water outlet pipe is paved in the middle of the overflow well, and a water inlet pipe is paved at the bottom of the overflow well.

3. A bioretention device according to claim 1 wherein: the upper filter layer and the lower filter layer are sequentially provided with a coarse sand layer, a vermiculite layer and a zeolite layer from top to bottom, and the thickness proportion of the coarse sand layer, the vermiculite layer and the zeolite layer is 8: 1: 1.

4. a bioretention device according to claim 1 wherein: the transition layer is a coarse sand layer.

5. A bioretention device according to claim 1 wherein: and the permeable geotextiles are paved between the covering soil layer and the upper filter layer, below the upper filter layer, above the lower filter layer, between the lower filter layer and the transition layer and below the transition layer.

6. A bioretention device according to claim 1 wherein: the water discharge pipe is uniformly provided with a plurality of water discharge holes, and the water distribution pipe is uniformly provided with a plurality of water distribution holes.

7. A bioretention device according to claim 1 wherein: and planting plants on the covering soil layer.

8. A bioretention device according to claim 1 wherein: the concrete base is paved at the bottom of the bioretention tank body.