CN215161951U - Bank protection system for purification treatment of initial rainwater and mixed-connection sewage - Google Patents

Abstract

The utility model relates to a sewage treatment technical field is a shore protection system who is used for initial stage rainwater and meets sewage purification treatment particularly, including sump pit, dirty inspection shaft and the vertical current undercurrent wetland structure of arranging of rain and sewage in mixture, dirty inspection shaft of arranging of rain and sewage in mixture in be equipped with intercommunication to the hydraulic pipeline of the top of vertical current undercurrent wetland structure, the sump pit in be equipped with intercommunication to the fortune water pipeline of the bottom of vertical current undercurrent wetland structure, vertical current undercurrent wetland structure including vegetation buffer layer, metalling, filler water purification layer, crossing water layer and the waterproof layer that from top to bottom sets gradually. The utility model combines the characteristics of the traditional water conservancy revetment, has strong practicability and functionality, and can purify initial rainwater while intensively treating the rainwater and sewage mixed sewage; the method is wide in application, simple in construction and capable of being used in river bank protection; meanwhile, the landscape effect of the river channel environment is optimized, and surface runoff around the river bank can be effectively reduced.

Description

Bank protection system for purification treatment of initial rainwater and mixed-connection sewage

Technical Field

The utility model relates to a sewage treatment technical field is a shore protection system that is used for initial stage rainwater and connects sewage purification treatment thoughtlessly particularly.

Background

With the accelerated development of urbanization, rivers in many towns are polluted, and surface pollutants including solid wastes, livestock domestic sewage, farmland pesticides and the like are flowed into and collected into the rivers along with surface runoff due to rainfall erosion, so that the problem of black and odorous water frequently occurs. The river polluted by non-point sources has high prevention and control difficulty, the pollutant has strong dispersibility and is difficult to detect, and the traditional industrial sewage treatment method has limited use scale and high cost.

Disclosure of Invention

An object of the utility model is to solve prior art's not enough, provide a shore protection system that is used for initial stage rainwater and connects sewage purification treatment thoughtlessly, carry out the centralized processing back to the sewage of taking out in the sewage inspection shaft and discharge.

In order to realize the aim, the bank protection system for purifying initial rainwater and mixed sewage comprises a water collecting well, a rainwater and sewage mixed drainage inspection well and a vertical flow subsurface flow wetland structure, wherein a water conveying pipeline communicated to the top of the vertical flow subsurface flow wetland structure is arranged in the rainwater and sewage mixed drainage inspection well, a water conveying pipeline communicated to the bottom of the vertical flow subsurface flow wetland structure is arranged in the water collecting well, and the vertical flow subsurface flow wetland structure comprises a vegetation buffer layer, a gravel layer, a filler water purification layer, a water passing layer and a waterproof layer which are sequentially arranged from top to bottom.

The utility model discloses still have following preferred technical scheme:

the catch basin with rain and sewage thoughtlessly arrange the inspection shaft and establish relatively, vertical current undercurrent wetland structure set up in the catch basin with rain and sewage thoughtlessly arrange between the inspection shaft.

The water conveying pipeline comprises an upper layer perforated pipe and a sewage pump which are connected, and the upper layer perforated pipe is communicated to the upper part of the vertical flow subsurface flow wetland structure through a rain and sewage mixed drainage inspection well.

The water conveying pipeline comprises a lower perforated pipe, and the lower perforated pipe is arranged at the bottom of the water passing layer.

And a rammed soil layer is also arranged on the lower layer of the waterproof layer.

The water collecting well, the rain and sewage mixed drainage inspection well and the vertical flow subsurface flow wetland structure are arranged on one side of the revetment, which is far away from the river channel.

And ecological fillers are arranged in the filler water purification layer.

The ecological filler comprises zeolite, biochar and volcanic rock.

Slag and gravel are arranged in the water passing layer according to the proportion of 1: 1.

The vegetation buffer layer is provided with a concave structure, and an overflow pipe communicated to the filler water purification layer is arranged in the concave structure.

