KR101917632B1 - water treatment media and manufacturing method thereof and treatment apparatus for non-point source contaminant - Google Patents

Abstract

The present invention relates to a water treatment filter medium, a manufacturing method thereof, and a non-point pollutant treatment device using the same. More specifically, the present invention relates to a water treatment filter medium which can perform stable filtration and backwash; a manufacturing method thereof; and a non-point pollutant treatment device using the water treatment filter medium to have excellent non-point pollutant treatment efficiency. The water treatment filter medium includes: a body formed of a synthetic resin, and having a hollow space therein and a plurality of distribution halls; and an exposed member attached to the surface of the body to be exposed to the outside, formed of at least one inorganic material selected from loess powder and sand, and having the specific gravity of 1.05 to 1.2.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a water treatment media, a method of manufacturing the same, and a non-point source contaminant treatment method using the same.

The present invention relates to a water treatment filter medium, a method for producing the same, and a non-point pollution source treatment apparatus using the same, and more particularly, to a water treatment filter material capable of stable filtration and backwashing, And a pollution source treatment apparatus.

In general, a filtration process is a process of introducing raw water containing suspended solids into a filtration device to discharge clean treated water from which suspended solids (SS) have been removed. The suspended solids in the raw water are sieved, It is a process that removes by complex mechanism such as sedimentation, inertial collision, blocking, adsorption and aggregation, and discharges only clean water as treatment water.

When the filtration process is continued, the pores in the filtration layer are gradually filled with cohesive fine flocs or suspended substances, and the filtration resistance is increased, so that the filtration process can no longer be continued. In this case, Lt; RTI ID = 0.0 > a < / RTI >

The filter material used in the filtration apparatus is widely used in the water treatment field because it is light in weight, high in strength, durable, strong in chemical resistance and relatively stable in price.

Since detention by attachment on the surface of the filter media is a major factor of the filtration action, the filtration device has a better filtration efficiency as the surface area of the filtration layer is wider and it is possible to smoothly perform the filtration action so that as many dust particles adhere to the surface of the filter material as possible have.

On the other hand, non-point pollution sources are cities, roads, farmland, mountainous areas, construction sites, etc., which are sources of water pollutants that are unspecified at unspecified locations. Unlike point source pollutants, which are easy to collect and easy to dispose of because pollutant outflow and discharge routes are clear, non-pollutant pollutants are difficult to collect because pollutant discharge and discharge routes are not clearly distinguished, It is more difficult to design and maintain the abatement facility.

The initial rainfall is called initial rainfall. The initial rainfall has the effect of cleansing the surface pollutants, making the roads and grounds clean. In the initial rainfall, however, there are many pollutants such as organic substances and heavy metals. The pollutants contained in non-point pollution sources are various such as soil, nutrients, bacteria and viruses, oil and grease, metals, and organic substances. Most of the non-point pollutants that are generated enter rainwater along with rivers or oceans, .

A non-point pollution source treatment facility refers to a facility that collects, processes, and discharges such non-point pollution sources to rivers or the sea. Point pollution source treatment facilities have relatively stable inflows and do not have a large variation in pollutant concentration, so there is no great difficulty in biological treatment. However, nonpoint pollution sources have a variety of paths and vary in the amount of runoff depending on precipitation There are difficulties.

Facilities for the treatment of pollutants with nonpoint pollution sources include reservoir type, permeation type, vegetation type, device type, and treatment type, each having advantages and disadvantages. The reservoir type and the infiltration type are methods in which the initial rainfall is temporarily stored and then slowly flowed into the river or the ground. On the other hand, vegetation type is a method of inducing infiltration and decomposition by plants by introducing initial rainfall into a vegetation channel, and it is a nature-friendly method, but a lot of area is required. The device type is a method of removing pollutants through a physical treatment facility such as a filtration device or a screen, which requires a higher initial construction cost and requires continuous maintenance such as cleaning or screen replacement, but has a higher effect of reducing pollutants . The treatment type is the most complicated form, and it is a method of installing biological treatment devices using chemical coagulation, sedimentation or microorganisms. It can secure stable treated water quality, but it has high initial installation cost and maintenance difficulty.

The filtration type non-point pollution treatment apparatus is a type of apparatus-type abatement facility, and by filtering the suspended substances in the wastewater by introducing the wastewater into the filtration layer filled with a filter material such as a cotton ball, porous fiber or porous sponge, It is a facility to prevent water pollution caused by pollutants being directly discharged into rivers or lakes. The filter media forms a small gap between them, and the wastewater escapes through the small pore, where the contaminants larger than the pore are filtered out by the sieve action. In addition, the adsorption or precipitation of fine contaminants on the surface of the filter media or the filter media also removes the particles.

