KR102371298B1 - Non-point Pollutants Treatment Facility - Google Patents

Abstract

Disclosed is an automatic backwash nonpoint pollutant reduction facility. The disclosed automatic backwash nonpoint pollutant reduction facility comprises: a pretreatment part (100) for primarily filtering foreign materials included in rainwater introduced through an inflow pipe (112) connected to a rainwater pipeline; an inflow part (200) partitioned from the pretreatment part (100) by a first bulkhead (116) protruding from a bottom surface of the pretreatment part (100) and secondarily filtering foreign materials overflowing over the first bulkhead (116) to be introduced and not filtered by the pretreatment part (100); a filtering part (300) partitioned from the inflow part (200) by a second bulkhead (212) protruding from a ceiling of the inflow part (200) and filtering foreign materials introduced from the lower part of the second bulkhead (212) and not filtered by the inflow part (200); and a treatment water tank (400) partitioned from the filtering part (300) by a third bulkhead (312) protruding from a bottom surface of the filtering part (300) and storing the rainwater filtered by the pretreatment part (100), the inflow part (200) and the filtering part (300) or discharging the same through an outflow pipe (402) formed at one side to the outside. Therefore, foreign materials can be prevented from overflowing into an inflow tank.

Description

Automatic Backwash Non-point Pollution Reduction Facility {Non-point Pollutants Treatment Facility}

The present invention relates to an automatic backwash non-point pollution reduction facility, and more particularly, by providing a primary rectifying plate at the inlet to reduce the flow rate and vortex of the initial rainwater flowing into the pretreatment tank. By blocking turbulence, foreign substances are prevented from flowing directly into the inflow tank, and a filter media separation net is arranged between the second and third filter media layers to prevent mixing of the second and third media to increase the filtering efficiency. At the same time, by dividing the filtration tank into one or more compartments and sequentially backwashing the compartments with minimal power, the installation and maintenance cost of equipment required for backwashing the filtration tank is reduced, while at the bottom of the inflow tank and the filtration tank through the high-pressure washing pipe. It relates to an automatic backwashing non-point pollution reduction facility that can keep the inside of the facility clean and remove the cause of odor by washing foreign substances by spraying high pressure water.

Nonpoint Pollution Source is also called non-specific pollution source, cotton pollution source, mobile pollution source, or other water pollution source. It refers to a place or area that generates nonpoint pollutants.

Nonpoint pollutants are pollutants that are mainly discharged together with surface runoff when it rains. Fertilizers or pesticides applied to farmland, soil erosion, livestock runoff, traffic pollutants, dust and garbage in urban areas, and residues of natural animals and plants. Water, bacteria and viruses, oil and grease, heavy metals and organic matter, contaminants, and air pollutants that have fallen to the ground.

In other words, rainwater discharged with all pollutants is actually the main nonpoint source.

In particular, in urban areas, due to the increase of various paved roads and water and sewage facilities, as the amount of runoff naturally discharged during rain increases, non-point pollution sources increase, resulting in deterioration of water quality.

Therefore, the Ministry of Environment made it mandatory to install non-point pollution reduction facilities to prevent water pollution.

In general, non-point pollution reduction facilities consist of a pretreatment tank, an inflow tank, a filtration tank, and a rainwater tank.

Rainwater containing pollutants is first introduced into the pretreatment tank through the rainwater pipe.

At this time, when rainwater with a high flow rate flows in, foreign substances contained in the rainwater do not settle and overflow into the inflow tank as it is, resulting in clogging of the inflow tank.

Therefore, in order to prevent contaminated rainwater from overflowing into the inflow tank, the inflow velocity of rainwater must be reduced.

Therefore, there is a need for a method that can filter a large amount of rainwater and minimize the maintenance cost.

Meanwhile, in the filtration unit, filter yarns of various particle diameters are used to filter fine foreign substances contained in rainwater using the filter yarns.

The filter yarn is backwashed in order to maintain the filtration efficiency of rainwater through the filter yarn.

However, when filter yarns having different particle diameters are mixed with each other during the backwashing process of the filter yarns, the voids between the filter yarns become irregular, thereby lowering the filtration efficiency.

Conventionally, after backwashing the filter yarn, the rainwater used for backwashing was only drained to the outside.

However, there is a problem in that foreign substances detached from the filter yarn by backwashing are deposited on the floor to obstruct the flow path of rainwater or cause odor inside the facility.

On the other hand, in order to spray the rainwater necessary for backwashing the filtration filter unit to the entire filter unit, a large capacity pump capable of pumping a large amount of rainwater at once is required.

Therefore, it is a problem that not only high power is required to operate the pump, but also a significant cost is incurred in constructing a plumbing facility capable of discharging a large amount of rainwater.

Therefore, for a non-point pollution reduction facility that can reduce the flow rate of rainwater flowing into the pretreatment tank, separate filter yarns of different particle diameters from mixing, economically backwash filter yarns, and remove foreign substances deposited on the bottom of the filter tank development is desperately needed.

