KR101687180B1 - Natural type nonpoint pollution decrease infiltration trench - Google Patents

Abstract

The present invention relates to a method and a device for separating the stormwater from the sedimentation tank by moving the stormwater flowing into the sedimentation tank from the lower part to the upper part and contacting the plurality of polymer filters to filter the stormwater, The present invention relates to a natural type infiltration ditch for reducing non-point pollution, which is capable of enhancing the filtration effect of rain water supplied from a horizontal filtration means in a sedimentation tank. The natural type infiltration ditch has an upper part buried in the ground and an upper part provided with a grating, A sedimentation tank having an inlet connected to an upper portion thereof and an outlet having an upper portion formed at an upper portion thereof; Vertical filtration means vertically disposed on the other side of the sedimentation tank and contacting the plurality of polymer filters while moving the storm introduced from the lower portion to the upper portion to filter the stormwater and discharge only the filtered supernatant to the storm drain; An underground depression formed in the other side of the settling tank so as to be depressed in the left and right direction through a digging operation and connected to a drainage unit for discharging the storm, And a horizontal filtration unit installed inside the ground depression and re-filtering the storm that flows into the upper part of one side through the storm drain to penetrate into the ground below the ground depression.

Description

Natural type nonpoint pollution decrease infiltration trench for reducing nonpoint pollution

More particularly, the present invention relates to a natural type infiltration ditch for reducing non-point pollution, and more particularly, to an infiltration method in which a stormwater introduced into a settling tank is contacted with a plurality of polymer filters (filter media) Is supplied to the horizontal filtration means to increase the contact time of the fine and polymer filters introduced into the sedimentation tank, thereby improving the filtration efficiency of the fine supplied by the horizontal filtration means in the sedimentation tank. .

Generally, pollutants are divided into nonpoint pollutants, such as dirt, industrial wastewater, and livestock wastewater, which are discharged from a wide range of non-point pollutants, such as point pollutants emitted from clear, limited point sources, and urban, road and farmland .

However, in the case of non-point pollutants, the discharge area is unclear and remains on a wide range of ground surface, and it becomes a main cause of water pollution by entering into public waters such as rivers and groundwater in rainy weather. Therefore, as a conventional method for treating non-point pollutants, a method of using infiltration ditches, which are infiltration facilities that infiltrate into the soil layer after purification of rainwater, is widely used.

Accordingly, the present invention is an improvement of a conventional infiltration-type infiltration trench. An example of a conventional infiltration trench is an infiltration trench (hereinafter referred to as " infiltration trench having a function of reducing natural water circulation and non- "Conventional penetration ditch") is as follows.

As shown in FIG. 6, the conventional infiltration trench has an inflow section 20 having an inflow pipe 21 formed on one side thereof for inflow of contaminated water; A filter layer is formed in the inlet portion 20 and the contaminated water in the inlet portion 20 flows into one side of the filtration layer or flows into the upper portion of the filtration layer, (30); And an outlet (40) having an outflow pipe (41) formed on one side thereof so as to allow the contaminated water flowing through the filter material outlet hole (34) to flow to the outside, and a natural water circulation and nonpoint pollution abatement function The underground induction section 50 is formed in the infiltration ditch to guide the contaminated water filtered under any one of the inflow section 20, the filter medium section 30 and the outflow section 40 to the basement, The induction unit 50 includes an underground induction hole 51 formed in a lower portion of any one of the inflow unit 20, the filter unit 30 and the outflow unit 40 and an underground induction hole And the length of the underground induction pipe 52 is longer than the length of the underground induction hole 51 so that a part of the underground induction pipe 52 is exposed to the upper part of the underground induction hole 51 .

A plurality of filter unit inlet holes 31 are formed on one side of the filter unit 30 so that the contaminated water in the inlet 20 flows into one side of the filter unit 30. The inlet unit 20 (Not shown) is formed at the upper end of one side of the filter material portion 30 so that the contaminated water can flow into the upper portion of the filter material portion 30.

The wood chip pack 25 is formed horizontally in the inlet 20 so that the contaminated water in the inlet 20 is filtered and the inlet 20 is introduced into one side of the filter 30, And is formed vertically inside the inflow portion 20 so that the contaminated water is filtered.

A gravel layer 26 or a sand layer 27 is formed on the lower part of the inlet 20. The gravel layer 36 and the sand layer 37 are formed to cross the filtration layer, And a wood chip pack 35 is formed on the gravel layer 36. A plurality of porous pipes 39 are arranged horizontally in the filter medium 30 so that the polluted water flowing through one side of the inlet 20 moves into the filter medium 30. [

However, the conventional penetration trench having the above-described structure has the following problems.

First, in the conventional infiltration trench, the other side of the inflow portion is provided with a wood chip pack which blocks a plurality of filter medium inflow holes having different heights. In this way, the wood chip packs provided on the other side of the inflow portion are opened on both sides The contaminated water is contacted with the wood chips while the contaminated water is moved in the horizontal direction in the inflow part, so that the contact time between the contaminated water and the wood chips is short and the filtering effect through the wood chip is deteriorated.

Further, when the inflow amount of the conventional infiltration ditch is small, the contaminated infiltration is introduced into the filter material through the pipe located at the bottom and the middle, and then flows into the ground through only the gravel layer and the sand layer, And there was a problem of polluting the ground.

In the conventional penetration ditch, a plurality of underground induction holes are drilled in a lower plate composed of reinforced concrete and inserting an underground induction pipe having a small diameter into each underground induction hole, It is easily clogged due to foreign substances such as dust and the like.

In addition, since the conventional infiltration ditch has the concrete structure for installing the filter media portion on the right side of the inflow portion, the construction cost of the infiltration ditch due to the manufacture of the concrete structure for installing the filter media portion is excessively increased.

