KR100629151B1 - Mult-filtering facility for primary rain water - Google Patents

Abstract

The present invention relates to a multiple filtration facility that separates the high initial rainwater generated during rainfall in the development zone and filters it by powerlessly. More specifically, an initial rainwater separation manhole is installed on a rain pipe or a water channel, It is a multi-filtration facility installed adjacent to each other. In the multi-filtration facility, a multi-filtration device consisting of a void screen wall and a vertical two-stage filter is installed, and the rainwater separating manhole and the multi-filtration facility are connected to the initial excellent separation pipe during rainfall. The present invention relates to an initial excellent multi-filtration facility in which contaminated initial rainwater flows into a natural first run into a first-come-first-served multi-filtration facility to filter contaminants or suspended matters several times and then discharge the filtered water to the natural runoff.

Multiple filtration, filter, manhole, discharge pipe, air gap screen wall, backwash system

Description

Mult-Filtering Facility for Primary Rain Water

1 is a perspective view of the initial excellent multi-filtration facility and the initial excellent separation manhole installation of the present invention

2 is a plan view of a multi-filtration facility according to the present invention

3 is a cross-sectional view taken along the line A-A of FIG.

4 is a cross-sectional view taken along line B-B of FIG.

Figure 5 is an exploded perspective view of the vertical two-stage filter in accordance with the present invention

FIG. 6 is a longitudinal cross-sectional view of the vertical two stage filter of FIG. 5 assembled; FIG.

7 is a cross-sectional view of the filter medium filled in the filter wall filter in FIG.

8 is an exploded perspective view of the void screen wall and the screen holder according to the present invention;

11 is a cross sectional view of another second embodiment according to the present invention;

12 is a cross-sectional view taken along the line D-D of FIG.

Figure 13 is a cross sectional view of another third embodiment according to the present invention.

14 is a cross-sectional view taken along the line E-E of FIG.

15 is a cross sectional view of yet another fourth embodiment according to the present invention;

16 is a cross-sectional view taken along the line F-F of FIG.

※ Explanation of symbols used in main part of drawing

10: Initial excellent separation manhole 11: Rainwater inlet pipe

12: Rainwater outflow line 13: Initial excellent separation pipe

20: Multiple filtration facility 23: Pretreatment space

24: filtration space 25: settlement

                   40: air gap screen wall

41: screen holder 42: air gap screen

43: steel pipe 50: vertical two-stage filter

60: star filter 61a: top panel

61c: lower plate 61d: column

61e: cover 62: filter screen

64: backwash 64a: body

64b: water spray nozzle 64c: washing water supply pipe

70: Filtrate Anchor 71: Border Wing

72: inner cylinder 73: capture space

74: filter binding hole 80: filter wall filter

81a: upper plate 81b: lower plate

81c: pillar 82: filter network

83: media 90: sump

91: discharge pipe 92: iron plate

93: cover 94: media filling hole

The present invention relates to a multiple filtration facility that separates the high initial rainwater generated during rainfall in the development zone and filters it by powerlessly. More specifically, an initial rainwater separation manhole is installed on a rain pipe or a water channel, It is a multi-filtration facility installed adjacent to each other. In the multi-filtration facility, a multi-filtration device composed of a void screen wall and a vertical two-stage filter is installed. The present invention relates to an initial excellent multi-filtration facility in which contaminated initial rainwater flows into a natural first run into a first-come-first-served multi-filtration facility to filter contaminants or suspended matters several times and then discharge the filtered water to the natural runoff.

Rainfall runoff from the development zone includes various types of pollutants, such as soils and contaminants, organic and inorganic large and small particulate pollutants, and dissolved pollutants, depending on the characteristics of the catchment surface.

Complete water quality protection in public waters requires the removal of all pollutants from all stormwater containing pollutants. However, this requires a large scale of purification facilities and is costly. Purification is economical and in order to purify all pollutants contained in rainwater, a method is needed to prevent the adverse effects of the sewage treatment plant first, and then to remove any contaminants and floating contaminants. Since soluble contaminants must be removed, the cost of installing and operating the purification facility is high, thereby increasing the economic burden.