Korean Patent Publication No. 10-2017-0048747

The present invention has been proposed to solve the above problems, and a primary rectifying plate is provided at the inlet to reduce the flow rate and vortex of the initial rainwater flowing into the pretreatment tank. The purpose of this is to prevent foreign substances from flowing directly into the inflow tank by blocking the turbulence.

Another object of the present invention is to increase filtering efficiency by preventing mixing of the second and third filter media by disposing a filter media separation network between the second and third media layers.

Another object of the present invention is to reduce the installation and maintenance cost of equipment required for backwashing the filter tank by dividing the filter tank into one or more compartments and sequentially backwashing the compartments with minimal power.

Another object of the present invention is to keep the inside of the facility clean and to remove the cause of odor by spraying high-pressure water on the bottom of the inflow tank and the filtration tank through the high-pressure washing pipe to wash foreign substances.

The present invention provides a pretreatment unit for filtering and filtering foreign substances contained in rainwater flowing in through an inlet pipe connected to a rainwater pipe;

an inlet part partitioned from the pretreatment part by a first partition wall formed protruding from the bottom surface of the pretreatment part, and overflowing and flowing into the upper part of the first partition wall to secondarily filter foreign substances that have not been filtered by the pretreatment part;

a filtering part partitioned from the inlet part by a second partition wall formed to protrude from the ceiling of the inlet part, and flowing into the lower part of the second partition wall to filter out foreign substances that are not filtered in the inlet part;

A treatment water tank partitioned from the filtration unit by a third partition wall formed protruding from the bottom surface of the filtration unit, storing rainwater filtered through the pretreatment unit, the inlet unit, and the filtration unit, or discharging it to the outside through an outlet pipe formed on one side It is characterized in that it contains;

In addition, the pre-processing unit of the present invention,

a pre-treatment tank having a space capable of accommodating rainwater therein, and in which rainwater is introduced through an inlet formed on one side;

a rectifying box formed in a mesh-like wire mesh shape and coupled to the front of the inlet;

a first drain pump disposed under the pretreatment tank to discharge foreign substances deposited on the bottom of the pretreatment tank to the outside;

It is characterized in that it reduces the flow rate of rainwater flowing into the pretreatment tank through the rectification box, and prevents vortex and turbulence generated when rainwater flows in, thereby accelerating the sedimentation of foreign substances.

In addition, the present invention further includes; an overflow prevention bulkhead formed in a plate shape and disposed between the rectification box and the first bulkhead and formed higher than the first bulkhead,

By guiding the flow path of rainwater that has passed through the rectification box by the overflow prevention bulkhead to the lower part of the pretreatment tank, the sedimentation efficiency of foreign substances contained in rainwater is increased, and at the same time, the rainwater that has passed through the rectification box is prevented from overflowing directly into the inlet. characterized in that

In addition, the inlet of the present invention,

an inflow tank having a space capable of accommodating rainwater therein, and into which rainwater flows between the overflow prevention bulkhead and the first bulkhead;

It is formed in a mesh-like wire mesh shape, and is coupled to surround the upper end of the first partition wall to filter out foreign substances and filter the screen box; includes;

It is characterized in that the fine foreign matter that is not filtered in the pre-processing unit is filtered by the screen box.

In addition, the filtration unit of the present invention,

a filtration tank having a space capable of accommodating rainwater therein, and into which rainwater filtered from the inflow tank is introduced;

a filtration filter unit in which foreign substances contained in rainwater introduced into the filtration tank are filtered through the filter media layer;

a high-pressure air pipe installed in the lower part of the filter unit and forming a flow path of high-pressure air supplied from the outside;

a high-pressure water pipe disposed above the filtration tank to form a flow path of high-pressure water;

and a second partition wall formed on one side of the filtration filter part so as to be spaced apart from the bottom of the filtration tank by a predetermined distance so that the inflow tank and the bottom of the filtration tank communicate with each other.

In addition, the present invention further includes; a backwash pump installed in the lower part of the treatment water tank and connected to the high pressure water pipe to pump the rainwater stored in the treatment water tank to backwash the filtration filter unit;

The filtration filter unit is divided into one or more filtration compartments, characterized in that the filtration compartments are sequentially backwashed with the minimum power required for one filtration compartment.

In addition, the filtration filter unit of the present invention,

a first filter media layer disposed at the lowermost end and filled with a first filter thread;

a second filter media layer stacked on top of the first filter media layer and filled with second filter yarns smaller than the first filter yarns;

a third filter media layer stacked on top of the second filter media layer and filled with third filter threads smaller than the second filter threads;

It is characterized in that fine foreign substances are filtered by the third filter media layer by forming smaller pores formed between each filter media layer toward the upper part.

