KR102519316B1 - Non-point pollution treatment facilities - Google Patents

Abstract

The present invention relates to a facility for reducing a water pollutant unspecifically discharged from a place, such as a city, a road, a farmland, a mountain land, a construction site, and the like. The present invention realizes a new type of non-point pollution treatment facility filtering impurities, such as a coarse solid and the like contained in rainwater by using a multi-module screen during a process of discharging initial rainwater after guiding the initial rainwater to the non-point pollution treatment facility and treating the initial rainwater before discharging the initial rainwater flowing into a storm sewer along the surface of the road in case of rain to a discharge zone. The multi-module screen comprises a first screen distributing plate, a second screen distributing plate, and an inner screen module having the shape of an empty square block. The non-point pollution treatment facility can improve the purification efficiency of rainwater, for example, effectively treating the impurities remaining in the initial rainwater.

Description

Non-point pollution abatement facilities {NON-POINT POLLUTION TREATMENT FACILITIES}

The present invention relates to a non-point pollution reduction facility, and more particularly, to a facility for reducing water pollutants discharged unspecified from places such as cities, roads, farmlands, mountains, and construction sites.

In general, in areas paved with concrete or asphalt, rainwater permeation or retention function deteriorates during rainfall, and polluted substances are leaked into water systems such as nearby sewers or rivers due to early rainfall, adversely affecting water systems.

For example, when non-point pollution sources included in initial rainwater flow into public waters, they cause contamination of rivers and lakes, and also infiltrate into the ground to become a factor in causing contamination of groundwater resources.

Therefore, the pollutants that flow in with the initial rainwater must be discharged to the discharge area through a treatment and removal process, and the equipment that treats the nonpoint pollutants that flow in with the initial rainwater is a natural facility (reservoir, artificial wetland, Infiltration facilities), device-type facilities (filtration facilities, vortex-type facilities, screen-type facilities, flocculation/precipitation treatment-type facilities, biological treatment-type facilities), and other facilities.

The infiltration facility or storage facility, which is called the natural non-point pollution reduction technology, has advantages in terms of installation, but has a disadvantage in occupying a lot of land.

The filtering type nonpoint pollution reduction facility has the advantage of requiring a smaller site area and faster processing speed than the natural type, but has the disadvantage that the filtering facility requires maintenance such as regular cleaning and replacement of filter media.

The non-point pollution reduction facility is a facility that usually treats pollutants caused by initial rainfall of about 2.5 to 15.0 mm per hour. Since the rainfall thereafter is generally clean, it is immediately discharged without flowing into the non-point pollution reduction facility, and when the rainfall ends After backwashing the filter media with water or air within a certain period of time, the backwashing water is transported to a sewage pipe in a nearby area for treatment in connection with a sewage treatment plant, etc. It is a trend that has been applied a lot recently because it can be processed.

However, the existing non-point pollution abatement facilities still require improvement from comprehensive viewpoints such as purification performance, lifespan, maintenance and repair, workability, and cost.

Publication No. 10-2010-0086610 Publication No. 10-2016-0072555 Registered Patent Publication No. 10-1764398 Registered Patent Publication No. 10-1812917

Therefore, the present invention was devised in view of this point, and in the process of inducing and treating the initial rainwater flowing into the rainwater pipe along the road surface when rainfall occurs to the non-point pollution reduction facility before discharging it to the discharge area, and then discharging it, A new type of boiling point that filters impurities such as coarse solids contained in rainwater by using a multi-module screen consisting of a combination of a primary screen rectifying plate, a secondary screen rectifying plate, and a hollow square block-shaped inner screen module. An object of the present invention is to provide a non-point pollution reduction facility capable of improving the purification efficiency of rainwater, such as effectively treating impurities remaining in initial rainwater by implementing a pollution reduction facility.

In order to achieve the above object, the non-point pollution reduction facility provided by the present invention has the following characteristics.

