KR20210044512A - Rainwater treatment system - Google Patents

Abstract

The present invention relates to a rainwater treatment system capable of maintaining good rainwater treatment performance for a long time due to excellent cleaning efficiency for a filter because it is possible to wash the filter while vibrating the entire filter evenly without generating debris such as microplastics. The rainwater treatment system comprises: a foam metal filter installed in a filtration tank and filtering suspended matters contained in the rainwater flowing from a pretreatment tank; and a water spray means disposed on the foam metal filter and having a backwash nozzle for discharging the suspended matters contained in the foam metal filter to a upstream space of the foam metal filter by spraying water toward the foam metal filter.

Description

Rainwater treatment system

The present invention relates to a rainwater treatment system for discharging purified rainwater by removing solids from initial rainwater and filtering suspended matter.

In general, water pollutants are classified into point pollutants and non-point pollutants, and point pollutants such as domestic sewage, livestock wastewater, or industrial wastewater discharged from point pollutants whose discharge points and discharge routes are determined are easy to treat. The effect of the season is small, so it is possible to predict the amount of occurrence throughout the year, so the design and maintenance of the treatment facility is easy.

On the other hand, non-point source pollutants are not uniform in discharge areas, discharge routes, and discharges, but remain on a wide surface of the surface, and in case of rain, they flow into public waters or groundwater such as rivers, ports, and lakes together with rainwater, causing water pollution. Since the amount of generation is not constant, it is difficult to design and maintain treatment facilities and to treat pollutants.

As one of the conventional rainwater treatment facilities for treating rainwater containing non-point pollutants, a polyurethane foam filter was used in the registered patent publication of Registration No. 10-1160179 (invention name: rainwater treatment machine, inventor: Shim Young-il et al. 3). It is disclosed to filter foreign matter contained in rainwater. However, since the invention of Shim Young-il et al. uses a filter made of polyurethane foam, the polyurethane foam is crushed due to the hardening of the filter during long-term use, causing a problem of contaminating rainwater with fine plastics.

In addition, when the performance of the filter deteriorates due to the deterioration of the filter performance due to the deterioration of the filter due to the suspended matters such as soil contained in the rainwater over time, there is an inconvenience of having to separate the filter and wash it in order to remove the foreign matter filtered by the filter.

In addition, since it is difficult to remove foreign substances such as floating matters filtered by the filter only by washing with water, the filter made of conventional polyurethane foam must be washed by repeating the process of spraying water on the filter and then compressing and expanding the filter. It is necessary to install large equipment.

It is an object of the present invention to provide an excellent treatment system capable of cleaning filters without large equipment for compressing the filters.

Another object of the present invention is to provide an excellent treatment system that can prevent generation of fine plastics due to hardening of the filter, and can effectively remove floating matters filtered by the filter, so that it can be used for a long time and is easy to maintain and repair.

The rainwater treatment system according to the present invention includes a pretreatment tank in which a pretreatment process for filtering out solids contained in rainwater introduced through a rainwater inlet pipe and sedimentation is performed, and a filtering process for rainwater containing suspended matters that have undergone the pretreatment process is performed. In a rainwater treatment system for sending rainwater from which floating matters have been removed to a rainwater drainage pipe, the rainwater treatment system provided with a filtration tank, which is installed on the moving path of the rainwater between the pretreatment tank and the rainwater drain pipe, and contains floating matter contained in the rainwater flowing from the pretreatment tank. Foam metal filter for filtering; And a backwash nozzle disposed on the foamed metal filter and spraying water toward the foamed metal filter to discharge the floating matter contained in the foamed metal filter into the space upstream of the foamed metal filter. It has a composition that includes means.

The bottom of the filtration tank may be formed to be bent or an auxiliary wall may be formed at intervals.

Vibrating means combined with the foamed metal filter to form a vibration filter module together with the foamed metal filter; And a control panel configured to operate the vibrating means to vibrate the foamed metal filter while operating the water spraying means to spray water through the backwash nozzle to wash the foamed metal filter.

It is preferable to include a washing tank installed adjacent to the filtration tank to store the rainwater filtered in the filtration tank and supply it to the water spraying means to be used as washing water for the foamed metal filter.

