KR20250056720A - Apparatus for reducing non-point pollution using swirl-type preprocess tank - Google Patents

Abstract

The present invention relates to a non-point source pollution reduction device equipped with a swirling flow pretreatment tank for treating contaminated water containing a large amount of non-point source pollutants during rainfall, and more specifically, to a non-point source pollution reduction device equipped with a swirling flow pretreatment tank that efficiently reduces pollutants by utilizing a strong swirling flow in the pretreatment tank.
The present invention A non-point source pollution reduction device equipped with a circulating pre-treatment tank may include a pre-treatment tank for pre-treating polluted water through sedimentation, a filtration tank for filtering pre-treated water introduced from the pre-treatment tank in an upward filtration manner through a filter layer that partitions the internal space into upper and lower parts and an air diffuser installed below the filter layer, a treatment tank for storing the filtered water introduced from the filtration tank as treated water and discharging it to the outside, and a backwash unit for cleaning the filter layer using the treated water stored inside the treatment tank as backwash water, the contaminated water treatment tank connected to a contaminated water inflow line for treating polluted water through filtration, and a control unit that is connected wired/wireless to an air diffuser and a pump installed in the contaminated water treatment tank and independently controls their operation.

Description

{APPARATUS FOR REDUCING NON-POINT POLLUTION USING SWIRL-TYPE PREPROCESS TANK}

The present invention relates to a non-point source pollution reduction device equipped with a swirling flow pretreatment tank for treating contaminated water containing a large amount of non-point source pollutants during rainfall, and more specifically, to a non-point source pollution reduction device equipped with a swirling flow pretreatment tank that efficiently reduces pollutants by utilizing a strong swirling flow in the pretreatment tank.

In general, sources of pollutants can be divided into point sources, which have clear and limited emission points, and non-point sources, which have a wide emission area.

Point sources of pollution are sources that emit water pollutants whose location and amount are relatively easy to trace, such as domestic sewage from general households or business areas, industrial wastewater discharged from factories, and livestock wastewater from large-scale livestock facilities, and are the main targets of sewage treatment.

On the other hand, non-point sources of pollution are sources that discharge water pollutants such as agricultural drainage, mine wastewater, livestock wastewater from small-scale livestock facilities, domestic wastewater from rural areas without sewer systems, or forests. These sources are either artificial or natural, have unspecified and unclear discharge points, are discharged over a wide area as they are diluted and diffused, and are difficult to predict due to significant changes in discharge amount depending on natural factors such as rainfall. In addition, collection is difficult and treatment efficiency is inconsistent, making it difficult to design and maintain treatment facilities.

Therefore, various types of non-point source pollution reduction devices are widely used to reduce water pollution caused by such non-point source pollution.

As a conventional non-point source pollution reduction device, a non-point source pollutant treatment device is known through domestic patent publication No. 10-2013-0022717.

As shown in Fig. 1, a conventional non-point source pollution reduction device is configured such that a partition (10) and a partition wall (20) are formed inside the device, and polluted water flows from an inlet (1) toward an outlet (2). In addition, the device is configured such that foreign substances are filtered by a first filter (30) and a second filter (40) provided inside the device, and a discharge pump (60) is installed to forcibly discharge the remaining polluted water to prevent the polluted water remaining inside the device from decaying after the filtering.

However, the conventional non-point source pollutant treatment device configured as described above relies solely on filtering performance for pollutant reduction, so not only is the treatment efficiency low, but a large load is applied to the first filter (30) and the second filter (40), so there is a problem that filter clogging occurs in a short period of time and the filtration rate drops rapidly as the load rate rapidly increases.

Therefore, frequent maintenance is required to remove foreign substances remaining in the first filter (30) or the second filter (40), and the management cost due to maintenance increases significantly, so improvement is required.

Republic of Korea Patent Publication No. 10-2013-0022717 (published on March 7, 2013)

The present invention has been made to solve the above-mentioned problems, and the purpose of the present invention is to provide a non-point source pollution reduction device equipped with a circulating pretreatment tank capable of reducing the load applied to the filter, thereby increasing the efficiency of reducing pollutants, extending the life of the filter, and reducing maintenance costs.

