KR20090047857A - A apparatus for non-point source purification and a methode thereof - Google Patents

Abstract

The present invention improves the particle separation efficiency of non-point contaminants, and cleans the filter member inside the swirl flow chamber by using aberration that sharply lowers the internal level of the swirl flow chamber by using aberration. It relates to a non-filtration apparatus and method for extending the life of the.

Backwashing, Washing, Filters, Non-Pollution, Filtration

Description

Non-point source apparatus and method {a apparatus for non-point source purification and a methode}

The present invention relates to a non-point filtration apparatus and method, and more particularly, to improve the particle separation efficiency of non-point contaminants, and to use aberrations to sharply lower the internal water level of the swirl flow chamber using aberrations. The present invention relates to a non-point filtration apparatus and a method for extending the life of a filter member by cleaning the filter member inside the swirl flow chamber.

The present invention relates to a non-point filtration apparatus and method, and more particularly, to improve the particle separation efficiency of non-point contaminants, and to use aberrations to sharply lower the internal water level of the swirl flow chamber using aberrations. The present invention relates to a non-point filtration apparatus and a method for extending the life of a filter member by cleaning the filter member inside the swirl flow chamber.

Pollutants generated in urban areas can be divided into point sources and nonpoint sources.

Non-point source is a source of pollutants washed out by rainwater during rainfall and is very difficult to treat because of the concentration of runoff during rainfall.

Non-point sources have not been recognized for their importance as pollutants because the outflow of pollutants is concentrated only during rainfall and the sources are dispersed in large areas.

However, the first runoff (first-flush), which causes surface pollutants to flow out at the early stage of rainfall, has a high concentration of pollutants, especially in urban areas, and is likely to contain toxic substances such as heavy metals. This is required.

The facilities that are applied as non-point source treatment facilities include various types of treatment facilities, such as reservoir type such as artificial wetland, device type such as swirl treatment device, and filtration type such as filtration tank, and these facilities have advantages and disadvantages. The application method should be different.

However, in Korea, most of the facilities that are applied as non-point source treatment facilities have a large storage area and have a problem in that they are applied to urban areas.

Therefore, most of the non-point source reduction facilities applied to urban areas are mostly centrifugal and filtration.

Looking at the treatment efficiency of the narae treatment facilities of the above configuration, each treatment facility has a certain treatment efficiency, but there was a problem that it is difficult to expect a flexible treatment efficiency for the non-point source having a large change in flow rate and concentration.

In addition, the conventional treatment facilities using the filter medium in the conventional technology is capable of a high treatment efficiency of more than 90% when the inflow flow is small, but because the surface area load rate is small, only a high portion of rainfall runoff is applied to the treatment efficiency, Most rainfall runoff has a problem that no treatment is made.

In addition, a conventional treatment facility using a filter medium in the prior art has a problem that the maintenance cost is high because the filter medium must be frequently washed or replaced.

Therefore, the present invention has been proposed to solve the above problems of the prior art, the waste water to maintain the water level higher than the installation position of the filter member in the inside of the swirl flow chamber by using aberrations from the outside rapidly It is an object of the present invention to provide a non-point filtration apparatus and method for extending the replacement period of a filter member as the filter member can be cleaned by lowering the filter member.

The present invention for achieving the above object is to form an inlet on the bottom peripheral surface and having a discharge port on the upper peripheral surface and the circulating flow chamber for introducing and discharging waste water, and partitions the inside of the swirling flow chamber to the upper and lower A filter member for filtering a relatively small foreign matter contained in the wastewater flowing into the inlet and rising, and an overflow tank open to the upper part while temporarily storing the wastewater overflowed by being connected to the outlet of the swirl flow chamber. And, formed on the circumferential surface of the overflow tank corresponding to a position lower than the lower height of the discharge port is formed so that the end portion is positioned at a position higher than the lower height of the discharge port to drain residual wastewater when the inflow of the waste water more than the set amount A water treatment drainage port formed so as to be disposed between the inlet port and the outlet port; A channel having an opening and closing door extending on the circumferential surface of the burr and intermittently controlling the flow of the wastewater by the hydraulic pressure inside the swirling flow chamber, and connected to the end of the channel to store the wastewater when the opening and closing door is opened and being higher than the channel. A double pipe member forming an opening opening communicating with the upper direction from the inside corresponding to the position, and the end is bent upward in the interior of the double pipe member adjacent to the lower end of the opening to discharge the waste water of the water level higher than the end to the outside A backwash water outlet, an oil chamber formed on the circumferential surface of the swirl flow chamber corresponding to a height similar to the outlet, for separating and storing oil from the wastewater before being discharged to the outlet, and provided inside the swirl flow chamber; After separating the relatively heavy contaminants contained in the wastewater flowing in more than a set amount, the wastewater overflows to the overflow tank It is characterized in that it comprises a separating portion, and the opening and closing portion to move up and down inside the opening in accordance with the aberration of the overflow tank to open and close the backwash water outlet.

