KR100862740B1 - Non-point source treatment equipment by two-stage vortex and filtration - Google Patents

Abstract

The present invention relates to a two-stage vortex type nonpoint source treatment apparatus, and more particularly, to a nonpoint source treatment apparatus capable of effectively separating not only coarse solids and oils contained in rainwater but also fine solids and suspended solids.

According to the present invention, the first rainwater treated with the rainwater is formed by forming a vortex, and the foreign matter in the rainwater is separated by the difference in specific gravity. It is equipped with the 2nd process part which separate | separates the foreign matter which remains in rainwater.

According to the present invention, by removing the foreign matter in rainwater in two stages by the continuous treatment of stormwater in a continuous arrangement, the removal rate of foreign matters such as coarse solids and oils can be greatly improved, and the fine foreign matter contained in the rainwater by mixing the filtration method. And even suspended solids can be effectively filtered by the filtering member.

Description

Non-point source contaminant treatment apparatus of two-stage swirl and filtering type

The present invention relates to a two-stage vortex type nonpoint source treatment apparatus, and more particularly, to a nonpoint source treatment apparatus capable of effectively separating not only coarse solids and oils contained in rainwater but also fine solids and suspended solids.

In general, pollutants generated in urban areas are classified into point sources and nonpoint sources. Among them, nonpoint sources are pollutants exposed to the surface of the rainfall during rainfall, which flow into sewage pipes.

In particular, when the nonpoint source contained in the initial rainwater enters public waters, it causes pollution of rivers and lakes, and also penetrates into the basement, which is one factor causing pollution of groundwater resources. Therefore, contaminants introduced with the initial stormwater must be discharged into the discharge water after purification and purification.

The conventional initial excellent treatment device for treating the contaminants introduced with the initial excellent water is a variety of initial excellent treatment device, such as storage type such as artificial wetland, filtration type such as filtration tank, device type such as swirl treatment device, etc. Each of these early stormwater treatment units has advantages and disadvantages, and the method of application should be different depending on the characteristics of the watershed to which the initial stormwater treatment units are applied.

However, the storage type has a problem in that it is applied to the urban area because the facility area is largely required, and the initial excellent treatment apparatus applied to the urban area is mainly treated by the vortex method (Swirl treatment method) using centrifugal force and filtration. Most of the methods are used, and the treatment efficiency of the initial excellent treatment method has a constant efficiency for each treatment device, but it is difficult to expect a resilient treatment efficiency for the non-point pollutant caused by rainfall with a large change in flow rate and concentration.

Conventional vortex method has the disadvantage that the sediment can be removed, but it is difficult to remove the suspended solids, especially when the initial rainwater in the reactor tank due to rainfall, the accumulated sediment due to the rainfall during the resuspension through the vortex As a result of this, there is a problem that the resulting water treatment efficiency is lowered.

In addition, the filtration method is more effective in removing particulate matter than the swirl method. However, since the rapid settling is difficult, the required capacity of the device is large and the existing sediment re-injuries when the initial rainfall is introduced. This deterioration problem occurs.

The present invention has been made to improve the above problems, to provide a two-stage vortex type non-point source treatment apparatus capable of efficiently removing foreign matter in the rain by the storm treatment of the two-stage continuous arrangement. There is this.

Another object of the present invention is to provide a non-point source treatment apparatus capable of effectively removing fine foreign matters and suspended solids while taking advantage of the vortex method by mixing the vortex method and the filtration method.

The two-stage vortex type non-point source treatment apparatus of the present invention for achieving the above object comprises a first treatment unit to form an influent rainwater vortex to separate foreign matter in the rainwater by the difference in specific gravity; And a second processing unit which separates the foreign matter remaining in the rainwater by the difference in specific gravity and filtering while forming the vortex flowed into the first rainwater treated by the first processing unit to form a vortex.

And a third processing unit for filtering the suspended solids in the rainwater that was secondly processed by the second processing unit.