In addition, the present invention further includes; a filter media separation network that is disposed between the second filter media layer and the third filter media layer, and is formed of a mesh network having a size smaller than that of the second filter yarn,

The filter media separation network is characterized in that even when high-pressure air is injected from the high-pressure air pipe, the second filter yarn is blocked from moving to the third filter media layer, thereby maintaining the filtration efficiency of the filtering filter unit.

The present invention also includes a second drain pump disposed at the edge of the bottom surface of the inflow tank to discharge rainwater and accumulated foreign substances remaining on the bottom of the inflow tank and the filtration tank to the outside;

a first high-pressure washing pipe disposed on one side of the lower side of the filtration tank in the width direction of the filtration tank and formed so that high-pressure water is sprayed in the longitudinal direction of the filtration tank toward the second drain pump to wash the bottom of the filtration tank;

A second high-pressure washing pipe disposed in the longitudinal direction of the filtration tank on one side of the lower side of the inflow tank and formed so that high-pressure water is sprayed in the width direction of the filtration tank toward the second drain pump to wash the bottom of the inflow tank; further comprising,

The first high-pressure washing pipe and the second high-pressure washing pipe are arranged to form a L-shape, so that rainwater and accumulated foreign substances remaining at the bottom of the inflow tank and the filtration tank are guided to the second drain pump.

The non-point pollution reduction facility according to the present invention is provided with a primary rectifying plate at the inlet to reduce the flow rate and vortex of the initial rainwater flowing into the pretreatment tank. By blocking the turbulence, it has the effect of preventing foreign substances from flowing directly into the inflow tank.

In addition, the present invention has an effect of increasing the filtering efficiency by preventing mixing of the second and third filter media by disposing a filter media separation network between the second and third media layers.

In addition, the present invention has the effect of reducing the installation and maintenance cost of equipment necessary for backwashing the filter tank by dividing the filter tank into one or more compartments and sequentially backwashing the compartments with minimal power.

In addition, the present invention has the effect of keeping the inside of the facility clean and removing the cause of odor by spraying high-pressure water to the bottom of the inflow tank and the filtration tank through the high-pressure washing pipe to wash foreign substances.

In addition to the above-described effects, the specific effects of the present invention will be described together while describing specific details for carrying out the invention below.

1 is a front view of a non-point pollution reduction facility according to the present invention.
2 is a plan view of a non-point pollution reduction facility according to the present invention.
Figure 3 is a cross-sectional view AA of the non-point pollution reduction facility according to the present invention.
4 is a BB cross-sectional view of a non-point pollution reduction facility according to the present invention.
5 is a CC sectional view of a non-point pollution reduction facility according to the present invention.
6 is a DD cross-sectional view of a non-point pollution reduction facility according to the present invention.
7 is an EE cross-sectional view of a non-point pollution reduction facility according to the present invention.
8 is a FF cross-sectional view of a non-point pollution reduction facility according to the present invention.
9 is a sectional view II of the non-point pollution reduction facility according to the present invention.
10 is a view showing a backwashing process of the filtration filter unit according to the present invention.

Hereinafter, various embodiments of the present document will be described with reference to the accompanying drawings. However, this is not intended to limit the technology described in this document to specific embodiments, and it should be understood that the present document includes various modifications, equivalents, and/or alternatives of the embodiments of the present document. In connection with the description of the drawings, like reference numerals may be used for like components.

In addition, expressions such as "first," "second," used in this document may modify various elements regardless of order and/or importance, and in order to distinguish one element from another element, It is used only and does not limit the corresponding components. For example, 'first part' and 'second part' may represent different parts regardless of order or importance. For example, without departing from the scope of the rights described in this document, a first component may be referred to as a second component, and similarly, the second component may also be renamed as a first component.

In addition, terms used in this document are used only to describe specific embodiments, and may not be intended to limit the scope of other embodiments. The singular expression may include the plural expression unless the context clearly dictates otherwise. Terms used herein, including technical or scientific terms, may have the same meanings as commonly understood by one of ordinary skill in the art described in this document. Among terms used in this document, terms defined in a general dictionary may be interpreted with the same or similar meaning as the meaning in the context of the related art, and unless explicitly defined in this document, ideal or excessively formal meanings is not interpreted as In some cases, even terms defined in this document cannot be construed to exclude embodiments of the present document.

1 is a front view of a non-point pollution reduction facility according to the present invention, and FIG. 2 is a plan view of a non-point pollution reduction facility according to the present invention.

The non-point pollution reduction facility according to the present invention is composed of a pretreatment unit 100 , an inlet unit 200 , a filtration unit 300 , and a treatment water tank 400 .

Rainwater flows into the pretreatment tank 110 through the inlet pipe 112 connected to the rainwater pipe.

The pre-processing unit 100 filters and filters foreign substances contained in rainwater.

The pretreatment unit 100 has a pretreatment tank 110 , a rectification box 120 , and a first drain pump 140 as main components.

The first drain pump 140 is disposed below the pretreatment tank 110 .

The first drain pump 140 discharges foreign substances deposited on the bottom of the pretreatment tank 110 to the outside.

