KR20110084080A - Storm water filtering system for selective treatment of storm water runoff and automatic discharge of treatment water residue - Google Patents

Abstract

PURPOSE: A filtering type non-point contaminants processing apparatus is provided to expand the life expectance and maintaining the performance of an upward filtering unit by maintaining the upward filtering unit in the air. CONSTITUTION: A first reaction bath(10), a second reaction bath(20), a discharging bath(30), and a filtering discharging pipe are arranged. A stormwater inlet(11) is arranged at the upper side of the upstream in the first reaction bath. The reaction bath embeds a downward filtering unit, and a primarily processed water discharging pipe is arranged at the lower side of the downstream in the first reaction bath. The second reaction bath is in connection with the primarily processed water discharging pipe, and a secondary processed water overflowing wall is arranged at the downstream of the second reaction bath. The second reaction bath embeds an upward filtering unit. The discharging bath includes a discharging pipe(31).

Description

Storm water filtering system for selective treatment of storm water runoff and automatic discharge of treatment water residue

The present invention relates to a filter type non-point pollutant treatment device capable of selective treatment of rainfall effluent and automatic discharge of treated residual water. More specifically, the initial rainfall effluent containing a large amount of non-point pollutant is a top-down filtration means and a bottom-up filtration means. The effluent runoff is filtered and discharged in several stages and rainfall effluent containing trace amounts of nonpoint pollutants following the initial rainfall is discharged while minimizing the filtration process. The filter is self-washed, and after the rainfall is terminated, the bottom-up filter is not exposed to the contaminated water and remains exposed to the atmosphere, so that its performance is continuously maintained and its service life is extended. Selective runoff for runoff It relates to the treatment and re-filtered residual type boiling point contaminants processing apparatus capable of automatically discharging.

The rainfall characteristics of Korea are various types of rainfall by season, and even in the same rainfall phenomenon, the outflow of pollutants occurs in various forms depending on the characteristics of the watershed. In addition, since most of the pollutants to be treated are included in the initial rainfall, a technique is needed to treat only the initial pollutants and to overflow the rainfall after the discharge of the pollutants is completed.

Conventional non-point pollutant treatment apparatus has a problem that the bottom-up filtration means is immersed in the contaminated water even in the rain, the performance and service life of the bottom-up filtration means is reduced.

In addition, the conventional non-point pollutant treating apparatus filters all of the initial runoff effluent containing a large amount of non-point pollutants as well as rainfall runoff effluent containing a small amount of non-point pollutants continued after the initial rainfall in various stages by a top-down filtration unit and a bottom-up filtration unit. There is a problem in that the capacity of the facility is increased because it is treated and discharged.

In addition, the conventional non-point pollutant treatment apparatus has a problem that the management is cumbersome and the condition of the media is easy to be poor because the administrator has to manually wash the media because there is no function to backwash the upflow filter means.

In addition, the conventional non-point pollutant treatment apparatus has a problem that the installation and replacement of the media is cumbersome because the media are simply stacked.

It is an object of the present invention to maintain the performance of the bottom-up filtration means during the rain, so that the bottom-up filtration means is exposed to the atmosphere without being submerged in contaminated water so that the performance of the bottom-up filtration means is maintained for a long time and the service life is extended. It is to provide a filter type non-point pollutant treatment device capable of automatic discharge.

Another object of the present invention is that the initial runoff effluent containing a large amount of non-point pollutants can be filtered in a number of stages by the downflow filtration means and upflow filtration means, but rainfall effluent water containing a small amount of non-point pollutants continued after the initial rainfall is By minimizing the filtration process to minimize discharge, it is to provide a filtering type non-point pollutant treatment device capable of selective treatment of rainfall effluent and automatic discharge of treated residual water while minimizing facility capacity and maximizing treatment performance for rainfall effluent.

Still another object of the present invention is to allow the upflow filtration means to be backwashed by its own treated water, so that the performance of the upflow filtration means is continuously maintained and the service life is extended. To provide a filterable non-point pollutant treatment apparatus is possible.

Still another object of the present invention is to provide an apparatus for treating non-polluting pollutants capable of selective treatment of rainfall effluent and automatic discharge of treated residual water to facilitate installation and replacement of filtration means.