The first processing unit and the second processing unit is a sedimentation tank to the rain flows through the inlet pipe installed in the upper portion, the separation tank is installed inside the sedimentation tank and rainwater flows into the underflow from the sedimentation tank to form an upflow, A receiving tank installed inside the separation tank to flow downflow from the separation tank to form an upflow, and an upper installation of the rainwater flow into the underflow from the accommodation tank to form an upflow; Characterized in that it comprises a discharge tank discharged through the discharge pipe installed in.

Between the inner surface of the separation tank and the outer surface of the receiving tank is characterized in that it further comprises a rib formed across the direction in which rainwater flows in order to prevent the flotation of the precipitate deposited on the bottom of the settling tank.

The second processing unit may be further provided with a first filtration member filling the inside of the discharge tank to filter foreign substances.

The third processing unit has a partition partitioning an inner space into an upper space portion and a lower space portion, and the rainwater processed secondly from the second processing portion flows into the upper space portion, and is installed to vertically penetrate the partition wall. A filtration tank for flowing rainwater to the lower space portion through a plurality of through holes formed therein, a second filtration member installed at the filtration tank to filter the suspended solids, and a discharge pipe installed at the lower space portion to discharge rainwater outwardly. It is characterized by including.

The lower part of the settling tank of the first filtration unit is characterized in that it further comprises a plurality of settling guide plate is inclined along the circumference of the inner circumferential surface of the settling tank spaced upwards and a predetermined distance upward to induce precipitation of the foreign matter.

As described above, according to the two-stage vortex type non-point source treatment apparatus of the present invention, by removing the foreign matter in the rainwater in two stages by the continuous treatment of the vortex type rainwater treatment system, the removal rate of coarse solids and oils can be greatly improved. Can be.

In addition, by mixing the filtration method with the vortex method, even fine foreign matter and suspended matter contained in the rainwater can be effectively filtered by the filtration member.

In addition, the sedimentation guide plate to induce foreign matters and at the same time provides the advantage of preventing the flotation of sediment deposited on the floor by structurally separating the sedimentation accumulation zone.

Hereinafter, a two-stage vortex type nonpoint source treatment apparatus according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic view showing a non-point source treatment apparatus according to an embodiment of the present invention, Figure 2 is a partial cutaway perspective view showing the first and second processing units applied to the non-point source treatment apparatus of Figure 1, 3 is a partially cutaway perspective view showing a third treatment unit applied to the non-point source treatment apparatus of FIG. 1, and FIG. 4 is a partially cutaway perspective view showing a first treatment unit applied to the non-point source treatment apparatus according to another embodiment of the present invention. .

1 to 3, the two-stage vortex type nonpoint source treatment apparatus of the present invention is a nonpoint pollution workplace that occurs during or after the construction of an industrial project, construction of an airport, development of a tourism complex, development of a mountainous area, etc. Alternatively, it is to treat non-point pollution sources that occur on the surface of roads or ground where various pollutants are accumulated.

An apparatus for treating a nonpoint source according to an embodiment of the present invention includes a first processing part 3 and a second processing part 5 of a vortex type which are continuously arranged in two stages, and a third processing part 7 of a filtration type. .

The first processing unit 3 forms a rainwater vortex flowing into the interior, and separates solid foreign matter and oil having a relatively large particle such as earth and sand and coarse coarse matter in the rainwater by the difference in specific gravity, and the second processing unit 5 includes the first The first treated rainwater flows into the processing unit to form vortices, and the remaining foreign matter in the rainwater is separated by the difference in specific gravity and filtering, and the third processing unit 7 filters the fine solid foreign matter or suspended matter in the second rainwater treated. Finally, the present invention effectively removes fine solid foreign matter or suspended solids by filtration.

The first processing unit 3 is a sedimentation tank 10 in which rainwater flows through the inlet pipe 11 installed in the upper portion, and is installed inside the sedimentation tank 10 so that rainwater flows into the underflow from the sedimentation tank 10. Separation tank 21 to form an upflow, the receiving tank 25 is installed in the interior of the separation tank 21, rainwater flows into the overflow from the separation tank 21 to form a downflow, and the receiving tank ( It is provided in the inside of 25) is provided with a discharge tank 31 which is discharged through the discharge pipe 13 installed on the upper by forming the upstream flow rainwater flows into the underflow from the receiving tank (25).

