KR102398637B1 - Compact type non-point pollution reduction facility with automatic operation system - Google Patents

Abstract

Disclosed is a compact type nonpoint pollution reduction facility equipped with an automatic operation system, which is capable of being properly used for initial purification of nonpoint pollution sources. According to the present invention, the compact type nonpoint pollution reduction facility comprises: a precipitation tank for precipitating contaminants in introduced rainwater outflow; and a filtration tank for filtering primary treated water provided from the precipitation tank in an up-flow filtration method. The precipitation tank includes: a baffle wall temporarily storing rainwater outflow introduced from an inlet and allowing the stored rainwater outflow to have a predetermined residence period of time in the precipitation tank; and a column-shaped screen installed adjacent to a partition wall between the precipitation tank and the filtration tank in order to move the primary treated water precipitated in the precipitation tank to the filtration tank. The filtration tank includes: a filter media layer spaced apart from an inner bottom surface of the filtration tank at a predetermined interval; a backwash air pipe buried inside the filter media layer to generate air bubbles for cleaning the filter media; a lower perforated plate installed on a lower supporter to support the filter media layer from the lower part; and an upper perforated plate installed on an upper supporter and spaced upward apart from the filter media layer by a predetermined distance.

Description

Compact non-point pollution reduction facility with automatic operation system {COMPACT TYPE NON-POINT POLLUTION REDUCTION FACILITY WITH AUTOMATIC OPERATION SYSTEM}

The present invention relates to a non-point pollution reduction facility used for initial purification of a non-point pollution source.

Pollution sources that pollute the environment can be broadly classified into point sources with a clear discharge point and non-point sources with fluid and unclear discharge points. A point source refers to a source that discharges pollutants to a certain point through a conduit or waterway, such as a wastewater discharge facility, sewage generation facility, or livestock house. It refers to a source that discharges pollutants irregularly in an unspecified place.

In general, point source pollutants are easy to collect because the discharge route of pollutants is clear. Therefore, the design and maintenance of a pipe or treatment facility can be relatively easy for a point source. On the other hand, non-point source pollutants have a lot of difficulties in managing them because the discharge route of pollutants is not clear. Accordingly, in the current "Water Environment Conservation Act", non-point pollution sources are reported to businesses that develop more than a certain size, industrial complexes, and other non-point pollution sources, and the installation of non-point pollution reduction facilities is mandatory. .

Various technologies have been developed for non-point pollution abatement facilities so far. As an example, Patent Registration No. 10-0987316 discloses "a non-point pollutant treatment apparatus and purification method of a combined oil-water separation and upward filtration method". The above registered patent is configured to effectively separate and collect oil components from rainwater flowing in from a rainwater pipe, and effectively treat suspended matter through upward filtration in the next treatment tank. As another example, Patent Registration No. 10-0991492 discloses "a natural initial rainwater purification apparatus and purification method through multi-stage treatment". The above registered patent is configured to install a separation facility for early rainwater with a high degree of pollution, collect and filter the entire amount of rainwater with a high degree of pollution through multi-stage treatment, thereby improving purification performance and lifespan.

However, up to now, non-point pollution abatement facilities have many problems, and accordingly, research and development of more improved non-point pollution reduction facilities continues.

Registered Patent No. 10-0987316 (registered on October 6, 2010) Registered Patent No. 10-0991492 (registered on October 27, 2010)

Embodiments of the present invention are intended to provide a non-point pollution reduction facility that can be appropriately used for initial purification of non-point pollution sources.

In addition, embodiments of the present invention are intended to provide a non-point pollution reduction facility in which the sedimentation tank and the filtration tank are integrated.

In addition, embodiments of the present invention are intended to provide a non-point pollution reduction facility that can minimize the increase in manufacturing or installation costs, and strengthen the responsiveness to water quality fluctuations to properly maintain the performance of the facility for a long period of time.

However, the technical problems to be achieved by the embodiments of the present invention are not necessarily limited to the technical problems mentioned above. Other technical problems not mentioned will be clearly understood by those of ordinary skill in the art to which embodiments of the present invention belong from other descriptions of the specification, such as detailed description.

According to one aspect of the present invention, a sedimentation tank for precipitating pollutants in the introduced rainwater runoff; and a filtration tank for filtering the primary treated water provided from the settling tank by an upflow filtration method, wherein the settling tank temporarily stores stormwater effluent flowing in from the inlet, and the stored stormwater effluent is predetermined in the settling tank. a guiding wall to have a residence time; and a column-type screen installed adjacent to a partition wall between the settling tank and the filtration tank to flow the primary treated water precipitated in the settling tank to the filtration tank. Media layers spaced apart from each other; a backwash pipe that is installed inside the filter media layer to generate bubbles for washing the filter media; a lower perforated plate installed on the lower support to support the filter media layer from the lower part; and an upper perforated plate seated and installed on the upper pedestal, the upper perforated plate being spaced apart from the upper side of the filter media layer by a predetermined interval; a non-point pollution reduction facility including a can be provided.

The non-point pollution reduction facility according to the embodiments of the present invention has a structure in which the sedimentation tank and the filtration tank are integrated, so that a more compact facility can be realized, and the manufacturing and installation costs can also be reduced by significantly reducing the size.

In addition, the non-point pollution reduction facility according to the embodiments of the present invention can respond flexibly to changes in environmental conditions by strengthening the ability to respond to changes in water quality through the height adjustment function of the filter media layer.

In addition, the non-point pollution reduction facility according to the embodiments of the present invention secures sufficient flow space of the filter media layer during backwashing to more reliably remove the contaminants contained in the filter media layer, and the pollutants detached from the filter media layer are removed from the lower transfer It may be properly discharged to the outside of the filtration tank through the backwash water discharge door. Here, the lower transfer port forms the same plane as the bottom surface of the filtration tank or the settling tank to facilitate the discharge of pollutants, and the backwash water discharge door can reduce malfunctions during opening and closing through the inclined structure.

However, the technical effects obtainable through the embodiments of the present invention are not necessarily limited to the above-mentioned effects. Other technical effects not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from other descriptions of the specification such as the detailed description.