The non-point pollution reduction facility is a water tank having an inlet pipe connected to a rainwater collecting tank, an outflow pipe connected to a rainwater pipe, and a maintenance manhole that allows entry and exit, installed inside the tank to filter impurities contained in the influent Includes a multi-module screen.

In particular, the multi-module screen of the non-point pollution reduction facility has a screen body in the form of a square case with a discharge pipe connected to the outlet pipe at the rear of the upper surface, and a plurality of primary perforated holes on the front portion of the screen body. It has a primary screen rectifying plate installed vertically and a plurality of secondary perforated holes having a relatively small diameter compared to the primary perforated hole, and vertically installed side by side at regular intervals right behind the primary screen rectifying plate It can be composed of a secondary screen rectifying plate and an internal screen module formed in the form of a hollow square block and installed behind the secondary screen rectifying plate from the inside of the screen body.

Here, the first perforated hole of the first screen rectifying plate and the second perforated hole of the second screen rectifying plate are formed in a lattice-like arrangement structure in which five and a row are aligned over the entire area of the rectifying plate to enter the inside of the screen body. It is desirable to ensure that influent water enters while being evenly distributed over the entire front area of the screen body.

At this time, the first perforated hole of the first screen rectifying plate and the second perforated hole of the second screen rectifying plate may be coaxially arranged.

The internal screen module of this non-point pollution reduction facility is a multi-perforated mesh network forming an outer frame in the form of a square block, and a grid while vertically and horizontally wrapping the outer circumference of the front and rear surfaces, upper and lower surfaces, and left and right surfaces of the multi-perforated mesh network. It may include several lines of wire forming a net shape.

Also, a cover for maintenance that can be opened and closed may be installed on the upper surface of the screen body.

As a preferred embodiment, the non-point pollution reduction facility is installed vertically upwards in the curved section of the discharge pipe to collect treated water passing through the discharge pipe and to make the inside of the discharge pipe an atmospheric pressure condition. A pressure equalization gate may be further included.

At the upper end of the water sampling and pressure equalization gate, a check valve to prevent the inflow water in the tank from flowing back into the discharge pipe may be installed, and the water sampling and pressure equalization gate is in the form of a pipe having a relatively small diameter compared to the diameter of the discharge pipe. can be made with

The non-point pollution reduction facility provided by the present invention has the following effects.

First, after the contaminated influent enters the tank and undergoes primary precipitation inside the tank, when the water level rises due to the continuous inflow of contaminated water, the coarse contaminants remaining in the influent through the multi-module screen installed inside the tank By filtering (solids) and discharging the treated water, there is an effect of improving the purification efficiency of rainwater, such as effectively treating impurities remaining in the initial rainwater.

Second, by using the primary screen rectifying plate and the secondary screen rectifying plate disposed on the front side of the multi-module screen to evenly distribute the flow rate of contaminated water, the polluted water is evenly introduced into the multi-module screen, resulting in a multi-module screen There is an effect of maximizing the functionality of the multi-module screen, such as filtering impurities by utilizing the entire area of the screen.

Third, by providing a water sampling and pressure equalization gate on the discharge side of the multi-module screen, it is possible to facilitate the water collection operation, such as accurately and conveniently checking the treatment efficiency of the non-point pollution reduction facility after the end of the rain, and also to ensure that the treated water is discharged. Smooth flow of treated water can be ensured by making the pressure inside the pipe equal to atmospheric pressure, and even if the water level in the tank rises by using the check valve installed on the upper part of the water inlet, contaminated water can be discharged through the water inlet. There is an effect of preventing untreated contaminated water from being discharged as it is, such as being able to prevent it from being discharged as it is.

Fourth, by providing a cover for maintenance on the upper part of the multi-module screen, there is an effect of facilitating maintenance and reducing maintenance costs, such as reducing cleaning costs and at the same time reducing cleaning time.

1 to 3 are a front view, a plan view and a side view showing a non-point pollution reduction facility according to an embodiment of the present invention
4 and 5 are perspective views showing a multi-screen module of a non-point pollution reduction facility according to an embodiment of the present invention.

