KR20210072430A - Apparatus for treating rainwater - Google Patents

Abstract

The present invention relates to an apparatus for treating rainwater. According to an embodiment of the present invention, the apparatus for treating rainwater comprises: a first treatment tank including a screen filtering rainwater entering through an inlet and a first pump unit discharging internal rainwater and sediment; a second treatment tank re-filtering rainwater filtered in the first treatment tank; and a water tank storing treatment water which is the rainwater filtered by the first treatment tank and the second treatment tank. The second treatment tank includes: a bottom unit; a filter unit arranged above the bottom unit to be separated to re-filter the rainwater filtered in the first treatment tank; a feeder transporting foreign substances accumulated on the bottom unit to gather the foreign substances; and a second pump unit discharging the foreign substances gathered by the feeder. Accordingly, the apparatus for treating rainwater effectively disposes of foreign substances of the second treatment tank to facilitate maintenance and repair while continuously maintaining foreign substances disposal performance.

Description

Rainwater treatment equipment {APPARATUS FOR TREATING RAINWATER}

The embodiment relates to a rainwater treatment device. In detail, it relates to a rainwater treatment apparatus capable of continuously maintaining treatment performance by treating foreign substances deposited therein as non-point pollutants contained in rainwater are filtered.

In general, the initial rainfall (precipitation of about 5 mm) that occurs during rainfall or heavy rain flows through the ground surface and sewer pipes, and flows through a wide range of ground surfaces such as roads, farmland, parking lots, industrial complexes, commercial areas, residential areas, bridges, construction sites, and yards. It contains high concentrations of non-point pollutants such as silt, oil, contaminants, heavy metals, pathogenic microorganisms, organic compounds, radioactive materials, livestock excreta, and untreated livestock wastewater accumulated in the river and flows directly into the river. It causes serious problems of disturbance and destruction.

Recently, as the degree of pollution by non-point pollutants has been confirmed by various indicators, the treatment of non-point pollutants is emerging as an important environmental problem, and there are various ways to overcome water pollution caused by non-point pollutants generated from these non-point pollutants. Methods, devices and equipment are being proposed. Here, the non-point source of pollution may be a place or area that generates pollution through an unspecified discharge route, such as a farm, yard, agricultural land drainage, pasture, forest, construction site, mine, waste treatment plant, or landfill site.

As such devices and facilities, there are artificial structures such as wetlands or reservoirs that purify and discharge non-point pollutants introduced together with rainwater through several stages, baffle-type treatment facilities, and screen-type treatment facilities.

In particular, the baffle-type treatment facility and the screen-type treatment facility cannot expect great efficiency in removing various types of non-aqueous contaminants floating in the treatment facility such as soluble contaminants other than solids, oil components, etc. There is a problem in that the function is often paralyzed as sediments such as soil and sludge are deposited because it cannot be properly dealt with. In addition, there are many difficulties in maintenance, such as the need to frequently clean the inside and the need to periodically replace the filter due to the adverse effects of the sediment interfering with the flow path of the sewage pipe.

As an invention related to this, there is a Korean Patent Registration No. 10-1181863 (September 5, 2012) entitled 'Initial rainwater treatment device capable of unmanned automatic control'.

1 is a view showing an initial rainwater treatment device capable of unmanned automatic control.

Referring to FIG. 1 , the initial rainwater treatment device 2 capable of unattended automatic control filters rainwater with a filter and uses high-pressure air to separate foreign substances from the filter, thereby reducing maintenance costs.

However, there is a problem in that foreign substances generated during washing of the filter adhere to the floor and the like, impairing the performance of foreign substances handling. Furthermore, due to the location of the filter, it is difficult for an operator to directly enter and remove the foreign material.

In addition, since only air is used to clean the filter, a method capable of facilitating the transport of foreign substances while further improving the cleaning power of the filter is also required.

The embodiment uses a screw-type feeder and the structure of the bottom part to facilitate the treatment of foreign substances generated by filtration and washing of the filter, thereby continuously maintaining the processing performance of foreign substances and convenient maintenance. provide the device.

The embodiment provides a water washing system using water filtered by a filter (hereinafter referred to as 'treated water') for washing the filter, thereby improving the washing power of the filter and reducing maintenance costs. do.

The embodiment provides a rainwater treatment device capable of treating the foreign material even in a dry state inside the facility by removing the foreign material adhering to the floor using the treated water and transferring the foreign material using the feeder.

The problem to be solved by the present invention is not limited to the problems mentioned above, and other problems not mentioned here will be clearly understood by those skilled in the art from the following description.

The task is a first treatment tank including a screen for filtering rainwater introduced through the inlet and a first pump unit for discharging rainwater and sediments inside; a second treatment tank for re-filtering the rainwater filtered in the first treatment tank; and a water tank for storing the treated water, which is rainwater, filtered by the first treatment tank and the second treatment tank, wherein the second treatment tank is disposed at a bottom portion and spaced apart from the upper side of the bottom portion in the first treatment tank It is achieved by a rainwater treatment device including a filter unit for re-filtering the filtered rainwater, a feeder for transferring and collecting foreign substances accumulated in the bottom to one side, and a second pump unit for discharging the foreign substances collected by the feeder.

