CN215483388U - First rain clean system - Google Patents

Abstract

The utility model relates to the technical field of urban non-point source pollution treatment, and provides a primary rain purification system, wherein an existing drainage open trench/cover trench of a city is utilized, and a sediment well and a primary rain purification well which are mutually communicated are arranged at the bottom of the trench, so that the problems that existing primary rain purification facilities such as a primary rain storage pond, an intelligent drainage well and the like have large land and are difficult to implement are solved, and the construction cost is greatly reduced; the top of the sediment well is provided with a first filter screen, and thicker and larger impurities in the primary rain are removed through sediment and filtering effects of the sediment well; first rain purification well top sets up sealed well lid, and rain purification tube is just set up to well inside, and rain purification tube intussuseption is filled with first rain purification material just, and the further purification of rain is realized just through effects such as absorption, the microbial degradation of first rain purification material, and the rain infiltration stratum of purifying the back just, coarse sand stratum realizes further deep purification to the purifying capacity of quality of water among the make full use of, greatly reduced the engineering implementation cost when rain is just purified to high efficiency.

Description

First rain clean system

Technical Field

The utility model relates to the technical field of urban non-point source pollution treatment, in particular to a primary rain purification system.

Background

At present, a large amount of urban non-point source pollutants are carried by rainwater to enter a river water body, so that the serious pollution of the water quality of the river is caused, and the rainfall runoff pollution becomes the second largest non-point source pollution which is only second to agricultural non-point source pollution. The existing various sponge urban ecological measures still have certain disadvantages, such as the traditional grass planting ditch mainly aims at natural water seepage, and runoff reduction is limited; the traditional small ecological wetland is mainly arranged in a flat and open area or a small area, so that water quality deterioration, mosquito breeding and regional environment influence are easily caused; although the rain garden has good landscape effect, the rain garden is limited by urban land and is difficult to popularize in a large range; the primary rain storage tank is also severely limited by urban land resources and is difficult to be widely applied; the intelligent abandoning well has high construction cost and high maintenance cost, and the COD and BOD values of the sewage system can be reduced after the intelligent abandoning well abandons the sewage system, so that the intelligent abandoning well is not beneficial to sewage treatment plants to treat sewage, and the cost of sewage treatment is greatly increased. Therefore, it is necessary to develop a primary rain purification system with small floor space and low cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a primary rain purification system, and aims to solve the technical problems that the primary rain purification system is complex, large in occupied area and high in construction cost in the prior art.

In order to solve the above technical problem, the present invention provides an initial rain purification system, including:

the sediment well is arranged at the bottom of the drainage open ditch or the cover plate ditch, and a first filter screen is arranged at the top of the sediment well;

first rain purification well lays the bottom of drainage open drain or apron ditch, and is located sediment well one side, first rain purification well top sets up sealed well lid, first rain purification well inside coaxial setting first rain purification pipe, first rain purification pipe intussuseption is filled with at least one first rain purification material, first rain purification bottom of the tube sets up first infiltration hole, sediment well with through the overflow pipe intercommunication between the first rain purification well, first rain converge to in drainage open drain or the apron ditch, process the sediment well filters the back, passes through the overflow pipe gets into purify in the first rain purification well, and first rain after the purification passes through first infiltration hole infiltration stratum.

Furthermore, a sediment barrel for filtering coarse-grained impurities is arranged inside the sediment well, and a second water seepage hole is formed in the bottom of the sediment barrel.

Further, a second filter screen is arranged at the bottom of the sediment well, and the aperture of the second filter screen is smaller than that of the first filter screen.

Further, a third filter screen is arranged at the pipe opening of the overflow pipe.

Furthermore, the system also comprises a drainage blind pipe, wherein the drainage blind pipe is laid in the stratum and used for accelerating the drainage speed of the primary rain purification well.

Further, the depth range of the initial rain purification well is 4-10 m.

Furthermore, a first water plugging rubber ring is arranged between the well wall of the primary rain purification well and the pipe wall of the primary rain purification pipe.

Further, a second water plugging rubber ring is arranged between the well wall of the sediment well and the barrel wall of the sediment barrel.

Furthermore, the sediment barrel, the second filter screen and the third filter screen are all coated with geotextile.

Further, the primary rain purification material is coated with geotextile.

