Nonpoint Pollutants Treatment Facility

Abstract

The present invention relates to a circulating non-point source pollution reduction facility. Specifically, the invention relates to a circulating non-point source pollution reduction facility configured to perform re-filtration through a circulation structure even if foreign substances accumulated on the inner surface of the discharge pipe are present when filtering foreign substances contained in initial rainwater and discharging filtered water, and to efficiently discharge contaminated water within the collection tank during backwashing.

Description

Technology Field

[0001] The present invention relates to a circulating non-point source pollution reduction facility.

[0002] Specifically, the invention relates to a circulating non-point source pollution reduction facility configured to perform re-filtration through a circulation structure even if foreign substances accumulated on the inner surface of the discharge pipe are present when filtering foreign substances contained in initial rainwater and discharging filtered water, and to efficiently discharge contaminated water within the collection tank during backwashing. Background Technology

[0004] Rainwater falling from the sky seeps underground through the surface, and some flows over the ground into small streams. Passing through these streams, it flows into rivers or lakes, eventually reaching the sea. During this process, it returns to the atmosphere via water vapor, circulating as rainwater. In this cycle, rainwater plays a role in purifying the air and roads, thereby refreshing people's minds.

[0005] However, during this cycle, pollutants swept in by rainwater from the contaminated atmosphere, roads, and parking lots cause the rainwater to become increasingly contaminated as it flows into rivers, becoming the main culprit behind river pollution and causing fish kills during rainfall or worsening the water quality of the rivers. Such sources of pollution are called rainwater pollution, technically referred to as non-point source pollution, and facilities for treating them are called non-point source pollution reduction facilities.

[0006] In other words, non-point source pollution refers to sources where various pollutants (organic matter, nutrients, heavy metals, particulate matter, various hazardous chemicals, etc.) accumulated on the land surface during the dry season cause water and soil pollution along with stormwater runoff.

[0007] Non-point source pollution reduction facilities are classified into natural and engineered types. Among engineered facilities, filtration facilities are treatment systems that collect stormwater runoff from collection tanks or storm drains, subject it to a sedimentation process in a pretreatment tank, and remove pollutants by passing it through various types of filter media in a filtration tank; they consist of a pretreatment tank and a filtration tank.

[0008] Various types of filter media, such as granular media and fibrous media, can be used for filtration facilities. As filtration continues, the filter media layer becomes clogged, reducing treatment efficiency and decreasing the filtration flow rate. Therefore, treatment processes such as replacing the filter media or backwashing are required to maintain filtration performance.

[0009] However, conventional filtration devices lack facilities to wash the filter media or forcibly drain stagnant water after rainfall ends, so a problem is emerging where untreated rainwater is discharged as the filter layer becomes clogged if not managed meticulously and periodically.

[0010] Therefore, key maintenance considerations for current filtration facilities include backwashing cycles and dredging frequency. However, conventional filtration facilities not only lack such automatic backwashing or stagnant water removal equipment but also suffer from insufficient maintenance personnel and financial resources. Consequently, the introduction of economical and efficient automated equipment must be pursued from the initial installation stage to minimize the need for maintenance personnel and maintenance costs.

[0011] In addition, if water such as groundwater or stream water continues to flow in storm drains even when it is not raining, clean water will flow into the non-point source pollution reduction facility and then continuously flow into the sewage pipes or sewage treatment plant through the stagnant water exclusion equipment installed within the facility, thereby increasing the flow burden on the sewage treatment plant. Therefore, to prevent this phenomenon, measures must be taken such as blocking external inflow during normal times and operating the non-point source pollution reduction facility only during rainfall.

[0012] Meanwhile, to solve the above-mentioned problems, Registered Patent Publication No. 10-1562757 (hereinafter referred to as 'Patent Document 1') has been proposed.