Here, the bottom part includes a first groove in which the feeder is disposed, an inclined surface formed to have a predetermined inclination angle θ to guide foreign substances into the first groove, and a second groove in which foreign substances moving by the feeder are accumulated. may include

Alternatively, the bottom portion may include an inclined surface formed to have a predetermined inclination angle θ, and a second groove in which foreign substances moving by the feeder are accumulated.

In addition, the cover part disposed in the water tank includes a plate and a plurality of drain pipes passing through the plate, and the drain pipe filters rainwater filtered by the filter part and discharges the treated water to the lower part of the plate. have.

In addition, the rainwater treatment device further includes an air washing device for washing the inside of the second treatment tank using air, the air washing device includes an air blower; a first duct connected to the air blower; a first nozzle disposed in the first duct to spray air toward the filter unit; and a second nozzle disposed in the first duct to spray air toward the floor.

Here, the air washing device may further include a second duct connected to the air blower, and one side of the second duct may be connected to the feeder.

And, the feeder includes a pipe to which the second duct is connected, a blade forming a shape of a screw on the outer circumferential surface of the pipe, and a hole formed in the pipe, and moves into the pipe through the second duct. Air may be injected to the blade through the hole.

On the other hand, the rainwater treatment device further includes a water washing device for washing the inside of the second treatment tank using the treated water, the water washing device includes a third pump, a third pipe connected to the third pump, A plurality of third nozzles disposed in the third pipe to spray treated water toward the filter unit, a fourth pipe connected to the third pump, and a fourth pipe disposed in the fourth pipe to spray the treated water toward the bottom It may include a plurality of fourth nozzles.

The task is a first treatment tank including a screen for filtering rainwater introduced through the inlet and a first pump unit for discharging rainwater and sediments inside; a second treatment tank for re-filtering the rainwater filtered in the first treatment tank; a water tank for storing the treated water of rainwater filtered by the first treatment tank and the second treatment tank; an air cleaning device for spraying air on foreign substances inside the second treatment tank; and a water washing device for recycling the treated water of the water tank to wash foreign substances inside the second treatment tank.

The rainwater treatment apparatus according to the embodiment uses a screw-type feeder and the structure of the bottom portion to facilitate the treatment of foreign substances in the second treatment tank, thereby facilitating maintenance while continuously maintaining the processing performance of foreign substances. .

In addition, the rainwater treatment apparatus reuses treated water, which is filtered water, to improve the washing ability of the second treatment tank and to reduce the cost of treating foreign substances. For example, by performing water washing of the filter unit in a dry state inside the facility and spraying water on the floor, it is possible to improve the cleaning power of the filter unit and the floor and at the same time facilitate the transfer of foreign substances by the treated water.

In addition, the rainwater treatment device can remove foreign substances from the bottom part and the feeder as well as the filter part by using an air washing device using air.

Various and advantageous advantages and effects of the embodiments are not limited to the above, and will be more easily understood in the course of describing specific embodiments of the embodiments.

1 is a view showing an initial rainwater treatment device capable of unmanned automatic control;
2 is a view showing a rainwater treatment apparatus according to an embodiment;
Figure 3 is a cross-sectional view showing the line AA of Figure 2,
4 is a cross-sectional view showing an embodiment of a rainwater treatment apparatus according to an embodiment based on line BB of FIG. 2;
5 is a cross-sectional view showing another embodiment of the rainwater treatment apparatus according to the embodiment based on the line BB of FIG. 2;
6 is a plan view showing the bottom of the second treatment tank disposed in the rainwater treatment apparatus according to the embodiment;
7 is a view showing a feeder disposed in a second treatment tank of the rainwater treatment apparatus according to the embodiment;
8 is a view showing a drain pipe of the cover part disposed in the water tank of the rainwater treatment apparatus according to the embodiment.

Since the present invention can have various changes and can have various embodiments, specific embodiments are illustrated and described in the drawings. However, this is not intended to limit the present invention to specific embodiments, and it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

Terms including an ordinal number, such as first, second, etc., may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the second component may be referred to as the first component, and similarly, the first component may also be referred to as the second component. and/or includes a combination of a plurality of related listed items or any of a plurality of related listed items.

When a component is referred to as being “connected” or “connected” to another component, it is understood that the other component may be directly connected or connected to the other component, but other components may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that no other element is present in the middle.