A first wall is installed between the filtration tank and the pretreatment tank, a second wall is installed between the filtration tank and the washing tank, and an inlet through which rainwater from the pretreatment tank flows into the filtration tank is installed at a lower end of the first wall. , The foamed metal filter may be installed obliquely facing the inlet.

Occasionally, a first wall is installed between the filtration tank and the pretreatment tank, a second wall is installed between the filtration tank and the washing tank, and an inlet through which the rainwater of the pretreatment tank flows into the filtration tank at a lower end of the first wall. Is installed, and the foamed metal filter may be installed between the first wall portion and the second buck portion above the inlet.

The foamed metal filter may be bent or have an uneven surface or have an egg plate shape.

Preferably, the metal foam filter includes a first metal foam filter and a second metal foam filter layered on the first metal foam filter, and the vibration means comprises the first metal foam filter and the first metal foam filter. 2 An ultrasonic vibrator that is inserted between the foamed metal filters and vibrates when power is applied is preferable, and the first foaming metal filter and the first foaming metal filter are preferably integrally coupled through a frame.

It is preferable that the pores of the second foamed metal filter facing the backwashing nozzle are larger than the pores of the first foamed metal filter opposite the backwashing nozzle.

The first foamed metal filter has a small pore size of about 20 to 60 PPI and a porosity of 70 to 90%, and the second foamed metal filter has a pore size of 10 to 40 PPI, which is larger than the first foamed metal filter, and has a porosity of 80. It is preferably ~98%.

The vibration filter module may include the foamed metal filter, a frame holding the foamed metal filter, and an ultrasonic vibrator installed in the frame.

The foamed metal filter is preferably made of stainless steel or aluminum.

It is preferable that a rubber cap is installed at the outer end of the ultrasonic vibrator.

It is preferable that an elastic material is installed on the outer surface of the frame.

In some cases, an elastic material may be installed at the end of the foamed metal filter.

It is installed adjacent to the filtration tank and includes a washing tank for storing the rainwater filtered in the filtration tank and supplying it to the water spraying means so that it can be used as washing water for the foamed metal filter, and between the filtration tank and the pretreatment tank. One wall is installed, a second wall is installed between the filtering tank and the washing tank, and the foamed metal filter may be installed inclined at an upper end of the second wall.

The inventor of the present invention initially studied washing by vibrating a filter made of polyurethane foam and spraying the washing water through a filter made of polyurethane foam, but since the polyurethane foam absorbs vibration due to its high elasticity, the vibration is uniform throughout the filter. It was found that there was a problem that was not transmitted properly, and to solve this problem, by using a foam metal filter instead of a filter made of polyurethane foam, it was possible to solve all the problems caused by using a filter made of polyurethane foam.

In other words, according to the present invention, unlike a filter made of resin such as polyurethane foam, it is possible to clean the foamed metal filter while vibrating because it has a high strength and a vibration is transmitted well. I can keep it.

According to the present invention, there is no need for a separate large equipment for crimping the filter.

According to the present invention, even if it is used for a long period of time, debris such as fine plastics does not occur.

1 is a plan layout diagram for explaining an example of a rainwater treatment system according to the present invention,
2 is a cross-sectional view showing a cross-sectional configuration of a pretreatment tank, a filtration tank, and a washing tank according to the present invention, and a connection relationship between a storm water inlet and a storm water outlet;
Figure 3 is a partial enlarged view showing the installation state of the vibration means,
4 is a cross-sectional view showing a modified example of the excellent treatment system of FIG. 2;
5 is a cross-sectional view showing another example of the rainwater treatment system according to the present invention;
6 is a perspective view showing another example of a vibration filter module that can be suitably used in the rainwater treatment system according to the present invention;
7 is an enlarged cross-sectional view taken along JJ of FIG. 6;
8 is a perspective view showing a modified example of the vibration filter module shown in FIG. 6;
9 and 10 are cross-sectional views showing still another example of a vibration filter module;
11 and 12 are cross-sectional views each showing another example of the rainwater treatment system according to the present invention.

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

1 is a plan layout diagram for explaining an example of a rainwater treatment system according to the present invention, and FIG. 2 is a cross-sectional view showing a cross-sectional configuration of a pretreatment tank, a filtration tank, and a washing tank according to the present invention, and a connection relationship between a rainwater inlet and a rainwater outlet. , Figure 3 is a partial enlarged view showing the installation state of the vibration means.

