Road rainwater runoff pollution control and purification system

Abstract

The present invention provides a road rainwater runoff pollution control and purification system, which is used to solve the technical problem that the existing technology cannot control the road rainwater runoff amount and runoff water quality. A road rainwater runoff pollution control and purification system includes a drainage well; a diversion box, the diversion box is arranged in the drainage well to receive rainwater flowing into the drainage well; an oil-separating and sand-separating well, the diversion box transports rainwater to the oil-separating and sand-separating well through a drainage pipe for oil-separating and sand-separating treatment; a filtering and purification device to filter the rainwater in the oil-separating and sand-separating well. Compared with the existing technology, this scheme is that the rainwater runoff from the motor vehicle or non-motor vehicle lane flows into the diversion box, and then is led to the facilities of the motor vehicle and non-motor vehicle isolation belt or tree belt through the drainage pipe for purification treatment, which plays a role in controlling the road rainwater runoff amount and runoff water quality.

Description

Technical Field

[0001] The invention relates to the field of rainwater runoff control, and in particular to a road rainwater runoff pollution control and purification system. Background Art

[0002] In recent years, rainwater runoff non-point source pollution has been serious in most cities in my country, and has become an important factor in the deterioration of urban river and lake water quality. Solving rainwater runoff non-point source pollution is one of the important ways to improve the urban water environment.

[0003] At present, the general practice of controlling road rainwater runoff is to divert rainwater to the non-separation belt / tree belt of the road for infiltration, retention and purification, which requires a certain amount of green space within the road range. In addition, in order to facilitate the diversion of rainwater to the green space, the green space is required to have a certain concave depth. Therefore, for some roads with very low greening rates, or for the overall landscape considerations, it is impossible to use concave roads, and the general practice of controlling road rainwater runoff cannot be implemented.

[0004] The water quality sampling results of a large amount of road rainwater runoff show that there is an initial flushing effect in runoff pollution, and the concentration of pollutants in the initial rainwater runoff is significantly higher than that in the later period. Therefore, as long as the pollution of rainwater runoff in the early period is controlled, a better pollution control effect can be achieved. Summary of the invention

[0005] The road rainwater runoff pollution control and purification system provided by the present invention is used to solve the technical problem that the road rainwater runoff volume and runoff water quality cannot be controlled in the prior art.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A road rainwater runoff pollution control and purification system, comprising:

[0008] Drainage wells;

[0009] A diverter box, the diverter box is arranged in the drainage well to receive rainwater flowing into the drainage well;

[0010] The oil-separating and sand-separating well, the diversion box transports rainwater to the oil-separating and sand-separating well through a drainage pipe for oil-separating and sand-separating treatment;

[0011] The filtering and purification device filters the rainwater in the oil-separating and sand-separating well.

[0012] Furthermore, the diversion box is installed at the water inlet of the drainage well, the top of the diversion box is open and a cover plate with a grille is installed at the opening.

[0013] Furthermore, a sewage interception basket is provided in the diversion box, and the sewage interception basket is installed at the opening of the diversion box and is placed below the cover plate.

[0014] Furthermore, an overflow channel connected to the drainage well is provided on the side wall of the diversion box, and the horizontal height of the overflow channel is higher than the horizontal height of the water inlet of the drainage pipe.

[0015] Furthermore, the water inlet of the drainage pipe is connected to the diversion box, the water outlet is connected to the upper part of the oil-separating and sand-setting well, and the horizontal height of the water inlet of the drainage pipe is higher than the horizontal height of the water outlet of the drainage pipe.

[0016] Furthermore, a guide pipe coaxially arranged with the oil-separation and sand-trapping well is installed in the oil-separation and sand-trapping well, and the outer diameter of the guide pipe is smaller than the inner diameter of the oil-separation and sand-trapping well, the bottom horizontal height of the guide pipe is higher than the bottom horizontal height of the oil-separation and sand-trapping well, and the upper horizontal height of the guide pipe is higher than the water outlet horizontal height of the drain pipe.

[0017] Furthermore, the filtering and purification device includes a sand cushion layer and a gravel layer arranged from bottom to top, a permeable water distribution pipe is laid in the gravel layer, one end of the permeable water distribution pipe is connected to the upper part of the oil-water separator and sand settling well, and the other end extends out of the gravel layer, and the port extending out of the gravel layer is an inspection port, and the horizontal height of the connection between the permeable water distribution pipe and the oil-water separator and sand settling well is lower than the horizontal height of the water outlet of the drain pipe.

