KR100848011B1 - System on removal of pollutants in urban runoff using upflow filtration reactor - Google Patents

Abstract

A system for the removal of contaminants in rainwater using an upflow filtration tank is provided to remove reliably fine particles with a particle size of 100 mum or less by using the upflow filtration tank and a porous buoyant filtering material, and maximally remove particulate contaminants contained in the rainwater by treating a large quantity of initial rainwater and preventing easy clogging of a filtering part due to the accumulation of contaminants. A system for the removal of contaminants in rainwater using an upflow filtration tank comprises: a storage tank(4) installed on an end portion of a rain inflow pipe(2) to store rainwater at all times; an upflow filtration tank(6) in which a porous buoyant filtering material is filled, and which filters contaminants by guiding rainwater comprising contaminant particles flown over the storage tank, thereby forming an upflow in the rainwater; a first baffle(22) which is vertically installed in a state that the first baffle is spaced apart from the bottom of a front part of the storage tank as much as a predetermined height to reduce a turbulent phenomenon generated by influent flown in from the rain inflow pipe; a second baffle(24) which is vertically installed at a predetermined height from the bottom of the storage tank and spaced apart from the first baffle to prevent influent that has passed through a part under the first baffle from excessively flowing into the upflow filtration tank; a discharge top plate(8) which is installed on a top part of the upflow filtration tank, and which guides filtered water passing through the upflow filtration tank and overflown water flowing over the storage tank to the treated water discharge side; and a treated water tank(12) installed in rear of the upflow filtration tank to store the filtered water before filtered water flowing along the discharge top plate is discharged to a discharge pipe.

Description

System on removal of pollutants in urban runoff using upflow filtration reactor}

Figure 1 is a longitudinal sectional view showing an embodiment of the pollutant removal device in rainwater using an upflow filter tank according to the present invention.

Figure 2 is a plan view of Figure 1;

Figure 3 is a front sectional view showing a filter box which is the main portion of the present invention.

Figure 4 is a plan view showing the configuration of the filter net flange in the filter box of Figure 3;

* Explanation of symbols for main parts of the drawings

2: rainfall inlet pipe 4: reservoir

6: Upflow Filter Tank 8: Outflow Plate

10: rectifying wall 12: treatment tank

The present invention relates to a non-point source purification apparatus for removing pollutants in rainwater generated from impervious surfaces such as roads and parking lots during rainfall, and more specifically, porous flotation of pulverized upflow type filter tank and foamed polymer material. By using the filter medium, it is possible to reliably remove the fine particles of 100㎛ or less, which is the main factor of the water pollution, and consequently, the pollutants in rainwater using an upflow filter tank that can prevent the contamination of the water system when the rainwater discharges into rivers and lakes. It relates to a removal device.

In general, environmental pollutants such as particulates contained in exhaust gases emitted by automobiles, especially diesel engine cars, dust from tire wear and dirt from asphalt wear, etc. It is easy to accumulate with pollutants floating in the atmosphere. As such, pollutants in rainwater occur in roads, residential complexes (parking lots), industrial complexes, and the like.

On the other hand, the pollutants discharged from vehicles such as automobiles are generally adsorbed by the particulate matter present on the road surface and are present in particulate form or the pollutants themselves discharged in particulate form. Contaminants contain large amounts of organic and nutrients, as well as branching barriers such as heavy metals and polynuclear aromatic hydrocarbons (PAHs). In particular, heavy metals and polynuclear aromatic hydrocarbons are known to accumulate in aquatic environments without being easily degraded and cause various diseases in humans. Removal of these components is important for water quality protection and health of aquatic systems.

These pollutants are very irregular in the form of pollutants depending on the dry season, rainfall, rainfall intensity and topographic conditions, but it is generally known that a large amount of pollutants are released during the early rainfall.

Non-point source treatment equipment operated without power is very important for the performance of media. The applied media should have good filtration and adsorption performance and less clogging for long-term use, but the natural media generally used do not satisfy these two conflicting factors.