In the description of the embodiment, in the case where one component is described as being formed on "on or under" of another component, above (above) or below (below) (on or under) includes both components in which two components are in direct contact with each other or in which one or more other components are disposed between the two components indirectly. In addition, when expressed as 'up (up) or (down)' (on or under), the meaning of not only an upward direction but also a downward direction based on one component may be included.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

Hereinafter, the embodiment will be described in detail with reference to the accompanying drawings, but the same or corresponding components are given the same reference numerals regardless of reference numerals, and overlapping descriptions thereof will be omitted.

The rainwater treatment apparatus according to the embodiment may be installed on the flow path of the sewage pipe. Accordingly, the rainwater treatment apparatus may treat non-point pollutants included in the initial rainwater and then flow it into a river or the like.

FIG. 2 is a view showing a rainwater treatment apparatus according to an embodiment, FIG. 3 is a cross-sectional view taken along line AA of FIG. 2, and FIG. 4 is an embodiment of a rainwater treatment apparatus according to the embodiment based on line BB of FIG. is a cross-sectional view showing another embodiment of the rainwater treatment apparatus according to the embodiment with reference to the line BB of FIG. 2 . The x direction shown in FIGS. 2 to 5 may represent a length direction, a y direction may represent a width direction, and a z direction may represent a vertical direction.

Referring to FIGS. 2 and 3 , the rainwater treatment apparatus 1 according to the embodiment includes a body 10 having a space divided inside by first and second walls 11 and 12 , the body 10 . It may include an inlet 20 through which rainwater is introduced and an outlet 30 formed on the other side of the body 10 through which filtered rainwater is discharged. Here, the filtered rainwater can be called treated water, and will be described as 'treated water' below.

The body 10 of the rainwater treatment apparatus 1 includes a first treatment tank 100 , a second treatment tank 200 , and the first treatment tank 100 based on the treatment flow and the divided space of the rainwater. and a water tank 300 in which treated water that is water filtered by the second treatment tank 200 is stored. Here, the first treatment tank 100 may be referred to as a pretreatment tank, the second treatment tank 200 may be referred to as a filtration tank, and the water tank 300 may be referred to as a treatment tank.

In addition, the rainwater treatment device 1 uses the air cleaning device 400 for washing the bottom 210 or the filter 220 of the second treatment tank 200 using air and the treated water. 2 It may further include a water washing device 500 for washing the bottom 210 or the filter 220 of the treatment tank 200 .

2 and 3 , the body 10 includes a first treatment tank 100 , a second treatment tank 200 and a water tank 300 by first and second walls 11 and 12 . It can be formed as a hexahedral concrete structure divided into In this case, a passage 13 connected to the manhole may be formed on the upper surface of the body 10 .

The inlet 20 may be connected to the flow path of the sewage pipe.

In addition, a overflow ware (not shown) may be disposed at the inlet 20 to bypass and overflow rainwater greater than or equal to a set flow rate. Here, the overflow ware allows the initial rainwater to be evenly distributed and introduced into the screen 110 of the first treatment tank 100 while reducing the speed of rainwater that is excessively and rapidly pushed through the sewer pipe.

The outlet 30 may be connected to a pipe provided to flow into a river or the like.

The first treatment tank 100 may be disposed on the upstream side based on the flow of rainwater introduced therein. And, in the first treatment tank 100, a material having a large specific gravity among non-point pollutants included in the initial rainwater sinks to the bottom, and a material having a small specific gravity is filtered through the screen 110, and the second treatment tank together with rainwater It can flow to (200). In addition, the inlet 20 may be disposed on one side of the first treatment tank 100 .

Referring to FIG. 2 , the first treatment tank 100 may include a screen 110 and a first pump unit 120 disposed therein.

The screen 110 may block foreign substances of a predetermined size or larger, such as garbage and solids contained in rainwater, and reduce the speed of rainwater introduced into the screen. Here, the screen 110 may be formed in the form of a perforated plate or a mesh.

As shown in FIG. 2 , the screen 110 may be disposed on one side of the first wall 11 . At this time, the rainwater filtered primarily by the screen 110 may move to the second treatment tank 200 through the hole 11a formed to penetrate the lower side of the first wall 11 .

When there is no rainfall, the first pump unit 120 discharges rainwater accumulated in the first treatment tank 100 so that the first treatment tank 100 can maintain an empty state. At this time, the first pump unit 120 may discharge the sediment such as sludge deposited in the first treatment tank 100 to the sewage pipe.

Referring to FIG. 3 , the first pump unit 120 may include a first pump 121 and a first pipe 122 connected to the first pump 121 . Here, the first pump unit 120 may be installed at the bottom of the first treatment tank 100 to discharge the sediment of the first treatment tank 100 to the sewage pipe through the first pipe 122 . For example, the first pipe 122 of the first pump unit 120 may be connected to a sewage pipe line, and the first pipe 122 of the first pump unit 120 is provided to prevent a backflow through the sewage pipe line. For this purpose, a non-return valve (not shown) may be disposed.

On the other hand, the level switch for detecting the height or water level of the sediment deposited on the bottom of the first treatment tank 100 in real time, and operating the first pump 121 according to the output of the detection signal is the first treatment tank (100) may be disposed.