1 and 2 show the storm water pipe 10, the storm water pipe 10 is purged by the storm water inlet 11 installed with overflow weir 12 and the storm water treatment system 100 according to the present invention. Rainwater discharge section 14 is installed to discharge the water.

The rainwater from the stormwater inlet 11 is introduced into the stormwater treatment system 100 according to the present invention through the stormwater inlet pipe 13, is purified, and then discharged to the stormwater discharge section 14 through the stormwater discharge pipe 15.

As shown in Figs. 1 to 3, the rainwater treatment system 100 according to the present invention filters the solids contained in the rainwater introduced through the rainwater inlet pipe 13 and the pretreatment tank 110 in which a pretreatment process for sediment is performed. ), the pretreatment tank 110 has a filtering tank 130 in which a filtering process for rainwater containing suspended matter is performed, which has undergone a pretreatment process. Preferably, a washing tank 150 is installed next to the filtering tank 130 to store some of the rainwater that has undergone a filtration process and then use it as washing water for washing the foamed metal filter 201 to be described later. The washing tank 150 is installed adjacent to the filtering tank 130 on the opposite side of the pretreatment tank 110 with the filtering tank 130 as the center.

The pretreatment tank 110 is separated from the filtering tank 130 through a first wall W1, and the filtering tank 130 is separated from the washing tank 150 through a second wall W2. An inlet 120 through which rainwater pretreated in the pretreatment tank 110 flows into the filtration tank 130 is installed at the lower end of the first wall W1.

The pretreatment tank 110 is divided into a first pretreatment tank 110a and a second pretreatment tank 110b through a partition wall 111. The first pretreatment tank 110a serves to filter out large-sized solids and primarily precipitate precipitates having a relatively large specific gravity. The first pretreatment tank 110a contains a screen facility 112 for filtering large-sized solids such as wooden sticks from the rainwater flowing through the rainwater inlet pipe 13 and the sediment contained in the rainwater and then precipitated first. A first sludge pump 113 for pumping up is installed.

The second pretreatment tank (110b) is for secondary precipitation of the precipitation of relatively small specific gravity contained in the rainwater flowing through the partition wall 111 after the first precipitation process in the first pretreatment tank (110a). will be. In the second pretreatment tank 110b, a second sludge pump 114 is installed to pump up the sediment contained in the rainwater that has undergone the first precipitation process and then precipitated secondarily.

A manhole 115 with a manhole cover 116 installed on the pretreatment tank 110 is formed, and a footrest 117 is installed on the wall of the pretreatment tank 110 at intervals up and down to allow the operator to step on the foot.

The rainwater treatment system 100 according to the present invention includes a foamed metal filter 201 installed in the filtration tank 130. The foamed metal filter 201 is installed on the moving path of the rainwater between the pretreatment tank 10 and the rainwater drainage pipe 15 to prevent foreign matter, ie, floating matter, such as floating soil contained in the rainwater flowing from the pretreatment tank 110. It is intended to be finally filtered and discharged.

The foamed metal filter 201 is an open-cell foamed metal and has an innumerable pores 202 therein, and preferably, it is most preferable to foam stainless steel made of a nickel-based alloy, and in some cases, foamed aluminum may be used. have. The open-cell foamed metal has a very large surface area ratio per unit volume, ultra-lightweight, high strength, and good machinability. The porosity of the metal foam filter 201 may be 70 to 98%, preferably 70 to 90%. In some cases, the foamed metal filter 201 may be used in combination with a porosity of 70 to 90% and a porosity of 80 to 98%.

The foamed metal filter 201 shown in FIGS. 1 and 2 has a hat-shaped cross-sectional shape with a central portion bent upwards than both ends, and the first upper portion of the inlet 120 so as to cover the entire area of the filtration tank 130 It is installed between the wall portion W1 and the second buck portion W2.

Accordingly, the filtration tank 130 is filtered through the upper space under the foamed metal filter 201 and the foamed metal filter 201 in which rainwater that does not go through the filtration process by the foamed metal filter 201 as described above stays. It is divided into a downstream space above the foamed metal filter 201 where rainwater stays.