As the filtration continues, the pores gradually clog, the filtration resistance increases, and the water pressure rises. In this process, the pollutants that have already been adsorbed or sieved are re-leached. Therefore, filtration must periodically clean the filter media, which is called cleaning or backwashing.

Most filtering devices are backwashed by inflowing water or water and air from the bottom to the top by backwashing. The backwash efficiency is determined by how well the adsorbed contaminants are removed from the filter media. The greater the fluidity of the filter media, the more the backwash efficiency increases and the water consumption required for backwashing is reduced.

However, if the specific gravity of the filter medium is greater than 1, the filter medium accumulates on the bottom of the filter medium. Therefore, even if the filter medium is backwashed, there is a disadvantage in that the flowability of the filter medium is reduced and the time and water are required for cleaning. For example, sand, which is the most commonly used filter medium, has a specific gravity of 2.6 or more and is much larger than water. In addition, the cotton ball or the porous fiber material has a specific gravity smaller than 1, so that it is difficult to back-wash the filter material because it always floats on the water.

Therefore, when the backwash is performed, the fluidity of the filter material has the greatest influence on backwash efficiency, backwash water consumption, and backwash time.

Korean Patent Registration No. 10-1242275 discloses a non-point pollution abatement facility capable of early storm separation, automatic backwash and stagnant water discharge.

The non-point pollution abatement facility has a retrofit for backwashing the first filtration layer, but has a problem that the backwashing effect is very low because the filter materials constituting the filtration layer are densely packed together.

1. Korean Registered Patent No. 10-0749538: Pellet type fiber material having three-dimensional pore structure and fluidity 2. Korean Registered Patent No. 10-1242275: Non-point pollution abatement facility capable of early storm separation and automatic backwash and stagnant water discharge

The present invention has been made to solve the above-mentioned problems, and provides a water treatment filter material which is floated on the bottom during filtration and is capable of flowing in water during backwashing, and is excellent in filtration and backwashing efficiency, and a method for producing the same. .

It is also an object of the present invention to provide a non-point pollution source treatment device capable of swirl-type backwashing suitable for use of such filter media.

To achieve the above object, the water treatment filter of the present invention comprises: a spherical body formed of a synthetic resin and having a hollow interior and a plurality of flow holes; And an exposed member attached to the surface of the body and exposed to the outside, the exposed member being made of any one of an inorganic material such as loess powder and sand, and has a specific gravity of 1.05 to 1.2.

The body includes a main body and a sub body accommodated in the main body and formed to be smaller than the main body so as to flow inside the main body.

In order to accomplish the above object, the present invention provides a method for manufacturing a water treatment filter material, comprising the steps of: applying a pressure-sensitive adhesive to an inner circumferential surface of a cavity of a mold; Attaching any one of the inorganic material of the loess powder and the sand to the inner circumferential surface of the cavity; Injecting molten synthetic resin into the cavity to injection-mold a hemispherical molded body having a hollow interior and a plurality of flow holes formed therein; Two injection-molded compacts are prepared and joined to obtain a spherical filter material having a specific gravity of 1.05 to 1.2.

According to another aspect of the present invention, there is provided a non-point source treatment apparatus comprising: a treatment tank; An excellent inflow tube installed at an upper portion of the treatment tank for introducing rainwater into the treatment tank; A filtration unit installed inside the treatment tank to remove a nonpoint source of pollution introduced into the treatment tank; A discharge tube installed in the treatment tank so that the stormwater can be discharged to the outside through the filtration unit; And a backwashing means for backwashing the filtration unit, wherein the filtration unit comprises: a lower net body spaced apart from the bottom of the treatment tank; an upper net body spaced upwardly from the lower mesh body; And a plurality of filter media formed on the filter media, the filter media being formed of a synthetic resin and having a hollow interior and a plurality of flow holes formed in the filter medium, And an exposure member which is exposed to the outside and is made of an inorganic material selected from the group consisting of loess powder and sand, and the specific gravity is 1.05 to 1.2.

The backwash means includes a ground portion movable by a vehicle and a ground portion installed in the treatment tank and connected to the ground portion.

Wherein the supporting portion includes a washing and inflowing inlet pipe for introducing washing water into the treating tank and connected to a lower portion of the treating tank so that the washing water can be pivoted while flowing into the treating tank, And a drain pipe connected to a lower portion of the processing tank, wherein the flow promoting unit includes a filtration unit that is connected to an upper portion of the filtration unit, A rotary shaft installed in the processing vessel so as to pass through the upper and lower portions, and a rotary blade coupled to the rotary shaft so as to be located in the filter material accommodation space.

