KR102498213B1 - Nonpoint pollution source reducing apparatus - Google Patents

Abstract

Provided is a non-point pollution source reducing apparatus, which can facilitate the flow of sludge. The non-point pollution source reducing apparatus includes: a pre-processing tank which includes a pre-processing chamber, an inlet receiving initial rainwater to be able to be supplied to the pre-processing chamber, and a screen installed in the pre-processing chamber to filter out foreign substances in the initial rainwater and pre-processes the rainwater in the pre-processing chamber; a filtering tank which is provided with a filtering chamber connected to the pre-processing tank, and enables removal of fine solids and suspended solids that have not been removed through the pre-processing performed in the pre-processing tank; a processing water tank which collects and discharges the processed water during filtering and sends the processed water to the filtering tank to enable water washing during back washing; and a screen cleaning member which is installed in the pre-processing chamber, and of which at least a part relatively moves for the screen to clean the screen.

Description

Non-point pollution reduction device {NONPOINT POLLUTION SOURCE REDUCING APPARATUS}

The present invention relates to a non-point pollution reducing device, and more particularly, to a non-point pollution reducing device capable of cleaning a screen with a brush and a water cleaning unit attached through air injection into an air suspension device and raising the suspension device.

In general, non-point source refers to a discharge source that discharges water pollutants in an unspecified place such as a city, road, farmland, mountain area, construction site, etc. In contrast, point pollution sources refer to pollutant emission sources that are easy to collect as the outflow route of pollutants is clear, and since the seasonal influence is relatively small, the amount of generation can be predicted throughout the year, so the design and management of treatment facilities such as treatment plants is possible. It is easy to deal with, but it is difficult to collect pollutants from non-point pollutants because the outflow and discharge routes of pollutants are not clearly distinguished. There are difficult problems.

In addition, the non-point pollutants are fertilizers and pesticides remaining on farmland without being absorbed by crops, feces of livestock grazing on grassland, untreated livestock wastewater discharged from livestock breeding farms, air pollutants mixed with rainwater, sediments on road surfaces, etc. When it rains, it has a characteristic that it flows down to the river along with the rainwater.

The non-point pollution sources are specifically classified into soil, nutrients, bacteria and viruses, and the like will be described in detail below.

Sediment is a contaminant that occupies a large part of rainfall runoff, and other contaminants, including nutrients, metals, hydrocarbons, etc. It affects.

In addition, nutrients, such as fertilizer residues, are often run off by rainwater and promote the growth of algae, thereby deteriorating the quality of river water. . In addition, bacteria and viruses (Bacteria & Viruses) are frequently detected in animal feces and discharge water overflowed from sewage.

Oil and grease can be fatal to aquatic organisms even in small amounts, and contamination occurs during accidents such as leaks or vehicle rollovers, vehicle washing, and illegal dumping of waste oil. Heavy metals such as lead, zinc, cadmium, copper, and nickel are substances commonly detected in rainfall runoff in urban areas, and more than 50% of the total amount of metals flowing into rivers is discharged through soil and sand, which is fatal to the aquatic ecosystem and bioaccumulates. This occurs and there is a possibility of contamination of drinking water, so special management is required.

Organics are discharged from a wide range of places, such as fields, rice fields, forests, and residential areas. In particular, organic substances contained in the sewage that normally flows through the sewage pipe at a weak flow rate in the confluence pipe are precipitated at the bottom of the conduit and temporarily discharged during rainfall. In industrial areas, artificial organic compounds such as adhesives, cleaners and solvents are widely used, improperly stored and disposed of. Pesticides such as herbicides, pesticides and fungicides can accumulate in aquatic organisms such as plankton and cause bioconcentration through the food web, with fatal consequences for fish and birds.

Gross Pollutants mean heavy metals, pesticides, bacteria, etc. in garbage, residues, and floating matter generated at construction sites and business sites. It serves as a medium for transport to rivers and reduces dissolved oxygen, which can cause fish mortality.

These non-point pollutants listed above pollute the water quality by being introduced directly into the river without special treatment, thereby causing a group death of fish or destroying the habitat of benthic organisms, causing disturbance of the aquatic ecosystem.

Moreover, as the impermeable layer has increased in recent years due to land development, the amount of rainwater discharged into the river instead of being absorbed into the soil or evaporated during rainfall increases, increasing the risk of flooding and reducing groundwater recharge, thereby contributing to the dryness of rivers in normal times. It can also be a trigger factor.

In particular, in the case of non-point pollution in urban areas, the area of green areas and permeable layers is decreasing in cities, but the area of impermeable layers is increasing due to housing site development. Contaminants that were adsorbed and moved on the back fall together during the rainy season and cannot pass through the impervious surface, but flow together with rainwater and flow into the river all at once. On the other hand, the risk of flooding increases, and there is a problem in that the river becomes dry due to insufficient water for maintaining the river during the dry season.

In addition, not only suspended solids (SS) and nutrients, but also bacteria, metallic substances, and some organic toxic substances are generally discharged from residential areas and roads.

On the other hand, looking at the movement dynamics of the non-point pollutants during rain, the particulate pollutants deposited on the ground surface are washed away by rainwater and flowed into the river all at once. ) appears and the concentration decreases as the rainfall continues. In other words, since rainfall runoff contains high concentrations of organic substances and various toxic substances, it can be said to be a major cause of destruction of river ecosystems and water pollution, such as mass mortality of fish.