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

1 to 3 are front views, plan views, and side views illustrating a non-point pollution reduction facility according to an embodiment of the present invention, and FIGS. 4 and 5 are multi-screen modules of a non-point pollution reduction facility according to an embodiment of the present invention. is a perspective view that represents

As shown in FIGS. 1 to 5, the non-point pollution reduction facility filters and purifies the initial rainwater flowing into the rainwater collection tank 100 along the road surface when rainfall occurs, and then sends it to the rainwater pipe 110 again to discharge it It is a facility.

To this end, the non-point pollution reduction facility includes a water tank 13 as a means for inducing and retaining the rainwater collected in the rainwater collection tank 100 and then discharging the rainwater that has been purified and discharged to the rainwater pipe 110 again.

The water tank 13 is a concrete structure constructed at a certain depth in the ground, for example, a rectangular concrete structure constructed at a relatively deep depth compared to the rainwater collection tank 100 as well as the rainwater pipe 110. A maintenance manhole 12 and a ladder 25 for the entry and exit of workers are provided.

In addition, the inlet pipe 10 extending from the rainwater collecting tank 100 is connected to one wall of the water tank 13, and the outlet pipe 11 extending to the rainwater pipe 110 is connected to the other wall.

At this time, the inlet pipe 10 is connected to the bottom of the rainwater collection tank 100, which is lower than the height of the weir 120 installed inside the rainwater collection tank 100, so that the rainwater in the rainwater collection tank 100 When discharged to the rainwater pipe 110 beyond the weir 120, it can be sent to the water tank 13 after being guided to the inlet pipe 10 before this.

Accordingly, the rainwater entering the rainwater collecting tank 100 is guided through the inlet pipe 10 and flows into the inside of the water tank 13, and then undergoes primary precipitation in the water tank 13, and then continuously When the water level rises due to the inflow, the coarse contaminants (solids) contained in the inflow water are filtered through the multi-module screen 14 installed inside the water tank 13, and then the outflow pipe 11 It is induced along and can be discharged into the rain pipe (110).

In addition, the non-point pollution reduction facility is installed inside the water tank 13 and includes a multi-module screen 14 as a means for filtering impurities contained in the inflow water.

The multi-module screen 14 includes a primary screen rectifying plate 18, a secondary screen rectifying plate 20, and an internal screen module 21 sequentially disposed from the front as well as a screen body 16 accommodating them. include

The screen body 16 is formed in the form of a square case, and the screen body 16 is installed on the inner bottom of the water tank 13.

In addition, an upward discharge pipe 15 is formed behind the upper surface of the screen body 16, and the discharge pipe 15 formed in this way is connected to the outlet pipe 11 through a curved section upward and downward at the same time. Is connected to the inside of the inner screen module (21).

Accordingly, the inflow water entering the inside of the internal screen module 21, that is, the inflow water purified through the impurity filtering process is sent to the outflow pipe 11 through the discharge pipe 15 and then discharged to the rainwater pipe 110. do.

In addition, a cover 22 for maintenance that can be opened and closed is installed on the upper surface of the screen body 16 .

Accordingly, the operator opens the cover 22 for maintenance and cleans the inside of the screen body 16 as well as the internal screen module 21 installed inside the screen body 16 and the primary screen rectifying plate 18. ), it is possible to easily perform tasks such as washing, inspecting, or repairing the secondary screen rectifying plate 20.

The primary screen rectifying plate 18 serves to primarily filter impurities in the influent, and is made in the form of a square plate made of metal or the like in which a plurality of primary perforated holes 17 are formed. The primary screen rectifying plate 18 is installed vertically at the frontmost front part of the screen body 16.

At this time, the primary screen rectifying plate 18 has a structure that is detachably inserted into both wall surfaces of the screen body 16 by guide means such as rails, or a structure that is fixed to both wall surfaces of the screen body 16 by welding, etc. can be installed with

In addition, the primary perforated holes 17 of the primary screen rectifying plate 18 may be formed in a lattice-like arrangement structure in which five and a row are aligned over the entire area of the rectifying plate, and accordingly, the primary screen rectifying plate ( The inflow water entering the inside of the screen body 16 through the primary perforated holes 17 of 18) can enter while being equally distributed over the entire front area of the screen body through each primary perforated hole 17, As a result, the efficiency of filtering impurities can be increased by equal distribution of inflow water.