The pretreatment tank 110 has a space that can accommodate rainwater therein.

Rainwater flows into the pretreatment tank 110 through an inlet 114 formed on one side of the pretreatment tank 110 .

The inlet 200 is partitioned from the pretreatment unit 100 by a first partition wall 116 formed to protrude from the bottom of the pretreatment tank 110 .

A space capable of accommodating rainwater is formed therein, which is referred to as an inflow tank 210 .

Rainwater that has passed through the pre-treatment unit 100 overflows to the upper portion of the first partition wall 116 and flows into the inlet unit 200 .

The inlet 200 secondary filters foreign substances that have not been filtered in the pre-processing unit 100 .

The filter unit 300 is partitioned from the inlet unit 200 by a second partition wall 212 formed to protrude from the ceiling of the inlet unit 200 .

Rainwater passing through the inlet 200 flows into the lower portion of the second partition wall 212 .

The filtration unit 300 filters fine foreign substances that are not filtered in the inlet unit 200 .

The treatment water tank 400 is partitioned from the filter unit 300 by a third partition wall 312 formed to protrude from the bottom surface of the filter unit 300 .

Rainwater filtered through the pretreatment unit 100 , the inlet unit 200 , and the filtration unit 300 is stored in the treatment water tank 400 , or rainwater is collected through the outlet pipe 402 formed on one side of the treatment water tank 400 . discharged outside

Rainwater, which is a non-point pollution source, is filtered several times through the pretreatment unit 100 , the inlet unit 200 , the filter unit 300 , and the treatment water tank 400 , and then the pollutant source is removed and discharged to the outside.

That is, water pollution can be prevented through the non-point pollution reduction facility according to the present invention.

On the other hand, rainwater received into the pretreatment tank 110 contains foreign substances and oils having a small or large specific gravity.

Contaminants such as oil with a small specific gravity float to the surface, and pollutants such as stones and sand with a large specific gravity sink to the lower part of the pretreatment tank 110 .

However, when rainwater with a high flow rate flows in, foreign substances contained in the rainwater do not settle and overflow into the inflow tank 210 as it is, resulting in clogging of the inflow tank 210 .

In addition, when rainwater with a high flow velocity is introduced, vortex and turbulence are generated, which is a factor that prevents the sedimentation of foreign substances contained in rainwater.

When the foreign material does not settle to the bottom of the pretreatment tank 110 due to the vortex and turbulence, the foreign material overflows into the inflow tank 210 together with rainwater.

Therefore, in order to prevent rainwater from overflowing into the inflow tank 210 as it is, it is necessary to decrease the inflow velocity of rainwater.

Accordingly, in the present invention, the conventional problem is solved through the rectification box 120 provided on one side of the pretreatment tank 110 .

3 is a cross-sectional view A-A of the non-point pollution reduction facility according to the present invention.

As shown in FIG. 3 , the rectifying box 120 is formed in a mesh-like wire mesh shape and is coupled to the front of the inlet 114 .

As rainwater flowing into the pretreatment tank 110 from the inlet 114 passes through the rectification box 120 , the flow rate of rainwater is reduced.

In addition, it provides an environment in which foreign substances are well deposited on the bottom of the pretreatment tank 110 by blocking the vortex and turbulence that occur during the inflow of rainwater.

That is, as rainwater passes through the rectifying box 120 , the flow rate is reduced, and vortex and turbulence are prevented, thereby accelerating the sedimentation of foreign substances.

In addition, an overflow prevention bulkhead 130 is provided between the rectification box 120 and the first bulkhead 116 to prevent overflow of rainwater flowing into the inlet 200 .

4 is a B-B cross-sectional view of a non-point pollution reduction facility according to the present invention.

As shown in FIG. 4 , the overflow prevention bulkhead 130 is disposed parallel to the first bulkhead 116 and spaced apart from each other by a predetermined distance, and is formed to be higher than the first bulkhead 116 .

If there is no overflow prevention bulkhead 130 , there is a risk that rainwater flowing in at a high flow rate is not filtered by the pre-treatment unit 100 and flows directly into the inflow tank 210 .

The flow rate of rainwater decreases while passing through the rectification box 120 primarily, but when rainwater that has not been partially decelerated splashes and flows into the inflow tank 210 , the overflow prevention bulkhead 130 blocks it.

It does not flow into the inflow tank 210 as it is, but induces rainwater to flow between the overflow prevention bulkhead 130 and the first bulkhead 116 from the lower portion of the pretreatment tank 110 .

That is, the flow velocity of rainwater passing through the rectification box 120 and flowing between the overflow prevention bulkhead 130 and the first bulkhead 116 has the effect of significantly reducing.

By guiding the flow path of rainwater passing through the rectification box 120 to the lower part of the pretreatment tank 110 by the overflow prevention bulkhead 130, the sedimentation efficiency of foreign substances contained in the rainwater is improved.

