KR102203152B1 - Nonpoint Pollutants Treatment Facility - Google Patents

Abstract

The present invention relates to a non-point pollution source reduction facility configured to prevent stagnant water and sludge from moving to a tertiary water collecting tank during a backwashing operation while filtering foreign matter contained in initial rain water, thereby improving efficiency in the backwashing operation and enhancing the quality of water. The non-point pollution source reduction facility comprises: primary, secondary, and tertiary water collecting tanks; a filtering unit installed on the secondary water collecting tank; primary and secondary backwashing units; and a buoy module. In the primary water collecting tank, a stagnant water pump, a buffle plate, and a check valve are installed such that sludge and stagnant water in the primary and secondary water collecting tanks can be treated without installing a pump on each water tank, such that economic feasibility and efficiency of the backwashing operation can be increased. Overflow of stagnant water, occurring during the backwashing operation of the filtering unit in the secondary water collecting tank, can be prevented through the buoy module between the secondary and tertiary water collecting tanks, and thus, it is possible to backwash the inside of the secondary water collecting tank and the filtering unit using clean water in the tertiary water collecting tank.

Description

Nonpoint Pollutants Treatment Facility

The present invention relates to a non-point pollution reduction facility capable of improving the efficiency and water quality of backwashing by preventing stagnant water and sludge from moving to the tertiary collection tank during backwashing while filtering foreign substances contained in initial rainwater.

Rainwater from the sky seeps through the ground and into the basement, and some flows above the ground and into the stream. After passing through a stream, it flows into a river or into a lake, and eventually into the sea. During this process, water vapor flows back into the atmosphere and becomes rainwater and is circulated. In the process of circulating such water, rainwater plays a role in purifying the air and refreshing the minds of people by purifying roads.

However, due to contaminated air and pollutants swept away by rainwater from roads and parking lots during this circulation process, rainwater becomes more and more contaminated and flows into the river, becoming the main cause of river pollution. Deteriorates water quality. These pollutants are referred to as rainwater pollution, and in technical terms, they are referred to as nonpoint pollutants, and the processing facilities are referred to as nonpoint pollution reduction facilities.

In other words, the non-point source refers to a source that causes water and soil pollution along with rainfall runoff from various pollutants (organic matter, nutrients, heavy metals, particulate matter, various harmful chemicals, etc.) accumulated on the land surface during the dry season.

The types of non-point pollution reduction facilities are divided into natural facilities and device-type facilities. Among device-type facilities, filtering facilities collect rainfall runoff from a collection tank or rainwater pipe, and then go through a sedimentation process in a pretreatment tank. It is a treatment facility that removes pollutants by passing through the filter medium, and consists of a pretreatment tank and a filtration tank.

Filter media in filtration facilities can use various types of media such as granular and fibrous media, and the filter media layer is clogged as the filtration continues, resulting in a decrease in treatment efficiency and a decrease in filtration flow. Processing such as backwashing is required.

However, conventional filtration devices do not have a facility that can wash filter media or forcibly drain stagnant water after rainfall, so if it is not regularly carefully managed, the filter media layer is blocked and untreated rainwater is discharged as it is. .

Therefore, the main factors in the maintenance of current filtration facilities are the frequency of backwashing and the number of dredging. However, conventional filtration facilities do not have such automatic backwashing facilities or equipment to exclude stagnant water, and the maintenance manpower and financial resources for maintenance expenses are insufficient, so it is economical to minimize such maintenance manpower and maintenance from the initial stage of installation. Introduction of efficient and efficient automation equipment should be taken.

In addition, even if it does not rain normally, if water such as groundwater or valley water in the rainwater pipe continues to flow, clean water flows into the non-point pollution reduction facility, and 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, measures such as blocking the external inflow water at normal times and operating the non-point pollution reduction facility only during rainfall must be taken to prevent this phenomenon.

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

The patent document 1 consists of a pretreatment tank and a filter tank in which the treated water treated firstly in the pretreatment tank is introduced and a filter material layer is formed at the bottom, and a treatment water tank that stores the treated water that has been secondarily treated to wash the filter material layer of the filter tank. have.

(Patent Document 1) KR10-1562757 B1 Non-point pollution reduction facility

However, Patent Document 1 as described above has a problem in that the water in the filter tank flows back through the pretreatment tank in the process of backwashing the filter agent, and contaminants may be discharged.

Of course, in Patent Document 1, a weir plate in the form of a perforated plate having a perforation smaller than the size of sand particles is formed between the filtration tank and the pretreatment tank, but this means that the water of the filtration tank that has not overflowed passes through the pretreatment tank. When backwashing, floating foreign matter can flow back to the pretreatment tank and be discharged.