In such a situation, it is necessary to separate the initial rainwater with high pollution and to effectively remove impurities and fine particulate contaminants, while minimizing the adverse effects of the soil contained in the initial rainwater at low cost.

At present, the method of removing contaminants and fine particulate matter contained in rainwater in developing areas, such as urban areas, has been used to purify by non-power by installing sedimentation facilities or filtration facilities in adjacent areas on sewage pipes and waterways.

However, in the sedimentation method, the water flowing into the sedimentation basin flows out into the overflowing method, so that the rainwater flows into the sedimentation basin as well as the initial excellent rainfall. Therefore, if a large flow rate flows, the residence time is shortened and the sedimentation efficiency becomes worse. In addition, large amounts of soil and sediment flowing with a large flow rate enter the sedimentation basin.

In addition, in the sedimentation method, in order to increase the sedimentation effect, the facility size should be large enough to secure the residence time.However, this requires a large site and a lot of facility costs.In addition, the sedimentation method has a bad smell due to the decayed water in the sedimentation basin. There is a risk of pests or pests, it is difficult to dredge the sediment sludge, such as soil inflow in large quantities, and difficult to maintain such as dredged sludge dewatering.

Therefore, in urban areas, due to the difficulty of securing the site and excessive facility cost compared to the treatment effect, it is not possible to install a sedimentation site of sufficient size and install small mandibular settlements in the form of manholes on sewer pipes, but these facilities have very short residence times. Heavy particles are precipitated, but small organic pollutants, which are the major causes of water pollution, are hardly precipitated, so the water purification effect is very low, and maintenance such as dredging of sedimentary soil is difficult.

On the other hand, as an excellent filtration method, a filter tank is made of concrete, steel, etc., and a horizontal filter layer is made of particulate media such as sand, or a cylindrical filter filled with filter media is used to filter contaminated rainwater. The sand filtration system cannot secure the filtration area larger than the floor area, and the cylindrical filtration method installs the overflow port inside the filtration tank. And maintenance should be carried out frequently, since contaminants enter the filtration tank and they block the filtration surface, shortening the duration of filtration.

In addition, the filtration method can filter even small particle contaminants by reducing the particle size of the media and increasing the depth of the filtration layer. However, the disadvantage of this method is that the filtration layer has a small pore size and a deep depth of the filtration layer. As the speed is small, the size of the filtration facility increases according to the amount of contaminated water to be purified, so the filtration effect is good compared to other methods, but it is difficult to secure the site, the facility cost is high, and also in terms of maintenance, Since backwashing is not possible, the surface of the filter layer is dredged or the filter layer needs to be replaced with a new one.

On the other hand, in the "apparatus for separating solids from the liquid fluid" registered in the patent 0331594 proposes a method for separating solids from storm storms.

The method uses a screen called a honeycomb-type panel with a filtering function in the waterway between the inflow and outflow pipes in the installation of a water channel having a filtration function and a rectangular structure having a sedimentation function in a rainwater outflow channel. By installing it inclinedly, the water flows out into the air gap of the panel, and the solids, that is, the contaminants are caught on the panel, and the contaminants are pushed into the running water and are separated into a space having a settling function.

① As the panel itself acts as a wall, it must be strong to withstand the flow of running water, and the thickness of the panel is thickened because the pore direction of the panel must be inclined with the direction of water flow, and thus the size of the panel cannot be made small. Solids are less filtered and less effective in water purification.

② Since the panel in charge of filtration is installed in a flat structure within the structure, the filtration duration formed by the panel cannot be made larger than the size of the structure, so the filtration duration is short.

③ As time goes by, various kinds of contaminants may block the pores of the panel. If it is blocked, it is difficult to clean the pores because the pores are in the form of a honeycomb, and it is also difficult to exchange and install the new panel because the panel is firmly installed as a wall.

④ The sedimentation space is in the form of sedimentation basin. The water filled in the sedimentation basin may cause odor or pests. The dredging sludge is difficult to dredge, and the dredged sludge should be dewatered and reclaimed.

