KR102230225B1 - Apparatus for treating Non-point Contaminants - Google Patents

Abstract

The present invention relates to an apparatus for treating a non-point source of pollution. According to the present invention, the apparatus for treating a non-point source of pollution comprises: a pretreatment tank including an inlet portion through which polluted water washed in rainwater flows in, and a swash plate inducing precipitation of the pollutants to change a flow path in the polluted water; and a filter tank which has a filter medium receiving unit including a filter medium for filtering the polluted water introduced from the pretreatment tank, and an outlet through which the polluted water is discharged after passing through the filter medium receiving unit.

Description

Apparatus for treating Non-point Contaminants}

The present invention relates to a non-point source treatment apparatus, and particularly, when treating contaminated water contaminated by initial rainwater, the space for treating contaminated water is efficiently utilized, does not hinder the flow of contaminated water, and prevents contaminated water. It relates to an apparatus for treating non-point source pollutants that facilitates washing of filter media to be filtered.

In general, the sources of contaminated water are classified into point sources and non-point sources. A point source is a case where the outlet of contaminated water is specified as a certain place, and a non-point source is defined as a case where the outlet of contaminated water is not constant.

Point sources include sewage treatment plants, livestock, manure, wastewater, household wastewater, wastewater treatment plants in industrial plants, and leachate. Non-point sources include pollutants accumulated on the top of roads and bridges, fine dust such as tires, and animals. And plant residues and air pollutants that have fallen to the surface.

Non-point pollutants are a representative cause of water pollution because they are washed together with rainwater when it rains and flows directly into the river. Therefore, it is required to process the initial excellence according to a predetermined standard. Non-point pollutants are discharged through drainage along with rainwater, and since the initial rainwater contains a large amount of pollutants, purification work is very important in the case of initial rainwater.

An object of the present invention is to provide a treatment device that effectively removes contaminants without disturbing the flow of contaminated water and facilitates cleaning of a filter medium for filtering contaminants.

The present invention was devised in accordance with the above-described request, and when treating contaminated water contaminated by initial rainwater, the space for treating contaminated water is efficiently utilized, does not hinder the flow of contaminated water, and It is an object of the present invention to provide an apparatus for treating non-point pollutants that facilitates washing of a filter medium to be filtered.

A non-point source treatment apparatus according to an embodiment of the present invention includes a pretreatment tank including an inlet through which contaminated water washed into rainwater flows into, and a swash plate for inducing the precipitation of the contaminants that change the flow path of the contaminated water, and the pretreatment And a filtration tank having a filter material receiving unit including a filter medium for filtering contaminated water introduced from the tank, and an outlet through which the contaminated water passes through the filter material receiving unit and is discharged.

In addition, the inlet portion, the inlet tube portion in the form of an open upper and lower portions; First and second rectifying plates having a plurality of through-holes through which contaminated water passes, and spaced apart from each other in an up-down direction in the inflow tube portion; It is preferable to include; a support leg for supporting the inflow tube part by being spaced apart from the bottom surface.

In addition, the inclined plate includes a first inclined portion disposed obliquely extending in a first direction, and a second inclined portion disposed obliquely extending in a second direction intersecting while having a predetermined angle with the first direction. In addition, a plurality of the swash plates are provided inside the pretreatment tank, and the contaminated water is preferably moved along a space between the swash plates spaced apart from each other.

In addition, it is preferable that a plurality of the swash plates are provided, and the contaminated water moves along the space between the swash plates spaced apart from each other, and the swash plates include protrusions disposed to be spaced apart from each other, and a groove provided between the protrusions. .

In addition, it is preferable that the first inclined portion and the second inclined portion form an angle of 110° or more to 130° or less when viewed from the side.

In addition, a rotating member including an impeller disposed in the filter medium receiving portion and a rotating shaft extending from the impeller; And a motor for providing power to the rotating member.

In addition, it is preferable that the impeller includes a plurality of blades, and each blade includes a main blade portion coupled to the rotation shaft, and a serrated vortex forming portion coupled to a lower end portion of the main blade portion.