Patent Document 1 discloses a device for reducing non-point pollution sources installed on a bridge, comprising: a main body portion having an accommodation form and having an inlet and drainage channels connected to at least one surface through which fluid is introduced and discharged; and a first septic tank installed inside the main body unit to block and primarily remove non-point pollutant suspended matter and sediment from the fluid flowing in through the inflow passage, and non-point pollutants from the fluid introduced from the first septic tank. A purification unit including a second septic tank for adsorbing and secondarily removing non-point pollutants from the fluid flowing in from the second septic tank and a third septic tank configured to be connected to filter and thirdly remove nonpoint pollutants from the fluid flowing in from the second septic tank and drain the fluid to the outside through the drainage channel It is possible to provide a non-point pollution source reduction device that does.

In the case of a conventional non-point pollution reduction device, there is a problem in that the flow of rainwater is restricted due to foreign matter or coarse impurities blocking the passage.

In addition, there is a problem in that sludge is difficult to flow because the sludge is stacked on one side at the bottom inside the filtration chamber.

On the other hand, these non-point pollutant reduction devices are maintained by removing coarse impurities and precipitated sludge and dredging in order to have a certain pollutant removal efficiency. report every year to organizations that manage non-point pollution source reduction devices, such as each regional environmental basin office.

The most important reason for submitting and reporting a maintenance report is that proper maintenance should be carried out after installing a nonpoint pollutant reduction device to ensure efficient removal of nonpoint pollutants, and maintenance is a very important matter.

Application No. 10-2015-0169151 (2015.11.30)

The present invention has been made to solve the above problems, and a first object of the present invention is to separate foreign substances or coarse impurities attached to the screen from the screen, thereby improving excellent flow performance through the screen. It is to provide a non-point pollution reduction device having a structure that can be improved.

In addition, a second object of the present invention is to provide a non-point pollution reducing device capable of guiding sludge to flow from the bottom inside the filtration chamber to the inside.

In addition, the third object of the present invention is the problem of limiting the flow of rainwater due to coarse impurities, which is the most important part in the maintenance of the non-point pollution source reduction device, and the flowability of the layered bottom of the filter chamber, which is difficult to clean and dredge. It is to provide a non-point pollution reduction device capable of maintaining steady removal efficiency of non-point pollutants through automatic maintenance in an efficient way by removing sludge before it hardens.

In order to solve the above problems, an apparatus for reducing non-point pollution of the present invention is installed in a pretreatment chamber, an inlet for receiving initial rainwater and supplying it to the pretreatment chamber, and installed in the pretreatment chamber to remove foreign substances in the initial rainwater. a pretreatment tank having a filtering screen and pretreating the initial rainwater in the pretreatment chamber; a filtration tank having a filtration chamber connected to the pre-treatment tank and enabling removal of fine solids and suspended solids not removed through the pre-treatment performed in the pre-treatment tank; A treated water tank that collects and discharges the treated water during filtration and sends the treated water to the filtration tank during backwashing to enable water washing; and a screen cleaning member that is installed in the pretreatment chamber and at least partially moves relative to the screen to enable cleaning of the screen.

According to an example related to the present invention, the screen cleaning member may include an air suspension device connected to the screen and receiving air generated from an air blower and adjusting a height thereof; and a cleaning brush coupled to the air suspension device to move relative to the screen to enable cleaning of the screen.

The screen cleaning member may further include a water washing unit that is coupled to the air suspension device to move relative to the screen and allows the screen to be washed with water.

The water washing unit may include a water washing pipe that is coupled to the air suspension device to move relative to the screen and communicates with the washing pipe part to receive water; and a water washing nozzle provided in the water washing pipe and configured to spray water onto the screen.

The air suspension device may include a support provided at one side of the air suspension device to relatively fix the air suspension device to the screen; A height-variable pleat portion having a space for receiving air therein and expanding or contracting according to the amount of air accommodated therein so that the height thereof is variable; and a brush coupling part disposed on one side of the variable-height wrinkle part and capable of supporting a washing brush.

The air suspension device may further include a bracket supporting and fixing the support part at a position adjacent to the screen.

Preferably, the pretreatment chamber includes a barrier rib for discriminating and accommodating rainwater from which coarse impurities are filtered out by the screen from rainwater before passing through the screen, the screen is provided on an upper portion of the barrier rib, and the bracket is the screen It may be provided on the upper part of the barrier rib so as to be adjacent to.

The cleaning brush may include a cleaning support coupled to one side of the air suspension device; and a brush that is fixedly coupled to the cleaning support and moves together to clean the screen.

According to another example related to the present invention, the non-point pollution reduction device, by receiving power from the power supply unit, an air blower for generating a flow of air; and a blower connecting pipe connected to the air blower and having a flow path for supplying air generated by the air blower to an air suspension device.

Preferably, the cleaning brush may have a cross section matching the shape of the screen.

According to another example related to the present invention, the filtration tank includes an inlet having an inlet into which rainwater passing through the pretreatment tank is introduced, and a filtration chamber accommodating the inflowed rainwater; an air washing pipe installed on one side of the filtration chamber, provided with a washing nozzle receiving air from an air blower and discharging air to enable air backwashing; and a sludge guiding guide provided at a lower end of the filtration chamber and extending toward the inside to guide the sludge to flow from the lower end inside the filtration chamber to the inside.