Preferably, as shown in FIG. 3, a filter mounting portion (M) is previously installed in the first wall portion (W1) and the second wall portion (W2) so that the end portions of the foamed metal filter 201 can be inserted and mounted. Preferably, the foamed metal filter 201 is installed on the first wall portion W1 and the second buck portion W2 through the filter mounting portion M with the elastic material 209 interposed at the end thereof. The elastic material 209 serves to allow the foamed metal filter 201 to vibrate in a large width by buffering the shock during vibration by the vibration means 203 and amplifying the vibration. Do it.

Preferably, the metal foam filter 201 is provided with a vibration means 203 which is combined with the metal foam filter 201 and constitutes the vibration filter module 200 together with the metal foam filter 201. As the vibrating means 203, an ultrasonic vibrator that is inserted and installed into the foamed metal filter 201 and vibrates when power is applied is preferable. Referring to FIG. 3, a rubber cap 205 is installed at an outer end of a vibrating means 203 composed of an ultrasonic vibrator or the like. The rubber cap 205 buffers an impact force acting on the vibration means 203 composed of an ultrasonic vibrator, etc., and allows a large vibration to be applied to the foamed metal filter 201.

The rainwater treatment system 100 according to the present invention has a water spraying means 170. Preferably, the water spraying means 170 is disposed on the foamed metal filter 201 and sprays water toward the foamed metal filter 201, filtered through the foamed metal filter 201, and suspended from the foamed metal filter 201. A backwash nozzle 171 for discharging the foamed metal filter 201 to the space upstream of the foamed metal filter 201 and a pump 173 and a pump 173 for pumping up water from the washing tank 150 ) And a washing water transfer pipe 175 installed between the backwash nozzle 171.

The excellent treatment system 100 according to the present invention vibrates the foam metal filter 201 by supplying power to the vibrating means 203 by operating the vibrating means 203, and also supplying power to the pump 173 to pump power. The control panel 180 is provided with switches for backwashing the foamed metal filter 201 by operating the water spraying means 170 by driving 173 and spraying water to the backwashing nozzle 171. do. The control panel 180 is provided with first and second sludge pumps 113 and 114, a vibration means 203, and a switch for operating the pump 173.

A manhole 151 in which a manhole cover 152 is installed for an operator's entry and exit for internal inspection is formed on the washing tub 150, and a footrest 153 is provided on the wall of the washing tub 150 so that the operator can step on it. It is installed at intervals.

A process in which rainwater is treated in the rainwater treatment system 100 shown in FIGS. 1 and 2 will be described as follows.

Rainwater flowing along the storm water pipe 10 is introduced into the pretreatment tank 110 through the storm water inlet pipe 13 from the storm water inlet 11, and large-sized solids are filtered by the screen facility 112. The sediment having a relatively large specific gravity contained in the rainwater flowing into the first pretreatment tank 110a is precipitated in the first pretreatment tank 110a. When the first pretreatment tank 110a is filled with rainwater, the rainwater at the upper end passes through the partition wall 111 and is supplied to the second pretreatment tank 110b.

In the second pretreatment tank 110b, when water is filled above the settling portion while passing through a process in which a precipitate having a relatively small specific gravity is settled in the concave settling portion of the bottom, the superiority of the second pretreatment tank 110b is the first wall portion W1. It is introduced into the filtration tank 130 through the inlet 120 at the bottom. As the rainwater flows into the filtering tank 130 and the rainwater is filled in the filtering tank 130, the rainwater is filtered through the metal foam filter 201 in the upstream space under the metal foam filter 201 to filter the suspended matter contained in the rainwater. After passing through, it moves to the downstream space above the foamed metal filter 201 and is supplied to the washing tank 150 through the upper end of the second wall W2, some of which is stored in the washing tank 150, and the rest is through the rainwater discharge pipe 15. It is discharged to the rainwater discharge section 14 of the rainwater pipe (10).

In the process of treating rainwater by the above process, solids and sludge accumulate in the screen facility 112, the first pretreatment tank 110a and the second pretreatment tank 110b, and the filtered floating matter accumulates in the foamed metal filter 201. The screen facility 112, the first pretreatment tank 110a, the second pretreatment tank 110b, and the foamed metal filter 201 should be cleaned regularly or as needed.

The solid matter of the screen facility 112 is cleaned by an operator entering the manhole 117, and the stagnant water in the first pretreatment tank 110a and the second pretreatment tank 110b including sludge is the first sludge pump 113 ) And the second sludge pump 114 to be discharged to the outside.