The second treatment tank 200 may secondarily re-filter the rainwater that has been firstly filtered through the screen 110 of the first treatment tank 100 using a filter. In this case, the second treatment tank 200 may be partitioned by the first treatment tank 100 and the first wall 11 .

The second treatment tank 200 uses a transfer means for transferring and collecting foreign substances accumulated on the bottom part 210 to one side and the structure of the bottom part 210 to smoothly process foreign substances generated by washing the filter, etc. can do.

That is, even if it is difficult for an operator to enter the lower side of the filter unit 220 and remove foreign substances due to the horizontal arrangement structure and size of the filter unit 220 , the rainwater treatment device 1 is provided with the transfer means and the bottom unit 210 . ) structure, since the operator does not need to directly enter the inside of the second treatment tank 200 and remove the foreign material, it is possible to continuously maintain the processing performance of the foreign material and prevent a safety accident for the operator.

2 to 5 , the second treatment tank 200 includes a bottom part 210 , a filter part 220 spaced apart from the upper side of the bottom part 210 , and the bottom part 210 . It may include a feeder 230 as a transfer means for transferring accumulated foreign substances, and a second pump unit 240 disposed to discharge foreign substances or rainwater collected in the second treatment tank 200 .

Foreign substances may be accumulated on the bottom part 210 of the second treatment tank 200 by the rainwater filtration process by the filter part 220 and the washing process by the filter part 220 .

At this time, there is a difficulty in handling foreign substances accumulated on the bottom part 210 due to the horizontal arrangement and size of the filter part 220 . Therefore, the rainwater treatment apparatus 1 according to the embodiment can easily discharge rainwater and foreign substances to the outside by using the structure formed on the bottom part 210 , the feeder 230 and the second pump part 240 . .

The second treatment tank 200 has a bottom structure of the bottom part 210 formed to collect foreign substances to one side, so that the foreign substances accumulated on the bottom part 210 can be easily treated.

3 and 4 , the bottom part 210 may include an inclined surface 212 for inducing foreign substances and a second groove 213 formed on one side of the inclined surface 212 based on the processing flow of rainwater. can As shown in FIG. 4 , since the bottom portion 210 may be formed of two inclined surfaces 212 disposed in different directions to face each other, the valleys 212a at the junction where the two inclined surfaces 212 meet ) can be formed. Here, one direction indicating the arrangement of the valleys 212a may be a processing direction of rainwater or a flow direction of rainwater.

The inclined surface 212 may be a surface having a gradient to guide foreign substances into the valleys 212a. As shown in FIG. 4 , the inclined surface 212 may be disposed on both sides in the width direction of the valley 212a, and may be formed to have a predetermined inclination angle θ. Here, the inclination angle θ may be 2 to 45 degrees. In this case, the inclined surface 212 may be formed to have a gradient with respect to the second groove 213 .

Accordingly, the foreign material in the second treatment tank 200 may move to the valley 212a by the weight of the inclined surface 212 and the foreign material.

The valleys 212a may be concave grooves formed long in the longitudinal direction. In addition, a feeder 230 may be disposed in the valley 212a.

The second groove 213 may be formed on one side in the longitudinal direction of the valley 212a, and may be formed deeply to have a lower surface than the valley 212a. Accordingly, foreign substances accumulated in the valley 212a by driving the feeder 230 may move to the second groove 213 .

The filter unit 220 may secondarily filter rainwater introduced into the second treatment tank 200 through the hole 11a formed in the first wall 11 .

The filter part 220 may be disposed to be spaced apart from the upper side of the bottom part 210 . In this case, the filter unit 220 may be disposed higher than the hole 11a formed in the first wall 11 . In addition, the filter unit 220 may be disposed at the same height or a lower height as the second wall 12 .

In addition, the filter unit 220 may remove oil, heavy metals, suspended matter, etc. contained in rainwater by using a plurality of filter media having a predetermined size made of a material such as ultra-high molecular polyethylene or nanofibers. Here, the filter media can be used for a long time without clogging as well as continuous circulation due to the physical properties and internal surface tension between particles by laminar flow.

Therefore, as the rainwater introduced into the interior of the second treatment tank 200 through the hole 11a fills up, the rainwater passes through the filter unit 220 and is re-filtered and then crosses the second wall 12 . It may be filled in the water tank 300 .

The feeder 230 may transfer foreign substances accumulated on the bottom portion 210 . In detail, the feeder 230 may be disposed in the valley 212a to transfer foreign substances accumulated in the valley 212a to the second groove 213 . Accordingly, the feeder 230 may be used as a part of a foreign material removal means for removing foreign materials accumulated on the bottom 210 side of the second treatment tank 200 .

Here, the feeder 230 may be formed in a screw type, and may be rotated by a driving unit (not shown). Accordingly, the foreign material accumulated in the valley 212a may be transferred to the second groove 213 by the rotation of the feeder 230 and then accumulated in the second groove 213 .