In addition, the present invention is to filter the wastewater that has dropped the contaminants in the centrifugal separation chamber with the filter member and the perforated plate during the inflow of wastewater exceeding the unit flow amount of the treatment drainage into the swirl flow chamber and overflowed to the overflow tank through the overflowware In addition, the wastewater inside the swirling flow chamber is drained through the channel which drains to the treated drainage port and prevents the backwash water outlet of the double pipe member as a plug member falling due to the rise of the level of the overflow tank, and opens and closes the door by water pressure. The stopper member rises due to the drainage step of the filtered wastewater flowing into the double pipe member and the lowering level of the overflow tank as it is not drained to the wastewater drain when the wastewater inflow is less than the unit flow amount of the wastewater drain. As the backwash water outlet opens, the wastewater introduced through the channel is reversed. Residual wastewater discharged to the waste water outlet, and when the level of the overflow tank is below the set level of the overflow tank by the check valve is opened by the rise of the stopper member, the level of the overflow tank is drastically lowered and the residual wastewater in the swirl flow chamber And a backwashing step of cleaning the filter member by lowering the water level inside the swirling flow chamber below the filter member in a short time by flowing into the channel.

As described above, according to the non-point filtration apparatus and method according to the present invention, when the water level inside the swirl flow chamber is below a certain level, the life of the filter member can be extended by rapidly lowering the water level below the filter member. It works.

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

1 is a longitudinal cross-sectional view of a non-point filtration device according to the present invention, Figure 2 is a plan view of the non-point filtration device according to the present invention, Figure 3 is a perspective view of the main part showing the centrifugal chamber of the non-point filtration device according to the present invention.

4 to 7 are operational state diagrams of the non-point filtration apparatus according to the present invention, Figure 8 is a flow chart showing a non-point filtration method according to the present invention.

As shown in Figures 1 to 3, the non-point filtration apparatus according to the present invention is a swirl flow chamber 100, the filter member 110, the overflow tank 120, the water drainage port 130, the channel 140 , The double pipe member 150, the backwash water outlet 160, the oil chamber 170, the separating part 200, and the opening and closing part 300.

The swirl flow chamber 100 is installed in a river or the like and has an inlet 102 on the lower circumferential surface for introducing wastewater such as rainwater, and forms an outlet 104 on the upper circumferential surface for discharging the filtered wastewater. .

At this time, the swirl flow chamber 100 is preferably formed to open and close the upper surface.

Here, the swirl flow chamber 100 is filtered by dropping the first relatively large gravity of the contaminants from the wastewater introduced by centrifugal separation, and secondly to filter the floating foreign matter with a relatively small specific gravity.

At this time, the swirl flow chamber 100 is provided with a filter member 110 therein to filter foreign matter suspended in the waste water.

In particular, the filter member 110 partitions the inside of the swirl flow chamber 100 up and down.

That is, the wastewater introduced into the inlet 102 flows through the filter member 110 only to the outlet 104.

At this time, the swirl flow chamber 100 has an installation bracket 106 formed at an oblique end on the inner side, and the filter member 110 is mounted on the outer side symmetrically with the inclination of the installation bracket 106. The bracket 112 is provided.

Thus, the mounting bracket 112 is supported so as to be interviewed by the installation bracket 106, so that the filter member 110 is mounted inside the swirl flow chamber 100.

In addition, since the mounting bracket 112 is connected to the filter member 110, the filter member 110 can be easily separated from the swirl flow chamber 100.

In addition, the overflow tank 120 is connected to the outlet 104 of the swirl flow chamber 100 to temporarily store the waste water overflowed.