In addition, each of the primary perforated holes 17 in the primary screen rectifying plate 18 is coaxial with each of the secondary perforated holes 19 in the secondary screen rectifying plate 20 in a one-to-one matching structure, It can be arranged, and accordingly, it is possible to secure a smooth flow of influent water.

Here, the diameter of the primary perforated hole 17 can be set to a diameter of about 50 mm, and this primary perforated hole 17 is a rectifying plate when the size of the primary screen rectifying plate 18 is 400 × 400 mm. It is desirable to install about 50 of them over the entire area.

The secondary screen rectifying plate 20 serves to primarily filter out contaminants in the influent, compared to a plurality of secondary perforated holes 19, for example, primary perforated holes 17. It is made in the form of a square plate made of metal or the like in which a secondary perforated hole 19 of a relatively small diameter is formed. It is installed vertically in parallel with it at regular intervals immediately behind the rectifying plate 18.

At this time, the secondary screen rectifying plate 20 has a structure that is detachably inserted into both wall surfaces of the screen body 16 by guide means such as rails, or a structure that is fixed to both wall surfaces of the screen body 16 by welding, etc. can be installed with

In addition, the secondary perforated holes 19 of the secondary screen rectifying plate 20 may be formed in a lattice-like arrangement structure in which five and a row are aligned over the entire area of the rectifying plate, and accordingly, the secondary screen rectifying plate ( The inflow water entering the inside of the screen body 16 through the secondary perforated holes 19 of 20) can enter while being equally distributed over the entire front area of the screen body through each of the secondary perforated holes 19, As a result, the efficiency of filtering impurities can be increased by equal distribution of inflow water.

In addition, each of the secondary perforated holes 19 in the secondary screen rectifying plate 20 is coaxial with each of the primary perforated holes 17 in the primary screen rectifying plate 18 in a one-to-one matching structure, It can be arranged, and accordingly, it is possible to secure a smooth flow of influent water.

Here, the diameter of the secondary perforated hole 19 can be set to a diameter of about 30 mm, and this secondary perforated hole 19 is a rectifying plate when the size of the secondary screen rectifying plate 20 is 400 × 400 mm. It is desirable to install about 50 of them over the entire area.

The internal screen module 21 serves to secondarily filter impurities that are not filtered through the primary screen rectifying plate 18 and the secondary screen rectifying plate 20, and the internal screen module 21 is formed in the form of a hollow square block and is installed from the inside of the screen body 16 to the rear of the secondary screen rectifying plate 20 at regular intervals.

At this time, the internal screen module 21 can be detachably installed on the bottom side of the screen body 16 while maintaining a certain distance from the ceiling side as well as the wall side of the screen body 16 .

In addition, the inner screen module 21 may be formed by combining a multi-perforated mesh network 21a and several lines of wires 21b. At this time, the multi-perforated mesh network 21a is a square block with an empty inside. It is made of a frame structure of the form, and the wire 21b is in the form of a multi-perforated mesh network 21b while wrapping the outer circumference of the front and rear surfaces, upper and lower surfaces, and left and right surfaces of the multi-perforated mesh network 21a in vertical and horizontal directions. It is possible to form a lattice network that holds the

Accordingly, impurities that have not been filtered through the primary screen rectifying plate 18 and the secondary screen rectifying plate 20 proceed to the internal screen module 21 together with the influent, and the impurities in the influent thus progressed are transferred to the internal screen. It is filtered by the module 21, that is, impurities are blocked on the outer circumference of the inner screen module 21 and cannot enter the inside, and eventually the inside of the inner screen module 21 is clean with impurities removed. Only treated water can flow in.