In addition, there is an effect of preventing blockage of the inflow tank 210 by preventing rainwater passing through the rectification box 120 from directly overflowing into the inlet 200 .

5 is a C-C cross-sectional view of a non-point pollution reduction facility according to the present invention.

5, the inlet 200 is provided with a screen box 220 formed in a mesh-type wire mesh shape.

The screen box 220 is coupled to surround the upper end of the first partition wall 116 to filter out foreign substances.

Foreign substances contained in rainwater are primarily filtered through the rectifying box 120 and secondarily filtered through the screen box 220 .

That is, fine foreign substances that are not filtered by the pre-processing unit 100 through the rectifying box 120 are filtered by the screen box 220 .

6 is a D-D cross-sectional view of a non-point pollution reduction facility according to the present invention, and FIG. 7 is a E-E cross-sectional view of a non-point pollution reduction facility according to the present invention.

Rainwater filtered by the pretreatment unit 100 and the inlet unit 200 flows into the filter unit 300 .

The filtration unit 300 includes a filtration tank 310 , a filtration filter unit 350 , a high-pressure air pipe 320 , a high-pressure water pipe 330 , and a backwash pump 430 .

The filtering tank 310 is a water tank in which rainwater filtered through the inlet 200 is introduced and accommodated.

A second partition wall 212 is formed on one side of the filtering filter unit 350 .

The second partition wall 212 is spaced apart from the bottom of the filtration tank 310 by a predetermined distance so that the inflow tank 210 and the bottom of the filtration tank 310 communicate with each other.

As shown in FIG. 1 , rainwater passing through the inlet 200 flows into the lower portion of the second partition wall 212 .

The filtration filter unit 350 filters foreign substances contained in the rainwater introduced into the filtration tank 310 through the filter media layer.

The filter yarn forming the filter media layer is sand with a filtering function.

The smaller and finer the particle size of the filter yarn, the finer the foreign matter is filtered out.

The filter media layer consists of such filter yarns, and the filter media layers are classified according to the particle size of the filter yarns.

The filtering filter unit 350 according to the present invention includes a first filter medium layer 352 , a second filter medium layer 354 , and a third filter medium layer 356 .

However, in the present invention, it is composed of three filter media layers, but the present invention is not limited thereto and can be variously changed according to design conditions.

The first filter media layer 352 is filled with the first filter yarn, and is disposed at the lowermost end of the filtering filter unit 350 .

The second filter media layer 354 is filled with second filter yarns and is stacked on top of the first filter media layer 352 .

The second filter yarn is formed of smaller filter yarns than the first filter yarn.

The third filter media layer 356 is filled with third filter yarn and is stacked on top of the second filter media layer 354 .

The third filter yarn is formed of a smaller filter yarn than the second filter yarn.

That is, as shown in FIG. 7 , the filter media layer is formed with fine filter yarns toward the top.

In other words, from the first filter media layer 352 to the third filter media layer 356 , the pores formed between the respective media layers are formed smaller, so that the third media layer 356 filters out fine foreign substances.

8 is a cross-sectional view F-F of the non-point pollution reduction facility according to the present invention, and FIG. 9 is a cross-sectional view I-I of the non-point pollution reduction facility according to the present invention.

It will be described with reference to FIGS. 8 to 9 .

The high-pressure air pipe 320 , the high-pressure water pipe 330 , and the backwash pump 430 are components for backwashing the filtration filter unit 350 .

The high-pressure air pipe 320 is installed under the filtration filter unit 350 .

The high-pressure air pipe 320 forms a flow path of the high-pressure air supplied from the outside.

The high-pressure water pipe 330 is disposed above the filtration tank 310 to form a flow path of the high-pressure water.

The backwash pump 430 is installed under the treatment water tank 400 .

The backwash pump 430 is connected to the high-pressure water pipe 330 to pump the rainwater stored in the treatment water tank 400 to the filter tank 310 to backwash the filtering filter unit 350 .

The reason for backwashing the filtration filter unit 350 that filters rainwater is to keep the filtration efficiency above a certain standard by desorbing foreign substances caught between the filter yarns.

If the filtration is not performed properly due to the foreign matter caught between the filter yarns, the filtration efficiency is lowered and the foreign material cannot be filtered and a problem occurs that flows into the treatment water tank 400 .

Therefore, the filter yarn is backwashed through the high-pressure air pipe 320 and the high-pressure water pipe 330 in order to detach the foreign substances caught in the filter yarn from the filter yarn and maintain the filtration efficiency.

The backwashing process will be described.

Rainwater primarily filtered through the pretreatment unit 100 flows into the inflow tank 210 and the filtration tank 310 to fill the inflow tank 210 and the filtration tank 310 .

It is drained with the second drain pump 230 so that the water level of rainwater is located at the upper end of the third filter media layer 356 .

Then, the high-pressure air is sprayed from the lower part to the upper part through the high-pressure air pipe 320 to generate bubbles to desorb the foreign substances caught between each filter thread.