The overflow tank 120 is preferably integrally connected to the circumferential surface of the swirl flow chamber 100, and forms a bottom at a lower position than the lower side of the outlet 104.

In addition, the overflow tank 120 is open at the top.

On the other hand, the treatment water drain 130 is formed extending from the overflow tank 120 serves to discharge the waste water of a predetermined level or more of the overflow tank 120 to the outside.

At this time, the treatment drain 130 is formed extending from the circumferential surface of the overflow tank 120 corresponding to a position lower than the lower height of the outlet 104, the end portion at a position higher than the lower height of the outlet 104 Bend to position.

Thus, the treatment water drain 130 is formed to drain the internal residual wastewater when the wastewater inflow over a set amount through the inlet (102).

In addition, the channel 140 is formed at a circumferential surface corresponding between the inlet 102 and the outlet 104 of the swirl flow chamber 100.

In addition, the channel 140 has an opening and closing door 142 that is automatically opened and closed by the hydraulic pressure of the waste water stored in the swirl flow chamber 100.

The double pipe member 150 is connected to the end of the channel 140.

At this time, the opening and closing door 142 of the channel 140 is formed inside the double pipe member 150.

Thus, the double pipe member 150 temporarily stores wastewater introduced from the swirl flow chamber 100 when the opening / closing door 142 is opened.

In addition, the double pipe member 150 forms an opening 152 which communicates with and opens from the inside to the upper portion corresponding to a position higher than the height of the channel 140.

Therefore, the double pipe member 150 forms a double pipe shape by the opening 152.

In addition, the backwash water outlet 160 is inserted into the peripheral surface of the lower end of the double pipe member 150.

In addition, the backwash outlet 160 is bent upward from the inside of the double pipe member 150 and extends to the bottom of the opening 152.

Thus, waste water stored in the double pipe member 150 is discharged to the outside through the backwash water outlet 160 when the water level is higher than the height of the backwash water outlet 160.

On the other hand, the oil chamber 170 is formed on the circumferential surface of the swirl flow chamber 100 corresponding to the height similar to the discharge port 104 serves to separate and store the oil in the waste water before discharged to the discharge port 104 do.

In addition, the separating unit 200 is provided inside the swirl flow chamber 100 to separate the relatively large specific contaminants contained in the wastewater when the wastewater flows over a predetermined amount, and then drains the wastewater to the overflow tank 120. It plays a role.

Here, the separation unit 200 is composed of a centrifuge chamber 210, the support 230, the perforated plate 240, the overflow wear 250 and the overflow trap 260.

The centrifugal chamber 210 is connected to the end of the inlet 102, and serves to drop the relatively large contaminants.

That is, as shown in Figure 3, the centrifugal separation chamber 210 is formed in the upper and lower openings of the upper and lower openings to be centrifugally rotated along the inner surface by the partial output flow of the waste water.

In particular, the centrifugal separation chamber 210 is connected along the inner side of the swirl flow chamber 100 whose upper edge is higher than the position of the channel 140.

At this time, in the centrifuge chamber 210, the contaminants fall, the waste water is rotated and the water level is increased.

In particular, the inlet 102 is formed in parallel with the tangential direction at the same time toward the inner surface of the centrifuge chamber 210 to maximize the centrifugal rotational force of the waste water.

Thus, the wastewater inside the lower portion of the swirl flow chamber 100 is allowed to flow such as wastewater only through the centrifugation chamber 210.

Here, the channel 140 is formed in the lower portion of the upper edge of the centrifugation chamber 210 connected to the inner surface of the swirl flow chamber 100 and flows downward through the centrifugation chamber 210 to the double pipe member 150. Guide).

And, the support 230 is formed to extend from the upper center of the lower side of the swirl flow chamber 100 to support the filter member 110 and the like.

At this time, the support 230 forms a baffle 232 having a hat shape along the lower circumferential surface to prevent resuspension of the contaminants dropped to the bottom of the swirl flow chamber 100, and is formed in a hollow and the upper circumferential surface A communication hole 234 is formed in the upper portion to guide the upward flow and bubbles of the wastewater generated from the outside of the lower end by the centrifugal chamber 210.

In addition, the perforated plate 240 is formed over the entire upper surface of the filter member 110, forms a plurality of pores to guide the filtered wastewater to the top.