The filtration tank includes: a filtration chamber having an inlet into which rainwater that has passed through the pretreatment tank is introduced, and accommodating the inflowed rainwater; a water washing tube unit installed above the filtration chamber; an air washing pipe installed at a lower part of the filtration chamber, provided with a washing nozzle receiving air from an air blower and discharging air to enable air backwashing; a sludge conveying pipe installed below the filtration chamber and having a water washing nozzle part for spraying water to allow the sludge to flow; and a sludge guiding guide provided at a lower end of the filtration chamber and extending toward the inside to guide the sludge to flow from the lower end inside the filtration chamber to the inside.

An inner lower surface of the filtration chamber may be formed along the flow direction of the sludge. In addition, in order to forcibly flow the sludge, an injecting nozzle may be installed, and water for backwashing in the third septic tank (treated water tank) may be used.

The non-point pollution reduction device of the present invention can remove foreign substances or coarse impurities attached to the screen from the screen by the screen cleaning member, and thereby improve the flow performance of rainwater passing through the screen.

In the apparatus for reducing boiling point pollution of the present invention, the filtration chamber is provided with a sludge guide guide, so that the sludge can be guided from the bottom inside the filtration chamber to the inside.

In addition, in the non-point pollution reduction device of the present invention, the lower surface inside the filtration chamber is formed to be inclined in the flow direction of the sludge to facilitate the flow of the sludge.

In addition, in the non-point pollution reduction device of the present invention, an inwardly directed spray nozzle may be installed to forcibly flow the sludge, and water for backwashing in the third septic tank (treated water tank) may be used.

1A is a plan view showing a non-point pollution reduction device of the present invention.
Figure 1b is a cross-sectional side view of Figure 1a.
2A is a plan view showing a lower part of the non-point pollution reduction device of the present invention.
Figure 2b is a side cross-sectional view of the non-point pollution reduction device of the present invention.
Fig. 2c is a perspective view showing the screen and screen cleaning member of the present invention;
Fig. 2d is a conceptual diagram showing an example in which the screen cleaning member of the present invention operates.
2E is a conceptual diagram showing an example in which the screen cleaning member of the present invention stands by;
Fig. 2f is a plan view showing an air suspension system of the present invention;
Figure 3 is a plan view showing the treatment process of the present invention.
Figure 4 is a side cross-sectional view showing the treatment process of the present invention.
5 is a side cross-sectional view illustrating a process in which initial rainwater is introduced into a pretreatment tank;
6 is a side cross-sectional view illustrating a process in which rainwater is introduced into a filtration tank through a screen and a lower inlet of the pretreatment tank;
7 is a side cross-sectional view illustrating a process in which rainwater passes through a filtration tank and flows into a treatment tank;
8 is a side cross-sectional view illustrating a process in which treated water above a certain water level is discharged.
9 is a side cross-sectional view illustrating a process in which rainwater is accommodated in a pretreatment tank, a filtration tank, and a treatment tank after the rainfall has ended.
10 is a side cross-sectional view illustrating a first stagnant water discharge process;
11 is a side cross-sectional view illustrating a process of air backwashing using a blower;
12 is a side cross-sectional view illustrating a secondary stagnant water discharging process;
13 is a cross-sectional side view illustrating a process of water washing;
14 is a side cross-sectional view showing a 3rd/4th backwash discharge water discharge process;
15 is a process piping instrumentation diagram (P&ID) showing a filtration process.
16 is a process piping instrumentation diagram (P&ID) showing a primary stagnant water discharge process.
17 is a process piping instrumentation diagram (P&ID) showing an air backwashing process.
18 is a process piping instrumentation diagram (P&ID) showing a secondary stagnant water discharge process.
19 is a process piping instrumentation diagram (P&ID) showing water tax.
20 is a process piping instrumentation diagram (P&ID) showing a tertiary backwash discharge water discharge process.
21 shows the lower washing of the filtration tank using the lower washing pump in the treatment tank to transfer the lower sludge to the pretreatment tank, and at the same time, washing the screen with the water washing pipe connected to the suspension device of the pretreatment tank screen facility, and at the same time to the operation of the blower A process piping instrumentation diagram (P&ID) showing an example in which a second cleaning movement is performed by
22 is a process piping instrumentation diagram (P&ID) showing an example of discharging all of the backwash discharge water in the pretreatment tank and the filtration tank up to level gauge-3 after the 4th stagnant water discharge process, that is, the bottom washing is finished.

Hereinafter, the non-point pollution reduction device 100 related to the present invention will be described in more detail with reference to the drawings.

In this specification, the same or similar reference numerals are given to the same or similar components even in different embodiments, and overlapping descriptions thereof will be omitted.

In addition, a structure applied to one embodiment may be equally applied to another embodiment as long as there is no structural or functional contradiction between different embodiments.

Singular expressions include plural expressions unless the context clearly dictates otherwise.

In describing the embodiments disclosed in this specification, if it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed in this specification, the detailed descriptions thereof will be omitted.

The accompanying drawings are only for easy understanding of the embodiments disclosed in this specification, and the technical idea disclosed in this specification is not limited by the accompanying drawings, and all changes and equivalents included in the spirit and technical scope of the present invention are included. It should be understood to include water or substitutes.

1A is a plan view showing a non-point pollution reduction device 100 of the present invention, and FIG. 1B is a side cross-sectional view of FIG. 1A. 2A is a plan view showing a lower part of the non-point pollution reduction device 100 of the present invention, and FIG. 2B is a side cross-sectional view of the non-point pollution reduction device 100 of the present invention.