In order to achieve the above object, the present invention provides a first reaction tank having a rainfall runoff inflow pipe 11 at an upstream side and a first treated water discharge pipe 12 at a downstream bottom thereof and having a built-in downflow filtration means. 10); A second reaction tank 20 having an upstream lower end connected to the first treated water discharge pipe 12, a second treated water overflow wall 21 disposed downstream, and a built-in upflow filtering means; A discharge tank 30 disposed at a downstream side of the second reactor 20 and having a discharge pipe 31 at a lower end of the downstream side; And a filtration discharge pipe 28 provided at a lower end of the secondary treated water flow-flow wall 21 of the second reactor 20 to connect the second reactor 20 and the discharge tank 30. Provided is a filter type non-point pollutant treatment device capable of selective treatment of effluent and automatic discharge of treated residual water.

The present invention includes a first reaction tank having a downflow filtration means and a second reaction tank and a discharge tank having an upflow filtration means, and a bypass tank is provided on one side of the second reaction tank to include a large amount of non-point pollutants. Technology that can meet the conditions according to the rainfall characteristics because only the initial rainfall runoff water is filtered and non-point pollutants are contained, and the rainfall runoff water that is not actually filtered is bypassed without being filtered. As a result, it is possible to process non-point pollutants contained in the initial rainfall runoff without the large capacity of the facility, and to selectively process the initial runoff and subsequent rainfall runoff. It becomes possible to perform the treatment of non-point pollutants efficiently.

In addition, the present invention is to install a simple filter having a filtration function at the interface between the second reaction tank and the discharge tank after the rainfall stops, it is possible to perform a function that can gradually remove the contaminated water remaining in the filter tank after the rainfall.

In addition, the present invention since the upstream filtration means is naturally backwashed by the rainfall runoff water remaining in the upper layer of the upstream filtration means of the second reactor after the rainfall stops, it is possible to efficiently manage the media.

In addition, in the present invention, the downflow filtration means and the upflow filtration means are configured in the form of a cartridge, so that the installation and replacement of the filter medium is simplified.

1 to 10 show a first preferred embodiment of a filter type non-point pollutant treatment apparatus capable of selective treatment of rainfall runoff and automatic discharge of treated residual water according to the present invention.
1 is a perspective view,
2 is an exploded perspective view,
3 is a plan view,
4 is a partial cutaway perspective view taken along the line AA of FIG. 3, FIG.
5 is a cross-sectional view taken along the line AA of FIG.
6 is a cross-sectional view taken along line BB of FIG.
7 to 10 are longitudinal side views showing the operation of the present invention.
11 to 15 show a second embodiment of a filter type non-point pollutant treatment apparatus capable of selective treatment of rainfall runoff and automatic discharge of treated residual water according to the present invention.
11 is a plan view,
12 is a partially cutaway perspective view taken along line CC of FIG. 11, FIG.
13 is a cross-sectional view taken along line CC of FIG. 11;
14 is a sectional view taken along the line DD of FIG. 11,
15 is a longitudinal sectional view showing a backwashing process.

Hereinafter, a filter type non-point pollutant treatment apparatus capable of selective treatment of rainfall effluent water and automatic discharge of treated residual water according to the present invention will be described in detail according to a preferred embodiment shown in the accompanying drawings.

In the embodiment shown in the drawings, the first reactor 10 having the downflow filtration means, the second reaction vessel 20 having the upflow filtration means, the discharge vessel 30, the bypass tank 40, the wall An example including both the vertical vertical oil pipe 16a for the flow and the filtered discharge pipe 28 for filtering the treated water in the lower layer of the second reactor 20 and discharging it to the discharge tank 30 is provided. The combination of the reaction tank 20 and the discharge tank 30 is set as a basic structure, the structure provided with the filtration discharge pipe 28 in the said basic structure, and the structure provided with the upstream vertical hole pipe 16a for the said basic structure, and the said It turns out that it can implement by the structure etc. provided with the bypass tank 40 in a basic structure.

[First Embodiment]

1 to 10 show a first embodiment of a filter type non-point pollutant treatment apparatus capable of selective treatment of rainfall runoff and automatic discharge of treated residual water according to the present invention.