Conventionally, there are relatively few examples of a system for treating initial rainwater while installing rainwater pipelines near roadsides or industrial complexes.However, recently developed examples show that STORMSYS is a structure type that adopts complex technologies and devices. In addition, the technique of pretreatment of nonpoint pollutants in the initial rainfall runoff on roads using the technical names catch basin, media and vegetation zone has been proposed.

However, this device is designed so that the amount of initial excellent water to be treated is too small and the filter part is easily closed due to clogging of the media, and its structure is complicated and it is difficult to install the facility because it has to be buried deep in the ground. .

Therefore, the present invention has been proposed to solve the above problems, by using a porous flotation media pulverized the upflow filter tank and the foamed polymer media to reliably fine particles of less than 100㎛ which is the main factor of water pollution The purpose of the present invention is to provide an apparatus for removing pollutants in rainwater using an upflow filter tank that can be removed.

In addition, the present invention is a rainwater in the rainwater using an upflow filtration tank that can process the greater amount of initial excellent water and the removal of the contaminant due to the accumulation of contaminants does not occur easily to remove the particulate contaminants contained in the rainwater to the maximum. Another object is to provide a contaminant removal device.

In order to achieve the above object, the present invention is installed at the end of the rainfall inlet pipe storage tank for storing the rainwater at all times; An upflow filtration tank filled with a porous buoyancy filter to induce upstream to form rainwater containing contaminant particles overflowing from the storage tank so as to filter contaminants; A first baffle installed upright from a bottom of a front end of the storage tank by a predetermined height to reduce turbulence caused by inflow water from a rainfall inflow pipe; A second baffle installed upright at a predetermined height from a bottom surface at a distance from the first baffle and preventing an inflow of water passing through a lower end of the first baffle from excessively entering an upflow filter tank; An outlet top plate installed at an upper portion of the upflow filtration tank to guide the filtered water and the overflowed water flowing over the storage tank to the treated water discharge side; And installed in the rear end of the upflow filter tank provides a pollutant removal device in rainwater using an upflow filter tank including a treatment tank for storing the filtered water flowing along the outflow top plate before being discharged to the outlet pipe.

Hereinafter, with reference to the accompanying Figures 1 to 4 will be described a preferred embodiment of the present invention.

The pollutant removal device in rainwater using an upflow filtration tank according to the present invention efficiently removes fine particles contained in rainwater generated on an impervious surface such as a road and a parking lot during rainfall, thereby preventing water pollution by nonpoint source. It is implemented to provide aquatic environment.

1 is a longitudinal sectional view showing an embodiment of the rainwater removal apparatus using the upflow apparatus according to the present invention, Figure 2 is a plan view of FIG.

The apparatus for removing particulate contaminants in rainwater using the upflow filter tank according to the present invention includes a storage tank 4 connected to an end of the rainfall inlet pipe 2 and storing rainwater as shown in the drawing; An upflow filtration tank (6) which removes fine particulate contaminants contained in the overflow water while inducing the overflow water flowing from the storage tank (4) to be an upstream flow; Outflow upper plate (8) which is installed on the upper surface of the upflow filter tank (6) and guides the filtered water flowing through it and the excess water exceeding the capacity of the storage tank (4) to pass to the treated water discharge side; A rectifying wall (10) installed upright at a predetermined height at the bottom of the upflow filtration tank (6) to control precipitation of particulate contaminants; And a treatment water tank 12 installed at the rear end of the upflow filtration tank 6 to induce treatment rainwater flowing through the outflow upper plate 8 to be discharged to the outflow pipe.

Here, the storage tank 4 is provided with a first baffle 22 on its inner front end side and a second baffle 24 on its rear end. The first baffle 22 is installed upright by a predetermined height away from the bottom surface to allow the inflow of water to pass through the bottom thereof and to reduce turbulence caused by the inflow of water from the rainfall inlet pipe 2. Function That is, as indicated by the arrows in FIG. 1, the inflow water discharged from the rainfall inlet pipe 2 falls while hitting the first baffle 22 and passes through the passage under the first baffle 22, thereby preventing turbulence. Will be reduced. The second baffle 24 is installed upright from the bottom surface of the storage tank 4 to a predetermined height, and serves to prevent excessive flow rate into the upflow filter tank 6.