In addition, the feeder 230 may be rotatably disposed in the valley 212a by a rotation support device disposed on one side and the other side of the feeder 230 . Here, the rotation support device may include a first support portion 230a disposed under the first wall 11 and a second support portion 230b disposed on the side of the second wall 12 .

The first support part 230a may be a bearing device. Accordingly, the first support part 230a may rotatably support one side of the feeder 230 .

The second support part 230b may be a bearing device having a sealing function by a sealing member. Accordingly, the second support part 230b may prevent rainwater from flowing into the tank 300 while rotatably supporting the other side of the feeder 230 . Here, the second support 230b may be disposed on the second wall 12 .

6 is a view showing the bottom of the second treatment tank disposed in the rainwater treatment apparatus according to the embodiment.

3, 5 and 6 , the bottom part 210 includes a first groove 211 elongated in one direction, an inclined surface 212 for guiding foreign substances into the first groove 211 , and the second groove 211 . A second groove 213 formed on one side of the first groove 211 may be included. Here, one direction indicating the arrangement of the first groove 211 may be a processing direction of rainwater or a flow direction of rainwater.

The first groove 211 may be a concave groove elongated in the longitudinal direction. In addition, a feeder 230 may be disposed in the first groove 211 . Accordingly, the first groove 211 may be formed in a shape corresponding to the feeder 230 .

The inclined surface 212 may be a surface having a gradient to guide foreign substances into the first groove 211 . 4 and 5 , the inclined surfaces 212 are disposed on both sides of the first groove 211 in the width direction, and may be formed to have a predetermined inclination angle θ. Here, the inclination angle θ may be 2 to 45 degrees. In this case, the inclined surface 212 may be formed to have a gradient with respect to the second groove 213 .

Accordingly, the foreign material in the second treatment tank 200 may move to the first groove 211 due to the weight of the inclined surface 212 and the foreign material.

The second groove 213 may be formed deeper than the first groove 211 to have a lower bottom surface than the bottom surface of the first groove 211 . Accordingly, foreign substances accumulated in the first groove 211 by driving the feeder 230 may move to the second groove 213 .

The filter unit 220 may secondarily filter rainwater introduced into the second treatment tank 200 through the hole 11a formed in the first wall 11 .

The filter part 220 may be disposed to be spaced apart from the upper side of the bottom part 210 . In this case, the filter unit 220 may be disposed higher than the hole 11a formed in the first wall 11 . In addition, the filter unit 220 may be disposed at the same height or a lower height as the second wall 12 .

In addition, the filter unit 220 may remove oil, heavy metals, suspended matter, etc. contained in rainwater by using a plurality of filter media having a predetermined size made of a material such as ultra-high molecular polyethylene or nanofibers. Here, the filter media can be used for a long time without clogging as well as continuous circulation due to the physical properties and internal surface tension between particles by laminar flow.

Therefore, as the rainwater introduced into the interior of the second treatment tank 200 through the hole 11a fills up, the rainwater passes through the filter unit 220 and is re-filtered and then crosses the second wall 12 . It may be filled in the water tank 300 .

The feeder 230 may transfer foreign substances accumulated on the bottom portion 210 . In detail, the feeder 230 may be disposed in the first groove 211 to transfer foreign substances accumulated in the first groove 211 to the second groove 213 . Accordingly, the feeder 230 may be used as a part of a foreign material removal means for removing foreign materials accumulated on the bottom 210 side of the second treatment tank 200 .

Here, the feeder 230 may be formed in a screw type, and may be rotated by a driving unit (not shown). Accordingly, foreign substances accumulated in the first groove 211 may be transferred to the second groove 213 by the rotation of the feeder 230 and then be accumulated in the second groove 213 .

In addition, the feeder 230 may be rotatably supported by rotation support devices disposed on one side and the other side of the feeder 230 . In this case, the feeder 230 may be disposed in the first groove 211 . Here, the rotation support device may include a first support portion 230a disposed under the first wall 11 and a second support portion 230b disposed on the side of the second wall 12 .

The first support part 230a may be a bearing device. Accordingly, the first support part 230a may rotatably support one side of the feeder 230 .

The second support part 230b may be a bearing device having a sealing function by a sealing member or the like. Accordingly, the second support part 230b may prevent rainwater from flowing into the tank 300 while rotatably supporting the other side of the feeder 230 . Here, the second support 230b may be disposed on the second wall 12 .

7 is a view showing a feeder disposed in the second treatment tank of the rainwater treatment apparatus according to the embodiment.

Meanwhile, the feeder 230 may include a cylindrical pipe 231 and a blade 232 forming a screw shape on an outer circumferential surface of the pipe. As the pipe 231 rotates, the blade 232 may transfer the foreign material to be transferred toward the second groove 213 .

