KR20120140333A - Infiltration trench - Google Patents

Abstract

PURPOSE: An infiltration trench is provided to reduce non-point pollutants in out-flowing water by installing a filter tank, a preprocessing tank, and a collecting well. CONSTITUTION: An infiltration trench comprises a preprocessing tank(10), a collecting well, a filter tank(20), and filtering nets. The preprocessing tank comprises an upper wall(13) and a lower wall(14). An inflow pipe(15) and a bottom(11) with through holes are connected to the upper wall. The lower wall comprises a water transfer hole(16) and an overflow part(17). The collecting well comprises the bottom with the through holes, the water transfer hole, and the overflow part. The collecting well comprises the lower wall that a discharge pipe is connected to the upper wall. The filter tank is installed between the preprocessing tank and the collecting well. The filter tank comprises the bottom with the through holes.

Description

Infiltration trenches

The present invention relates to permeation trenches, more specifically, to reduce nonpoint pollutants contained in rainfall runoff, and to contribute to expanding groundwater by infiltrating treated water with reduced nonpoint pollutants into the ground. In addition, by filtering the contaminants from the pretreatment tank, the load on the filtration tank can be greatly reduced and the filtration efficiency can be greatly improved, and the backwashing can be performed to improve the water quality of the treated water and to extend the maintenance cycle such as replacing the media to obtain economic effects. It's about one penetration ditch.

Generally, pollutants generated in urban areas are divided into point pollution sources and nonpoint pollution sources. Point pollutants are pollutants that have specific emission paths such as household sewage and factory wastewater, which can be expressed as a single point, and their movement paths are clear and easy to handle, but nonpoint sources are city, road, farmland, mountain, construction It refers to a discharge source that emits unspecified water pollutants at an unspecified place.

These nonpoint sources are scattered pollutants, unlike point sources that occur continuously at certain points, such as domestic sewage or factory wastewater, and it is difficult to identify the exact outflow path and the inflow is non-persistent. In particular, it is difficult to collect pollutants and their discharge paths are not clearly distinguished, and it is difficult to collect them. Nonpoint pollutants include earth and sand, nutrients (floating substances, nitrogen and phosphorus), bacteria and viruses, oils and greases, heavy metals, organic substances, pesticides and contaminants.

In addition, non-point source was not recognized as the source of pollutant because the outflow of nonpoint source was concentrated only during rainfall and the source was dispersed in a large area. However, the first-flush runoff, where the non-point pollutants flow out at the early stage of rainfall, has a high concentration of non-point pollutants and particularly high concentrations of heavy metals in urban areas. It is required. That is, the outflow of nonpoint pollutants due to rainfall is very irregular, and contains many kinds of nondegradable nonpoint pollutants. In addition, the fluctuations in the amount of generation and load are large. That is, the fluctuation of flow rate over time is large, and the concentration of nonpoint pollutant increases rapidly at the beginning of rainfall.

Therefore, pollutants such as soil, nutrients and high concentrations of heavy metals, which are spilled with rain from nonpoint sources, are difficult to collect and treat, but if they enter the river without special treatment, they contaminate the water quality. The habitat is destroyed and the hydrological system is disturbed.

In addition, when we look at the characteristics of urban areas, the urbanization and population concentration make our surroundings covered with roads and buildings, making it difficult to lighten or touch the soil that is the source of life. Therefore, when it rains, shoes and clothes no longer need to be wet with muddy water, which is convenient. However, the soft smell of soil and the texture of the soil are far from us, and many benefits that the soil brings have disappeared. In addition, as land development is accelerated due to the progress of urbanization and industrialization, and the area of impermeable layers such as roads, industrial complexes, and residential lands is increased, adverse effects on the water quality of rivers and lakes caused by nonpoint pollutants are increasing.