In addition, it is preferable that the cross section of the rotation shaft is polygonal.

In addition, it is preferable that the impeller has a protrusion protruding from the surface of each blade, and at least one vortex forming hole is formed on the surface of each blade. of

In addition, it is preferable that an air injection part for washing the filter medium is provided below the filter medium receiving part.

In addition, it is preferable that an inlet pipe for guiding the contaminated water to the inlet is provided, and an end of the inlet pipe through which the contaminated water is discharged is tapered outward so as to have a diameter larger than that of the inlet pipe.

In addition, it is preferable that the pretreatment tank includes a retention tank in which the contaminated water passes through the swash plate and stays before flowing into the filtration tank.

The non-point source treatment apparatus according to the present invention, when treating contaminated water contaminated by initial rainwater, efficiently utilizes the space of the apparatus for treating contaminated water, does not hinder the flow of contaminated water, and removes contaminated water. It provides an effect of facilitating washing of the filtering medium to be filtered.

1 is a plan view of a non-point source treatment apparatus according to an embodiment of the present invention;
Figure 2 is a side view of Figure 1;
Figure 3 is a view showing the inlet;
Figure 4 is a view showing the inlet pipe,
Figure 5 is a cross-sectional view of Figure 1;
6 is a view showing a swash plate;
7 is a cross-sectional view of a filtration tank,
8 is a view showing a filter material cleaning unit;
9 is a view showing an excerpt of an impeller;
10 is a view showing an air injection unit;
11 is a view showing a filter medium;
12 is a view showing an impeller according to another embodiment.

Hereinafter, various embodiments of the present invention will be described in connection with the accompanying drawings. Various embodiments of the present invention may be modified in various ways and may have various embodiments. Specific embodiments are illustrated in the drawings and detailed descriptions thereof are provided. However, this is not intended to limit the various embodiments of the present invention to a specific embodiment, it should be understood to include all changes and/or equivalents or substitutes included in the spirit and scope of the various embodiments of the present invention. In connection with the description of the drawings, similar reference numerals have been used for similar elements.

Expressions such as "include" or "may include" that may be used in various embodiments of the present invention indicate the existence of a corresponding function, operation, or component that has been disclosed, and an additional one or more functions, operations, or It does not limit the components, etc. In addition, in various embodiments of the present invention, terms such as "comprises" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, It is to be understood that it does not preclude the possibility of the presence or addition of one or more other features or numbers, steps, actions, components, parts, or combinations thereof.

When a component is referred to as being "connected" to another component, the component may be directly connected to the other component, but a new other component between the component and the other component. It should be understood that may exist. On the other hand, when a component is referred to as being "directly connected" or "directly connected" to another component, it will be understood that no new other component exists between the component and the other component. Should be able to.

The terms used in various embodiments of the present invention are only used to describe a specific embodiment, and are not intended to limit the various embodiments of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

Unless otherwise defined, all terms including technical or scientific terms used herein have the same meaning as commonly understood by a person of ordinary skill in the art to which various embodiments of the present invention belong.

Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and ideal or excessively formal unless explicitly defined in various embodiments of the present invention. It is not interpreted in meaning.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a plan view of a non-point source treatment apparatus according to an embodiment of the present invention, and FIG. 2 is a side view of FIG. 1. Figure 3 is a view showing the inlet, Figure 4 is a view showing the inlet pipe. Fig. 5 is a cross-sectional view of Fig. 1, and Fig. 6 is a view showing a swash plate. 7 is a cross-sectional view of a filter tank, and FIG. 8 is a view showing a filter material washing unit. 9 is a view showing an excerpt of an impeller, and FIG. 10 is a view showing an air injection unit. FIG. 11 is a view showing a filter medium, and FIG. 12 is a view showing an impeller according to another embodiment.

Referring to FIG. 1, an apparatus 100 for treating a non-point pollutant source according to an embodiment of the present invention includes a pretreatment tank 10 and a filtration tank 20.

