KR100537798B1 - Apparatus for removal of nonpoint source pollution using a hydrodynamic filter separator - Google Patents

Abstract

The present invention relates to an improved type of non-point source removal device having a filter mounted directly inside a hydrodynamic separator (HDS; Hydrodynamic Separator), the cylindrical swirl flow chamber (10) for rotating the influent; An inlet 20 formed at one side of the swirl flow chamber 10 and having an inflow water therein; A filter chamber 30 extended with the swirl flow chamber 10 on the swirl flow chamber 10; A filter cartridge 40 mounted inside the filter chamber 30; A filter 50 accommodated inside the filter cartridge 40; A treatment water discharge part 60 formed at one side of the filter chamber 30 and discharged from the treatment water; A central shaft 70 supporting the filter cartridge 40 and removing air bubbles; A float trap 80 installed at one side of the filter chamber 30 to discharge the float in the treated water to the outside; It is formed on the upper side edge of the filter chamber 30, the overflow water discharge portion 90 for overflowing the influent in case of; According to the non-point source removal apparatus using the hydrodynamic filtration separation method according to the present invention, the particle separation efficiency of the non-point contaminants is improved, and the life of the filter is improved, the equipment by forming the swirl flow chamber and the filter chamber integrally formed in the same container It can reduce the required area.

Description

Non-point source removal device using hydrodynamic filtration separation method {APPARATUS FOR REMOVAL OF NONPOINT SOURCE POLLUTION USING A HYDRODYNAMIC FILTER SEPARATOR}

The present invention relates to an urban non-point pollutant purifying apparatus for purifying non-point pollutants generated in an urban area, and more particularly, an improved type of boiling point in which a filter is directly installed inside a hydrodynamic separator (HDS). The present invention relates to a pollution source removal device.

Pollutants generated in urban areas can be divided into point sources and nonpoint sources. Non-point source is a source of pollutants washed out by rainwater during rainfall and is very difficult to treat because of the concentration of runoff during rainfall. Non-point sources have not been recognized for their importance as pollutants because the outflow of pollutants is concentrated only during rainfall and the sources are dispersed in large areas. However, the first runoff (first-flush), which causes surface pollutants to flow out at the early stage of rainfall, has a high concentration of pollutants, especially in urban areas, and is likely to contain toxic substances such as heavy metals. This is required.

The facilities that are applied as non-point source treatment facilities include various types of treatment facilities, such as reservoir type such as artificial wetland, device type such as swirl treatment device, and filtration type such as filtration tank, and these facilities have advantages and disadvantages. The application method should be different. In Korea, however, most of the facilities that are applied as non-point source treatment facilities are storage-type, which requires a large amount of facility area, which causes problems in urban areas.

Therefore, most of the non-point source reduction facilities applied to urban areas are mostly centrifugal and filtration. Examining the treatment efficiency of these treatment facilities, each treatment facility has a certain treatment efficiency, but it is difficult to expect a flexible treatment efficiency for non-point sources with large flow rate and concentration changes.

In the existing conventional technology, the treatment facility using the filter medium has a high treatment efficiency of 90% or more when the inflow flow rate is small.However, due to the small surface area load ratio, only a part of the rainfall effluent has high treatment efficiency and most rainfall except the treatment capacity The effluent is not treated at all.

The treatment facilities such as the swirl type, which is a representative technique using centrifugal force, are other treatment facilities that have a high treatment speed but low treatment efficiency, which is effective when the flow rate is large, but is effective even when the flow rate is small. The same low processing efficiency is applied as for the flow rate.

In addition, when the filtration equipment is separately installed in the device of the above type, the filter medium must be frequently replaced due to the blockage of the filtration medium, and if the site required by the filtration facility is limited, it is difficult to install.

The present invention has been made to solve the above-mentioned conventional problems, an object of the present invention, to improve the particle separation efficiency of non-point contaminants and to provide a non-point source removal apparatus with improved filter life.

The object of the present invention as described above, the cylindrical swirl flow chamber 10 for rotating the influent; An inlet 20 formed at one side of the swirl flow chamber 10 and having an inflow water therein; A filter chamber 30 extended with the swirl flow chamber 10 on the swirl flow chamber 10; A filter cartridge 40 mounted inside the filter chamber 30; A filter 50 accommodated inside the filter cartridge 40; A discharge part 60 formed at one side of the filter chamber 30 to discharge treated water; A central shaft 70 supporting the filter cartridge 40 and removing air bubbles; A float trap 80 installed at one side of the filter chamber 30 to discharge the float in the treated water to the outside; It is formed by the non-point source removal apparatus using a hydrodynamic filtration separation method, characterized in that; formed on the upper one side edge of the filter chamber 30, the overflow water discharge portion 90 for overflowing the influent in case of emergency. .

In the present invention, the swirl flow chamber and the filter chamber are integrally formed in the same vessel, and the diameters of the chambers are different from each other to reduce the required equipment area and efficiently separate particles of non-point contaminants.