It also stops here, but when it rains, the rainwater quickly moves along the paved roads and storm pipes, containing many nonpoint pollutants on the roads and flowing into the stream. As the surface is paved, the amount of water that passes through the soil and becomes groundwater gradually decreases and becomes depleted. The plant-based soil of the trees remaining in the parks and gardens is washed away by rainwater and hardened so that it is difficult to support the creatures in the ground and to receive rainwater and send it to the groundwater.

Currently, facilities that reduce non-point pollutants include storage type, infiltration type, vegetation type, device type, and sewage treatment type, but this is to remove specific pollutants contained in contaminated water. Therefore, there is a need for an integrated treatment facility that removes nonpoint pollutants contained in rainfall runoff and leads rainwater runoff from which nonpoint pollutants have been removed to groundwater.

In addition, there is an infiltration trench to reduce the non-point pollutants contained in the conventional rainfall runoff and to contribute to the expansion of the ground water by penetrating the treated water having the reduced non-point pollutants to the basement.

However, the conventional permeate ditch has a problem that the contaminants carried in rainfall runoff containing non-point pollutants are introduced into the filter medium to reduce the filtering efficiency of the filter medium.

In addition, the conventional infiltration ditch has been developed by laminating the filter medium in the pretreatment tank, but the penetration filter has a problem in that the filter material is laminated to the pretreatment tank deteriorates the filtration performance due to the contaminants, it can not perform the function of the actual pretreatment tank, pretreatment There is also a problem that the work to remove the impurities in the tank is very cumbersome.

In addition, since the conventional penetration groove does not have a backwashing function, there is a problem in that the pores of the filter medium are occluded with time, which further lowers the filtration performance.

Therefore, an object of the present invention can reduce nonpoint pollutants contained in rainfall runoff, and also contribute to expanding groundwater by penetrating treated water having reduced nonpoint pollutants into the ground, as well as filtering contaminants from pretreatment tanks. By doing so, it is possible to greatly reduce the load of the filtration tank and to provide a permeation trench for improving the filtration efficiency.

Another object of the present invention is to provide a permeation trench that can filter out contaminants mixed in the water to be treated before entering the filtration tank to improve the filtration performance of the filtration tank and improve the water quality of the treated water.

Another object of the present invention is to backwash the filter media of the filter tank to extend the maintenance time, such as replacement of the filter media, thereby to provide a permeation groove to improve the water quality as well as to obtain an economic effect.

The present invention, in order to achieve the above object, the pre-treatment tank having an upstream wall is connected to the bottom and the inlet pipe is formed with a penetration hole and the downstream wall having a water treatment hole and the overflow portion; A water collecting well having a bottom having an infiltration hole, an upstream wall having a treated water transfer hole, and an upstream portion, and a downstream wall to which a discharge pipe is connected; A penetration tank disposed between the pretreatment tank and the sump well and having a bottom having a penetration hole formed therein, and further comprising a contaminant filtering body for filtering the contaminants mixed in the treatment target water flowing into the pretreatment tank. to provide.

The contaminant filter body is a contaminant filter body which is seated on the bottom of the pretreatment tank; It is installed on the upstream wall of the pretreatment tank and includes a contaminant filtering body for filtering the contaminants from the treated water flowing in the inlet pipe.

A filtration and backwashing perforated tube seated on the bottom of the filtration tank; A backwash sprinkling tube insertion hole formed at a lower end of the downstream wall of the pretreatment tank and the upstream wall of the sump well in correspondence with both ends of the filtration and backwashing hole tube; It further includes a stopper for opening and closing in the backwash water pipe insertion hole.

The present invention can be provided with a pretreatment tank, a filtration tank, and a sump to reduce nonpoint pollutants contained in rainfall runoff, and to contribute to expanding groundwater by infiltrating treated water with reduced nonpoint pollutants into the ground. By filtering the contaminants out of the pretreatment tank, the load on the filtration tank can be greatly reduced, and the filtration efficiency can be improved.

In addition, the present invention is provided with a contaminant filtering body in the pretreatment tank to filter out the contaminants mixed in the water to be treated before the flow into the filtration tank to improve the filtration performance of the filtration tank and improve the water quality of the treated water.