An object of the present invention, which is devised to solve the above problems, is to effectively separate and remove contaminated initial rainwater in the contaminated rainwater that occurs in the development area, and to effectively filter economically and effectively the contaminants and suspended solids. Increasing the maintenance frequency to lower the maintenance frequency and backwashing the filter surface provides an excellent initial multiple filtration device for easy maintenance.

In order to achieve the above object, the present invention, while installing the initial rainwater separation manhole on the rainwater pipe or waterway flowing contaminated rainwater and install a multiple filtration facility without the overflow water outlet adjacent to the manhole but decomposable prefabricated inside the multiple filtration facility The object is achieved by installing a vertical two-stage filter consisting of a pore screen, a wide filter area and a back filter capable of backwashing, and a filter wall filter filled with a filter medium attached to the bottom of the filter.

Hereinafter, with reference to the accompanying drawings an embodiment of the present invention will be described in detail.

As shown in Figures 1 to 8, the initial excellent multi-filtration facility 20 of the present invention is installed together with the initial excellent separation manhole 10 and the initial excellent multi-filtration facility 20 is a large concrete concrete structure voids therein By installing the screen wall 40 and the vertical two-stage filter 50, it is possible to secure a large filtration area at a low cost in a small area.

The initial excellent separation manhole 10 has a rectangular or circular manhole shape and connects the rainwater inlet pipe 11, the rainwater outlet pipe 12, and the initial excellent separation pipe 13, but the rainwater inlet pipe 11 and the rainwater outlet pipe ( 12) is installed at the same height or the rainwater discharge pipe 12 is installed low and the initial excellent separation pipe 13 is installed lower than the rainwater discharge pipe 12 to introduce the initial rainwater to the first-come first-served multiple filtration facility (20). .

Initially excellent multi-filtration facility 20 is first installed concrete concrete structure, and then install a multi-filtration device consisting of a prefabricated air gap screen wall 40 and a vertical two-stage filter 50 in the concrete structure.

Concrete concrete structure is hollow hollow cube or cylindrical form made of concrete is connected to the initial excellent separation pipe 13 and the discharge pipe 91, but by not installing the overflow water outlet, the superiority beyond the filtration capacity does not flow into the structure.

The multi-filtration device composed of the void screen wall 40 and the vertical two-stage filter 50 is a facility in which the void screen wall 40 and the vertical two-stage filter 50 are installed inside a rectangular or circular concrete structure. Is used as a pre-treatment space 23 for capturing and filtering soil and contaminants by installing a void screen 42 by blocking the wall with a screen with voids and filtering the soil. The multi-stage filtering system 20 is installed three-dimensionally by installing a vertical two-stage filter 50 composed of a star-shaped star filter 60 having a large filtration area and capable of backwashing, and a filter wall filter 80 suspended below the filter. As shown, the pretreatment space 23 and the filtration space 24 are connected in a planar manner, and in the filtration space 24, the star filter 60, which is a vertical two-stage filter 50, and the filtration wall filter 80 are connected up and down. Large filtration area but small site Less yo

The pretreatment space 23 is a facility for capturing soil or contaminants in the influent and reducing the filtration burden of the star filter 60 at the front of the vertical two-stage filter 50 as a void screen 42 on the inlet side of the structure. Install a wall to secure the space, but the height of the bottom of the pre-treatment space (23) slightly higher than the filtration space (24) so that the soil or contaminants are caught on the screen to remain on the floor and the water exits the void screen (42).

The bottom of the pretreatment space 23 is made by filling the base concrete on the bottom of the concrete concrete structure, but is filled with the bottom of the filtration space 24.

As shown in FIG. 8, the void screen wall 40 is fixed to the screen holder 41 on both walls between the pretreatment space 23 and the filtration space 24 as a primary filtration facility in a multiple filtration device. It is a wall-type screen that traps and filters out debris.

The screen holder 41 is made of a grooved plate into which the void screen wall 40 can be fitted from above, and is fixed by using bolts or the like on both sides of the wall or directly made by digging a groove in the concrete wall.

