KR101326227B1 - A rainwater filtering system - Google Patents

Abstract

The present invention relates to a rainwater filtering system which is capable of removing components increasing BOD, COD, and floating materials in rainwater using a rainwater filtering tank with a mesh form multilayered separation layer and multiple filtering balls located inside the multilayered separation layer for the physical and chemical filtration of rainwater, and provides rainwater as agricultural water or water for bathrooms. [Reference numerals] (20') Disaster prevention room computer monitoring system;(AA) Engineering project;(BB) Initial rain drop processing sensor;(CC) Inflow automatic vale OPEN after H:ON initial rain drop processing;(DD) Rain water storage tank water level measuring information and RS422 4P communication line;(EE) Digital sound wave level measuring device (install inside rain water storage tank processing facility MCC PANEL);(FF) Internet connection;(GG) Engineering rain water manhole connection;(HH) Inflow automatic vale (A) (for rain water inlet and preventing backward flowing);(II) Automatic pollutant processing device (AUTO);(JJ) Emergency time connection;(KK,NN) Meter;(LL) Facility work;(MM) Utility water supply (supply landscaping water);(OO) P-104 A/B rain water application pump;(PP) AV-102 filter auto valve (B);(QQ) Rain water inflow level;(RR) P-103 A/B/C/D rain water drainage pump;(SS) P-101 A/B filter pump;(T-1) First rain water storage tank;(T-2) Second rain water storage tank;(TT) P-102 A/B backwash pump

Description

A rainwater filtering system

The present invention relates to a rainwater filtration system, and more specifically, in the rainwater storage tank where rainwater installed in a building is collected, a plurality of rainwater introduced into the rainwater filtration tank by filtering through a mechanical catching network is installed in the rainwater filtration tank. The present invention relates to a rainwater filtration system capable of removing suspended solids, BOD, and COD components in rainwater while being passed through the filter ball so that rainwater can be recycled into landscape or toilet water.

At present, the water shortage is occurring all over the world, and Korea is expected to enter this phase in the near future. From now on, in order to solve the water shortage, efficient water management, securing and utilization should be taken. In order to solve the water shortage phenomenon, it is the best way to efficiently use the rain water naturally falling, so it has various possibilities of research and development.

However, such rainwater is drained together with various pollutants in the air or fallen leaves or garbage deposited on the surface of the water, and soaks into rivers, so that the rainwater can be installed inexpensively and quickly and in large quantities. Rainwater purification facilities are required.

Generally, such rainwater is referred to as nonpoint pollution source, which is different from point pollution sources where pollutants are generated from specific pollutants such as domestic sewage and industrial wastewater. As sources of contamination with surface runoff, nonpoint pollutants emitted from these nonpoint sources contain various pollutants, such as dust and rubbish in urban areas or air pollutants that have fallen to the surface, and are also known as organic pollutants (POPs). It is recognized that the content of is extremely high.

The general rainwater treatment facility for treating such rainwater has a configuration to filter pollutants contained in the rainwater by simply installing a filter cartridge in the drain pipe, and the general rainwater treatment facility is settled by using a general filter medium such as sand in the filtration tank. And it is carried out by the filtration method, the filter cartridge and the filtration facility through the settling and filtration could filter only visible matter such as fallen leaves and dust, it was not able to filter the air pollutants contained in the rain.

When the treatment is performed using a general filter medium such as sand as described above, in order to treat the target rainwater, the filter line velocity (LV) through which the incoming rainwater passes through the filter medium is slow. In the case of treatment using general filter media such as sand, not only the treatment efficiency is lowered due to the porosity between the filter media, but also the backwashing efficiency is lowered due to the low washing efficiency of the existing filter media. In addition to the increase of the overall treatment cost, it is difficult to maintain the filter medium replacement cycle, and it is impossible to recycle the filter medium has had various problems such as waste of resources.

Further, Japanese Laid-Open Patent Publication No. 2004-20571 discloses a technique related to a spherical shaped fiber bundle media, but in the above invention, it is not only suitable to manufacture a large amount of fiber bundles, but also the fiber bundle itself is the maximum performance as the media. There is a problem that can not be expressed, and the fiber bundle can be injected and used inside the filtration tank constituted in a conventional filtration device, the filter material is required in the filtration tank by forming a polyester fiber yarn in a circular state If the amount of water injected into the filter material, the cilia are tightly coupled to each other due to the structure of the filter medium, and a large number of blanks are formed. When the inlet water is injected, the shape of the filter medium is deformed according to the pressure of the injected water, and the space is reduced. When the pressure of a certain value is no more deformation of the filter medium does not occur From the injection pressure above the pressure, the general technique that the filtration amount can be adjusted even in the filtration device having a constant size filtration tank by changing the filtration amount and filtration rate according to the inlet water injection pressure, but the characteristics of the rainwater and filtration tank It has been pointed out that the filtration process cannot proceed smoothly because the techniques for determining the control level of the capacity of the filtration pressure have not been proposed.