At this time, a hole 233 may be formed in the pipe 231 , and one side of the pipe 231 may be connected in communication with the second duct 430 of the air washing device 400 . Accordingly, the air supplied from the air washing device 400 may be sprayed onto the blade 232 through the hole 233 to remove foreign substances attached to the blade 232 . In this case, the hole 233 may be disposed adjacent to the blade 232 , and a nozzle may be disposed in the hole 233 .

The second pump unit 240 discharges rainwater accumulated in the second treatment tank 200 to maintain the second treatment tank 200 in an empty state. In addition, the second pump unit 240 may discharge the sediment such as sludge deposited in the second treatment tank 200 to the sewage pipe. For example, the second pump unit 240 may discharge rainwater and foreign substances accumulated in the second groove 213 to the sewage pipe.

Referring to FIG. 3 , the second pump unit 240 may include a second pump 241 and a second pipe 242 connected to the second pump 241 . Accordingly, the second pump unit 240 may discharge the sediment from the second treatment tank 200 to the sewage pipe through the second pipe 242 .

The second pump 241 may be disposed in the passage 13 , as shown in FIG. 3 . Accordingly, the operator can easily repair and maintain the second pump 241 .

The second pipe 242 may be connected to a sewage pipe. In addition, a non-return valve (not shown) may be disposed on the second pipe 242 of the second pump unit 240 to prevent a reverse flow through the sewage pipe.

On the other hand, the level switch for detecting the height or water level of the sediment deposited on the bottom of the second treatment tank 200 in real time and operating the second pump 241 according to the output of the detection signal is the second treatment tank 200 may be disposed.

The water tank 300 may temporarily store treated water, which is water filtered by the first treatment tank 100 and the second treatment tank 200 . For example, rainwater filtered by the filter unit 220 of the second treatment tank 200 may be stored in the water tank 300 beyond the second wall 12 . In this case, an outlet 30 may be disposed on one side of the water tank 300 for discharging the treated water.

Referring to FIG. 3 , the water tank 300 may be formed in a cylindrical shape capable of storing the treated water.

In addition, the water tank 300 may include a cover part 310 .

8 is a view showing a drain pipe of the cover part disposed in the water tank of the rainwater treatment apparatus according to the embodiment.

The cover part 310 may be disposed to cover an upper portion of the treated water stored in the water tank 300 . Accordingly, the cover part 310 can prevent contamination of the treated water stored in the water tank 300 . Furthermore, the cover part 310 may filter the rainwater filtered by the filter part 220 once more using the drain pipe 312 . In this case, the plate 311 of the cover part 310 may be disposed below the outlet 30 .

3 and 8 , the cover part 310 includes a plate 311 disposed to cover the upper side of the treated water and a plurality of drain pipes ( 312) may be included. Accordingly, rainwater filtered by the filter unit 220 may be temporarily stored in the water tank 300 through the drain pipe 312 .

The plate 311 may be disposed below the upper end of the second wall 12 . And, as shown in FIG. 3 , the lower side of the outlet 30 may be disposed below the upper end of the second wall 12 .

The drain pipe 312 makes it possible to store treated water in the lower portion of the plate 311 using capillary action, gravity, pressure, and surface tension. For example, even if rainwater is filtered by the filter unit 220 , some foreign substances may remain, and the drain pipe 312 may collect the remaining foreign substances. Here, the drain pipe 312 may be formed of a soft PVC material.

The drain pipe 312 may include a plurality of grooves elongated in the longitudinal direction of the drain pipe 312 . In addition, the plurality of grooves may be disposed along the circumferential direction of the drain pipe 312 . Accordingly, the contact area with the rainwater filtered by the filter unit 220 can be improved, and the drain pipe 312 has high pressure resistance by this structure.

Therefore, the rainwater filtered by the filter unit 220 moves to the inside of the drain pipe 312 by capillary action and pressure, and then the plate (Siphon) action generated by gravity and pressure difference 311) can be drained to the lower side. At this time, since the remaining foreign substances may be filtered by the drain pipe 312 , only pure treated water may be stored in the water tank 300 .

And, as the treated water stored in the water tank 300 rises, the treated water may be naturally discharged through the outlet 30 disposed above the plate 311 . Here, a pump may be provided in the water tank 300 to further facilitate the discharge of the treated water through the outlet 30 .

Meanwhile, foreign substances may be attached to the filter unit 220 during rainwater filtration using the filter unit 220 .

The rainwater treatment device 1 can remove foreign substances inside the second treatment tank 200 using an air washing device 400 using high-pressure air and a water washing device 500 using the treated water. . Here, the air cleaning device 400 can remove the foreign substances by spraying air to the foreign substances inside the second treatment tank 200 . Also, the water washing device 500 may recycle the treated water stored in the water tank 300 to wash foreign substances inside the second treatment tank 200 .