The settling tank 10 is a hollow cylindrical shape, the outside is formed in a square and the inside has a circular shape. The sedimentation tank 10 is embedded so that only the upper surface on which the cover 15 is detachable is exposed to the outside, and is made of a material of a certain thickness of concrete, reinforced plastic, polyethylene, and the like so that external foreign substances in the ground do not flow into the inside.

Rainwater is introduced through the inlet pipe 11 installed on the settling tank 10. In this case, the inflow pipe 11 is formed in a tangential direction of the inner circumferential surface so that the rainwater flowing through the inflow pipe 11 can easily form a vortex on the inner circumferential surface of the settling tank 11. The vortices formed inside the sedimentation tank 10 settle soil, sand, heavy metals, etc., which are large foreign matters in rainwater, to the bottom surface of the sedimentation tank 10. Let them rise above the water. As described above, the sedimentation tank 10 is to be effectively separated according to the specific gravity of the foreign matter to form a storm vortex.

As shown in FIG. 4, the sedimentation tank 10 is spaced apart from the bottom 95 of the sedimentation tank 10 by a predetermined distance and inclined along the inner circumferential surface of the sedimentation tank 10 so as to induce precipitation of foreign substances having a high specific gravity as shown in FIG. 4. A plurality of precipitation induction plate 91 to be formed is formed, the bottom 95 of the precipitation tank 10 may be formed in a conical shape.

Precipitation guide plate 91 is formed in a plurality of plate-shaped one side is connected along the inner peripheral surface of the settling tank 10 and the other side is connected along the outer peripheral surface of the receiving tank (25). In addition, each precipitation guide plate 91 is formed to be spaced apart from the adjacent precipitation guide plate by a predetermined distance is formed between the mutually adjacent precipitation guide plate is formed a gap that can be settled downward.

In this case, the precipitation induction plate 91 is preferably inclined along the rotational direction of rainwater. That is, the rainwater that gradually descends while rotating along the inner circumferential surface of the settling tank 91 flows along the upper portion of the settling guide plate 91 at the bottom of the settling tank 10 and is inclined gaps formed between the settling guide plates 91. As the foreign matter is settled and accumulated on the bottom 95 of the sedimentation tank. The upper portion of the precipitation induction plate 91 is a vortex is formed by the rainwater flowing in, but the lower portion of the precipitation induction plate 91 does not generate vortex and water flow is almost stopped. Therefore, even if the initial excellent water flows into the settling tank 10, it is possible to prevent the precipitated foreign matter rises.

Separation tank 21 is installed inside the settling tank 10 to be spaced apart from the inner circumferential surface of the settling tank 10 by a predetermined distance. Separation tank 21 has a cylindrical shape of the lower side is open, the upper end is fixed to the upper surface of the settling tank 10, the lower end is formed to be spaced apart from the bottom of the settling tank 10. Therefore, the rainwater introduced into the settling tank 10 is introduced into the underflow in the lower side of the separation tank (21). In this case, the ribs 35 and 37 are formed to reduce the flow rate of rainwater flowing into the lower portion of the separation tank 21 and filling upstream and to prevent the sediment from rising.

Two ribs 35 and 37 are installed at the upper and lower portions, respectively, and as shown, the lower ribs 35 are horizontally formed along the circumference of the inner circumferential surface of the separating tank 21, and the receiving tank 25 is provided. The upper rib 37 is formed horizontally along the circumference of the outer surface of the upper rib 37. The ribs 35 and 37 form an excellent S-shaped flow path, thereby reducing the flow rate to form laminar flow.

The receiving tank 25 is installed in the separation tank 21 spaced apart from the inner circumferential surface of the separation tank 21 by a predetermined distance. Receiving tank 25 is a cylindrical shape in which the upper side is open, the bottom is spaced apart a certain height from the bottom surface of the settling tank 10, the top is fixed to be spaced apart from the top surface of the settling tank 10 by a predetermined distance. Although not shown, the receiving tank 25 is fixed by a connecting bar interconnecting the outer circumferential surface of the receiving tank 25 and the inner circumferential surface of the separating tank 21. Rainwater introduced into the separation tank 21 flows into the receiving tank 25 in an overflow from the upper side of the separation tank 21.