Korea Patent 10-0854314, Korea Patent 10-1177477

It is an object of the present invention, the rainwater stored in the rainwater while the rainwater flows through the plurality of filter balls installed in the rainwater filtration tank is first filtered through a mechanical catching network in the rainwater storage tank collected rainwater installed in the building. It is to provide a rainwater filtration system that enables the removal of substances and components that increase BOD and COD so that rainwater can be recycled into landscape or toilet water.

This object of the present invention, the primary rainwater storage tank in which the rainwater of the building flows in and stored, the rainwater is filtered through the sewage sorter to filter the fallen leaves or dust while the rainwater stored in the primary rainwater storage tank is secondary Rainwater is introduced through the rainwater storage tank and the filtration valve of the secondary rainwater storage tank, and a multi-stage separation layer in a mesh state is installed therein, and a plurality of filter balls are disposed in the multistage separation layer to physically and chemically filter the rainwater. Rainwater filtration tank to be carried out, and a third rainwater storage tank for storing the filtered rainwater passing through the rainwater filtration tank, the plurality of filter balls installed in the rainwater filtration tank, the bundle of fine polyester fibers of 5 ~ 50 denier After elasticity is given to the polyester fiber bundle through the stress and tension release process, the fixing ring made of aluminum is used. Tied at intervals of 3cm ± 1.5 cm and cut between each fixing ring, and then preheated for 3 to 5 minutes in the temperature range between 15 ℃ and 150 ℃, and then passed through the rocking panel at room temperature. The bundle of fibers is shrunk to achieve a rainwater filtration system according to the present invention produced through a manufacturing method.

In the rainwater filtration system according to the present invention, a rainwater filtration tank and rainwater filtration in which a multistage separation layer in a mesh state is installed therein and a plurality of filter balls are disposed in the multistage separation layer to perform physical and chemical filtration of rainwater introduced. By the number of filter balls installed in the tank, it is possible to remove the suspended substances contained in the rainwater and the components that increase the BOD and COD has an excellent effect that it is possible to recycle rainwater to landscape water or toilet water.

1 is a process chart of the rainwater filtration system according to the present invention
Figure 2 is a manufacturing process of the filter ball used in the rainwater filtration system according to the present invention
Figure 3 is a schematic view of the filter ball used in the rainwater filtration system according to the present invention
Figure 4 is a photograph of the filter ball used in the rainwater filtration system according to the present invention
5 is a longitudinal sectional view of the rainwater filtration tank of the rainwater filtration system according to the present invention.
6 is an operation cross-sectional view of the rainwater filtration tank used in the rainwater filtration system according to the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In general, the nomenclature used herein and the experimental methods described below are well known and commonly used in the art.

Rainwater filtration system (A) according to the present invention, as shown in Figure 1, the rainwater storage tank (1) in which the rainwater (R1) introduced from the building (B) is introduced and stored, and the primary rainwater storage tank Second rainwater storage tank (2) is stored in the rainwater (R1) stored in (1) and the filtered rainwater (R2) is stored through the sewage sorter (4) to filter the fallen leaves and dust, and the secondary rainwater storage tank (2) Rainwater is introduced through the filtration valve 5 of the multi-stage separator 62 in a mesh state therein, and a plurality of filter balls 61 are disposed in the separation layer 62a of the multi-stage separator 62. Rainwater filtration tank (6) in which the physical and chemical filtration of the incoming rainwater is performed, and the third rainwater storage tank (3) in which the filtered rainwater (R3) passing through the rainwater filtration tank (6) is stored.

A plurality of filter balls 61 installed in the rain filtration tank (6), as shown in Figures 2 to 3, the 5 ~ 50 denier bundle of fine polyester fibers through the stress process After elasticity is given to the bundle of ester fibers, tie them in 3 cm ± 1.5 cm intervals using aluminum fixing rings, cut between each fixing ring, and preheat for 3 to 5 minutes at a temperature range of 15 ℃ to 150 ℃. After passing through a rocking panel (not shown) at room temperature, the polyester fiber bundle is reduced and agglomerated around a fixed ring, and then manufactured through a manufacturing method, and a filter ball 61 having a diameter of about 4 cm is illustrated in FIG. 3. It was prepared as such.

The filter ball 61 is made of polyester fiber because the surface of the polyester is formed rough, so that it is easy to collect impurities in the rainwater, polyester fiber was used.

The reason why the filter ball 61 is set to a thickness of 5 to 50 denier is that the greater the specific surface area of the filtration fiber, the better the removal efficiency of contaminants, and the greater the specific surface area of the fiber by using less than 50 denier fibers. As a function of use will be increased.

