KR100499612B1 - Solid Separation and Filtered water obtainment method by Screen Channel - Google Patents

Abstract

 The present invention relates to a method and a device for separating solids and securing filtered water using a screen channel in flowing contaminated water, and in particular, by installing a channel formed with a screen in a contaminated stream, rainwater, sewage, etc. The present invention relates to a method for securing filtrate by continuously separating the contained contaminants and solids without power. The configuration is to make a U-shaped screen channel 2 using a screen having a large number of voids, and the screen channel 2 ) Is installed on the upper surface of the filtered water collecting structure (3) in which the manhole (8), the filtered water overflow hole (10), and the discharge pipe (9) are formed. By easily and economically securing influent from which solids or solids have been removed, the construction cost of the purification facility is reduced, the purification efficiency is increased, and the maintenance Second, the filtrate collection structure, which is installed in the river and receives the filtrate from the screen channel, becomes a useful habitat for fish. Third, it captures contaminants and solids in the treatment facility in the overflow water treatment facility of the confluence sewer pipe or storm pipe. By not storing, it is easy to maintain the maintenance of the overflow water treatment facility and reduce the maintenance cost. Fourth, as the overflow water treatment facility, it can be applied regardless of the flow rate. The facility is simple, so there is less need for site, which saves construction cost.

Description

Solid Separation and Filtered Water Obtainment Method by Screen Channel

The present invention relates to a method and a device for separating solids and securing filtered water using a screen channel in flowing contaminated water, and in particular, by installing a channel formed with a screen in a contaminated stream, rainwater, sewage, etc. The present invention relates to a method for securing filtrate by separating sediments and solids contained in a non-powerless manner continuously.

In general, the contaminated water flows into a channel having a free water surface, or a water flowing through a pipe, and includes contaminated river water, rainwater containing nonpoint pollutants, and overflow water of a conjoined sewer containing sewage.

These waters contain various soils, solids and dissolved substances such as soil, sewage, garbage and leaves from the watershed.

These pollutants flow with water and settle and reflow at the bottom, and chemically and biologically change to precipitate, decay, and multiply in water to form various sediments, debris, suspended matter, microbial masses, algae, and so forth. Will leak.

In particular, the overflow water generated during rainfall in the combined sewage system contains a large amount of pollutants, but the discharged water is contaminated because it cannot flow into the sewage treatment plant.

Such contaminated flowing water contains not only dissolved pollutants but also large and small various contaminants and particulate solids, which are the main pollutants in public waters.

All of these pollutants are nonpoint pollutants. In Korea, these nonpoint pollutants currently account for 30-40% of the total pollutant generation. However, there is no effective and economic way to solve these problems. to be.

However, the problems of the polluted river purification facilities that are partially used as the non-point pollutant purification method are as follows.

The biggest problem for pollutant treatment plants is the continued influx of suspended solids.

Suspended matter that enters the purification facilities accumulates in the purification facilities over time to impair the normal operation of the facility, such as to reduce the efficiency of purification, difficulty in maintenance, and aesthetic problems, and to stop the functioning of the purification facilities in severe cases. do.

Accordingly, some purification facilities have facilities such as collecting culverts and collecting pipes in the intake facilities to prevent the inflow of suspended substances into the purification facilities, but in such facilities, the suspended solids are directly filtered through the filtration layer of the intake facilities. Since the substances remain in the filtration layer, when water containing a lot of suspended substances enters, the pores are blocked quickly, so that it is difficult to secure proper water intake.

Therefore, the water collection facilities must be cleaned every time the air gaps are blocked, so the frequency of cleaning increases. Moreover, when the air gaps inside the filtration layer are blocked, the water flow is not secured by surface cleaning.

Because of these difficulties, some facilities have only water screens with large nets installed in the water intake, but this action causes problems such as mentioned above because the floating materials flow into the purification facilities without control.