In addition, the natural type non-point pollution abatement facilities including infiltration ditch occupy a large area and volume compared to the device type calculated by the filtration area, Since the average porosity of aggregate such as sand and gravel used is usually 32%, the facility volume is more than three times larger than the capacity.

Korean Patent Registration No. 1095322 entitled "Penetration Ditch Combining Natural Water Circulation and Nonpoint Pollution Reduction Function" (December 12, 2011)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art,

An object of the present invention is to provide an apparatus and a method for separating a stormwater from a sedimentation tank by moving the stormwater introduced into the sedimentation tank from the lower part to the upper part and contacting the plurality of polymer filters And to provide a natural type infiltration ditch for reducing the non-point contamination, which can improve the filtration effect of the fine supplied from the horizontal filtration means in the sedimentation tank by increasing the contact time of the polymer filters.

Another object of the present invention is to provide a method of reducing the amount of nonpoint pollutants contained in rainwater even when the inflow amount of rainwater is small even when the inflow amount of stormwater is small even when the inflow rainwater is small, And to provide a natural type infiltration ditch for reducing non-point pollution.

Another object of the present invention is to provide a natural type infiltration ditch for reducing the non-point pollution so that the infiltration of the cleaned fine discharged from the box filtration part can proceed smoothly by providing the sand layer at the bottom of the under- .

It is another object of the present invention to provide a natural type infiltration ditch for reducing the non-point pollution so as to reduce the construction cost of the infiltration trench by directly providing the box filtration section in the ground without preparing a separate concrete structure on the drainage side of the settling tank .

It is another object of the present invention to provide a matrix box in which a polymer filter is filled in a prefabricated manner to facilitate transportation and construction, and a matrix box can be constructed as a slide assembly type to easily form a matrix box in a rectangular parallelepiped shape And a natural type infiltration ditch for reducing non-point contamination.

Another object of the present invention is to provide a natural type infiltration ditch for reducing the non-point pollution, which prevents each of the perforated plates constituting the matrix box from being detached after being assembled in the form of a rectangular parallelepiped, .

Another object of the present invention is to provide a natural type infiltration ditch for reducing non-point pollution which can reduce the facility volume of general infiltration ditch more than half by increasing the porosity by 95% or more by using a part of the infiltration ditch media layer as a crick box .

Another object of the present invention is to provide a polymer filter composed of a conical floating polymer filter, which is capable of suppressing sedimentation and inertial force, which is a physical fluid mechanism between the contaminant particles contained in the well and the trapper (filter) It is possible to effectively induce adhesion (inertial collision), interception, and diffusion phenomenon, thereby realizing a natural type infiltration ditch for the reduction of non-point pollution, which effectively removes solid matter and oil by various particle diameters .

In order to accomplish the above object, a "natural type infiltration ditch for reducing non-point pollution" according to the present invention is characterized in that an upper part is buried in the ground to be exposed, a grating is provided on the upper part, an inflow part is connected to the upper part, A sedimentation tank having an upper discharge port formed therein; Vertical filtration means vertically disposed on the other side of the sedimentation tank and contacting the plurality of polymer filters while moving the storm introduced from the lower portion to the upper portion to filter the stormwater and discharge only the filtered supernatant to the storm drain; An underground depression formed in the other side of the settling tank so as to be depressed in the left and right direction through a digging operation and connected to a drainage unit for discharging the storm, And a horizontal filtration means installed inside the ground depression for re-filtering the storm that flows into the upper portion of one side through the storm drain to penetrate the ground below the ground depression, A lower permeable sheet laminated on the upper part of the sand layer, and a non-point pollutant disposed on the upper part of the lower permeable sheet, And a box filtration part for discharging the filtrate to the lower part. A cover permeable sheet surrounding the box filtration part and an upper portion of the box filtration part; a peripheral gravel layer filled in the peripheral space; and a laminated gravel layer stacked on the peripheral gravel layer and the box filtration part.

Further, the vertical filtration means of the " natural type infiltration ditch for reducing non-point pollution "according to the present invention is provided on the other side wall of the settling tank so as to communicate with the above- A case having an upper portion opened; And a box filtration unit disposed inside the case and filtering the nonpoint pollutant contained in the rainwater, which is transported from the lower part to the upper part, through the polymer filters and discharging the nonpoint pollutant to the rainwater discharge port.

The case of the "natural type infiltration ditch for reducing non-point pollution" according to the present invention is fixed to one side of the outlet port formed on the other side wall of the settling tank so as to protrude to one side, And a single vertical plate connected to the front and rear vertical plates which are tightly fixed to each other and one end of the front and rear vertical plates are integrally connected to each other and a bottom inflow hole is formed.

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Further, the horizontal filtration means of the " natural type penetration trench for reducing non-point pollution "according to the present invention further comprises an upper permeable sheet laminated on the laminated gravel layer and a laminated layer laminated on the upper permeable sheet .

Further, the box filtration part of the "natural type nonpoint pollutant-reducing permeation ditch" according to the present invention is characterized by comprising a combination of a plurality of matrix boxes filled with polymer filters therein.

Further, the matrix box of the " natural type penetration trench for reducing non-point pollution "according to the present invention comprises: a lower perforated plate formed with T-shaped grooves in the longitudinal direction on both sides of the upper portion and having a plurality of water holes; And a lower T-shaped protrusion is slidably inserted into the T-shaped grooves on both sides of the lower perforated plate, and a plurality of water holes are formed in the lower T- and; Shaped groove is formed on both sides of the inner side facing each other, and a T-shaped groove formed on both inner side surfaces of each of the T-shaped projections positioned in front of both side porous plates and a T- Respectively, and each of the front and rear sidewalls is formed with a plurality of water through holes; And a top plate having a T-shaped groove formed in a longitudinal direction on both sides of a lower portion thereof, a T-shaped groove on both sides thereof being slidably inserted into a T-shaped protrusion of the side porous plates on both sides thereof, .