[0013] The above patent document 1 comprises: a pretreatment tank having an inlet formed for rainwater to flow in; a filtration tank having an outlet formed at the bottom for the treated water to flow in and for the treated water to flow out, into which the treated water that has been treated first in the pretreatment tank flows; a filter layer composed of a filter support plate and a filter material, provided inside the filtration tank but at a position higher than the outlet, for removing solids and organic substances contained in the treated water that has been treated first when it passes through the filter material and the filter support plate; a backwash air inlet pipe provided below the filter layer, into which air is introduced from the outside to discharge air so that the filter layer is backwashed; a filtration tank outflow section separated from the filtration tank but installed so that the bottom is connected through the outlet, the backwash air inlet pipe penetrates into the filtration tank, and is a passage for the treated water that has been treated secondarily through the filter layer to flow out to the outside of the treatment facility; and a treatment tank for storing the treated water that has been treated secondarily to backwash the filter layer.

[0014] According to this, primary treated water flows into the upper part of the filtration tank and passes through the filter media layer in a downward flow manner from the upper part to the lower part, thereby retaining fine solids or organic matter in the filter media layer. Secondary treated water is stored in a treatment tank or discharged through an outlet pipe. During backwashing, backwashing is efficiently performed using a flat valve-type backwash water supply valve and a weir plate that prevents sand leakage. Additionally, rainwater is introduced only during rainfall, and the inflow of clean water is blocked when rainfall ends, thereby providing a non-point source pollution reduction facility that can efficiently operate the treatment facility.

[0016] In addition, on the other hand, to solve the above-mentioned problems, Registered Patent Publication No. 10-2616293 (hereinafter referred to as 'Patent Document 2') has been proposed.

[0017] The above patent document 2 relates to a means and method for backwashing a filter media of a non-point source pollution reduction facility, more specifically, a non-point source pollution reduction facility.

[0018] This is a non-point source pollution reduction facility comprising a 'filter media washing means' for removing said pollutants from a filter media layer contaminated water mixed with said filter media and said pollutants attached to said filter media after filtering said non-point source pollutants with said filter media; wherein the filter media washing means comprises a filter media suction means for sucking the filter media layer contaminated water mixed with said filter media and said pollutants into a filter media transfer line through a filter media suction port formed in said filter media layer; a pollutant decontamination device for disturbing the filter media layer contaminated water mixed with said filter media and said pollutants transferred by said filter media suction means to separate said pollutants from said filter media; and a filter media refill port for re-inflowing said filter media layer contaminated water in which said pollutants and said filter media are separated into said filter media layer. Prior art literature

[0020] Registered Patent Publication No. 10-1562757, Non-point source pollution reduction facility Registered Patent Publication No. 10-2616293, Non-point source pollution reduction facility including a pollutant removal filter media circulation device and backwashing method using the same Registered Patent Publication No. 10-1603588, Non-point source pollution reduction device using ecological circulation Registered Patent Publication No. 10-2488107, Non-point source pollution reduction facility The problem to be solved

[0021] The objective of the present invention is to provide a circulating non-point source pollution reduction facility configured to allow re-filtration through a circulation structure even if foreign substances accumulated on the inner surface of the discharge pipe exist, while filtering foreign substances contained in initial rainwater and discharging filtered water, and to efficiently discharge contaminated water within the collection tank during backwashing. means of solving the problem

[0023] The circulating non-point source pollution reduction facility according to the present invention, devised to achieve the above-described purpose, is a non-point source pollution reduction facility composed of a collection tank (10) installed to remove foreign substances contained in rainwater by connecting to a manhole (2) of an existing rainwater pipe (1).

[0024] The initial rainwater flowing in through the above-mentioned collection tank (10) is discharged through a discharge pipe (4) connected to an outlet (12) provided on the other side of the collection tank (10) once filtration is completed through the first collection tank (20), the second collection tank (30), and the third collection tank (40).