In addition, the present invention adopts an upflow filtration method using particulate media having a specific gravity smaller than that of water to remove non-point pollutants caused by rainfall, thereby washing the media by itself to increase the media life.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description of the invention and the preferred embodiments in connection with the accompanying drawings.

Hereinafter will be described the configuration of the non-point source removal apparatus using a hydrodynamic filtration separation method according to the present invention.

1 is a block diagram of a non-point source removal apparatus using a hydrodynamic filtration separation method according to an embodiment of the present invention, Figure 2 is a plan view of a non-point source removal apparatus according to FIG. As shown in Fig. 1 and 2, the non-point source removal apparatus includes a large swirl flow chamber 10, filter chamber 30, filter 50, inlet 20 and outlet 60. .

Between the swirl flow chamber 10 and the filter chamber 30 includes a flow rate buffer 16, the diameter gradually decreases toward the lower direction, the diameter of the filter chamber 30 is the swirl flow chamber ( It is formed larger than the diameter of 10). One side of the swirl flow chamber 10 is formed with an inflow portion 20 through which the inflow water flows, and the inflow portion 20 is preferably installed in the tangential direction of the cylindrical swirl flow chamber 10.

The bottom portion of the swirl flow chamber 10 is formed with a solid bottom discharge outlet 14 through which solids are discharged, and a phenomenon in which solids are refloated upward between the solid bottom discharge outlet 14 and the swirl flow chamber 10. The lower baffle 12 is formed to prevent it.

A central shaft 70 is installed at the center of the filter chamber 30 to support the filter cartridge 40 and to receive bubbles when swirl flow is generated, and the filter cartridge 40 is mounted around the central shaft 70. The filter 50 is accommodated in the filter cartridge 40. An upper portion of the filter cartridge 40 is equipped with a weir 42. One side of the filter chamber 30 is formed with a discharge portion 60 to discharge the treated water.

In the upper portion of the filter cartridge 40, a float discharge part 81 and a float trap 80 for discharging the suspended matter in the filtered treatment water are formed. In addition, the upper portion of the filter chamber is formed in the overflow water discharge portion 90 that can be discharged to the outside without passing through the filtering device in case of emergency.

Hereinafter will be described the operation of the non-point source removal device using a hydrodynamic filtration separation method having the configuration as described above.

When the inflow water flows into the swirl flow chamber 10 through the inflow portion 20, as shown in FIG. 2, since the non-point pollutants flow in the tangential direction of the swirl flow chamber 10, the cylindrical swirl flow chamber 10 is opened. Will rotate rapidly. At this time, solids such as particles having a large specific gravity and greater specific gravity than non-point contaminants are separated to the outside by the action of centrifugal force and gravity, and are stacked on the bottom surface and discharged to the outside through the solid bottom discharge port 14. The solids accumulated on the bottom surface may be resuspended by the vortex of the inflow water, and the lower baffle 12 is formed at the lower portion of the swirl flow chamber 10 to prevent such resuspension.

In addition, when the influent rotates, the influent located at the center portion has a force acting upward by the rotational force and bubbles are generated. Therefore, in order to accommodate the upward flow and bubbles and structurally support the filter cartridge, the central axis 70 is provided in the axial direction at the center upper portion of the swirl flow chamber 10.

The filtration device according to the present invention is filtered in a flow-up manner in which the treated water is upward from the bottom, Figures 3a to 3c shows a state diagram of the filter according to the operation of the non-point source removal device. 3A is the initial position. When operating the non-point source removal apparatus according to the present invention, the treated water is filtered from bottom to top as shown by the arrow direction as shown in Fig. 3b. Since the filter medium has a lighter specific gravity than water, the filter medium floats upward due to the upward flow of the treated water, and thus, the thickness of the filter 50 is reduced. In addition, when the operation of the non-point source removal device is stopped, as shown in FIG. 3C, the filter medium is dispersed and the air gap is widened, and the treated water is discharged downward by gravity, thereby partially washing the filter medium in the filter 50. Due to the filter's action mechanism, the filter is partially washed, and thus, the filter according to the present invention has a feature of extending the life and preventing the blocking of the filter, as compared with the conventional filter.

On the other hand, the swirl flow chamber 10 and the filter chamber 30 in accordance with the present invention is a one-piece structure between the flow buffer 16, the diameter gradually decreases toward the lower direction between the bar, the filter chamber 30 ) Is larger than the diameter of the swirl flow chamber 10. Accordingly, as the treated water rises from the swirl flow chamber 10 to the filter chamber 30, the speed of the treated water decreases to more effectively treat the pollutants.

One side of the swirl flow chamber 10 is formed with an inlet 20 through which the inflow water flows, and the inflow portion 20 is preferably attached in a tangential direction to the cylindrical swirl flow chamber 10.

Among the suspended solids in the influent, the large suspended solids that do not pass through the filter 50 are collected on the wall of the chamber by centrifugal force, flowed into the float trap 80 through the float discharge unit 81, and discharged to the outside to provide more effective treatment efficiency. You can get it.

