KR200253332Y1 - a rivers the quality of water purgation equipment by a riverbed filtering - Google Patents

Abstract

In order to purify contaminated water in rivers, waterways, and reservoirs, this proposal installs a filtration facility consisting of a sand layer and a gravel layer with gratings on the bottom of the stream or waterway to purify the water quality by passing the contaminated water vertically through this filtration facility. Apparatus and method, the configuration of which is to make a concrete filter filling structure (11) having an open top in the flow direction under the stream bottom channel, the prefabricated blocking water gate mount 18 in the inlet of the upstream inlet to the water gate (19) A plurality of catching holes 13 are formed at the bottom of the downstream wall 14a so as to be opened and closed, and behind the downstream wall, a catch 14 is installed and provided with a plurality of overflow pipes 15 at a predetermined height. It is manufactured on a scale that can be accessed by a person for management, while the inside of the filter medium filling structure 11 has the largest particle size at the bottom. Fill the gravel layer 25a horizontally and sequentially fill the gravel layer 25b having a smaller particle size as it goes up to the upper part, but the gravel having a small particle size stacked on the top is a gravel of a size that does not fall between the pores of the gravel layer stacked on the bottom. Form the used gravel layer 25 and form a sand layer 21 having a depth of 0.3 ~ 1m at the top and then buried the grating cover 22 made of a short interval so that the sand layer 21 is located at right angles to the water flow direction. It is a river water purification device by river filtration. First, there is no need for a separate site for installing water purification facilities in rivers or reservoirs, and secondly, there is no need for pump facilities or beams to secure water level difference, and third, use of grating cover The surface filtration of the sand layer is possible because sand can be used as a filter medium in the flowing water by introducing a multi-level horizontal gravel filter layer. High water purification effect, prevents burial of gravel layer by earth and sand, and smooth discharge of sludge has little possibility of closing gravel layer voids, resulting in long service life of purification facilities, and fourth, small amount of sludge generated for removal, and fifth, rainfall It is easy to maintain and can be selectively maintained only when necessary, such as there is no concern about burial, and the surface is automatically cleaned. Sixth, the effect is great in the dry season, especially when the water quality is deteriorated due to the low flow rate. .

Description

River water the quality of water purgation equipment by a riverbed filtering

In order to purify contaminated water in rivers, waterways, and reservoirs, this proposal installs a filtration facility consisting of a sand layer and a gravel layer with gratings on the bottom of the stream or waterway to purify the water quality by passing the contaminated water vertically through this filtration facility. Relates to a device.

At present, Korean rivers continue to be polluted due to the inflow of untreated point and nonpoint pollutants, especially in the low water season, when the flow rate decreases.

In order to solve this problem, it is required to expand the environmental base facilities for the treatment of point pollutants as well as to treat non-point pollutants corresponding to about 30% of the total pollutants.

However, the construction and operation of environmental foundations are enormous, and non-point pollutants are not processed from pollutants, and in case of rainfall, they flow into rivers through waterways, so they can directly treat untreated and unpointed pollutants and nonpoint pollutants in rivers and waterways. It is a good way to do it.

Currently, such a method includes a gravel contact oxidation method (reverse contact oxidation method) in which many microorganisms are grown on gravel surfaces to purify water quality using gravel.

The gravel contact oxidation method is a method of making concrete structures on the bottom or bottom of a river, filling it with gravel, and then purifying the contaminated river water by passing it horizontally through the gravel layer.

Currently, gravel contact oxidation methods include Korean Patent Registration No. 161767, 'Water Quality Purification Apparatus and Method Using Waste Concrete', and Korean Patent Registration No. 165636, 'Purification Purifier for River'.

First, the former requires a separate facility site because the purification facility must be installed on the bluff of the river.

The latter is installed to protrude above the bottom of the river floor or to be installed below the bottom. When protruding to the top, the water permeability decreases due to the encroachment of the river cross section. As the maintenance of the facility is difficult, both the former and the latter have a problem in that they must be installed on a separate site such as a blunt to exhibit proper function.

Second, there is a problem to install a pump facility or beam to secure the water level when installed in the blunt, etc.,

Third, the water purification effect is due to the precipitation of horizontal flow in the gravel layer and the decomposition of microorganisms, and there is a problem that the treatment efficiency is not high compared to the residence time.

Fourth, the soil and suspended matter flows into the gravel layer together with the sediment, suspended particles, etc. to prevent the voids of the gravel layer, in this case there is a problem that the water purification function is lost,

Fifth, due to the irregular size of the filled gravel (ø50 ~ ø150㎜), large gravel and small gravel can be filled in the upper part. At this time, the sludge desorbed from the large gravel does not move downward in the lower gravel layer with small voids. There is a problem that the sludge is accumulated inside the void closing phenomenon,

Sixth, in order to prevent the pore closure phenomenon, an emergency shut-off facility, an air injection facility, a sludge drawing facility, etc. are required to block the inflow of soil during rainfall. Therefore, the maintenance of such facilities is difficult and the maintenance cost is high. There was this.