As an example, in the case of gravel contact oxidation facilities installed at the bottom of rivers, a wooden screen with a distance of 25 to 50 mm is installed at the inlet port. Therefore, less than 25 mm of suspended solids flow into the gravel layer pores of the purification facility to prevent the gravel layer pores. . Problems such as increased sludge emissions or the consumption of suspended solids by oxygen make it difficult to operate the purification plant normally.

In order to prevent this, a detail screen should be installed instead of a wooden screen, but the screen is quickly closed, which reduces the amount of inflow.

In order to solve such problems, in order to effectively remove the suspended substances in the influent, it is necessary to install the facilities such as sedimentation basin, pressurized flotation site, and automatic screen as separate treatment facilities to remove the suspended substances.

However, these methods are difficult to apply due to problems such as securing the place, installation of facilities, installation of facilities to secure the water level, and maintenance.

On the other hand, sewage in areas where sewage is distributed, such as urban areas and development areas, and non-point pollutants generated during rainfall are transported to sewers.

In sewerage, there are both sewer and conjoined sewers, and there are sewage pipes and storm pipes.

Since the sewage pipe is connected to the sewage treatment plant, the sewage flowing into the sewage pipe is transported to the treatment plant and discharged after being discharged, so there is no problem of water pollution.

There is no problem of water pollution because sewage and rainfall flow together in the combined sewage pipe, and the sewage is separated from rainwater silos, connected to the collection pipe, flowed into the sewage treatment plant, and discharged, and there is no problem of water pollution. It is discharged to nearby waters and polluted public waters.

As such, the pollutants that are not transported to sewage treatment plants from sewer supply areas and discharged directly to public waters are non-pollutant-containing water from rainwater pipes and overflow water from confluent sewer pipes.

At present, the developed countries including Korea, and Korea have raised the issue of water pollution in public waters.

As a solution, developed countries have installed manhole-type treatment facilities in sewage pipes to remove contaminants or solids from polluted water and discharge them to public waters. .

A representative technique of these methods is as follows.

The manhole is made into a cylinder and the inflow water becomes a vortex inside the manhole, so that solid matter such as sand or sand can be settled. Another method is to install a separate cylindrical screen network smaller than the cylinder size inside the manhole. As the inflow water flows into the screen barrel, the water rotates in the screen barrel, creating centrifugal force. The water falls behind the screen and is discharged to the outside. The debris trapped on the screen net is washed off with water and separated from the net. There is a method of precipitation to the bottom of.

However, these methods have the following problems, such as the removal of contaminants, solids, soils, etc. are all trapped inside the manhole, such as the collection of these sediments.

First, it is a method of capturing various contaminants, solids, and earth and sand contained in sewage or rainwater in the manhole, requiring maintenance for the removal of these captures, and high maintenance costs. Second, larger than the diameter of the sewage pipe. Since manholes need to be installed, the site needs to be large and construction costs are high. Third, large-scale sewage pipes can be applied to small sewage pipes. It is difficult to apply to large flow rate.

The present invention for solving the above problems, by installing a waterway formed as a screen in the stream or water channel or confluence sewer pipe flowing contaminated water to segregate the contaminants or solids continuously without power to secure the filtered water and downstream the separated contaminants, etc. It is possible to easily and economically secure influents from which contaminants have been removed from polluted river water and non-point pollutant-containing water purification facilities continuously and economically.In addition, by not capturing and storing contaminants in the treatment facility at the overflow water treatment facility of the combined sewage pipe. Its purpose is to facilitate the maintenance and maintenance of overwater water treatment facilities and to reduce construction and maintenance costs.

In order to achieve the above object, the present invention, by using a screen with a large number of air gaps to form a water channel formed in the screen flows, sewage pipes and the like structure and can collect the water filtered under these water or sewage pipes so that the water level difference Among the contaminated water and contaminants introduced into the waterway formed into the screen, the water falls out of the screen through the air gaps and gathers into the catchment structure, and the contaminants caught by the sieve proceed by the fluid force, inertia and gravity of the water flowing through the screen waterway. It can be easily and economically secured inflow water from which contaminants have been removed by being pushed forward through the screen channel and flowed downstream. Also, it is easy to maintain and reduce facility and maintenance costs in the overflow water treatment of combined sewer pipes. This is achieved.