The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

In order to achieve the above object, the non-point source pollution reduction device equipped with a swirling pretreatment tank of the present invention may include a pretreatment tank for pretreating polluted water through sedimentation, a filtration tank for filtering pretreated water flowing into the pretreatment tank in an upward flow filtration manner through a filter layer that partitions an internal space into upper and lower parts and an air diffuser installed under the filter layer, a treatment tank for storing the filtered water flowing into the filtration tank as treated water and discharging it to the outside, and a backwash unit for cleaning the filter layer using the treated water stored inside the treatment tank as backwash water, the contaminated water treatment tank connected to a contaminated water inflow line to treat polluted water through filtration, and a control unit that is wired/wirelessly connected to an air diffuser and a pump installed in the contaminated water treatment tank and independently controls their operation.

In this case, a cyclone sedimentation unit that pretreats contaminated water flowing in from a contaminated water inflow line and supplies it to a filtration tank, and a first pump that discharges contaminants settled through the cyclone sedimentation unit to the outside may be installed inside the pretreatment tank.

In addition, the cyclone sedimentation unit may be equipped with a cyclone section that generates a vortex, a connecting bracket installed at the bottom of the cyclone section, and a contaminant discharge section installed on the bottom surface of a pretreatment tank in a state of being spaced apart from the cyclone section vertically through the connecting bracket and discharging contaminants that settle at the bottom of the cyclone section to the bottom surface of the pretreatment tank.

In this case, the cyclone section may be provided with an outer cylinder having a lower end joined to the connecting bracket, an inner cylinder concentrically installed inside the outer body, a contaminated water inflow pipe formed in the outer cylinder and connected to a contaminated water inflow line, a treated water discharge pipe formed in the upper portion of the inner cylinder and discharging pretreated water from which contaminants have been removed into a filtration tank, and at least one filter plate dividing the inner cylinder into upper and lower portions.

In addition, the inner cylinder is made of a ferromagnetic material, and the filter plate can be installed so as to be able to move up and down through a magnet attached to the wall surface of the inner cylinder.

Additionally, an inspection window may be installed in the center of the filter plate so as to be openable.

Meanwhile, it is preferable that the pollutant discharge portion be formed in a cone-shaped cross-section with downward slopes formed on both sides.

In addition, the reverse washing unit may be composed of a second pump installed inside the treatment tank, a first reverse washing water injection nozzle connected to the second pump to spray reverse washing water onto the upper surface of the filter layer, a coil-shaped second reverse washing water injection nozzle connected to the second pump to spray reverse washing water onto an inner edge of the filter layer, a third pump installed on the bottom of the filter tank, and a reverse washing water discharge pipe connected to the third pump connected to the first pump, the second pump, and the third pump to discharge the sprayed reverse washing water and pollutants discharged from the filter layer to the outside.

In addition, the reverse washing unit may be composed of a second pump installed inside the treatment tank, a first reverse washing water injection nozzle connected to the second pump to spray reverse washing water onto the upper surface of the filter layer, a coil-shaped second reverse washing water injection nozzle connected to the second pump to spray reverse washing water onto an inner edge of the filter layer, a check valve installed at the bottom of the wall between the pretreatment tank and the filter tank, and a reverse washing water discharge pipe connected to a third pump connected to the first pump and the second pump to discharge the sprayed reverse washing water and pollutants discharged from the filter layer to the outside.

The non-point source pollution reduction device equipped with the swirling pretreatment tank of the present invention as described above reduces the load acting on the filter layer, thereby increasing the efficiency of pollutant reduction, extending the life of the filter layer, and reducing maintenance costs. In addition, it is possible to discharge filtered water of uniform water quality that satisfies water quality discharge standards even after long-term use, thereby actively preventing pollution of rivers and ecosystems.

The effects of the present invention are not limited to those mentioned above, and also include other effects that are not explicitly mentioned but can be clearly understood by those skilled in the art from the description throughout the specification.