Wherein the flow promoting unit further includes a collapsing portion for moving up the filter media by collapsing the filter material layer while moving up and down in the filter material accommodating space when the rotation shaft rotates, and the collapsing portion includes a screw portion formed on the rotation shaft, A lifting vane coupled to the lifting ring and positioned below the rotary vane; a lifting vane extending vertically up and down to be parallel to the rotating shaft, the lifting vane being inserted into the insertion hole formed in the lifting vane, And a guide bar for guiding up and down movement.

The ground portion includes a solid-liquid separator for storing wash water, a backwash pump for pumping wash water from the solid-liquid separator, a first connection pipe for connecting the backwash pump to the wash water inflow inlet, A circulation pump connected to the second connection pipe for introducing wash water passed through the treatment tank into the solid-liquid separation tank; and an actuator for transmitting power to the flow promotion unit.

As described above, according to the present invention, an inorganic material such as yellow soil or sand is adhered to the surface of a spherical filter material formed of a synthetic resin to improve the filtration performance. At the same time, So that it is possible to provide a water treatment filter material excellent in filtration and backwashing efficiency.

 In addition, the backwash efficiency can be greatly increased by increasing the floating property of the filter material by promoting the flow of the filter material during backwashing.

In addition, since the washing water can be continuously circulated while being subjected to solid-liquid separation during backwashing, water consumption is small. Also, since the filter material can be cleaned while moving using the vehicle, the maintenance can be facilitated and the device can be simplified.

1 is a perspective view illustrating a water treatment filter according to an embodiment of the present invention,
Fig. 2 is a sectional view of Fig. 1,
3 is a cutaway perspective view showing a state of a water treatment filter according to another example of the present invention,
FIG. 4 is a block diagram showing steps of a method of manufacturing a water treatment filter according to an embodiment of the present invention.
FIG. 5 is a perspective view showing a joint of a molded product applied to the method for manufacturing the water treatment filter of FIG. 1,
FIG. 6 is a longitudinal sectional view of a non-point source pollution treatment apparatus according to an embodiment of the present invention,
FIG. 7 is a cross-sectional view of the non-point source pollution treatment apparatus of FIG. 6,
FIG. 8 is a schematic view showing a main part of a non-point pollution source treatment apparatus according to an example of the present invention,
FIG. 9 is a cross-sectional view showing the use state of the non-point pollution source treatment apparatus according to an embodiment of the present invention,
FIG. 10 is a perspective view showing an essential part of a non-point pollution source treatment apparatus according to another example of the present invention,
11 is a cutaway perspective view showing a state of a water treatment filter according to another example of the present invention.

Hereinafter, a water treatment filter according to a preferred embodiment of the present invention, a method for manufacturing the same, and a non-point source treatment apparatus using the same will be described.

1 and 2, the water treatment filter material 1 of the present invention is formed in a spherical shape and has a specific gravity of 1.05 to 1.2. The filter medium (1) having such a specific gravity seats on the bottom during filtration, and the backwashing effect can be improved by allowing the flow of the washing water when backwashing.

The water treatment filter material 1 according to an embodiment of the present invention comprises a spherical body 3 and an exposed member 7 attached to the surface of the body 3.

The body (3) is formed of a synthetic resin. A thermoplastic resin can be used as the synthetic resin. The filter material (1) is easy to adsorb pollutants, has little wear on the flow friction during backwashing, and can retain the original shape even in repeated backwashing. For this purpose, it is preferable to use ABS (Acrylonitrile-Butadiene-Styrene) resin as the thermoplastic resin.

ABS resin has excellent tensile strength and impact strength. In particular, the ABS resin has a specific gravity of about 1.04 to 1.15 and is slightly larger in specific gravity than water, and thus is suitable as a material of the body 3 suitable for the characteristics of the present invention.

The body (3) has an empty sphere inside. A plurality of flow holes 5 are formed in the body 3. The inside and the outside of the body (3) are connected by the flow hole (5). The body 3 having such a structure has a large surface area relative to the volume, which is advantageous for the removal of contaminants and can form a gap of a certain size between the bodies 3 when they are close together.

The outer diameter of the body 3 may be 15 to 25 mm. The size of the body 3 is also an important factor in filtration. If the size of the body 3 is too small, it is likely to be discharged together with the washing water during backwashing. In contrast, if the size of the body 3 is too large, the air gap created by the filter material becomes too large and the removal rate of contaminants becomes low. Therefore, the outer diameter of the body 3 is preferably 15 to 25 mm for an appropriately sized filter medium.

