CN110130469A - A kind of environment-friendly multi-stage filtering inlet for stom water integrated apparatus - Google Patents

Abstract

The invention discloses an environment-friendly integrated device for multi-stage filtering of rainwater outlets, which belongs to the technical field of rainwater purification and comprises a water tank with a drain outlet. The bottom of the water tank has a certain slope. Pull-type cover plate, the rainwater grate has an overflowable sewage interception hanging basket, and a multi-stage filter is installed inside the device. The main body of the multi-stage filter is composed of six different porous permeable nets. The porous permeable net From left to right, every two adjacent blocks constitute a first-stage filter, and there are three stages in total. The apertures of the permeable holes on each stage of the permeable net are the same and decrease step by step. Different types of filter media. The present invention can carry out stage-by-stage filtration treatment on the initial rainwater with a high degree of pollution, and can overflow the upper part of the multi-stage filter for the cleaner late rainwater, and finally flow into the municipal rainwater pipe network through the drain port to realize the purification of the initial rainwater. Avoid pollution of receiving water bodies.

Description

An environment-friendly multi-stage filter rainwater outlet integrated device

technical field

The invention relates to a gully, in particular to an environment-friendly integrated device for multi-stage filtering of the gully.

Background technique

Initial rainwater is the main cause of non-point source pollution. The initial rainwater contains a large amount of pollutants such as organic matter, suspended solids, heavy metals, grease and pathogens, and the pollution degree is high, usually exceeding the pollution degree of municipal sewage, and most of the pollutant indicators exceed the standard limit of surface water environmental quality V class, if If it is directly discharged into the receiving water body without treatment, it will cause serious pollution to the receiving water body.

The rainwater outlet is the source of the urban rainwater drainage system. It is usually installed in square catchment areas, intersections, street drainage ditches, street side ditches, etc., to prevent roads or low-lying areas from accumulating water through rapid drainage of rainwater, and avoid causing traffic obstruction or road damage. damage etc. The existing gullies usually only have the function of fast drainage of rainwater, but there is a problem of not having the function of purifying rainwater or having insufficient purification capacity. Rainfall washes a large amount of pollutants on the road surface into the rainwater outlet. If the rainwater outlet cannot effectively intercept the pollutants, it will cause blockage of the pipe network, resulting in water accumulation on the road or pollution of the receiving water body.

At present, primary rainwater treatment is usually carried out by installing primary rainwater disposal facilities, and the primary rainwater is diverted to sewage treatment plants or storage tanks. This will undoubtedly increase construction and treatment costs, while increasing the operating pressure of sewage treatment plants.

Contents of the invention

The technical problem to be solved by the present invention is to provide an environment-friendly integrated multi-stage filter rainwater outlet device that can realize initial rainwater purification without installing initial rainwater discarding equipment, and is anti-clogging, easy to install, easy to maintain and low in cost.

To solve the problems of the technologies described above, the technical solution adopted in the present invention is as follows:

An environment-friendly integrated device for multi-stage filtering of rainwater outlets, including a water tank with a drain outlet, characterized in that: the water tank is covered with a rainwater grate, and an overflowable sewage interception hanging basket is arranged under the rainwater grate. There are at least three stages of filters before the drain in the water tank; each stage of the filter is composed of two porous permeable nets. The pore diameter decreases step by step from the farthest to the closest to the drain. Different types of filter materials are installed between the two permeable nets in the third stage and the particle size decreases step by step. A liquid level adjustment area is set between the three-stage filters.

One end of the opening on the trough is provided with a detachable cover plate, the rainwater grate covered on the sewage intercepting hanging basket is at the other end, and the drain is located at the opposite end covered with the rainwater grate (the end covered with the rainwater grate Down).

The lower part of the overflowable sewage intercepting hanging basket is a screen, and the upper part is provided with an overflow port.

The screen mesh of the overflowable sewage intercepting hanging basket is square or circular, and the overflow port is rectangular.

