KR102488107B1 - Nonpoint Pollutants Treatment Facility - Google Patents

Abstract

The present invention relates to a nonpoint pollution reduction facility capable of efficiently discharging polluted water in a sump in case of backwashing while filtering out foreign substances contained in initial rainwater, as well as facilitating maintenance. The nonpoint pollution reduction facility comprises: a primary sump into which rainwater is introduced through an introduction pipe connected to a manhole of an existing rainwater pipe to introduce the rainwater; a secondary sump divided from the primary sump by a partition; a filtration unit; a tertiary sump divided from the secondary sump by a partition; primary and secondary backwashing units; and a slope unit formed in the bottom surface of the secondary sump. Therefore, the nonpoint pollution reduction facility can increase efficiency in the guide and discharge of polluted water through the slope unit, and can facilitate maintenance after the end of rainfall through a guide rail for maintenance and the partitions.

Description

Nonpoint Pollutants Treatment Facility}

The present invention relates to a non-point pollution reduction facility that is easy to maintain as well as efficiently discharges contaminated water in a water collection tank during backwashing while filtering foreign substances included in initial rainwater.

Rainwater from the sky seeps into the ground through the surface of the earth, and some of it flows over the ground and flows into small streams. It passes through streams and flows into streams, flows into lakes, and eventually flows into the sea. During this process, water vapor flows back into the atmosphere and becomes rainwater and is circulated. In the process of circulating this water, rainwater cleans the air and cleans the roads to refresh people's minds.

However, in this circulation process, rainwater is gradually polluted due to polluted air and pollutants swept away by rainwater from roads and parking lots, which flow into rivers and become the main culprit of river pollution. deteriorate water quality. This pollution source is called rainwater pollution, and in technical terms, it is called a non-point pollution source, and the treatment facility is called a non-point pollution abatement facility.

In other words, nonpoint source pollution refers to a discharge source that causes water quality and soil pollution together with rainfall runoff from various pollutants (organic matter, nutrients, heavy metals, particulate matter, various hazardous chemicals, etc.) accumulated on the land surface during the dry season.

Types of non-point pollution abatement facilities are divided into natural facilities and device-type facilities. Of the device-type facilities, filter-type facilities collect rain runoff from a collection tank or rainwater pipe, go through a sedimentation process in a pretreatment tank, and in a filtration tank, various types of As a treatment facility that removes contaminants by passing filter media, it consists of a pretreatment tank and a filtration tank.

Various types of filter media such as granular and fibrous filter media can be used for filter media in filtering facilities. As the filter media layer is clogged as the filtration continues, the treatment efficiency decreases and the filtration flow rate decreases. Backwashing and other processing steps are required.

However, conventional filtering devices do not have facilities for washing filter media or forcibly draining stagnant water after rainfall, so if not carefully managed periodically, the filter media layer is clogged and untreated rainwater is discharged as it is. .

Therefore, the main issues in the maintenance of current filtration facilities are the frequency of backwashing and dredging. However, conventional filtration facilities do not have such automatic backwashing facilities or stagnant water removal facilities, and maintenance manpower and maintenance cost resources are insufficient. The introduction of efficient and efficient automation facilities should be sought.

In addition, when water such as underground water and valley water in rainwater pipes continues to flow even if it does not rain normally, when clean water flows into the non-point pollution reduction facility, it continues to flow into the sewage pipe or sewage treatment plant by the stagnant water exclusion facility installed in the facility. Since only the flow rate burden of the sewage treatment plant is increased, in order to prevent this phenomenon, countermeasures such as blocking external inflow water at normal times and operating non-point pollution reduction facilities only during rainfall should be taken.

Meanwhile, Korean Patent Registration No. 10-1562757 (hereinafter referred to as 'Patent Document 1') has been proposed to solve the above problems.

The patent document 1 consists of a pretreatment tank and a filtration tank in which the treated water firstly treated in the pretreatment tank flows in and a filter medium layer is formed at the bottom, and a treated water tank for storing the treated water secondarily treated to wash the filter medium layer of the filtration tank. there is.

(Patent Document 1) KR10-1562757 B1 Non-Point Pollution Reduction Facility

However, Patent Document 1 as described above has a problem in that contaminants may be discharged due to a phenomenon in which water in the filtration tank flows backward through the pretreatment tank in the process of backwashing the filtering agent.