In addition, the present invention is equipped with a filtration and backwashing perforated pipe at the bottom of the filtration tank to improve the filtration effect of contaminants in the process of treating the water to be treated, and to periodically backwash the media, such as maintenance of replacement of the media This can extend the time, thereby improving the water quality and economic effects.

1 to 12 is a view showing a preferred embodiment of the non-point pollutant infiltration ditch of rainfall runoff according to the present invention,
1 is a perspective view,
2 is a partial cutaway perspective view,
3 is a partial incision exploded perspective view,
4 is a plan view
5 is a longitudinal sectional view,
6 to 11 is a longitudinal sectional view showing the operation of the penetration groove according to the present invention,
12 is a processing state diagram illustrating a backwashing process.

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

The penetration trench according to the present invention includes a pretreatment tank 10, a filtration tank 20, and a sump well 30 as shown in FIGS. 1 to 5. The pretreatment tank 10, the filtration tank 20, and the sump 30 are sequentially installed while going from the upstream to the downstream.

The pretreatment tank 10 and the filtration tank 20 and the sump 30 may be installed as a concrete structure by installing the site in place or assembling the blocks manufactured in the factory.

In the case of installation in the field casting method, the front and rear walls are shared by the pretreatment tank 10, the filtration tank 20, and the sump well 30, and the width between the front and rear walls is configured to be kept constant. For the walls, separate descriptions and symbols are omitted.

The pretreatment tank 10 has a bottom 11, an upstream wall 13, and a downstream wall 14, and the sump well 30 has a bottom 31, an upstream wall 33, and a downstream wall 34. Have

The filtration tank 20 has a bottom 21 and shares the downstream wall 14 of the pretreatment tank 10 and the upstream wall 33 of the sump 30 to the upper and downstream walls.

The bottoms 11, 21, 31 of the pretreatment tank 10, the filtration tank 20, and the sump 30 are each independently manufactured as blocks in a factory and assembled in the field, as shown in the example of the drawing. It may be configured as, but when installed in the field pouring method may be composed of a single floor.

A plurality of penetration holes 12, 22, 32 are formed in the bottoms 11, 21, 31 of the pretreatment tank 10, the filtration tank 20, and the sump 30.

An inlet pipe 15 is connected to the upstream wall 13 of the pretreatment tank 10. The downstream wall 14 of the pretreatment tank 10 is provided with an intermediate treatment object water transfer hole 16 and an upper treatment object water overflow portion 17.

The treatment target water transfer hole 16 is for transferring the treatment target water pretreated in the pretreatment tank 10 to the filtration tank 20, and is approximately an intermediate portion of the downstream wall 14 of the pretreatment tank 10. Is perforated.

The treatment object water overflowing unit 17 is configured to overflow the treatment object water flowing into the filter tank 20 when a large amount of treatment object water flows into the pretreatment tank 10. By forming lower than the upstream wall 13, it is the part formed on the upper end of the said downstream wall 14. As shown in FIG.

An internal space of the pretreatment tank 10 is provided with a contaminant filtering body for filtering the contaminants mixed in the treatment target water flowing through the inlet pipe 15.

The contaminant filter body includes a contaminant filter body 40 seated on the bottom 11 of the pretreatment tank 10.

The contaminant filter body may further include a contaminant filter body 50 that is detachably installed on an inner surface of the upstream wall 13 of the pretreatment tank 10.

The contaminant filter body 40 is to filter the contaminants that are mixed in the water to be treated already introduced into the pretreatment tank 10 so that the contaminants do not flow into the filtration tank 20, the contaminant filter body 50 is In the inlet pipe 15 to filter the contaminants from the water to be treated to the pre-treatment tank 10 in the inlet step.

The contaminant filter body 40, 50 is formed in a box shape with an upper surface open, the bottom and four walls forming the member may be formed of a perforated plate, a net board, or a metal lath. Handles (41, 51) for handling the contaminant filtering body (40, 50).