In the washing of the metal foam filter 201, after subtracting rainwater from the filtration tank 130, the vibration means 203 is driven to vibrate the metal foam filter 201 and the pump 173 is driven. Accordingly, the purified rainwater in the washing tank 150 is sprayed toward the foamed metal filter 201 vibrating through the backwashing nozzle 171, and the suspended matter hung in the foamed metal filter 201 is the foamed metal filter 201 ) And is discharged to the pretreatment tank 110, falling into the upstream space below the filtration tank 130 along with rainwater.

In the present invention, since the foamed metal filter 201 is washed by spraying rainwater while vibrating the foamed metal filter 201, floating matter can be removed cleanly, and since the foamed metal having high strength is used as a filter material, vibration is prevented. (201) It is delivered evenly to the whole, and even if it is used for a long period of time, there is no debris caused by hardening.

4 is a cross-sectional view showing a modified example of the excellent treatment system of FIG. 2.

Referring to FIG. 4, the foamed metal filter 201 may be formed in which irregularities 207 are formed on the surface instead of a plate-shaped one in a curved shape. In this way, the surface area of the foamed metal filter 201 can be increased, thereby increasing the filtration performance for floating matter.

The rest are the same as described with reference to FIGS. 1 to 3.

Referring to FIGS. 1 to 4 above, it can be seen that the shape of the foamed metal filter 201 may be modified and used in various forms such as an egg plate shape in addition to those shown in FIGS. 1 to 4.

5 is a cross-sectional view showing another example of the rainwater treatment system according to the present invention.

In some cases, the foamed metal filter 201 may be installed inclined to face the inlet 120 in the filter tank 130. That is, one end of the foamed metal filter 201 is supported by the first wall portion W1, and the other end is supported by the bottom of the filtration tank 130 to filter the floating matter contained in the rainwater flowing through the inlet 120. . At the bottom of the first wall portion W1 and the filter tank 130, a support portion 133 for supporting the end of the foamed metal filter 201 may be formed to protrude inward, and in some cases, may be formed in a concave groove shape. It might be possible.

The rest are the same as described through FIGS. 1 to 3.

6 is a perspective view showing another example of a vibration filter module that can be suitably used in the stormwater treatment system according to the present invention, and FIG. 7 is an enlarged cross-sectional view taken along J-J of FIG. 6. It will be described with reference to FIGS. 1 and 2 together.

6 and 7, the vibration filter module 200 according to the present invention includes a metal foam filter 201 in which a first metal foam filter 201a and a second metal foam filter 201b are overlapped, and a vibration means. It is configured with 203 and a frame 208.

The first metal foam filter 201a and the second metal foam filter 201b overlap each other in a layered state while being supported by a frame 208 disposed along the edge. An elastic material 209 such as rubber may be installed on the outer surface of the frame 208 so that it can be elastically supported in a place where it is installed. The pores 202 of the second foamed metal filter 201b on the upper side facing the backwashing nozzle 171 are larger than the pores 202 of the first foamed metal filter 201a opposite the backwashing nozzle 171. When the vibration filter module 200 is configured in this way, the water sprayed from the backwash nozzle 171 is relatively large of the first foamed metal filter 201a through the relatively large pores 202 of the second foamed metal 201b. It is delivered evenly and smoothly to the small pores 202, and the water supplied to the relatively large pores 202 of the second foamed metal 201b is applied to the first foamed metal filter 201a by the force of gravity and vibration. Cleaning efficiency can be improved by applying a large hydraulic pressure to water existing in the relatively small pores 202. Here, the size of the pores of the first foamed metal filter 201a is suitably small, such as from 20PPI to 60PPI, and the porosity of the first foamed metal filter 201a is preferably 70 to 90%. And the size of the pores 202 of the second foamed metal filter 201b is about 10 to 40 PPI, but larger than the pores of the first foamed metal filter 201a, and the porosity of the second foamed metal filter 201b is It is preferably 80 to 98%.