One side of the second baffle 24 is provided with a grid-shaped flow rate adjusting guide wall 26 at a predetermined interval. The flow rate control guide wall 26 guides only a certain amount of the overflow water flowing through the second baffle 24 into the upflow filter tank 6, and the remaining excess flow rate does not pass through the upflow filter tank 6. To flow directly to the outlet top plate (8). Accordingly, it is possible to prevent the desorption of contaminants adsorbed on the buoyant filter filled in the filter box 32 which will be described later, which may occur when the rainfall intensity increases in a large amount of rainfall intensity.

According to the configuration in which the rectifying wall 10 is installed, the contaminants that settle at the bottom of the filtration tank are concentrated at the front of the rectifying wall 10 rather than being constantly accumulated at the bottom of the filtration tank. In order to maintain the system of the present invention, it is necessary to periodically remove contaminants at the bottom of the filtration tank. At this time, contaminants are concentrated in front of the rectifying wall 10. By removing it, contaminants can be controlled more easily.

On the other hand, in the present invention, when the scale of the facility is enlarged, a separate wear may be installed on the upper part of the second baffle.

Figure 3 is a front sectional view showing a filtration box which is a main part of the present invention, Figure 4 is a plan view showing the configuration of the filtration network flange in the filtration box of FIG.

As shown in the figure, a plurality of the upflow filter tank 6 is installed so that the outlet top plate is suspended in each hole, and filled with a porous buoyant filter medium for adsorbing and filtering the fine particulate contaminants contained in the upwardly influent. A filter box 32; A permeation network 34 installed on the upper and lower surfaces of the filter box 32 to support the porous buoyancy filter while passing the water body; And a lid 36, one end of which is connected to the upper end of the filter box 32 and the other end of which is connected to the outlet top plate 8, to detachably support the filter box 32. And a handle 38 installed at the upper end of the lid 36.

The buoyant filter medium filled in the filter box 32 uses a pulverized foamed polymer filter material to be adsorbed and removed to contaminant particles of 100 μm or less.

The flotation media is a media having a polypropylene material, foamed polypropylene beads, and then made into a plate through steam molding, and is manufactured by grinding. The flotation media produced by this method has a specific gravity of 0.2 or less, and the specific gravity is determined according to the expansion ratio of polypropylene. As the flotation media has buoyancy when rainfall runoff flows in, the condensation forms are condensed to the upper part of the filter box in the upflow filter box, and the consolidation form is changed little by little by changing the flow rate of the inflow water. Spread evenly across, minimizing clogging, so that it can be used without long-term back washing. In addition, the specific surface area is increased in the process of roughly crushing the expanded polypropylene plate-like product, thereby improving the performance of adsorbing oil and polynuclear aromatic hydrocarbons.

In an embodiment of the present invention, the height between the bottom of the filtration tank 6 and the filtration box 32 can be maximized by increasing the height according to the situation of the site to install the facility.

In addition, the upflow filter tank 6 has a structure in which a plurality of filter boxes 32 are arranged in a plurality of rows in consideration of the size of the entire system.

The outflow upper plate 8 is formed so that a plurality of circular or rectangular holes penetrate the surface so as to sandwich the filter box 32 as shown in FIG. 2, and the filter box 32 is fixed to the periphery of the hole. The bolt is fixed so as to be installed, it is used as a fixed passage of the filter box 32 and the moving passage of the filtered water and the overflow water. The material of the spilled upper plate 8 may be made of concrete, SUS, or the like depending on the size and site of the facility.

The outflow upper plate (8) is a passage for moving the contaminant-removed rainfall effluent through the upflow filter tank (6) to the treatment tank and the rainfall flowing over the designed flow rate is overflowed to the treatment tank (12). The passage is made of a cross-sectional arrangement to enable separation and installation of the filter box (32).

Referring to the working state of the present invention configured as described above are as follows.

First, when rainfall starts, pollutants such as surface layers and road surfaces are introduced into the storage tank 4 through the rainfall inlet pipe 2 of the storm drainage system along with the initial rainwater.