Of course, in Patent Document 1, a weir plate in the form of a perforated plate having perforations smaller than the size of sand particles is formed between the filtration tank and the pretreatment tank, but this means that the water in the filtration tank that is not overflowing passes through the pretreatment tank, and when overflowing, the filtration tank During backwashing, floating foreign substances can be discharged by flowing back to the pretreatment tank as they are.

The non-point pollution reduction facility according to the present invention to solve the above problems is formed in the secondary water collection tank, but the inclined plate rises by the operating unit at the set low water level, and the inclined plate descends at the set high water level. At the beginning of the rain, the treated water containing pollutants flowing into the secondary catchment tank is directed to the vicinity of the check valve, and during backwashing after the water level rises, the contaminated water containing pollutants from backwashing is guided to the vicinity of the check valve. The purpose is to provide a non-point pollution reduction facility that can increase the discharge efficiency of polluted water by forcibly raising the water level near the landside.

Another object of the present invention is to form an oil detection instrument and an oil separator in a manhole so that when oil flows in through an existing rainwater pipe, the oil separator at the inlet of the inlet pipe operates to prevent oil inflow.

Another object of the present invention is to increase maintenance efficiency by easily removing large impurities in the impurities screen after the end of rainfall through a maintenance guide rail for raising and lowering the impurities screen.

Another object of the present invention is to facilitate the replacement of a single filter material by configuring a single filter material constituting a filtration unit to be detachable, fixed, and unfixed.

Another object of the present invention is to use the movable partition as a stepping stone after the operator rotates the movable partition after the end of the rain through the movable partition that rotates through the one-way rotating hinge in the fixed partition, and then performs maintenance work by using the movable partition as a foothold to achieve maintenance efficiency is to increase the

The present invention is formed in the secondary water collection tank, and the inclined plate rises by the operating unit at the set low water level and the inclined plate descends at the set high water level. The treated water is guided to the vicinity of the check valve, and when backwashing after the water level rises, the discharge efficiency of the polluted water is improved by forcibly raising the water level near the check valve while directing the contaminated water containing pollutants caused by backwashing to the vicinity of the check valve. can be raised

In addition, by forming an oil detection instrument and an oil separator in the manhole, when oil flows in through the existing rainwater pipe, the oil separator at the inlet of the inlet pipe operates to prevent oil inflow.

In addition, it is possible to increase maintenance efficiency by easily removing giant impurities in the impurities screen after the end of rainfall through a maintenance guide rail for raising and lowering the impurities screen.

In addition, the single filter material constituting the filtering unit is configured to be detachable, fixed, and unfixed, so that the replacement of the single filter material can be easily performed.

In addition, after the rain ends through a movable partition that rotates through a one-way rotating hinge in the fixed partition, the operator rotates the movable partition and then uses the movable partition as a foothold to carry out maintenance work to increase maintenance efficiency. It is an invention.

1 is a plan view showing a non-point pollution reduction facility according to the present invention.
Figure 2 is a front view of Figure 1;
Figure 3 is a perspective view showing a guide rail for maintenance in the present invention.
Figure 4 is a side view showing a filtration unit in the present invention.
5 is a state diagram showing an operating state of a partition in the present invention;
Figure 6 is a state diagram showing the operating state of the inclined portion in the present invention.

Hereinafter, looking at the present invention in more detail using the accompanying drawings as follows.

The present invention is connected to the manhole 2 of the existing rainwater pipe 1 to remove foreign substances contained in rainwater.

First, as shown in FIGS. 1 and 2 , the primary water collection tank 10 is connected by a manhole 2 and an inlet pipe 3 so that rainwater containing foreign substances is introduced.

Next, the contaminant screen 20 is installed on the side wall where the inlet pipe 3 is formed in the primary water collection tank 10 to filter out the contaminants included in the rainwater flowing into the manhole 2.

This contaminant screen 20 has a pocket-shaped receiving groove 21 formed inside, and the four sides and the lower side are made in a mesh form so that rainwater passes through and flows into the primary water collection tank 10, and impurities are stored in the receiving groove. (21) and is configured to primarily remove foreign substances.

Here, as shown in FIG. 3, a rail R for raising and lowering the impurities screen 20 is further included on the sidewall of the primary water collection tank 10 so that the manager can easily remove the impurities filtered by the impurities screen 20. is configured so that

Next, the secondary water collection tank 30 is partitioned by the above-described primary water collection tank 10 and the bulkhead W, and is a space where the primarily purified treated water of the primary water collecting tank 10 overflows the partition wall W to stay. to be.