The frame 208 serves to integrally hold the first foamed metal filter 201a and the second foamed metal filter 201b while receiving and protecting the inside. The vibrating means 203 is inserted and mounted between the first foamed metal filter 201a and the second foamed metal filter 201b. As the vibrating means 203, an ultrasonic vibrator having a circular cross section that vibrates radially at 360 degrees when power is applied is suitable. When a part of the vibrating means 203 is installed to protrude outward, a rubber cap 205 is preferably installed at the protruding part of the vibrating means 203. The rubber cap 205 allows the vibrating means 203 to vibrate smoothly, and prevents the vibrating means 203 from being damaged by the vibration. Reference numeral 206 is denoted by omitting the electric wire for supplying power to the vibrating means 203.

An elastic material 209 may be preferably installed on the outer surface of the frame 208. The elastic material 209 allows the frame 208 and the first foamed metal filter 201a and the second foamed metal filter 201b mounted inside the frame 208 to vibrate smoothly, so that the first foamed metal filter ( 201a) allows the floating material to fall off and be easily discharged to the outside.

8 is a perspective view showing a modified example of the vibration filter module shown in FIG. 6.

In some cases, a connecting portion 208a connecting the upper and lower sides of the frame 208 is installed in the left and right central portions of the frame 208, and the vibration means 203 is fixed to the connecting portion 208a, so that the vibration filter module 200 Can be configured. And, in the drawings of the embodiments described so far, it is mainly illustrated that one vibrating means 203 is installed on each side of the filter or one is installed in the left and right central portions of one side of the filter, but the installation of the vibrating means 203 The number and installation position may vary depending on the size of the foamed metal filter 201 or the first and second foamed metal filters 201a and 201b, the type of the vibration means 203, the installation location of the vibration filter module 200, etc. , Several vibrating means may be installed in one filter. In addition, it goes without saying that the vibrating means 203 may be attached to the outer surface of the frame 208 to be exposed to the outside.

As shown in Fig. 8, when the vibrating means 203 is fixed to the frame 208, the vibrating means 203 vibrates the frame 208 so that the first foamed metal filter constituting the foamed metal filter 201 ( 201a) and the second foamed metal filter 201b may be vibrated. The rest is the same as described with reference to FIGS. 6 and 7.

In addition, in Figs. 6 to 8, two types of foamed metal filters having different pore sizes have been exemplified and described, but three or more types of foamed metal filters having different pore sizes may be overlapped in three or more stages. , The metal foam filter 201 may be configured by attaching a metal foam filter having a large pore to the upper and lower surfaces of the metal foam filter having a small pore disposed in the center.

In addition, the vibration filter module 200 shown in FIGS. 6 to 8 is installed with the second foamed metal filter 201b having large pores facing downward and the first foaming metal filter 201a having small pores facing upward. Of course you can.

9 and 10 are cross-sectional views showing still another example of the vibration filter module.

In some cases, the foamed metal filter 201 of the vibration filter module 200 may be bent in a step shape as shown in FIG. 9 or may be bent in an arc shape as shown in FIG. 10.

The edge of the foam metal filter 201 is coupled to the frame 208, the frame 208 is equipped with a vibration means 203 such as an ultrasonic vibrator, and an elastic material 209 is coupled to the outer surface of the frame 208 have.

The vibration filter module 200 shown in FIGS. 9 and 10 is suitable as a substitute for the vibration filter module 200 shown in FIG. 5.

11 and 12 are cross-sectional views each showing another example of the rainwater treatment system according to the present invention.

In some cases, the foamed metal filter 201 may be installed at an upper end of the second wall W2 so as to be inclined to increase gradually as it goes toward the first wall W1. In this case, the backwash nozzle 171 is also preferably installed inclined to spray water toward the foamed metal filter 201.

In addition, on the bottom of the filtering tank 130, as shown in FIG. 11, a bent portion 135 that is bent vertically at a position lower than that of the first wall W1 and the second wall W2 is formed, or as shown in FIG. Auxiliary walls 136 lower than the first wall W1 and the second wall W2 may be installed so that floating matter such as soil included in the rainwater sinks to the bottom once more to settle.

The rest are the same as described earlier.

The present invention can be suitably used to treat initial rainwater containing non-point pollutants, and in particular, it can be suitably used to install rainwater treatment facilities that need to maintain good treatment performance for a long period of time because the filter can be efficiently cleaned. There is a possibility.