The contaminant filter body 50 is installed on the bracket 52 attached to the contaminant filter body 50 and protrudes from an inner surface of the upstream wall 13 of the pretreatment tank 10 to penetrate the bracket 52. The anchor bolt 53 and the nut 54 fastened to the anchor bolt 53 are detachably installed on the upstream wall 13 of the pretreatment tank 10.

Inside the filtration tank 20 is filled with a filter medium 60 for filtering the water to be treated after pre-treatment in the pre-treatment tank 10.

The filter medium 60 may be composed of only a gravel layer, or may be composed of a gravel layer and a sand layer, or a gravel layer and a sand layer and an insulasite layer.

A discharge pipe 35 is connected to the downstream wall 34 of the sump 30. The upstream wall 33 of the sump 30 is formed with a middle treatment water transfer hole 36 and an upper treatment water overflow 37.

The treatment water transfer hole 36 is for transferring the treatment target water pre-treated in the filtration tank 20 to the water collecting well 30, and is approximately at an intermediate portion of the upstream wall 33 of the water collecting well 30. Perforated.

The treatment water overflowing part 37 is for flowing the treatment object water flowing in when the large amount of treatment object water flows into the filtration tank 20 to the collection well 30, and the upstream wall 33 is downstream. By forming lower than the wall 34, the upper portion of the upstream wall 33 is formed.

On the bottom 21 of the filtration tank 20 is provided with a hole 70 for filtration and backwash. Only one hole tube 70 may be installed or several may be installed at a predetermined interval. In the city example, an example is provided with one hole.

The downstream wall 14 of the pretreatment tank 10 and the lower end of the upstream wall 33 of the sump 30 have a backwashing water pipe insertion hole corresponding to both ends of the filtration and backwashing hole 70. (71) 72 are formed. The back flushing sprinkling tube insertion hole (71) 72 is normally kept in a blocked state by a stopper (73) (74).

The stoppers 73 and 74 are preferably provided with stopper handles 75 and 76 so that they can be used to handle the stoppers 73 and 74. The stopper handles 75 and 76 may be formed in a ring shape as shown in the example. However, the stopper handles 75 and 76 may be inserted into or removed from the backwashing water pipe insertion holes 71 and 72. Any form can be used as long as the work can be easily performed.

The contaminant filtering body 40 is formed with a cut hole 42 corresponding to the back flushing sprinkling tube insertion hole 71 and the stopper 73 formed in the downstream wall 14 of the pretreatment tank 10.

The contaminant filtering body 50 is formed with a cutout 55 corresponding to the inlet pipe 15. The cutout 55 is preferably formed to correspond to the lower half of the inlet pipe 15.

In the drawings, reference numerals 18 and 38 denote metal gratings installed on the upper ends of the pretreatment tank 10 and the sump 30, respectively, and 80 are installed on the ground to install the penetration groove according to the present invention. It is a crushed stone layer.

Hereinafter, the operation of the penetration groove according to the present invention will be described.

The penetration groove according to the present invention has a backwashing water pipe insertion hole 71 formed at the lower end of the downstream wall 14 of the pretreatment tank 10 and the upstream wall 33 of the sump well 30 in the initial installation state. Closing the sprinkling water pipe insertion hole 72 formed at the lower end of the stopper (73) (74) respectively.

As shown in FIG. 6, when the initial amount of rainfall is small in the amount of the water to be introduced into the pre-treatment tank 10 through the inlet pipe 15, the water level in the pre-treatment tank 10 is the water to be treated. Since it is lower than the conveying hole 16, the water to be treated cannot flow into the filtration tank 20, and remains only in the pretreatment tank 10.

Here, the water to be treated through the inlet pipe 15 is mixed with the water to be treated while passing through the filter medium 50 detachably installed on the inner surface of the upstream wall 13 of the pretreatment tank 10. The contaminants that are filtered by the contaminant filtering body 50 and mixed in the water to be treated introduced into the pretreatment tank 10 are filtered by the contaminant filtering body 40 seated on the bottom 11. .