1 to 10 is a filter type non-point pollutant treatment apparatus capable of selective treatment of rainfall effluent water and automatic discharge of treated residual water according to the first embodiment of the present invention shown in FIG. The first reaction tank 10 to discharge the first treated water to the first by downstream flow treatment and the first reaction tank 10 is disposed downstream of the first reaction tank 10 and treated in the first reaction tank 10. The second reaction tank 20 for flowing the treated water into the lower portion and treating the first treated water in an upflow manner and discharging the second treated water upwardly, and installed in a downstream side of the second reaction tank 20, is provided with a second reaction tank. Between one side of the first reaction tank 10 and one side of the discharge tank 30 on one side of the discharge tank 30 and the second reaction tank 20 for storing and discharge the secondary treated water treated in (20). Rainwater outflow water flowing into the first reaction tank 10 is connected to a predetermined level or more It includes a bypass tank 40 for bypassing the rainfall outflow water from the first reactor (10) to the discharge tank (30) when raised to.

The first reaction vessel 10, the second reaction vessel 20, the discharge vessel 30, and the bypass vessel 40 are formed by partitioning a box structure constituting the entire treatment apparatus of the present invention.

The first reactor 10 is disposed on the most upstream side, the second reactor 20 is disposed downstream of the first reactor 10, and the discharge tank 30 is downstream of the second reactor 20. Is placed on the side. In addition, the bypass tank 40 is disposed on one side of the second reaction tank 20.

The first reaction vessel 10, the second reaction vessel 20, the discharge vessel 30, and the bypass vessel 40 are each formed in a box shape having a bottom and four walls, and downstream of the first reaction vessel 10. The wall shares the upstream wall of the second reactor 20, the downstream wall of the second reactor 20 and the upstream wall of the discharge vessel 30 are shared, and the side wall of the second reactor 20 One wall of the pass tank 40 is shared, and the bypass tank 40 communicates with one side of the discharge tank 30 over the whole height.

The first reactor 10 is provided with a rainfall runoff inflow pipe 11 at the upper end of the upstream, the first treatment water discharge pipe 12 is provided at the lower end of the downstream, it is provided in the downflow filter means.

The rainfall runoff inflow pipe 11 is connected to a side or a sump, and is a portion into which the rainfall runoff collected in the side or the sump flows.

1 to 6, the downflow filter means having a large particle size downflow filter layer 13 and a medium particle diameter downflow filter layer stacked from the top inside the first reactor 10 ( 14) and a downflow filter layer 15 having a small particle diameter.

The downflow media layers 13, 14 and 15 may be configured by stacking only the particulate media 13a, 14a and 15a, but the particulate media 13a, 14a and 15a may be formed into the porous container 13b. It is preferable to configure a cartridge type housed in the 14b and 15b so as to facilitate the management of installation and replacement thereof.

Gravel is used as the granular material 13a, 14a, 15a.

In the drawings, an example in which the porous containers 13b, 14b, and 15b are formed of a mesh is illustrated, but it may be configured as a porous plate.

In addition, the downflow filtration means may be composed of only the downflow media layer 13, 14, 15, it is preferable to further comprise a perforated tube 16 through the plurality of holes perforated in the circumferential wall. Do.

The hole tube 16 is buried in the granular media (13a) (14a) and (15a) accommodated in the porous containers (13b) (14b) and (15b) constituting the downflow media layer (13) (14) (15). Is installed in such a way.

The hole tube 16 has a plurality of lower ends protruding from the bottom of the first reaction tank 10 and the upper end protruding upward of the large diameter downflow media layer 13, which is the uppermost layer of the downflow filtering means (in the illustrated example). Four vertically spaced vertical pipes 16a, and horizontally spaced pipes 16b disposed at the bottom of the first reactor 10 in the upstream and downstream directions and connected to the lower ends of the vertically vertical pipes 16a for overflow; Vertically vertical pipes arranged in the left and right directions at the bottom of the first reactor 10 is connected to the left and right ends to the downstream end of the cross-hole pipe (16b) and the middle portion thereof is connected to the primary treated water discharge pipe (12) 16c).

The horizontal hole tube 16b and the vertical hole tube 16c preferably block the end portion of the horizontal runoff pipe 16c so that the rainfall runoff does not flow directly, but flows through the plurality of through holes perforated in the circumferential wall thereof.