100: excellent treatment system 110: pretreatment tank
120: inlet 130: filtration tank
150: washing tank 170: water spraying means
171: backwash nozzle 173: pump
175: washing water transfer pipe 180: control panel
200: vibration filter module 201: foam metal filter
201a: first foamed metal filter 201b: second foamed metal filter
202: pore 203: vibrating means
205: rubber cap 208: frame
209: elastic material

Claims (15)

A pretreatment tank in which a pretreatment process for filtering out solids contained in the rainwater introduced through the rainwater inlet pipe is carried out and a pretreatment process for sedimentation is performed, and a filtering tank in which the filtering process for rainwater containing suspended matters passed through the pretreatment process is provided. In the rainwater treatment system for sending rainwater to the stormwater drainage pipe,
A metal foam filter installed on the moving path of the rainwater between the pretreatment tank and the rainwater drain pipe to filter the floating matter contained in the rainwater flowing from the pretreatment tank; And
Water spraying means disposed on the foamed metal filter and having a backwash nozzle for spraying water toward the foamed metal filter to discharge the suspended matter contained in the foamed metal filter into a space upstream of the foamed metal filter Excellent treatment system comprising a. The rainwater treatment system of claim 1, wherein the bottom of the filtration tank is formed to be bent or an auxiliary wall is formed at intervals. The method of claim 1, further comprising: a vibration means combined with the foamed metal filter to form a vibration filter module together with the foamed metal filter; And
And a control panel configured to operate the vibration means to vibrate the foamed metal filter while operating the water spraying means to spray water through the backwash nozzle to wash the foamed metal filter. . The rainwater according to claim 1, further comprising a washing tank installed adjacent to the filtration tank to store the rainwater filtered in the filtration tank and supply it to the water spraying means so that it can be used as washing water for the foamed metal filter. Processing system. The method of claim 4, wherein a first wall is installed between the filtration tank and the pretreatment tank, and a second wall is installed between the filtration tank and the washing tank,
An inlet through which rainwater from the pretreatment tank flows into the filtration tank is installed at a lower end of the first wall,
The metal foam filter is a rainwater treatment system, characterized in that installed obliquely facing the inlet. The method of claim 4, wherein a first wall is installed between the filtration tank and the pretreatment tank, and a second wall is installed between the filtration tank and the washing tank,
An inlet through which rainwater from the pretreatment tank flows into the filtration tank is installed at a lower end of the first wall,
The metal foam filter is a rainwater treatment system, characterized in that installed between the first wall portion and the second buck portion above the inlet. The excellent treatment system according to claim 1, wherein the foamed metal filter is bent or has an uneven surface or an egg plate shape. The metal foam filter of claim 3, wherein the metal foam filter comprises a first foam metal filter and a second foam metal filter layered on the first foam metal filter, and the vibration means comprises the first foam metal filter and An ultrasonic vibrator that is inserted between the second foamed metal filters and vibrates when power is applied, and the first foaming metal filter and the first foaming metal filter are integrally coupled through a frame. The excellent treatment system of claim 8, wherein pores of the second foamed metal filter facing the backwash nozzle are larger than pores of the first foamed metal filter opposite the backwash nozzle. The method of claim 9, wherein the first foamed metal filter has a pore size of 20 PPI to 60 PPI and a porosity of 70 to 90%, and the second foam metal filter has a pore size of 10 to 40 PPI. Excellent treatment system, characterized in that the porosity is greater than the porosity of 80-98%. 4. The excellent treatment system of claim 3, wherein the vibration filter module includes the foamed metal filter, a frame holding the foamed metal filter, and an ultrasonic vibrator installed in the frame. The excellent treatment system of claim 1, wherein the foamed metal filter is made of stainless steel or aluminum. The rainwater treatment system according to claim 8 or 11, wherein a rubber cap is installed at an outer end of the ultrasonic vibrator. The rainwater treatment system according to claim 8 or 11, wherein an elastic material is installed on the outer surface of the frame. The method of claim 2, comprising a washing tank installed adjacent to the filtration tank and configured to store the rainwater filtered in the filtration tank and supply it to the water spraying means to be used as washing water for the foamed metal filter,
A first wall is installed between the filtration tank and the pretreatment tank, and a second wall is installed between the filtration tank and the washing tank,
The metal foam filter is an excellent treatment system, characterized in that installed inclined to the upper end of the second wall.

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