KR101736743B1 - Automatic backwashing system for non-point pollution abatement facilities with automatic backwash and stagnation water treatment - Google Patents

Abstract

Provided is an automatic backwashing apparatus for a non-point pollution abatement facility with automatic backwashing and stagnation water treatment functions, comprising: a pre-treatment chamber which treats for complete purification, which specifically has a wastewater chamber on the bottom to maximize backwashing efficiency by automatic backwashing and stagnation water treatment after purification, which circulates initial rainwater let in by a floc-forming barrel, which forms a great particle of floc by collision between foreign substances included in the initial rainwater, and which performs overflow and precipitates pollutants; a filtering chamber into which the water, from which pollutants are removed from the pre-treatment chamber, is let, and in which pollutants are filtered out by a filtering unit which comprises floating media in between filtering nets formed on the top and bottom; a cleaning/filtering water chamber in which the water purified by the filtering chamber overflows and from which the water is discharged through an outlet; and a backwashing processing unit which, when the purification process in the filtering chamber or rain is ended or when floating media is intended to be cleaned, automatically cleans the floating media by a set value and treats the stagnated water. Accordingly, the present invention can more efficiently purify a non-point pollution abatement facility when a user intends to reuse the facility.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic backwashing system for nonpoint pollution abatement facilities having automatic backwashing and stagnation water treatment functions,

The present invention relates to a non-point pollution abatement facility, and more particularly, to a non-point pollution abatement facility, and more particularly, to an automatic non-point pollution abatement facility that can treat non-point pollutants more cleanly, And an automatic backwashing apparatus of a non-point pollution abatement facility having a washing and stagnating water treatment function.

In general, pollutants include point pollutants emitted from clear and limited point pollution sources such as domestic sewage, industrial wastewater and livestock wastewater, and pollutants such as agricultural land, pasture, forest, construction site, mine, Empty areas such as landfills, urban areas, roads, and industrial sites can be divided into nonpoint pollutants emitted from a wide range of nonpoint pollution sources.

The pollutants emitted from the pollutants are distributed in various forms such as heavy metals, pathogenic microorganisms, organic compounds, radioactive substances, toxic substances and other salts. Therefore, rainwater is washed away in rain and rainwater, Which causes water pollution, destroys the ecosystem and ultimately causes harm to humans.

On the other hand, in Korea, the first flash phenomenon in which a large amount of contaminants are spilled out at the early stage of rainfall is remarkable due to the increase of the impervious surface area. Especially, the non-point pollutants generated in urban areas are not only solid matters, It contains toxic substances such as heavy metals and polyaromatic hydrocarbons (PAHs), which is one of the main causes of contamination of the water system.

In particular, in the case of highways among existing public roads, roads passing through the water source protection area, water intake facility area, special countermeasure area and river side water around rivers have nonpoint pollution It is necessary to establish a reduction facility.

In addition, the non-point pollution abatement facility also provides backwashing means for continued use.

Prior art related to the non-point pollution abatement facility including the backwash function as described above includes a filtration unit for filtering contaminants, as disclosed in Korean Patent Registration No. 10-1494296 (hereinafter referred to as "Prior Art Document 1") And a backwashing unit for backwashing the foreign substances accumulated in the filtration unit together with water to automatically wash the foreign matter accumulated in the filtration unit, so that it is unnecessary to replace or clean the separate filtration unit, and the filtration unit is automatically cleaned without any power, Technologies have been proposed such as a non-powered, automatic backwash-type early non-point pollution abatement facility that allows convenient management and continuous use of pollution abatement facilities.

Also, as disclosed in Korean Patent Laid-Open Publication No. 10-2016-0084027 (hereinafter referred to as "Prior Art Document 2"), after a certain period of time has elapsed from the end of rainfall, a backwash pump located at the top of the septic tank is automatically operated Such as a non-point pollution abatement facility capable of backwashing by which rainwater is moved to a filtration device and a drainage tank of the septic tank to backwash the filtration device and backwash effect by injecting air at the lower end during backwashing, Techniques have also been proposed.