2c is a perspective view showing the screen 17 and the screen 17 cleaning member of the present invention, FIG. 2d is a conceptual diagram showing an example of the operation of the screen 17 cleaning member of the present invention, and FIG. 2e is It is a conceptual diagram showing an example in which the cleaning member of the screen 17 of the present invention is on standby, and FIG. 2F is a plan view showing the air suspension device 18a of the present invention.

Hereinafter, with reference to Figs. 1A to 2F, the structure of the non-point pollution reduction device 100 of the present invention is described.

The non-point pollution reduction device 100 of the present invention includes a pretreatment tank 10, a filtration tank 20, and a treatment water tank 30.

The pretreatment tank 10 includes a pretreatment chamber 11 and an inlet through which initial rainwater is received and supplied to the pretreatment chamber 11 . In addition, the pretreatment tank 10 pretreats the initial rainwater within the pretreatment chamber 11 .

For example, the pretreatment tank 10 increases the retention time of influent water to effectively remove sedimentary solids and coarse debris contained in the initial rainwater, thereby reducing the load on the filter medium. The pretreatment tank 10 may be equipped with a screen 17 to be described later to remove settling solids and coarse impurities.

The pretreatment chamber 11 accommodates the initial rainwater introduced through the inlet pipe 13 to enable pretreatment. In addition, in the pretreatment chamber 11, sedimentary solids are stacked on the lower portion and separated. Coarse impurities are removed by a screen 17 described later.

In addition, when initial rainwater flows into the pretreatment chamber 11, it fills up to the surface of the lower part of the screen 17.

The inlet pipe 13 is coupled to one side of the pretreatment chamber 11 and allows initial rainwater to flow into the space within the pretreatment chamber 11 .

In addition, the pretreatment tank 10 may further include a stagnant water discharge pump 15 and a screen 17 .

As shown in FIG. 1B , the stagnant water discharge pump 15 may be installed in the inner lower part of the pretreatment chamber 11 . The stagnant water discharge pump 15 pumps the rainwater accommodated in the pretreatment chamber 11 and the filtration tank 20 after the rainwater is finished, and discharges the rainwater to the sewage pipe through the formation of a vortex.

The screen 17 makes it possible to remove coarse impurities.

To this end, the screen 17 may include a perforated network 17a provided with a plurality of holes spaced apart from each other.

In addition, the pretreatment chamber 11 may include a partition wall 10a for distinguishing and accommodating rainwater from which coarse impurities are filtered out by the screen 17 from rainwater before passing through the screen 17 . The barrier rib 10a may be formed to extend between the screen 17 and the bottom of the pretreatment chamber 11, for example.

Rainwater from which coarse impurities have been filtered by the partition wall 10a and the screen 17 is received in an outflow space 10b separate from rainwater introduced before passing through the screen 17, and the filtration chamber 20a of the filtration tank 20 ) can be supplied.

In addition, the partition wall 10a has a discharge door 10c, as shown in FIG. 2C, so that the sludge from the filtration tank 20 can flow into the pretreatment tank 10.

Referring to FIG. 1B , rainwater passing through the screen 17 flows to the lower right side of the pretreatment chamber 11 and flows into the filtration chamber 20a through an inlet of the filtration tank 20 described later.

In this way, the pretreatment tank 10 of the present invention layers and separates the sedimentary solids at the bottom through the sedimentation process, separates the coarse impurities by the screen 17, and then allows rainwater to flow into the filtration tank 20. do.

Meanwhile, the pretreatment tank 10 may further include a screen cleaning member 18 .

At least a portion of the screen cleaning member 18 moves relative to the screen 17 and allows the perforated net 17a of the screen 17 to be washed.

In the present invention, by means of the screen cleaning member 18, foreign substances or coarse impurities adhering to the screen 17 can be separated from the screen 17, thereby improving excellent flow performance through the screen 17. can improve

The screen cleaning member 18 may include an air suspension device 18a and a cleaning brush 18b.

The air suspension device 18a receives air generated from the air blower 19 and adjusts its height.

The air suspension device 18a may include a support part 18a-1, a variable-height wrinkle part 18a-2, and a brush coupling part 18a-3.

The support part 18a-1 may be provided on one side of the air suspension device 18a so as to relatively fix the air suspension device 18a to the screen 17.

For example, the support portion 18a-1 may be fixedly coupled to a bracket 18c to be described later.

The height-variable pleats 18a-2 have a space in which air is accommodated, and can be deformed to have a variable height as they expand or contract according to the amount of air accommodated therein.

Referring to FIG. 2F , the variable-height wrinkled portion 18a-2 is formed in a corrugated shape on the outer circumference, and preferably has a structure advantageous to deformation.

The inside of the variable-height wrinkled portion 18a-2 communicates with the blower connecting pipe 19a.

Due to this, the height-variable corrugated portion 18a-2 may be deformed to increase in height by accommodating air introduced from the air blower.

Conversely, the height-variable corrugated portion 18a-2 may be deformed to decrease in height by discharging air by negative pressure from an air blower.

A cleaning brush 18b is fixedly installed on one side of the air suspension device 18a.

For example, the cleaning brush 18b may be fixedly coupled to the top of the air suspension device 18a.

The brush coupling part 18a-3 is disposed on one side of the variable-height wrinkle part 18a-2 and supports the cleaning brush 18b.

The cleaning brush 18b moves together with the air suspension device 18a to make the screen 17 washable.

In FIG. 2F , the cleaning brush 18b may be fixed to the brush coupling part 18a-3 of the air suspension device 18a.