In addition, one tap hole is formed on the front porous plate of the " natural type penetration groove for reducing non-point pollution "according to the present invention, an assembly hole is formed in the upper plate, And a fixing bolt is inserted into the assembly hole and the tap hole.

Further, the box filtration part provided inside the case of the "natural type infiltration ditch for reducing non-point pollution" according to the present invention comprises vertically stacked combination of the matrix boxes to form a vertically long rectangular parallelepiped, And the box filtering part provided on the upper part of the matrix box is configured in the form of a long rectangular parallelepiped horizontally by continuously combining the matrix boxes in front, back, left, and right.

The polymer filter according to the present invention is characterized in that a high-density polyethylene (HDPE) film strip is formed by spirally winding a cone-shaped floating polymer filter.

In addition, the conical filter of the "natural penetration trench for reducing non-point pollution" according to the present invention is characterized in that a high density polyethylene (HDPE) band is manufactured by spirally spinning 4 to 10 times.

As described above, according to the present invention, the stormwater introduced into the sedimentation tank is moved from the lower part to the upper part and is contacted with the plurality of polymer filters to filter the stormwater, and only the filtered water is supplied to the horizontal filtration unit, It is possible to further improve the effect of reducing the nonpoint pollutants contained in the rainwater by increasing the contact time of the polymer filters and improving the filtration effect of the rainwater supplied from the horizontal filtration means in the sedimentation tank.

Further, according to the present invention, even when the inflow amount of the stormwater is small, the inflow stormwater is allowed to pass through the gravel layer, the box filtration portion and the sand layer, so that the effect of reducing the non- There is also an effect.

In addition, the present invention provides a sand layer at the bottom of the bottom depression to smoothly penetrate the underground penetration of the purified wells discharged from the box filtration portion, thereby achieving excellent underground penetration effect with reduced non- There is also an effect of providing infiltration ditch.

In addition, the present invention has the effect of lowering the construction cost of the infiltration trench by providing the box filtration portion directly in the ground without producing a separate concrete structure on the drainage side of the settling tank.

In addition, the present invention provides a matrix box that is filled with a polymer filter in a prefabricated manner, facilitating transportation and construction, and a matrix box can be constructed as a slide assembly so that a matrix box can be easily assembled in a rectangular parallelepiped shape with a small force Thereby, it is possible to provide an infiltration ditch which can make the construction of the matrix box more easily.

The present invention also provides an improved durability matrix box capable of preventing the perforated plates constituting the matrix box from being detached and separated after the matrix box is assembled in the form of a rectangular parallelepiped.

In addition, the present invention can increase the porosity by 95% or more by using a part of the permeable ditch material layer as a crisscross box, thereby reducing the facility volume of the general permeation ditch by more than half.

In addition, the present invention relates to a polymer filter composed of a conical floating polymer filter, which can be used for sedimentation which is a physical fluid mechanism between the contaminant particles contained in the well and the collector (filter), adhesion by inertial force Collision, interception, and diffusion can be effectively induced, thereby effectively removing various solids and oil fractions included in the rainbow.

1 shows a penetration trench according to the present invention,
1A is a perspective view,
FIG. 1B is a cross-sectional view taken along line AA of FIG. 1A,
1C is a sectional view taken along the line CC in Fig. 1B,
1D is a cross-sectional view taken along line DD of Fig. 1B.
2 is an enlarged view of a settling tank constituting the present invention,
2A is a cross-sectional view,
2B is an enlarged perspective view of the vertical filtration means.
Fig. 3 shows a matrix box constituting the present invention,
3A to 3C show a process of assembling the matrix box,
Figure 3d shows the assembled state,
3E is a sectional view taken along line EE of Fig. 3D.
4 shows a polymer filter constituting the present invention,
4A is a perspective view and a side view,
4B is a perspective view illustrating the elastic deformation of the polymer filter,
4C is a view showing an example of a high-density polyethylene (HDPE) film strip for producing a conical floating polymer filter.
4D to 4G are diagrams for explaining the hollow hollow precipitating mechanism of the conical floating polymer filter (collector) of the present invention,
4H to 4J are views for explaining the oil separation and the oil separation mechanism in the continuous operation filtration process by the conical floating polymer filter (collector) of the present invention,
FIG. 4K is a view for explaining the mechanism of oil separation and the backwashing mechanism of the initial excellent filtration process by the conical floating polymer filter (collector) of the present invention.
5 is a perspective view showing a filter of the prior art.
6 is a schematic cross-sectional view showing a conventional penetration trench.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the invention can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

1B is a sectional view taken along line AA in Fig. 1A, Fig. 1C is a sectional view taken along a line CC in Fig. 1B, Fig. 1D is a sectional view taken along the line DD in Fig. 1B, to be. Fig. 2 is an enlarged view of the sedimentation tank constituting the present invention. Fig. 2a is a sectional view, and Fig. 2b is an enlarged perspective view of the vertical filtration means. 3A to 3C show a process of assembling the matrix box, FIG. 3D shows the assembled state, and FIG. 3E is a sectional view taken along line E-E of FIG. 3D.

As shown in FIG. 1, the infiltration trench according to the present invention has an inlet port 12 through which an upper portion is exposed and an upper portion is connected to an upper portion through which rainwater flows, A vertical filtration means 2 vertically provided on the other side of the interior of the settling tank 1 and a drainage unit 31 formed on the other side of the settling tank 1 in a long left- And a horizontal filtration unit 4 installed inside the underground depression 3. The horizontal depression unit 3 is connected to the ground depression unit 3,

The settling tank (1) serves to initially settle the storm that has flowed into the inside of the sediment tank (1), thereby sinking the sediment contained in the storm. The settling tank 1 having such a shape is formed in the shape of a rectangular parallelepiped having an open top, and it is preferable that a grating 11 is provided at an upper portion of the settling tank 1 so that the storm can be introduced into the open top.