Beneficial effects of the utility model

Compared with the prior art, the utility model, the composite structure is simple and feasible, easy to install and dismantle, the vertical flow subsurface wetland is reformed by the traditional hard revetment, the earth ramming is carried out on the bottom of the revetment along the bottom excavation line, the geomembrane waterproof layer is laid, the vertical flow subsurface wetland structure is formed by mixing graded broken stones, ecological matrix fillers and slag gravels from top to bottom, the sewage is discharged to the vertical flow subsurface wetland structure behind the retaining wall through the sewage pump, the sewage in the inspection well for the mixed drainage of rain and sewage is centralized, wherein the vegetation buffer layer is used for reducing the pollution silt particles directly affluxing the river channel by the rainwater, the filler water purification layer is provided with the broken stones from the upper level to primarily filter the insoluble pollutants with larger particle size, the lower infiltration effect and the plant absorption effect of the water are used for gradually purifying the smaller and insoluble pollutants in the water, finally, the filtered water is converged into a water collecting well; simultaneously, the recessed structure of plant buffer layer can purify the initial stage rainwater, and when the rainwater continued to increase, the rainwater pipeline can be discharged into through the overflow mouth to the water that goes out to the infiltration effect through water purifies through filler water purification layer, and its advantage lies in:

the bank protection system combines the characteristics of the traditional water conservancy bank protection, has strong practicability and strong functionality, and can purify initial rainwater while intensively treating rainwater and sewage mixed sewage; the method has the advantages of wide application, simple construction, relatively low cost, strong flexibility and capability of flexibly adjusting the engineering quantity according to the water quality treatment scale, and can be used in river bank protection; simultaneously, the landscape effect of the river channel environment is optimized, surface runoff around the river bank can be effectively reduced, and the method has important significance for effective rainfall flood management of the river channel.

Drawings

Fig. 1 is a schematic front vertical view of the present invention.

Fig. 2 is a schematic side sectional view of the present invention.

Fig. 3 is a plan view of the present invention.

In the figure: 1. the inspection well comprises a rain and sewage mixed drainage inspection well 2, a lower layer perforated pipe 3, an overflow pipe 4, an upper layer perforated pipe 5, a vegetation buffer layer 6, a crushed stone layer 7, a filler water purification layer 8, a water passing layer 9, a water proof layer 10, a retaining wall 11, an excavation line 12, a vertical flow subsurface flow wetland structure 13, a sewage pump 14 and a water collecting well.

Detailed Description

The structure and principle of such a device will be apparent to those skilled in the art from the following further description of the invention with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The utility model provides a shore protection system that is used for initial stage rainwater and thoughtlessly connects sewage purification treatment mainly includes the triplex, and vegetation buffer layer, pipeline cloth water layer and filler water purification layer three major parts are said promptly, and the following illustration is carried out to it in combination with the attached drawing.

Referring to fig. 1, 2 and 3, the bank protection system comprises a water collecting well, a rain and sewage mixed drainage inspection well, an upper layer perforated pipe, a lower layer perforated pipe and a vertical flow subsurface flow wetland structure, wherein the water collecting well and the rain and sewage mixed drainage inspection well are arranged oppositely, and the vertical flow subsurface flow wetland structure is arranged between the water collecting well and the rain and sewage mixed drainage inspection well. The upper layer perforated pipe is communicated to the upper part of the vertical flow subsurface flow wetland structure through a rain and sewage mixed drainage inspection well, and a sewage pump is connected to the upper layer perforated pipe, so that sewage in the rain and sewage mixed drainage inspection well is conveyed to the upper side of the vertical flow subsurface flow wetland structure, and the sewage is purified through the vertical flow subsurface flow wetland structure. And the lower perforated pipe is used for conveying the sewage purified by the vertical flow subsurface flow wetland structure to the water collecting well.