In the non-point pollution reduction facility according to the present invention for solving the above problems, a stagnant water pump, a baffle plate, and a check valve are installed in the primary cistern so that the sludge and stagnant water in the primary and secondary cistern are pumped for each tank. Its purpose is to provide a non-point pollution reduction facility that can improve the economy and efficiency of backwashing by implementing it even if it is not installed.

Another object of the present invention is to prevent the overflow of stagnant water during backwashing of the filtration unit in the second and third collection tanks through the buoy module between the 2nd and 3rd collection tanks. It is intended to allow the unit to be backwashed.

Another object of the present invention is to prevent the buoy module from moving forward and backward by the module cover when backwashing the secondary water collecting tank so that dirty water in the secondary water collecting tank does not overflow. It is intended to be able to backwash the inside of the secondary water collecting tank and the filtration unit by using.

Another object of the present invention is that the buoy module that can block the second movement path between the 2nd and 3rd collection tanks is operated by the water level of the 3rd collection tank without a separate power source, thereby preventing malfunction, reducing the ease of maintenance and cost. To be able to.

In the present invention, by installing a stagnant water pump, a baffle plate, and a check valve in the primary collection tank, the sludge and stagnant water in the primary and secondary collection tanks can be carried out without installing a pump for each tank, thereby improving the economy and efficiency of backwashing. have.

In addition, the buoy module between the 2nd and 3rd collection tanks prevents stagnant water from overflowing when backwashing the filtration unit in the 2nd collection tank, so that the inside of the 2nd collection tank and the filtration unit can be backwashed using clean water from the 3rd collection tank. I can.

In addition, the module cover prevents the movement of the buoy module in the forward and backward directions when the secondary water collection tank is backwashed, so that dirty water in the secondary water collection tank does not overflow. And backwashing the filtration unit.

In addition, the buoy module that can block the second movement path between the 2nd and 3rd collection tanks operates by the water level of the 3rd collection tank without a separate power source, so it is a useful invention to prevent malfunction, ease maintenance, and reduce costs. .

1 is a plan view of a non-point pollution reduction facility according to the present invention.
Figure 2 is a side cross-sectional view of a non-point pollution reduction facility according to the present invention.
3 is a perspective view showing a buoy module and a module cover coupled to the buoy module.
Figure 4 is a perspective view showing Figure 3 from a different angle.

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

The present invention backwashes the filtration unit 40 included in the first, second, and third water collecting tanks 10, 20, 30 and the secondary water collecting tank 20 and the filtration unit 40 formed in the secondary water collecting tank 20 It is configured to include a buoy module 70 formed between the first and second backwashing units 50 and 60 and the second and third water collecting tanks 20 and 30.

Here, between the first and second water collecting tanks 10 and 20, it is partitioned by a first partition wall W1 including a first moving path G1, and the second and third water collecting tanks 20 and 30 move second. It is bent by the partition wall W2 including the furnace G2.

First, the primary water collecting tank 10 is connected by an existing rainwater pipe 1 and an inflow pipe I as shown in FIGS. 1 to 2 so that initial rainwater can be supplied when rainfall occurs.

In the primary water collecting tank 10, an impurity receiver 11 for filtering out impurities contained in the initial rainwater is formed at a location adjacent to the inlet pipe I, and the precipitation effect is improved in the primary water collecting tank 10. A check valve formed on the lower end of the baffle plate 12 and the stagnant water pump 13 and the baffle plate 12 for transferring stagnant water and sludge from the bottom of the primary water collecting tank 10 to the sewage pipe ( 14) is configured to first purify the initial rainwater.

Next, the secondary water collecting tank 20 is configured to receive the primary treated water from the above-described primary water collecting tank 10 and perform secondary purification treatment.

This, the secondary water collecting tank 20 is supplied with the primary treated water through the first moving path (G1) formed between the primary water collecting tank 10, and the filtering unit disposed inside the secondary water collecting tank 20 ( 40), the primary treated water can be secondarily purified.

In particular, the first moving path G1 described above has a structure in which the water level rises after the primary treated water of the primary water collecting tank 10 passes through the filtration unit 40 by being formed at the bottom.

Accordingly, a secondary purification operation is performed while passing through the filtration unit 40 with the rise of the water level.

Here, the filtration unit 40 has a structure in which the first and second filtration units 41 and 42 are stacked in a multistage form, and in particular, the first and second filtration units 41 and 42 have different characteristics. It is filled with a filter medium having, but is not particularly limited, the first filtration unit 41 to allow the particulate matter to precipitate, and the second filtration unit 42 is composed of a filter medium capable of adsorbing contaminants. I can.