Next, the filtration unit 40 is formed to partition the secondary water collection tank 30 in the vertical direction within the secondary water collection tank 30, and when the water level of the treated water remaining in the secondary water collection tank 30 rises, the treated water It is a configuration for secondary purification.

As shown in FIG. 4, the filtration unit 40 is coupled to the filter medium coupling unit 41 installed in the secondary water collecting tank 30 and the filter medium coupling unit 41 to accurately obtain the primary purified treated water. It consists of a filter medium 42 and a filter medium coupling part 41 formed on the hooking part 44 and a single filter medium 43 formed on the fixing part 43 that is hooked by the hooking part 44 and combined with the filter medium. The unit 41 is configured to detach, attach, and release the single filter medium 43.

Next, the partition 50 is configured to extend in the vertical direction from the side of the above-described filtration unit 40.

As shown in FIG. 5, the partition 50 includes a fixed partition 51 formed on the side of the filtration unit 40 and a one-way rotation hinge unit 52 coupled to the upper end of the fixed partition 51 and the one-way rotation It consists of a movable partition 53 rotatably coupled by a hinge part 52.

Here, it is sufficient if the one-way rotation hinge part 52 is formed in a form capable of maintaining a fixed state after the rotation partition 53 rotates in one direction.

Next, the tertiary water collection tank 60 is partitioned from the secondary water collection tank 30 by the above-described filtration unit 40 and the partition 50, and is a space in which the treated water secondarily purified through the filtration unit 40 is stored. .

That is, when the amount of primary treated water moved from the primary water collection tank 10 to the secondary water collection tank 30 increases and the water level rises, it passes through the filtration unit 40 formed at the upper end of the secondary water collection tank 30. The purified treated water can be stored, and the tertiary water collection tank 60 is configured to store the treated water up to a certain water level by the partition 50 extending upward from the side of the filtration unit 40 .

Here, it is preferable that the vertical extension height of the fixed partition 51 constituting the partition 50 extends to a higher position than the discharge pipe 4 formed in the tertiary water collecting tank 60.

Next, the primary backwashing unit 70 is formed in the secondary water collecting tank 30 to clean the filtration unit 40, and includes an air nozzle 71 for injecting air into the filtration unit 40. and an air supply pipe 72 for supplying air to the air injection port 71 and an air generator 73 for generating air.

Next, the secondary backwashing unit 80 is for washing the filtration unit 40 using the water in the tertiary water collecting tank 60, and the stagnant water pump 81 formed at the lower part of the primary water collecting tank 10 and a stagnant water pipe 82 connected to the stagnant water pump 81 and a check valve 83 formed at the lower end of the partition wall W.

Next, the inclined portion 90 is formed on the bottom surface of the above-described secondary water collecting tank 30, and the bottom surface within the secondary water collecting tank 80 when the filtration unit 80 is washed through the secondary backwashing part 80. The operating part 92 installed on the inclined plate 91 and the lower part of the inclined plate 91 so that the foreign matter deposited in the water can be guided to the check valve 83 and rises when the water level of the treated water in the secondary water collection tank 30 goes down. ) is made up of

Here, the operation unit 92 is an elastic body in the form of allowing the swash plate 91 to descend when the water level rises above the low water level set by the user so that the swash plate 91 rises and becomes inclined at the low water level set by the user. Alternatively, it may be used in various forms such as an actuator operated by a water level sensor.

Looking at the operational effects of the non-point pollution reduction facility 100 according to the present invention having the above configuration are as follows.

First of all, in the non-point pollution reduction facility 100 according to the present invention, when rainfall occurs, the initial rainwater is supplied by the weir installed in the existing rainwater pipe 1 along the manhole 2 and the inlet pipe 3 to the primary water collection tank 10 is induced by

In particular, in the present invention, an oil detection instrument (O1) is installed in the manhole (2), and an oil separator (O2) is formed between the manhole (2) and the inlet pipe (3), so that, in case of emergency, through the existing rainwater pipe (1) It is possible to prevent the oil from entering into the non-point pollution reduction facility 100 according to the present invention by detecting when the oil is introduced into the oil separator (O2) and operating.

On the other hand, when the initial rainwater induced as described above flows into the primary water collection tank 10, the impurities are filtered out by the impurities screen 20, and the treated water that has been purified primarily flows in.