The primary rain purification system provided by the utility model has the beneficial effects that: compared with the prior art, the initial rain purification system provided by the utility model utilizes the existing urban drainage open ditches/cover plate ditches or newly builds drainage open ditches/cover plate ditches at proper positions, and the mutually communicated sediment well and the initial rain purification well are arranged at the bottom of the ditches, so that the problems that the existing initial rain purification facilities such as an initial rain regulation pool and an intelligent drainage well are large in land and difficult to implement are solved, and the construction cost is greatly reduced; the top of the sediment well is provided with a first filter screen, and thicker and larger impurities in the primary rain are removed through sediment and filtering effects of the sediment well; first rain purification well top sets up sealed well lid, rain purifying tube is just set up to the coaxial inside of well, rain purifying tube intussuseption is filled with at least one first rain purifying material just, through first rain purifying material's absorption, the further purification of first rain has been realized to effects such as microbial degradation, first rain after the purification permeates the stratum through the first infiltration hole of rain purifying tube bottom just, coarse sand stratum is to the purifying power of quality of water among the make full use of, to just rain realization further deep purification, greatly reduced engineering implementation cost.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that are needed in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:

FIG. 1 is a schematic view of an initial rain purification system according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of an embodiment of an initial rain purification system;

FIG. 3 is a schematic view of the configuration of the sediment trap of FIG. 1;

FIG. 4 is a top view of the sediment trap structure of FIG. 3;

FIG. 5 is a top view of the primary rain purification well structure of FIG. 2;

FIG. 6 is a schematic view of the primary rain purification tube of FIG. 5;

figure 7 is a schematic view of the structure of an overflow tube in one embodiment.

Description of reference numerals:

1. a drainage open ditch or a cover plate ditch; 2. a sediment well; 21. a first filter screen; 22. a slag settling barrel; 23. a second filter screen; 24. a second water plugging rubber ring; 3. a primary rain purification well; 31. sealing the well cover; 32. a primary rain purification pipe; 33. a primary rain purification material; 34. a first water seepage hole; 35. a first water plugging rubber ring; 4. an overflow pipe; 41. a third filter screen; 5. a first earth formation; 6. a second earth formation; 7. a third earth formation; 8. and (4) a drainage blind pipe.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "vertical", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

In the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "connected," "communicating," and the like are to be construed broadly, e.g., as meaning mechanically or electrically connected; the connection may be direct, indirect or internal, or may be a connection between two elements or an interaction relationship between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Preferred embodiments of the present invention are described below with reference to the accompanying drawings:

the initial rain purification system can be applied to the scenes of initial rain purification treatment, urban non-point source pollution treatment, sponge city construction, urban waterlogging treatment and the like. Aiming at the problems of non-point source pollution on two sides of an urban river and serious initial rain runoff pollution, the initial rain purification system can be implemented by checking geological survey data or discovering that medium-coarse sand strata (the permeability coefficient K is more than 0.006cm/s and the medium-coarse sand strata exist on two sides of the river) exist in the range of buried depth of 10 meters through geological drilling, and utilizing the existing open drainage ditch/cover plate ditch or newly building open drainage ditch/cover plate ditch and then utilizing natural relatively permeable strata (generally medium-coarse sand strata).

As shown in fig. 1 and fig. 2, in this embodiment, the primary rain purification system includes a composite vertical adsorption well, the composite vertical adsorption well includes a sediment well 2 and a primary rain purification well 3, the sediment well 2 and the primary rain purification well 3 are adjacently disposed at the bottom of the drainage open ditch or the cover plate ditch 1, and the sediment well 2 and the primary rain purification well 3 are communicated through an overflow pipe 4. Preferably, the sediment well 2 is made of PVC pipe and buried 1 m deep; a first filter screen 21 is arranged at the opening at the top of the sediment well 2, the first filter screen 21 seals the well mouth of the sediment well 2 and is used for filtering large impurity garbage in the primary rain, and preferably, the first filter screen 21 is a stainless steel piece; a sealing well cover 31 is arranged at an opening at the top of the primary rain purification well 3, and rainwater cannot flow into the primary rain purification well 3 from the sealing well cover 31; first rain purification well 3 is inside coaxial setting first rain purification tube 32, and first rain purification tube 32 intussuseption is filled with at least one first rain purification material 33, and first infiltration hole 34 has been seted up to first rain purification tube 32 bottom, and first infiltration hole 34 has also been seted up to the bottom of first rain purification well 3.

Optionally, in this embodiment, the primary rain purification well 3 is a steel pipe (sprayed with an anti-rust layer), the burial depth is determined according to the burial depth of the medium-coarse sand stratum, the primary rain purification pipe 32 is a PVC pipe, the primary rain purification material 33 filled in the primary rain purification pipe 32 may be one type, or may be alternately filled with a plurality of types of purification materials, the primary rain purification material 33 may be an active adsorption material or a microorganism carrier material, such as zeolite and active carbon material which are alternately filled, or may be a single zeolite material or a single active carbon material, and different purification materials may be selectively filled according to actual needs, so as to achieve the optimal purification effect on the primary rain. The specific type and filling manner of the primary rain purification material 33 are not particularly limited.