Figure 1 is a drawing showing a non-point source pollution reduction device equipped with a conventional vortex pretreatment tank.
Figure 2 is a drawing showing the configuration of a non-point source pollution reduction device equipped with a vortex pretreatment tank according to the present invention.
Figure 3 is a cross-sectional view of a cyclone sedimentation unit constituting the present invention.
Figure 4 is a plan view of a cyclone sedimentation unit constituting the present invention.
Figure 5 is a perspective view of a second reverse-flow spray nozzle constituting the present invention.
Figure 6 is a drawing showing a filtration process of a non-point source pollution reduction device equipped with a vortex pretreatment tank according to the present invention.
Figures 7 to 9 are drawings showing the reverse washing process of a non-point source pollution reduction device equipped with a vortex pretreatment tank in sequence.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The advantages and features of the present invention and the methods for achieving them will become apparent with reference to the embodiments described in detail below together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and the present embodiments are provided only to make the disclosure of the present invention complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Unless otherwise defined, all terms (including technical and scientific terms) used in this specification may be used in a meaning that can be commonly understood by a person of ordinary skill in the art to which the present invention belongs. In addition, terms defined in commonly used dictionaries shall not be ideally or excessively interpreted unless explicitly specifically defined. The terminology used in this specification is for the purpose of describing embodiments and is not intended to limit the present invention. In this specification, the singular also includes the plural unless specifically stated in the phrase.

The terms “comprises” and/or “comprising,” as used in the specification, do not exclude the presence or addition of one or more other components, steps, operations and/or elements.

FIG. 2 is a drawing showing the configuration of a non-point source pollution reduction device equipped with a swirling flow pretreatment tank according to the present invention. As shown, the non-point source pollution reduction device equipped with a swirling flow pretreatment tank according to the present invention includes a contaminated water treatment tank (100) that treats contaminated water through filtration, and a contaminated water inflow line (200) connected to the contaminated water treatment tank (100).

The above-mentioned contaminated water treatment tank (100) is installed underground and consists of a pretreatment tank (110) with a manhole installed at the top, a filtration tank (120), and a treatment tank (130).

The above pretreatment tank (110) is connected to the contaminated water inflow line (200), and pretreats the contaminated water flowing in through the contaminated water inflow line (200) through sedimentation.

Pretreatment of such contaminated water can be accomplished through a cyclone sedimentation unit (150) installed in a pretreatment tank (110).

As shown in FIG. 3 and FIG. 4, the cyclone sedimentation unit (150) It may be composed of a cyclone section (150-10) that generates a vortex, a connecting bracket (150-20) installed at the bottom of the cyclone section (150-10), and a pollutant discharge section (150-30) that is installed on the bottom surface of a pretreatment tank (110) in a state of being vertically separated from the cyclone section (150-10) through the connecting bracket (150-20) and discharges pollutants that settle at the bottom of the cyclone section (150-10) to the bottom surface of the pretreatment tank (110).

In this case, the cyclone section (150-10) may be provided with an outer cylinder (150-11) whose lower end is connected to the connecting bracket (150-20), an inner cylinder (150-12) concentrically installed inside the outer cylinder (150-11), a contaminated water inflow pipe (150-13) formed in the outer cylinder (150-11) and connected to a contaminated water inflow line (200), a pre-treated water discharge pipe (150-14) formed in the upper portion of the inner cylinder (150-12) and discharging treated water from which contaminants have been removed into the bottom space of the filtration tank (120), and at least one filter plate (150-15) dividing the inner cylinder (150-12) vertically.

Accordingly, the contaminated water introduced between the outer cylinder (150-11) and the inner cylinder (150-12) through the contaminated water inlet pipe (150-13) moves in a circular motion between the outer cylinder (150-11) and the inner cylinder (150-12), and in this process, the contaminants contained in the contaminated water are quickly precipitated downward by the cyclone effect. Then, the pretreated water from which the contaminants have been removed rises along the inside of the inner cylinder (150-12) and passes through the filter plates (150-15) in sequence, and the remaining contaminants are additionally removed and quickly discharged into the filtration tank (120) through the pretreated water discharge pipe (150-14).

Meanwhile, the filter plate (150-15) may be integrally fixed to the inner cylinder (150-12) using an adhesive and fixing bracket, but only when the inner cylinder (150-12) is made of a ferromagnetic material, it is preferable to install it so that it can move up and down using a magnet (150-16) attached to the wall surface of the inner cylinder (150-12).