More specifically, the cleaning brush 18b is coupled to the cleaning support 18b-1 coupled to the air suspension device 18a, and coupled to the cleaning support 18b-1 to contact the perforated network 17a of the screen 17. It may include a brush unit (18b-2) for cleaning by washing.

The cleaning support 18b-1 is coupled to one side of the air suspension device 18a. For example, the cleaning support part 18b-1 may be coupled to the brush coupling part 18a-3. The cleaning support part 18b-1 may be coupled to the air suspension device 18a (for example, the brush coupling part 18a-3) in various ways such as clips, bolts, or welding.

The brush unit 18b-2 is coupled to the cleaning support unit 18b-1 and moves together with the cleaning support unit 18b-1 to clean the screen 17.

The brush unit 18b-2 preferably has a predetermined strength so as to be able to wash dust or foreign substances attached to the screen 17.

The height of the cleaning brush 18b is adjusted by the air suspension device 18a, more specifically, the height-variable pleats 18a-2, and as a result, the relative position with respect to the screen 17 is adjusted, and the screen ( 17) to be washable.

More specifically, as the height of the cleaning brush 18b is adjusted by the air suspension device 18a, the brush causes friction in the perforated network 17a of the screen 17, and between the perforated network 17a of the screen 17 Dust or foreign matter attached to the brush is washed away.

For example, the cleaning brush 18b may be installed on the outer circumference of the screen 17 so that the cleaning portion contacts the screen 17 . Due to this, it is easy to clean foreign substances and the like attached to the outer circumference of the screen 17 .

In addition, it is preferable that the cleaning brush 18b may have a cross section matching the shape of the screen 17, so that cleaning performance can be maximized.

The screen cleaning member 18 may further include a water washing unit 18d that is coupled to the air suspension device 18a to move relative to the screen 17 and allows the screen 17 to be washed with water.

For example, the water washing unit 18d is coupled to the air suspension device 18a so as to move relative to the screen 17, and communicates with the washing pipe unit 38a to receive water. The water washing pipe 18d-1 ) and a water washing nozzle 18d-2 provided in the water washing pipe 18d-1 to spray water to the screen 17.

2c to 2f, a water washing pipe 18d-1 communicating with the washing pipe part 38a and a water washing nozzle 18d-2 are provided at the end of the water washing pipe 18d-1. An example is shown.

Meanwhile, as will be described later, a connection pipe 18e may be connected between the washing pipe part 38a and the water washing pipe 18d-1.

The water washing pipe 18d-1 is preferably spaced apart from the screen 17 at a predetermined interval to maximize water spraying performance.

The water cleaning unit 18d may be coupled to the air suspension unit 18a so as to be separated from the cleaning brush 18b by a predetermined interval.

Since the screen cleaning member 18 further includes a water washing part 18d, the screen 17 is cleaned by the washing brush 18b and at the same time, the screen 17 is cleaned by water spray by the water washing part 18d. can be washed together.

Since fine dust and the like can be neatly removed by the water washing unit 18d, washing efficiency can be further maximized.

The screen cleaning member 18 may further include a bracket 18c for supporting and fixing the support portion 18a-1 at a position adjacent to the screen 17.

The bracket 18c may be disposed adjacent to the screen 17. For example, the bracket 18c may be coupled to an upper portion of the partition wall 10a, as shown in FIG. 2C. In addition, the screen 17 may be provided above the barrier 10a of FIG. 2C.

However, the screen cleaning member 18 is not necessarily limited to being coupled by the bracket 18c, and may be coupled adjacent to the screen 17.

On the other hand, the non-point pollution reduction device 100 of the present invention may further include an air blower 19 and a blower connection pipe 19a.

The air blower 19 generates a flow of air by receiving power from the power supply unit. A blower connecting pipe 19a is connected to the air blower 19, and the blower connecting pipe 19a has a flow path for supplying air generated by the air blower 19 to the air suspension device 18a.

In addition, the blower connection pipe 19a may also be connected to the air washing pipe 21 to enable backwashing of air through the washing nozzle 21a in the filtration chamber 20a.

The filtration tank 20 enables the removal of fine solids and suspended solids that are not removed through the pretreatment performed in the pretreatment tank 10 with a filter medium through an upstream fluid flow.

In more detail, in the filtration tank 20, rainwater introduced to the screen 17 of the pretreatment tank 10 passes through the perforated net 17a of the screen 17, and the pretreatment tank 10 and the lower inlet 25 of the filtration tank 20 Rainwater flows into the filtration tank 20 through ).

The filtration tank 20 may include a filtration chamber 20a, a water washing pipe 33a, an air washing pipe 21, a sludge transfer pipe 21f, and a sludge guide 27.

The filtration chamber 20a is configured to receive rainwater that has passed through the pretreatment tank 10 therein.

The air washing pipe 21 may be installed in the lower part of the filtration chamber 20a. In addition, referring to FIG. 1B, the air washing pipe 21 is connected to the blower connection pipe 19a, receives air from the air blower 19 and blows it through the washing nozzle 21a, thereby “backwashing the air” ” can be made possible.

In addition, a plurality of air washing pipes 21 may be formed that are spaced apart from each other, and for example, as shown in FIG. 2A , the air washing pipes 21 may be arranged parallel to each other.

Washing nozzles 21a may be installed in each air washing pipe 21 to enable “air” back flushing.