1 is a schematic side view of a non-point pollution reduction facility according to an aspect of the present invention.
FIG. 2 is a top plan view of the non-point pollution reduction facility shown in FIG. 1 .
3 is a bottom plan view of the non-point pollution reduction facility shown in FIG. 1 .
FIG. 4 is an enlarged view of the columnar screen shown in FIG. 1 .
5 is an operation view of the backwash water discharge door shown in FIG.
6 is a modified example of the column-type screen shown in FIG.
7 is an enlarged view of the upper perforated plate shown in FIG.
8 is a modified example of the upper perforated plate shown in FIG.
9 is an enlarged view of the back pore pipe shown in FIG.
10A and 10B are operational diagrams of the non-point pollution control facility shown in FIG. 1 during rain.
11A and 11B are operational views during the backwashing process of the non-point pollution reduction facility shown in FIG. 1 .

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The following examples may be provided to more completely explain the present invention to those of ordinary skill in the art. However, the following examples are provided to help the understanding of the present invention, and the technical spirit of the present invention is not necessarily limited to the following examples. In addition, detailed descriptions of well-known components or obscure the technical gist of the present invention will be omitted.

1 is a schematic side view of a non-point pollution reduction facility according to an aspect of the present invention. FIG. 2 is a top plan view of the non-point pollution reduction facility shown in FIG. 1 . 3 is a bottom plan view of the non-point pollution reduction facility shown in FIG. 1 .

1 to 3 , the non-point pollution reduction facility 100 of this embodiment may include a settling tank 110 and a filtration tank 120 .

The sedimentation tank 110 may primarily treat contaminants in stormwater effluent. The settling tank 110 may be configured to precipitate and treat contaminants in stormwater effluent. The filtration tank 120 may secondary filtrate the primary treated water at the rear end of the settling tank 110 . The filtration tank 120 may filter contaminants in the primary treated water through the filter medium 121a.

The non-point pollution reduction facility 100 of this embodiment may have one feature in that the settling tank 110 and the filtration tank 120 are integrally formed.

The settling tank 110 and the filtration tank 120 may share a single structure, and the internal space of the structure is partitioned by the partition wall 130 , so that the settling tank 110 and the filtration tank 120 may be formed. This type of non-point pollution reduction facility 100 can have an advantage in terms of cost or maintenance by reducing the installation space. On the other hand, filtration or backwashing performance due to space constraints can be ensured by the characteristic configurations of the present embodiment, which will be described later.

Hereinafter, detailed configurations related to the settling tank 110 will be described.

The settling tank 110 of this embodiment may form a predetermined internal space. The settling tank 110 is for primary treatment of relatively large contaminants, and as illustrated, generally forms an internal space of a smaller size than the filtration tank 120 . However, the present invention is not necessarily limited thereto, and the size and ratio of the settling tank 110 may be appropriately adjusted according to the characteristics of the treated water or the use environment.

In the internal space of the settling tank 110 , the introduced rainwater runoff may be temporarily stored. Contaminants in the rainwater effluent may be partially precipitated and separated while staying in the settling tank 110 . Appropriate components for precipitation of contaminants, etc. may be disposed inside the settling tank 110 .

An inlet 111 may be provided at one side of the settling tank 110 . As illustrated, the inlet 111 is disposed at the upper end of the side wall of the settling tank 110 . The inlet 111 is formed through the settling tank 110 to introduce rainwater runoff into the settling tank 110 .

A guide wall 112 may be provided inside the settling tank 110 . The guiding wall 112 may extend to a predetermined height inside the settling tank 110 to partition the internal space of the settling tank 110 . Specifically, the guiding wall 112 may divide the internal space of the settling tank 110 into a first space S1 and a second space S2 . The first space S1 may be disposed adjacent to the inlet 111 to temporarily store rainwater runoff supplied from the inlet 111 . Rainwater runoff stored in the first space S1 may flow to the second space S2 along the guiding wall 112 .

A guide wall support 112a may be installed on the guide wall 112 . The guiding wall support 112a may be installed between the upper end of the guiding wall 112 and the inner wall of the settling tank 110 to support the guiding wall 112 . The guiding wall support 112a can prevent the guiding wall 112 from being damaged or deformed due to continuous water pressure by the treated water. If necessary, a plurality of guide wall supports 112a may be provided to be disposed in the transverse or longitudinal direction along the guide wall 112 .

A stagnant water drainage pump 113 and a stagnant water discharge pipe 113a may be provided in the second space S2 inside the settling tank 110 . The stagnant water drainage pump 113 is disposed adjacent to the bottom of the second space S2 to pressurize and transfer the treated water stagnant in the second space S2 to the stagnant water discharge pipe 113a. The stagnant water discharge pipe 113a is connected to the outlet of the stagnant water drainage pump 113 , and the treated water provided from the stagnant water drainage pump 113 can be transported upward and discharged.

An upper portion of the settling tank 110 may be provided with a settling tank check hole 114 . The settling tank inspection port 114 may provide a passage through which an operator or the like can access for internal inspection of the settling tank 110 .

A column type screen 115 may be provided in the second space S2 inside the settling tank 110 . The columnar screen 115 may be disposed adjacent to the partition wall 130 . The columnar screen 115 may provide a transport path through which the primary treated water in the second space S2 may flow to the filtration tank 120 .

The non-point pollution reduction facility 100 of this embodiment may have one characteristic in the configuration of the column-type screen 115 as described above. This will be described in detail with reference to FIG. 4, which will be described later.

A lower transfer port 131 may be formed in the partition wall 130 dividing the settling tank 110 and the filtration tank 120 . The lower transfer port 131 may be formed through the lower end of the partition wall 130 in the transverse direction to form a passage between the settling tank 110 and the filtration tank 120 . The primary treated water introduced into the columnar screen 115 may be provided to the filtration tank 120 through the lower transfer port 131 at the lower end of the columnar screen 115 .

Preferably, the lower transfer port 131 may be formed through the settling tank 110 and the filtration tank 120 in the transverse direction to form the same plane as the inner bottom surfaces of the settling tank 110 and the filtration tank 120 . This is in consideration of the smooth transfer and discharge of contaminants during operation in the backwashing mode, which will be described later. This will be described in detail with reference to FIG. 10, which will be described later.