The pretreatment tank 10 includes an inlet 11 through which contaminated water washed into rainwater is introduced, and the contaminated water enters the inlet 11 through an inlet pipe 13. The pretreatment tank 10 is installed at the front end of the filtration tank 20, which is a main treatment process, to remove particulate solids and impurities having a large specific gravity, thereby mitigating the clogging phenomenon in the filtration tank 20, It is provided to improve performance efficiency.

As shown in FIG. 3, according to this embodiment, the inlet portion 11 includes an inlet cylinder portion 111, first and second rectifying plates 112 and 113, and a support leg 114.

The inlet tube part 111 has an open upper and lower part, and the inlet pipe 13 is disposed above the inlet tube part 111. The inflow cylinder 111 forms a cylindrical shape in which a bent frame is fixed to the inner wall of the pretreatment tank 10 to open in the vertical direction. The lower end of the inlet tube 111 is spaced upward from the bottom of the pretreatment tank 10.

As shown in Fig. 4, the inlet pipe 13 guides the contaminated water to the inlet part 11, and the end of the inlet pipe 13 from which the contaminated water is discharged is a tapered portion tapered outward to increase the diameter. It has (131). The tapered portion 131 of which the diameter of the end of the inlet pipe 13 is increased reduces the speed of the introduced contaminated water to prevent the contaminated water from rising rapidly.

The first and second rectifying plates 112 and 113 are used to prevent the occurrence of a short circuit flow due to the rapid flow velocity of the initial rain flowing into the inlet tube 111 and to uniformly control the flow of contaminated water. It is prepared.

The first and second rectifying plates 112 and 113 are formed with a plurality of through holes 115 through which contaminated water passes. The first and second rectifying plates 112 and 113 are disposed to be spaced apart from each other in the vertical direction inside the inflow cylinder 111. The first rectifying plate 112 is installed above the inlet tube part 111, and the second rectifying plate 113 is disposed below the first rectifying plate 112. By installing the first and second rectifying plates 112 and 113 in a direction perpendicular to each other, the contaminated water is reduced two times compared to the initial inflow rate, reducing the inflow rate, and improving the efficiency of removing contaminants contained in the contaminated water. .

The support leg 114 is provided to support the inlet tube 111 by being spaced apart from the bottom surface. According to the present embodiment, since the inflow cylinder 111 is coupled to the inner wall of the pretreatment tank 10 with the bending frame, two support legs 114 are provided at the lower end of the bending frame. Of course, the number of installations of the support legs 114 is not limited thereto.

Since the inlet cylinder 111 is kept spaced apart from the bottom of the pretreatment tank 10, the contaminated water that has passed through the second rectifying plate 113 and dropped downward passes through the inlet cylinder 111 It is filled from below.

The pretreatment tank 10 is provided with a swash plate 12 for inducing the precipitation of contaminants contained in the contaminated water while changing the flow path of the contaminated water introduced therein. The swash plate 12 secures a long sedimentation time of contaminants contained in the contaminated water by changing the flow path of the contaminated water, and improves the sedimentation efficiency by increasing the area in which the contaminated water comes into contact with the swash plate 12, and pretreatment The contaminated water moving from the tank 10 to the filtration tank 20 is purified.

In addition, the pretreatment tank 10 reduces the load of the filtering tank 20 by sedimenting and removing the contaminants contained in the contaminated water before the contaminated water flows into the filtering tank 20. Since the swash plate 12 does not require repetitive replacement, it is easy to maintain and provides an inexpensive effect in terms of cost.

As shown in FIG. 5, the swash plate 12 refers to a plate-shaped structure disposed at an oblique angle with respect to the vertical direction of the pretreatment tank 10 when the pretreatment tank 10 is viewed from the side. According to the present embodiment, as shown in FIG. 1, a plurality of swash plates 12 are provided inside the pretreatment tank 10. The swash plates 12 are disposed to be spaced apart from each other, and the contaminated water moves along a space between the swash plates 12 spaced apart from each other.