[0018] Furthermore, the filtering and purification device includes a gravel layer, a sand filter layer and a water storage module arranged from bottom to top, and the water storage module is connected to the upper part of the oil-separation and sand-trapping well with an outlet pipe, and the horizontal height of the connection between the outlet pipe and the oil-separation and sand-trapping well is lower than the horizontal height of the water outlet of the drain pipe.

[0019] Furthermore, a permeable drainage pipe is laid in the gravel layer, and one end of the permeable drainage pipe extending out of the gravel layer is connected to the drainage well.

[0020] Furthermore, the top of the water storage module is covered with a permeable geotextile.

[0021] Compared with the prior art, the road rainwater runoff pollution control and purification system provided by the present invention has the following advantages:

[0022] The separation box design is adopted to introduce rainwater runoff with high initial pollution concentration into the oil-separating sand well for pretreatment, and then enter the filtration and purification device. Rainwater that exceeds the drainage capacity enters the road rainwater pipe through the overflow port at the upper end of the diversion box. The water storage space in the filtration and purification device can be adjusted according to the required water volume, and the type and depth of the filter medium can also be selected in a targeted manner according to the pollutant characteristics and pollutant concentration of different roads. It can solve the problem of controlling the rainwater runoff volume and runoff pollutants on roads (low green space ratio) and provide more options for landscape design. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The following drawings are only used to enable those skilled in the art to better understand the technical solution of the present invention, and are not intended to limit the present invention. Those skilled in the art can obtain other drawings based on the technical solution of the present invention.

[0024] Figure 1 It is a structural diagram of a road rainwater runoff pollution control and purification system;

[0025] Figure 2 It is a structural schematic diagram of the shunt box;

[0026] Figure 3 This is a schematic diagram of the structure of the first embodiment. Figure 1 ;

[0027] Figure 4 This is a schematic diagram of the structure of the first embodiment. Figure 2 ;

[0028] Figure 5 This is a schematic diagram of the structure of the second embodiment. Figure 1 ;

[0029] Figure 6 This is a schematic diagram of the structure of the second embodiment. Figure 2 ;

[0030] Figure 7 This is a schematic diagram of the structure of the second embodiment. Figure 3 .

[0031] Description of labels:

[0032] 1. Drainage well; 2. Diversion box; 3. Cover plate; 4. Sewage interception basket; 5. Overflow channel; 6. Oil-separating sand well; 7. Drain pipe; 8. Permeable water pipe; 9. Inspection port; 10. Outlet pipe; 11. Sand cushion layer; 12. Gravel layer; 13. Sand filter layer; 14. Water storage module; 15. Permeable geotextile; 16. Permeable drainage pipe; 17. Diversion pipe. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In order to better describe and illustrate the embodiments of the present application, reference may be made to one or more drawings, but the additional details or examples used to describe the drawings should not be considered as limiting the scope of the invention of the present application, any of the currently described embodiments or preferred methods.

[0035] It should be noted that when a component is referred to as being "connected" to another component, it may be directly connected to the other component or there may be a central component. When a component is referred to as being "disposed on" another component, it may be directly disposed on the other component or there may be a central component at the same time.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0037] like Figure 1 , Figure 2 As an embodiment of the present invention, a road rainwater runoff pollution control and purification system includes:

[0038] Drainage well 1;

[0039] A diversion box 2, wherein the diversion box 2 is arranged in the drainage well 1 to receive rainwater flowing into the drainage well 1;

[0040] The oil-separating and grit-separating well 6, the diversion box 2 transports rainwater to the oil-separating and grit-separating well 6 through the drainage pipe 7 for oil-separating and grit-separating treatment;

[0041] The filtering and purifying device filters the rainwater in the oil separation and sand settling well 6.

[0042] The rainwater from the motor vehicle or non-motor vehicle lane flows into the diversion box 2, which can first separate the larger debris in the rainwater. The diversion box 2 transports the rainwater to the oil-separation and sand-separation well 6 through the drainage pipe 7 for oil separation and sedimentation, and then filters the rainwater in the oil-separation and sand-separation well 6 through a filtering and purification device.