Meanwhile, the treated water introduced into the primary water collection tank 10 moves to the secondary water collection tank 30 partitioned by the partition wall W as the water level rises due to continuous rainfall.

Here, on the bottom surface of the secondary water collection tank 30, an inclined part 90 composed of an operating part 92 that operates so that the inclined plate 91 rises in an inclined shape when the water level is low is formed.

Therefore, the treated water that has moved from the initial primary collection tank 10 to the secondary collection tank 30 is gathered to a position adjacent to the partition wall W by the inclined plate 91 of the inclined portion 90, and is initially concentrated in the secondary collection tank. Most of the foreign substances included in the treated water passed through (30) stay on the check valve (83) installed under the partition wall (W) constituting the secondary backwashing unit (80).

In particular, the operating part 92 constituting the inclined part 90 has a slight slope at the bottom of the secondary water collection tank 30, rather than a form in which the inclined plate 91 is completely parallel to the bottom surface when the water level is high. Since it is arranged to be in contact with the surface, even when the water level continues to rise, foreign substances included in the initially introduced treated water stay around the check valve 83.

On the other hand, when the water level rises due to the continuous increase in rainfall, as shown in FIG. 6, the inclined plate 91 is gradually lowered toward the bottom surface of the secondary water collection tank 30 by the operation part 92 of the inclined part 90. At the same time, the elevated water level is purified through the single filter medium 42 of the filtration unit 40, and the foreign substances are transferred to the secondary water collection tank 30 and the tertiary water collection tank 60 partitioned by the filtration unit 40 and the partition 50. The treated water removed is moved.

Here, the secondary treated water is treated water that has been purified to the extent that it can be discharged into the existing rainwater pipe (1).

As described above, the treated water purified by the filtration unit 40 is discharged to the existing rainwater pipe 1 through the discharge pipe 4 due to the continuous rise in water level.

On the other hand, when the rainfall ends, backwashing of the inside of the non-point pollution reduction facility 100 according to the present invention is performed.

That is, when air is generated by the air generator 73 constituting the primary backwashing unit 70, it is sprayed to the air nozzle 71 through the air supply pipe 72 to clean the filtration unit 40 through air. will be carried out

After that, sludge such as sediment in the first and second water collection tanks 10 and 30 and remaining stagnant water and the filtration unit 40 are washed through the second backwashing unit 80 .

That is, after the end of the rain, the stagnant water pump 81 constituting the secondary backwashing unit 80 installed in the primary water collecting tank 10 is operated to remove the filtration unit 40 disposed in the secondary water collecting tank 30. It is discharged to maintain the water level up to the height of the upper part of the constituting heat insulating filter medium 42.

At this time, the check valve 83 installed at the lower end of the partition wall (W) partitioning the primary water collection tank 10 and the secondary water collection tank 30 is installed to be opened by water pressure when the stagnant water pump 81 is operated, When stagnant water is discharged, it is possible to smoothly transport sludge and stagnant water on the floor, and it is possible to obtain the effect of not having to install a pump in each collecting tank to discharge the entire amount of stagnant water.

On the other hand, when the water level adjustment of the first and second water collection tanks 10 and 30 is completed as described above, the operation of the stagnant water pump 81 is stopped, and then the second air washing is performed using the first backwash unit 70, and then the second air washing is performed again. The stagnant water pump 81 of the secondary backwashing unit 80 is operated to discharge contaminated water containing foreign substances remaining in the first and second water collection tanks 10 and 30 to the outside.

Here, the inclined portion 90 is formed on the bottom surface of the secondary water collecting tank 30 in the present invention.

Therefore, when the water level in the secondary water collection tank 30 is lowered when the contaminated water is discharged through the secondary backwashing unit 80, the operating unit 92 of the inclined unit 90 operates and the inclined plate 91 rises, thereby causing foreign substances to be removed. The efficiency of cleaning can be increased by acting to induce the contained contaminated water in the direction of the check valve 83.

In particular, when the inclined plate 91 rises as described above, since the water level around the check valve 83 rises compared to when the contaminated water exists on the floor, the effect of further increasing the discharge efficiency of the contaminated water can be obtained.

On the other hand, after the end of the rain, maintenance and management of the non-point pollution reduction facility 100 according to the present invention is very important.