Looking at the configuration according to the invention by the accompanying drawings as follows.

As shown in FIGS. 1 and 2, a screen channel 2 formed of a screen 1 is provided in order to economically and continuously secure filtrate water and to facilitate maintenance by separating a contaminant or a solid substance by non-power from contaminated water. After the installation is installed on the filtered water collecting structure (3) and contaminated water flows to the screen channel (2) to ensure the filtered water.

The screen 1 in the screen channel 2 is composed of a bar-shaped screen (4) made of a bar (Bar), and a plate-shaped screen (5) made in a plate shape using a grid, perforated network, iron plate network, etc. to be.

The bar-shaped screen 4 is formed by wedge-shaped cross-sections of the wedges, and a plurality of bars are arranged in the same direction or at an oblique step and spaced about 0.1 to 10 mm depending on the flow rate to be secured and the characteristics of the contaminants. After making the rear part with the narrow side by welding at proper intervals, it is made by welding, etc., so that the air gap in the front part is small and the air gap in the back part is made big so that the gap is not blocked well and the filtration is easily carried out to the rear part to continue the filtration. to be.

In addition, the plate-shaped screen (5) is configured in the form of voids, round, oval, rhombus, rod-shaped, etc., but the impurities caught between the pores of the screen (1) and at the same time caught between the voids are flowing water The front end is small and the rear part is enlarged to make the wedge air gap (6) or the deflection air gap obliquely on the iron plate to make the air gap obliquely on the steel plate so that the end surface of the air gap becomes wedge-shaped so as to be easily removed. This allows the solids to be washed by running water without getting stuck in the voids.

The screen channel 2 includes a channel formed with three screens, a channel formed with two screens, and a channel formed with one screen.

The channel formed by three sides of the screen is the screen 1 itself and the channel formed by the two sides of the screen is one of the three sides of the channel made of concrete, etc. It is a screen channel that creates a space and attaches a screen to the overflow space.

The cross-section of the channel formed by the three-sided screen can be made into semicircle, triangle, ladder, etc., and can be made by combining the bar screen 4 and the perforated plate screen 5 according to the characteristics of the incoming solids. .

For example, where there is a lot of earth and sand, the bottom may be a perforated plate-shaped screen (5), both side walls may be a bar-shaped screen (4), and the size of the pores may be small, and the side walls may be made large.

The amount of filtration of the channel formed by the screen depends on the size of the screen, but also depends on the porosity, pore type, and the presence of residual solids in the channel.

The amount of residual solids in the screen channel 2 depends on the channel length, pore type, screen inclination, screen roughness, flow rate, flow rate and inflow solids characteristics. Gradually decreases and the water level in the screen channel rises, from which filtration occurs in the side air gaps.

In addition, the raised water level pushes the residual solids downstream so that the residual solids are removed from the bottom, and filtration through the bottom occurs.

Therefore, if the screen channel 2 is inclined or there is a flow, the solids are not deposited well in the channel and the filtration is continued. Therefore, the more the solids in the influent and the smaller the flow rate, the higher the inclination of the screen channel and the higher the side height.

On the other hand, the screen formed on the sewage pipe with one surface formed as a screen is installed in the upper part of the pipe, so there is usually no flow rate to the screen because the flow rate is small, but the flow rate is increased due to rainfall and overflowed water occurs when the contaminants flow.

However, at this point, the flow rate in the sewage pipe is increased so that the water is discharged to the water collecting structure 3 through the screen 1, but the contaminants, etc., are washed in the water and flow downstream, so that the screen is not blocked and the filtration continuously occurs.

In this way, the waterway formed by the screen is well drained of water, the pores are not blocked, and even if blocked, it is easy to remove the blocked solids, and there is no problem due to the collection of trapped wastes because the separated impurities or solids are washed down and discharged downstream. .

Therefore, the present invention is economically and continuously separated from the contaminated water flowing contaminants or solids in this way to secure the filtered water and can also be applied to large sewage pipe is a method that requires less site.