In order to solve the above problems, the water purification facility is installed directly on the bottom of the river or waterway, so there is no need to secure a separate site. At the same time, the purpose of the present invention is to improve the efficiency of water purification, and to construct a water purification facility that is easy to maintain and maintain the facility, as well as eliminating pore closure.

In order to achieve the above object, the present invention, while forming the filter medium filling structure deeper than the bottom of the river or waterway, the bottom is inclined, and the lower end of the filter medium filling structure to form a manhole provided with a overflow pipe, while in the filter medium filling structure Provides a stream water purification system by river filtration formed by burying a grating cover so that sand is not stacked on top of the sand layer and sand layer is stacked on top of the sand layer. The purpose is thus achieved.

Figure 1 shows the whole of the filtration filling structure as a stream water purification facility according to the present proposal

Burnt out floor plan

FIG. 2 is a sectional view taken along the line A-A of FIG.

3 is a cross-sectional view of the portion B-B of FIG.

Figure 4 shows a state in which the grating cover is installed on the sand layer according to the present proposal

Floor plan

FIG. 5 is an enlarged view of a portion 'a' of FIG. 4;

6 is a perspective view taken from the 'I' portion of FIG.

7 is an elevational view showing the prefabricated blocking gate according to the present invention

8 shows a water purification system installed in a reservoir as another embodiment 1 of the present invention.

shave

Fig. 9 is a sectional view of the stormwater collecting well as another embodiment 2 of the present invention.

* Description of the symbols for the main parts of the drawings *

11: filter medium filling structure 12: filling structure bottom

13: catchhole 14: catch

14a: downstream wall 15: overflow pipe

16: manhole 17: inlet

18: Prefabricated Gate Sluice Base 19: Sluice Gate

21: sand layer 22: grating cover

23: unit grating 24: punched plate

25: gravel layer 25a: large particle size gravel layer

25b: small particle size gravel layer 26: filter layer

41: sedimentation zone 42: filtration zone

43: Emergency Yeosu 50: Stormwater Infiltration Sump

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

2 to 2, in the method, the river water purification facility includes a prefabricated blocking water gate 19 installed at the inlet of the river water channel, and has a filter medium filling structure 11 having an upper portion opened in a flow direction under the river bottom channel. Make a plurality of catching holes 13 at the bottom of the downstream wall, and make a catchment 14 thereafter, and install a plurality of overflow pipes 15 at a predetermined height, and at the bottom inside the filling structure 11. Fill the gravel 25a of the largest particle size horizontally and fill the gravel 25b of the small particle size in the upper part, but sequentially stack the gravel of the size so that it does not fall into the lower part (the gravel layer 25b of the small particle size toward the upper part) Filled by installing several layers horizontally) and the sand layer 21 is installed at the top, and then the grating cover 22 made of a shorter interval at right angles to the water flow direction is buried on the sand layer 21.

The filter medium filling structure 11 is made of concrete or the like and constituted in plural or one site, and the width and length are determined in consideration of the flow rate of the river, the width of the channel, the slope and the residence time of the water, and the depth is about 3 to 5 m. The filling structure bottom 12 is inclined from upstream to downstream so that the precipitated sludge is well discharged.

Or install a perforated pipe on the floor so that the sludge is discharged well.

The water introduced from the bottom of the sump is raised to the upper to be discharged through the overflow pipe 15 installed in a predetermined position on the sump 14, the size of the sump is a scale that can be accessed by people for maintenance Deepen the bottom to allow sludge to settle.

On the other hand, the filter medium is generally using gravel or crushed stone, natural stone, such as anthracite, zeolite, artificial gravel, carrier, plastic filter medium and the like can be used.

In this configuration, the present invention is constructed in such a way that when the multi-layered gravel layer 25a having a larger particle size is horizontally installed in the filter medium filling structure, the sludge desorbed from the small gravel of the upper part easily moves to the lower part because the pores become larger toward the lower part. The phenomenon is prevented.

The top sand layer should be 0.3 to 1m deep.

Sand is used as a filtration material because of its high strength, uniform particle size, permeability and economical efficiency, but it is not used for filtration in running water because it is washed down or mixed with foreign matter.

The sand has a specific gravity of about 2.65 and the sedimentation or drifting in the flowing water about 0.8m / sec.

However, the present invention solves the problem of land security and maintenance of the water quality purification facility by using sand in flowing water, which has many advantages, and at the same time solves the improvement of water quality and economical efficiency.

In order to use the sand as a filter medium in the flowing water buried grating cover 22 is made of a short interval at right angles to the water flow direction on the sand layer (21).