It is preferable that the inflow section 12 is constituted by a U-shaped or tubular sidewall which is formed so as to be recessed on the ground so as to collect the rainwater falling on the ground and to flow into the settling tank 1.

2 and 3, the vertical filtration means 2 constituting the present invention is vertically provided on the other side of the interior of the sedimentation tank 1, And moves in contact with the plurality of polymer filters (F1) while filtering out the stormwater, and discharging only the filtered supernatant to the storm drain (13).

The vertical filtration means 2 having such a function is provided on the other side wall of the sedimentation tank 1 in communication with the storm drainage port 13 to allow the stormwater to flow in from the lower portion of the inner portion to the upper portion, The non-point contaminants contained in the rainwater which is provided in the case 21 and is moved upward from the bottom are filtered through the polymer filters F1 and discharged to the outflow outlet 13 And a box filtration portion F as shown in Fig.

The case 21 is fixed to the front and rear of the outlet 13 formed on the other side wall of the settling tank 1 so as to firmly house the box filtration part F without leaving the box filtration part F The lower ends of the front and rear vertical plates 211 and 212 and the front and rear vertical plates 211 and 212 are fixed to the lower surface of the settling tank 1, And a single vertical plate 213 on the lower portion where the intrusion inflow hole 214 is formed.

Particularly, the box filtration unit F is composed of a combination of a plurality of matrix boxes B filled with polymer filters F1, and a detailed description thereof will be described later. In addition, a description of the polymer filter F1 filled in each of the above-mentioned mattress box (B) will be described later.

1 and 3, the ground depression 3 constituting the present invention is formed so as to be recessed in the left and right direction through the ground wave in the ground on the other side of the settling tank 1, And serves as a space for installing the horizontal filtration means 4.

It is preferable that the bottom of the underground depression 3 serving as the above-mentioned function is formed as a flat surface so that the horizontal filtration means 4 can be easily installed. In addition, it is preferable that a drainage unit 31 for discharging the overflowing water from the underground depression 3 is connected to the upper portion of the other side of the underground depression unit 3.

The drainage unit 31 is preferably formed of a U-shaped or tubular sidewall so as to prevent the untreated storm surge from overflowing in the underground depression 3 and infiltrating into the ground.

1 and 3, the horizontal filtration means 4 constituting the present invention is installed inside the underground depression portion 3 and is connected to the upper portion of one side The inflowing stormwater is filtered again to penetrate into the lower ground of the underwater depression portion 3.

The horizontal filtration means 4 serving as the above function comprises a sand layer 41 filled in the lower portion of the underground depression 3, a lower permeable sheet 42 stacked on the sand layer 41, A box filtration part F disposed at the upper part of the lower permeable sheet 42 and spaced apart from the lower part of the lower permeable sheet 42 and filtering the non-point pollutant contained in the storm that moves from the upper part to the lower part through the polymer filters F1 and discharging the same downward; A cover pervious sheet 43 surrounding the box filtration part F and an upper and a periphery of the box filtration part F, a peripheral gravel layer 44 filled in the peripheral space, a peripheral gravel layer 44 and a box filtration part F And a laminated gravel layer 45 laminated on the upper part. The horizontal filtration means 4 includes an upper permeable sheet 46 stacked on top of the laminated gravel layer 45 and a finer layer stacked on top of the upper permeable sheet 46 so as to make the surface more flat. (47).

The gravel layer 47, the laminated gravel layer 45 and the surrounding gravel layer 44 are formed of irregular gravel. The gravel layer 47 is naturally cleaned by passing through the gaps formed by the pebbles containing non-point pollutants.

The upper water permeable sheet 46, the cover water permeable sheet 43 and the lower water permeable sheet 42 are formed of a fiber filter, and serve to filter contaminants contained in the water while permeating the water containing the non- do.

The box filtration unit F includes a combination of a plurality of matrix boxes B filled with polymer filters F1, and a detailed description thereof will be described later. In addition, a description of the polymer filter F1 filled in each of the above-mentioned mattress box (B) will be described later.

The sand layer 41 performs a function of passing the rainwater containing the non-point pollutant through the pores formed by the sand and allowing the rainwater to permeate downward and permeating the ground through the lower part of the under-buried part 3 . Therefore, according to the present invention, since the sand layer 41 is provided at the bottom of the underground depression 3, the underground penetration of the excellent under which the non-point pollutant discharged from the box filtration part F is reduced can be smoothly progressed , And the matrix boxes (B) can be more stably seated.

Therefore, the present invention has an advantage that the construction cost of the infiltration trench can be lowered by providing the box filtration part F directly in the ground without preparing a separate concrete structure on the drainage side of the settling tank 1.

1 to 3, the box filtration part F constituting the vertical filtration means 2 or the horizontal filtration means 4 of the present invention is a box filtration system in which polymer filters F1 are filled therein And a combination of a plurality of matrix boxes (B), thereby reducing non-point pollutants contained in the rain.

The matrix box B having such a function is provided with a lower perforated plate B1 in which T-shaped grooves T1 are formed in the longitudinal direction on both sides of the upper portion and a plurality of water through holes H are formed, And a lower T-shaped protrusion T2 is formed on both sides of the lower sidewall T1 of the lower sidewall B1 and the lower T-shaped protrusion T2 is slidably inserted into the lower sidewall T1 of the lower sidewall B1 A plurality of water holes H formed on the side plate B2; a T-shaped groove T1 formed on both sides of the inner side opposite to each other and formed on both sides of the inner side; Are inserted into the T-shaped protrusions (T2) positioned forward of the side porous plates (B2) and the T-shaped protrusions (T2) located at the rear, respectively, and a plurality of water through holes The front and rear perforated plates B3 and B4 and the T-shaped grooves T1 in the longitudinal direction are formed on both sides of the bottom and the T-shaped protrusions T2 on both sides of the perforated plate B2. It is most preferable that the T-shaped groove T1 on both sides is slidably inserted and the upper perforated plate B5 on which a plurality of water passage holes H are formed.