In particular, the perforated plate 240 is formed in the outer circumferential surface of the back washing hole 242 recessed in the center direction at the same height as the inlet 102 to the maximum flow back of the waste water of the overflow tank 120 filter member 110 It helps to clean.

The overflow wear 250 is formed on the perforated plate 240 and has a cylindrical shape connected to the support 230.

Thus, the overflowware 250 serves to overflow the wastewater and the suspended matter to the overflow tank 120 through the discharge port 104 when the wastewater inflow of the set amount or more through the inlet port (102).

At this time, the overflow trap 260 is formed around the overflow wear 250.

The overflow trap 260 is formed to extend upward from the upper edge of the filter member 110 to form a space between the overflow wear 250, through the overflow water discharge hole 262 to match the outlet 104 The overflowed wastewater and floats are guided to the overflow tank 120.

On the other hand, according to the aberration of the overflow tank 120 is raised and lowered in the opening 152, the opening and closing portion (150) in the overflow tank 120 and the double pipe member 150 to open and close the backwash outlet 160 300 is formed to connect.

The opening and closing part 300 is a roll member 310, rope member 320, floating ball 330, stopper member 340, air outlet 350, check valve 360, lever 370 and the operation member ( 380).

The roll member 310 is rotatably formed at least directly above the overflow tank 120 and the opening 152.

At this time, although not shown, the roll member 310 is rotatably installed by being supported by a separate device.

In addition, the roll member 310 is preferably provided with a plurality for the tension control of the conveying rope member 320.

In particular, the rope members 320 are wound on the upper circumferential surface of each of the roll members 310 so that one end thereof extends in the overflow tank 120 and the other end inside the opening 152 of the double pipe member 150. Extends.

At this time, the floating ball 330 is connected to one end of the rope member 320, and floats on the surface of the overflow tank 120.

Therefore, the floating ball 330 is raised and lowered as the surface of the overflow tank 120 rises and falls.

In addition, the closure member 340 is connected to the other end of the rope member (320).

Thus, when the floating ball 330 is raised, the stopper member 340 is pulled down while pulling the rope member 320, and when the floating ball 330 is lowered, the plug member 340 is rope member 320. Is pulled up by).

At this time, the stopper member 340 is raised and lowered in the opposite direction to the floating ball 330 and opens and closes the backwash water outlet 160.

When the plug member 340 blocks the backwash water outlet 160, wastewater introduced through the channel 140 is stored in the double pipe member 150, and the stopper member 340 is backwashed water outlet 160. When opened, the waste water of the double pipe member 150 is discharged through the backwash water outlet 160.

In particular, the closure member 340 is similar to the cross-sectional area of the opening 152 and is formed of a material higher than the specific gravity of the waste water, it is preferable to prevent the waste water flows back through the opening 152.

The air outlet 350 is formed on the upper circumferential surface of the double pipe member 150.

In addition, when the check valve 360 is formed in the air inlet 350 and opened by an external operation (ON), the wastewater inside the swirl flow chamber 100 opens the opening and closing door 142 of the channel 140 by hydraulic pressure. And the double pipe member 150 is to flow while increasing the flow rate in a short time.

Therefore, since the water level inside the swirl flow chamber 100 descends below the filter member 110 in a short time, the wastewater filtered through the filter member 110 may be cleaned to remove foreign substances on the filter member 110. do.

And, the lever 370 is one end is connected to the check valve 360, it is formed to seesaw movement with respect to the center.

In addition, the operation member 380 extends from the floating ball 330 and is connected to the other end of the lever 370 after the winding on the roll member 310 located directly above the overflow tank 120.

Therefore, when the floating ball 330 is lowered while the surface of the overflow tank 120 is lowered, the operation member 380 is pulled, and thus the lever 370 is pulled from the other end to the other end based on the center. Tilted so that it is downward.

At this time, the operation member 380 is wound on the at least one pair of wheel member 382 rotatably installed on any wall in the opposite direction to adjust the tension force.

Accordingly, one end of the lever 370 opens the check valve 360, and thus the double pipe member 150 discharges air through the air outlet 350.

On the contrary, when the surface of the overflow tank 120 rises, the air outlet 350 is closed due to the inclination of the lever 370 in the opposite direction.