In the present invention, the washing nozzle 21a may be understood as a nozzle for spraying air, and the air washing pipe 21 connected to the washing nozzle 21a may be referred to as a diffuser. The air washing pipe 21 may be connected to the blower connection pipe 19a.

The non-point pollution reduction device 100 of the present invention may further include a lower sludge transfer pipe 21f and a water washing nozzle unit 21g.

The lower sludge transfer pipe 21f is installed inside the filtration chamber 20a and can provide sprayable water to the water washing nozzle 21g. For example, the lower sludge transfer pipe 21f may be formed to communicate with the washing pipe part 38a to receive water.

The water washing nozzle unit 21g is configured to inject water to enable transport of the sludge to the lower portion of the filtration chamber 20a.

When the water washing nozzle part 21g sprays water, the sludge in the lower part of the filtration chamber 20a can be transported forward.

Meanwhile, a washing pipe part 38a may be connected between the water washing nozzle part 21g and the lower washing pump 38. As shown in FIGS. 1B and 2B , the washing pipe part 38a extends in the vertical direction based on the side surface, and three examples are shown.

In addition, as shown in FIG. 2B, a connection pipe 18e enabling communication with the water washing pipe 18d-1 may be connected to the washing pipe part 38a.

The sludge induction guide 27 may be provided at the lower end of the filtration chamber 20a. As shown in FIG. 2A, the sludge guide 27 extends from the inner lower end of the filtration chamber 20a of the filtration tank 20 toward the inside to prevent sludge Guides the filtration chamber 20a so as to flow from the inner bottom to the inside.

In addition, for the flow of sludge, the inner lower surface of the filtration chamber 20a may be formed to be inclined in the flow direction of the sludge.

For example, the lower end of the filtration chamber 20a may be formed such that the right side is higher than the left side in FIGS.

The filtration chamber 20a may include a sludge guide 27 to guide the sludge to flow inwardly from the bottom of the filtration chamber 20a.

The treated water tank 30 collects and discharges the treated water during filtration, and sends the treated water to the filtration tank 20 using the backwash pump 33 during backwashing so that it can be used for water washing.

The treated water tank 30 may include a treated water tank 30 connection part and an outflow pipe 35 .

For example, treated water that has passed through the filtration tank 20 can be introduced into the treated water tank 30 through a connection portion of the treated water tank 30 at the top of the filtration tank 20 .

One side of the outflow pipe 35 is coupled to the treated water tank 30 and the other side is connected to the rainwater manhole, so that a certain water level or higher is stored in the treated water tank 30, and the remaining treated water is discharged through the outflow pipe 35. Through this, it is discharged into the rainwater manhole.

Figure 3 is a plan view showing the treatment process of the present invention, Figure 4 is a side cross-sectional view showing the treatment process of the present invention.

Referring to Figs. 3 and 4, the processing steps performed by the non-point pollution reduction device 100 of the present invention will be described.

First, when the initial rainwater flows into the non-point pollution reduction facility through the inlet pipe 13, sufficient residence time in the pretreatment tank 10 is secured to remove the sedimentary solids contained in the initial rainwater, and the coarse impurities are removed through the screen 17. Remove

Thereafter, the precipitate, such as sediment, is moved to the filtration tank 20 through the opening at the lower end of the rear end of the screen 17 after sediment separation, and finally, the rainwater introduced into the lower part of the filtration tank 20 passes through the filter media layer in an upward flow, Even the fine solids in the rainwater are removed, and the treated water moves to the treated water tank 30 and is finally discharged through the outlet pipe 35.

5 is a cross-sectional side view illustrating a process in which initial rainwater is introduced into the pretreatment tank 10, and FIG. 6 is a filtration tank 20 through the screen 17 and the lower inlet 25 of the pretreatment tank 10. 7 is a side cross-sectional view showing a process in which rainwater flows into the treatment tank 30 after passing through the filtration tank 20.

8 is a cross-sectional side view illustrating a process in which treated water is discharged at a certain water level or higher, and FIG. 9 is a process in which rainwater is accommodated in the pretreatment tank 10, the filtration tank 20, and the treated water tank 30 after rainfall has ended. 10 is a side cross-sectional view showing a primary stagnant water discharge process.

Meanwhile, FIG. 11 is a side cross-sectional view showing a process of air backwashing using a blower, FIG. 12 is a side cross-sectional view showing a process of discharging secondary stagnant water, and FIG. 13 is a side cross-sectional view showing a process of water washing. am. 14 is a side cross-sectional view showing a third/fourth backwash discharge water discharge process.

Hereinafter, with reference to Figs. 5 to 14, the operation of the non-point pollution reduction device 100 of the present invention from the occurrence of rain to the end will be described.

Referring to FIG. 5 , when initial rainwater flows into the pretreatment chamber 11 in the pretreatment tank 10, it fills up to the surface of the lower part of the screen 17.

Thereafter, the rainwater introduced to the screen 17 of the pretreatment tank 10 passes through the perforated net 17a of the screen 17 and passes through the pretreatment tank 10 and the inlet 25 at the bottom of the filtration tank 20 to the filtration tank ( 20) is shown in FIG. 6.

Referring to FIG. 7 , treated water that has passed through the filtration tank 20 flows into the treated water tank 30 through the connection portion of the treated water tank 30 at the top of the filtration tank 20 .

In addition, a certain water level or higher is stored in the treated water tank 30, and the remaining treated water is discharged to the rainwater manhole through the outflow pipe 35 (FIG. 8).