The vertical perforated pipe 16c is provided with a connection 17 connected to the primary treated water discharge pipe 12. Preferably, the primary treatment water discharge pipe 12 and the connection part 17 are each configured to form a female thread part 12a and a male thread part 17a so that they can be detachably attached thereto, but are not necessarily limited thereto. .

The second reactor 20 has an upstream side lower end connected to the primary treated water discharge pipe 12, and a downstream side is provided with a secondary treated water overflow wall 21 through which secondary treated water flows out and is discharged. It is provided with upflow filtration means.

1, 2 and 5, the upstream filtration means, the lower end is located at a height spaced apart from the bottom surface of the second reaction tank 20 and the upper end of the second treated water overflow wall (21) and It is configured to include an upflow media layer 22 located at the same height.

In the drawing, the upflow media layer 22 is configured as two left and right, but each of the left and right upflow media layers 22 may be divided into a plurality of back and forth directions.

The upflow media layer 22 may be composed of only the particulate filter 22a, but the particulate filter 22a is configured in the form of a cartridge housed in the porous container 22b to manage its installation and replacement of the media. It is desirable to make it convenient.

Although the drawing illustrates an example in which the porous container 22b is formed of a mesh, the porous container 22b may be formed of a porous plate.

The upflow media layer 22 may be composed of only the particulate filter 22a and the porous container 22b, but preferably includes a vertical oil hole 23 having a plurality of through holes formed in the circumferential wall.

The vertical perforated pipe 23 is installed in a way that is embedded in the granular material 22a in the porous container 22b. The vertical perforated pipe 23 is installed in a state where the lower end is higher than the bottom height of the upflow filter medium layer 22 and the upper end is the same as the top height of the upflow filter medium layer 22.

The upflow media layer 22 and the vertical perforated pipe 23 are fixed to the partition plate 24 across the second reactor 20 to form one unit, and the partition plate 24 is configured as a second reactor. It is preferable that the upflow filter medium layer 22 and the vertical perforated pipe 23 can be installed by attaching to 20).

The partition plate 24 is passed through the through-hole 24a and the upward flow filter layer 22 corresponding to the diameter of the vertical perforated pipe 23 and passed upwardly, and above the upward flow filter layer 22. The water passage 24b through which the treated water flows downward is drilled.

In mounting the partition plate 24 to the second reactor 20, a plurality of gap sleeves (6 in the drawing) are provided between the bottom surface of the second reactor 20 and the bottom surface of the partition plate 24. The screw rod 26 which penetrates the through-hole 24c of the partition plate 24 with 25 is fastened to the nut 27 inserted in the bottom surface of the 2nd reactor 20 can be used. However, the mounting method of the partition plate 24 to the second reactor 20 is not necessarily limited to the method as shown in the example.

The lower end of the secondary treated water flow wall 21 is provided with a filtration discharge pipe 28 for filtering the primary treated water introduced into the second reaction tank 20 to discharge to the discharge tank (30).

The filtration discharge pipe 28 is fitted into a detachable hole 21a which is drilled at the lower end of the secondary treated water overflow wall 21, and is open at both ends of the cylindrical pipe 28a, and the cylindrical pipe 28a. The filter 28b is filled in the interior of the discharge tank 30, and is coupled to the open end and comprises a stopper 28c having a plurality of holes perforated.

The cylindrical tube 28a is preferably installed such that the lowermost end of the inner wall surface thereof is slightly higher than the bottom surface of the second reactor 20 (see " d1 " in Fig. 5).

In addition, a filter net 28d may be installed at the open end of the second reaction tank 20 side of the cylindrical tube 28a.

The filter medium 28b may be a PP-based string filter or a nylon-based string filter.

The discharge tank 30 shares the secondary treated water overflow wall 21 of the second reactor 20, and a discharge pipe 31 is provided at a lower end of the downstream side.

The discharge pipe 31 is preferably installed such that the lowermost end of the inner wall surface thereof is 10 mm higher than the bottom surface of the discharge tank 30 (see "d2" in Fig. 5).

The bypass tank 40 includes an upstream bypass wall 41 and a downstream bypass wall 42.

The upstream bypass wall 41 is shared with the first reactor 10, and the downstream bypass wall 42 is shared with the discharge tank 30.

Hereinafter, the operation of the filter type non-point pollutant treatment apparatus capable of selective treatment of rainfall runoff water and automatic discharge of treated residual water according to the present invention will be described.