The air gap screen wall 40 is composed of the air gap screen 42 and the steel pipe 43 fixing the air gap screen 42. The air gap screen 42 is manufactured by dividing the air gap screen 42 into small pieces to facilitate assembly and disassembly during installation and maintenance. As the height of the wall is delayed in maintenance work such as cleaning the pretreatment space, and the air gap screen is clogged with soil or contaminants, the pretreatment space has a sedimentation basin function. Set it.

The void screen wall 40 is a one-way straight screen or grid screen, perforated plate type made of wedge-shaped sticks, round rods, etc., which are hardly corroded in consideration of the type and quantity of soil to be removed and contaminants, economy, and maintainability. Reinforce the outer part with angle, angle pipe, flat iron, etc. using a screen to make a square shape.

Although it can be used directly by the void screen wall 40 only, the pore size is smaller than the void screen and flexible and durable synthetic fiber or stainless steel filter cloth, filter net, etc. may be attached to the void screen wall.

The filter cloth attached to the pore screen wall 40 is made to be easily detachable and attached during washing and exchange installation. However, the filter cloth has a small pore size and dense non-woven fabric type to capture soil and sand on the bottom side, and floating on the upper side. It is effective to use a grid filter with a slightly larger pore size for trapping contaminants.

The initial rainwater introduced into the pretreatment space 23 is the air gap in the pore wall, but the water falls out, but the earth and sand are trapped by the screen and captured. (23) is in the form of a sedimentation basin, from which it flows over the top of the pore wall.

However, when the rainfall is over and the time elapses, the water stored in the space falls into the fine pores of the pore wall and is drained in the pretreatment space, and the remaining sludge is dried.

Therefore, the pretreatment space 23 is a facility having a filtration function or a sedimentation function, so that the sediment and contaminant trapping ability due to the filtration function is large, so that the pretreatment space 23 and the void screen wall 40 are dredged and cleaned occasionally during rain. Good to do.

The filtration space 24 is a secondary and tertiary filtration place for filtering most of the suspended solids and fine particulate contaminants contained in the initial rainwater, and the filtration filter 60 protruding upward from the bottom and the filtration suspended from the lower part of the filter. A vertical two-stage filter (50) consisting of a wall filter (80) is installed, and the vertical two-stage filter (50) is installed on the sump (90) for collecting the filtrate, but the sump is collected using the filter strainer (70). (90) It is supported in the upper end and installed in a floating state in the sump, as shown in Figure 5, these filters are in the column (61d) of the star filter and the column (81c) of the filter wall filter (80) Combining the filtering nets 62 and 82, respectively, the filtration area is larger than other methods, but the cost is low.

Water introduced into the filtration space 24 through the pretreatment space 23 is filtered through the side of the star filter 60 and collected into the filter and flows into the filtration wall filter 80 underneath. It is filtered from the inside to the outside is collected in the sump (90) of the outer portion is discharged to the outside.

The process of installing the vertical two-stage filter 50 is as follows.

As shown in FIGS. 2 to 4, first, in the concrete concrete structure of the multi-filtration facility 20, a collecting container 90 having a discharge pipe 91 attached to the bottom of the filtration space 24 is placed on the periphery of the collecting container. Is filled with concrete, etc., so that the bottom height of the filtration space 24 and the pretreatment space 23 is equal to or slightly higher than the height of the sump, and the upper portion of the sump 90 is installed so that the filter can be installed in the sump 90. Star filter (70) with a rim wing 71 can be made and a filter wall filter (80) that can be suspended below the settling to make a hanging in the lower part of the settling container and put it in the sump (90) 70) to install a vertical two-stage filter (50) by placing the star filter (60) on the top.

As shown in FIG. 5, the sump 90 is a cylindrical or rectangular shaped tubular water collection space and serves as a base of the vertical two-stage filter 50, which is not easily corroded to stainless steel or plastic. It is made of material or the concrete itself to create an empty space to create a sump and connect the discharge pipe 91 for discharging the filtered water to the outside of the structure.