As shown in FIG. 9 , rainwater is accommodated in the pretreatment tank 10 , the filtration tank 20 , and the treatment water tank 30 after the rainfall is finished.

Regarding the primary stagnant water discharge process, it can be understood as a process of discharging stagnant water in order to perform backwashing after the end of rainfall.

In addition, referring to FIG. 10 , in the first step of discharging stagnant water, for example, the stagnant water discharge pump of the pretreatment tank 10 is operated to discharge the stagnant water to the upper end of the filtration tank 20, and then the pump operation is stopped.

After that, referring to FIG. 11 , the air backwashing process may be performed so that the air flowing through the air blower is ejected through the air washing pipe 21 and the washing nozzle 21a.

At this time, the screen 17 is automatically cleaned by the screen 17 cleaning member. More specifically, when air from the air blower 19 is injected into the air suspension device 18a, the relative height of the air suspension device 18a is adjusted, and the cleaning brush 18b coupled thereto moves to move the screen 17. To wash the perforated net (17a) of.

The secondary stagnant water discharge process is a process of discharging all of the stagnant water in the pretreatment tank 10 and the filtration tank 20 after air backwashing is finished.

Referring to FIG. 12, in the secondary stagnant water discharge process, the stagnant water discharge pump 15 is operated to discharge all of the stagnant water in the pretreatment tank 10 and the filtration tank 20, and then the pump is stopped.

Referring to FIG. 13 , in the water washing process, water washing may be performed using a backwash pump 33 provided in the treatment water tank 30 and a water washing pipe part 33a connected thereto.

14 shows the 3rd and 4th backwash discharge water discharge processes.

The third backwash wastewater discharge process is a process of discharging all of the backwash wastewater in the pretreatment tank 10 and the filtration tank 20 after water washing is finished.

In addition, when the stagnant water discharge pump 15 is operated during the tertiary backwash wastewater discharge process to discharge all of the backwash wastewater in the pretreatment tank 10 and the filtration tank 20, the operation of the pump is stopped.

After the tertiary backwashing, water can be simultaneously sprayed to the screen washing pipe connected to the screen washing pipe connected to the lower washing pump and the lower washing process of the filtration tank. At this time, the air blower 19 is also operated, so that the secondary up and down cleaning of the air suspension device 18a can be performed.

The fourth backwash wastewater discharge process is a process of discharging the entire amount of backwash wastewater after the water washing of the lower portion of the filter tank 20 is finished.

15 is a process piping instrumentation diagram (P&ID) showing a filtration process, FIG. 16 is a process piping instrumentation diagram (P&ID) showing a first stagnant water discharge process, and FIG. 17 is a process piping instrumentation showing an air backwash process. It is also (P&ID). In addition, FIG. 18 is a process piping instrumentation diagram (P&ID) showing the secondary stagnant water discharge process, and FIG. 19 is a process piping instrumentation diagram (P&ID) showing the process of discharging water backwashing and tertiary backwash discharge water. 20 is a process piping instrumentation diagram (P&ID) showing a process of transferring and discharging the sludge at the bottom of the filter tank 20 to the pretreatment tank 10 through the progress of washing the bottom of the filter tank 20.

15 to 20, the automatic control panel 40 includes first to third water level sensors 41c, a stagnant water discharge pump 15, an air blower 19, a backwash pump 33, and a bottom washing unit. It can be electrically connected with the pumps 38, so as to control each of them.

Referring to FIG. 16, in the first stagnant water discharge process, the first water level detection sensor 41a of the pretreatment tank 10 is detected and 24 hours later, the stagnant water discharge pump 15 operates, and the second water level detection sensor ( 41b) allows stagnant water to be discharged up to (the top of the filter tank 20).

In the air backwashing process of FIG. 17, when a signal from the second water level sensor 41b of the pretreatment tank 10 is detected, the operation of the stagnant water discharge pump 15 is stopped and the air blower 19 is operated for 10 minutes. can

The air blower 19 may be, for example, a blower.

In the process of automatically cleaning the screen 17, air is injected into the air suspension device and the brush attached to the suspension device cleans the screen 17 through the elevation of the suspension device.

Referring to FIG. 18, in the secondary stagnant water discharge process, when the blower (M-4) is stopped by the timer, the stagnant water discharge pump (M-1) is restarted and the bottom (third water level) of the pretreatment tank (10) The stagnant water is discharged to the detection sensor 41c) and the operation is stopped.

19 shows a water washing process and a third backwash discharge water discharge process.

In the water washing process, when the secondary stagnant water discharge is stopped, the backwash pump 33 (M-2) is operated, and after one minute of operation, the backwash pump (33) (M-2) is stopped.

In addition, in the third backwash wastewater discharge process, when the backwash pump 33 (M-2) is stopped, backwash wastewater discharge starts, and the water level of the third water level sensor 41c of the pretreatment tank 10 is reached. Then, the stagnant water discharge pump 15 (M-1) is stopped and the system is initialized.

The backwash pump 33 may be, for example, a backwash pump.

Further, in the process of washing the lower part of the filter tank 20, the lower part of the filter tank 20 is washed using the lower washing pump 38 provided in the treated water tank 30. By the process of washing the bottom of the filter tank 20, the sludge under the filter tank 20 is transferred to the pretreatment tank 10.

The non-point pollution reduction device 100 described above is not limited to the configuration and method of the embodiments described above, but the embodiments may be configured by selectively combining all or part of each embodiment so that various modifications can be made. there is.