According to this embodiment, the inclined plate 12 includes a first inclined portion 121 and a second inclined portion 122.

The first inclined portion 121 is a plate-shaped structure disposed obliquely extending in the first direction. The first direction refers to a direction in which the pretreatment tank 10 is obliquely inclined to cross the vertical height direction. 5, the first inclined portion 121 is disposed so as to be inclined to the right from the top to the bottom.

The second inclined portion 122 is a plate-shaped structure disposed obliquely extending in a second direction intersecting with the first direction while having a predetermined angle. When the second direction intersects the first direction, it means that the virtual line extending along the first direction and the virtual line extending along the second direction have a predetermined angle to each other.

As shown in FIG. 6, according to the present embodiment, the first inclined portion 121 and the second inclined portion 122 are arranged to form an angle θ1 of 110° or more to 130° or less. Fig. 6 is a schematic diagram when viewed from the side as shown in Fig. 5. Accordingly, the first inclined portion 121 and the second inclined portion 122 have a ">" shape. The first and second inclined portions are disposed so as to achieve an angle within the above range, so that the flow path of the contaminated water is prevented from rapidly changing and the contaminants can be removed while smoothly flowing.

In addition, the second inclined portion 122 is disposed to be inclined at an angle θ2 of 55° or more to 65° or less with respect to the horizontal direction. Since the second inclined portion 122 is inclined to the above range, contaminated water may smoothly flow into the space between the inclined plates 12.

According to this embodiment, the swash plate 12 includes a protrusion 31 and a groove 32 to secure a wide contact area with contaminants contained in contaminated water.

As shown in Fig. 1, the protrusions 31 are spaced apart from each other and protrude from the surface of the swash plate 12, and between the protrusions 31 and the protrusions 31 are located below the protrusions 31. A groove 32 is formed. The protruding portion 31 and the groove portion 32 are continuously repeated and provided. The surface of the protrusion 31 and the groove 32 increases the contact area of the contaminated water, thereby improving the collision and precipitation efficiency of contaminants.

According to the present embodiment, since a plurality of the swash plates 12 are provided to be spaced apart from each other, a space formed by the swash plates 12 being spaced apart from each other forms a flow path through which contaminated water flows. The contaminated water rising from the bottom of the pretreatment tank 10 further moves upward along the flow path partitioned by the swash plate 12, and the contaminants collide with the swash plate 12 and settle, and the direction of the flow path changes when rising. As a result, the flow path is elongated and the contaminated water collides in the bent portion to effectively settle the contaminants.

The plurality of swash plates 12 and the protrusions 31 and the grooves 32 formed on each swash plate 12 reduce the moving speed of the contaminated water to sufficiently remove contaminants in the pretreatment tank 10 I can do it.

According to this embodiment, the pretreatment tank 10 includes a retention tank 60. The retention tank 60 allows the contaminated water that has passed through the swash plate 12 to remain before flowing into the filtering tank 20. Contaminated water is retained by the retention tank 60, so that even if a large amount of rainwater is introduced in a short time, the contaminated water is primarily stored and retained, and the contaminant is settled while reducing the flow rate.

The filtration tank 20 is provided to filter contaminated water introduced from the pretreatment tank 10 by a filter medium and discharge it to the outside. According to the present embodiment, the filter medium for filtering the contaminated water is accommodated in the filter medium receiving unit 21, and the contaminated water passes through the filter medium receiving unit 21 and is then discharged through the outlet.

As shown in FIG. 2, the filter material receiving part 21 is provided by dividing the space inside the filter tank 20 to have a predetermined height so as to accommodate the particulate filter material. The filter material receiving part 21 may be provided by installing the perforated plates 211 in the horizontal direction in the filtering tank 20 and spaced apart from each other, and the filter material is filled in the space formed by the perforated plates 211. The contaminated water is introduced into the lower portion of the filtration tank 20 and flows upward and passes through the filter material receiving part 21, and in this process, the contaminants contained in the contaminated water are adsorbed to the filter material. The outlet is provided above the filter material receiving part 21.