[0025] A circulation filter (4a) is formed on one side of the discharge pipe (4), and a circulation pipe (5) composed of a branch pipe is connected to one side of the discharge pipe (4) on which the circulation filter (4a) is formed, wherein the circulation pipe (5) is connected to a secondary collection tank (30) of a collection tank (10) so as to be re-filtered through circulation.

[0027] At this time, the above-mentioned water collection tank (10) includes an inlet (11) for connection with an inlet pipe (3), and a debris screen (111) is installed on one side adjacent to the inlet (11) to filter out debris contained in the initial rainwater and then introduce it into the first water collection tank (20).

[0029] In addition, the initial rainwater flowing into the first water collection tank (20) is filled to a certain amount, then passes over the partition wall (50) and is received into the second water collection tank (30).

[0030] The rainwater contained in the second water collection tank (30) is characterized by being filtered by a filter cartridge (61) coupled to a filter wall (60) configured between it and the third water collection tank (40).

[0032] In addition, a supply pipe (72) configured to receive and transport air from outside the above-mentioned water collection tank (10) and supply air to a secondary water collection tank (30) or a tertiary water collection tank (40);

[0033] A spray pipe (71) having a plurality of backwash nozzles (712) coupled to one end of the supply pipe (72) to supply air towards the filter wall (60) inside the third collection tank (40);

[0034] It is characterized by further including a backwash pipe (70) that includes. Effects of the invention

[0036] According to the circulating non-point source pollution reduction facility of the present invention, when filtering foreign substances contained in initial rainwater and discharging filtered water, it is configured to perform re-filtration through a circulation structure even if foreign substances accumulated on the inner surface of the discharge pipe exist, and to efficiently discharge contaminated water in the collection tank during backwashing. Brief explanation of the drawing

[0038] Figure 1 shows a circulating non-point source pollution reduction facility according to the present invention from the top. Figure 2 shows the collection tank of the circulating non-point source pollution reduction facility according to the present invention from the top. Figure 3 shows a side view of a collection tank of a circulating non-point source pollution reduction facility according to the present invention. Figure 4 shows an enlarged view of a part of the backwash pipe configured in the collection tank of the circulating non-point source pollution reduction facility according to the present invention. Specific details for implementing the invention

[0039] Terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, but should be interpreted in a meaning and concept consistent with the technical spirit of the invention, based on the principle that the inventor can appropriately define the concept of the terms to best describe his invention.

[0041] Therefore, the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention; thus, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing this application.

[0043] Before proceeding with the following description with reference to the drawings, it should be noted that matters not necessary to reveal the gist of the invention, namely known configurations that a person skilled in the art with ordinary knowledge can obviously add, have not been illustrated or described in detail.

[0045] The present invention relates to a circulating non-point source pollution reduction facility.

[0046] Specifically, the invention relates to a circulating non-point source pollution reduction facility configured to perform re-filtration through a circulation structure even if foreign substances accumulated on the inner surface of the discharge pipe are present when filtering foreign substances contained in initial rainwater and discharging filtered water, and to efficiently discharge contaminated water within the collection tank during backwashing.

[0048] The circulating non-point source pollution reduction facility according to the present invention will be explained with reference to the attached drawings.

[0049] Figure 1 shows a circulating non-point source pollution reduction facility according to the present invention from the top.

[0050] At this time, FIG. 2 shows the collection tank of the circulating non-point source pollution reduction facility according to the present invention from the top, and FIG. 3 shows the collection tank of the circulating non-point source pollution reduction facility according to the present invention from the side.

[0051] In addition, Figure 4 shows an enlarged view of a part of the backwash pipe configured in the collection tank of the circulating non-point source pollution reduction facility according to the present invention.

[0053] The circulating non-point source pollution reduction facility according to the present invention, as shown in the attached drawings as above, is installed to remove foreign substances contained in rainwater by connecting to the manhole (2) of the existing rainwater pipe (1), as shown in Fig. 1 of the attached drawings.