After desorbing foreign substances by spraying high-pressure air for a predetermined time, the rainwater filled in the inflow tank 210 and the filtration tank 310 is drained to the lower end of the filtration filter unit 350 with the second drain pump 230 .

At this time, the desorbed foreign material also moves to the lower end of the filtering filter unit 350 .

Then, the rainwater stored in the treatment water tank 400 is pumped by the backwash pump 430 , and the high pressure water is sprayed from the upper part of the filtration filter unit 350 through the high pressure water pipe 330 .

The high-pressure water penetrates into the voids between the filter yarns and desorbs foreign substances caught between the filter yarns.

The high-pressure water is filled up to the upper end of the third filter medium layer 356 of the filtration filter unit 350 through the high-pressure water pipe 330 .

Perform this process more than once to remove the foreign substances caught between the filter yarns.

Then, rainwater and desorbed foreign substances filled in the inflow tank 210 and the filtration tank 310 are discharged to the outside by the second drain pump 230 .

In the process in which the high-pressure air is sprayed from the lower part of the filter part 350 to the upper part, the filter yarn is mixed by the high-pressure air.

When filter yarns with different particle diameters are mixed with each other, the voids between the filter yarns become irregular, resulting in a problem of lowering the filtration efficiency.

Accordingly, the present invention solves the conventional problems by providing a filter media separation network 360 between the second filter media layer 354 and the third media layer 356 .

The filter media separation network 360 is formed of a mesh network having a size smaller than that of the second filter yarn.

The filter media separation network 360 according to the present invention is preferably formed of plastic resin (P.E).

The filter media separation network 360 is disposed between the second filter media layer 354 and the third filter media layer 356 and serves to separate the second filter yarn and the third filter yarn so that they do not mix.

The third filter yarn has a very small particle size, and a predetermined amount of the third filter yarn moves to the second filter medium layer 354 between the filter media separation networks 360 , but is seated on the upper end of the second filter medium layer 354 and the second filter medium After filling the top void of the layer 354, it no longer moves into the second media layer 354.

In order to maintain the filtration efficiency above the preset standard, it is necessary to block the movement of the second filter yarn to the third filter medium layer 356 formed of the finest filter yarn.

Therefore, the filter media separation network 360 according to the present invention blocks the second filter yarn from moving to the third filter media layer 356 even when high-pressure air is injected from the high-pressure air pipe 320 , thereby filtering the filtration filter unit 350 . It has the advantage of maintaining efficiency.

Meanwhile, in the prior art, after backwashing the filter yarn, the rainwater used for backwashing was only drained to the outside.

However, there was a problem in that foreign substances detached from the filter yarn by backwashing were deposited on the floor to obstruct the flow path of rainwater or to cause odors inside the facility.

Accordingly, the present invention solves the problems of the prior art by providing a high-pressure washing pipe for removing foreign substances deposited on the bottom of the inflow tank 210 and the filtration tank 310 .

In the present invention, a second drain pump 230, a first high-pressure washing pipe 410, and a second high-pressure washing pipe 420 are provided to remove foreign substances deposited on the bottom of the inflow tank 210 and the filtration tank 310. .

The second drain pump 230 is disposed at a corner of the bottom surface of the inflow tank 210 .

The second drain pump 230 discharges rainwater and accumulated foreign substances remaining at the bottom of the inflow tank 210 and the filtration tank 310 to the outside.

The first high-pressure washing pipe 410 is disposed in the width direction of the filtration tub 310 on one lower side of the filtration tub 310 .

The first high-pressure washing pipe 410 is formed so that high-pressure water is sprayed in the longitudinal direction of the filtration tub 310 toward the second drain pump 230 to wash the bottom of the filtration tub 310 .

The second high-pressure washing pipe 420 is disposed in the longitudinal direction of the filtration tank 310 on one lower side of the inflow tank 210 .

The second high-pressure washing pipe 420 is formed so that high-pressure water is sprayed in the width direction of the filtration tank 310 toward the second drain pump 230 to wash the bottom of the inflow tank 210 .

9, the first high-pressure washing pipe 410 and the second high-pressure washing pipe 420 forms a L-shape.

The high-pressure water sprayed through the first high-pressure washing pipe 410 washes foreign substances deposited on the bottom of the filtration tank 310 , and the high-pressure water sprayed through the second high-pressure washing pipe 420 is at the bottom of the inflow tank 210 . Clean the accumulated foreign matter.

The first high-pressure washing pipe 410 and the second high-pressure washing pipe 420 are arranged to form a L-shape, and the rainwater and accumulated foreign substances are transferred to the second drain pump 230 disposed at the edge of the bottom surface of the inflow tank 210 . induce

That is, the first high-pressure washing pipe 410 and the second high-pressure washing pipe 420 according to the present invention are arranged to form a L-shape, so that rainwater and accumulated foreign substances remaining at the bottom of the inflow tank 210 and the filtration tank 310 are is introduced to the second drain pump 230 to be discharged to the outside.