The filter medium is a hydrophobic foamed polymeric filter medium and is provided to effectively remove fine suspended matter or oil not removed from the pretreatment tank 10 by adsorbing and filtering on the surface. The filter medium applied to this embodiment is formed in a size of about 3.5mm to 4.5mm by forming a cross shape. The material of the filter medium is made of expanded polypropylene (EPP).

As shown in Fig. 11, since the filter medium is formed in a cross shape, the contact area with the contaminated water is increased, and when the filter medium is accommodated in the filter medium receiving part 21, a large porosity is secured to inhibit the flow of contaminated water. Without doing so, it improves the efficiency of removing pollutants such as floating matter.

The filter medium has a low specific gravity and high abrasion resistance, so it can be used semi-permanently because it does not wear out and withstands frequent friction, and because its specific gravity is low, it can be washed with low pressure air and water, and maintenance is easy because it can be cleaned within a short time. Do.

The non-point source treatment apparatus 100 according to the present embodiment includes a filter medium washing unit 40.

As shown in Figs. 7 and 8, the filter material cleaning unit 40 is provided to wash the contaminants remaining after being adsorbed or filtered by the filter material, and includes a rotating member 41 and a motor 42. .

The rotation member 41 includes an impeller 411 disposed in the filter medium receiving portion 21 and a rotation shaft 412 extending from the impeller 411. According to this embodiment, the impeller 411 is disposed in a state accommodated in the filter material receiving part 21 together with the filter material, and the rotation shaft 412 is connected to the impeller 411 and protrudes upward. .

According to this embodiment, the impeller 411 is made of a plurality of wings. As shown in Fig. 9, each wing includes a main wing portion 43 and a vortex forming portion 44. The main blade part 43 is a part coupled to the rotation shaft 412, and the vortex forming part 44 is provided to collide and mix the filter medium by forming a vortex when the impeller 411 rotates. It is coupled to the lower end of the wing portion 43 in a serrated shape. In addition, according to the present embodiment, as shown in FIG. 8, the cross section of the rotation shaft 412 is formed in a polygonal shape, so that when the rotation shaft 412 rotates, it collides with the filter material to improve the stirring efficiency.

In addition, as shown in FIG. 12, according to another embodiment of the present invention, the impeller 411 may include a protrusion 45 and a vortex forming hole 46. The protrusions 45 are formed to protrude from the surface of each wing of the impeller 411. At least one vortex forming hole 46 is formed on the surface of each wing.

When the impeller 411 rotates, the protrusion 45 collides with the filter medium so that contaminants adsorbed on the filter medium are effectively removed, and the vortex forming hole 46 is rotated when the impeller 411 is rotated. A vortex is formed so that the filter media are well mixed, so that pollutants are effectively eliminated by collisions between the filter media.

12 shows an example in which the protrusion 45, the vortex forming hole 46, and the vortex forming portion 44 are formed together in the impeller 411. As shown in FIG. Of course, it may be implemented so that only the protrusion 45 and the vortex forming hole 46 are formed.

The non-point source treatment apparatus 100 according to an embodiment of the present invention includes an air injection unit 50 provided under the filter material receiving unit 21 for washing the filter material. As shown in Fig. 10, the air injection unit 50 includes a main pipe 51 for injecting air, a branch pipe 53 for distributing the air, the main pipe 51 and the branch pipe 53. ) And a connection pipe 52 to connect.

The main pipe 51 is vertically disposed in the filtration tank 20 so that air can be injected from the upper side of the filtration tank 20. The connection pipe 52 extends horizontally from the end of the main pipe 51. The branch pipe 53 is coupled to the connection pipe 52, and a blowout hole 531 for distributing air introduced through the main pipe 51 is formed. A plurality of branch pipes 53 are connected to the connection pipe 52.

Hereinafter, the operation of the non-point pollution source treatment apparatus 100 according to the above configuration will be described in detail.