In this case, it becomes possible to freely adjust the upper and lower positions and spacing of the filter plates (150-15), the number of installations, etc., depending on the on-site situation, such as the amount or flow rate of pollutants, and also to easily perform replacement and maintenance of the filter plates (150-15).

In addition, it is desirable that an inspection window (150-17) be installed in the center of the filter plate (150-15) so as to be openable so as to easily determine whether a problem has occurred in the lower part of the filter plate (150-15).

In addition, it is preferable that the pollutant discharge portion (150-30) be formed in a cone-shaped cross-section with downward slopes formed on both sides.

In this case, The pollutants that settle at the bottom of the cyclone section (150-10) slide along the downward slope of the pollutant discharge section (150-30) and can be smoothly discharged to the outside through the separation space (S) between the outer cylinder (150-11) and the pollutant discharge section (150-30).

Meanwhile, pollutants discharged to the outside through the above-mentioned separation space (S) move to the bottom surface of the pretreatment tank (110) and are evenly distributed around the cyclone sedimentation unit (150).

The above connecting bracket (150-20) can be firmly connected to the outer cylinder (150-11) using a fixing bolt (150-21) and a fixing nut (150-22). In this case, a fitting hole (150-23, 150-11a) into which a fixing bolt (150-21) is fitted is formed at the lower ends of the connecting bracket (150-20) and the outer cylinder (150-11), respectively.

In addition, the fitting hole (150-23) formed in the above-mentioned connecting bracket (150-20) can be formed in a slot hole shape that is long vertically. In this case, the height of the separation space (S) between the cyclone section (150-10) and the pollutant discharge section (150-30) can be freely adjusted according to the flow rate and degree of polluted water.

A pollutant discharge pipe (160) is installed inside the above-described pretreatment tank (110). In addition, a first pump (162) is installed in the pollutant discharge pipe (160). Therefore, when the first pump (162) operates, pollutants discharged to the bottom surface of the pretreatment tank (110) by the cyclone sedimentation unit (150) are discharged to the outside through the pollutant discharge pipe (160). At this time, the first pump (162) is a pump for discharging not only the pollutants described above but also stagnant water during backwash.

In addition, a water level detection sensor (300-1) for detecting the water level of stagnant water and backwash water may be installed inside the pretreatment tank (110). Based on detection by the water level detection sensor, the control unit can control the operation of the first pump (162) to discharge backwash water.

The filter tank (120) of the present invention has a filter layer (180) that divides the internal space into upper and lower parts, and an air diffuser (190) installed on the bottom of the filter tank (120) so as to be positioned below the filter layer (180), and filters pretreated water flowing in from the pretreatment tank (110) in an upward flow filtration manner.

In addition, the above-mentioned filter layer (180) may be composed of a porous body having a space inside and a filter material laid inside the porous body.

In this case, it is preferable that the porous body be manufactured from SUS (Stainless Steel) material that has excellent corrosion resistance, chemical resistance, and strength.

In addition, the above-mentioned filter material may be formed in the form of porous particles having excellent adsorption capacity.

The above filtering medium is preferably a high-elasticity polyester fiber ball that has excellent chemical resistance, is not sticky, does not change shape even after long-term use, has excellent wear resistance, has a long lifespan, and exhibits excellent performance in filtering contaminants, but is not limited thereto. For example, the filtering medium may be composed of various materials such as anthracite for removing turbidity, sand (royal sand) used as a filtering medium in a sand filter, activated carbon for removing color and odor from contaminated water, and zeolite for removing phosphate, and may be selectively composed depending on the components of the contaminated water.

Meanwhile, pretreated water that has passed through the cyclone sedimentation unit (150) installed in the pretreatment tank (110) is supplied to the bottom space of the filter tank (120) below the filter layer (180) where the air diffuser (190) is installed.

And, the treatment tank (130) stores the filtered water flowing in from the filtration tank (120) as treated water, and when the water level reaches a certain level according to the command of the control unit (500) by detection by the water level detection sensor (300-2), the second pump (141) is operated after the rain ends to supply backwash water to the filtration tank (120).