On the other hand, the roll member 310 which is located directly above the double pipe member 150 is formed with a winding member 410 is rotated in the opposite direction, the guide roller member 420 on the upper side of the double pipe member 150 It is rotatably formed.

In addition, the winding member 410 and the guide roller member 420 are wound together with the pulling member 430 running in the opposite direction of the rope member 320.

In addition, the lifting member 440 is provided at the end of the pulling member 430 when the floating ball 330 is lowered by the aberration of the overflow tank 120 to be lowered in the opposite direction.

The air vent pipe 450 is extended to the bent portion of the treatment drain 130 to discharge the air remaining inside the corresponding portion when the lifting member 440 rises to the outside.

This is to prevent the interference of the flow of the waste water by forcibly discharging it as the treated water drain 130 is bent to form the air remaining in the bent portion.

In the drawings, the roll member 310, the lever 370, the wheel member 382, the winding member 410, and the guide roller member 420 are schematically illustrated, and the installation structure is general.

In addition, the swirl flow chamber 100 and the double pipe member 150 are preferably formed to be opened and closed to clean the inside thereof.

In particular, it is obvious that the opening and closing part 300 can be sufficiently opened and closed in another manner besides the configuration shown.

On the other hand, as shown in Figures 4 to 8, the non-point filtration method according to the present invention is characterized in that to perform the step (S10), residual wastewater drainage step (S20) and backwashing step (S30) of the filtered wastewater in order. It is done.

At this time, the state of FIG. 4 is made into an initial state.

That is, since the wastewater does not flow into the swirl flow chamber 100 from the outside, residual waste water is stored up to the lower portion of the channel 140, and the discharge port 104 of the swirl flow chamber 100 is stored in the overflow tank 120. The residual wastewater corresponding to the level of the curved portion of the treated drainage port 130 and below is stored.

At this time, since the floating ball 330 is lowered to the lowest point position, the stopper member 340 is raised so that the backwash water outlet 160 is open (ON), and the lever 370 is tilted upward to check valve ( 360 is open (ON), the elevating member 440 is raised to the air vent pipe 450 is opened (ON).

And, Figure 5 shows the operating state of the drainage step (S10) of the filtered wastewater.

More specifically, the amount of wastewater larger than the set amount of the water drainage port 130, that is, the unit passage amount, is continuously introduced into the swirl flow chamber 100 through the inlet port 102 and vortexed through the centrifugation chamber 210. To form, thereby dropping a relatively large specific gravity.

The wastewater dropping the contaminants is vortexed in a state containing a relatively small foreign matter to increase the water level to pass through the filter member (110).

The wastewater passing through the filter member 110 is discharged to the outlet 104 through the overflowware 250 and the overflow trap 260 after passing through the perforated plate 240.

At this time, the overflow trap 260 to filter out the foreign matter so as to sink the foreign matter of the filtered wastewater.

The wastewater discharged to the outlet 104 is discharged through the treatment drain 130 while gradually increasing the level of the overflow tank 120 as it flows into the overflow tank 120.

Here, the floating ball 330 floating on the water surface of the overflow tank 120 is raised and plug member 340 through the rope member 320 connected to the floating ball 330 and supported by the roll member 310 ) Closes the backwash water outlet 160 (OFF).

At this time, the opening and closing door 142 of the channel 140 is open (ON) due to the rising water level of the swirl flow chamber 100, the waste water of the lower portion of the swirl flow chamber 100 through the channel 140 is a double pipe member 150 flows into the interior.

Thus, the water level inside the double pipe member 150 is increased.

In particular, as the floating ball 330 rises, the check valve 360 is closed while the operation member 380 connected to the floating ball 330 and wound around the wheel member 382 does not pull the lever 370. (OFF) is maintained.

In addition, the pulling member 430 formed on the roll member 310 positioned directly above the double pipe member 150 and wound together on the winding member 410 and the guide roller member rotated in the opposite direction to the roll member 310. ) Is lowered due to the rise of the floating ball 330, the elevating member 440 maintains the lowest position and closes the air vent pipe 450 (OFF).

On the other hand, Figure 6 shows the operating state of the residual wastewater drainage step (S20).

In more detail, the wastewater does not flow into the swirl flow chamber 100 through the inlet 102, but flows into the double pipe member 150 through the channel 140 that opens and closes the door 142. As the discharge tank 104 is discharged to the overflow tank 120, the level inside the swirl flow chamber 100 is gradually lowered.