When the rainfall runoff flows into the first reactor 10 through the rainfall runoff inflow pipe 11, it is filtered in a downward flow by a downflow filtration means, and the primary treated water is passed through the primary treated water discharge pipe 12. It flows into the lower part of the second reactor 20.

When the downflow filtration process by the downflow filtration means of the first reaction tank 10 is described, the rainfall effluent flowing through the rainfall effluent inflow pipe 11 is filtered while passing through the downflow filtration means from the top to the bottom.

That is, the rainfall runoff flowed into the first reactor 10 is a downflow filter layer 13 having a large particle diameter, a downflow filter layer 14 having a medium particle diameter, and a downflow type having a small particle diameter. It filters while passing through the space | gap between the granular media materials 13a, 14a, 15a which comprise the media layer 15.

Rainfall runoff that passes through the downflow media layers 13, 14, 15 is perforated in the circumferential walls of the vertical vertical hole pipe 16a, the horizontal hole pipe 16b, and the vertical hole pipe 16c constituting the oil hole pipe 16. The through-holes are introduced into the perforated pipes 16a, 16b, and 16c, and are introduced into the lower portion of the second reactor 20 through the first treated water discharge pipe 12 connected to the middle portion of the vertically spaced pipe 16c.

Here, the downflow filter layers (13, 14, 15) constituting the downflow filtering means are cartridges containing granular media (13a) (14a) (15a) in porous containers (13b) (14b) (15b). Since it is comprised by the type | mold, management of installation, the media replacement, etc. with respect to the 1st reaction tank 10 of the downflow media layer 13, 14, 15 is simplified. In addition, since the upflow media layer 22 is configured in the form of a cartridge containing the particulate media 22a in the porous container 22b, installation of the upflow media layer 22 for the second reactor 20 of the upflow media layer 22 and Management of replacement of media is easy.

In addition, the vertical hole (16c) constituting the downward flow filtering means is provided with a connecting portion 17, the primary treatment water discharge pipe 12 and the connecting portion 17 is a female screw portion (12a) and a male screw portion (17a) Since the screw is coupled by the installation and removal of the downflow filter means and the primary treatment water discharge pipe 12 is made easily.

As shown in FIG. 7, when the level of the primary treated water in the second reactor 20 is lower than the bottom height of the bottom-up filtration means, a part of the primary treated water may be secondary treatment of the second reactor 20. After being filtered while passing through the filtration discharge pipe 28 provided at the lower end of the water wall 21, it is discharged to the discharge tank 30 and discharged from the discharge tank 30 through the discharge pipe 31.

At this time, since the filter medium 28b is filled in the filtration discharge pipe 28, the non-point pollutant remaining in the primary treated water is filtered and then discharged into the discharge tank 30.

In addition, when the inflow rate of the primary treatment water flowing into the second reaction tank 20 increases, the primary treatment water that is not filtered and discharged through the filtration discharge pipe 28 among the primary treatment water introduced is the second reaction tank ( It is filtered by the upflow filtration means as it rises from the bottom of 20).

As shown in FIG. 8, when the level of the secondary treated water in the second reactor 20 continues to rise to reach the top height of the vertical oil pipe 23, that is, the height of the secondary treated water overflow wall 21. The secondary treated water filtered by the upflow filtration layer 22 and the vertical perforated pipe 23 is equal to the upper end of the vertical perforated pipe 23 to have the same height as the top of the vertical perforated pipe 23. The flow-flow wall 21 is overflowed and discharged to the discharge tank 30, and discharged from the discharge tank 30 through the discharge pipe 31.

On the other hand, after the inflow and processing of the initial rainwater containing a large amount of non-point pollutants proceeds, the rainfall outflow water containing a small amount of non-point pollutants after the initial flow is continuously introduced into the first reactor (10) as shown in FIG. When the water level of the rainfall runoff in the first reactor 10 becomes higher than the upper end of the upstream vertical oil pipe 16a constituting the downflow filtration means, the rainfall runoff flowing into the first reactor 10 is the downflow filter layer. (13) (14) (15) through the upper end of the vertical vertical hollow pipe (16a) for the current flow into the vertical vertical hollow pipe (16a), horizontal hollow pipe (16b) and vertical hollow pipe (16c) immediately through It is introduced into the second reactor 20 through the primary treated water discharge pipe 12 connected to the vertical oil pipe 16c.