An exposed member 7 is attached to the surface of the body 3. The exposed member 7 is made of any one of an inorganic material such as yellow clay powder and sand.

The loess powder or sand may be about 100 to 300 mesh in particle size. The inorganic material may be used in a proportion of 2 to 8 parts by weight based on 100 parts by weight of the synthetic resin.

The exposed member 7 is irregularly distributed on the surface of the body 3. [ As shown in FIG. 2, each exposed member 7 in the form of particles is buried in the interior of the body 3 and the upper portion is exposed to the outside of the surface of the body 3.

Thus, the exposed member 7 distributed on the surface of the body 3 serves to increase the surface area of the body 3. Further, the exposed member 7 made of loess or sand is exposed to the surface of the body to increase the adsorption power of the pollutant.

A water treatment filter according to another example of the present invention is shown in Fig.

Referring to FIG. 3, the illustrated body has a dual structure of two bodies.

That is, the body includes the main body 3 and the sub-body 9. The sub-body 9 is smaller in size than the main body 3 and is accommodated in the main body 3. The main body 3 may have an outer diameter of 15 to 25 mm, and the sub-body 9 may have an outer diameter of 10 to 20 mm.

The outer diameter of the sub-body 9 is formed to be about 2 to 6 mm smaller than the inner diameter of the main body 3. Therefore, the sub-body 9 accommodated in the main body 3 is not fixed to the inside of the main body 3, and thus it is possible to flow itself in the main body 3 during backwashing.

As shown in FIG. 1, it is a matter of course that a plurality of flow holes are formed in each of the main body 3 and the sub body 9, and the exposed members 7 and 8 are attached to the surface.

Since the filtration mechanism of the water treatment media of the present invention is mainly carried out by adsorption and precipitation rather than body action, a shape having a maximum surface area is advantageous. Therefore, the filter material having the structure in which the sub-body 9 is accommodated in the main body 3 as shown in FIG. 3 can greatly improve the specific surface area. Particularly, since the sub-body 9 flows separately from the main body 3 and collides with the main body 3, the effect of desorbing contaminants adhered to the inside of the filter medium can be greatly enhanced during backwashing.

Needless to say, another sub-body 2 having a small diameter can be further accommodated in the sub-body 9 as shown in FIG. Thus, the illustrated body has a triple structure of three bodies.

That is, the body comprises the main body 3, the first sub-body 9 and the second sub-body 2. The first sub-body 9 is smaller than the main body 3 and is accommodated in the main body 3 and the second sub-body 2 is smaller than the first sub-body 9, 1 sub-body 9, as shown in Fig.

The main body 3 may have an outer diameter of 15 to 25 mm, the first sub-body 9 may have an outer diameter of 10 to 20 mm, and the second sub-body may have an outer diameter of 5 to 15 mm.

It is a matter of course that a plurality of flow holes are formed in each of the main body 3 and the first and second sub-bodies 9 and 2, and an exposure member is attached to the surface.

Hereinafter, a manufacturing method for producing the above-mentioned water treatment filter medium will be described with reference to Figs. 4 and 5. Fig.

A method for manufacturing a water treatment filter material according to an embodiment of the present invention includes the steps of applying a pressure-sensitive adhesive to an inner circumferential surface of a cavity of a mold, and applying an inorganic material such as loess powder or sand to the inner circumferential surface of the cavity to adhere the inorganic material to the cavity inner circumferential surface Injecting a molten synthetic resin into a cavity to injection-mold a hemispherical shaped article having an empty interior and a plurality of flow holes formed therein, preparing two injection-molded articles, and joining them to each other to obtain a spherical filter medium; .

First, a mold for injection molding is prepared. In the mold, a cavity having a shape corresponding to that of the molded body is formed.

An adhesive is applied to the inner peripheral surface of the cavity. The pressure-sensitive adhesive is intended to allow the inorganic material to adhere to the inner peripheral surface of the cavity and be fixed. Water, alcohol, and starch can be used as the adhesive. Since the pressure-sensitive adhesive is intended to fix an inorganic material in the form of small particles, it may suffice to have only a small amount of pressure-sensitive adhesive. Therefore, it is needless to say that various known pressure-sensitive adhesives can be used in addition to the pressure-sensitive adhesive described above. The pressure-sensitive adhesive can be applied by spraying on the cavity.

Next, an inorganic material is sprayed on the inner circumferential surface of the cavity to which the adhesive is applied to adhere the inorganic material.

As the inorganic material, either loess powder or sand may be used. The loess powder or sand may be about 100 to 300 mesh in particle size.