3 to 5 , the air washing device 400 includes an air blower 410 , a first duct 420 connected in communication with the air blower 410 , and one side of the air blower 410 . The second duct 430 may include a second duct 430 connected to the feeder 230 in communication with the other side. In addition, the air washing apparatus 400 may include a plurality of first nozzles 440 and second nozzles 450 that are divided by the efficient spraying and spraying directions of the air.

The air blower 410 may form high-pressure air. And, as shown in FIG. 3 , the air blower 410 may be installed in an airtight space to prevent corrosion by rain as well as easy maintenance through a manhole.

One side of the first duct 420 may be connected in communication with the air blower 410 to guide high-pressure air formed by the air blower 410 . In addition, a portion of the first duct 420 may be disposed under the filter unit 220 , but is not limited thereto. For example, the first duct 420 may be disposed in the filter unit 220 . However, in order to inject the air toward the bottom 210 of the second treatment tank 200 , as shown in FIGS. 4 and 5 , the first duct 420 is connected to the second treatment tank 200 . ) is preferably disposed under the filter unit 220 . In this case, the first duct 420 may be spaced apart from the upper side of the bottom 210 of the second treatment tank 200 .

The second duct 430 may guide the high-pressure air formed by the air blower 410 to the feeder 230 . Accordingly, the high-pressure air transferred into the pipe 231 of the feeder 230 may be sprayed to the blade 232 through the hole 233 .

The first nozzle 440 causes the air transferred through the first duct 420 to be sprayed onto the filter unit 220 . In this case, a plurality of the first nozzles 440 may be disposed in the first duct 420 to face the filter unit 220 . Accordingly, the air injected from the first nozzle 440 shakes and disturbs the filter medium of the filter unit 220 , so that foreign substances adhering to the filter medium may be removed.

In detail, when the second treatment tank 200 is in a dry state, the rainwater treatment device 1 may remove foreign substances attached to the filter unit 220 using high-pressure air. Accordingly, foreign substances are accumulated on the bottom surface of the bottom part 210 .

The second nozzle 450 causes the air transferred through the first duct 420 to be sprayed onto the bottom portion 210 . In this case, a plurality of the second nozzles 450 may be disposed in the first duct 420 to face the bottom portion 210 . Accordingly, the air sprayed from the second nozzle 450 may remove and move foreign substances attached to the bottom part 210 . In addition, the removed foreign material moves to the first groove 211 by the air sprayed from the inclined surface 212 and the second nozzle 450 .

The water washing device 500 may recycle the treated water of the water tank 300 to remove foreign substances inside the second treatment tank 200 . At this time, since the water washing device 500 recycles the treated water, it is possible to remove the foreign substances without using water transferred from a separate water supply. Accordingly, it is possible to reduce the foreign matter processing cost.

3 to 5 , the water washing device 500 includes a third pump 510 , a third pipe 520 connected in communication with the third pump 510 , and the third pipe 520 . ) and may include a plurality of third nozzles 530 for spraying treated water toward the filter unit 220 .

In addition, the water washing device 500 is disposed in a fourth pipe 540 connected in communication with the third pump 510 , and the fourth pipe 540 to move the treated water toward the bottom 210 . It may further include a plurality of fourth nozzles 550 for spraying.

Here, a valve (not shown) having an opening/closing function may be disposed in each of the third pipe 520 and the fourth pipe 540 . In this case, the valve may be an electromagnetic valve such as a solenoid valve whose opening and closing is controlled by an electrical signal.

The third pump 510 may form water pressure to transfer the treated water to the third pipe 520 and the fourth pipe 540 . In this case, the third pump 510 may be disposed at the bottom of the water tank 300 .

One side of the third pipe 520 may be connected to the third pump 510 to guide the treated water transferred by the third pump 510 . In addition, a part of the third pipe 520 may be disposed above the filter unit 220 , but is not limited thereto. For example, the third pipe 520 may be disposed in the filter unit 220 .

The third nozzle 530 sprays the treated water transferred through the third pipe 520 to the filter unit 220 . In this case, a plurality of the first nozzles 440 may be disposed in the third pipe 520 to face the filter unit 220 .

Accordingly, the filter media of the filter unit 220 may be washed by the treated water sprayed from the third nozzle 530 .

For example, the rainwater treatment device 1 primarily disturbs the filter medium through high-pressure air to remove foreign substances, and secondarily washes the filter medium using treated water, thereby cleaning the filter unit 220 . can improve

One side of the fourth pipe 540 may be connected to the third pump 510 to guide the treated water transferred by the third pump 510 . In this case, the fourth pipe 540 may be branched from one side of the third pipe 520 . Here, the fourth pipe 540 may be disposed on the lower side of the filter unit 220 .

Accordingly, the treated water guided by the fourth pipe 540 may be sprayed through the fourth nozzle 550 .