Rainfall runoff after the initial inflow into the second reactor 20 is filtered through the upflow filter layer 22 of the second reactor 20 and then discharged to the discharge tank 30, discharged from the discharge tank 30 It is discharged through the pipe 31.

At this time, since the rain runoff water after the initial stage contains relatively few non-point pollutants, the upflow filtration layer 22 is not overloaded even though the non-point pollutant is introduced into the second reaction tank 20 without being filtered by the downflow filtration means.

In this process, the rainfall runoff in the upper or lower position of the upstream vertical oil pipe 16a among the rainfall runoff flowed into the first reactor 10 is first filtered through the downflow filtration means as described above. It is discharged to the second reactor 20 through the treated water discharge pipe (12).

When the water level of the rainfall outflow water in the first reactor 10 continues to rise and the water level becomes higher than the upstream bypass wall 41 as shown in FIG. 10, the first reactor 10 flows into the first reactor 10. Rainfall effluent does not flow into the second reactor 20 through the downflow filtration means, but flows upstream of the bypass wall 41 and flows into the bypass tank 40 and the rainfall in the bypass tank 40. When the water level of the effluent rises and reaches the height of the downstream bypass wall 41, the rainfall runoff flowing into the bypass tank 40 flows over the downstream bypass wall 41 and flows straight into the discharge tank 30. Bypassed.

Even in such a bypass process, the rainfall runoff water located at a lower position than the bypass overflow wall 41 among the rainfall runoff water in the first reaction tank 10 is discharged to the second reaction tank 20 through the filtration process by the downflow filtration means described above. do.

Therefore, the initial rainfall effluent containing a large amount of non-point pollutants is discharged after treating the non-point pollutants through the downflow filtration means of the first reaction tank 10 and the upflow filtration means of the second reaction tank 20. Rainfall effluent containing little non-point pollutants is discharged through the bypass tank 40 without passing through the downflow filtration means of the first reaction tank 10 and the upflow filtration means of the second reaction tank 20. By bypassing the discharge, it is possible to reduce the size of the non-point pollutant treatment device while effectively treating the non-point pollutant in the initial rainfall effluent.

When the rainfall stops, the water level in the first reactor 10 and the second reactor 20 is lowered. The circle of the filtration discharge pipe 28 installed at the lower end of the secondary treated water overflow wall 21 of the second reactor 20 is lowered. Since the bottom end of the inner wall surface of the clearance 28a is installed higher than the bottom surface of the second reactor 20, contaminants and rainfall runoff remain at the bottom of the second reactor 20.

In addition, when the rainfall stops, contaminated water remains in the first reaction vessel 10 and the second reaction vessel 20, which is the filtration discharge pipe 28 installed at the lower end of the secondary treated water suspension wall 21 of the second reaction vessel 20. It is gradually discharged by moving to the discharge tank 30 through. As the discharge proceeds, the water level of the second reactor 20 is lowered, and the treated water accumulated in the upstream filter 22 is automatically backwashed with the filter medium.

At this time, the upflow filtration means in the second reaction tank 20 is exposed to air and dried without being immersed in rainfall runoff or treated water, and thus the performance of the upflow filtration means is continuously maintained and its service life is extended.

Second Embodiment

11 to 15 show a second embodiment of a filter type non-point pollutant treatment apparatus capable of selective treatment of rainfall effluent water and automatic discharge of treated residual water according to the present invention.

In the present embodiment, the height of the secondary treated water overflow wall 21 of the second reactor 20 is formed higher than the top height of the upflow filter means and lower than the height of the bypass overflow wall 42 so that the upflow filter means The residual layer of the secondary treated water is formed in the upper layer so that the upstream filtration means can be backwashed by the rainfall effluent and / or the secondary treated water remaining in the second reactor 20 after the rainfall stops. .

That is, as shown in Figs. 12 and 13, the upper height of the secondary treated water overflow wall 21 is formed by h1 higher than the upper end of the upflow filter means, that is, the upper surface of the partition plate 24. It is preferable to set the h1 to about 10 mm, but it is sufficient to set it lower than the top height of the upflow filter means and lower than the height of the bypass overflow wall 42.