The water tank is a cuboid structure with a bottom slope of 5%, and the drain is located at the lowest position and connected to the municipal rainwater pipeline.

The porous permeable net is plate-shaped, and the two vertical sides and the bottom are embedded in the grooves on the left and right sides and the bottom of the water tank, and the distance between the permeable net closest to the drain and the drain is 30-50 cm.

The porous permeable net is 0.5m high and 2mm thick. The distance between two permeable nets at the same level is 10-15cm. The aperture of the first-stage permeable hole is 2cm, the aperture of the second-stage permeable hole is 1cm, and the aperture of the third-stage permeable hole is 0.5cm. .

There is a liquid level difference between each stage of the filter to ensure smooth drainage of the multi-stage filter, and the width of the adjustment area is 5-10 cm.

The water tank is made of prefabricated concrete or fiberglass, with a length of 1.5-2m, a width of 0.47-0.5m, and a height of 1m; the diameter of the drain is 0.2m.

Described rainwater grate is cuboid, and material is cast iron, resin or stainless steel.

Described sewage intercepting hanging basket is below the rainwater grate, and material is stainless steel, height 0.2m, screen mesh is square (circle), side length (diameter) 0.5cm, has rectangular overflow port on the peripheral wall of top, 0.1m long and 0.03m wide.

The pullable cover plate is made of cast iron with a pull handle on the top.

The various levels of the filter material are zeolite, ceramsite, quartz sand or other qualified types, and the particle size of each level of filter material is larger than the aperture of the porous water-permeable net, and the filter material is packed in mesh bags.

The beneficial effects of the present invention are: when urban rainwater runoff scours the road surface and carries a large amount of pollutants through the rainwater grate and the sewage interception hanging basket, a sewage interception treatment can be carried out, and large pollutants such as leaves and plastic bags can be separated from the rainwater, and the initial rainwater diameter The flow rate is very small, so the initial rainwater after one filtration has to pass through a multi-stage filter. After filtering with different particle sizes from large to small and different types of filter materials, the initial rainwater is fully purified. When the rainwater runoff gradually increases , the relatively clean rainwater in the middle and late stages will pass through the top of the multi-stage filter, and the rainwater pipe network connected through the outfall can be directly discharged into the receiving water body, avoiding the pollution of the receiving water body, and saving the installation of the initial rain abandonment device , The cost of the sewage pipe network reduces the operating burden and cost of the sewage treatment plant. Moreover, the assembly and disassembly of the device are relatively convenient, the volume is small and the floor area is not large, the filter material can be taken out regularly for cleaning and recycled, the cost is low, and the maintenance is relatively simple.

The environment-friendly multi-stage filter rainwater integration device of the present invention not only has the function of quick drainage of rainwater, but also has the functions of anti-clogging and purification of initial rain.

Description of drawings

Fig. 1 is a schematic cross-sectional view of the overall structure of an embodiment of the present invention;

Fig. 2 a is the schematic cross-sectional view (along the A-A line of Fig. 2 b) of the flat structure of the sewage intercepting hanging basket of the embodiment of the present invention;

Fig. 2b is a schematic top view of the flat structure of the sewage intercepting hanging basket according to the embodiment of the present invention;

Fig. 2c is the flat structure cross-sectional schematic diagram (along the I-I line of Fig. 2b) of the dirt intercepting hanging basket of the embodiment of the present invention;

Figure 3a is a schematic top view of the structure of an embodiment of the present invention;

Fig. 3b is a schematic top view of the upper structure of the embodiment of the present invention without the rainwater grate, the pullable cover plate and the overflowable sewage intercepting hanging basket;

Fig. 3c is a top view schematic diagram of the lower structure of the embodiment of the present invention without the rainwater grate, the pullable cover plate and the overflowable sewage intercepting hanging basket;

Figure 4a is a schematic side view of the structure of an embodiment of the present invention;

Fig. 4b is a schematic cross-sectional view along line 1-1 of Fig. 3a;

Fig. 4c is a schematic cross-sectional view along line 2-2 of Fig. 3a;

Figure 4d is a schematic cross-sectional view along the A-A line of Figure 3a;

Figure 4e is a schematic diagram of the mesh size of the three-stage porous permeable net;

Fig. 5 is the top view diagram of the rainwater grate structure of the embodiment of the present invention;

Fig. 6a is a front view of a liftable cover according to an embodiment of the present invention;

Fig. 6b is a top view of the pullable cover according to the embodiment of the present invention.