Next, the third water collecting tank 30 is configured to receive the secondary treated water of the second water collecting tank 20 through the second moving path G2.

The third water collecting tank 30 is treated water that has been filtered first and second by the first and second water collecting tanks 10 and 20 and can be discharged through a general rainwater pipe. It is configured to be supplied to the existing rainwater pipe (1) through the outlet pipe (B) of the water collecting tank (30).

Next, the primary backwash unit 50 is a configuration for backwashing the filtration unit 40 treated with the primary treated water in the secondary water collecting tank 20 at the end of the rainfall.

The primary backwashing unit 50 is composed of an air injection device 51, an air supply pipe 52, and an air injection port 53, and thus operates to clean the filtration unit 40.

In particular, the above-described air injection port 53 is disposed between the first and second filtration units 41 and 42 constituting the filtration unit 40 and operates to remove adsorbed pollutants to the floor.

Next, the secondary backwashing unit 60 is configured to perform backwashing of the filtration unit 40 after the first backwashing unit 50.

Such, the secondary backwashing unit 60 is disposed above the backwashing pump 61 and the water supply line 62 and the secondary water collecting tank 20 for supplying the secondary treated water in the tertiary water collecting tank 30 It consists of a water spraying part 63 for spraying water.

Next, the buoy module 70 is installed in the second movement path G2 between the 2nd and 3rd collection tanks 20 and 30 described above, and moves up and down according to the change in the water level of the 3rd collection tank 30, but When reaching, it is configured to block a part of the second moving path G2 connecting the second and third water collecting tanks 20 and 30.

Such, the buoyancy module 70 is composed of a buoyancy body 71 and a screen 72 coupled to the buoyancy body (71) as shown in FIG.

The buoyancy body 71 is made of a structure capable of generating buoyancy therein, and may be formed in any form as long as it can be lifted by buoyancy.

In addition, the screen 72 is made of a form capable of blocking the second and third water collecting tanks 20 and 30, and is preferably made of a material that is not corroded by water and is not damaged when water pressure is generated.

Here, the height of the outlet pipe (B) formed in the third water collecting tank 30 is formed at a position higher than that of the second moving path G2, and the buoy module 80 is the maximum of the third water collecting tank 30 It is preferable to form the vertical length of the screen 72 so that the uppermost end of the screen 72 is located at the same height as the lower end of the outlet pipe (B) during water level.

In particular, when the buoy module 70 is raised at the maximum, the top of the screen 72 is preferably located at a position that does not completely block the second moving path G2.

Meanwhile, in the present invention, a module cover 80 for accommodating the above-described buoy module 80 may be further included and configured.

The module cover 80 is installed in the direction in which the tertiary water collecting tank 30 is formed among the second moving paths G2 formed in the second partition wall W2, as shown in FIGS. 3 to 4, and the upper side is open. And a perforated hole 81 is formed in the left, right, front and lower sides, and a storage groove 82 capable of accommodating the buoy module 80 is formed in the space between the second partition W2 and the front. .

Particularly, on the left and right of the module cover 80, the buoy module 70 blocks overflowing water without moving in the direction of water movement by the water moving from the secondary water collecting tank 20 to the third water collecting tank 30. A sliding groove 83 is formed.

Let us look at the operation of the non-point pollution reduction facility 100 according to the present invention made of the above configuration.

First, referring to FIGS. 1 to 2, when rainfall occurs, initial rainwater is guided to the primary water collecting tank 10 along the inlet pipe (I) by the wear (1a) installed in the existing rainwater pipe (1).

When the initial rainwater is induced in this way, when it is introduced into the primary water collecting tank 10, the collected crops are firstly filtered and introduced.

On the other hand, as pollutants are precipitated on the bottom surface of the primary water collection tank by the baffle plate 12 formed inside the primary water collection tank 10, primary purification is performed.

Here, for the precipitation effect when the initial rainwater flows in, the length and width ratio of the primary water collecting tank 10 should be 1:2, but due to the disadvantage of excessive site requirements and cost, in the present invention, the baffle plate is used in the primary water collection tank 10. By forming 12, it is possible to prevent clogging of the filtration unit 40 disposed in the secondary water collecting tank 20.

On the other hand, the primary treated water, which was first purified by the impregnation of pollutants of the initial rainwater, is moved from the primary treatment tank 10 to the secondary water collection tank 20 by continuous rainfall.