Hereinafter, detailed configurations related to the filtration tank 120 will be described.

Similar to the settling tank 110 described above, the filtration tank 120 may form a predetermined internal space. In the interior of the filtration tank 120, the primary treated water introduced from the settling tank 110 may be stored and filtered. The primary treated water may be introduced into the filtration tank 120 through the lower transfer port 131 . In the case of the sedimentation tank 110, contaminants are precipitated and removed, whereas in the filtration tank 120, the contaminants can be removed by filtration through the filter medium 121a.

A filter media layer 121 may be provided inside the filtration tank 120 . The filter media layer 121 may be disposed to be spaced apart from the inner bottom surface of the filtration tank 120 by a predetermined distance. The filter media layer 121 may be generally disposed above the area (height) in which the lower transfer port 131 is formed. This is in order not to interfere with the flow of treated water through the lower transfer port 131 .

The filter media layer 121 may include a plurality of filter media 121a. That is, the filter media layer 121 may be formed through a plurality of filter media 121a filled in a predetermined area inside the settling tank 110 . The filter medium 121a may be formed of a fibrous filter material containing polyester as a material. In addition, the filter medium 121a may be formed in a substantially spherical shape. In one embodiment, the filter medium 121a may have a diameter of about 20 to 25 mm. However, in this embodiment, the material or shape of the filter medium 121a is not particularly limited. The filter medium 121a may include a filter medium of various known materials or shapes.

The filter medium 121a may have a specific gravity higher than that of water. Accordingly, the filter medium 121a may be immersed in the treated water to maintain a predetermined filter medium layer 121 . However, since the non-point pollution reduction facility 100 of this embodiment discharges and removes the collected contaminants by partially floating the filter medium layer 121 as will be described later, it is not preferable that the filter medium 121a has an excessively high specific gravity. Accordingly, the filter medium 121a may have a specific gravity of 1.2 to 1.5, and more preferably, a specific gravity of 1.3 to 1.4. When the filter medium 121a has a specific gravity of 1.2 or less, it may be difficult to maintain an appropriate immersion state in the treated water, and when the filter medium 121a has a specific gravity of 1.5 or more, floating and washing effects of the filter medium 121a may be reduced.

Meanwhile, an upper perforated plate 122 and a lower perforated plate 123 for accommodating the filter media layer 121 may be provided inside the settling tank 110 . The upper perforated plate 122 and the lower perforated plate 123 may be vertically spaced apart by a predetermined interval to form an accommodation space for accommodating the filter media layer 121 .

A plurality of upper perforated plate 122 and lower perforated plate 123 may be provided, respectively, depending on the area of the filtration tank 120 . The plurality of upper perforated plates 122 may be combined in the transverse direction to form one transverse support surface on the upper portion of the filter media layer 121 . Similarly, the plurality of lower perforated plates 123 may compete in the transverse direction to form one transverse support surface under the filter media layer 121 .

The upper perforated plate 122 may be supported by being seated on the upper support 124 disposed on the filter media layer 121 . The upper support 124 has the shape of a bar extending in the longitudinal direction, and may be disposed in the filtration tank 120 in the transverse direction. A plurality of upper supports 124 may be provided according to the size or number of the upper perforated plate 122 . However, as long as the upper support 124 can properly support or position the upper perforated plate 122 from the lower part, it is not necessarily limited to the shape of the illustrated bar.

In the above, the upper perforated plate 122 of this embodiment has one feature in that the position in the downward direction is regulated by the upper support 124, but is not fixed upward.

That is, the upper perforated plate 122 may be immersed in the treated water by its own weight, and may be disposed to be seated on the upper support 124 . Also, as shown in FIG. 1 , in a general operating state, the upper perforated plate 122 may be disposed to be vertically spaced apart from the filter media layer 121 by a predetermined distance. This is to supplement the filter medium 121a or to consider the cleaning of the filter medium layer 121 . This will be described in detail with reference to FIG. 7, which will be described later.

Similar to the upper perforated plate 122 , the lower perforated plate 123 may be supported by being seated on the lower support 125 disposed under the filter media layer 121 . The lower support 125 may have a shape of a bar arranged in a transverse direction inside the filtration tank 120 , and may be provided in plurality.

The lower perforated plate 123 may be disposed to be seated on the lower support 125 . Alternatively, different from the above-described upper perforated plate 122 , the lower perforated plate 123 may be fixedly installed on the lower support 125 . However, in general, since the lower perforated plate 123 is pressed downward by the filter media layer 121, in any case, the lower perforated plate 123 can be generally maintained in a fixed position.

On the other hand, a back pore pipe 126 may be provided under the filter media layer 121 . The backwash air pipe 126 may discharge air to desorb contaminants from the filter medium 121a during backwashing.

Here, the back pore pipe 126 of the present embodiment has one feature in that it is disposed inside the filter media layer 121 .

That is, the back pore pipe 126 may be disposed above the lower perforated plate 123 to be buried in the filter media layer 121 . The back-fine air pipe 126 may discharge air for desorption of contaminants from the inside of the filter medium layer 121 .

The arrangement of the backwash pipe 126 as described above directly discharges air into the filter media layer 121 to increase the desorption effect of contaminants. In addition, since the back pore pipe 126 is buried inside the filter media layer 121 , it is possible to partially prevent the back pore pipe 126 from being blocked by contaminants falling from the filter media layer 121 .

In other words, in the general case of the related art, the back pore pipe is disposed at a position spaced downward from the filter media layer at a predetermined interval. In this case, the air discharged from the backwash pipe may not properly penetrate the inside of the filter media layer, but may be supplied only to the outer surface of the filter media layer. In addition, there is a problem in that contaminants are separated from the filter media layer and are directly stacked on the backwash pipe. In this case, the contaminants block the discharge hole of the backwash pipe, so that the backwash air cannot be properly discharged, and there may be a problem that the cleaning effect is lowered during backwashing.