Reference signs: 1-rainwater grate, 2-sewage intercepting hanging basket, 21-overflow port, 22-stainless steel screen, 3-passing tank, 4-first-level porous permeable net, 5-second-level porous permeable net, 6-Third-stage porous permeable net, 7-Liquid level adjustment area, 8-Pullable cover plate, 9-Drain outlet, 10-First-stage filter material, 11-Second-stage filter material, 12-Third grade filter.

Detailed ways

The present invention will be described clearly and in detail below in conjunction with specific implementation examples and accompanying drawings.

Referring to Fig. 1 to Fig. 6b, it is an embodiment of an environment-friendly multi-stage filtering rainwater outlet integrated device of the present invention. It comprises a water tank 3 with a drain 9 . The water tank 3 is covered with a rainwater grate 1, and the rainwater grate is provided with an overflow-type sewage intercepting hanging basket 2, and a three-stage filter is arranged before the water outlet in the water tank.

Each stage of the filter is composed of two identical porous permeable nets, and the permeable holes on the two permeable nets at each level have the same aperture diameter. The aperture of the permeable hole decreases step by step from the farthest to the closest to the drain 9, and different types of filter materials are installed between the two permeable nets of the third level: the first level filter material 10, the second level filter material 11 and the third level filter material 12, and the particle size decreases step by step, and a liquid level adjustment zone 7 is set between the three-stage filters. The various levels of the filter material are zeolite, ceramsite, quartz sand or other qualified types, and the particle size of each level of filter material is larger than the aperture of the porous water-permeable net, and the filter material is packed in a mesh bag.

The water tank 3 is a cuboid structure with a bottom slope of 5%. The drain is located at the lowest position and is connected to the municipal rainwater pipeline. The open end of the water tank is provided with a detachable cover plate 8, which covers the dirt intercepting hanging basket. The rainwater grate on the top is at the other end, and the drain is located at the opposite end covered with the rainwater grate (under the end covered with the rainwater grate). The water tank is made of prefabricated concrete or fiberglass, with a length of 1.5-2m, a width of 0.47-0.5m, and a height of 1m; the diameter of the outlet is 0.2m.

The bottom of the overflow type sewage intercepting hanging basket 2 is a screen, and an overflow is provided on the top, the screen mesh is square or circular, and the overflow is a rectangle. The sewage intercepting hanging basket is under the rainwater grate. The material is stainless steel, the height is 0.2m, the screen mesh is square (circular), the side length (diameter) is 0.5cm, and the upper peripheral wall has a rectangular overflow port, the length is 0.1 m, width 0.03m.

The porous permeable net is plate-shaped, and the two vertical sides and the bottom are embedded in the grooves on the left and right sides and the bottom of the water tank, and the distance between the permeable net closest to the drain and the drain is 30-50 cm; the porous permeable net The height is 0.5m, the thickness is 2mm, and the distance between two permeable nets at the same level is 10-15cm. The diameter of the first permeable hole is 2cm, the diameter of the second permeable hole is 1cm, and the diameter of the third permeable hole is 0.5cm.

There is a liquid level difference between each stage of the filter to ensure smooth drainage of the multi-stage filter, and the width of the adjustment area is 5-10 cm.

The rainwater grate is a cuboid made of cast iron, resin or stainless steel; the pullable cover plate is made of cast iron with a pull handle on the top.