The sump (90) is sized to accommodate the filtration wall filter (80) and to collect and discharge the filtrate, thereby limiting the size of the structure.

However, to deepen the sump 90 and increase the filtration wall filter 80 to increase the filtration area, lower the height of the structure to directly use the bottom of the structure as the bottom of the filtration chamber, drill a hole in the bottom of the structure, and cut the ground. After making the sump (90) with the discharge pipe 91 is attached to this hole.

The star filter 60 at the front of the vertical two-stage filter 50 is a cylindrical filter having a filtration surface of a plane curved in a star shape, and has a larger filtration area than the cylindrical filter and is installed at the bottom of the filtration space. It is a structure that is filtered at the immersed side according to the water level of the filtration space and the filtered water flows downward through the central space, and also supplies a pressure water into the filter to backwash the contaminants caught in the filter network.

Referring to the manufacturing and installation process of the star filter 60 is as follows.

The star filter 60 is a filter in which a side portion is blocked in a star shape using a filter cloth or a filter net in a three-dimensional cylindrical structure made of a predetermined size having a star-shaped planar structure. Virtually set a small circle and place outer vertices and inner vertices so as to form stars on the outer circle and the inner circle, and have the same shape as the upper plate 61a and back plate 61a with backwashing holes. After making the attached lower plate 61c, place the two plates at a certain interval and place each vertex to correspond to each other, and then join the round and thin steel pillars 61d to each vertex by welding, etc. to make a solid three-dimensional filter frame. Continuously pass the synthetic fiber filter cloth or the filter cloth 62 between 61d and the column height and suture the filter cloth with tension. If the formation through the column so that the filtering surface star-shaped metal material blocking the filtering net, for example by welding and is covered with a cover (61e) in the upper plate (61a).

The star filter 60 is a filter having a filtration surface and a central space formed in a star shape, and the water is immersed or overflowed in the water and collected by filtration from the outer surface of the filter to the center to drain the water to the lower collecting well.

When the star filter is viewed in plan, the star filter has a protruding outer vertex and a recessed inner vertex, and the outer vertex is located at equal intervals on the outer circle from the center of the circle, and the inner vertices are also at regular intervals on the inner circle.

In a straight line extending radially from the center of the circle to the outside, the position of the outer vertex is located in the middle between two equally spaced inner vertices.

On the other hand, the size of the particulate matter removable in the filtration is determined according to the size of the pores.

The smaller the pore size, the smaller the size of particulate matter is removed, so that the water quality is clearer. On the contrary, the amount of particulate matter removed on the filter surface accumulates so that the air permeability of the filter media is impaired, which shortens the useful life of the filter cloth.

Therefore, in filtration, it is important to sufficiently secure the filtration area so that the pore size of the filter cloth is reduced to clean the water quality while securing the required amount of filtration water so that the surface is not frequently washed.

The method of maximizing the filtration area in the star filter 60 is to form a multi-faceted surface by making as many vertices as possible, and the size of an inner circle is an important factor in forming a multi-faceted surface. Due to this, various limitations occur, so that the proper interval between internal vertices is set in the inner circle in consideration of the thickness of filter cloth or net, the size and characteristics of the object to be removed, the convenience of installation, and the ease of cleaning. By placing vertices on the circle, the maximum number of filtration surfaces applicable is determined.

In addition, the filtration area is determined according to the size of the inner circle.

As the diameter of the inner circle is smaller in the outer circle of a certain size, the length between the outer and inner vertices becomes longer, thus increasing the filtration area between the two vertices.

However, the number of filter surfaces depends on the size of the inner source, so the larger the diameter of the inner source, the larger the filter surface.

In this situation, the internal filter that can secure the maximum filtration area is half the size of the external circle when the distance between the internal vertices is the same in the star filter with the external source of a certain size. It is half the length between the outer recessed vertices.

The filter cloth or filter net 62 of the star filter 60 uses synthetic fiber filter cloth such as meshes, woven fabrics, nonwoven fabrics, geogrids, or filter nets such as steel screens, stainless steel grids, and perforated plates. It is preferable to make it smaller than the mesh size.