When contaminated water washed by rainwater flows into the non-point source treatment apparatus 100 according to the present invention together with contaminants, the contaminated water transferred through the inlet pipe 13 is discharged through the tapered area at the end of the inlet pipe 13 The speed is reduced and flows into the inlet 11.

As the contaminated water passes through the first rectifying plate 112, the flow rate is reduced, large contaminants are filtered out, and the contaminated water passes through the second rectifying plate 113 again, the flow rate is reduced again, and the contaminants are filtered out again. , It exits to the lower portion of the inlet tube 111.

The contaminated water is filled from the lower part of the area of the pretreatment tank 10 in which the swash plate 12 is provided, and the water level rises upward. At this time, the contaminated water flows along a flow path divided by a plurality of inclined plates 12, and sequentially passes through the second inclined portion 122 and the first inclined portion 121, while the contaminated water flows through the protrusion 31 and Contaminants are settled in contact with the groove 32. In addition, since the first inclined portion 121 and the second inclined portion 122 are bent to have a predetermined angle, the flow velocity at which the contaminated water rises is reduced to ensure sufficient time for the contaminant to settle.

The contaminated water passing through the swash plate 12 is moved to the retention tank 60 to retain the contaminated water for a predetermined period of time, and a time for the contaminant to precipitate is secured. Subsequently, the contaminated water flows into the lower portion of the filtration tank 20 and passes through the filter material receiving portion 21 while the water level rises upward from the lower portion of the filtration tank 20. The filter medium accommodated in the filter medium receiving part 21 adsorbs and filters pollutants contained in the polluted water, and is finally discharged through an outlet. A post-treatment tank may be provided at the rear end of the filtration tank 20 for storing and discharging the filtrate from which contaminants have been filtered.

By such a process, the apparatus 100 for treating a non-point source of pollution according to the present invention can effectively utilize a relatively narrow space to efficiently perform sedimentation and filtration of contaminants. The flow rate of the incoming rainwater is sufficiently reduced so that the pollutants can be effectively settled, and the pollutants are adsorbed and filtered secondarily by the filter medium, thereby enabling water treatment that meets environmental standards.

Meanwhile, the apparatus 100 for treating a non-point source of pollution according to the present invention cleans the filter medium through the filter medium washing unit 40 and the air injection unit 50 as follows.

When the rainfall is over and the contaminated water due to rainwater in the pretreatment tank 10 and the filtering tank 20 is filled above a certain level, first, the contaminated water accumulated in the pretreatment tank 10 is drained. The contaminated water is pumped using a pump and drainage pipe provided in advance, and the pumped contaminated water is transferred to a sewage treatment plant or a wastewater treatment facility for treatment.

Subsequently, the contaminated water accumulated in the filter tank 20 is drained to the upper end of the filter material receiving part 21. Contaminated water in the filtration tank 20 may also be transferred to a sewage treatment plant or a wastewater treatment facility for treatment. When the level of contaminated water falls near the upper end of the filter material receiving part 21, the filter part washing part is operated. By providing power to the rotating member 41 by the motor 42, the rotating member 41 rotates in the presence of contaminated water to mix the filter medium.

In this process, the rotating member 41 collides with the filter medium, and contaminants adsorbed on the filter medium are eliminated. More specifically, when the rotating member 41 rotates, a vortex is formed by the vortex forming unit 44 to improve the mixing efficiency of the filter medium. When the protrusions 45 and the vortex forming hole 46 are formed on the surface of the blade, the protrusion 45 collides with the filter medium to eliminate contaminants, and the vortex forming hole 46 increases the mixing efficiency of the filter medium so that the filter medium is As they mix, they bump into each other and eliminate contaminants.

After the filter material washing unit 40 is operated, air is injected by the air injection unit 50 after a predetermined time to remove contaminants from the filter material together with the filter material washing unit 40. For example, 30 seconds to 1 minute after the filter medium washing unit 40 is operated, the filter medium is washed while injecting air through the air injection unit 50.