Specifically, as shown in fig. 2 and fig. 6, the first water seepage holes 34 formed in the bottom ends of the first rain purification well 3 and the first rain purification pipe 32 enable the first rain purification well 3 to be communicated with a relatively water permeable stratum (medium coarse sand stratum), the forming ranges of the first water seepage holes 34 on the first rain purification well 3 and the first rain purification pipe 32 are matched with the buried depth range of the relatively water permeable stratum (medium coarse sand stratum), the first water seepage holes 34 can be formed in the well wall and the well bottom of the first rain purification well 3 and the pipe wall and the pipe bottom of the first rain purification pipe 32, and the diameter range of the first water seepage holes 34 can be selected to be 4-10 mm.

Specifically, the formation may be divided into a first formation 5 (with a permeability coefficient of K1), a second formation 6 (with a permeability coefficient of K2), and a third formation 7 (with a permeability coefficient of K3) from top to bottom according to differences in permeability coefficients of the formation, where K1 < K2 < K3. Preferably, the sediment well 2 is buried in the first stratum 5, and the first rain purification well 3 is buried in the third stratum 7 from the first stratum 5 and the second stratum 6. And discharging the purified primary rain into the urban water body through the third stratum 7 by utilizing the natural characteristic of the third stratum 7 with larger permeability coefficient.

As shown in fig. 1 and 2, the direction indicated by the arrow in the figure is the water flow direction, and the process of purifying the primary rain is as follows: the initial rain converges to the open drain or the cover plate ditch 1, firstly enters the sediment well 2 through the first filter screen 21, the liquid level in the sediment well 2 rises to exceed the bottom of the overflow pipe 4, and then overflows through the pipe orifice of the overflow pipe 4 to enter the initial rain purification well 3, the initial rain purification material 33 in the initial rain purification pipe 32 plays a purification role, the initial rain purified by the initial rain purification material 33 permeates into the third stratum 7 through the first water seepage hole 34, the initial rain is further and deeply purified by the medium-coarse sand layer, and the initial rain is effectively ensured to enter the urban water body or other earth surfaces and underground water bodies after being purified to reach the standard of water quality.

The initial rain purification system of the embodiment utilizes the existing urban drainage open ditches/cover plate ditches or newly establishes drainage open ditches/cover plate ditches at proper positions, and the sediment well 2 and the initial rain purification well 3 which are mutually communicated are arranged at the bottom of the ditches, so that the problems that the existing initial rain purification facilities such as an initial rain regulation pool, an intelligent drainage well and the like have large land and are difficult to implement are solved, and meanwhile, the construction cost is greatly reduced; removing thicker and larger impurities in the primary rain through the sediment and filtering action of the sediment well 2; the further purification of the first rain is realized through the adsorption of the first rain purification material 33, the microbial degradation and other effects, the purified first rain permeates the stratum through the first rain purification well 3 and the first water seepage hole 34 at the bottom end of the first rain purification pipe 32, the purification capacity of the medium-coarse sand stratum to the water quality is fully utilized, the further deep purification of the first rain is realized, the first rain is ensured to be purified to reach the standard and then enter the urban water body, the natural favorable condition is utilized to implement the first rain purification system, and the engineering implementation cost is greatly reduced.

As shown in fig. 1, 2 and 3, in the present embodiment, a sediment tank 22 for filtering coarse impurities is disposed inside the sediment well 2, and a second water seepage hole (not shown) is disposed at the bottom of the sediment tank 22.

Specifically, in the present embodiment, the sediment tank 22 may be made of plastic, and of course, the sediment tank 22 may be made of other materials, and the specific material of the sediment tank 22 is not limited herein. The bottom of the slag settling barrel 22 is provided with second water seepage holes, preferably water seepage holes which are uniformly arranged at intervals, and the diameter range of the second water seepage holes can be selected to be 1-2 mm. Sediment bucket 22 and sediment well 2 are preferred coaxial setting, set up sediment bucket 22 mainly used for filtering deposit thicker impurity, can regularly take out sediment bucket 22 from sediment well 2 and clear up convenient and fast. The depth of the slag settling tank 22 preferably corresponds to the height of the overflow pipe 4. Sediment bucket 22 set up on the one hand and realized the sediment filtration to coarse grain impurity, be convenient for carry out periodic cleaning to sediment well 2, on the other hand can slow down the speed that rain purification material 33 was blockked up by the particulate matter that rain carried in the rain purification pipe 32 just for the first time to ensure purifying effect.