[0054] First, when initial rainwater flows in through the existing rainwater pipe (1) due to rainfall, it is guided to the collection tank (10) along the inflow pipe (3) by the weir (1a) of the existing rainwater pipe (1) located inside the manhole (2).

[0055] Meanwhile, an oil detection measuring device may be further installed on one side of the manhole (2), and an oil separator (1b) is formed at one end of the inlet pipe (3), so that even if oil flows in through the existing rainwater pipe (1), it is detected and the oil separator (1b) is activated. Accordingly, it is possible to prevent oil from flowing into the collection tank (10).

[0057] In addition, the initial rainwater flowing in through the above-mentioned collection tank (10) is discharged through a discharge pipe (4) connected to an outlet (12) provided on the other side of the collection tank (10) once filtration is completed through the first collection tank (20), the second collection tank (30), and the third collection tank (40).

[0059] The above water collection tank (10) includes an inlet (11) for connection with an inlet pipe (3).

[0060] This is illustrated in Figure 2 of the attached drawings.

[0061] A debris screen (111) is installed on one side adjacent to the inlet (11). This debris screen is designed to filter out debris contained in the initial rainwater.

[0063] The initial rainwater that flows in through the above debris screen (111) is collected in the primary collection tank (10).

[0064] And most of the foreign substances contained in the initial rainwater contained in the first collection tank (10) settle inside the first collection tank (10) due to sedimentation, and when the accumulated initial rainwater is filled to a certain amount (height of the partition wall (50)), it is received in the second collection tank (30) beyond the partition wall (50) (see FIG. 3).

[0065] And the rainwater collected in the second collection tank (30) passes through a filter wall (60) in which a plurality of filter cartridges (61) are arranged and installed, and the filtered rainwater, in which foreign substances are filtered, is collected in the third collection tank (40).

[0066] At this time, the filter cartridge (61) may be one used in conventional non-point source pollution facilities, and preferably may be configured in a cylindrical shape, with the outside composed of a filter mesh and the inside filled with filter material.

[0067] These filter cartridges (61) are inserted and coupled through a plurality of through holes formed in the filter wall (60).

[0069] And when the filtered rainwater that is transferred to and received in the third collection tank (40) accumulates to a certain amount or more, it is discharged through the discharge pipe (4) via the discharge port (12).

[0070] At this time, it is preferable that the discharge port (12) have a height of at least a certain amount so that the filtered rainwater in the third collection tank (40) can accumulate at least a certain amount.

[0072] In the configuration as described above, the filter cartridge (61) of the filter wall (60) may adsorb foreign substances due to continuous filtration of rainwater, and may be replaced and repaired when it reaches a level where it is unusable, but since a certain interval must be secured for work for replacement and maintenance, a structure for backwashing is adopted.

[0074] The structure for this backwashing is configured to supply air supplied from a blower (73) located on the outside (ground) of the water collection tank (10) through a supply pipe (72), and a spray pipe (71) is connected to one end of the supply pipe (72) so as to supply the supplied air into the third water collection tank (40).

[0075] At this time, the supply pipe (72) may pass through one side of the filter wall (60) where the filter cartridge (61) is not connected and go from the second collection tank (30) to the third collection tank (40), or the supply pipe (72) may be positioned inside the third collection tank (40) from the beginning.

[0076] A plurality of backwash nozzles (712) are provided on one side of the above-mentioned spray pipe (71) so as to face the filter wall (60). That is, air supplied through the supply pipe (72) is sprayed in the direction of the filter wall (60) through the backwash nozzles (712), thereby allowing foreign substances adsorbed on the filter cartridge (61) to fall into the secondary collection tank (30).

[0078] At this time, a sediment filtering section (80) is formed inside the secondary collection tank (30), and the sediment filtering section (80) is formed horizontally from the partition wall (50) toward the secondary collection tank (30) and includes a horizontal wall (82) formed to be spaced apart from the bottom surface of the secondary collection tank (30) at a certain distance, and a vertical wall (81) that is bent in a vertical direction from one end of the horizontal wall (82) and extended upward.