Then, the level of the overflow tank 120 is also lowered so that the floating ball 330 is gradually lowered.

Subsequently, by pulling the rope member 320 and the stopper member 340 supported by the roll member 310, the backwash water outlet 160 is opened (ON).

Thereafter, the wastewater inside the double pipe member 150 is discharged through the open backwash outlet 160.

At this time, since the rope member 320 and the pulling member 430 were loose when the floating ball 330 was raised, the check valve 360 and the air vent pipe 450 even when the floating ball 330 was lowered. Remains closed (OFF).

Unexplained reference numerals are replaced with those described above.

In addition, Figure 7 shows the operating state of the backwashing step (S30).

In more detail, the floating ball 330 is the operating member 380 and the lever 370 at the time when the water level of the overflow tank 120 is continuously lowered to the lower side of the outlet 104 of the swirl flow chamber 100. By pulling on, the check valve 360 is opened (ON).

At the same time, as the air inside the double pipe member 150 is discharged to the outside, the residual wastewater of the swirl flow chamber 100 rapidly flows into the double pipe member 150 through the channel 140 opened by hydraulic pressure (ON). do.

Therefore, the water level inside the swirl flow chamber 100 rapidly lowers to the lower portion of the filter member 110.

At this time, the wastewater of the overflow tank 120 is flowed back to the filter member 110 as much as possible through the backwashing hole 242 of the perforated plate 240.

In addition, as the elevating member 440 is raised, the air vent pipe 450 is opened (ON).

The opening / closing door 142 of the channel 140 is opened (ON) due to the water pressure weakening due to the water level decrease of the swirl flow chamber 100.

Unexplained reference numerals are replaced with those described above.

1 is a longitudinal sectional view of a non-point filtration apparatus according to the present invention;

2 is a plan view of a non-point filtration apparatus according to the present invention.

Figure 3 is a perspective view of the main part showing the centrifugal chamber of the non-point filtration apparatus according to the present invention.

4 to 7 is an operational state diagram of the non-point filtration apparatus according to the present invention.

8 is a flow chart showing a non-point filtration method according to the present invention.

Explanation of symbols on main parts of drawing

100: swirl flow chamber 110: filter member

120: overflow tank 130: treatment drain

140: channel 150: double pipe member

160: backwash water outlet 170: oil chamber

200: separator 210: centrifuge chamber

240: punched plate 300: opening and closing part

410: winding member

Claims (7)