Star filter 60 is a device that removes the most particulate matter in the filtration device of the present invention takes a lot of filter residues in the filtration network 62, so to supply a pressure water to the star filter 60 to remove them easily The filter residue can be removed and this backwashing operation can be done by opening the cover 61e of the star filter 60 and spraying the pressure water directly on the filter surface by manpower or backwashing or spraying nozzle 64b inside the star filter 60. ) Can be automatically backwashed by installing a backwashing device (64) attached thereto and supplying pressure water to the backwashing device (64).

The filter backwashing device 64 is a facility for installing the body 64a having a large number of water spray nozzles 64b attached to the inside of the filter and receiving water from the body 64a from the outside. It is vertically coupled to the cover 61e having a rather small size, and is attached to the cover water by protruding the washing water supply pipe 64c.

The size of the body (64a) in the inner circle to the size that does not interfere with the filtered water communication, and to increase the pressure of spraying, divide the inside of the body into two or three, and each of the washing water supply pipe (64c) in each partition of the upper cover to make each Supply pressure water to the pipe.

When the pressure water supply pipe 64c inside the filter is used as a flexible pressure hose, etc. in the middle of the pipe so as to be separated from the star filter 60 when maintaining the filter, and a coupling, which is easy to bind and separate at the connection part, good.

Star filter settled cylinder (70) is a cylindrical shape of washbasin, and has an inner cylinder (72) projecting upward on the bottom, and has an edge at the upper end so as to fit inside the sump (90), but hangs on the upper jaw of the sump. It is installed in a state where the star filter 70 is placed therein and the filter wall filter 80 can be suspended at the bottom.

As shown in FIG. 5, the star filter settled cylinder 70 is a cylindrical bowl made of steel or the like having an open top and a hole at the bottom thereof, and has an outer edge of the upper surface so as to be caught on the top wall of the sump. There is an inner cylinder 72 protruding upward from the center of the bottom surface, and a hole 74 for binding the filter wall filter outside the inner cylinder.

The star filter 60 is installed in a state in which the filter is placed in the upper chamber of the inner cylinder 70, and the filter is separated and cleaned when the filter network is washed, exchanged, and removed the trapped traps in the filter chamber. The contaminants, etc. of the fruit bottom are trapped in the capture space 73 in the star strainer 70 so that the inner cylinder 72 is protruded, and does not flow into the filtered water collecting container 90.

When installing the filtration wall filter 80 in the lower portion of the separate filter settlement chamber 70, the filtration wall filter 80 is attached by bolts or the like using the binding holes 74 on the bottom surface.

The filter wall filter 80 is coupled to be suspended in the lower portion of the strainer (70) under the star filter (60) is installed in a floating state in the sump (90) to filter the water passed through the star filter (60) Fine suspension that flows into the top of the wall filter 80 and passes through the filter wall composed of the multiple filter nets 82 of the filter wall filter 80 and the porous and adsorptive media 83 filled between the filter nets and is not removed from the star filter. Filtration facility that removes substances and dissolved substances, the filter medium made of stainless steel, plastic, etc., which is hardly corroded, and a multifiltrating net 82 attached to a frame composed of a bottom plate, and a filter material filled between the filter net 82. It consists of 83.

The frame of the filter wall filter 80 has a shape similar to that of the star filter 60, and includes a top plate 81a and a bottom plate 81b without holes for binding the water inlet, the filter filler, and the star filter settle. Arrange them so that they face each other with a certain interval, and set the outer circle and the smaller inner circle based on the center of each plate, and combine the round bar columns (81c) with welding or bolts between the plates at regular intervals from each circle. Make a filter skeleton.

Filter net 82 is installed so as to surround each of the inner circle and the outer circle formed by a round bar column independently to form a double filter net in the inner and outer portions, and then the porous or adsorptive filter media (83) in the space between the filter nets through the filter filling hole. Fill the to form a filter wall and bind the filter using a bolt in the lower portion of the star strainer (70).