At this time, the first baffle 22 reduces the turbulence caused by the inflow water, and the inflow water introduced into the storage tank 4 passes through the bottom space of the first baffle 22. The inflow water stays in the storage tank 4 for a predetermined time and then flows up the second baffle 24 as the water level rises. At this time, the overflow water within a design flow rate flows into the filtration tank 6 through the flow control guide wall 26 provided at one side of the second baffle 24. The overflow water flows through the flow control guide wall 26 to form an upward flow, and passes from the lower end of the filter box 32 to the upper end through the permeation network 34. The water passing through the permeation network 34 is filtered through the contaminant filled in the filter box 32, the particulate contaminants are filtered. The treated rainwater moves to the treatment tank 12 through the outflow upper plate 8, and the rainwater over the designed flow rate moves to the outflow upper plate 8 through the upper surface of the flow control guide wall 26 without passing through the filtration tank. Flows into (12).

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

As described above, according to the present invention, the particulate contaminant removal system of the present invention can effectively remove the fine particulate contaminants contained in the rainwater, thereby removing heavy metals and polynuclear aromatic hydrocarbons as well as organic substances and nutrients contained in the rainwater. It can prevent water pollution by preventing the pollutants in rainwater from entering the water ecosystem such as rivers or lakes.

Claims (10)

delete A storage tank installed at the end of the rainfall inlet pipe for storing the rainwater at all times; An upflow filtration tank filled with a porous buoyancy filter to induce upstream to form rainwater containing contaminant particles overflowing from the storage tank so as to filter contaminants; A first baffle installed upright from a bottom of a front end of the storage tank by a predetermined height to reduce turbulence caused by inflow water from a rainfall inflow pipe; A second baffle installed upright at a predetermined height from a bottom surface at a distance from the first baffle and preventing an inflow of water passing through a lower end of the first baffle from excessively entering an upflow filter tank; An outlet top plate installed at an upper portion of the upflow filtration tank to guide the filtered water and the overflowed water flowing over the storage tank to the treated water discharge side; And Treatment tank installed in the rear end of the upflow filter tank for storing the filtered water flowing along the outflow top plate before being discharged to the outlet pipe Pollutant removal device in rainwater using an upflow filter tank comprising a. The method of claim 2, The upflow filtration tank is Upper and lower filter boxes; A transmission network installed at upper and lower openings of the filter box to fill and support the porous media while passing the water body; And One end is connected to the upper side of the filter box and the other end is connected to the outlet plate for supporting means for supporting the filter box detachably Pollutant removal device in rainwater using an upflow filter tank comprising a. The method of claim 3, wherein The support means A lid installed on the upper portion of the filter box; And Is installed on the upper surface of the lid pollutant removal device in rainwater using an upflow filter tank including a handle for detaching the filter box from the outflow top plate. The method of claim 2, The flotation media of the upflow filtration tank is a pollutant removal device in rainwater using an upflow filtration tank, characterized in that the foamed polymer media is pulverized so as to be adsorbed and removed to contaminant particles of less than 100um. The method of claim 2, The upstream filter tank is installed upright from the bottom of the upflow filter tank to remove pollutants in rainwater using an upflow filter tank further comprises a rectifying wall for controlling the precipitation of particulate contaminants. The method of claim 2, It has a lattice shape and is installed at one side of the second baffle at a predetermined interval so that only a predetermined amount of the overflow water flowing over the second baffle flows into the upflow filter tank, and the remaining excess flow flows directly to the outlet plate. Pollutant removal device in rainwater using an upflow filter tank further comprising a guide flow guide wall to guide. The method according to any one of claims 3 to 5, The upflow filter tank is a pollutant removal device in rainwater using an upflow filter tank, characterized in that the plurality of filter boxes arranged in a plurality of rows. The method according to any one of claims 2 to 7, The buoyant filter material filled in the filter tank is made of a plate-like product by steam molding after foaming the polypropylene beads, and the apparatus for removing contaminants in rainwater using an upflow filter tank, characterized in that the manufacturing process through the grinding process. The method of claim 9, The flotation medium has a specific gravity of 0.2 or less, the apparatus for removing pollutants in rainwater using an upflow filter tank.

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