The fourth nozzle 550 sprays the treated water transferred through the fourth pipe 540 to the bottom 210 . In this case, a plurality of the fourth nozzles 550 may be disposed in the fourth pipe 540 to spray the treated water toward the bottom 210 . In addition, in consideration of the cleaning of the inclined surface 212 , the fourth nozzle 550 may be formed in a rotating structure that is rotated by a separate actuator.

Accordingly, the treated water sprayed from the fourth nozzle 550 may remove foreign substances attached to the bottom portion 210 . In addition, the removed foreign material moves to the first groove 211 by the treated water sprayed from the inclined surface 212 and the fourth nozzle 550 .

Therefore, the rainwater treatment device 1 uses the air washing device 400 and the water washing device 500 to improve the cleaning power of the filter unit 220 of the second treatment tank 200 and simultaneously remove foreign substances from the inside. By effectively treating it, it is possible to continuously maintain the processing performance of foreign substances.

On the other hand, the rainwater treatment device 1 according to the embodiment can organically control the operation of all devices by sending an electronic control signal to each device through the control unit C installed on the ground. Here, the control unit C may be a general microcomputer.

The control unit (C) checks the water level value measured by the level switch, the integration timer (TMR) and the water level sensor, and sends an electronic control signal to the pump, valve and air blower 410 based on the water level value to control the operation can do.

Accordingly, the rainwater treatment apparatus 1 can operate unattended by controlling components such as a pump that is electrically driven through the control unit C.

Although the above has been described with reference to the embodiments of the present invention, those of ordinary skill in the art can variously modify and modify the present invention within the scope without departing from the spirit and scope of the present invention described in the claims below. You will understand that it can be changed. And, it should be construed as being included in the scope of the present invention defined in the appended claims for differences related to such modifications and changes.

1: rainwater treatment device 10: body
100: first treatment tank 110: screen
120: first pump unit
200: second treatment tank
210: bottom 220: filter unit
230: feeder 240: second pump unit
300: water tank
310: cover part 312: drain pipe
400: air cleaning device
500: water washing device

Claims (9)

a first treatment tank including a screen for filtering rainwater introduced through the inlet, and a first pump unit for discharging rainwater and sediments therein;
a second treatment tank for re-filtering the rainwater filtered in the first treatment tank; and
and a tank for storing the treated water that is rainwater filtered by the first treatment tank and the second treatment tank,
The second treatment tank
bottom,
A filter unit that is spaced apart from the upper side of the bottom and re-filters the rainwater filtered in the first treatment tank;
A feeder that transports and collects foreign substances accumulated on the bottom to one side, and
Rainwater treatment apparatus including a second pump for discharging foreign substances collected by the feeder. According to claim 1,
the bottom part
a first groove in which the feeder is disposed;
an inclined surface formed to have a predetermined inclination angle θ to guide foreign substances into the first groove, and
Rainwater treatment apparatus including a second groove in which foreign substances moving by the feeder are accumulated. According to claim 1,
the bottom part
an inclined surface formed to have a predetermined inclination angle θ, and
Rainwater treatment apparatus including a second groove in which foreign substances moving by the feeder are accumulated. 4. The method according to any one of claims 1 to 3,
The cover portion disposed in the water tank
plate, and
and a plurality of drain pipes passing through the plate,
The drain pipe filters rainwater filtered by the filter unit and discharges the treated water to the lower part of the plate. 4. The method according to any one of claims 1 to 3,
Further comprising an air washing device for washing the inside of the second treatment tank using air,
The air cleaning device
air blower;
a first duct connected to the air blower;
a first nozzle disposed in the first duct to spray air toward the filter unit; and
The rainwater treatment apparatus including a second nozzle disposed in the first duct for jetting air toward the floor. 6. The method of claim 5,
The air washing device further comprises a second duct connected to the air blower,
One side of the second duct is a rainwater treatment device connected to the feeder. 7. The method of claim 6,
the feeder
a pipe to which the second duct is connected;
a blade forming a shape of a screw on the outer circumferential surface of the pipe; and
It includes a hole formed in the pipe,
The rainwater treatment device in which the air that has moved into the pipe through the second duct is sprayed onto the blade through the hole. 4. The method according to any one of claims 1 to 3,
Further comprising a water washing device for washing the inside of the second treatment tank using the treated water,
The water washing device
a third pump,
a third pipe connected to the third pump;
a plurality of third nozzles disposed in the third pipe and spraying treated water toward the filter unit;
a fourth pipe connected to the third pump; and
and a plurality of fourth nozzles disposed on the fourth pipe to spray treated water toward the bottom. a first treatment tank including a screen for filtering rainwater introduced through the inlet, and a first pump unit for discharging rainwater and sediments therein;
a second treatment tank for re-filtering the rainwater filtered in the first treatment tank;
a water tank for storing the treated water which is rainwater filtered by the first treatment tank and the second treatment tank;
an air cleaning device for spraying air on foreign substances inside the second treatment tank; and
and a water washing device for recycling the treated water of the water tank to wash foreign substances inside the second treatment tank.

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