[0043] Generally, rainwater on roads has an initial scouring effect, and the water quality of rainwater runoff in the initial stage of rainfall is poor. Therefore, this part of rainwater is diverted to facilities in non-road isolation zones or tree belts for purification and treatment.

[0044] The drainage well 1 is arranged on one side of the road, and a green belt or a sidewalk is arranged on the same side of the road. The oil separation and sand settling well 6 is located below the green belt or the sidewalk, and the filtering and purification device is also located below the green belt or the sidewalk.

[0045] A cleaning port is provided at the top of the oil-separation and sand-setting well 6, so that the sundries in the oil-separation and sand-setting well 6 can be cleaned.

[0046] Without changing the external landscape effect, it can also control the road rainwater runoff volume and runoff water quality.

[0047] In another embodiment, if Figure 1 , Figure 2 The diversion box 2 is installed at the water inlet of the drainage well 1. The top of the diversion box 2 is open and a cover plate 3 with a grille is installed at the opening.

[0048] The diversion box 2 is installed at the water inlet of the drainage well 1, which can make the diversion box 2 more convenient to receive rainwater flowing into the drainage well 1. When the rainwater passes through the cover plate 3 with a grid, large debris mixed in the rainwater will be isolated to prevent the large debris from entering the diversion box 2.

[0049] The bottom level of the diverter box 2 is higher than or equal to the level of the middle of the oil-separating and sand-setting well 6 .

[0050] The cover plate 3 can be hinged or placed on the diversion box 2, which can facilitate opening of the cover plate 3.

[0051] In another embodiment, if Figure 1 , Figure 2 A sewage interception basket 4 is provided in the diversion box 2 , and the sewage interception basket 4 is installed at the opening of the diversion box 2 and is placed below the cover plate 3 .

[0052] The rainwater flowing into the diversion box 2 is filtered, and the debris is intercepted by the dirt interception basket 4 to prevent larger debris from entering the oil separation and sand settling well 6.

[0053] The sewage interception basket 4 can be hinged or placed on the diversion box 2, which can facilitate the removal of debris in the sewage interception basket 4.

[0054] In another embodiment, if Figure 1 , Figure 2 An overflow channel 5 communicating with the drainage well 1 is provided on the side wall of the diversion box 2 , and the level of the overflow channel 5 is higher than the level of the water inlet of the drainage pipe 7 .

[0055] When the rainfall is heavy, it overflows into the drainage well 1 through the overflow channel 5 and finally collects into the road rainwater drainage pipe 7 network system.

[0056] In another embodiment, if Figure 1 , Figure 2 The water inlet of the drainage pipe 7 is connected to the diversion box 2, and the water outlet is connected to the upper part of the oil-separating sand settling well 6. The horizontal height of the water inlet of the drainage pipe 7 is higher than the horizontal height of the water outlet of the drainage pipe 7.

[0057] It can enable rainwater in the diversion box 2 to enter the oil-separation and sand-setting well 6 through the drain pipe 7. The water inlet level of the drain pipe 7 is higher than the water outlet level of the drain pipe 7, so that the rainwater in the diversion box 2 quickly flows into the oil-separation and sand-setting well 6.

[0058] In another embodiment, if Figure 1 , Figure 2 A guide pipe 17 coaxially arranged with the oil-separation and sand-trapping well 6 is installed in the oil-separation and sand-trapping well 6, and the outer diameter of the guide pipe 17 is smaller than the inner diameter of the oil-separation and sand-trapping well 6. The bottom horizontal height of the guide pipe 17 is higher than the bottom horizontal height of the oil-separation and sand-trapping well 6, and the upper horizontal height of the guide pipe 17 is higher than the outlet horizontal height of the drain pipe 7.

[0059] The diversion pipe 17 plays the role of diverting rainwater. Under the action of the diversion pipe 17, heavy debris such as sand, silt, garbage and other heavy debris in the rainwater will settle at the bottom of the oil-separating and sand-separating well 6, which can quickly separate and precipitate sand, silt, garbage, road oil and other objects in the rainwater in the oil-separating and sand-separating well.

[0060] The upper end of the flow guide pipe 17 is fixedly mounted on the side wall of the oil separation and sand settling well 6 through a fixing rod.

[0061] The oil-separating sand well 6 is a hydraulic cyclone sand well or other inspection well with pretreatment function. Sand in rainwater, silt garbage, road oil and other objects are separated and precipitated in the oil-separating sand well, which is convenient for cleaning and keeps the pipeline unobstructed.