[0079] At this time, a hollow is formed in the vertical wall (81) to connect a filter mesh (811).

[0080] It is preferable that the filter mesh (81) has a mesh size smaller than that of the filter cartridge (61). This is to allow foreign substances that are adsorbed to the filter cartridge (61) and fall due to backwashing to descend along the vertical wall (81) of the sediment filtering section (80).

[0081] However, rainwater transferred from the second collection tank (30) to the third collection tank (40) may be filtered through a filter net (81).

[0082] In addition, by forming two inclined surfaces (821) formed in symmetrical directions on one side of the horizontal wall (82), water contained in rainwater may be allowed to fall to the lower side of the horizontal wall (82).

[0083] By forming a drain valve (13) on one side of the water collection tank (10) that corresponds to the lower surface of the secondary water collection tank (30), it is possible to discharge accumulated foreign matter as needed.

[0085] Meanwhile, in configuring the above-mentioned backwash pipe (70), as shown in Fig. 4 of the attached drawings, the backwash nozzle (712) is formed only up to a position lower than the discharge port (12) of the water collection tank (10).

[0086] However, the spray pipe (71) of the above backwash pipe (70) is extended to a position higher than the discharge port (12), and at this time, a discharge-guiding nozzle (711) formed in the direction of the discharge port (12) may be formed in the spray pipe (71) corresponding to the position higher than the discharge port (12).

[0087] At this time, regarding the injection pipe (71), the injection pipe (71) formed in a vertical direction based on the drawing may be formed in multiple horizontal directions (vertical direction) and branched from the supply pipe (72), or conversely, the injection pipe (71) formed in a horizontal direction may be formed in multiple vertical directions.

[0089] And in configuring the above-mentioned spray pipe (71), in the case where multiple spray pipes (71) formed in the horizontal direction are formed in the vertical direction, it is sufficient to form a discharge-inducing nozzle (711) only on the spray pipe (71) that is at a position higher than the discharge port (12), but

[0090] Conversely, if a number of spray pipes (71) formed vertically based on the drawing are formed horizontally, it is necessary to configure one side of the spray pipe (71) as a double pipe as shown in Fig. 4 of the attached drawing.

[0091] For example, a valve is connected to the injection pipe (71) facing downward relative to the supply pipe (72), and the injection pipe (71) facing upward is formed as a double pipe and separated into a first injection pipe (71a) and a second injection pipe (71b), with valves configured in each of the first and second injection pipes (71a, 71b).

[0092] And each valve is opened and closed through a separate control means.

[0093] That is, the air supplied through the first injection pipe (71a) is sprayed into the backwash nozzle (712), and the air supplied through the second injection pipe (71b) is discharged through the discharge induction nozzle (711).

[0094] The air sprayed through the above-mentioned discharge-inducing nozzle (711) generates air in the direction of the discharge port (12) to assist in the discharge of filtered rainwater.

[0095] As another example, instead of configuring the first and second injection pipes (71a, 71b) and valves described above, the injection pipe (71) may include both the discharge induction nozzle (711) and the backwash nozzle (712) and generate air.

[0097] Meanwhile, the filtered rainwater discharged through the outlet (12) through the process described above is transferred to the rainwater pipe (1) through the discharge pipe (4), and at this time, there is a possibility that foreign substances or moss may be generated in the discharge pipe (4) due to the continuous movement of water.

[0098] At this time, a circulation filter (4a) is further formed on one side of the discharge pipe (4), and a circulation pipe (5) composed of a branch pipe is connected to one side of the discharge pipe (4) where the circulation filter (4a) is formed.

[0099] The above circulation pipe (5) is connected to one side of the secondary collection tank (30) of the collection tank (10), and this can be referred to by the reference numeral '5' shown in FIG. 3.