The discharge tank 31 is installed in the interior of the receiving tank 25 spaced apart from the inner peripheral surface of the receiving tank 25 by a predetermined distance. Discharge tank 31 is formed in a cylindrical shape of the lower side is opened so that the bottom is spaced apart a predetermined distance from the bottom surface of the settling tank 10, the top is fixed to the top surface of the settling tank (10). In this case, the upper end is fixed to the edge of the coupling hole 16 to which the cover 15 is coupled. And the discharge pipe 13 is installed on the upper side of the discharge tank 31. Therefore, the rainwater flowing into the underflow from the receiving tank 25 flows into the upper portion of the discharge tank 31 and flows into the second processing unit 5 through the discharge pipe 13.

As described above, the first treatment part 3 separates the foreign substances and oil in the rainwater from the sedimentation tank and then the S-type flow path of the multistage type by the rainwater separation tank 21, the receiving tank 25, and the discharge tank 31. By this, it is possible to minimize the discharge of the precipitate to the second treatment unit (5).

The second processing unit 5 into which the rainwater discharged from the first processing unit 3 flows has the same configuration and function as the first processing unit 3.

However, the discharge tank 40 of the second processing unit 5 is filled with a first filtration member inside the discharge tank 40 in order to separate the remaining foreign matter in the rainwater by filtering. Preferably, one filtration member is formed by being stacked in two stages. The first filtering member has a gravel layer 41 is formed on the lower side, the sand layer 43 is formed on the gravel layer. At this time, porous partition plates 45 and 47 for partitioning the gravel 41 and the sand 43 are installed.

Gravel has an average size of 2 to 5mm, sand is preferably an average size of 0.8 to 1.2mm. The rainwater passing through the receiving tank of the second processing unit 5 by this filtration member is effectively removed to the remaining foreign matter such as fine foreign matter in the rainwater by the first filtration member while passing through the discharge tank 40 upward.

And a hole is formed in the upper surface located between the first processing unit 3 and the second processing unit 5 for maintaining the management of the settling tank, the cover is provided with a removable cover 96.

As described above, the present invention can significantly increase the removal efficiency of foreign matter contained in rainwater by the two-stage vortex type treatment apparatus arranged in series. In addition, the first filtration member installed in the second processing unit 5 has the advantage of removing even fine foreign matter.

The third processing unit 7 removes even foreign matter in the rainwater that has not been removed by the vortex method by filtering the fine foreign matter or suspended matter in the rainwater that has passed through the first and second processing units by the second filtration member.

The third processing unit 7 has a partition wall 51 for dividing the internal space into the upper space portion 53 and the lower space portion 55, and the rainwater treated by the second processing portion 5 to the upper space portion 53. It is installed to penetrate the main body 50 and the partition wall 51 vertically, and surrounds the outer surface of the filtration tank 61 and the filtering tank 61 for flowing rainwater to the lower space portion 55 through a plurality of through holes formed in the side surface. And a second filtration member for filtering the suspended solids and a discharge pipe 85 installed in the lower space part 55 to discharge rainwater to the outside.

Body 50 is made of a material of a certain thickness of concrete, reinforced plastic, polyethylene, etc., is formed in a rectangular tubular shape. The upper surface of the main body 50 is formed with a square coupling hole to which the grating 71 of the lattice shape is coupled. The interior of the main body 50 is partitioned into an upper space portion 53 and a lower space portion 55 by a partition wall 51 crossing the inner space horizontally.

Four insertion holes 67 are formed in the partition 51, and each insertion hole 67 is provided so that the filtration tank 61 can be attached or detached. The filtration tank 61 is a cylindrical shape with an open top, and the upper end is formed at the same height as the partition wall 51 or slightly higher than the partition wall 51. And the lower part of the filtration tank 61 is supported by the support plate 57.