It is apparent to those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit and essential characteristics of the present invention. Accordingly, the above detailed description should not be construed as limiting in all respects and should be considered illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention.

100: non-point pollution reduction device
10: pretreatment tank 11: pretreatment chamber
13: inlet pipe 15: discharge pump
17: screen 17a: perforated net
10a: bulkhead 10b: outflow space
10c: discharge door 18: screen cleaning member
19: air blower 19a: blower connection piping
18a: air suspension 18a-1: support
18a-2: Height-variable wrinkle portion 18a-3: Brush coupling portion
18b: washing brush 18b-1: washing support
18b-2: brush part 18c: bracket
18d: water washing part 18d-1: water washing pipe
18d-2: water washing nozzle 18e: connection pipe
20: filtration tank 20a: filtration chamber
21: air washing pipe 21a: washing nozzle
25: inlet 27: sludge induction guide
30: treatment water tank 30a: treatment chamber
33: backwash pump 33a: water washing pipe
35: outflow pipe 38: lower wash pump
38a: washing pipe part
40: automatic control panel
41a: first water level detection sensor 41b: second water level detection sensor 41c: third water level detection sensor

Claims (11)

A pretreatment chamber, an inlet for receiving and supplying initial rainwater to the pretreatment chamber, and a screen installed in the pretreatment chamber for filtering out foreign substances in the initial rainwater, wherein the initial rainwater is pretreated in the pretreatment chamber. a pre-treatment tank;
a filtration tank having a filtration chamber connected to the pre-treatment tank and enabling removal of fine solids and suspended solids not removed through the pre-treatment performed in the pre-treatment tank;
A treated water tank that collects and discharges the treated water during filtration and sends the treated water to the filtration tank during backwashing to enable water washing; and
A screen cleaning member installed in the pretreatment chamber and at least partially moving relative to the screen to enable cleaning of the screen;
The screen cleaning member,
an air suspension device that is connected to the screen and receives air generated from an air blower and adjusts its height; and
A cleaning brush coupled to the air suspension to move relative to the screen to enable cleaning of the screen;
The air suspension device,
a support provided on one side of the air suspension device to relatively fix the air suspension device to the screen;
A height-variable pleat portion having a space for receiving air therein and expanding or contracting according to the amount of air accommodated therein so that the height thereof is variable; and
Disposed on one side of the variable-height wrinkle part, non-point pollution reduction device including a brush coupling portion capable of supporting a cleaning brush.
delete According to claim 1,
The screen cleaning member,
Further comprising a water washing unit coupled to the air suspension to move relative to the screen and enabling water washing of the screen;
The water washing unit,
a water washing pipe that is coupled to the air suspension device to move relative to the screen and communicates with the washing pipe part to receive water; and
A device for reducing non-point pollution comprising a water washing nozzle provided in the water washing pipe and configured to spray water to the screen.
delete According to claim 1,
The air suspension device,
Non-point pollution reduction device further comprising a bracket for supporting and fixing the support at a position adjacent to the screen.
According to claim 5,
The pretreatment chamber is provided with a partition wall for distinguishing and accommodating rainwater from which coarse impurities are filtered out by the screen from rainwater before passing through the screen;
The screen is provided on an upper portion of the barrier rib, and the bracket is provided on an upper portion of the barrier rib to be adjacent to the screen.
According to claim 1,
The washing brush,
a cleaning support coupled to one side of the air suspension device; and
Non-point pollution reduction device including a brush that is fixedly coupled to the cleaning support and moves together to clean the screen.
A pretreatment chamber, an inlet for receiving and supplying initial rainwater to the pretreatment chamber, and a screen installed in the pretreatment chamber for filtering out foreign substances in the initial rainwater, wherein the initial rainwater is pretreated in the pretreatment chamber. a pre-treatment tank;
a filtration tank having a filtration chamber connected to the pre-treatment tank and enabling removal of fine solids and suspended solids not removed through the pre-treatment performed in the pre-treatment tank;
A treated water tank that collects and discharges the treated water during filtration and sends the treated water to the filtration tank during backwashing to enable water washing; and
A screen cleaning member installed in the pretreatment chamber and at least partially moving relative to the screen to enable cleaning of the screen;
The screen cleaning member,
an air suspension device that is connected to the screen and receives air generated from an air blower and adjusts its height; and
A cleaning brush coupled to the air suspension to move relative to the screen to enable cleaning of the screen;
An air blower generating a flow of air by receiving power from the power supply unit; and
Non-point pollution reduction device further comprising a blower connection pipe connected to the air blower and having a flow path for providing air generated by the air blower to an air suspension device.
According to claim 1,
The cleaning brush is a device for reducing non-point pollution having a cross section of a shape matched with the screen.
According to claim 1,
The filtration tank,
a filtration chamber having an inlet into which rainwater that has passed through the pretreatment tank is introduced and accommodating the inflowed rainwater;
a water washing tube unit installed above the filtration chamber;
an air washing pipe installed at a lower part of the filtration chamber, provided with a washing nozzle receiving air from an air blower and discharging air to enable air backwashing;
a sludge conveying pipe installed below the filtration chamber and having a water washing nozzle part for spraying water to allow the sludge to flow; and
Non-point pollution reduction device including a sludge guide guide provided at a lower end of the filtration chamber and extending toward the inside to guide the sludge to flow from the lower end inside the filtration chamber to the inside.
According to claim 10,
The inner lower surface of the filtration chamber is formed along the flow direction of the sludge non-point pollution reduction device.

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