Also, as disclosed in Korean Patent Laid-Open Publication No. 10-2016-0082673 (hereinafter referred to as "Prior Art Document 3"), high pressure air is supplied to backwash the contaminants adsorbed on the outer surface of the porous filter A technique such as a non-point pollution abatement facility equipped with a backwash function capable of maximizing the backwash function by separating the pollutants attached to the porous filter that is filtered by the microscopic vibration of the rising bubbles, Has also been proposed.

Also, as disclosed in Korean Patent No. 10-1653780 (hereinafter referred to as "Prior Art Document 4"), a pretreatment unit composed of a plurality of storage tanks and filter members, a filtration treatment unit, a filter material cover, a backwash drainage storage tank, A drainage pump, a backwash treatment unit, and a discharge unit to effectively remove pollutants of nonpoint pollutants contained in road runoff and separate the pollutants from the roadway and discharge the purified pollutants directly to a sewage treatment plant or designated wastewater treatment facility, And a non-point pollution abatement facility equipped with a backwash automation system capable of preventing mixing with a non-point pollution abatement facility.

Korean Patent Registration No. 10-1494296 Korean Patent Publication No. 10-2016-0084027 Korean Patent Publication No. 10-2016-0082673 Korean Patent No. 10-1653780

However, the prior art documents 1 to 4 have a disadvantage in that the cleaning efficiency of the non-point pollutant is considerably low, and in particular, the backwashing means are considerably complicated and the backwashing is not so efficiently performed.

The main object of the present invention to solve the above-mentioned problems of the prior art is to provide a method of treating non-point pollutants more cleanly, and more particularly, So as to maximize the efficiency of the automatic backwashing and stagnation water treatment.

Another object of the present invention is to make backwashing more clean by one and two, and also to rinse and clean up the floating filter media after backwashing.

According to an aspect of the present invention, there is provided a sewage sludge tank for a sewage sludge sewage treatment system, comprising: A pretreatment tank in which flocs are formed and the pollutants are settled while overflowing; A filtration tank in which contaminants are filtered by a filtration unit including a floating filter medium between filtration nets formed at upper and lower portions after inflow of contaminant-removed water via the pretreatment tank; And a washing filtration water tank through which the purified water flows through the filtration tank and then flows out through the outlet port. When the filtration tank is to be cleaned or when the rain is finished or the floating filter media is to be washed, the floating filter media And a backwash processing unit for processing the stagnant water after the washing.

The flocking barrel is in the form of a double tube. The flocking barrel has a first barrel in which the inlet pipe is inclined so as to be pivoted from the upper side to the lower side while the initial void is introduced into one side of the upper face, And a second barrel having a through-hole formed to protrude upward from the upper surface of the first barrel after being pivoted to a rear upper side.

And a flot form of a large particle is formed as a collision between foreign substances included in the initial flotation by turning the initial flotage introduced by the floc forming barrel, Pre-treatment tank; A filtration tank in which contaminants are filtered by a filtration unit including a floating filter medium between filtration nets formed at upper and lower portions after inflow of contaminant-removed water via the pretreatment tank; And a washing filtration water tank through which the purified water flows through the filtration tank and then flows out through the outlet port. When the filtration tank is to be cleaned or when the rain is finished or the floating filter media is to be washed, the floating filter media The backwashing treatment unit of the nonpoint pollution abatement facility may further include a backwash treatment unit connected to the overflow water line connected to the desorption tank at one side of the upper part of the filtration tank, A first washing unit arranged to spray backwash water, which is an upper water passed through the filtration unit, in order to remove foreign matter clogged between the foreign matter adhered to the surface of the floating filter medium on the floating filter medium and the floating filter medium, And an air supply unit for supplying air to the lower portion of the first cleaning unit to clean the floating filter medium and to discharge the foreign matter to the upper side The.