The installation method of the channel formed by the screen to secure the inflow water from which the contaminants are removed from the contaminated river water and the non-point pollutant-containing water purification facility is as follows.

As shown in Fig. 2, the channel 2 formed of three screens in a stream, a water channel, or a sewer pipe is installed in a straight line in accordance with the direction of the fluid, but is installed at an inclined range as much as possible and the screen channel is large when the width of the river or channel is large. 2) Install a water screening facility so that the water flows toward 2) and install a number of screen channels.

The filtered water collecting structure (3) is installed below the water channel (2) formed of three screens.

The filtered water collecting structure (3) is made of concrete, iron plate, plastic, etc., and can be made into a rectangular cylinder or cylindrical shape.

The catchment structure 3 may cover or open the upper part according to a use or an installation area, and make a manhole 8, a filter water intake port 9, a filter water overflow hole 10, and the like. It can be used as a purification facility by filling filter media such as gravel.

In addition, the filtered water collection structure installed in the river is a useful facility for fish inhabiting the river, which is used as a shelter during flooding, as a survival facility during drought, and as a fishery that can spawn, feed, rest, and escape in normal times. do.

To this end, secure the depth of the catchment structure about 2 ~ 3m and install the filtered water overflow hole near the bottom of the river to facilitate the access of fish and fill the appropriate amount of gravel inside the catchment structure.

As described above, the present invention makes a waterway with a screen having many voids, and installs it in a water flow channel, a pipeline, etc., so that contaminated water passes through the screen channel, water falls into the air gaps, and contaminants are caught on the screen. By passing through the screen channel through the screen direction by pushing the traveling direction by the gravity and the gravity, the contaminants and the solids are continuously separated and easily secured by the filtered water.

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

<Example 1>

As shown in Figures 12 to 14, a method of making a channel having one surface formed by a screen such as a sewer pipe, a collecting pipe, a rain pipe, and the like is as follows.

The present invention is easy to apply to the BOX-type pipe and can be applied regardless of the size of the pipe.

The overflow water overflow space (14) is formed in the shape of a quadrilateral with the required size on the upper side of the conduit in the form of a box, and the whole space is closed with a screen (1).

Install the filtrate collection structure (3) by attaching it tightly to the pipeline out of the pipeline with the overflow part.

The water collecting structure 3 is installed with the filtered water discharge pipe 11 lower than the height of the upstream weir (12) and the manhole (8) is installed.

In the region where the pipeline is installed in the blunt and the water level of the filtered water discharge stream rises and the river water flows back to the filtered water discharge pipe 11, a check valve 13 is installed at the end of the filtered water discharge pipe 11.

As described above, the present invention is not limited to the preferred embodiments of the above-described characteristics, and various changes can be made by those skilled in the art without departing from the gist of the present invention claimed in the claims. .

As can be seen from the above, the present invention firstly secures inflow water from which contaminants or solids have been removed in a purification facility of contaminated river water and non-point pollutant-containing water easily and economically, thereby reducing the construction cost of the purification facility and increasing the purification efficiency and maintenance. Second, the filtered water collection structure, which is installed in the river and receives the filtered water from the screen channel, becomes a useful habitat for fish. Third, the contaminants or solids in the treatment facility in the overflow water treatment facility of the combined sewer pipe or storm pipe By not capturing and storing, it is easy to maintain the maintenance of the overflow water treatment facility and reduce the maintenance cost. Fourth, as the overflow water treatment facility, it can be applied regardless of the flow rate. Simple construction saves construction costs There are effective.

1 is a perspective view showing the overall configuration according to the present invention

2 is in accordance with the present invention Perspective view installed in a river

3 is a perspective view of a bar screen according to the present invention;

4 is a plan view of a bar screen according to the present invention;

FIG. 5 is a sectional view of the portion “A-A” in FIG. 3

Figure 6 is a plan view of a wedge void plate screen according to the present invention

FIG. 7 is a sectional view taken along the line “B-B” of FIG. 6

8 is a plan view of a deflection air gap plate screen according to the present invention.