An overflow hole (121) may be formed on the wall dividing the filter tank (120) and the treatment tank (130) so that when filtered water stored in the filter tank (120) exceeds a certain water level, it overflows into the treatment tank (130). In addition, an outlet (131) may be formed on the wall of the treatment tank (130) so that when treated water stored inside the treatment tank (130) exceeds a certain water level, it overflows to the outside.

The above-mentioned reverse washing unit (140) performs the function of reverse washing the filter layer (180) using the treated water stored inside the treatment tank (130) as reverse washing water.

In this case, the reverse washing unit (140) may further include a third pump (170) and a reverse washing water discharge pipe (171) in addition to the second pump (141) installed in the treatment tank (130) and the first reverse washing water injection nozzle (142) and the second reverse washing water injection nozzle (143) installed in the filtration tank (120). At this time, the second pump (141) is a pump for reverse washing the filter medium, and the third pump (170) is a pump for discharge of reverse washing water from the filtration tank. Meanwhile, the reverse washing unit (140) may be configured to include a check valve (172) installed at the bottom of the wall between the pretreatment tank (110) and the filtration tank (120) instead of the third pump (1170). The above check valve (172) is in the form of a plate attached to the upper wall in a hinge shape, and serves to block the flow from the pretreatment tank (110) to the filtration tank (120) during the reverse washing process, and to allow the pollutants generated in the filtration tank (120) to flow to the pretreatment tank (110). If the check valve (172) is used, the third pump (170) becomes unnecessary. That is, during the reverse washing process, the water level of the pretreatment tank (110) is the bottom of the pretreatment tank (110), and the filtration tank (120) has a constant water level, so the check valve (172) opens according to the water pressure difference, and the pollutants collected on the bottom of the filtration tank (120) move from the filtration tank (120) to the pretreatment tank (110), and the moved pollutants are discharged through the pollutant discharge pipe (160) according to the operation of the first pump (162). According to this principle, the third pump (170) becomes unnecessary.

The above second pump (141) is installed inside the treatment tank (130) and supplies the treated water stored in the treatment tank (130) to the filtration tank (120).

The first reverse-flow water spray nozzle (142) is installed on the upper part of the filter tank (120) while connected to the second pump (141), receives treated water from the second pump (141), and sprays it onto the upper surface of the filter layer (180) to remove contaminants remaining in the filter layer (180).

The second reverse-flow water jet nozzle (143) is connected to the second pump (141) and installed at a corner of the inside of the filter layer (180). It receives treated water from the second pump (141) and sprays it toward the inside of the corner of the filter layer (180) to intensively remove contaminants remaining at the corner of the filter layer (180).

Fig. 5 is a perspective view of a second reverse-washing spray nozzle constituting the present invention. It is preferable that the second reverse-washing spray nozzle (143) be formed in a coil shape. In this case, the reverse-washing water sprayed through the second reverse-washing spray nozzle (143) is sprayed evenly radially to the surrounding area, thereby maximizing the reverse-washing efficiency.

Meanwhile, pollutants discharged from the filter layer (180) together with the sprayed backwash water move to the bottom space of the filter tank (120) and are discharged to the outside through the backwash water discharge pipe (171) when the third pump (170) is operated.

Meanwhile, the control unit (500) is configured to independently control operation by being connected wired/wireless to the air diffuser (190), the first pump (162), the second pump (141), the third pump (170), etc. installed in the filter tank (120).

The filtration process and backwash process of a non-point source pollution reduction device equipped with a vortex pretreatment tank according to the present invention configured as described above are described.

FIG. 6 is a drawing showing a filtration process of a non-point source pollution reduction device equipped with a vortex pretreatment tank according to the present invention. As shown, the filtration process according to the present invention is performed as follows.

First, contaminated water flows into a cyclone sedimentation unit (150) installed in a pretreatment tank (110) through a contaminated water inflow line (200).

During the process of passing through the cyclone settling unit (150), a significant amount of pollutants are precipitated in the form of flocs at the bottom of the cyclone settling unit (150). These precipitated pollutants are discharged to the outside through the pollutant discharge pipe (160) by the first pump (162).

In this way, the contaminated water is pretreated by removing a significant amount of contaminants as it passes through the cyclone sedimentation unit (150), and this pretreated water is discharged into the bottom space of the filter tank (120) through the pretreated water discharge pipe (163).