Therefore, it is possible to prevent the deterioration of the filtration performance by the contaminants when the water to be treated later is transferred to the filtration tank 20 and filtered.

The treated water filtered through the contaminants penetrates underground through the penetration hole 12 and the crushed stone layer 80 formed in the bottom 11 and is stored as groundwater.

As the rainfall continues and the amount of inflow water increases, as shown in FIG. 7, when the water level in the pretreatment tank 10 reaches the height of the water treatment hole 16, the treatment target in the pretreatment tank 10. Water is introduced into the filtration tank 20 through the water treatment hole 16.

The treated water introduced into the filtration tank 20 is filtered by the filter medium 60 filled in the filtration tank 20 to remove contaminants contained in the treated water.

In addition, the water to be treated passes through a plurality of through-holes formed in the filtration and backwashing oil hole pipe 70 seated on the bottom 21 of the filtration tank 20, the filtration effect is also made.

The treated water filtered by the filter medium 60 penetrates underground through the penetration hole 22 formed in the bottom 21 of the filtration tank 20 and the crushed stone layer 80.

At this time, while the water level in the filtration tank 20 is lower than the height of the treatment object water transfer hole 35 formed in the upstream wall 33 of the collecting well 30, the treated water in the filtration tank 20 is the collecting well 30. As described above, the above-described penetrating action is performed while remaining only in the pretreatment tank 10 and the filtration tank 20.

As the rainfall continues and the amount of inflow water increases, as shown in FIG. 8, the water level in the filtration tank 20 reaches the height of the treated water transfer hole 36 formed in the upstream wall 33 of the sump 30. If so, the treated water in the filtration tank 20 is introduced into the sump 30 through the treated water transfer hole (36).

The treated water introduced into the sump 30 is treated water introduced into the sump 30 through the infiltration hole 32 and the crushed stone layer 80 formed in the bottom 31 of the sump 30. Will penetrate underground.

At this time, while the water level in the sump 30 is lower than the height of the discharge pipe 35 connected to the downstream wall 340 of the sump 30, the treated water in the sump 30 is not discharged to the outside, the pretreatment The above-described penetrating action is achieved while remaining only in the tank 10, the filtration tank 20, and the sump well 30.

As the rainfall continues, the amount of inflow into the pretreatment tank 10 increases, so that the water level in the pretreatment tank 10 is formed at the upper end of the downstream wall 14 of the pretreatment tank 10, as shown in FIG. 9. When the water flow reaches the height of the water flow section 17, the water to be treated in the pretreatment tank 10 flows through the water flow passage 17 to be treated and flows into the filtration tank 20.

At this time, while the water level in the filtration tank 20 is lower than the height of the treated water overflow portion 37 formed on the upper wall 33 of the sump 30, the treated water in the filtration tank 20 is transferred to the treated water Only through the ball 36 is introduced into the sump (30).

As the rainfall continues and the amount of inflow water increases and the water level in the sump 30 reaches the height of the discharge pipe 35 as shown in FIG. 10, the treated water in the sump 30 is discharged to the discharge pipe 35. It is discharged to outside through).

As the rainfall continues and the amount of inflow water increases, as shown in FIG. 11, the water level in the pretreatment tank 10 becomes higher than the height of the water subject to overflow the treated water 17, and the water level in the filtration tank 20 becomes the treatment. When the height of the water overflowing unit 37 becomes higher than the height of the water treatment unit 10, the treatment target water of the pretreatment tank 10 flows over the treatment target water overflowing unit 17, and the treated water of the filtration tank 20 is the treatment water overflowing unit. Overflow of (37).

In this state, the infiltration and the discharge action are made as described above.

When the rainfall stops and the water level in the pretreatment tank 10, the filtration tank 20 and the sump 30 is lowered, the action for each situation described above is made according to the water level.