Here, the first moving path G1 formed in the first partition wall W1 connecting the first and second water collecting tanks 10 and 20 is formed at the lower end.

Therefore, rainwater flowing into the primary water collecting tank 10 overflows from the baffle plate 12 and then first flows into the bottom surface of the secondary water collection tank 20 through the first moving path G1, and the water level is increased by continuous rainfall. When it rises, secondary purification is performed while passing through the filtering unit 40 installed in the secondary water collecting tank 20.

That is, the filtration unit 40 is composed of first and second filtration units 41 and 42 each filled with different filter media, so that when the water level of the secondary water collecting tank 20 rises, the filtration unit 40 passes through the first filtration unit 41. It acts to precipitate particulate matter from the first treated water, and the treated water that has passed through the first filtration unit 41 is again adsorbed by contaminants by the second filtration unit 42 to be purified secondarily. .

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

In this way, when the secondary treated water, which has been secondarily purified, rises to the position of the second movement path G2 formed in the second partition wall W2 due to the continuous rise in the water level, it is moved to the third water collecting tank 30. .

Here, a buoy unit 70 disposed at the position of the second moving path G2 by the module cover 80 is formed in the third water collecting tank 30.

Therefore, when the water level of the third water collecting tank 30 rises close to the position of the second movement path G2, the buoy module 70 rises due to the buoyancy 71 of the buoy module 70, and thus rises. When the screen 72 is moved to a position that can block a part of the second moving path G2 by the buoy module 80, the uppermost end of the screen 72 is no longer third in the secondary water collecting tank 20. Secondary treated water cannot be moved to the water collection tank 30.

Here, when the buoy module 70 is raised at the maximum, the uppermost end of the screen 72 is located at the same height as the lowermost height of the outflow pipe (B), so the uppermost end of the screen 72 constituting the buoy module 70 Until the water level of the secondary water collecting tank 20 rises, the secondary treated water is discharged to the existing rainwater pipe 1 through the tertiary treatment tank 30 and the outlet pipe (B).

Here, a plurality of perforated holes 81 are formed in the module cover 80 so that the secondary treated water can be smoothly introduced into the receiving groove 82 so that smooth operation of the buoy module 70 can be achieved. .

On the other hand, when the rainfall is over, the interior of the non-point pollution reduction facility 100 according to the present invention is backwashed.

That is, it is to wash the sludge such as sediment and the stagnant water remaining in the primary and secondary water collecting tanks 10 and 20, and the filtration unit 40, and the stagnant water pump installed in the primary water collecting tank 10 after the rainfall is finished ( 13) is operated to discharge so as to maintain the water level up to the height of the upper level of the secondary filtering unit 42 constituting the filtering unit 40 disposed in the secondary water collecting tank 20.

At this time, the check valve 14 formed at the bottom of the baffle plate 12 of the primary water collecting tank 10 is installed to be opened by the water pressure when the stagnant water pump 13 is operated. In addition to the smooth transfer of sludge and stagnant water, it is possible to obtain the effect of not having to install a pump for each collection tank to discharge the entire stagnant water.

Here, even when adjusting the water level of the first and second water collecting tanks 10 and 20 as described above, the third water collecting tank 30 maintains the water level by the buoy module 70.

On the other hand, when the water level adjustment of the first and second water collecting tanks 10 and 20 is completed as described above, the operation of the stagnant water pump 13 is stopped, and the air supply device 51 constituting the primary backwash unit 50 is Run.

The air supplied as described above is generated by air bubbles in the air injection ports 53 formed between the first and second filtering units 41 and 42 constituting the filtering unit 40 through the air supply pipe 52, The filtration unit 40 is washed.

At this time, the phenomenon in which the water including the pollutants that were first backwashed in the secondary water collecting tank 20 moves to the third water collecting tank 30 by the aeration action by the air bubbles as described above is controlled by the buoy module 70 and the module. It can be prevented through the cover 80.

That is, since the buoy module 70 is in a state that is elevated enough to partially block the first movement path G1, the stagnant water in the secondary water collecting tank 20 maintained at the level above the filtration unit 40 Even if the water level is raised by the droplets, it can be prevented from overflowing sufficiently. Moreover, even if a force acts on the screen 72 due to the aeration action, the sliding groove 83 of the module cover 80 moves in the front and rear directions. This limited screen 72 does not move and acts to prevent the movement of stagnant water and foreign substances to the third water collecting tank 30, and cleaning the filtration unit 40 using the secondary treated water of the third water collecting tank 30, which is in a clean state. It is possible to increase efficiency.