In the non-point pollution reduction facility 100 of this embodiment, the back pore pipe 126 is disposed inside the filter media layer 121, and the discharge port 126c of the back pore pipe 126 as will be described later is designed through the above problem. can be largely solved. That is, the air discharged from the backwash air pipe 126 can effectively penetrate the inside of the filter media layer 121 to improve the desorption effect of contaminants, and the clogging of the backwash pipe 126 due to the desorbed contaminants can also be minimized. can This will be described in detail with reference to FIG. 9 .

A blower 127 may be provided outside the filtration tank 120 . The blower 127 supplies air for backwashing to the backwash pipe 126 through the backwash air supply pipe 127a, and the supplied air can be discharged from the inside of the filtration tank 120 through the backwash pipe 126. there is.

An outlet 128 may be provided at one side of the filtration tank 120 . The outlet 128 may be disposed on the upper side of the filter media layer 121 to discharge the treated water passing through the filter media layer 121 to the outside of the facility.

A filter tank check hole 129a may be provided at the upper portion of the filtration tank 120 . The filter tank inspection port 129a may provide a passage through which a worker or the like can access for internal inspection of the filter tank 120 .

In addition, a control panel 129b may be provided outside the filtration tank 120 . The control panel 129b may control the non-point pollution reduction facility 100 as a whole, and display information such as the water level and the operating state of the settling tank 110 or the filtration tank 120 . If necessary, the control panel 129b may have an automatic operation function and the non-point pollution reduction facility 100 may be configured to be able to be automatically controlled unmanned. In addition, the control panel 129b may be configured to wirelessly communicate with the user terminal so that the control or information display can be performed through the user terminal.

FIG. 4 is an enlarged view of the columnar screen shown in FIG. 1 . Fig. 4(a) is a schematic front view of a columnar screen, Fig. 4(b) is a schematic rear view of the columnar screen, and Fig. 4(c) is a schematic side view of the columnar screen.

Referring to FIG. 4 , the columnar screen 115 may be formed in the form of a column having an internal space. A predetermined area perforated column 115a may be provided at the upper end of the columnar screen 115 . The perforated column 115a may introduce the primary treated water inside the settling tank 110 into the columnar screen 115 .

In order to introduce the primary treated water as described above, a plurality of first holes 115b may be formed through the perforated column 115a. The first hole 115b may be disposed with a predetermined interval over the entire area of the perforated column 115a. Also, the first hole 115b may have a first diameter. In one embodiment, the first hole 115b may have a diameter of 20 to 30 mm. The first hole 115b may be formed to be larger than the third hole 122b formed in the upper perforated plate 122 or the lower perforated plate 123, which will be described later.

A backwash water outlet 115c may be formed on one side of the lower end of the columnar screen 115 . A backwash water inlet 115d may be formed on the opposite side corresponding to this. The backwash water outlet 115c may be disposed toward the inside of the settling tank 110 , and the backwash water inlet 115d may be disposed toward the filtration tank 120 or the lower transfer port 131 . Preferably, the backwash water inlet 115d may be disposed at a position corresponding to the lower transfer port 131 . This is to allow the washing water provided through the lower transfer port 131 to smoothly flow into the backwash water inlet 115d during backwashing.

In addition, the columnar screen 115 may include a backwash water discharge door 115e that opens and closes the backwash water discharge port 115c. The backwash water discharge door 115e may have an upper end hinge-coupled to the outer surface of the columnar screen 115, and may be rotated about the hinge to open or close the backwash water discharge port 115c.

Here, the backwash water discharge door 115e of this embodiment is disposed to be inclined at a predetermined angle toward the inside of the settling tank 110 in a closed state, and has one feature.

Specifically, at the lower end of the columnar screen 115, a lower inclined surface 115f inclined downward toward the inside of the settling tank 110 may be provided. The lower inclined surface 115f may extend at an angle of approximately 50 to 70 degrees with the floor surface. The backwash water outlet 115c may be formed through the lower inclined surface 115f, and the backwash water outlet door 115e may be seated and disposed on the lower inclined surface 115f in a hinged upper end. Accordingly, the backwash water discharge door 115e may be inclined to have a predetermined angle corresponding to the lower inclined surface 115f in the closed state.

5 is an operation view of the backwash water discharge door shown in FIG.

Figure 5 (a) shows the operating state during a typical filtration operation. In this case, the rainwater runoff is retained in the settling tank 110, and the backwash water outlet door 115e can be kept closed according to the water pressure P1 of the rainwater runoff. Therefore, the primary treated water inside the settling tank 110 may be introduced into the columnar screen 115 through the perforated column 115a at the top of the columnar screen 115 . In addition, the primary treated water introduced into the columnar screen 115 may be supplied to the filtration tank 120 through the backwash water inlet 115d and the lower transfer port 131 at the bottom of the columnar screen 115 .

In the operating state as described above, the lower inclined surface 115f or the backwash water discharge door 115e slanted to correspond thereto can properly maintain the closed state through the hydraulic pressure P1 of the rainwater runoff. That is, as the backwash water discharge door 115e is inclined, the water pressure P1 inside the settling tank 110 presses the backwash water discharge door 115e in the closing direction, thereby causing the backwash water discharge door 115e. is in close contact with the lower inclined surface 115f and can be maintained in a more completely closed state.

To elaborate on the above, a more generally conceivable way of disposing the backwash water discharge door is in the vertical direction. That is, the column-type screen is formed in the form of a column extending in the vertical direction, and a hinged opening-and-closing type backwash water discharge door arranged in the vertical direction is added to the lower end thereof. However, in this case, unlike the above-described embodiment, the water pressure inside the settling tank does not act directly on the backwash water discharge door, so it is difficult to maintain a solid closed state.

The backwash water discharge door 115e of this embodiment is disposed to be inclined downward in the closed state through the lower inclined surface 115f, so that the water pressure P1 can be used more effectively and a more rigid closed state can be maintained.

On the other hand, the lower inclined surface 115f may have a function of transporting and guiding the contaminants settling through the backwash water discharge door 115e to the lower side. That is, the contaminants settling from the upper part may be deposited (P2) on the bottom surface in front of the lower inclined surface 115f while flowing and guided by the lower inclined surface 115f. This is also related to the opening operation of the backwash water discharge door 115e, which will be described later.