In particular, the non-point pollution reduction facility includes a water sampling and pressure equalization gate 23 as a means for verifying the treatment efficiency of the non-point pollution reduction facility after the end of rainfall and creating atmospheric pressure conditions for smooth inflow water flow.

The water sampling and pressure equalizing gate 23 is made in the form of a circular tube having a relatively smaller diameter than the discharge pipe 15, and the water sampling and pressure equalizing gate 23 is located on the upper side of the curved section of the discharge pipe 15. installed vertically.

Accordingly, the worker can accurately and conveniently collect the treated water from the water sampling and pressure equalization gate 23 after the end of the rain.

For example, after a worker enters the water tank after the end of the rain, the water sampling and pressure equalization gate 23 positioned higher than the water level in the water tank 13 (eg, the water level at which the inflow water is filled to the height of the outflow pipe and the discharge pipe) By putting a bellows or the like in the water collection system, the water sampling operation can be performed accurately and conveniently compared to the conventional method of scooping water with a gourd or the like from the rainwater pipe 110.

The treated water collected in this way (eg, treated water that has passed through the primary screen rectifying plate, the secondary screen rectifying plate, and the internal screen module) and the influent (eg, the primary screen rectifying plate, the secondary screen rectifying plate, and the internal screen module before passing through It is possible to check the treatment efficiency of the non-point pollution abatement facility by measuring the pollution level between the inflow water).

In addition, by making the inside of the discharge pipe 15 an atmospheric pressure condition using the water sampling and pressure equalization gate 23, that is, by allowing the inside of the discharge pipe 15 and the inside of the water tank 13 to communicate with each other, the discharge pipe 15 ) through which the discharge of the treated water can be made smoothly.

For example, by placing a water sampling port on the discharge side of the multi-module screen 14 installed inside the water tank 13, it is possible to easily collect the treated water after the end of the rain, while processing in the multi-module screen 14 When the water is discharged to the outside, the discharge pipe 15 is in the form of a bend pipe, so the flow of treated water is not smooth due to the pressure inside the pipe. By creating the same atmospheric pressure as the outside (inside the water tank), the treated water can be discharged smoothly without clogging in the discharge pipe (15).

In addition, a check valve 24 is installed at an upper end of the water sampling and pressure equalizing gate 23 to prevent the inflow water in the water tank 13 from flowing back into the discharge pipe 15.

That is, even if the water level in the tank 13 rises due to an excessive increase in the inflow water (contaminated water) entering the water tank 13, the check valve 24 on the top of the water sampling and pressure equalization gate 23 The upper end of the pressure equalization gate 23 is closed, and accordingly, even if the water level rises to the point where the water sampling and pressure equalization gate 23 is locked, inflow water is prevented from entering the water sampling and pressure equalization gate 23, and consequently untreated contamination. It is possible to prevent water from being discharged through the discharge pipe (15).

At this time, the check valve 24 of the water sampling and pressure equalization gate 23 is installed in a state in which it can be opened and closed by a hinge structure, and is normally always open, and when the water level rises, it can be closed by the pressure of water do.

Here, the check valve 24 is normally open by installing a spring (not shown) in the hinge structure, for example, a spring having elasticity to the extent that the check valve can be erected upward and pressed by the pressing force of water It can be retained, or it can be opened with a slight tilt to the rear (to the open side) relative to the vertical line at the time of installation.

Therefore, the process of filtering impurities in rainwater using the non-point pollution reduction facility configured as described above is as follows.

First, when rainfall occurs, rainwater flowing along the road surface (for example, rainwater mixed with various impurities) enters the rainwater collection tank 100, and the rainwater entering the inside of the rainwater collection tank 100 in this way flows through the inlet pipe 10. It flows into the inside of the water tank 13 through.

Next, soil and sand mixed in the inflow water entering the water tank 13 are deposited on the inner bottom of the water tank 13, and the inflow water mixed with impurities continues toward the multi-module screen 14.

Next, the influent and impurities flowing toward the multi-module screen 14 pass through the first screen rectifying plate 18 → the second screen rectifying plate 20 → the internal screen module 21 in sequence, and during this process, the influent The mixed impurities are sequentially filtered by the primary screen rectifying plate 18, the secondary screen rectifying plate 20 and the internal screen module 21.