The vertical flow subsurface wetland structure comprises a vegetation buffer layer, a gravel layer, a filler water purification layer, a water passing layer and a waterproof layer which are sequentially arranged from top to bottom, wherein the vegetation buffer layer is used for reducing polluted silt particles which are washed by rainwater and directly flow into a river channel, and gradually purifying smaller and insoluble pollutants in water through the plant absorption action, and plants such as allium fistulosum, calamus, canna and the like are preferably planted; the crushed stone layer is used for primarily filtering insoluble pollutants with larger particle sizes; the filler water purification layer is used for further removing the content of soluble pollutants such as nitrogen, phosphorus and the like in water and carrying out staged precipitation treatment, and the filler water purification layer comprises ecological fillers with strong porosity such as zeolite, biochar, volcanic rock and the like; the water passing layer is used for enabling rainwater to rapidly pass through downwards, for example, slag and gravel are arranged in the water passing layer according to the ratio of 1:1 in the embodiment, and the bottom of the water passing layer is provided with the lower perforated pipe; the waterproof layer is used to prevent rainwater from further leaking downwards, for example, the waterproof layer in this embodiment is made of waterproof geotextile. In addition, a rammed soil layer is arranged on the lower layer of the waterproof layer and is used for bearing the rest structures, for example, the rammed earth is adopted in the embodiment.

When the vertical flow submerged flow inspection well is used, domestic sewage and agricultural sewage at the periphery of a river bank are converged into the rain and sewage mixed drainage inspection well on one side through different drainage pipelines, a sewage pump is arranged in the rain and sewage mixed drainage inspection well and can pump the sewage into the vertical flow submerged flow wetland structure behind the retaining wall, the sewage enters the upper layer perforated pipe and then is uniformly converged into the vegetation buffer layer, and most of coarse particle pollutants are filtered under the action of a plant root system and a gravel layer. Then sewage continuously infiltrates into the filler water purification layer, the content of soluble pollutants such as nitrogen, phosphorus and the like in the water is further removed through the staged precipitation treatment of ecological fillers with strong porosity such as zeolite, biochar, volcanic rock and the like, and finally the water flows pass through the water passing layer with faster drainage and are gathered into the water collecting well through the lower perforated pipe after purification.

When the rainfall produces the road surface runoff, the higher initial stage rainwater of pollutant concentration drains into the recessed structure of the thick plant buffer layer of bank protection retaining wall, and this plant buffer layer can purify initial stage rainwater. When the runoff continuously increases, the water in the concave plant buffer layer is discharged into the rainwater pipeline through an overflow port at the upper end of the embedded rainwater overflow pipe.

Claims (10)

1. The utility model provides a bank protection system that is used for initial stage rainwater and meets sewage purification treatment in mixture, its characterized in that includes sump pit, the dirty inspection shaft of arranging of rain and sewage and vertical current undercurrent wetland structure, the dirty inspection shaft of arranging of rain and sewage in mixture in be equipped with the raceway who communicates to the top of vertical current undercurrent wetland structure, the sump pit in be equipped with communicate to the water carrying pipeline of the bottom of vertical current undercurrent wetland structure, vertical current undercurrent wetland structure including vegetation buffer layer, metalling, filler water purification layer, crossing water layer and the waterproof layer that sets gradually from top to bottom.

2. The revetment system according to claim 1, wherein said catch basin is disposed opposite to said drainage inspection well, and said vertical flow subsurface wetland structure is disposed between said catch basin and said drainage inspection well.

3. The revetment system according to claim 1, wherein the water pipeline comprises an upper perforated pipe and a sewage pump connected with each other, and the upper perforated pipe is communicated to the upper part of the vertical flow subsurface flow wetland structure through a rain and sewage mixed drainage inspection well.

4. The revetment system of claim 1, wherein said water transport conduit comprises a perforated lower layer, said perforated lower layer being disposed at the bottom of said drainage layer.

5. The revetment system of claim 1, wherein said waterproofing layer further comprises a rammed earth layer on the lower layer.

6. The revetment system according to claim 1, wherein the water collecting well, the rain and sewage mixed drainage inspection well and the vertical flow subsurface wetland structure are arranged on the revetment far from the inner side of the river channel.

7. The bank protection system for purification treatment of initial rainwater and mixed sewage according to claim 1, wherein ecological fillers are arranged in the filler water purification layer.

8. The revetment system according to claim 7, wherein said ecological fillers comprise zeolite, charcoal and volcanic rock.

9. The bank protection system for purifying initial rainwater and mixed sewage as claimed in claim 1, wherein slag and gravel are arranged in the water passing layer in a ratio of 1: 1.

10. The revetment system of claim 1, wherein said vegetation buffer layer has a recessed structure with an overflow pipe connected to a filler clean water layer.

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