One tab hole J1 is formed on the front perforated plate B3 and an assembly hole J2 is formed on the upper perforated plate B5 at a position corresponding to the tab hole J1, The fixing bolt J3 may be passed through the hole J2 and the tap hole J1. Therefore, after the assembly of the matrix box B is completed through the fastening of the fixing bolts J3, the matrix box B can not be disassembled at all. According to the present invention, by fastening the fixing bolts J3 It is possible to prevent disassembly damage of the matrix box B even if a large vertical load is transferred to the matrix box B after the installation of the matrix box B is maximized by improving the durability of the assembled matrix box B to the maximum There is also.

Particularly, the box filtration part F provided in the case 21 has a structure in which the matrix boxes B are stacked vertically so as to increase the contact time of the polymer filter F1, It is preferable that they are configured in the form of a vertically long rectangular parallelepiped.

In addition, the box filtration part F provided on the lower permeable sheet 42 has a structure in which the matrix boxes B are disposed in front of, behind, left, Most preferably in the form of a horizontally long rectangular parallelepiped extending in the left-right direction.

Therefore, the present invention is advantageous in that the matrix box B filled with the polymer filter F1 can be constructed as a prefabricated structure, facilitating transportation and construction, and the matrix box B can be constructed as a slide assembly type, It is possible to assemble the matrix box B into a rectangular parallelepiped shape simply. Particularly, the present invention is characterized in that after the matrix box B is assembled in the form of a rectangular parallelepiped, the perforated plates constituting the matrix box B are prevented from being detached and separated from each other, ) Is also provided.

The polymer filter F1 filled in each matrix box B is composed of a conical floating polymer filter formed by spirally winding a high density polyethylene (HDPE) film strip, as shown in FIG.

The high density polyethylene (HDPE) has a density of 0.95 or more and is lighter than water, and has a higher strength and lower abrasion resistance than a low density LDPE. In addition, when the film is peeled off, it is excellent in elastic restoring force and has a hydrophobic property as a water treatment filter, which is separated from water when immersed in water. Because of this feature, it is suitable as the basic base of solids (SS) which is a hydrophobic particulate matter in water and a collector (filter) which collects oil by filtration.

The high density polyethylene (HDPE) film strip may be made of a high density polyethylene (HDPE) film having a molecular weight of 900,000 or more. The conical filter of the present invention may be in the form of a high density polyethylene (HDPE) band formed by spirally spinning 4 to 10 times, preferably 5 to 7 times. In addition, the conical filter may be partially overlapped with a high density polyethylene (HDPE) band or may be in a non-overlapping, dry form (see FIGS. 4A and 4B).

As shown in FIG. 4A, when the high density polyethylene (HDPE) band is in a dry form without overlapping, the inner space and the outer space of the conical filter can be communicated by a spiral open space. When the external force due to the flow pressure of the fluid or the close adhesion between the adjacent polymer filters acts on the conical body, the external shape of the conical body is elastically deformed. When the external force is removed, the external shape of the conical body is resiliently restored . This function is the same even when the high density polyethylene (HDPE) band is in a dry form so as not to overlap. That is, even in this case, the inner space and the outer space of the cone-shaped filter are communicated by the spiral open space.

In addition, as shown in FIG. 4C, the high density polyethylene (HDPE) band for manufacturing the spirally dried conical floating polymer filter according to the present invention has one end having a relatively wide width and the other end having a relatively narrow width And may have a tapered shape in which the width gradually narrows from one end portion having a relatively wide width toward the other end portion having a relatively narrow width. A conical floating polymer filter made of this type of high density polyethylene (HDPE) band has a shape as shown in FIG. 4A.

The high density polyethylene (HDPE) band for making the spirally dried conical floating polymer filter may have a rectangular shape. The high density polyethylene (HDPE) band has one end which is relatively thick in thickness and the other end which is relatively thin in thickness and whose thickness gradually decreases from one end of the thickness being relatively thick to the other end which is relatively thin in thickness And the like. Therefore, when the high density polyethylene (HDPE) band has the above-described shape, the band is automatically curled when the high density polyethylene is peeled, thereby forming a conical floating polymer filter easily.

The cone-shaped floating polymer filter of the present invention has a cone bottom diameter of 14 to 50 mm and a length of 30 to 100 mm. The film band for manufacturing the cone-shaped floating polymer filter has a thickness of approximately 0.01 to 0.08 mm Can be used. The conical floating polymer filter is formed as a hollow cone, thereby minimizing weight to volume surface area. If the size of the polymer filter is too large, the weight of the polymer filter becomes larger than the specific gravity of the water, and it sinks without floating in the water. On the contrary, if the size is too small, the surface area is small to deteriorate the water separation performance and solids removal performance. If the weight is too light, the polymer filter floats completely on the water surface,

The filling density of the polymer filter F1 is in the range of about 80% of the volume of the filtration chamber in a natural state without external pressure, and ensures the fluidity of the polymer filter according to the flow rate. The filling density of the polymer filter F1 set as described above causes a space to be formed between the polymer filter F1 and the polymer filter F1 which are close to each other and forms a flow path through which the process water flows. Also, a flow path through which the treated water flows is formed also by the hollow internal space of the cone.