Next, treated water that has passed through the multi-module screen 14 exits along the discharge pipe 15, is guided through the outlet pipe 11, and is discharged to the rainwater pipe 110.

As such, in the present invention, a new non-point pollution reduction facility that filters impurities such as coarse solids contained in rainwater by using a multi-module screen consisting of a combination of a primary screen rectifying plate, a secondary screen rectifying plate, and an internal screen module is provided. By providing the rainwater, it is possible to improve the purification efficiency of rainwater, such as being able to effectively treat impurities remaining in the initial rainwater.

10: inlet pipe
11: outflow pipe
12: Manhole for maintenance
13: water tank
14: multi-module screen
15: discharge pipe
16: screen body
17: 1st perforated hole
18: primary screen rectifying plate
19: 2nd perforated hole
20: secondary screen rectifying plate
21: internal screen module
21a: multi-perforated mesh network
21b: wire
22: cover for maintenance
23: water sampling and pressure equalization gate
24: reverse disaster
25 : Ladder

Claims (8)

A water tank 13 having an inlet pipe 10 connected from the rainwater collecting tank, an outflow pipe 11 connected to the rainwater pipe, and a maintenance manhole 12 that allows entry and exit, installed inside the water tank 13 It includes a multi-module screen 14 that filters impurities contained in the influent,
The multi-module screen 14 has a discharge pipe 15 connected to the outlet pipe 11 at the rear of the upper surface, a screen body 16 formed in the form of a square case, and a plurality of primary perforated holes 17. The primary screen rectifying plate 18 installed vertically on the front side of the screen body 16 while having a plurality of secondary perforated holes 19 having a relatively small diameter compared to the primary perforated holes 17 It consists of a secondary screen rectifier 20 installed vertically in parallel at regular intervals right behind the primary screen rectifier 18, and a hollow square block form inside the screen body 16. It consists of an internal screen module 21 installed behind the car screen rectifying plate 20,
Water sampling and pressure in the form of a tube that is installed vertically upward in the curved section of the discharge pipe 15 to collect treated water passing through the discharge pipe 15 and to make the inside of the discharge pipe 15 an atmospheric pressure condition. Non-point pollution reduction facility, characterized in that it further comprises an equal gate (23).
The method of claim 1,
The first perforated hole 17 of the first screen rectifying plate 18 and the second perforated hole 19 of the second screen rectifying plate 20 have a lattice arrangement structure in which five and a row are aligned over the entire area of the rectifying plate. Formed as, non-point pollution reduction facility characterized in that the inflow water entering the inside of the screen body 16 can enter while being equally distributed over the entire front area of the screen body.
The method of claim 2,
Non-point pollution reduction facility, characterized in that the primary perforated hole 17 of the primary screen rectifying plate 18 and the secondary perforated hole 19 of the secondary screen rectifying plate 20 are arranged coaxially.
The method of claim 1,
The inner screen module 21 has a multi-perforated mesh network 21a constituting an outer frame in the form of a square block, and the outer circumference of the front and rear surfaces, upper and lower surfaces, and left and right surfaces of the multi-perforated mesh network 21a in the vertical and horizontal directions. Non-point pollution reduction facility characterized in that it comprises several lines of wires (21b) forming a lattice network while being wrapped with.
The method of claim 1,
A non-point pollution reduction facility, characterized in that a cover 22 for maintenance that can be opened and closed is installed on the upper surface of the screen body 16.
delete The method of claim 1,
A non-point pollution reduction facility, characterized in that a check valve 24 is installed at the upper end of the water sampling and pressure equalization gate 23 to prevent the inflow water in the water tank 13 from flowing back into the discharge pipe 15.
The method of claim 1,
The water sampling and pressure equalization gate 23 is a non-point pollution reduction facility, characterized in that made in the form of a pipe having a relatively small diameter compared to the diameter of the discharge pipe (15).

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