[0062] Embodiment 1

[0063] like Figure 3 , Figure 4 The filtering and purification device includes a sand cushion layer 11 and a gravel layer 12 arranged from bottom to top, and a permeable water distribution pipe 8 is laid in the gravel layer 12. One end of the permeable water distribution pipe 8 is connected to the upper part of the oil-separating and sand-trapping well 6, and the other end extends out of the gravel layer 12, and the port extending out of the gravel layer 12 is an inspection port 9; the horizontal height of the connection between the permeable water distribution pipe 8 and the oil-separating and sand-trapping well 6 is lower than the horizontal height of the water outlet of the drain pipe 7.

[0064] Generally, rainwater on roads has an initial scouring effect, and the water quality of rainwater runoff in the initial stage of rainfall is poor, so this part of rainwater needs to be purified; the rainwater runoff from motor vehicle or non-motor vehicle lanes flows into the diversion box 2, and the initial rainwater first enters the oil-separating sand settling well 6 for pretreatment to precipitate particulate matter and intercept oil pollution, and then the water is distributed to the area where the gravel layer 12 and the sand cushion layer 11 are replaced through the infiltration water distribution pipe 8. After the water is filtered and purified through the stone layer and the sand cushion layer 11, it infiltrates into the lower soil.

[0065] The type of filler in the gravel layer 12 can be adjusted according to the characteristics of pollutants in the influent water.

[0066] There are two groups of infiltration water distribution pipes 8 . When the infiltration water distribution pipes 8 extend out of the gravel layer 12 , they bend 135 degrees and extend obliquely upward out of the gravel layer 12 .

[0067] The width of non-isolation belts / tree belts on some urban roads is relatively narrow. In addition, for landscaping reasons, some roads cannot adopt the method of surface depression. In this case, if the road rainwater runoff volume and runoff water quality need to be controlled, this embodiment can be used.

[0068] When one end of the permeable water distribution pipe 8 is connected to the upper part of the oil-separation and sand-separation well 6 , the horizontal height of the connection end of the permeable water distribution pipe 8 and the oil-separation and sand-separation well 6 is higher than the bottom of the oil-separation and sand-separation well 6 .

[0069] One end of the permeable water distribution pipe 8 is connected to the upper part of the oil-separating sand settling well 6, and the other end extends out of the gravel layer 12, and the port extending out of the gravel layer 12 is the inspection port 9. When there is soil above the gravel layer 12, the permeable water distribution pipe 8 will extend out of the soil, and the inspection port 9 can be used to inspect and backwash the facility.

[0070] Embodiment 2

[0071] like Figure 5 , Figure 6 , Figure 7 The filtering and purification device includes a gravel layer 12, a sand filter layer 13 and a water storage module 14 arranged from bottom to top. The water storage module 14 is connected to the upper part of the oil-separation and sand-trapping well 6 with an outlet pipe 10. The horizontal height of the connection between the outlet pipe 10 and the oil-separation and sand-trapping well 6 is lower than the horizontal height of the water outlet of the drain pipe 7.

[0072] Generally, rainwater on roads has an initial scouring effect, and the water quality of rainwater runoff in the initial stage of rainfall is poor, so this part of rainwater needs to be purified; rainwater runoff from motor vehicle or non-motor vehicle lanes flows into the diversion box 2, and the initial rainwater first enters the oil-separating sand settling well 6 for pretreatment to precipitate the particulate matter, and then the water is led to the water storage module 14 through the outlet pipe 10 for storage, and then slowly filtered and purified through the sand filter layer 13 to the gravel layer 12 in the collection area.

[0073] The water outlet pipes 10 are provided with two groups, which can speed up the water outlet and play a role in rapid filtering and purification.

[0074] Some branch roads in the city have basically no green space, and ordinary rainwater runoff control methods cannot be used. In this case, if the water quality of road rainwater runoff needs to be controlled and reduced, this embodiment can be used.

[0075] The horizontal height of the connection end between the water outlet pipe 10 and the oil-separation and sand-separation well 6 is higher than the bottom of the oil-separation and sand-separation well 6 .

[0076] The rainwater storage module 14 is a device that can be used to store water.

[0077] The thickness and filter material type of the sand filter layer 13 can be adjusted according to the characteristics and concentration of pollutants in the influent water.