Next, molten synthetic resin is injected into the cavity to injection-mold the hemispherical shaped body 10. ABS (Acrylonitrile-Butadiene-Styrene) resin can be used as the synthetic resin.

After the injection molding, the molded body 10 is separated from the mold after cooling.

The molded body 10 thus separated is hemispherical in which the inside is hollow. Therefore, the two shaped bodies 10 are prepared and then joined to each other to obtain the spherical filter material shown in Fig. As the joining method, joining by an adhesive or joining by heat welding can be used.

Meanwhile, in order to manufacture the filter material shown in FIG. 3, two kinds of molded bodies having different sizes are prepared by injection molding in the same manner as described above. Then, two compact bodies of small size are bonded to each other, and then the two compact bodies of large size are inserted between two large-sized bodies to be bonded to each other. In this way, a dual structure filter material can be produced.

Hereinafter, the above-mentioned non-point pollution source treatment apparatus will be described in detail.

6 to 9, the apparatus for treating non-point pollution sources according to an exemplary embodiment of the present invention includes a treatment tank 20, and a treatment tank 20 installed at an upper portion of the treatment tank 20, A filtration unit 30 installed inside the treatment tank 20 to remove nonpoint source pollution introduced into the treatment tank 20 and a filtration unit 30 And a backwashing means for backwashing the filtration unit 30. The backwashing means 29 is provided in the treatment tank 20 so that the stormwater can be discharged to the outside.

The treatment tank 20 is buried in the ground. The treatment tank 20 has a hollow cylindrical shape. An opening is formed in the upper portion of the treatment tank 20. Although not shown, a lid that can be opened and closed is provided at the upper portion of the treatment tank 20 to block the opening.

A partition wall (23) is provided in the treatment tank (20). The partition wall 23 serves to partition the inside of the treatment tank 20 into a filtration space 25 and a discharge space 26. The partition 23 is formed in a circular shape. Therefore, the filtration space 25 and the discharge space 26 form concentric circles. That is, a circular filtration space 25 is formed inside the partition 23, and an annular discharge space 26 surrounding the filtration space is formed outside the partition 23.

The height of the partition wall 23 is lower than that of the storm inflow pipe 27 and higher than that of the discharge pipe 29. A communicating hole 24 for communicating the filtration space 25 and the discharge space 26 is formed in the lower portion of the partition wall 23. The stormwater flowing into the filtration space 25 can be moved to the discharge space 26 through the communication hole 24.

The storm inflow pipe (27) is installed on the upper part of the treatment tank (20). And the rainwater containing the nonpoint source is introduced into the filtration space 25 through the rainwater inflow pipe 27.

The filtration unit 30 is installed inside the partition wall 23, that is, in the filtration space 25. The filtration unit (30) removes the nonpoint source in the stormwater flowing into the filtration space (25) through the storm inflow pipe (27).

The illustrated filtration unit 30 includes a lower netting 31 spaced from the bottom of the treatment tank 23, an upper netting 33 spaced upward from the lower netting 31, And an upper layer (33), and a plurality of filter media (1) formed by laminating a plurality of filter media (1).

The lower net body 31 and the upper net body 33 are installed horizontally side by side in the filtration space 25. The lower net body 31 and the upper net body 33 are made of a mesh net structure formed by weaving wires in a net shape. The eyes formed on the lower net body 31 and the upper net body 33 are formed to be smaller than the size of the filter material 1.

The lower net member 31 and the upper net member 33 are vertically spaced. The space between the lower netting 31 and the upper netting 33 is the space for accommodating the filter media. The filter material (1) is accommodated in the filter material accommodation space.

The filter material (1) is the same as described above. Since the specific surface area of the filter medium 1 is 1.05 to 1.2, the filter medium 1 is normally deposited on the lower net body 31 and is laminated on the lower net body 31 to form a filter medium layer having a constant thickness.

The volume of the filter media accommodation space is larger than the total volume of the filter media (1). For example, the volume of the media receiving space may be 1.2 to 2 times the total volume of the media (1). This is to ensure a space where the filter media can flow during backwashing.

The stormwater introduced into the treatment tank 20 through the stormwater inflow pipe 27 passes through the filtration unit 30 and is filtered and then flows into the discharge space 26 through the communication hole 24. The discharge tube 29 is installed in the treatment tank 20 so that the stormwater flowing into the discharge space 26 rises and reaches a predetermined water level.

The discharge pipe 29 is formed to be lower than the height of the partition 23. The stormwater treated through the discharge pipe (29) is discharged to the outside.

As the filtration continues, the filtration layer gradually becomes clogged, and the filtration resistance is increased because the filtration quantity is smaller than the influent quantity. In this case, some of the stormwater flowing into the filtration space flows directly into the discharge space 26 through the partition wall 23.