In particular, the above-described buoy module 70 is operated and adjusted in height by the water level of the third water collecting tank 30 so that there is no malfunction and can be operated without a separate power source, so that maintenance and cost reduction effects can be obtained.

On the other hand, when the operation of the first backwash unit 50 is completed, the second backwash unit 60 is operated to perform the second backwash.

That is, when the backwash pump 61 formed in the tertiary water collecting tank 30 constituting the secondary backwashing unit 60 is operated, the secondary treated water in the third water collecting tank 30 is water supply line 62 and the secondary The backwash is completed by being moved to and sprayed by the water spraying part 63 formed on the upper end of the water collecting tank 20.

After backwashing is completed through the first and second backwashing units 50 and 60 as described above, the stagnant water pump 13 installed in the first and second collecting tanks 10 is used to By moving stagnant water and sludge to the sewage pipe, it is possible to remove contaminated substances due to initial rainfall and maintain the first, second, and third water collecting tanks 10, 20, 30 and the filtering unit 40 in a clean state.

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

1: Existing Excellence Hall
I: Inlet pipe B: Outflow pipe G1: First moving route G2: Second moving route
W1: 1st bulkhead W2: 2nd bulkhead
10: 1st water collection tank
11: Narrow crop receiving 12: baffle plate 13: stagnant water pump 14: check valve
20: 2nd water collection tank
30: 3rd water collecting tank
40: filtration unit
50: 1st backwash section
51: air injection device 52: air supply pipe 53: air injection port
60: 2nd backwash section
61: backwash pump 62: water supply line 63: water spray
70: buoy module
71: buoyancy body 72: screen
80: module cover
81: perforated hole 82: storage groove 83: sliding groove
100: Non-point pollution reduction facility

Claims (6)

A primary water collecting tank in which rainwater is introduced through an inlet pipe through which rainwater flows in, connected to an existing rainwater pipe, to purify rainwater first;
A secondary water collecting tank receiving the primary treated water first purified by the primary water collecting tank through a first moving path formed in a first partition wall;
A filtration unit formed in the secondary water collecting tank to secondarily purify the primary treated water supplied through the primary water collecting tank;
A tertiary water collecting tank receiving secondary treated water secondarily purified by a filtration unit in the secondary water collecting tank through a second moving path formed in the second partition wall;
An outlet pipe formed on one side of the third water collecting tank to discharge secondary treated water from the third water collecting tank;
An air injection device that generates air, an air supply pipe connected to the air injection device, and an air supply pipe connected to the air supply pipe, but the other side is connected to the filtration unit to inject air to enable backwashing of the filtration unit through the air of the air injection device. A primary backwashing unit consisting of an air injection port;
The backwash pump installed on the bottom of the third water collecting tank, the water supply line connected to the backwash pump, and the water supply line are connected, and formed on the upper end of the second water collecting tank to receive the water from the third water collecting tank A secondary backwashing unit including a water injection unit for spraying the filtration unit of the unit;
2nd and 3rd collection tanks are installed in the direction of the 3rd collection tank among the 2nd moving paths formed in the 2nd bulkhead between the 2nd collection tank and the 3rd collection tank and float by the level of the secondary treated water processed in the 3rd collection tank. Consisting of including; a buoyancy module consisting of a buoyancy body and a screen coupled to the buoyancy body so as to block the second movement path connecting the,
The height at which the outlet pipe is formed is formed at a position higher than the height of the second moving path,
The buoy module forms a vertical length of the screen so that the top of the screen is positioned at the same height as the bottom of the outlet pipe at the maximum water level of the third water collecting tank,
Non-point pollution reduction facility characterized in that when the buoy module is raised at the maximum, the top of the screen is a position that does not completely block the second moving path.
The non-point pollution reduction facility according to claim 1, wherein the first movement path is formed at a lower side so that the water level of the primary treated water in the primary collection tank rises while passing through the filtering unit in the secondary collection tank.
The non-point pollution reduction facility according to claim 1, wherein the filtration unit comprises a first and a second filtration unit, and an air injection port of the first and second filtration units is positioned between the first and second filtration units.
delete The non-point pollution reduction facility according to claim 1, wherein the third water collecting tank further includes a module cover for accommodating the buoy module.
The method of claim 5, wherein the upper side of the module cover is open, the left, right, lower and front are formed of a plate with perforated holes to form a storage groove inside, and the left and right sides of the screen are Non-point pollution reduction facility characterized in that the buoy module forms a sliding groove to block overflowing water without moving forward or backward, which is the direction of water movement by water moving from the 2nd collection tank to the 3rd collection tank. .

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