Preferably, in order to avoid that part of coarse-grained impurities directly enter the first stratum 5 from flowing out of the second seepage holes, the second seepage holes at the bottom of the sediment barrel 22 are wrapped by geotextile, so that most of the primary rain is ensured to enter the primary rain purification well 3 in the sediment well 2 through the overflow pipe 4, and the purification effect of the primary rain is ensured.

As shown in fig. 3, in this embodiment, a second filter 23 is disposed at the bottom of the sediment well 2, and the aperture of the second filter 23 is smaller than that of the first filter 21.

Specifically, the second filter screen 23 is made of stainless steel materials which can be selected like the first filter screen 21, the second filter screen 23 is arranged at the bottom of the sediment well 2 and used for bottom sealing, the water filtering capacity of the second filter screen is low, only a small amount of first rain directly enters the first stratum 5 after being filtered by the second filter screen 23 when the first rain is normally purified, and most of the first rain enters the first rain purification well 3 through the overflow pipe 4 in the sediment well 2. The second filter screen 23 is mainly arranged to enable accumulated water in the sediment well 2 to be slowly drained or evaporated after rain.

Preferably, in order to further reduce the water filtering capacity of the second screen 23, so that most of the primary rain enters the primary rain purification well 3 through the overflow pipe 4 during the purification process, the second screen 23 is also covered with geotextile.

In this embodiment, the mouth of the overflow pipe 4 is provided with a third sieve 41, as shown in figure 7.

Specifically, in order to reduce the coarse-grained impurity and enter into first rain purification well 3, slow down the speed that first rain purification material 33 was blockked up by the particulate matter that first rain carried in first rain purification pipe 32, ensure purifying effect, set up third filter screen 41 in the mouth of pipe department at the both ends of overflow pipe 4, third filter screen 41 is the optional stainless steel material.

Preferably, to further reduce the entry of coarse impurities into the primary rain purification well 3, the third screen 41 is also covered with geotextile. After the primary rain is filtered by the geotextile at the opening of the overflow pipe 4 and the third filter screen 41, the primary rain overflows into the primary rain purification well 3 for further purification treatment.

As shown in fig. 1 and fig. 2, in this embodiment, the primary rain purification system further includes a drainage blind pipe 8, and the drainage blind pipe 8 is laid in the ground layer to accelerate the drainage speed of the primary rain purification well 3.

Specifically, when the permeability coefficient of the medium coarse sand layer is low, the drainage blind pipe 8 can be arranged for accelerating the flow rate of the groundwater in the medium coarse sand layer, and the drainage blind pipe 8 is usually laid at the position at the downstream of the primary rain purification well 3 and near the top in the medium coarse sand layer for accelerating the flow rate of the groundwater in the medium coarse sand layer, so that the influence on the service performance due to too long storage time of the primary rain in the primary rain purification well 3 is avoided; if the formation permeability coefficient is more than 0.024cm/s, the drainage blind pipe 8 is not laid generally. The drainage blind pipe 8 is used as an auxiliary drainage facility, and is used for assisting in draining water of a permeable stratum when the permeability coefficient of the target permeable stratum is relatively low and draining the water to a river channel, so that the mobility of water in the primary rain purification well 3 is accelerated, and the drainage blind pipe 8 can be arranged at any position of the target permeable stratum, which can be communicated with the river channel. Preferably, the drainage blind pipe 8 is wrapped by geotextile.

Preferably, in the present embodiment, the depth of the initial rain purification well 3 is in the range of 4-10 meters. The burial depth range of the primary rain purification well 3 depends on the burial depth of the medium-coarse sand stratum. Since the medium-coarse sand stratum is found in the range of the burial depth of 10 meters through surveying the geological survey data or geological drilling, the arrangement depth range of the primary rain purification well 3 is 4-10 meters. Of course, the depth range of the initial rain purification well 3 may be other depth ranges according to specific geographical characteristics.

As shown in fig. 2 and 5, in this embodiment, a first water-blocking rubber ring 35 is disposed between the well wall of the primary rain purification well 3 and the pipe wall of the primary rain purification pipe 32.