Therefore, when the oil passes through the matrix box (B) filled with the polymer filter (F1) containing the oil component and the non-point pollutant, the oil component is formed between the surface and the space of the conical floating polymer filter made of the high- It merges while riding. When the combined oil droplets increase in size, they float and are removed from the water, and the solids of the SS component fall to the bottom of the mattress box (B) by sedimentation and are removed.

Since the conical polymer filter F1 has a helical space defined between the film strip and the film strip in the longitudinal direction of the conical body, the external force due to the flow pressure of the fluid or the proximity of the polymer filter F1, The outer shape of the conical body is elastically deformed and restored to the left and right, up and down and inside and outside as shown in FIG. 4B. Such elastic deformation acts to move the surface of the cone through the space and space to smoothly float the coalesced oil component, to shake out the solids attached to the surface of the cone, thereby minimizing the adhesion of the solids, So that it is possible to smoothly drop the liquid to the lower portion of the mattress box (B).

Hereinafter, the filtration mechanism by the conical floating polymer filter (collector) of the present invention will be described in detail.

<Sedimentation mechanism of the hollow inside the filter (trapper)>

The mechanism of precipitation of hollow inside the conical floating polymer filter (F1: collector) of the present invention is explained in detail with reference to FIGS. 4D to 4G.

That is, a conical floating polymer filter (F1: collector) filled in the mattress box (B) collides with an external fluid having an upward flow rate. At this time, the fluid is dispersed by the water, and the flow of the upper layer, in which the water is deflected into the hollow inside the collector, is changed to create a transition flow state and a laminar flow state, thereby precipitating the high density particles.

A turbulent external upflow fluid containing solids and emulsion oil particles collides with the trapper to disperse the water stream into the lumen of different radii between the cone nodes. At this time, the flow rate of the upper part of the polymer filter (collector) due to the conical internal space and the upward and downward flow of the polymer filter (collector) is reduced and changed into the laminar flow state. In the turbulent state, By the law, it is sedimented in the inside and the top of the conical hollow so that the particles to be removed are trapped and filtered. In addition, the filter passes through a filter (trapper) connector and a mattress layer entangled in a loop of 4 to 10, preferably 5 to 7, loops formed in a polymer filter (collector) (Collectors) and adhered to the polymer filter (collector) by deposition. These conical floating polymer filters create a stratified flow space between the hollow and single collectors of the conical concentric circles to effectively distribute the upward fluid flow to effectively induce a laminar flow region within the polymer filter (collector) Is collected and filtered.

<Oil separation and oil separation in continuous operation filtration process>

The oil separation and oil separation mechanism of the continuous operation filtration process by the conical floating polymer filter (F1: collector) of the present invention is explained in detail with reference to FIG. 4H to FIG. 4J.

In other words, the solids and emulsion fractions contained in the upflow turbulent fluid have a mechanism of hydrodynamic, diffusion, sedimentation, adhesion by inertial force (inertial collision), interception (HDPE) elastic collector, filtered and fixed, and is discharged to the bottom of the filtration tank through the process of air backwash, and is discharged like the backwash process of the system.

<Oil separation and backwashing of the initial excellent filtration process>

The water separation and backwash separation mechanism of the initial excellent filtration process by the conical floating polymer filter (F1: collector) of the present invention is described in detail with reference to FIG. 4k.

That is, the emulsion state oil contained in the fluid does not easily join in the droplet state. The emulsion oil is diffused into the Brownian motion by the flow velocity. The removal of oil in the water emulsion state is carried out on the outer wall of a polymer filter (sorbent) having a hydrophobic property in a laminar flow state of a high density polyethylene (HDPE) elastic trapper hollow, and a polymer filter I) Make droplets on top. The hydrophobic nature of the oil and the hydrophobic nature of the conical floating polymer filter (sorbent) are more lipophilic than water. Polymer filter (sorbent) The oil adsorbed on the outer wall is characterized by the water splitting which is merged into the droplet state and the oil fraction is increased and discharged to the outside of the polymer filter (collector) by the specific gravity difference with water. However, since it is necessary to discharge the particulate matter through the backwashing process within 48 hours after the end of rainfall in the initial excellent filtration treatment, the desorbed water is discharged by desorbing the droplet state oil adhered to the backwash water together with the desorbed water.

Hereinafter, the present invention will be described in more detail with reference to test examples. However, the following test examples are for further illustrating the present invention, and the scope of the present invention is not limited by the following test examples. The following test examples can be appropriately modified and changed by those skilled in the art within the scope of the present invention.

Test Example 1: Oil separation performance and solids removal performance evaluation

In order to confirm the water separation performance and the solids removal performance of the conical floating polymer filter (F1) of the present invention, a lab scale filtration apparatus was manufactured. The filtration apparatus was filled with the polymer filter (F1) of the present invention. As shown in the table below, the artificial early storm used in the experiment was separated into 1000 μm, 180 μm, 100 μm, and 45 μm particle sizes as shown in the table below, 15% for 1000 μm to 180 μm, The artificial sample conditions of the TARP protocol of the TARP protocol known as NJDEP / NJCAT TARP of the American Society of Civil Engineers were prepared by mixing 25% of 180 탆 to 100 탆, 15% of 100 탆 to 45 탆 and 45% of 45 탆 or less , Dried in a dryer for 24 hours, and mixed with tap water to prepare an artificial early storm having a solid concentration of 600 mg / L and a NH concentration of 100 mg / L

The artificial initial stormwater (wastewater) was flowed into the treatment tank by changing the residence time using a metering pump (Masterflex Pump). The n-hexane extract and SS (Suspended solids) of the samples taken from the inlet and outlet are analyzed according to the Water Pollution Process Test and Standard Methods, and the results are shown in Table 1 below.