The backwash means backwashes the filter material (1) to remove the foreign matter adhering to the surface of the filter material (1).

The backwashing means includes a land portion 40 which can be moved by the vehicle, and a ground portion which is provided in the treatment tank 20 and is connected to the ground portion 40.

And a flow promotion unit 50 for promoting the flow of the filter material 1 in the filter material accommodating space. The cleaning water supply inlet pipe 50 is connected to the lower part of the treatment tank 20 to introduce the washing water into the treatment tank 20, A wash water discharge pipe 53 connected to the upper portion of the treatment tank 20 and discharging the wash water passed through the filtration unit 30 and a drain pipe 55 connected to the lower portion of the treatment tank 20.

The washing / feeding inflow port 50 is connected to the lower portion of the partition wall 23 through the treatment tank 20. The end of the washing and drinking infusion inlet 50 is installed so as to face the inner side of the partition 23 so that the washing water flowing into the treatment tank 20 through the washing and infant inlet 50 can be pivoted. Therefore, the washing water traveling through the washing-and-feeding inflow pipe 50 flows into the lower portion of the filtration space 25 and turns. The circulating washing water rises and comes into contact with the filter material (1).

The upper part of the wash-water inflow inlet 50 extends to the ground. It is a matter of course that a valve for opening and closing the flow path is provided in the washing /

The washing water discharge pipe 53 is connected to the upper part of the treatment tank 20. The washing water discharge pipe 53 is connected to the upper part of the partition wall 23 through the treatment tank 20. The washing water that has passed through the filtration unit (30) is discharged through the washing water discharge pipe (53). The water discharge pipe 53 extends to the ground. The washing water discharge pipe (53) is provided with a valve for opening and closing the flow path.

The drain pipe 55 is connected to the lower portion of the treatment tank 20 and extends to the ground. The drain pipe (55) is provided with a valve for opening and closing the flow path.

The flow promoting unit serves to promote the flow of the filter material (1) in the filter material accommodation space during backwashing.

The flow promoting unit has a rotary shaft 60 installed inside the treatment tank 20 and a rotary vane 63 coupled to the rotary shaft 60 so as to be located in the filter medium accommodation space.

The rotary shaft 60 is installed to pass through the filtration unit 30 up and down. On the bottom of the treatment tank 20, a bearing unit 61 for supporting the lower end of the rotary shaft 60 is provided. The upper portion of the rotary shaft 60 extends to the ground.

The rotary vane 63 is coupled to the rotary shaft 60 and installed horizontally. The rotary blades 63 may be vertically spaced apart from each other and installed in a large number. The rotary vane 63 rotates the filter media 1 while rotating in the filter medium accommodation space by the rotation of the rotary shaft 61. When contaminants or gravels accumulate in the filtration layer, it is often difficult to flow the filter media only by the reverse water pressure. At this time, the rotating blade is very useful for flowing the filter material at the initial stage of backwashing.

The upper portion is composed of a solid-liquid separating tank 41 in which washing water is stored, a backwash pump 43 for pumping washing water from the solid-liquid separating tank 41, a first washing liquid inlet pipe 50 for connecting the backwashing pump 43 and the washing- A second connection pipe 45 connected to the connection pipe 44 and the water discharge pipe 53 and the drain pipe 55 and a second connection pipe 45 connected to the second connection pipe 45, A circulation pump 47 for introducing the liquid into the solid-liquid separation tank 41, and an actuator 49 for transmitting power to the flow promoting unit.

The solid-liquid separating tank 41 is divided into a sedimentation space 42a and a discharge space 42b by an overflow ware 42c installed therein. The solid foreign matter in the washing water flowing into the settling space 42a is settled on the bottom. As a solid foreign matter, for example, soil can be considered. The supernatant, that is, the wash water from which the solid foreign substance is removed flows into the discharge space 42b beyond the overflow ware. The washing water introduced into the discharge space 42b flows back into the interior of the treatment tank 20 through the washing and infusing inlet 50 by the backwash pump 43. [ With this solid-liquid separating tank 41, since the backwashing can be performed by continuously circulating the foreign substances in the washing water while separating the foreign substances in the washing water, the amount of washing water consumed in backwashing can be greatly reduced.

The backwash pump (43) and the wash-water inflow inlet (50) are connected to the first connection pipe (44). A coupling is provided at the end of the first connection pipe (44), so that it can be engaged with and separated from the washing and drinking inflow pipe (50).