Figure 4 is a block diagram of a non-point source removal apparatus showing a state in which the inflow water overflows in case of emergency. As illustrated in FIG. 4, a overflow water discharge unit 90 may be provided on the upper portion of the filter chamber 30 to protect the facility in the case of clogging the filter, inflow of excess inflow water over the maximum treatment capacity, and other similarities. It is possible to improve the stability of the operation.

The treatment efficiency according to the surface area load ratio of the conventional hydrodynamic separator (HDS) and the filter type separator and the non-point source removal device according to the present invention was tested. Here, the surface load ratio means the ratio of inflow water flowing into the area of the same reactor. The higher the load rate, the more influent water flows, which means that the processing capacity is larger.

% Removal Comparative Example 1 (HDS) maximum 53 at least 21 Average 31 Comparative Example 2 (Filter Method) maximum 69 at least 30 Average 48 Example maximum 80 at least 16 Average 56

Table 1 shows the removal rate of particles having a particle diameter of 90 μm, and the surface area loading rate (m 3 / m 2 / day) is 50 to 430. In FIG. 5, the results are shown graphically. It can be seen that the particle removal rate is higher in the Examples than in the Comparative Examples.

% Removal Comparative Example 1 (HDS) maximum 51 at least 16 Average 31 Comparative Example 2 (Filter Method) maximum 69 at least 12 Average 40 Example maximum 87 at least 26 Average 67

Table 2 shows the removal rate of particles having a particle diameter of 150 μm, and the surface area loading rate (m 3 / m 2 / day) is 100 to 1500. In Fig. 6 the results are shown graphically. It can be seen that the particle removal rate is higher in the Examples than in the Comparative Examples.

According to the non-point source removal apparatus using the hydrodynamic filtration separation method according to the present invention as described above, there is an advantage that the particle separation efficiency of non-point contaminants is improved and the life of the filter is improved.

Further, in the present invention, the swirl flow chamber and the filter chamber are integrally formed in the same container, thereby reducing the required equipment area.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it is possible to make various modifications or variations without departing from the spirit and scope of the invention. Thus, the claims include any such modifications or variations that fall within the spirit of the invention.

1 is a block diagram of a non-point source removal apparatus using a hydrodynamic filtration separation method according to an embodiment of the present invention.

2 is a plan view of a non-point source removal apparatus using a hydrodynamic filtration separation method according to FIG.

3a to 3c is a diagram showing the operation of the filter according to the operation of the non-point source removal apparatus using the present hydraulic filtration separation method.

Figure 4 is a block diagram of a non-point source removal apparatus showing a state in which the inflow water overflowed in case of emergency.

5 is a graph showing the removal rate of particles having a particle diameter of 90 μm.

6 is a graph showing the removal rate of particles having a particle diameter of 150 μm.

* Explanation of symbols on the main parts of the drawing

10: swirl flow chamber

12: lower baffle

14 solid bottom discharge outlet

16: flow velocity buffer

20: inlet

30: filter chamber

40: filter cartridge

42: leaked software

50: filter

60: discharge part

70: central axis

80: Float Trap

81: float discharge outlet

90: overflow water discharge part

Claims (6)

A cylindrical swirl flow chamber for rotating the influent; An inlet formed on one side of the swirl flow chamber and inflowing water; A filter chamber extending from the swirl flow chamber and formed above the swirl flow chamber; A filter cartridge mounted inside the filter chamber; A filter accommodated in the filter cartridge; A discharge part formed at one side of the filter chamber and discharged from the treated water; A float trap installed on one side of the filter chamber to discharge the float in the inflow water to the outside; And Non-point source removal apparatus using a hydrodynamic filtration separation method, characterized in that it is formed on the upper edge of the filter chamber, the overflow water discharge portion for overflowing the influent in case of emergency. 2. The apparatus of claim 1, wherein a lower baffle is formed under the swirl flow chamber to prevent resuspension of the treated solids. The apparatus of claim 1, wherein the inlet is installed in a tangential direction of a cylindrical swirl flow chamber. According to claim 1, Between the swirl flow chamber and the filter chamber is formed integrally with the flow rate buffer portion is gradually reduced in diameter toward the lower direction, the diameter of the filter chamber is formed larger than the diameter of the swirl flow chamber Non-point source removal device using a hydrodynamic filtration separation method, characterized in that. 2. The hydrodynamic filtration according to claim 1, wherein a center axis of the filter chamber is formed in the axial direction to accommodate upward flow and bubbles generated in the swirl flow chamber and support the filter cartridge. Non-point source removal device using separation method. The filter of claim 1, wherein the filter is filtered in an upflow manner, and when the non-point source removal device using the hydrodynamic filtration method is stopped, the treated water is discharged downward by gravity to partially wash the media in the filter. Non-point source removal device using a hydrodynamic filtration separation method, characterized in that.