This prevents the horizontal flow into the grating when the flow rate increases in the stream and the flow rate increases, so that the sand in the grating is not lost and the impurities are not mixed.

The grating 22 covers the entire surface of the sand and is divided into small portions for maintenance, and a plurality of gratings are made with ropes or the like by using a perforated plunger plate 24 at the joint so that the small gratings 23 do not float in the flow. Unite integrally and bind to the wall.

The depth of the grating should be deep enough that the horizontal flow rate does not affect the grating when the flow rate increases and the horizontal flow rate increases.

In addition, if the grating is divided into two layers, it is possible to maintain the layer by layer when the substance is mixed.

By burying gratings, not only sand is lost in the stream, but the sand surface is kept flat and the dredging depth is constant.

In addition, the workability is improved without mixing of the sand by the footprint during dredging work.

The grating cover is made of steel, plastic, etc. and it is more effective to use the net and nonwoven fabric together.

The water purification system installed at the bottom of the channel always fills up to the overflow level of the catchment well, and the water purification function is activated or stopped by the discharge level of the upstream pipe and the difference of the river level (△ H).

That is, the water penetrates vertically or diagonally from the upper part of the filter layer, exits into the collecting hole downstream of the filter layer, flows into the collecting well, rises from the collecting well, and flows out into the overflow pipe.

In the dry season, water penetrates from the upstream of the filter layer. At this time, the suspended solids in the water are filtered from the sand surface, and the filtered foreign matters are dissolved in the gravel layer to dissolve dissolved organic substances and the water quality is purified.

As the penetration continues, the floating area accumulates from the front, so the penetration area moves downward.

However, if the flow rate increases by a certain amount of rainfall, some of them will flow directly without being penetrated, and if the water level at the upstream point equals the outlet level of the upstream pipe (ie ΔH = 0), then the infiltration into the filter bed will stop and the water will stop. It goes directly downstream.

As the flow rate increases and the flow rate increases, the suspended solids and sand on the grating are washed away, the surface is washed, and the penetration ability is restored.

As the flow rate gradually decreases and the water level becomes lower than the discharge level of the overflow pipe, the water penetrates into the filter layer again and the purification starts from this time.

If the river level is low but it is not discharged from the overflow pipe, dredge the grating top surface.

If the grating is blocked, remove the grating and dredge.

After dredging the soil, cover and bind the grating and fill it with fresh sand.

In addition, when a large amount of sand is deposited after the flood, the sand is removed, or when sand in the grating is lost, new sand is replenished.

In this way, the facility's action is determined by the flow and water level of the river, so there is no burden on the maintenance side. When the flow rate is low due to the low flow rate of the river, the water level is low. When this happens, the flow rate is abundant, and when the water level is high, the flow rate increases, and the impurities are recovered by washing away the contaminants deposited on the surface.

In rivers, this facility should be installed in areas where there is less sedimentary sediment during the flooding, straight sections, etc., and it is better to install this facility in existing beam installation areas, and the upper surface slope is appropriately given in many areas for sediment deposition.

In the front of the filter layer, it is advisable to make an inflow channel with sufficient length, and when the width of the channel is wide, it is better to install a plurality of narrow valleys at equal intervals at the bottom of the channel so that it can flow evenly when the quantity is reduced.

If there is a concern that the flow rate may increase rapidly during flooding and drift may occur, it is necessary to install gravel on top of the filter layer inlet.

When the size of the river is large and there is always flow, it is recommended to construct a plurality of filter filler structures for maintenance such as dredging of sedimentary soil and fresh water inside the grating. In this case, two prefabricated barrier gates (19) are provided in the upstream inlet. Install.

However, in rivers or waterways where the flow rate is low when the water is drained, there is only one filling structure, and a separate bypass channel is created next to the filling structure so that water flows into this water channel during maintenance.

This study is effective when applied to medium and small rivers with large fluctuations in flow rate, waterways and reservoirs where non-point pollutants flow, inflow pipes, combined sewer pipes, sewage pumping stations in which sewage flows, and infiltration basins to reduce rainwater. Is good.

As another embodiment according to the present invention will be described in detail by the accompanying drawings as follows.

Example 1

As shown in FIG. 8, the present invention is applied to the bottom of a reservoir, a pond, and the like for reducing pollutants of non-point pollutant-containing water.

In the case of an existing reservoir, a filtration facility is installed at the bottom of the inlet, and the newly created reservoir is made to have a long pond in the longitudinal direction to create a sedimentation zone 41 on the inlet side and a filtration zone 42 on the rest.

Alternatively, this facility may be installed in conjunction with wetlands.

The filtration facility at the bottom of the reservoir forms a sand layer 21 buried with the grating 22 cover on the upper part, and a horizontal gravel layer 25 is installed at the lower part by particle diameter.