The second connection pipe 45 connected to the circulation pump 47 branches into two branches and is connected to the drain pipe 55 and the wash water discharge pipe 53, respectively. A coupling is provided at the end of the second connection pipe 45 so that it can be coupled to and separated from the drain pipe 55 and the wash water discharge pipe 53.

The actuator 49 is for rotating the rotary shaft 60, and an electric motor can be used. The electric motor is connected to the rotating shaft 60 to rotate the rotating shaft 60. The electric motor is capable of engaging and disengaging with the rotary shaft 60 by an axial joint.

The operation of the above-described backwashing means will be briefly described.

The ground unit 40 is moved to a position where the treatment tank 20 is installed using the vehicle for periodic backwashing. The valve provided in the discharge pipe 29 is closed and then the first connection pipe 44 is connected to the cleaning inflow inlet 50 and the second connection pipe 45 is connected to the drain pipe 55 and the washing water discharge pipe 53 Connect. Then, the valves provided in the drain pipe 55 are closed, and the valves provided in the wash water inflow inlet pipe 50 and the wash water discharge pipe 53 are respectively opened.

When the backwash pump 43 is operated, the wash water stored in the solid-liquid separation tank 41 flows into the lower portion of the filtration space 25 inside the partition wall 23 through the washing and infusing inlet 44. At the same time, the actuator 49 is operated to rotate the rotary shaft 60.

The washing water flowing into the circular filtration space 25 through the washing and infusing inlet 50 rises while rotating along the inner surface of the partition wall 23. As the media materials (1) sitting on the swirling flow of the washing water climb up, they begin to flow. The rotating blades 63 rotating in the same direction as the swirling direction of the washing water promote the flow of the filter media 1, thereby facilitating the desorption of contaminants. The removed contaminants rise together with the washing water and are discharged to the solid-liquid separating tank 41 through the washing water discharge pipe 53 by the circulating pump 47.

The solid foreign matter in the washing water flowing into the solid-liquid separating tank 41 is settled at the bottom of the settling space 42a, and the supernatant is introduced into the discharge space 42b. The supernatant which has flowed into the discharge space 42b flows into the treatment tank 20 again by the backwash pump 43 and is used as wash water.

When the backwashing is completed, the valve of the wash water discharge pipe 53 is closed and the valve of the drain pipe 55 is opened to discharge all the washing water remaining in the treatment tank 20. The washing water remaining in the treatment tank 20 is discharged to the solid-liquid separation tank 41 through the drain pipe 55 by the circulation pump 47.

When the washing water remaining in the treatment tank 20 is discharged to the outside, the first and second connection pipes 44 and 45 are separated and the connection between the electric motor and the rotary shaft is also separated. Then, the valves of the wash water discharge pipe 53 and the drain pipe 55 are closed, and the valve of the discharge pipe 29 is opened.

As described above, the present invention does not need to be connected to the ground portion and the underground portion at all times, and allows the ground portion to be moved to the vehicle, and is used when the backwashing is necessary.

Meanwhile, in the illustrated embodiment, although the downflow filtration through the filter medium layer flows from the upper part to the lower part of the stormwater flowing into the filtration space, the rainwater flowing into the filtration space passes through the filter medium layer An upflow equation can be applied. In this case, the rainwater flows into the partition wall and the inner surface of the treatment tank, and the rainwater flows into the filtration space through the communication hole formed in the lower portion of the partition wall. The discharge pipe is connected to the upper part of the partition wall through the treatment tank.

It is necessary to disintegrate the hardened filter media layer at the initial stage of backwashing when the filter media are piled up with too much contaminants or soil. To this end, the flow promoting unit may further include a collapsing portion.

Referring to FIG. 10, the collapsing portion moves up and down in the filter medium accommodating space during rotation of the rotating shaft 60, thereby collapsing the filter medium layer to float the filter media.

For example, the collapsing portion may include a screw portion 70 formed on the rotary shaft 60, a lift ring 75 screwed to the screw portion 70, a lifting wing 79 coupled to the lift ring 75, And a guide bar 79 for guiding upward and downward movement of the guide bar 79.

The screw portion (70) is formed in a part of the rotating shaft (60). The screw portion 70 is formed by cutting a thread on the outer peripheral surface of the rotating shaft. An upper stopper 71 is provided at an upper portion of the screw portion 70 and a lower stopper 73 is provided at a lower portion of the screw portion 70.

The lift ring 75 is formed with a screw hole on the inner side so as to be screwed to the screw portion 70. The lifting ring 75 is screwed to the screw portion 70 so that the lifting ring 75 can move up and down along the screw portion 70 when the rotating shaft 60 rotates.