The primary treatment process and the upflow filtration means for the initial rainfall effluent by the filter type nonpoint pollutant treatment device capable of the selective treatment of the rainfall effluent and the automatic discharge of the treated residual water according to the present embodiment. Secondary processing, and processing through the upstream vertical hollow pipe 16a, filtration by the filtration discharge pipe 28 and the bypass by the bypass tank 40 are the same as in the first embodiment described above, the same The same reference numerals are used for parts, and detailed description thereof is omitted.

Hereinafter, a backwashing process by the filter type non-point pollutant treatment apparatus capable of selective treatment of rainfall runoff and automatic discharge of treated residual water will be described.

If the rainfall stops, the water level in the first reactor 10 and the second reactor 20 is lowered. In this process, the height of the secondary treated water overflow wall 21 of the second reactor 20 is increased by the upflow filtration means. Since the water level in the second reactor 20 reaches the height of the secondary treated water overflow wall 21, the overflow of the secondary treated water overflow wall 21 is no longer performed. Water upstream of the upper surface of the flow filtering means and rainfall runoff water in the portion where the upflow filtering means are locked are flowed down the upflow filtering means while forming the upflow filter layer 22 and the vertical oil pipe 23 forming the upflow filtering means. The contaminants in the filtration holes of the backwash, and the falling rainfall runoff is filtered through the filtration discharge pipe 28 installed at the lower end of the secondary treated water overflow wall 21 is discharged to the discharge tank (30).

Hereinafter, although not shown in the drawings will be described another embodiment that can be implemented by the present invention.

Other Example 1

The present embodiment is based on the combination of the first reactor 10, the second reactor 20 and the discharge tank 30, and includes a filtration discharge pipe (28).

In this embodiment, after rain or rain stops, rainfall runoff or treated water in the second reaction tank 20 is gradually discharged to the discharge tank 30 through the filter discharge pipe 28 so that the upflow filtration means is not submerged in the contaminated water. It is maintained in the exposed state and dried in order to maintain the performance of the upflow filter means and to extend the service life.

Other Example 2

The present embodiment is based on the combination of the first reactor 10, the second reactor 20 and the discharge tank 30, and includes a vertical oil pipe (16a) for the overflow.

In the present embodiment, when the water level of the rainfall runoff flowing into the first reaction tank 10 becomes higher than the upper end of the vertical vertical hole tube 16, the monthly vertical hole tube 16a through the upper end of the vertical hole tube 16a After the direct flow into the second treatment tank 20 through the first treated water discharge pipe 12 and the first treated water introduced into the second reaction tank 20 is subjected to secondary filtration by the upflow filter means The second treated water overflow wall 21 is overflowed and discharged to the discharge tank 30.

Other Example 3

The present embodiment is based on the combination of the first reactor 10, the second reactor 20 and the discharge tank 30, and includes a bypass tank 40.

In the present embodiment, when the water level of the rainfall runoff flowing into the first reactor 10 is higher than the upper height of the bypass overflow wall (in the example including the upstream vertical pipe, the upper height of the upstream vertical pipe) Rainwater runoff flows through the bypass wall 41 and flows into the discharge tank 30 through the bypass tank 40 without being filtered by the downflow filtering means and the upflow filtering means. .

As described above in detail by taking a preferred example of the present invention, it will be apparent to those skilled in the art that various modifications and variations are possible within the scope of the technical idea of the present invention, these modifications and modifications are attached to the appended claims It is natural to be in range.

10: first reactor 11: rainfall runoff inflow pipe
12: Primary treatment water discharge pipe 13,14,15: Downflow media layer
16: merit pipe
20: second reactor 21: secondary treated water overflow wall
22: Upflow filter media 23: Merit pipe
28: filtration discharge pipe
30: discharge tank 31: discharge pipe
40: bypass tank 41: upstream bypass wall
42: downstream bypass wall

Claims (11)