And a second cleaning unit for performing secondary backwashing by supplying filtration water in the cleaning filtration water tank and air in the air supply unit to the lower portion of the air supply unit.

The second cleaning unit may further include only filtering water after the second backwash to rinse the floating filter media and to arrange and arrange the floating filter media.

The present invention not only treats non-point pollutants more cleanly, but also maximizes backwashing efficiency due to automatic backwashing and stagnation water treatment, especially after purification, so that when the nonpointing pollution abatement facility is used again, It has an effect of purifying.

In addition, the backwashing can be performed more cleanly by the first surface cleaning and the second backwashing, and the rinsing process and the cleaning process of the floating filter media can be performed after backwashing. Thus, It is possible to maximize the purification efficiency due to the stable and high cleaning efficiency as well as to have immediate reuse ability without any additional maintenance.

1 is a partially cutaway perspective view for explaining the present invention,
Fig. 2 is a cross-sectional view according to Fig. 1,
3 is a perspective view for explaining a flap-forming barrel of the present invention,
FIGS. 4 to 8 are flowcharts for explaining purification, backwash, and water removal processes according to the present invention;
FIG. 9 is a block diagram for explaining the backwashing process of FIGS. 4 to 8. FIG.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. The present invention is not limited to the embodiments.

Fig. 1 is a partially cutaway perspective view for explaining the present invention, Fig. 2 is a sectional view according to Fig. 1, Fig. 3 is a perspective view for explaining a flap-forming barrel of the present invention, and Figs. FIG. 9 is a block diagram for explaining the backwashing process of FIGS. 4 to 8. FIG.

As shown in the figure, the non-point pollution abatement facility (1) is designed to clean the pollutants generated from the non-point pollution sources. In the case of the highways among the existing public roads, the water source protection area, It is a facility provided on the road passing through the area.

The present invention is intended to maximize the efficiency of backwashing due to automatic backwash and stagnant water treatment after purification, as well as to further purify nonpoint pollutants.

The non-point pollution abatement facility 1 according to the present invention comprises a water withdrawal tank 12 provided with a pump P for discharging water at the lower part thereof, A pretreatment tank 10 which swirls in the form of a whirlpool to form a floc form of large particles due to collision between foreign substances contained in the initial rainwater and then flocculates and precipitates contaminants; A filtration unit 25 for filtering the contaminants by the filtration unit 25 including the floating filter medium 22 between the filtration nets 21 formed at the upper and lower portions after the water from which contaminants have been removed through the pre- (20); And a cleaning filtration water tank 30 through which the purified water flows through the filtration tank 20 and then flows out through the outlet 32. The filtration tank 20 is subjected to a purification process, And a backwashing processing unit (40) for automatically washing the floatation filter medium (22) according to the set value and processing the stagnant water when cleaning the flushing filter medium (22).

The pretreatment tank 10 and the filtration tank 20 are connected to each other by a first partition wall 10A having a bottom surface and water into which the foreign substances are deposited is introduced into the filtration tank 20. The filtration tank 20 and the cleaning filtration water tank 30 Is partitioned by the second bank 20A and is formed to flow over the upper end of the second bank 20A. Between the water retention tank 12 and the filtration tank 20, there is provided a valve V for discharging stagnant water.

The flocking barrel 14 is a typical double tube type and has a first barrel 14A in which the inflow pipe 14a is inclined so as to be pivoted from the upper side to the lower side while the initial storm is introduced into one side of the upper surface, 14A of the first barrel 14A and the second barrel 14B formed with a through-hole 14b so as to protrude from the upper surface of the first barrel 14A after being pivoted to the upper side after flowing into the lower portion of the first barrel 14A . The inlet pipe is formed obliquely so as to be able to swirl in the form of a whirl when the incoming initial good flows into the first barrel. In addition, the second barrel has a narrow diameter at the bottom side and a wide diameter at the portion where the top side through-hole is formed. At this time, the upper space side flowing through the inflow pipe in the first barrel has a narrow diameter and the lower side has a wide diameter.