In order to make a wider filter wall, a plurality of small sized holes are made to be permeable inside the inner circle of the lower plate 81b, and the lower filter wall is filled by filling a medium with a predetermined thickness on the plate.

The size of the filter wall filter 80 is to be installed in a floating state in the sump (90), but in order to secure a large filtration area to deepen the sump (90) and accordingly the depth of the filter wall filter (80) It can be deepened to secure a large filtration area, and if the sump is deep, it should be discharged to the overflow according to the discharge height into the discharge water.

Another embodiment of the present invention will be described in detail by the accompanying drawings.

<Example 2>

11 to 12 is another second embodiment of the present invention, this embodiment is a method of reducing the construction cost by reducing the size of the concrete concrete structure, by lowering the height of the concrete concrete structure to pretreat the floor of the structure Directly used as the bottom of the space and filtration space, and drills the ground of the structure of the filtration space to excavate the ground to install a filter water reservoir attached to the discharge pipe.

<Example 3>

13 to 14 is another third embodiment of the present invention, which is a method of making the filtration area of the filtration wall filter wider. The bottom surface of the filtration space is filled with concrete without filling the bottom of the filtration space. It is made of steel plate and placed on the base to use the bottom space of the bottom plate as a sump, and through the center part, it puts up a star filter settled space, installs a star filter, and makes the filter wall filter larger than the star filter settle and welds it to the bottom of the bottom plate. It is installed by floating in the catchment space by attaching it by the method such as the above.

<Example 4>

15 to 16 are yet another fourth embodiment of the present invention. This embodiment is a method of applying to an area where a purification site is installed in a narrow area or where there is less soil or contaminants in an initial rainfall. It is possible to omit the screen wall, reduce the size of the concrete concrete structure, and install only the vertical two-stage filter, and increase the processing capacity by installing multiple vertical two-stage filters.

On the other hand, it contains a large number of contaminants, and in the place where the flow rate is large, only the star filter is used in the vertical two-stage filter except for the filter wall filter, and the star filter has a small filter area but can be manufactured in a simple cylindrical shape.

In addition, the concrete relief structure of the multi filtration facility is made of thin and light iron plate, plastic, etc. instead of concrete, and the initial excellent separation manhole is made of the same material and attached to the multi filtration facility to make one structure.

As such, the present invention is not limited to the preferred embodiments of the above-described features, and various changes can be made by those skilled in the art without departing from the gist of the present invention as claimed in the claims.

As can be seen from the above, the present invention can secure a wide filtration area at a small area and at a low cost, and thus, the installation cost of the filtration facility is low. Second, the multi-stage filtration can effectively filter the contaminants and fine suspended matter. Third, the filter residues are dispersed in each filtering facility by filtering the contaminants and suspended solids by size, so the use time of the filtering facility is long, so the frequency of maintenance is low. Fourth, the multi-filter can be easily separated and cleaned from the structure. Maintenance is easy by backwashing this large star filter with no power. Fifth, since the inside of the filtration structure is usually drained and dried, sludge in dry state is generated and the sludge amount is small and final disposal is easy. Sixth, the filtration ability is excellent. Because soil does not flow into the filtering facility, The present invention as easy-to-manage technique is very useful compared with the conventional method.

Claims (17)