[0078] In another embodiment, if Figure 5 , Figure 6 , Figure 7 A permeable drainage pipe 16 is laid in the gravel layer 12, and one end of the permeable drainage pipe 16 extends out of the gravel layer 12 and is connected to the drainage well 1.

[0079] The outlet pipe 10 leads the water to the water storage module 14 for treatment, and then slowly infiltrates and purifies it through the sand filter layer 13 to the gravel layer 12 in the water collection area, and is collected through the infiltration drainage pipe 16 and discharged back to the road rainwater drainage system.

[0080] In another embodiment, if Figure 6 The top of the water storage module 14 is covered with a permeable geotextile 15.

[0081] It can isolate the water storage module 14. Geotextile needs to be added to the upper layer of the water storage module 14 to prevent sand and other waste from entering the water storage module 14, but at the same time allow rainwater to penetrate into the soil.

[0082] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0083] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A road rainwater runoff pollution control and purification system, characterized by: include Drainage wells; A diverter box, which is arranged in the drainage well to receive rainwater flowing into the drainage well; an overflow channel communicating with the drainage well is arranged on the side wall of the diverter box; The oil-separating and sand-separating well, the diversion box transports rainwater to the oil-separating and sand-separating well through a drainage pipe for oil-separating and sand-separating treatment; Filtration and purification device to filter rainwater in the oil-separation and sand-separation well; The diversion box is installed at the water inlet of the drainage well, the top of the diversion box is open and a cover plate with a grille is installed at the opening; a sewage interception basket is provided in the diversion box, and the sewage interception basket is installed at the opening of the diversion box and placed below the cover plate; The filtering and purifying device comprises a gravel layer, a sand filter layer and a water storage module arranged from bottom to top. The water storage module is connected to the upper part of the oil-separating and sand-separating well by a water outlet pipe. The initial rainwater first enters the oil-separating and sand-separating well for pretreatment, and then the water is led to the water storage module through the water outlet pipe for storage, and then slowly filtered and purified through the sand filter layer to the gravel layer in the water collection area; two groups of water outlet pipes are provided; the horizontal height of the connection between the water outlet pipe and the oil-separating and sand-separating well is lower than the horizontal height of the water outlet of the drainage pipe; An infiltration drainage pipe is laid in the gravel layer, and one end of the infiltration drainage pipe extends out of the gravel layer and is connected to the drainage well; the outlet pipe leads the water to the water storage module for treatment, and then the water is slowly filtered and purified through the sand filter layer to the gravel layer in the water collection area, and then collected through the infiltration drainage pipe and discharged back to the road rainwater drainage system.

2. The road rainwater runoff pollution control and purification system according to claim 1 is characterized in that: The level of the overflow channel is higher than the level of the water inlet of the drain pipe.

3. The road rainwater runoff pollution control and purification system according to claim 2 is characterized in that: The water inlet of the drainage pipe is connected to the diversion box, the water outlet is connected to the upper part of the oil-separating and sand-setting well, and the horizontal height of the water inlet of the drainage pipe is higher than the horizontal height of the water outlet of the drainage pipe.

4. The road rainwater runoff pollution control and purification system according to any one of claims 1 to 3, characterized in that: A guide pipe coaxially arranged with the oil-separation and sand-trapping well is installed in the oil-separation and sand-trapping well, and the outer diameter of the guide pipe is smaller than the inner diameter of the oil-separation and sand-trapping well. The bottom horizontal height of the guide pipe is higher than the bottom horizontal height of the oil-separation and sand-trapping well, and the upper horizontal height of the guide pipe is higher than the outlet horizontal height of the drain pipe.

5. The road rainwater runoff pollution control and purification system according to claim 3 is characterized in that: The filtering and purification device includes a sand cushion layer and a gravel layer arranged from bottom to top, a permeable water distribution pipe is laid in the gravel layer, one end of the permeable water distribution pipe is connected to the upper part of the oil-separation and sand-trapping well, and the other end extends out of the gravel layer, and the port extending out of the gravel layer is an inspection port, and the horizontal height of the connection between the permeable water distribution pipe and the oil-separation and sand-trapping well is lower than the horizontal height of the water outlet of the drain pipe.

6. The road rainwater runoff pollution control and purification system according to claim 1 is characterized in that: The top of the water storage module is covered with a permeable geotextile.

Images