5 (b) shows a state in which the backwash water discharge door 115e is opened. The backwash water discharge door 115e may be properly opened in the backwash mode to introduce foreign substances, etc. separated from the filter media layer 121 into the settling tank 110 .

Specifically, when a flow flow from the filtration tank 120 toward the settling tank 110 is created by the stagnant water drainage pump 113, the backwash water discharge door 115e rotates around the hinge in the closed state described above, and the backwash water The outlet 115c may be opened. Accordingly, the washing water inside the filtration tank 120 may be introduced into the settling tank 110 through the lower transfer port 131 , the backwash water inlet 115d and the backwash water outlet 115c . Here, the lower conveying port 131 to the backwashing water outlet 115c of the present embodiment are disposed at positions corresponding to each other along the bottom surface, so that the washing water can flow more smoothly into the settling tank 110 .

In addition, since the backwash water discharge door 115e is inclined in the above, it is possible to prevent the door closing phenomenon due to the deposit P2. That is, as shown in FIG. 4 (a), the sediment P2 is guided forward by the lower inclined surface 115f to be deposited, and the backwash water discharge door 115e is rotated upward from the initial state in which it is inclined and is opened. As a result, the opening of the backwash water discharge door 115e is not limited due to the sediment P2, and a smooth opening operation can be achieved. In addition, the sediment P2 deposited in the front can be properly removed according to the flow of the washing water.

To elaborate on the above, when the backwash water discharge door is arranged in the vertical direction, the sediment inside the settling tank is directly stacked at the lower end of the backwash water discharge door. Accordingly, the stacked sediment limits the opening of the backwash water discharge door, and accordingly, the backwash water discharge door may not be properly opened.

The backwash water discharge door 115e of this embodiment induces the sediment P2 to be stacked in front of the backwash water discharge door 115e through the lower inclined surface 115f, and the rotational trajectory of the backwash water discharge door 115e being opened. By changing the , it is possible to effectively solve the above problems.

6 is a modified example of the column-type screen shown in FIG.

Referring to FIG. 6 , the columnar screen 215 of this modified example may include a perforated column 215a in a detachable form. Specifically, the perforated column 215a of the present modification may be formed in the form of a duct with upper and lower sides developed. A first hole 215b and a second hole 215c may be formed on a side surface of the perforated column 215a. A plurality of first holes 215b may be formed, and may be disposed in one area based on the center line L1 of the perforated column 215a. A plurality of second holes 215c may be formed, and may be disposed in an area opposite to the center line L1 of the perforated column 215a to correspond to the second hole 215c. A rib 215d for regulating the vertical position of the perforated column 215a may be formed on the inner circumferential surface of the perforated column 215a corresponding to the center line L1. In addition, an appropriate sealing structure or packing may be added to the upper and lower surfaces of the ribs 215d as needed.

In the above, the first hole 215b and the second hole 215c may have different diameters. For example, the first hole 215b may have a smaller diameter than the second hole 215c. Accordingly, a plurality of first holes 215b having a predetermined diameter may be penetrated in one region of the perforated column 215a, and a plurality of second holes 215c having a larger diameter may be penetrated in an opposite region.

The perforated column 215a of this modification is characterized in that the hole size of the perforated column 215a can be varied according to the driving environment, etc.

That is, as shown in (a) of FIG. 6 , the perforated column 215a may be inserted into the upper end of the columnar screen 215 so that the first hole 215b is disposed on the upper side. In this case, the primary treated water is introduced into the column-type screen 215 through the first hole 215b, and can be treated secondary.

Alternatively, as shown in (b) of FIG. 6 , the perforated column 215a may be used by inserting the upper end of the columnar screen 215 so that the second hole 215c is disposed on the upper side. In this case, the primary treated water may be introduced into the columnar screen 215 through the second hole 215c. As illustrated, when the second hole 215c has a larger diameter than that of the first hole 215b, the perforated column 215a can introduce foreign substances having a larger size than that of the above-described operation example into the columnar screen 215. can Therefore, the user can select and use an appropriate filtration degree of the first hole 215b or the second hole 215c according to the driving environment.

7 is an enlarged view of the upper perforated plate shown in FIG. Fig. 7 (a) is a schematic side view showing a state in which the upper perforated plate is combined, Fig. 7 (b) is a schematic plan view of the upper perforated plate, and Fig. 7 (c) shows a schematic side view of the upper perforated plate.

The configuration of the upper perforated plate 122 to be described below may be similarly applied to the lower perforated plate 123 .

Referring to FIG. 7 , the upper perforated plate 122 may be formed in the shape of a square plate having a predetermined width in the front-rear direction and the left-right direction, respectively. If necessary, a plurality of upper perforated plates 122 may be provided, and a plurality of upper perforated plates 122 may be connected to each other to form a single plane. For reference, referring to FIG. 1 , in this embodiment, eight upper perforated plates 122 are connected and installed.

If necessary, a pair of adjacent upper perforated plates 122 may be coupled to each other through a hinge portion 122a. In this embodiment, a pair of upper perforated plates 122 are disposed adjacent to each other on the left and right, and a pair of adjacent upper perforated plates 122 are hinged to each other by a hinge portion 122a having a hinge axis in the front-rear direction. are doing In this case, the plurality of upper perforated plates 122 arranged on the left and right may be rotated to a predetermined degree about the hinge portion 122a so that the arrangement shape thereof may be varied. This will be amplified in relation to the movement of the upper perforated plate 122 during the backwashing operation.

A plurality of third holes 122b may be formed through the upper perforated plate 122 . The third hole 122b is for the inflow and outflow of treated water, and may be disposed at a predetermined interval over the entire area of the upper perforated plate 122 . Also, the third hole 122b may have a third diameter. The third hole 122b may be formed to be smaller than the first hole 115b of the above-described columnar screen 115 by a predetermined degree. In one embodiment, the third hole 122b may have a diameter of 5 to 15 mm.