[0100] That is, it is to be filtered again in the secondary collection tank (30).

[0102] According to the circulating non-point source pollution reduction facility of the present invention configured as described above, when filtering foreign substances contained in initial rainwater and discharging filtered water, it is configured to perform re-filtration through a circulation structure even if foreign substances accumulated on the inner surface of the discharge pipe exist, and to efficiently discharge contaminated water in the collection tank during backwashing.

[0104] The description above using the drawings describes only the main aspects of the present invention, and it is obvious that the present invention is not limited to the configuration of the drawings, as various designs are possible within the technical scope. Explanation of the symbols

[0106] 1 : Existing storm drain 1a : weir 1b: Oil separator 2 : Manhole 3: Inlet pipe 4: Discharge pipe 4a : Circulating filter 5: Circulatory tube 10 : Sump 11: Inlet 111 : Contaminant Screen 12: Outlet 13 : Drain valve 20 : 1st sump 30 : Secondary sump 40 : 3rd sump 50 : Bulkhead 60 : Filter wall 61: Filter Cartridge 70 : Backwash pipe 71 : Spray tube 711: Discharge induction nozzle 712: Backwash nozzle 71a: 1st injection tube 71b: Second injection tube 72 : Supply pipe 73 : Blower 80 : Sediment filter 81 : Vertical wall 811 : Filter screen 82 : Horizontal wall 821 : Slope

Claims

Claim 1 A non-point source pollution reduction facility comprising a collection tank (10) installed to remove foreign substances contained in rainwater by connecting to a manhole (2) of an existing rainwater pipe (1), wherein initial rainwater flowing in through the collection tank (10) is discharged through a discharge pipe (4) connected to a discharge port (12) provided on the other side of the collection tank (10) after filtration is completed through a first collection tank (20), a second collection tank (30), and a third collection tank (40), wherein a circulation filter (4a) is formed on one side of the discharge pipe (4), and a circulation pipe (5) composed of a branch pipe is connected to one side of the discharge pipe (4) where the circulation filter (4a) is formed, wherein the circulation pipe (5) is connected to the second collection tank (30) of the collection tank (10) so as to be re-filtered through circulation, and wherein the collection tank (10) includes an inlet port (11) for connection with an inlet pipe (3). A debris screen (111) is installed on one side adjacent to the inlet (11) to filter out debris contained in the initial rainwater and then introduce it into the first collection tank (20); the initial rainwater introduced into the first collection tank (20) is received into the second collection tank (30) by passing over the partition wall (50) as it fills to a certain amount; the rainwater received in the second collection tank (30) is filtered by a filter cartridge (61) coupled to a filter wall (60) configured between it and the third collection tank (40); a supply pipe (72) configured to receive and transport air from outside the collection tank (10) and supply air to the second collection tank (30) or the third collection tank (40); and a plurality of backwash nozzles (712) coupled to one end of the supply pipe (72) to supply air towards the filter wall (60) inside the third collection tank (40). Backwash pipe (70) including a spray pipe (71);In addition, the backwash nozzle (712) is formed only up to a position lower than the discharge port (12) of the water collection tank (10), and the spray pipe (71) of the backwash pipe (70) is extended up to a position higher than the discharge port (12). A discharge-guiding nozzle (711) formed in the direction of the discharge port (12) is formed in the spray pipe (71) corresponding to the position higher than the discharge port (12). A valve is connected to the spray pipe (71). The spray pipe (71) facing the other direction is formed as a double pipe to be separated into a first spray pipe (71a) and a second spray pipe (71b), and a valve is configured in each of the first and second spray pipes (71a, 71b). As a result, air supplied through the first spray pipe (71a) is sprayed into the backwash nozzle (712), and air supplied through the second spray pipe (71b) is sprayed into the discharge-guiding nozzle (711). A circulating non-point source pollution reduction facility characterized by discharge through. Claim 2 delete Claim 3 delete Claim 4 delete

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