Specifically, because there is the gap between the wall of a well of first rain purification well 3 and the pipe wall of first rain purification pipe 32, in order to prevent that the water that overflows to in first rain purification well 3 can not directly flow to the medium-coarse sand stratum from the gap between the wall of a well of first rain purification well 3 and the pipe wall of first rain purification pipe 32, set up first water blocking rubber circle 35 between the wall of a well of first rain purification well 3 and the pipe wall of first rain purification pipe 32 and be used for sealing up above-mentioned gap.

As shown in fig. 2, 3 and 4, similar to the first water blocking rubber ring 35, since there is a gap between the wall of the sediment well 2 and the wall of the sediment tank 22, in order to prevent the first rain entering the sediment well 2 from directly entering the first stratum 5 from the gap between the wall of the sediment well 2 and the wall of the sediment tank 22, the first rain cannot be filtered and deposited, or the coarse impurities in the first rain enter the gap to block the second filter screen 23 at the bottom of the sediment well 2, the second water blocking rubber ring 24 is provided between the wall of the sediment well 2 and the wall of the sediment tank 22 to seal the gap.

Preferably, in this embodiment, the initial rain purification material 33 is coated with geotextile. In order to prevent the particles of the first rain purification material 33 from flowing and blocking the first water seepage holes 34 under the washing of the first rain, the first rain purification material 33 is wrapped by geotextile, and if a plurality of first rain purification materials 33 are alternately filled in sections, each first rain purification material 33 is wrapped by geotextile. The geotextile can play a certain role in filtering and purifying while fixing the particles of the initial rain purification material 33.

According to the initial rain purification system, the existing open drainage ditches/cover plate ditches at two banks of the urban river or newly-built open drainage ditches/cover plate ditches at proper positions are utilized, and the sediment well 2 and the initial rain purification well 3 are arranged at the bottom of the ditches, so that the problems that initial rain purification facilities such as an initial rain regulation pool, an intelligent drainage well and the like are large in land and difficult to implement are solved, and meanwhile, the construction cost is greatly reduced; by using the sediment and filtering effects of the sediment well 2, the biodegradation effect of microorganisms propagated on zeolite in the primary rain purification well 3 and the adsorption effect of activated carbon, urban non-point source pollution is collected and purified in sunny days, primary rain water is mainly collected and purified in rainy days, non-point source pollution and primary rain pollution of urban rivers and lakes are effectively reduced, and the water quality of urban water is boosted and maintained; the purification capacity and the overflowing capacity of the coarse sand stratum in the two banks of the river channel, which are natural resources, on water quality are fully utilized, the implementation cost of the primary rain purification project is greatly reduced, and the possibility is provided for the popularization of the primary rain purification project.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A primary rain purification system, comprising:

the sediment well is arranged at the bottom of the drainage open ditch or the cover plate ditch, and a first filter screen is arranged at the top of the sediment well;

first rain purification well lays the bottom of drainage open drain or apron ditch, and is located sediment well one side, first rain purification well top sets up sealed well lid, first rain purification well inside coaxial setting first rain purification pipe, first rain purification pipe intussuseption is filled with at least one first rain purification material, first rain purification bottom of the tube sets up first infiltration hole, sediment well with through the overflow pipe intercommunication between the first rain purification well, first rain converge to in drainage open drain or the apron ditch, process the sediment well filters the back, passes through the overflow pipe gets into purify in the first rain purification well, and first rain after the purification passes through first infiltration hole infiltration stratum.

2. The primary rain purification system according to claim 1, wherein a sediment barrel for filtering coarse impurities is arranged inside the sediment well, and a second water seepage hole is formed in the bottom of the sediment barrel.

3. The primary rain purification system of claim 2, wherein a second screen is provided at the bottom of the sediment well, and the second screen has a smaller pore size than the first screen.

4. The primary rain purification system of claim 3, wherein the mouth of the overflow tube is provided with a third screen.

5. The primary rain purification system of any one of claims 1 to 4, further comprising drainage blind pipes laid in the ground for increasing the drainage rate of the primary rain purification well.

6. The primary rain purification system of claim 1, wherein the primary rain purification well is deployed to a depth in the range of 4-10 meters.

7. The primary rain purification system of claim 1, wherein a first water-blocking rubber ring is arranged between the well wall of the primary rain purification well and the pipe wall of the primary rain purification pipe.

8. The primary rain purification system of claim 2, wherein a second water-blocking rubber ring is arranged between the wall of the sediment well and the wall of the sediment barrel.

9. The primary rain purification system of claim 4, wherein the sediment tank, the second screen, and the third screen are all coated with geotextile.

10. The primary rain purification system of any one of claims 1 to 4, wherein the primary rain purification material is coated with a geotextile.

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