Install the initial excellent separation manhole (10) on the rainwater pipe or waterway through which the polluted rain flows, and install the multiple filtration facility (20) connected to the initial excellent inflow pipe (13) from the manhole (10) near the manhole (10). But In the multiple filtration facility 20, a void screen wall 40 is installed at an initial excellent inflow portion to secure a pretreatment space 23, and a filtration space 24 and a star filter 60 and a filtration wall filter are provided in the subsequent filtration space 24. Initially excellent multi-filtration facility, characterized in that the installation of the vertical two-stage filter (50) coupled to the 80, while the discharge pipe 91 is connected to the lower portion of the vertical two-stage filter (50) According to claim 1, wherein the multiple filtration facility 20 is the initial excellent multi-filtration facility, characterized in that there is no overflow water outlet The air gap screen wall (40) is formed by the air gap screen or the air gap screen (42) of the air gap plate, and the outer periphery of the air gap screen (42) is manufactured by reinforcing the steel pipe (43). Excellent multifiltration facility, characterized by The method of claim 1, wherein the air gap screen wall 40 is formed to form a guide groove directly on both inner walls of the structure of the filtration facility 20, or attach a screen guide 41 formed with a guide groove and then fitted into the guide groove Excellent multifiltration facility The method of claim 1, wherein the void screen wall 40 is made of a synthetic fiber or stainless steel filter cloth having a smaller pore size than the void screen 42 and being flexible and durable on the corrosion-free steel screen 42. Early multi-filtration system characterized by the addition of a filtering network 4. The initial superior multi filtration system as claimed in claim 3, wherein the air gap screen 42 is made of only a steel screen which is not corroded. The filter of claim 1, wherein the vertical two-stage filter (50) includes a sump (90), a filtration wall filter (80), a star filter (70), a star filter (60), and a cover (61a) sequentially stacked. Excellent multi-filtration facility characterized in that it is made by combining According to claim 1, wherein the star filter 60 is attached to the upper and lower plates (61a) (61c) having a hole in the center and attached to the filter net 62 to the fixing column (61d) arranged in the form of stars therebetween, Initial excellent multi-filtration facility, characterized in that the backwashing device 64 for washing the filter net 62 between the holes formed in the central portion of the upper plate (61a) is installed 9. The backwashing device (64) according to claim 8, wherein the backwashing device (64) is provided with a plurality of water spray nozzles (64b) at regular intervals in a multi-direction on the pole body (64a), and a cover (61a) on the top of the body (64a). On the other hand, the initial excellent multi-filtration facility, characterized in that the body (64a) and the backwash water supply pipe (64c) is connected through the cover (61a) The filter wall filter (80) according to claim 7, wherein the filter wall filter (80) is formed on the upper plate (81a) and the lower plate (81b), and the fixing column (81c) arranged in two rows in a circle shape in the outer portion and the interior therebetween. ), Excellent initial multiple filtration system characterized by forming a double filter surface The initial excellent multi-filtration system according to claim 10, wherein the filter wall filter (80) fills the particulate filter (83) in the space between the outer portion and the filter network (82) installed therein. delete The method of claim 1, wherein the multi-filtration facility 20 lowers the height of the concrete concrete structure in order to reduce the construction cost to use the bottom of the structure directly as the bottom of the pretreatment space 23 and the filtration space 24, The initial excellent multi-filtration facility, characterized in that through the bottom of the structure of the filtration space 24 to excavate the ground to install a filtered water sump (90) to which the discharge pipe 91 is attached According to claim 1, The multi-filtration facility 20 is made of a thin iron plate 92 of the bottom of the filtration space 24 is placed on the base to use the bottom space of the bottom iron plate 92 as a sump and through the center portion Insert and separate the star filter settle (70), install the star filter (60) and make the filtration wall filter 80 larger than the star filter settle (70), welded and attached to the bottom of the bottom plate 92 to the water collecting space It is installed in a floating state, the initial excellent multi-filtration facility, characterized in that formed by forming a filter filling hole 94 in the bottom plate 92 on the filter wall filter 80 and covering the cover 93 The multi-filtration system (20) according to claim 1, wherein the pre-treatment space (23) and the void screen wall (40) are omitted when the multi-filtration facility (20) is installed in a narrow purification site or in an area where soil or contaminants are small in initial rainwater. Initially excellent multifiltration facility characterized by reducing the size of the concrete structure and installing only a plurality of vertical two-stage filters (50) According to claim 1, wherein the vertical two-stage filter (50) of the multi-filtration facility 20 uses only the star filter (60) except for the filter wall filter (80) in the place containing a large amount of contaminants and the flow rate to be treated Excellent excellent multifiltration facility According to claim 1, The multi-filtration facility 20 and the initial excellent separation manhole (10) is an excellent initial multi-filtration facility, characterized in that the production of any one of a thin and light steel plate or plastic instead of a concrete structure

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