Accordingly, in the present invention, as shown in FIG. 3, a maintenance guide rail (R) for raising and lowering the contaminant screen 20 installed in the primary water collecting tank 10 is further included, so that after the rain is over, the operator can control the boiling point according to the present invention. During maintenance of the pollution reduction facility 100, an effect of easily removing impurities filtered in the impurities screen 20 can be obtained.

In addition, as shown in FIG. 4, the filtering unit 40 in the present invention is capable of detaching and attaching the heat insulating filter medium 42, as well as fixing and unfixing through the fixing part 43 and the hooking part 44. It is possible to obtain the effect that the replacement of the single filter medium 42 can be made easily.

In addition, the partition 50 in the present invention is formed with a movable partition 53 rotatably coupled to the fixed partition 51 by the one-way rotation hinge 52, so that the operator can move as shown in FIG. 5 after the end of the rain After rotating the partition 53, the movable partition 53 can be used as a foothold to perform internal maintenance work.

Although the above-described embodiment is described for a preferred embodiment of the present invention, it is specified that the present invention is not limited thereto and can be implemented in various forms without departing from the technical spirit of the present invention.

1: existing stormwater pipe 2: manhole 3: inlet pipe 4: discharge pipe
S: Oil detection instrument OS: Oil separator
10: 1st water tank
20 : impurity screen
21: storage groove R: guide rail for maintenance
30: 2nd water tank
W : Bulkhead
40: filtration unit
41: filter media coupling portion 42: single filter media 43: fixing portion 44: hooking portion
50: Partition
51: fixed partition 52: one-way rotation hinge 53: movable partition
60: 3rd catchment tank
70: 1st backwashing unit
71: air nozzle 72: air supply pipe 73: air generator
80: 2nd backwashing unit
81: stagnant water pump 82: stagnant water pipe 83: check valve
90: slope
91: inclined plate 92: operation part
100: non-point pollution reduction facility

Claims (6)

A primary catchment tank through which rainwater flows in through an inlet pipe connected to the manhole of the existing rainwater pipe;
An impurity screen formed on the side wall of the primary water collection tank where the inlet pipe is formed and including an impurity receiving groove in which a mesh-type net is formed on the lower side and all sides to filter out the impurity contained in rainwater flowing into the manhole;
a secondary collection tank partitioned from the primary collection tank by a partition wall and in which the treated water that has been purified and firstly purified in the first collection tank overflows the partition wall and stays there;
a filtration unit which is formed to partition the secondary water collection tank in a vertical direction within the secondary water collection tank and secondarily purifies the treated water when the water level of the treated water in the secondary water collection tank rises;
a partition formed to extend in a vertical direction from a side surface of the filtration unit;
a tertiary water collection tank partitioned from the secondary water collection tank by the filtration unit and the partition, storing the processed water secondarily purified by the filtration unit, and including a discharge pipe for discharging the treated water to the side;
a primary backwashing unit formed in the secondary water collecting tank and composed of an air nozzle for injecting air into the filtration unit, an air supply pipe for supplying air to the air nozzle, and an air generator for generating air;
A secondary backwashing unit composed of a stagnant water pump formed at the bottom of the primary water collection tank, a stagnant water pipe connected to the stagnant water pump, and a check valve formed at the lower end of the partition wall formed between the first and second water collection tanks;
Inclined portions formed on the bottom surface of the secondary water collection tank so that foreign substances deposited on the bottom surface in the secondary water collection tank can be guided to the check valve when the filtration unit is washed through the secondary backwashing unit;
An oil detection instrument and an oil separator gate are further included in the manhole,
The sidewall of the primary catchment tank further includes a guide rail for maintenance for raising and lowering the contaminant screen,
The filtration unit is composed of a filter medium coupling part installed in the secondary water collection tank, a single filter medium coupled to the filter medium coupling part, a hooking part formed in the filter medium coupling part, and a fixing part formed on the single filter medium, and the filter medium coupling installed in the secondary water collection tank. It is configured to detach, fix, and release a single filter in the unit,
The partition is composed of a fixed partition, a one-way rotation hinge part coupled to an upper end of the fixed partition, and a movable partition coupled to the one-way rotation hinge part,
The inclined part is composed of an inclined plate and an operating part installed below the inclined plate and operated according to the amount of treated water in the secondary water collection tank. It is a non-point pollution reduction facility characterized by operating so that it rises when the water pressure is lowered and the foreign substances deposited on the inclined plate are guided to the reverse side of the secondary backwash unit. delete delete delete delete delete

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