In other words, while the initial storm is rotated from the first barrel to the first turn, that is, from the upper side of the narrow diameter to the lower side of the wide diameter, the foreign substances are brought into contact with the widest contact area due to the collision, And the maximum contact area between the foreign substances due to the collision is also maximized while the contact time is also brought into contact with the maximum contact length through the first order and the second order, So that the contact or collision between the foreign matter is continuous and long-time contact. This results in a condition in which fine particles contained in the initial rainfall can be smoothly formed into a flock having a predetermined volume. Thereby resulting in a series of pretreatment processes for further increasing the purification efficiency in the filtration section of the filtration tank.

The filtration tank 20 removes contaminants from the floating filter medium 22 provided between the respective filtering nets 21 provided at the upper and lower portions of the filtration tank 20. The filtered water, And is discharged through the outflow pipe (32) through the washing filtration water tank (30) while overflowing the upper end.

The process of removing the pollutants contained in the initial rainwater and purifying the rainwater will be supported by the above description as shown in FIG.

On the other hand, when the purification process, the expiration of time or the washing of the floating filter media is desired, a backwashing process (S) can be performed by backwashing treatment section provided in the filtration tank, .

The backwashing processing unit 40 includes a backwashing trough 42 connected to the overflow water path 41 connected to the upper part of the filtration tank 20 and including a water withdrawal tank 12 and an on-off valve V1, A first washing step of spraying filtration water, which is an upper water passed through the filtration part, to remove foreign matter clogged between the foreign matter adhering to the surface of the floating filter medium 22 and the floating filter medium 22 on the floating filter medium 22; And an air supply unit 45 for supplying air to the lower portion of the first cleaning unit 44 so as to be able to remove the foreign material to the upper side together with the cleaning of the floating filter medium 22. That is, surface cleaning of floating filter media is performed.

The first cleaning unit 44 is a conventional type in which a plurality of pipes are arranged alternately or in parallel with each other and a plurality of spray nozzles are provided on the bottom surface to supply water by a pump installed at the water level position.

The air supply unit 45 is of a conventional type in which a plurality of pipes are arranged alternately or in parallel to each other and provided with a plurality of injection nozzles on an upper surface thereof and connected to a known connection line such as a conventional air compressor to supply air.

5, it is attached to the floating filter medium 22 by the filtered water of the first washing unit 44 supplied by the pump 1 and the air supplied by the air supply unit 45, The surface cleaning (S1) is performed so as to remove the foreign matter clogged in between. At this time, the lightweight foreign matter floats and the heavy foreign matter sinks to the bottom surface of the filtration tank.

In the lower part of the air supply part 45, the floating surface material 22 having been subjected to the primary surface cleaning is supplied together with the filtered water supplied by the pump P in the cleaning filtration water tank 30 and the air of the air supply part 45 And a second cleaning unit 46 for performing secondary backwashing.

The second cleaning part 46 is also a conventional type in which a plurality of pipes such as the first cleaning part are arranged alternately or side by side and a plurality of spray nozzles are provided on the bottom surface to supply water by a pump installed at the water level position .

When the first backwashing is performed as described above, the supply of the filtered water from the first washing unit is stopped, and the filtered water and air are supplied by the second washing unit as shown in FIG. 6, so that the floating filter material is secondarily backwashed (S2) .

During the second backwashing, the foreign matter passing through the upper side filter net 21 is floated and collected by the backwashing trough 42 in the second backwashing process, And is discharged to the outside by the pump P after being discharged to the withdrawal tank 12 through the open / close valve V1.

Accordingly, various foreign substances which are adhered to the floating filter medium or clogged in the floating filter media are subjected to the first surface cleaning process and the second back washing process, so that they can be cleanly removed without foreign matter.