As pre-treated water flows into the bottom space of the filter tank (120), the water level of the filter tank (120) rises, and in the process of the water level rising to the upper part of the filter layer (180), upward filtration is performed through the filter layer (180).

At this time, since the filter layer (180) is provided with filter media in the form of porous particles with excellent adsorption power, the phenomenon of filter media clogging is minimized, thereby achieving very effective filtration.

Meanwhile, as the filtration of pre-treated water is continuously performed, the filtered water level inside the filter tank (120) rises and reaches the overflow hole (121), and the filtered water is naturally discharged into the treatment tank (130) through the overflow hole (121). Then, when the treated water level rises due to the filtered water supplied to the treatment tank (130) and reaches the discharge port (131), the treated water inside the treatment tank (130) is naturally discharged to the outside.

When the filtration process is completed as described above, the reverse filtration process is periodically performed by the manager or control unit as follows.

First, as shown in Fig. 7, when the air diffuser (190) and the third pump (170) are operated, the filtered water stored inside the filter tank (120) is rapidly discharged to the outside through the reverse water discharge pipe (171).

In this process, coarse contaminants remaining in the filter layer (180) are peeled off and detached from the filter layer (180) by the bubbles ejected through the air diffuser (190), thereby forming the first air backwash. At this time, the air diffuser (190) is connected to the air backwash blower (191), and the air backwash blower (191) is operated under the control of the control unit (500) to supply air to the air diffuser (190).

As shown in Fig. 8, if the control unit (500) determines that the water level of the filter tank (120) has reached the upper surface of the filter layer (180) through the water level sensor (300) installed in the filter tank (120), the operation of the third pump (170) is stopped. In this way, concentrated secondary air backwash is performed through the air diffuser (190) in the bottom space of the filter tank (120), and fine pollutants remaining in the filter layer (180) are intensively disturbed and peeled off.

This secondary air backwash is performed for a set period of time (preferably 8 to 10 minutes), and when the set period of time has elapsed, the control unit (500) restarts the third pump (170), thereby causing all of the filtered water remaining in the filter tank (120) and the disturbed and peeled micro-pollutants to be discharged to the outside through the backwash water discharge pipe (171).

When all of the filtered water and the disturbed and peeled micro-pollutants remaining in the filter tank (120) are discharged to the outside, the control unit (500) stops the operation of the third pump (170) and starts the second pump (141) installed in the treatment tank (130).

As shown in Fig. 9, when the second pump (141) is operated, the treated water stored in the treatment tank (130) is sprayed as backwash water onto the upper surface of the filter layer (180) through the first backwash water injection nozzle (142) connected to the second pump (141) and is simultaneously sprayed onto the inner part of the corner of the filter layer (180) through the second backwash water injection nozzle (143).

Accordingly, concentrated water washing is performed on the upper surface of the filter layer (180) and the corners inside the filter layer (180), and after the second air washing, the fine pollutants remaining on the upper surface of the filter layer and the corners inside the filter layer (180) are finally cleanly removed.

The above-described backwashing is performed for a set time (preferably 50 to 70 seconds), and when the set time has elapsed, the control unit (500) restarts the third pump (170) to discharge all backwash water remaining in the filter tank (120) to the outside through the backwash water discharge pipe (171).

In this way, the reverse washing process according to the present invention is carried out very efficiently through two-stage air reverse washing by an air diffuser (190) installed in a filter tank (120) and water reverse washing through a first reverse washing water spray nozzle (142) and a second reverse washing water spray nozzle (143).

Accordingly, clogging of the filter layer (180) does not occur easily, and the filtration performance can be stably maintained even for long-term use.

Although the embodiments of the present invention have been described with reference to the attached drawings, those skilled in the art will understand that the present invention can be implemented in other specific forms without changing the technical idea or essential features thereof. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive.