A plurality of lifting wings (77) are coupled to the outer surface of the lifting ring (75). In the illustrated example, four lifting blades 77 are positioned at a 90 degree angle apart. A circular insertion hole is formed in the lifting wing (77). The lifting vanes 77 are installed to be positioned at the lower portion of the filter medium layer.

The guide bar 79 is vertically installed so as to be parallel to the rotating shaft 60. The upper end of the guide bar 79 may be fixed to the upper net member and the lower end of the guide bar 79 may be fixed to the lower net member 31.

The guide bar 79 is provided with a number equal to the number of the lifting blades 77. The guide bar 79 is inserted into the insertion hole formed in the lifting vane 77. The guide bar 79 serves to guide the lifting vane 77 up and down.

When the rotary shaft 60 is rotated for backwashing, the lifting ring 75 moves upward, and thus the lifting vane 77 also moves upward. When the lifting vanes 77 located at the lower portion of the media layer rise upward, the media layers that have solidified and are solidified are collapsed to separate the media.

The separated filter media 1 starts to flow by the rising washing water while being swirled and the flow is promoted by the rotating blades 63 so that the contaminants attached to the filter material 1 are effectively desorbed.

On the other hand, in the embodiment of FIG. 10, the actuator for rotating the rotary shaft 60 is operated so as to repeatedly rotate the rotary shaft 60 forward and reverse. The forward rotation exhibiting lifting blades 77 of the rotary shaft 60 are raised and the lifting blades 77 are lowered during the reverse rotation of the rotary shaft 60.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation. Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

1: Filter 3: Body
5: Flow hole 7: Exposed member
20: Treatment tank 23:
27: storm inflow pipe 29: discharge pipe
30: Filtration unit 50: Washing infusion
53: wash water discharge pipe 55: drain pipe
60: rotating shaft 63: rotating blade

Claims (8)

delete A spherical body formed of a synthetic resin and having an empty interior and a plurality of flow holes;
And an exposure member attached to the surface of the body and exposed to the outside, the exposed member being made of an inorganic material selected from the group consisting of loess powder and sand,
A specific gravity of 1.05 to 1.2,
Wherein the body comprises a main body and a sub body accommodated in the main body and formed to be smaller than the main body so as to flow inside the main body. delete delete delete A treatment tank;
An excellent inflow tube installed at an upper portion of the treatment tank for introducing rainwater into the treatment tank;
A filtration unit installed inside the treatment tank to remove a nonpoint source of pollution introduced into the treatment tank;
A discharge tube installed in the treatment tank so that the stormwater can be discharged to the outside through the filtration unit;
And backwash means for backwashing the filtration unit,
Wherein the filtration unit comprises: a lower net member spaced from the bottom of the treatment tank; an upper net member spaced upward from the lower mesh member; and a plurality of filter media installed in the filter medium accommodation space between the lower net member and the upper net member. And a barrier metal layer formed on the barrier metal layer,
The filter material is formed of a synthetic resin and has a spherical body having an empty space and a plurality of flow holes formed therein and an exposing member attached to the surface of the body and exposed to the outside and made of an inorganic material such as ocher powder or sand ,
The filter material has a specific gravity of 1.05 to 1.2,
Wherein the backwash means includes a ground portion movable by a vehicle and a ground portion installed in the treatment tank and connected to the ground portion,
Wherein the supporting portion includes a washing and inflow inlet connected to the lower portion of the treating tank so as to allow the washing water to flow into the treating tank while allowing the washing water to flow into the treating tank, A washing water discharge pipe connected to an upper portion of the treatment tank to discharge wash water passed through the filtration unit and a drain pipe connected to a lower portion of the treatment tank,
Wherein the flow promoting unit includes a rotation shaft installed inside the processing tank so as to penetrate the filtration unit up and down, and a rotation blade coupled to the rotation shaft so as to be located in the filter material accommodation space. [7] The apparatus of claim 6, wherein the flow promoting unit further comprises a collapse portion for vertically moving the filter media when the rotation shaft rotates,
The collapsing portion may include a screw portion formed on the rotary shaft, a lift ring screwed to the screw portion, a lifting blade coupled to the lift ring and positioned below the rotary blade, And a guide bar inserted in the insertion hole formed in the lifting vane and guiding the lifting vane upward and downward. 7. The washing machine according to claim 6, wherein the ground portion comprises: a solid-liquid separator for storing wash water; a backwash pump for pumping wash water from the solid-liquid separator; a first connector for connecting the backwash pump to the wash- A circulation pump connected to the second connection pipe for introducing wash water passed through the treatment tank into the solid-liquid separation tank, a circulation pump connected to the second connection pipe for transferring power to the flow promotion unit, And an actuator.

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