The upper perforated plate 122 may have side-cut bent portions 122c at both ends. The side bent portion 122c is a vertical bent portion 122d bent downward from the main surface of the upper perforated plate 122, and the lower end of the vertical bent portion 122d toward the center of the upper perforated plate 122 again. It may be made of a bent horizontal bent portion (122e). The side bending portion 122c can secure the structural rigidity of the upper perforated plate 122 and prevent deformation. In addition, the side bending portion 122c allows the main surface of the upper perforated plate 122 to be spaced apart from the upper support 124 to prevent deformation or damage of the third hole 122b by the upper support 124 .

A center reinforcing bar 122f may be provided in the center of the upper perforated plate 122 . The center reinforcing bar (122f) has a predetermined cross-sectional shape, and may be formed to extend back and forth from the center of the upper perforated plate (122). The center reinforcing bar 122f of this embodiment is exemplified in a substantially square pipe shape. The center reinforcing bar 122f may contribute to securing the structural rigidity of the upper perforated plate 122 together with the side bent portion 122c.

In addition, in this embodiment, the center reinforcing bar (122f) may have a function of securing an appropriate weight of the upper perforated plate (122). That is, the upper perforated plate 122 of this embodiment is lowered in a state supported by the upper support 124 during the filtering operation, and is separated from the upper support 124 during the backwashing operation and may be raised to a predetermined degree. Therefore, the upper perforated plate 122 must have a predetermined weight so that the lowering or ascending operation can be properly performed. This weight control can be achieved through the design of the center reinforcing bar (122f).

For reference, in the conventional case, the upper perforated plate is installed in a fixed structure inside the filtration tank. On the other hand, the upper perforated plate 122 of this embodiment is not a fixed structure, but has a structure that is seated and disposed on the upper support 124, which enables a more efficient operation state to be implemented through a volume change according to each operation state. . This will be described in detail with reference to FIG. 10 .

8 is a modified example of the upper perforated plate shown in FIG.

Referring to FIG. 8 , the upper perforated plate 222 according to this modified example may be implemented in a form in which the center reinforcing bar 222f is detachable.

Specifically, on the bottom surface of the upper perforated plate 222, a reinforcing bar insertion rib (222g) to which the center reinforcing bar (222f) can be inserted and fastened may be formed, and the center reinforcing bar (222f) is such a reinforcing bar insertion rib (222g) It can be inserted and fastened by sliding into the Therefore, the user can separate the center reinforcing bar (222f) from the reinforcing bar insertion rib (222g) to the upper perforated plate (222) as needed.

In the above, the center reinforcing bar (222f) may be provided with a plurality of types (222g-1 ~ 222g-3). The center reinforcing bar (222f) according to each type has different wall thicknesses (d1 to d3) while maintaining the outer diameter, and may have different weights, respectively. In this case, the user can adjust the weight of the upper perforated plate 222 by selecting a suitable center reinforcing bar 222f according to the operating environment and fastening it to the upper perforated plate 222 .

Meanwhile, in this modified example, an auxiliary support 222h may be provided on the upper side of the upper perforated plate 222 . The auxiliary support (222h) is generally in the form of a bar extending in the longitudinal direction similar to the upper support (124), may be disposed in the transverse direction in the filtration tank 120, a plurality may be provided. In addition, the auxiliary support (222h) may be spaced apart from the upper side of the upper support (124) by a predetermined interval. Accordingly, a predetermined clearance space in which the upper perforated plate 222 can flow may be formed between the upper support 124 and the auxiliary support 222h. In addition, the upper perforated plate 222 may be moved between the upper support 124 and the auxiliary support (222h) depending on the operating state.

Figure 8 (b) shows a case in which the upper perforated plate 222 is lowered and seated on the upper support 124 . Fig. 8 (b) shows an operating state during a typical filtration operation. In this case, the upper perforated plate 222 is spaced apart from the lower perforated plate 123 by a predetermined interval, and the filtration of the treated water may be performed through the filter media layer 121 disposed in the space therebetween.

Figure 8 (c) shows a case in which the upper perforated plate 222 is raised and lowered in the state of (b) described above and disposed adjacent to the auxiliary support (222h). 8C shows one of the operating states during the backwashing operation. In this case, the upper perforated plate 222 may be moved upward to a predetermined degree by the pressure (bubbles) discharged from the back pore pipe 126 . The auxiliary support (222h) may have a function of appropriately regulating the rise of the upper perforated plate (222). That is, the auxiliary pedestal 222h may regulate the upper perforated plate 222 to rise only to a preset appropriate position during the backwashing operation.

9 is an enlarged view of the back pore pipe shown in FIG. Fig. 9 (a) is a schematic plan view of a back pore pipe, and Fig. 9 (b) is a schematic cross-sectional view of a branch pipe.

Referring to FIGS. 9A and 9B , the back pore pipe 126 may include a main channel 126a and a branch pipe 126b. The main passage 126a may be formed to extend in the left and right directions inside the filtration tank 120 , and may be connected to the external blower 127 . The branch pipe 126b may be formed to extend in the front-rear direction from the main channel 126a. The branch pipe 126b may generally have a diameter smaller than that of the main channel 126a by a predetermined degree. In addition, a plurality of branch pipes 126b may be provided to be spaced apart from each other at predetermined intervals along the main passage 126a.

A discharge port 126c may be formed in the branch pipe 126b. A plurality of discharge ports 126c may be provided along the longitudinal direction of the branch pipe 126b. The discharge port 126c may spray the cleaning air flowing along the main channel 126a and the branch pipe 126b to the external filter media layer 121 . Preferably, the discharge port 126c may be disposed in the lower region of the branch pipe 126b, and a pair may be provided on the left and right around the center of the branch pipe 126b as shown in FIG. there is. In one embodiment, the discharge port 126c may be disposed to form approximately 45 degrees with respect to the vertical direction.

The arrangement of the discharge port 126c as described above is due to the branch pipe 126b of the present embodiment being arranged inside the filter media layer 121 . That is, as the discharge port 126c is formed in the lower region of the branch pipe 126b, despite the branch pipe 126b being disposed inside the filter medium layer 121, the discharge port ( 126c) clogging can be prevented.