100: Contaminated water treatment tank
110: Pretreatment tank
120: Filtration tank
130: Processing tank
140: Reverse Unit
141: 2nd pump
142: No. 1 reverse-flow spray nozzle
143: Second reverse water spray nozzle
150: Cyclone Sedimentation Unit
160: Pollutant discharge pipe
161: Branch pipe
162: 1st pump
170: 3rd pump
171: Backwash water discharge pipe
172: Check valve
180: The female layer
190: Air Diffuser
191: Air reverse blower
200: Contaminated water inlet line
500: Control Unit

Claims (9)

A pretreatment tank that pretreats contaminated water through sedimentation;
A filtration tank that filters pretreated water flowing from the pretreatment tank using an upward filtration method through a filter layer that divides the internal space into upper and lower parts and an air diffuser installed at the bottom of the filter layer;
A treatment tank that stores the filtered water flowing from the above filter tank as treated water and discharges it to the outside; and
A contaminated water treatment tank that is connected to the contaminated water inflow line and treats contaminated water through filtration, including a backwash unit that cleans the filter layer using the treated water stored inside the treatment tank as backwash water.
A non-point source pollution reduction device equipped with a circulating pretreatment tank including a control unit that is independently controlled by connecting wired/wireless to an air diffuser and a pump installed in the above-mentioned contaminated water treatment tank. In paragraph 1,
A non-point source pollution reduction device having a cyclone pretreatment unit installed inside the above pretreatment tank, which pretreats polluted water flowing in from a polluted water inflow line and supplies it to a filtration tank, and a circulating pretreatment tank having a first pump installed therein to discharge pollutants precipitated through the cyclone precipitation unit to the outside. In the second paragraph,
The above cyclone sedimentation unit
Cyclone section that generates swirling flow;
A connecting bracket installed at the bottom of the above cyclone section; and
A non-point source pollution reduction device equipped with a circulating pretreatment tank having a pollutant discharge unit installed on the bottom surface of the pretreatment tank in a state of being vertically separated from the cyclone section through the above-mentioned connecting bracket and discharging pollutants that settle at the bottom of the cyclone section to the bottom surface of the pretreatment tank. In the third paragraph,
The above cyclone section
An outer cylinder having a lower end joined to the above connecting bracket;
An inner cylinder concentrically installed inside the outer body;
A contaminated water inflow pipe formed in the above outer cylinder and connected to a contaminated water inflow line;
A treated water discharge pipe formed on the upper part of the inner cylinder to discharge pretreated water from which contaminants have been removed into a filter tank;
A non-point source pollution reduction device having a circulating pretreatment tank having at least one filter plate dividing the inner cylinder into upper and lower sections. In paragraph 4,
The above inner cylinder is made of a ferromagnetic material;
The above filter plate is a non-point source pollution reduction device equipped with a vortex pretreatment tank installed so that it can move up and down through a magnet attached to the wall of the inner cylinder. In paragraph 4 or 5,
A non-point source pollution reduction device equipped with a circulating pretreatment tank with an openable inspection window installed in the center of the above filter plate. In the third paragraph,
The above pollutant discharge unit is a non-point source pollution reduction device equipped with a vortex pretreatment tank having a cross-sectional shape of a cone with downward slopes formed on both sides. In the second paragraph,
The above reverse osmosis unit
A second pump installed inside the above treatment tank;
A first reverse-wash water spray nozzle connected to the second pump and spraying reverse-wash water onto the upper surface of the filter layer;
A coil-shaped second reverse-washing water spray nozzle connected to the second pump and spraying reverse-washing water onto the inner edge of the filter layer;
A third pump installed at the bottom of the above filter tank;
A non-point source pollution reduction device equipped with a circulating pretreatment tank, which is connected to the first, second, and third pumps and is configured with a backwash discharge pipe for discharging backwash water injected and pollutants discharged from the filter layer to the outside. In the second paragraph,
The above reverse osmosis unit
A second pump installed inside the above treatment tank;
A first reverse-wash water spray nozzle connected to the second pump and spraying reverse-wash water onto the upper surface of the filter layer;
A coil-shaped second reverse-washing water spray nozzle connected to the second pump and spraying reverse-washing water onto the inner edge of the filter layer;
A check valve installed at the bottom of the wall between the above pretreatment tank and the filtration tank;
A non-point source pollution reduction device equipped with a circulating pre-treatment tank that is connected to the first and second pumps and is configured with a backwash discharge pipe that discharges the sprayed backwash water and pollutants discharged from the filter layer to the outside.

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