In the center of the filtration area, a collecting basin 14 is collected at the bottom, which is open at the top and extends to the flood level of the reservoir, so that the water of the reservoir is directly directed to the collecting basin 14 without passing through the filter layer 26. Do not enter and is connected to the outside by installing the overflow pipe 15 on the top of the sump (14).

If the storage facility is large, it is economical to make the filter medium-filled structure 11 out of soil.

Water introduced into the reservoir is precipitated in the sedimentation zone (41), sedimentation, etc. in the filtration zone (42) vertically passed through the filter, and collected in the sump (14) and discharged to the outside through the overflow pipe (15).

These storage facilities are made of two or more sites for maintenance such as sedimentary dredging, and one by one, it is possible to maintain and maintain sedimental dredging, cleaning, and repair, and install an emergency waterway 43.

Example 2

As shown in Fig. 9, the present facility is also applicable to storm water discharge reduction facilities.

It is necessary to install stormwater infiltration facilities as stormwater discharge facilities to prevent flooding due to rainfall and to secure groundwater resources.

There are a variety of facilities currently used in the stormwater penetration facility, which is related to the present invention, and includes: a penetration barrel method in which gravel and sand are disposed on the bottom of rain gutters of buildings and roads; Crushed air gap penetration method that induces rainwater penetration by laying gravel and sand in the space between houses, and installing manholes on road side or storm pipe have.

However, these methods have the advantage of securing a large amount of infiltration in a short time by using gravel with large porosity in the surface layer, but it is used because the soil, suspended matter and contaminants contained in rainfall runoff close the gravel pores. There was a disadvantage of shortening sleep.

Therefore, by laying a layer of sand with gratings on the upper part of the facility and introducing a horizontal layer of gravel in multiple stages at the bottom, it prevents groundwater contamination by strengthening the water purification function along with life extension by preventing gap closure.

In addition, this facility can be installed at the bottom of the reservoir of rainwater pumping station installed to prevent flooding during rainfall.

Most of the reservoirs at these rainwater pumping stations are in the lowlands where the combined sewer pipes are installed.

Therefore, since the sewage flows into the reservoir as usual, a purification facility may be installed in the same way as the river water purification facility at the bottom of the Cheongcheon waterway of the reservoir.

As described above, the present invention is not limited to the preferred embodiment of the above-described characteristics, and any person having ordinary knowledge in the field to which the present invention pertains may make various changes without departing from the gist of the present invention claimed in the claims. .

In this paper, first, there is no need for a separate site for installing water purification facilities in rivers or reservoirs, and second, there is no need for pump facilities or beams to secure water level differences. Third, the use of grating covers and multi-level horizontal gravel filter layers The sand can be used as a filter medium in the flowing water, so the surface filtration of the sand layer has a high water purification effect, prevents the gravel layer from buried by the soil, and the possibility of closing the gravel layer voids due to the smooth discharge of sludge. Fourth, the sludge amount to be removed is small, fifth, there is no fear of investment during rainfall, and the surface is automatically washed, and the maintenance is easy and can be selectively maintained only when necessary. There is little effect that the effect is greater in the dry season when the water quality is worse.

Claims (3)

A concrete filter medium filling structure 11 having an upper portion opened in a flow direction under a river bottom channel is created, but a prefabricated blocking water gate mount 18 is formed in an inflow passage at an upstream inlet so that the water gate 19 can be opened and closed and the downstream wall ( 14a) a plurality of catching holes 13 are formed at the bottom thereof, and a collecting well 14 having a plurality of overflow pipes 15 installed at a predetermined height behind the downstream wall can be made accessible to a person for maintenance. On the other hand, the filter medium filling structure 11 is filled with the gravel layer 25a of the largest particle size horizontally at the bottom and filled with the gravel layer 25b having a smaller particle size as the upper portion thereof rises upward. Gravel having a small particle diameter forms a gravel layer 25 using gravel having a size that does not fall between the pores of the gravel layer stacked below, and has a depth of 0.3-1 m at the top. After forming the bottom layer 21, the river water quality purification device by river filtration characterized in that the buried grating cover 22 is made to be buried in the sand layer 21 to be located at right angles to the direction of water flow. According to claim 1, wherein the filter medium filling structure 11 is divided into one or a plurality of sites according to the size of the constant flow of the water channel, the width and length of the flow considering the flow rate of the river, the width of the channel, the slope and the residence time of the water, etc. Depth of about 3 ~ 5m is good and the bottom of the filling structure 12 is a stream water purification device by river filtration characterized in that the slanted from upstream to downstream to discharge the sludge is well discharged. The method of claim 1, wherein the filter material laminated in the filter medium filling structure 11 is a river water purification device by river filtration, characterized in that the natural stone or artificial gravel, carrier, plastic filter material, such as gravel, crushed stone, anthracite coal, zeolite, etc. are used.