If necessary, the branch pipe 126b may include a plurality of branch pipe regions 126d to 126f along the longitudinal direction. In this case, discharge ports 126g to 126i having different sizes may be formed in each branch tube region 126d to 126f.

FIG. 9(c) shows an example in which each discharge port 126c is formed to have a different size as described above. As illustrated in FIG. 9C , the branch pipe 126b may include first to third branch pipe regions 126d to 126f partitioned along the longitudinal direction. Here, a first outlet 126g may be formed in the first branch tube region 126d, and the first outlet 126g may have a first diameter. Also, a second discharge port 126h may be formed in the second branch tube region 126e, and the second discharge port 126h may have a second diameter. Here, the second diameter may be formed to be larger than the first diameter by a predetermined degree. For example, the second diameter may be formed to be 10 to 20% larger than the first diameter. Similarly, a third outlet 126i may be formed in the third branch tube region 126f, and the third outlet 126i may have a third diameter greater than the second diameter by a predetermined degree.

The backwash air pipe 126 as described above similarly adjusts the amount of air discharged along the longitudinal direction of the branch pipe 126b so that the filter media layer 121 can be properly cleaned over the entire longitudinal direction. In general, as the pressure decreases toward the end of the branch pipe 126b (the third branch pipe region 126f), the air is discharged non-uniformly. is to solve

Hereinafter, the operation of the non-point pollution reduction facility 100 as described above will be described.

10A and 10B are operational views of the non-point pollution reduction facility shown in FIG. 1 during rain.

Referring to (a) of FIG. 10A , the initial rainwater (treated water) may undergo a settling process for a predetermined time while being guided along the guiding wall 112 of the settling tank 110 .

Referring to (b) of FIG. 10A , thereafter, the primary treated water may be introduced into the upper portion of the columnar screen 115 . The introduced primary treated water may flow into the filtration tank 120 through the lower transfer port 131 . For reference, in operation during rain, the backwash water discharge door 115e may be closed by the water pressure inside the settling tank 110 , and the primary treated water movement between the settling tank 110 and the filtration tank 120 is a column-type screen 115 . can be done through

Referring to (c) of FIG. 10B , the primary treated water introduced into the filtration tank 120 may be filtered while passing through the filter media layer 121 upward. That is, the filtration tank 120 may be filtered through an upflow filter medium. In this process, contaminants in the treated water may be appropriately collected inside the pores formed by the filter medium 121a and on the surface of the filter medium. In addition, the filtered treated water may be discharged to the outside through the outlet 128 in the upper portion of the filtration tank (120).

11A and 11B are operational views during the backwashing process of the non-point pollution reduction facility shown in FIG. 1 .

On the other hand, when the rain ends, the backwashing mode may be performed if necessary. First, as shown in (a) of FIG. 11A , in a state where a predetermined water level is maintained, the stagnant water drainage pump 113 operates to partially discharge the stagnant water. Here, the stagnant water in the filtration tank 120 may be transferred to the settling tank 110 through the filtration tank 120 and the lower transfer port 131 disposed adjacent to the bottom surface of the settling tank 110 .

The lower transfer port 131 of this embodiment is disposed to correspond to the bottom surfaces of the filtration tank 120 and the settling tank 110, so that, despite various sediments in the stagnant water, the stagnant water can be drained more smoothly. In addition, in the process of draining the stagnant water, the sediment inside the filtration tank 120 may be appropriately transported and removed. This is also the case in the stage of discharging stagnant water, which will be described later.

Referring to FIG. 11A (b), in the initial state (a), drainage can be performed so that the boundary G1 corresponding to the upper end of the filter media layer 121 is lowered to a position corresponding to the lower end of the filter media layer 121. there is. That is, the water level may be adjusted through drainage so that the treated water (stagnant water) filtered through the filter media layer 121 completely accommodates the filter media layer 121 . This is to improve the washing efficiency by washing the filter media layer 131 with purified water that has already been filtered.

Thereafter, a backwashing process may be performed as shown in FIG. 11C . Specifically, air is discharged through the back pore pipe 126 , and the discharged air (bubbles) moves upward and passes through the inside of the filter media layer 121 . Contaminants remaining in the filter medium layer 121 may be separated from the filter medium 121a by these air bubbles and collected under the filter medium 120 .

In the above, while the filter medium 121a flows to a predetermined extent by air bubbles, contaminants may be desorbed. That is, the filter medium 121a may be removed from contaminants while flowing between the upper perforated plate 122 and the lower perforated plate 123 . The upper perforated plate 122 is spaced apart from the upper side of the filter medium layer 121 by a predetermined interval, and enables the flow of the filter medium 121a by air bubbles.

Furthermore, when the upper perforated plate 122 is made to be flowable as in the modified example of FIG. 8 , the upper perforated plate 122 may be moved more upward according to the flow of air bubbles or the filter medium 121a. That is, the upper perforated plate 122 is raised to a position corresponding to the auxiliary support 222h, so that the space through which the filter medium 121a can flow can be secured more widely. Accordingly, the interval between the filter media 121a is sufficiently spaced apart, so that desorption of contaminants can be performed more smoothly.

Meanwhile, thereafter, as shown in FIG. 11( d ), the internal stagnant water may be discharged. The stagnant water washes the filter media layer 121 and the like through the above-described process and contains a large amount of contaminants. The stagnant water may be discharged to the outside by the stagnant water drainage pump 113 . In addition, the stagnant water inside the filtration tank 120 may be transferred to the settling tank 110 through the lower transfer port 131 and the backwash water discharge door 115e together with the stacked foreign substances and discharged to the outside. Here, the stagnant water may be smoothly transferred from the filtration tank 120 to the settling tank 110 through the arrangement of the above-described lower transfer port 131 or the structure of the backwash water discharge door 115e.

As described above, the non-point pollution reduction facility 100 according to the embodiments of the present invention has an integrated structure in which the settling tank 110 and the filtration tank 120 are integrated, so that a more compact facility can be realized, and the size is significantly reduced. Manufacturing and installation costs can also be reduced.