In addition, the bottom of the inlet tank 210 where the second drain pump 230 is installed is formed to be depressed lower than around the second drain pump 230 to improve the pumping efficiency of rainwater collected by the second drain pump 230 . make it

Therefore, the present invention sprays high-pressure water to the bottom of the inflow tank 210 and the filtration tank 310 through a high-pressure washing pipe to wash foreign substances deposited on the bottom, thereby keeping the inside of the reduction facility clean and removing the cause of odor.

On the other hand, in order to spray the entire filter unit 350 at once for backwashing the filter unit 350, a large capacity pump capable of pumping a large amount of rainwater is required.

Therefore, there is a problem in that high-power facilities are required to operate a high-capacity pump, as well as a significant cost in constructing a plumbing facility capable of discharging a large amount of rainwater.

Since the non-point pollution reduction facility only needs to complete the backwashing of the filtration filter unit 350 within a preset time, a high-capacity pump is not necessarily required.

Accordingly, in the present invention, by dividing the filtration filter unit 350 into one or more filtration compartments, the filtration compartments are sequentially backwashed with the minimum power required for one filtration compartment.

10 is a view showing a backwashing process of the filtering filter unit 350 according to the present invention.

As shown in FIG. 10 , rainwater stored in the treatment water tank 400 is sequentially supplied to each filtration compartment by the backwash pump 430 .

The high-pressure water pipe 330 is installed so as to branch from the pipe coupled to the backwash pump 430 , and the high-pressure water is sequentially sprayed from the upper part of each filtration compartment.

That is, the present invention has the advantage of reducing the installation and maintenance cost of equipment necessary for backwashing the filtration filter unit 350 by backwashing the filtration filter unit 350 using the backwash pump 430 of the minimum capacity. .

The present invention relates to a non-point pollution reduction facility, and more particularly, by providing a primary rectifying plate at the inlet to reduce the flow rate and vortex of the initial rainwater flowing into the pretreatment tank. By blocking turbulence, foreign substances are prevented from flowing directly into the inflow tank, and a filter media separation net is arranged between the second and third filter media layers to prevent mixing of the second and third media to increase the filtering efficiency. At the same time, by dividing the filtration tank into one or more compartments and sequentially backwashing the compartments with minimal power, the installation and maintenance cost of equipment required for backwashing the filtration tank is reduced, while at the bottom of the inflow tank and filtration tank through the high-pressure washing pipe. It relates to a non-point pollution reduction facility that can clean the inside of the facility and remove the cause of odor by spraying high-pressure water to wash foreign substances.

In the above, preferred embodiments of the present invention have been illustrated and described, but the present invention is not limited to the specific embodiments described above, and it is common in the technical field to which the present invention pertains without departing from the gist of the present invention as claimed in the claims. Various modifications may be made by those having the knowledge of, of course, and these modified embodiments should not be individually understood from the technical spirit or perspective of the present invention.

100: preprocessor
110: pretreatment tank
112: inlet pipe
114: inlet
116: first bulkhead
120: rectification box
130: overflow prevention bulkhead
140: first drain pump
200: inlet
210: inflow tank
212: second bulkhead
220: screen box
230: second drain pump
300: filter unit
310: filtration tank
312: third bulkhead
320: high pressure air pipe
330: high pressure water pipe
350: filtration filter unit
352: first media layer
354: second media layer
356: 3rd media layer
360: filter media separation network
400: treatment tank
402: outlet pipe
410: first high-pressure washing pipe
420: second high-pressure washing pipe
430: backwash pump

Claims (9)