A swirl flow chamber forming an inlet on the lower periphery and having an outlet on the upper periphery to guide the inflow and discharge of waste water; A filter member provided to divide the inside of the swirl flow chamber into upper and lower parts, and filter foreign substances having a relatively low specific gravity contained in the wastewater flowing into the inlet and rising; An overflow tank connected to an outlet of the swirl flow chamber to temporarily store the wastewater overflowed and open at an upper portion thereof; It is formed on the circumferential surface of the overflow tank corresponding to a position lower than the lower height of the outlet, and is bent so as to be positioned at a position higher than the lower height of the outlet so as to drain residual wastewater when the inflow of waste water over a set amount A formed water drainage hole; A channel extending on a circumferential surface of the swirl flow chamber corresponding to the inflow port and the discharge port and having an opening and closing door to control the flow of waste water by the hydraulic pressure inside the swirl flow chamber; A double pipe member connected to an end of the channel to store the wastewater when the opening / closing door is opened, and having an opening that communicates upward in an interior corresponding to a position higher than the channel; A backwash water outlet configured to bend an end upwardly into the inside of the double pipe member adjacent to a lower end of the opening to discharge wastewater having a water level higher than the end to the outside; An oil chamber formed on a circumferential surface of the swirl flow chamber corresponding to a height similar to the outlet to separate and store oil in the wastewater before being discharged to the outlet; A separating part provided inside the swirling flow chamber to separate the relatively large contaminants contained in the wastewater flowing in a predetermined amount and flowing the wastewater into the overflow tank; A non-point filtering device, characterized in that it comprises an opening and closing portion for opening and closing the backwash water outlet in accordance with the aberration of the overflow tank. The method of claim 1, The separation part is formed at the end of the inlet, the upper edge is connected to the inner side of the swirl flow chamber higher than the height of the channel, and the upper and lower portions are formed in the upper and lower openings are formed by the upper light lower narrow side to the inner surface by the inlet power output A centrifugal chamber which is centrifugally rotated to drop the relatively large contaminants; A support extending from the upper center to the lower portion of the swirl flow chamber to support the filter member; A perforated plate which is formed over the entire upper surface of the filter member and is connected to the support, and through the pores communicating upward and downward to guide the wastewater which filtered the foreign matter upwards; Overflow wear is formed on the perforated plate, and connected to the support for overflowing the wastewater and floats into the overflow tank when the wastewater of a predetermined amount or more is introduced; The trap is formed extending from the upper edge of the filter member to the upper portion to form a space between the overflow wear, and through the overflow water discharge hole to guide the overflowed wastewater and floats to the overflow tank in accordance with the outlet Non-point filtration device, characterized in that consisting of. The method of claim 2, The support forms a baffle along a lower circumferential surface to prevent resuspension of the contaminants dropped to the bottom of the swirl flow chamber; The non-point filtration device, characterized in that formed in the hollow and at the same time forming a communication hole in the peripheral surface of the upper end to guide the upward flow and bubbles generated from the outside of the upper end. The method of claim 2, The perforated plate is a non-filtration unit, characterized in that to form a backwashing recess recessed in the center direction from the outer peripheral surface at a height similar to the inlet to clean the filter member by flowing the wastewater of the overflow tank to the maximum. The method of claim 1, The opening and closing portion is a roll member rotatably formed at least directly above the overflow tank and the opening; A rope member supported on a circumferential surface of the roll member, the one end extending in the overflow tank direction and the other end extending into the opening; A floating ball formed at one end of the rope member to move up and down according to a change in the level of the overflow tank; A stopper member made of a material higher than the specific gravity of the waste water stored in the double pipe member and formed at the other end of the rope member to open and close the backwash water outlet according to the aberration of the overflow tank; An air outlet port formed on an upper circumferential surface of the double pipe member; The wastewater of the swirling flow chamber is introduced into the double pipe member in a short time through the channel when connected to the air outlet and opened by an external operation, thereby rapidly lowering the water level inside the swirling flow chamber to the bottom of the filter member. A check valve for cleaning the filter member; A lever connected to one end of the check valve and performing a seesaw movement based on a center; Is supported by the roll member which extends from the floating ball directly above the overflow tank, and is connected to the other end of the lever to open and close the check valve through the lever to raise and lower the floating ball, at least one pair Non-point filtration device, characterized in that consisting of the operation member is wound in the opposite direction to the wheel member is adjusted in tension. The method of claim 5, The roll member located directly above the double pipe member is formed with a winding member which rotates in the opposite direction; A guide roller member is rotatably formed on an upper side of the double pipe member; The winding member and the guide roller member are wound together with a pulling member running in the opposite direction of the rope member; At the end of the pulling member is provided with a lifting member which is lowered in the opposite direction when the floating ball is lowered by the aberration of the overflow tank, An air vent pipe is extended to the bent portion of the water treatment drainage, characterized in that the air remaining in the inside of the corresponding portion when the lifting member is raised to discharge the outside to the outside. When inflow of wastewater exceeding the unit flow rate of the treatment drainage into the swirl flow chamber, the wastewater that has dropped the contaminants from the centrifugal separation chamber is filtered by the filter member and the perforated plate and then overflowed to the overflow tank through the overflowware. To the backwash water outlet of the double pipe member as a stopper member descending due to the rise of the level of the overflow tank, and the wastewater inside the swirling flow chamber to the double pipe member through a channel opened and closed by water pressure. Draining the filtered wastewater flowing; The backwash water outlet opens as the stopper rises due to the lowering level of the overflow tank when the wastewater inflow stops less than the unit flow amount of the wastewater drainage. A residual wastewater drainage step of discharging wastewater introduced through the backwash water outlet; When the level of the overflow tank is lower than the set level of the overflow tank, the check valve is opened by the rising of the stopper member, so that the level of the overflow tank is drastically lowered, and the residual wastewater in the swirl flow chamber flows into the channel. And a backwashing step of cleaning the filter member by lowering the water level below the filter member in a short time.

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