In addition, the non-point pollution reduction facility 100 according to the embodiments of the present invention secures a sufficient flow space of the filter media layer 121 during backwashing to more reliably remove contaminants contained in the filter media layer 121, Contaminants desorbed from the filter media layer 121 may be properly discharged to the outside of the filtration tank 120 through the lower transfer port 131 to the backwash water discharge door 115e. Here, the lower transfer port 131 forms the same plane as the bottom surface of the filtration tank 120 to the settling tank 110 to facilitate the discharge of contaminants, and the backwash water discharge door 115e opens and closes through an inclined structure. It can reduce the malfunction of the city.

Although the embodiments of the present invention have been described above, those of ordinary skill in the art can add, change, delete or add components within the scope that does not depart from the technical spirit of the present invention described in the claims. It will be possible to variously modify or change the present invention by this, which will also be included in the scope of the present invention.

100: non-point pollution reduction facility 110: sedimentation tank
111: inlet 112: baffle wall
113: stagnant water drainage pump 114: sedimentation tank check port
115: column type screen 120: filtration tank
121: filter media layer 122: upper perforated plate
123: lower perforated plate 124: upper support
125: lower support 126: backwash pipe
127: blower 128: outlet
130: bulkhead 131: lower transfer port

Claims (6)

a sedimentation tank 110 for precipitating contaminants in the introduced rainwater runoff; and
Including a;
The settling tank 110,
a guiding wall 112 for temporarily storing rainwater runoff flowing in from the inlet 111 and allowing the stored rainwater runoff to have a predetermined residence time in the settling tank 110; and
A columnar screen 115 installed adjacent to the partition wall 130 between the settling tank 110 and the filtration tank 120 in order to flow the primary treated water precipitated in the settling tank 110 to the filtration tank 120 . including;
The filtration tank 120,
a filter media layer 121 spaced apart from the inner bottom surface of the filtration tank 120 by a predetermined distance;
a backwash air pipe 126 that is embedded in the filter medium layer 121 and generates air bubbles for cleaning the filter medium 121a;
a lower perforated plate 123 installed to be seated on the lower support 125 to support the filter media layer 121 from the lower part; and
Installed on the upper pedestal 124, the upper perforated plate 122 spaced apart from the upper side of the filter media layer 121 by a predetermined distance; including;
The columnar screen 115 is,
a backwash water inlet (115d) formed on the lower end surface of the filtration tank (120) to correspond to the lower transfer port (131) formed at the lower end of the partition wall (130);
a lower inclined surface (115f) extending downwardly from the opposite surface of the lower end of the columnar screen (115) toward the inside of the settling tank (110);
a backwash water outlet 115c formed on the lower inclined surface 115f to correspond to the backwash water inlet 115d; and
A non-point pollution reduction facility comprising a; delete The method according to claim 1,
The columnar screen 115 is,
It is provided at the upper end of the columnar screen 115 and includes a perforated column 215a for introducing the primary treated water of the settling tank 110 into the columnar screen 115,
The perforated column (215a) is,
Doedoe detachably formed on the columnar screen 115, a plurality of first holes 215b are formed in one area, and a plurality of second holes having different sizes from the first holes 215b in an opposite area ( 215c) is formed, and is fastened to the columnar screen 115 in the forward direction to introduce treated water into the columnar screen 115 through the first hole 215b, or is fastened in the opposite direction to the second A non-point pollution reduction facility formed to introduce primary treated water into the columnar screen 115 through the hole 215c. a sedimentation tank 110 for precipitating contaminants in the introduced rainwater runoff; and
Including a;
The settling tank 110,
a guiding wall 112 for temporarily storing rainwater runoff flowing in from the inlet 111 and allowing the stored rainwater runoff to have a predetermined residence time in the settling tank 110; and
A columnar screen 115 installed adjacent to the partition wall 130 between the settling tank 110 and the filtration tank 120 in order to flow the primary treated water precipitated in the settling tank 110 to the filtration tank 120 . including;
The filtration tank 120,
a filter media layer 121 spaced apart from the inner bottom surface of the filtration tank 120 by a predetermined distance;
a backwash air pipe 126 that is embedded in the filter medium layer 121 and generates air bubbles for cleaning the filter medium 121a;
a lower perforated plate 123 installed to be seated on the lower support 125 to support the filter media layer 121 from the lower part; and
Installed on the upper pedestal 124, the upper perforated plate 122 spaced apart from the upper side of the filter media layer 121 by a predetermined distance; including;
The filter media layer 121 is
Includes a plurality of filter media (121a) having a specific gravity of 1.2 to 1.5,
The upper perforated plate 122 is
A side bending portion 122c having a vertical bent portion 122d and a horizontal bent portion 122e and formed at each side end of the upper perforated plate 122 to space the upper perforated plate 122 from the upper support 124 . ); and
Center reinforcing bars 122f, 222f that are disposed in the center of the bottom surface of the upper perforated plate 122 and add a predetermined weight so that the upper perforated plate 122 is seated and supported on the upper support 124 during a filtering operation. ); 5. The method according to claim 4,
The upper perforated plate 122 is
A reinforcing bar insertion rib (222g) to which the center reinforcing bar (222f) can be inserted and fastened is formed in the center of the bottom surface,
The center reinforcing bar (222f) is,
The reinforcing bar insertion rib (222g) is inserted or separated to be detachably formed on the upper perforated plate 122, and each includes a plurality of center reinforcing bars (222f-1 to 222f-3) having different weights, and operating environment A non-point pollution reduction facility formed so that any one of the plurality of center reinforcing bars (222f-1 to 222f-3) is selected according to the method and fastened to and used with the reinforcing bar insertion rib (222g). 5. The method according to claim 4,
The upper perforated plate 122 is
An auxiliary support 222h is provided at a position spaced upward by a predetermined interval from the upper support 124, supported from the lower portion by the upper support 124, and upward by the auxiliary support 222h. is regulated, and the upper perforated plate 122 is raised to a predetermined degree from the upper support 124 toward the auxiliary support 222h during backwashing operation, thereby expanding the space through which the filter medium 121a can flow. Non-point pollution reduction facilities formed to

Images