Even in the process of simultaneously operating the filter material washing unit 40 and the air injection unit 50, the contaminated water stored in the filtration tank 20 is pumped and discharged. When the water level of the contaminated water is lowered to the rotating member 41, the operation of the filter medium washing unit 40 is stopped and air is continuously supplied through the air injection unit 50 to perform washing. When the level of the contaminated water is lowered to the level at which the branch pipe 53 of the air injection unit 50 is disposed, the injection of air through the air injection unit 50 is stopped, and the remaining contaminated water is pumped and discharged. .

In this way, while the contaminated water accumulated in the filter tank 20 is pumped and discharged, the filter material is washed without separate water washing by using the filter material washing unit 40 and the air injection unit 50. The contaminated water pumped by this process is transferred to a sewage treatment plant or a wastewater treatment facility and treated as described above.

In the above, the present invention has been described in detail with reference to preferred embodiments, but the present invention is not limited to the above embodiments, and various modifications may be provided within the scope of the present invention.

10... pretreatment tank 11... inlet
111... inlet part 112... 1st rectifying plate
113... 2nd commutation plate 114... Support leg
115... through hole 12... swash plate
121... 1st inclined part 122.. 2nd inclined part
13... Inlet pipe 131... Tapered part
20... Filtration tank 21... Filter material receiving part
211... perforated plate 31... protrusion
32... Groove part 40... Filter material cleaning part
41...Rotating member 411...Impeller
412...Rotary shaft 42...Motor
43... Main wing part 44... Vortex forming part
45... protrusion 46... vortex formation hole
50... Air injection part 51... Main piping
52... Connection piping 53... Branch piping
531... ejection hole 60... staying tank
100... non-point source treatment device

Claims (12)

A pretreatment tank including an inlet through which contaminated water washed in rainwater flows into, and a swash plate for inducing the precipitation of contaminants by changing a flow path of the contaminated water;
Including; a filter medium receiving unit including a filter medium for filtering the contaminated water introduced from the pretreatment tank, and a filter tank having an outlet through which the contaminated water passes through the filter medium receiving unit and is discharged;
The inlet portion may include an inlet tube portion in which upper and lower portions are opened; First and second rectifying plates having a plurality of through-holes through which contaminated water passes, and spaced apart from each other in the inflow tube part in the vertical direction; And a support leg for supporting the inflow tube part by being spaced apart from the bottom surface,
The inclined plate includes a first inclined portion disposed obliquely extending in a first direction, and a second inclined portion disposed obliquely extending in a second direction intersecting while having a predetermined angle with the first direction,
A plurality of the swash plates are provided inside the pretreatment tank, and the contaminated water can move along the space between the swash plates spaced apart from each other, and each of the swash plates is repeated with a protrusion disposed spaced apart from each other and a groove provided between the protrusions. Is formed, the first inclined portion and the second inclined portion are formed to form an angle of 110° or more to 130° or less when viewed from the side,
The inlet tube portion is provided on one side of the pretreatment tank, and the plurality of inclined plates are continuously arranged at predetermined intervals from a point spaced apart from the outer surface of the inlet tube portion by a predetermined distance,
A rotating member including an impeller disposed in the filter medium receiving portion and a rotating shaft having a polygonal cross-section extending from the impeller; And a filter material washing unit comprising a; and a motor providing power to the rotating member,
The impeller includes a plurality of blades, and each blade includes a main blade portion coupled to the rotation shaft, and a serrated vortex forming portion coupled to a lower end portion of the main blade portion,
The impeller has a protrusion protruding from the surface of each wing,
At least one vortex forming hole is formed on the surface of each wing. delete delete delete delete delete delete delete delete The method of claim 1,
An apparatus for treating non-point pollution sources, characterized in that an air injection part for washing the filter medium is provided below the filter medium receiving part. The method of claim 1,
An inlet pipe for guiding the contaminated water to the inlet is provided,
An end of the inlet pipe through which the contaminated water is discharged is tapered outward to have a diameter larger than that of the inlet pipe. The method of claim 1,
The pretreatment tank comprises a retention tank in which the contaminated water passing through the swash plate is retained before flowing into the filtration tank.

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