Therefore, when the non-point pollution is to be removed again, the purification efficiency can be improved to the maximum by the floating filter material that has been cleanly removed.

As shown in FIG. 7, the second cleaning unit 46 stops the supply of the air supplied to the air supply unit after the second backwashing, and only supplies clean filtration water in the cleaning filtration water tank to rinse the floating filter media, And further includes seating.

That is, the rinsing process (S3) of rinsing the surface of the floating filter medium by supplying only clean filtration water with the floating filter material having clean foreign matter removed during the first surface washing and the second back washing process, and the disturbed position And also serves as a role to arrange the floating media in the proper position.

In this case, the backwashing step (S) is subjected to the first surface cleaning (S1), the second backwashing (S2) and the rinsing step (S3) with respect to the floating filter medium, So as to maximize the efficiency of cleaning and stability.

8, when the rinse process and the clean-up process are completed by the second washing unit, the remaining water in the pre-treatment tank 10 as well as the filtration tank 20 is opened by opening the valve V, 12), the entire cleaning process of the non-point pollution abatement facility is cleanly completed.

This is a condition that allows the purification to be performed in a cleaner state when the next non-point pollution is removed.

Accordingly, the present invention is not only cleanly cleaned non-point pollutants but also backwashed by performing first surface cleaning and second backwashing to remove foreign matter more cleanly, and further, by rinsing and rearranging processes, It provides convenience that reuse can be done immediately without a maintenance process.

In addition, it is possible to discharge the stagnant water of the pretreatment tank as well as the filtration tank after the first and second backwashing processes, thereby keeping the nonpoint pollution abatement facility as clean as possible and purifying it even more efficiently when the non- It also has a condition that can be made.

1: Non-point pollution abatement facility
10: Pretreatment tank 10A: First partition
12: Dehydration tank 14: Floc forming barrel
14A: First barrel 14a: Inflow pipe
14B: second barrel 14b:
20: Filtration tank 20A: Second partition
21: filter net 22: floating filter media
25: filtration part 30: cleaning filtration water tank
32: Outflow pipe 40: Backwash processing section
41: Permeated water 42: Backwash trough
44: first cleaning portion 45: air supply portion
46:

Claims (5)

delete delete And a flot form of a large particle is formed as a collision between foreign substances included in the initial flotation by turning the initial flotage introduced by the floc forming barrel, Pre-treatment tank; A filtration tank in which contaminants are filtered by a filtration unit including a floating filter medium between filtration nets formed at upper and lower portions after inflow of contaminant-removed water via the pretreatment tank; And a washing filtration water tank through which the purified water flows through the filtration tank and then flows out through the outlet port. When the filtration tank is to be cleaned, or when it is expired or when it is desired to clean the floating filter media, And a backwash processing unit for processing the stagnant water after the washing process
The backwashing treatment unit of the nonpoint pollution treating facility may include a backwash trough connected to the overflow water line connected to the water collecting tank at one side of the upper part of the filtration tank, a foreign matter adhering to the surface of the floating filter medium on the floating filter medium, A first washing unit arranged to spray backwash water, which is a supernatant passed through the filtration unit, to remove foreign substances clogged between the filter media, a washing unit for washing the floating filter material at the lower part of the first washing unit, An automatic backwashing system of a nonpoint pollution abatement facility having an automatic backwashing and stagnation water treatment function comprising an air supply unit for supplying air. The method of claim 3,
And a second washing unit for performing second backwashing by supplying filtering water in the washing filtration water tank and air in the air feeding unit with the floatation material having been cleaned in the lower part of the air supply unit, Automatic backwashing system for abatement facilities. 5. The method of claim 4,
Wherein the second washing unit further comprises a filtering unit for supplying filtered water only after the second backwashing to rinse the floatation filter material and to arrange the floatation filter material.

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