In the specific implementation, the urban rainwater runoff passes through the rainwater grate 1 and the sewage interception hanging basket 2 to carry out a sewage interception treatment. The initial rainwater with a high degree of pollution is then filtered through a multi-stage filter for a second treatment, while the relatively clean later rainwater is filtered. The overflow from the upper part of the multi-stage filter can finally be discharged into the receiving water body from the municipal rainwater pipe network connected to the outlet 9 of the device, thereby realizing the purification of the initial rainwater and avoiding the pollution of the receiving water body.

The rainwater grate 1 and the sewage intercepting hanging basket 2 can filter out large-volume pollutants such as leaves and plastic bags in the urban rainwater runoff, avoiding the blockage of the multi-stage filter and the drain 9 inside the device. The sewage intercepting hanging basket 2 is in the The rainwater grate 1 bottom, the two are carried on the flume 3.

As shown in Fig. 2a to Fig. 2c, the upper part of the sewage intercepting hanging basket 2 has an overflow port 21, and the lower part is a stainless steel metal screen 22. In a specific implementation, if the pollutants carried by the rainwater runoff block the screen mesh, the rainwater can overflow from the upper overflow port 21 to keep the drainage unobstructed.

As shown in Fig. 1 and Fig. 4a to Fig. 4c, the three-stage filter is composed of six porous water-permeable nets 4, 5, 6, and the structure is relatively simple. The six porous permeable nets 4, 5, and 6 are from left to right, and every two adjacent blocks are 1 level, a total of 3 levels. The interval between each level is the liquid level adjustment area 7, and the apertures of the porous permeable nets 4, 5, and 6 of the same level Consistent, each level of aperture gradually decreases from left to right. Porous permeable nets 4, 5, 6 are embedded in the left and right sides of the water tank 3 and fixed on the inner wall of the bottom. The filter materials zeolite, ceramsite, quartz sand 10, 11, 12 or other qualified types with different particle sizes are respectively installed between the porous water permeable nets 4, 5, and 6 at all levels.

In the specific implementation, after the rainwater runoff is filtered once by the rainwater grate 1 and the sewage intercepting hanging basket 2, the larger pollutants have been filtered out, and the initial rainwater with a higher degree of pollution will flow down from the multi-stage filter. The permeable nets 4, 5, 6 flow into the pores, because the bottom of the water tank 3 has a certain slope, and there is a liquid level difference in the liquid level adjustment area 7 of each level, the rainwater flows more smoothly, and the initial rainwater passes through the filter material between the levels. 10, 11, 12, filter step by step, most of the SS, COD, TP, TN, heavy metals and other pollutants are adsorbed by the filter materials 10, 11, 12, so that the initial rainwater is fully purified, and the amount of rainwater in the middle and late stages increases , the relatively clean rainwater in the middle and late stages will not pass through the porous water-permeable nets 4, 5, 6, but directly overflows from the top of the multi-stage filter, and is discharged from the drain port 9.

A preferred embodiment of the present invention is: the water tank 3 is a cuboid structure, made of prefabricated concrete or fiberglass, with a length of 1.5-2m, a width of 0.47-0.5m, and a height of 1m. The drain outlet 9 is at the bottom of the water tank 3 and has a diameter of 0.2m.

The preferred embodiment of the present invention is: intercepting sewage hanging basket 2 material is stainless steel, height 0.2m, screen mesh is square, side length 0.5cm, with rectangular overflow 21 on the peripheral wall of the top, long 0.1m, wide 0.03m.

A preferred embodiment of the present invention is: the porous permeable net 4, 5, 6 of the multi-stage filter is a cuboid structure, with a height of 0.5m and a thickness of 2mm, embedded in the left and right sides of the water tank 3 and the inner wall of the bottom, each from left to right Two pieces are one level, a total of three levels. The distance between two permeable nets at the same level is 10-15cm, and the distance between each level is 5-10cm. The permeable holes on the permeable net are square and gradually decrease. The first-level permeable hole diameter is 2cm , the diameter of the second-level permeable hole is 1cm, and the diameter of the third-level permeable hole is 0.5cm.