In addition, as a comparative example, the filter shown in Fig. 5 is a cylindrical floating polymer filter that has been disclosed in the prior art, and the test is carried out under the same conditions as above using a cylindrical floating polymer filter that has been disclosed in the past, The results are shown in Table 1 below.

ingredient inflow
(M3 / h) Example (conical floating polymer filter) Comparative Example (Cylindrical Floating Polymer Filter) Artificial influent
(mg / L) Effluent
(mg / L) Treatment efficiency
(%) Influent
(mg / L) Effluent
(mg / L) Treatment efficiency
(%) n-Hexane
extract 0.1 100 10.1 89.9 84.5 4 4.7 94.4 0.2 100 6.9 93.1 102.9 5.3 94.8 0.3 100 5.2 94.8 81.5 5.9 92.8 0.6 100 3.4 96.6 86.7 12.5 85.6 0.9 100 2.5 97.5 86.2 26.2 69.6 Floating
Shape 0.1 600 48.8 91.8 1082 52.3 95.2 0.2 600 36.4 93.9 1250 73.5 94.1 0.3 600 32.5 94.6 1320 103.2 92.2 0.6 600 29.2 95.1 1530 135.7 91.1 0.9 600 23.7 96.0 1450 194.8 86.6

From the test results shown in Table 1, it was confirmed that the conical floating polymer filter F1 of the embodiment of the present invention provides a very excellent filtration effect as compared with the cylindrical floating polymer filter of the comparative example.

Therefore, the conical floating polymer filter of the present invention can be applied to the sedimentation, inertia force, inertia force, and interception of the physical fluid mechanism between the contaminant particles contained in the initial rainfall and the collector (filter) ) And diffusion can be effectively induced, so that it is possible to effectively remove solid matter and oil fractions of various particle diameters contained in the initial rainwater.

Hereinafter, the process of reducing nonpoint pollutants included in the rainwater through the infiltration trench according to the present invention will be described.

As shown in FIGS. 1 to 4, when the non-point pollutants contained in the rainwater are removed through the infiltration ditch according to the present invention, first, when the rainwater flows into the precipitation tank 1, As the sedimentation tank 1 is filled, submerged solids of the non-point pollutants contained in the storm are submerged. The stormwater introduced into the settling tank 1 passes through the upper portion of the box filtration portion F constituting the vertical filtration means 2 and contacts the plurality of polymer filters F1, (Inertial collision), blockage and diffusion phenomena induced by sedimentation, inertial force, physical fluid mechanism between the contained particulate and polymer filter (F1) are effectively induced, whereby solid matter and oil of various particle sizes included in the rainfall are primarily removed do.

The supernatant purified in the box filtration section F of the vertical filtration means 2 flows into the upper portion of the horizontal filtration means 4 through the fine discharge port 13 of the sedimentation tank 1.

The rainwater that has flowed into the upper portion of the horizontal filtration means 4 sequentially passes through the gravel layer 47, the upper water permeable sheet 46, the gravel layer 45 and the gravel layer 44 in order, And then flows into the box filtration section F constituting the horizontal filtration means 4 and is moved from the upper part to the lower part. As a result of the process of contacting the plurality of polymer filters F1 through the lower portion of the box filtration portion F as described above, the physical fluid mechanism between the pollutant particles contained in the polymer and the polymer filter F1 (Inertial collision), blockage, and diffusion phenomenon are effectively induced, whereby solids and oil fractions of various particle diameters contained in the rainbow are secondarily removed.

Next, the rainwater that has been secondly filtered through the box filtration unit F constituting the horizontal filtration means 4 is finally filtered through the sand layer 41, and is then permeated into the ground.

Therefore, according to the present invention, the stormwater introduced into the settling tank 1 is moved from the lower part to the upper part and brought into contact with the plurality of polymer filters F1 to filter the stormwater, and only the filtered water is supplied to the horizontal filtration unit 4, The time of contact between the stormwater introduced into the sedimentation tank 1 and the polymer filter F1 is prolonged to improve the filtration effect of stormwater supplied from the sedimentation tank 1 to the horizontal filtration means 4, It is a useful invention that can further improve the abatement effect.

In the present invention, even when the inflow amount of stormwater is small, the stormwater is introduced into one side of the horizontal filtration means 4 in the settling tank 1, and the inflow stormwater is introduced into the gravel layer, the box filtration portion F and the sand layer 41 It is a useful invention for improving the effect of reducing the nonpoint pollutants included in the rainfall even when the inflow amount of rainwater is small.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is clear that the present invention can be suitably modified and applied in the same manner. Therefore, the above description does not limit the scope of the invention defined by the limitations of the following claims.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the present invention.

1: settling tank
11: Grating
12:
13: Outlet outlet
2: vertical filtration means
21: Case
211: a front vertical plate, 212: a rear vertical plate,
213: one-side vertical plate, 214: fine inflow hole
3: Underground depression
31:
4: Horizontal filtration means
41: sand layer
42: Lower permeable sheet
43: Covering pitch sheet
44: Perimeter gravel
45: laminated gravel layer
46: Upper permeable sheet
47:
F: box filtration section
F1: Polymer filter
B: Matrix box
B1: Lower perforated plate, B2: Perforated plate, B3: Front perforated plate,
B4: rear porous plate, B5: upper porous plate, H: water passage hole
T1: T-shaped groove, T2: T-shaped protrusion, J1: Tapped hole, J2: Assembly hole,
J3: Fixing bolt

Claims (16)