A first reaction tank 10 having a rainfall runoff inflow pipe 11 at an upper end of the upstream side, a first treatment water discharge pipe 12 at a lower end of the downstream side, and a built-in downflow filtration means;
A second reaction tank 20 having an upstream lower end connected to the first treated water discharge pipe 12, a second treated water overflow wall 21 disposed downstream, and a built-in upflow filtering means;
A discharge tank 30 disposed at a downstream side of the second reactor 20 and having a discharge pipe 31 at a lower end of the downstream side; And
Rainfall effluent water, which is provided at the lower end of the secondary treated water overflow wall 21 of the second reaction tank 20 and comprises a filtration discharge pipe 28 connecting the second reaction tank 20 and the discharge tank 30. Filter type non-point pollutant treatment device capable of selective treatment and automatic discharge of residual water. The method of claim 1, wherein the downflow filtering means,
Downstream filter media layers (13, 14, 15) of the upper, middle, and lower layers stacked in the first reactor (10),
It is embedded in the downflow media layer (13) (14) (15) and the lower end is connected to the primary treated water discharge pipe 12, the upper height is the upper height of the downflow filter means and the secondary treated water Filter type non-point pollutant treatment device capable of the selective treatment of rainfall outflow water and the automatic discharge of the treated residual water, characterized in that it further comprises a vertical oil pipe (16a) for higher than the top height of the overflow wall (21). The method of claim 2, wherein the downflow filtering means
It is disposed in the up and downstream direction at the bottom side of the first reactor 10 and is embedded in the downflow filter layer (13) (14) (15) is connected to the lower end of the vertical hole (16a) in the middle portion Cross pipes (16b),
It is disposed in the left and right directions on the bottom side of the first reactor 10 and is embedded in the downflow filter layer (13) (14) (15) and the left and right ends thereof are connected to the downstream end of the cross-hole pipe (16b) Filtration type non-point pollutant treatment device capable of the selective treatment of rainfall runoff and the automatic discharge of treated residual water, characterized in that the middle portion further comprises a vertical oil pipe (16c) connected to the primary treated water discharge pipe (12) . The method of claim 1, wherein the upward flow filtering means
The upstream filter layer 22 which is located at a height spaced apart from the bottom surface of the second reactor 20 and whose top is located at a lower level than the secondary treated water overflow wall 21 and becomes a particulate filter 22a is formed. Filter type non-point pollutant treatment device capable of selective treatment of rainfall runoff and automatic discharge of treated residual water, characterized in that it comprises a. The method of claim 4, wherein the upward flow filtering means
Selective treatment and treatment residues of rainfall effluent, each of which is buried in each of the upflow media layers 22 and further comprises a vertical perforated pipe 23 corresponding to the upper and lower ends of the upflow media layer. Filter type non-point pollutant treatment device capable of automatic discharge of water. The method of claim 4 or 5, wherein the upflow media layer 22
Through the second reactor 20 and the passage hole 24a corresponding to the diameter of the vertical hole tube 23 is mounted to the second reactor 20 as a unit fixed to the perforated partition plate 24 Filter type non-point pollutant treatment device capable of selective treatment of rainfall effluent and automatic discharge of treated residual water. The method of claim 4 or 5, wherein the upflow media layer 22
Selective treatment and treatment of rainfall effluent water, characterized in that the water supply hole (24a) corresponding to the diameter of the vertical perforated pipe (23) is mounted to the second reactor 20 as one unit fixed to the perforated partition plate (24). Filtration type non-point pollutant treatment device capable of automatic discharge of residual water. The method of claim 1, wherein the filtration discharge pipe 28 is
Filtration type non-point pollutant treatment apparatus capable of selective treatment of rainfall outflow water and automatic discharge of treated residual water, characterized in that the lowest end of the inner wall surface is installed higher than the bottom surface of the second reaction tank (20). The method of claim 8, wherein the filtration discharge pipe 28
Removably fitted in the installation hole (21a) that is drilled in the lower end of the secondary treated water overflow wall 21, both ends of the cylindrical tube (28a) and the filter medium filled in the interior of the cylindrical tube (28a) 28b) and a filter type coupled to the open end of the discharge tank 30 and including a stopper 28c having a plurality of through holes, so as to selectively treat the rainfall effluent and to automatically discharge the treated residual water. Non-point pollutant treatment device. 10. The method of claim 9, wherein the media (28b) is
Filter type non-point pollutant treatment device capable of selective treatment of rainfall effluent and automatic discharge of treated residue The method of claim 9, wherein the filtration discharge pipe 28 is
Filtration type non-point pollution capable of selective treatment of rainfall effluent and automatic discharge of treated residual water, characterized in that it further comprises a filter net (28d) installed in the open end of the second reaction tank 20 side of the cylindrical tube (28a) Material handling device.

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