9 is a cross-sectional view of the portion “C-C” of FIG. 8;

10 is a three-sided screen formed of a bar screen according to the present invention can be formed into a screen

       Perspective view of furnace

Figure 11 is a water channel formed of three screens made of a plate-shaped screen according to the present invention

       Perspective view of

Figure 12 is a plan view of the screen channel on one side in accordance with the present invention installed in the sewer pipe

FIG. 13 is a sectional view of a portion "D-D" in FIG.

Fig. 14 is a sectional view of the portion “E-E” in Fig. 13;

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

1: screen 2: 2a: screen channel

3: filtered water collection structure 4: bar screen

5: plate screen 6: wedge gap

7: deflection air gap 8: manhole

9: intake pipe 10: filtered water overflow hole

11: Outfall 12: Overflow Wear

13: Backflow prevention lid 14: Filtrate overflow space

Claims (8)

A U-shaped screen channel 2 is fabricated using a screen 1 having many voids, and the screen channel 2 is formed with a manhole 8, a filtered water overflow hole 10, and a discharge pipe 9 formed therein. (3) Separation of solids and filtering water using the screen channel, characterized in that installed on the upper surface The screen 1 of claim 1, wherein the screen 1 of the screen channel 2 is a bar-shaped screen 4 made of a bar, and a plate-shaped screen made of a plate using a grid, a perforated network, an iron grid, or the like. (5) solids separation and filtering water securing device using a screen channel consisting of According to claim 2, The bar-shaped screen (4) has a wedge-shaped cross-section of the bar (Wedge) to make a large number of bars in the same direction or at an oblique step, the interval is 0.1 depending on the characteristics of the flow rate and the object to be secured Solid separation and filtration water securing device using a screen channel, characterized in that it is produced by combining with a fixed space in the rear part with a narrow surface after arranging by ~ 10mm spaced According to claim 2, The plate-shaped screen (5) is formed in the shape of the voids circular, oval, rhombus, rod-shaped, etc., the front end is small and the rear end is enlarged so that the void cross section is wedge-shaped, the wedge pores (6) Or by forming a deflection air gap (7) obliquely on the iron plate in the direction of the flow of water, so that the solids are washed out by water flow without being stuck in the air gaps. Filtration water securing device According to claim 1, wherein the screen channel 2 is composed of a channel formed on the three sides of the screen, a channel formed on the two sides of the screen and a channel formed on one side of the screen, respectively, wherein the three channels formed of the screen (1) The waterway itself becomes a channel and two sides are screens, one of which is a channel made of concrete, etc., and one surface is formed of screens, and the overflow channel (14) is formed on the upper side of the sewer pipe. (14) solids separation and filtering water securing device using a screen channel characterized in that the screen is attached 6. The cross-sectional shape of the water channel formed by the three-sided screen can be made into a semicircular, triangular, ladder, etc., and the bar-shaped screen (4) and the perforated plate-shaped screen (5) according to the characteristics of the incoming solids. Separation and solids securing device using a screen channel, characterized in that the production by combining The method of claim 1, wherein the water collecting structure (3) is filled with a filter material, such as sand, gravel inside the water collecting structure solids separation and filter water securing apparatus using a screen channel, characterized in that can be used as a purification facility. The U-shaped screen channel 2 is manufactured by using the screen 1 having many voids, and the screen channel 2 is formed by filtering the manhole 8, the filtered water overflow hole 10, and the discharge pipe 9. It is installed on the upper surface of the filtered water collecting structure (3) capable of collecting water, and then installed on the stream, water channel, sewer pipe, etc., through which the polluted water flows. As the contaminated water passes through the screen channel (1), the water falls into voids and The solids are caught on the screen (1) and the contaminants caught on the screen are pushed forward by the fluid force, inertia, and gravity of the flowing water, and then flow downstream through the screen channel (2) to collect the filtrate from which the impurities or solids have been removed. Method for segregation of solids and securing filtered water using a screen channel characterized in that the structure (3) can be easily secured