a pre-processing unit 100 that primarily filters and filters foreign substances contained in rainwater flowing in through the inlet pipe 112 connected to the rainwater pipe;
The pre-processing unit 100 is separated from the pre-processing unit 100 by a first partition wall 116 formed to protrude from the bottom surface of the pre-processing unit 100, and overflows into the upper portion of the first partition wall 116 and flows into the pre-treatment unit 100 an inlet 200 for secondarily filtering foreign substances that have not been filtered in;
It is partitioned from the inlet part 200 by a second partition wall 212 formed to protrude from the ceiling of the inlet part 200, but flows into the lower part of the second partition wall 212 and is not filtered in the inlet part 200 Filtering unit 300 for filtering the unsatisfactory foreign substances;
It is partitioned from the filter unit 300 by a third partition wall 312 formed to protrude from the bottom surface of the filter unit 300 , and is passed through the pretreatment unit 100 , the inlet unit 200 and the filter unit 300 . A treatment water tank 400 for storing filtered rainwater or discharging to the outside through an outlet pipe 402 formed on one side; includes;
An inflow tank 210 is formed in the inlet part 200 by the first partition wall 116 and the second partition wall 212,
A filtering tank 310 is formed in the filtering unit 300 by the second partition wall 212 and the third partition wall 312,
a second drain pump 230 disposed at the edge of the bottom surface of the inflow tub 210 and discharging rainwater and accumulated foreign substances remaining on the bottom of the inflow tub 210 and the filtration tub 310 to the outside;
The bottom of the filter tank 310 is disposed on one side of the lower side of the filtering tank 310 in the width direction of the filtering tank 310 and is formed so that high-pressure water is sprayed in the longitudinal direction of the filtering tank 310 toward the second drain pump 230 . a first high-pressure washing pipe 410 for washing;
The inlet tank 210 is disposed in the longitudinal direction of the filtration tank 310 on one lower side of the inflow tank 210 and is formed so that high-pressure water is sprayed in the width direction of the filtering tank 310 toward the second drain pump 230 . It further includes; a second high-pressure washing pipe 420 for washing the bottom of the
The first high-pressure washing pipe 410 and the second high-pressure washing pipe 420 are arranged to form a L-shape, so that rainwater and accumulated foreign substances remaining at the bottom of the inflow tank 210 and the filtration tank 310 are removed. 2 Non-point pollution reduction facility, characterized in that it is guided to the drain pump 230
According to claim 1,
The pre-processing unit 100,
a pre-treatment tank 110 having a space that can accommodate rainwater therein, and into which rainwater is introduced through an inlet 114 formed on one side;
Rectification box 120 formed in a mesh-like wire mesh shape and coupled to the front of the inlet 114;
and a first drain pump 140 disposed below the pretreatment tank 110 to discharge foreign substances deposited on the bottom of the pretreatment tank 110 to the outside;
Non-point pollution reduction facility, characterized in that it reduces the flow rate of rainwater flowing into the pretreatment tank 110 through the rectification box 120 and accelerates the sedimentation of foreign substances by blocking the vortex and turbulence that occur when rainwater flows in.
3. The method of claim 2,
It is formed in a plate shape and is disposed between the rectification box 120 and the first bulkhead 116, and the overflow prevention bulkhead 130 is formed higher than the first bulkhead 116; further comprising,
By guiding the flow path of the rainwater that has passed through the rectification box 120 to the lower portion of the pretreatment tank 110 by the overflow prevention bulkhead 130, the sedimentation efficiency of foreign substances contained in the rainwater is increased, and the rectification box 120. Non-point pollution reduction facility, characterized in that it prevents rainwater passing through the overflow directly into the inlet 200
4. The method of claim 3,
The inlet 200 is,
It is formed in a mesh-like wire mesh shape, and is coupled to surround the upper end of the first partition wall 116 to filter out foreign substances and filter the screen box 220; includes;
The inflow tank 210 has a space that can accommodate rainwater therein, and rainwater is introduced between the overflow prevention bulkhead 130 and the first bulkhead 116,
Non-point pollution reduction facility, characterized in that the fine foreign matter that is not filtered by the pre-processing unit 100 is filtered by the screen box 220
5. The method of claim 4,
The filtering unit 300,
a filtration filter unit 350 through which foreign substances contained in rainwater introduced into the filtration tank 310 are filtered through the filter media layer;
a high-pressure air pipe 320 installed at the lower portion of the filtering filter unit 350 and forming a flow path of high-pressure air supplied from the outside;
a high-pressure water pipe 330 disposed on the filtration tank 310 to form a flow path of high-pressure water;
A second partition wall 212 formed on one side of the filtering filter unit 350 so that the inflow tank 210 and the bottom of the filter tank 310 communicate with each other by a predetermined distance from the bottom of the filtering tank 310;
The filtration tank 310 is a non-point pollution reduction facility, characterized in that a space that can accommodate rainwater is formed therein, and the rainwater filtered in the inflow tank 210 is introduced.
6. The method of claim 5,
A backwash pump ( 430); further comprising,
The filtration filter unit 350 is partitioned into one or more filtration compartments, and a non-point pollution reduction facility, characterized in that the filtration compartments are sequentially backwashed with the minimum power required for one filtration compartment.
6. The method of claim 5,
The filtering filter unit 350,
a first filter media layer 352 disposed at the lowermost end and filled with first filter yarns;
a second filter medium layer stacked on the first filter medium layer 352 and filled with second filter yarns smaller than the first filter yarns;
a third filter media layer 356 stacked on top of the second filter media layer 354 and filled with third filter threads smaller than the second filter thread;
Non-point pollution reduction facility, characterized in that fine foreign substances are filtered by the third filter media layer 356 as the pores formed between each filter media layer become smaller as they go upward.
8. The method of claim 7,
It is disposed between the second filter media layer 354 and the third filter media layer 356, and further includes a filter media separation network 360 formed of a mesh network having a size smaller than that of the second filter yarn;
The filter media separation network 360 maintains the filtration efficiency of the filtering filter unit 350 by blocking the second filter yarn from moving to the third filter medium layer 356 even when the high-pressure air is injected from the high-pressure air pipe 320 . Non-point pollution reduction facility, characterized in that
delete

Images