A plurality of through holes are formed on the side surface of the filtration tank 61 so that rainwater flowing into the interior of the filtration tank through the upper end of the filtration tank 61 may flow to the lower space 55 through the through holes. In this case, the filtration tank 61 is provided with the 2nd filtration member so that the fine foreign matter or suspended matter in rainwater may be filtered. For example, the second filtration member may be a nonwoven fabric 65 surrounding the outer surface of the filtration tank 61. Such nonwoven fabric 65 removes fine foreign matter and suspended matter in rainwater. In order to prepare for the case where the nonwoven fabric is blocked by foreign matter, a bypass pipe 85 connected to the discharge pipe 81 is installed on the side wall of the main body 50 of the upper space part 53.

In order to replace or wash the nonwoven fabric 65, the filtration tank 61 in which the nonwoven fabric is installed is detached from the insertion hole 67 of the partition wall 51, and the nonwoven fabric 65 is replaced or washed and reinstalled. Therefore, the nonwoven fabric 65 may be replaced and washed periodically, thereby increasing processing efficiency.

Rainwater flowing from the second processing unit 5 as described above flows into the upper space portion 53 of the third processing unit and passes through the filtration tank 61 to the lower space portion. And the rainwater moved to the lower space 55 is finally discharged to the river and the like through the discharge pipe (81).

Although the present invention has been described with reference to the embodiments illustrated in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent embodiments are possible.

Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

1 is a schematic view showing a non-point source removal apparatus according to an embodiment of the present invention,

FIG. 2 is a partially cutaway perspective view illustrating the first and second processing units applied to the non-point source removing apparatus of FIG. 1;

3 is a partially cutaway perspective view illustrating a third treatment unit applied to the non-point source removing apparatus of FIG. 1;

Figure 4 is a partially cutaway perspective view showing a first treatment unit applied to the non-point source removal apparatus according to another embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

3: first processor 5: second processor

7: third treatment part 10: sedimentation tank

21: separation tank 25: water tank

31: discharge tank 41: gravel layer

43: sand layer 50: main body

51: partition 61: filtration tank

65: nonwoven fabric 81: discharge pipe

Claims (7)

A first treatment part in which rainwater flowing in forms a vortex and the foreign matter in the rainwater is separated by a difference in specific gravity; A second treatment unit for separating the remaining foreign matter in the rainwater by the difference in specific gravity and filtering while rainwater firstly processed by the first treatment unit forms a vortex; and a two-stage vortex type nonpoint source treatment apparatus comprising: . The apparatus of claim 1, further comprising a third processing unit for filtering the suspended solids in the rainwater secondary treated by the second processing unit. According to claim 1, wherein the first processing unit and the second processing unit is settled in the rainwater flows through the inlet pipe installed in the upper portion, and the inside of the settling tank is installed in the precipitation tank rainwater flows into the underflow and upflow A separation tank for forming a water tank, which is installed inside the separation tank, and rainwater flows from the separation tank into an overflow flow, and a downflow tank is formed inside the water tank, and rainwater flows into the underflow flow from the storage tank. Two-stage vortex type non-point source treatment apparatus characterized in that it comprises an discharge tank which is discharged through the discharge pipe installed in the upper portion to form an upstream. According to claim 3, Between the inner surface of the separation tank and the outer surface of the receiving tank further comprises a rib formed across the direction in which rainwater flows in order to prevent the flotation of sediment deposited on the bottom of the sedimentation tank. Two-stage vortex type nonpoint source treatment device. 4. The two-stage vortex type non-point source treatment apparatus according to claim 3, wherein the second processing unit further comprises a first filtration member filling the inside of the discharge tank to filter foreign substances. According to claim 2, wherein the third processing unit has a partition for partitioning the inner space into the upper space and the lower space portion, the main body in which the rainwater second-treated from the second processing portion flows into the upper space portion, and the partition vertically A filtration tank installed to penetrate and flowing rainwater to the lower space through a plurality of through holes formed in the side, a second filtration member installed in the filtration tank to filter the suspended solids, and a rainwater installed in the lower space A two-stage vortex type nonpoint source treatment apparatus, comprising: a discharge pipe discharged to the furnace. According to claim 3, wherein the lower part of the settling tank of the first filtration unit is further provided with a plurality of settling guide plate which is formed to be inclined along the inner circumferential surface of the settling tank spaced apart above a certain distance to induce the precipitation of the foreign matter Two-stage vortex type nonpoint source treatment apparatus, characterized in that.

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