On the other hand, if the above-described action is repeatedly performed after installation, the filter medium 60 filled in the filtration tank 20 may be blocked by the pores of various contaminants and suspended solids, in this case for the filtration and backwash By backwashing using the perforated pipe 70, it is possible to extend the maintenance time, such as replacement of the filter medium 60, thereby improving the quality of the water as well as to obtain an economic effect.

That is, when the rainfall stops and there is no water to be treated or water to be treated in the pretreatment tank 10, the filtration tank 20, and the sump 30, or in the state where the water level is the lowest, as shown in FIG. Backwashing sprinkling tube insertion hole 71 formed at the lower end of the downstream wall 14 of the tank 10 or backwashing sprinkling tube inserting hole 72 formed at the lower end of the upstream wall 33 of the sump 30. Take off any one or both of the stopper (73) or (74) blocking the back, and the back flushing sprinkling tube (90) through the back flushing water pipe insertion hole (71, 72) is inserted into the backwash water When the water is sprayed at a high pressure, the backwash water is sprayed into the pores of the media 60 in the filtration tank 20 through the through holes of the filtration and backwashing hole 70 and contaminants collected in the pores of the media 60. And suspended solids escape from the voids.

As water from the backwashing water continues, the water level in the pretreatment tank 10 and the sump 30 is raised as well as the filtration tank 20. The material floats on the surface of the water, and part of the material is discharged to the outside together with the backwash water discharged through the discharge pipe 35.

At this time, not all of the pollutants and suspended solids escaping from the pores of the filter medium 60 are discharged to the outside, but once the pollutants and suspended solids collected in the pores of the filter medium 60 have escaped, the filtering function is performed. This can be done efficiently and improve the water quality.

Periods of regular replacement or maintenance of media can be extended, resulting in economic benefits.

In FIG. 12, the backwashing sprinkling tube insertion hole 71 formed in the downstream wall 14 of the pretreatment tank 10 is closed with a stopper 73, and the reverse formed in the upstream wall 33 of the sump 30. Backwashing water sprinkling pipe 90 is inserted into the back of the wash sprinkling pipe (72) is an example of backwashing, but both sides backwashing sprinkling pipe insertion holes (71, 72) to open both sides for backwashing The backwash water pipes 90 may be inserted into the sprinkling pipe insertion holes 71 and 72 to spray the backwash water.

The present invention has been described above with reference to the illustrated drawings as a preferred embodiment, but the present invention is not limited by the embodiments and drawings presented in the present specification, and those skilled in the art within the scope of the technical features of the present invention. Of course, various modifications may be made.

10: pretreatment tank 20: filtration tank
30: sump crystal 40, 50: contaminant filtering body
60: filter medium 70: perforated pipe for filtration and backwash
90: backwash water pipe

Claims (3)

A pretreatment tank having an upstream wall to which a penetration hole is formed and an inlet pipe connected thereto, and a downstream wall having a treatment target water transfer hole and a overflow portion;
A water collecting well having a bottom having an infiltration hole, an upstream wall having a treated water transfer hole, and an upstream portion, and a downstream wall to which a discharge pipe is connected;
It is installed between the pretreatment tank and the sump and includes a filtration tank having a bottom formed with a penetration hole,
It is installed in the pre-treatment tank further comprises a contaminant filtering body for filtering the contaminants mixed in the treated water flowing in.
The method of claim 1,
The contaminant filter body is a contaminant filter body which is seated on the bottom of the pretreatment tank;
It is installed in the upstream wall of the pre-treatment tank, the penetration groove characterized in that it comprises a contaminant filtering body for filtering the contaminants from the treated water flowing in the inlet pipe.
The method of claim 1,
A filtration and backwashing perforated tube seated on the bottom of the filtration tank;
A backwash sprinkling tube insertion hole formed at a lower end of the downstream wall of the pretreatment tank and the upstream wall of the sump well in correspondence with both ends of the filtration and backwashing hole tube;
Infiltration ditch, characterized in that it further comprises a stopper for opening and closing in the backwash spray pipe insertion hole.

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