A sedimentation tank 1 in which an upper part is buried in the ground to be exposed, a grating 11 is provided in an upper part, an inlet 12 is connected to an upper part of the grill, and a storm drain 13 is formed in an upper part of the grill 11; And is provided perpendicularly to the other side of the sedimentation tank 1 to move the storm introduced into the inlet 12 from the lower part to the upper part to contact the plurality of polymer filters F1 to filter the storm water, Vertical filtration means (2) for discharging to the storm drain (13); An underground depression (3) formed in the ground on the other side of the settling tank (1) so as to be depressed in the left and right direction and grounded on the other side, and a drainage unit (31) Horizontal filtration means 4 installed inside the under-ground depression 3 for re-filtering the storm that flows into the upper portion of one side through the storm drain 13 and penetrating into the underground of the under-depression 3, &Lt; / RTI &gt;
The horizontal filtration means 4 includes a sand layer 41 filled in the lower part of the underground depression 3, a lower permeable sheet 42 laminated on the sand layer 41, , A box filtration part (F) which is installed with a peripheral spacing space on the upper part of the upper part and the lower part and discharges the non-point pollutant contained in the storm, which is moved from the upper part to the lower part, through the polymer filters (F1) A cover gauze sheet 43 surrounding the top and periphery of the perimeter gaps F and a perimeter gravel layer 44 filled in the perimeter space; And a gravel layer (45). The natural penetration ditch for reducing non-point pollution.
The method according to claim 1,
The vertical filtration means (2)
A case 21 which is provided on the other side wall of the settling tank 1 so as to communicate with the storm drain 13 and flows into the upper portion of the inner portion of the sedimentation tank 1,
A box filtration part F provided inside the case 21 to filter the non-point pollutants contained in the rainwater which is transported from the lower part to the upper part through the polymer filters F1 and discharge the same to the rain water discharge port 13;
Characterized in that the natural penetration ditch for the reduction of non-point pollution.
3. The method of claim 2,
The case (21)
The front and rear vertical plates 211 are fixed to the front and rear sides of the outflow outlet 13 formed on the other side wall of the settling tank 1 so as to protrude to one side and the lower ends thereof are tightly fixed to the lower surface of the settling tank 1 212,
One side plate 213, which is integrally connected to one end of the front and rear vertical plates 211 and 212 and has a bottom inflow hole 214 formed therein,
Characterized in that the natural penetration ditch for the reduction of non-point pollution.
delete The method according to claim 1,
The horizontal filtration means (4)
An upper permeable sheet 46 stacked on top of the laminated gravel layer 45,
A pinhole layer (47) laminated on the upper portion of the upper water permeable sheet,
Characterized in that it further comprises a natural penetration ditch for the reduction of non-point pollution.
3. The method of claim 2,
The box filtration section F
And a plurality of matrix boxes (B) filled with polymer filters (F1) therein.
The method according to claim 6,
The matrix box (B)
A lower perforated plate B1 in which T-shaped grooves T1 are formed in the longitudinal direction on both sides and a plurality of water passage holes H are formed;
And a lower T-shaped protrusion T2 is inserted into both T-shaped grooves T1 of the lower perforated plate B1 in a sliding manner, A side perforated plate B2 on which a plurality of water through holes H are formed;
T-shaped grooves T1 formed on both sides of the inner side facing each other and T-shaped grooves T1 formed on both inner side surfaces of each of the T-shaped grooves T1 positioned on both sides of the side perforated plate B2 (B3) and (B4), respectively, which are slidably inserted into the T-shaped protruding portion (T2) positioned at the rear side and each having a plurality of water passage holes (H);
A T-shaped groove T1 is formed in a longitudinal direction on both lower sides thereof, and both T-shaped grooves T1 are slidably inserted into T-shaped projecting portions T2 of both side porous plates B2, An upper perforated plate B5 having a water passage hole H formed therein;
Characterized in that the natural penetration ditch for the reduction of non-point pollution.
8. The method of claim 7,
One tab hole J1 is formed on the front perforated plate B3,
An assembly hole J2 is formed in the upper perforated plate B5 at a position corresponding to the tap hole J1,
Wherein a fixing bolt (J3) is fastened to the assembly hole (J2) and the tap hole (J1) through a natural penetration groove for reducing non-point pollution.
9. The method according to any one of claims 6 to 8,
The box filtration part F provided in the case 21 is formed by vertically stacking the matrix boxes B in the form of a vertically long rectangular parallelepiped,
The box filtration part F provided on the lower water-permeable sheet 42 is formed in the shape of a rectangular parallelepiped which is horizontally long horizontally by continuously combining the matrix boxes B in front, back, left, Natural penetration ditch for nonpoint pollution reduction.
3. The method of claim 2,
The polymer filter (F1)
Characterized in that the high density polyethylene (HDPE) film strip is constituted by a conical floating polymer filter formed by spirally winding, and a natural penetration ditch for the reduction of non-point pollution.
11. The method of claim 10,
Characterized in that the conical filter is manufactured by winding a high density polyethylene (HDPE) band spiral four to ten times.
11. The method of claim 10,
Wherein the conical filter is a natural penetration ditch for reducing non-point pollution characterized by high density polyethylene (HDPE) bands partially overlapping or non-overlapping.
13. The method of claim 12,
Wherein the inner space of the conical filter and the outer space are communicated by a helical space when the high density polyethylene (HDPE) band is in a dry form so as not to overlap.
11. The method of claim 10,
The high density polyethylene (HDPE) band having one end relatively wide in width and the other end having a relatively narrow width, and a taper having a width gradually narrower from the one end having a relatively wide width toward the other end having a relatively narrow width Type penetration ditch for the reduction of non-point pollution.
11. The method of claim 10,
The high density polyethylene (HDPE) band has one end which is relatively thick in thickness and the other end which is relatively thin in thickness and which gradually decreases in thickness from one end of a relatively thick thickness toward the other end which is relatively thin in thickness A natural penetration ditch for the reduction of non-point pollution.
11. The method of claim 10,
Wherein the conical filter is elastically deformed to left and right, up and down, and inside and outside, and has a deformation restoring force.

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