The preferred embodiment of the present invention is: the upper part of the device is provided with a pullable cover plate 8, and the pullable cover plate 8 is provided with a handle, which is convenient for opening and checking, cleaning and maintaining the internal multi-stage filter.

A preferred embodiment of the present invention is: filter material 10, 11, 12 can be zeolite, ceramsite, quartz sand, is contained by filter material net bag, when filter material 10, 11, 12 adsorption pollutants reach saturation or clogging occurs, The maintenance personnel can open the liftable cover plate 8, take out the mesh bag of filter material, rinse it with water, and put it back for recycling, which is convenient for maintenance and saves cost.

Claims (10)

1. a kind of environment-friendly multi-stage filters inlet for stom water integrated apparatus, the water-carrying groove (3) including containing discharge outlet (9), it is characterized in that: Be covered in the water-carrying groove rain perforaled strainer (1), rain perforaled strainer have can overflow type sewage intercepting Hanging Basket (2), row in water-carrying groove At least tertiary filter is equipped with before the mouth of a river；Described every grade of filter is made of two pieces of porous permeable nets, and two pieces every grade permeable Online permeable hole aperture is identical, and the permeable hole aperture on tertiary filter permeable net (4,5,6) is from farthest away near row The mouth of a river reduces step by step, and variety classes filtrate is housed between two pieces of permeable nets of three-level and partial size reduces step by step, is set between tertiary filter It is equipped with liquid level regulatory region (7).

2. environment-friendly multi-stage according to claim 1 filters inlet for stom water integrated apparatus, it is characterised in that: the water-carrying groove (3) one end on is equipped with dismountable cover plate (8), the rain perforaled strainer (1) being covered on Prefabricated combined septic tank (2) in the other end, row The mouth of a river (9) is located at the opposite other end for being covered with rain perforaled strainer.

3. environment-friendly multi-stage according to claim 1 filters inlet for stom water integrated apparatus, it is characterised in that: described overflows The lower part of streaming Prefabricated combined septic tank is sieve, top is provided with overflow port.

4. environment-friendly multi-stage according to claim 1 filters inlet for stom water integrated apparatus, it is characterised in that: the water-carrying groove It (3) is rectangular parallelepiped structure, the bottom angled gradient is 5%, and discharge outlet is located at extreme lower position and is connected with municipal storm sewer.

5. environment-friendly multi-stage according to claim 1 filters inlet for stom water integrated apparatus, it is characterised in that: described is porous Permeable net is that plate, two vertical edges and bottom edge are fixed in the groove of described water-carrying groove the right and left and bottom, near draining The permeable net and 30~50cm of discharge outlet spacing of mouth.

6. environment-friendly multi-stage according to claim 1 filters inlet for stom water integrated apparatus, it is characterised in that: described porous The high 0.5m in the network of rivers, thick 2mm, two pieces of permeable net 10~15cm of spacing of peer, first order permeable hole aperture are 2cm, and the second level is permeable Hole aperture is 1cm, and third level permeable hole aperture is 0.5cm.

7. environment-friendly multi-stage according to claim 1 filters inlet for stom water integrated apparatus, it is characterised in that: every grade of filter Between there are liquid level difference, adjust 5~10cm of sector width.

8. environment-friendly multi-stage according to claim 1 filters inlet for stom water integrated apparatus, it is characterised in that: described section of dirty extension Basket is below rain perforaled strainer, and material is stainless steel, and height 0.2m, sieve mesh is square or round, side length or diameter 0.5cm has rectangle overflow port, long 0.1m, wide 0.03m in the surrounding side wall of top.

9. environment-friendly multi-stage according to claim 1 filters inlet for stom water integrated apparatus, it is characterised in that: the filtrate is each Grade is respectively zeolite, haydite, quartz sand or other qualified types, and every level-one particle diameter of filter medium is greater than porous permeable mesh Diameter, with filtrate mesh bag splendid attire.

10. environment-friendly multi-stage according to claim 1 filters inlet for stom water integrated apparatus, it is characterised in that: described to mention Pull-type cover board is cast iron quality, and top has lift-pull handle.