The reason why the filter ball 61 passes through the rocking panel is that the size of the specific surface area is important as a filter, but the size of the filter ball 61 maintains a certain size and shape at a high flow rate within the rainwater filtration tank 6, Since the ability to recover in the shape of the importance is also important to keep the elasticity of the filter ball 61 by compressing the thin fiber bundle passing through the vibration panel such as rocking panel.

Another feature of the rainwater filtration system A of the present invention is to install a multi-stage separator 62 in the form of a mesh such that the filter ball 61 is not moved in the rainwater filtration tank 6.

The multi-stage separation unit 62 is preferably provided with a plurality of separation layers (62a) consisting of a filtering network having a mesh size of 2cm × 2cm and the separation layer 62a of the even or odd-numbered filtering network of each mesh type filter network. By filling the filter ball 61 in the position of, by the coagulation phenomenon of the contaminants due to the filtering of the rain water can prevent the phenomenon that the filter ball 61 loses the function of the filter by agglomeration and solidification, and filtering The number of charges of the ball 61 can be minimized to enable economical system operation.

Multi-stage separator 62 made of a mesh-type filtering net of the present invention can be variously set according to the size of the rainwater filtration tank (6), the location of the rainwater collection area, the degree of filtration treatment time, the filter ball 61 In view of the filtration capacity of, it is preferable that the interval between the separation layers 62a is set at about 60 cm intervals.

In the present embodiment, the multi-stage separating part 62 installed in the rainwater filtration tank 6 and filled with a plurality of filter balls 61 in multiple stages is provided with a five-stage separation layer 62a. The plurality of filter balls 61 are inserted into the third and fifth separation layers 62a, and the second and fourth separation layers are filled to remain empty spaces. In this way, the multi-stage separation unit 62 installed in the rainwater filtration tank 6 is able to perform the filtration of the rainwater R2 to be filtered more cleanly since the passing rate of the filtered rainwater is slow.

The multi-stage separating unit 62 is composed of a multi-stage separating layer in a mesh state and is introduced into the rainwater filtering tank 6 so that the filter ball 61 is introduced into each mesh state separating layer 62a, and to the rainwater filtering tank 6. As the rainwater R2 is introduced, the pollutants in the rainwater R2 are adsorbed and separated according to the input pressure. The filter ball 61 required when the daily treatment capacity of the rainwater filtration tank 6 is 50 tons is required about 2 rubes, and about 100 tons is required about 5 rubes.

A blower 63 is disposed below the rainwater filtration tank 6 to generate the same as air bubbles when the filter ball 61 is washed to wash the filter ball.

The filtration process of the rainwater filtration tank 6 of the present invention, as shown in Figure 6, is filled in the initial stage of the filter ball 61 (shown in Figure 6a), filtered for a period of time while the rainwater (R2) is passed through When the water flow operation is performed (shown in FIG. 6B), and when the cleaning of the filter ball 61 is required after a certain period of time, a backwashing process is performed through the blower 63 to contaminate the filter ball 61. The material is washed (shown in FIG. 6C), and after the backwashing process, the filter ball 61 is rearranged again. When the rearrangement of the filter ball 61 is completed, the water purification process is again performed through the water supply process (FIG. 6C). 6d and 6a are the same).

As such, the rainwater filtration tank 6 filled with the filtration ball 61 is filtered by the pressure acting in the rainwater filtration tank 6 during operation of the filtration pump 5 and the water pressure of the filtration pump 5. ), And in this process, the pressure in the rainwater filtration tank 6 filled with the filter ball 61 is preferably maintained at 2 kg / cm 2 or less. The compressed filter ball 61 is tangled with each other to form a fine void to perform the function of the filter to filter the rain water (R2), the rain water (R2) processed during the filtration filter ball 61 compressed by the pressure In the backwashing process for washing the filter ball 61, the pressure in the rainwater filtration tank (6) is made to atmospheric pressure after draining (Drain) process of the rainwater filtration tank (6). By using the air and fresh water compressed in the blower 63 and the pressure tank 64 from the bottom to hit the bottom of the filter ball 61 from the bottom to remove contaminants attached to the surface of the filter ball 61, The washing water washed in the filtered filter ball 61 is to be drained through the drain 65 installed in the lower portion.

Hereinafter, the present invention will be described in more detail with reference to the embodiment of the rainwater filtration system according to the present invention. These examples are intended to illustrate the present invention in more detail, and it will be apparent to those skilled in the art that the scope of the present invention is not limited to these examples.

Rainwater filtration systems according to the invention were compared in comparison with sand filters of the same capacity.

The rainwater filtration tank 6 filled with the filter ball 61 of the present invention uses 2 m3 of stainless steel, and installs 4 stages of mesh media filter media of 3 cm × 3 cm, and the first stage, the second stage, and the third stage. In the meantime, 90% of each section was filled with the filter ball 61 at an apparent volume ratio in the lower portion of the fourth stage.

The rainwater of the present invention was treated with 50 ppm of rainwater, and the backwash pump used a product of the standard 1.5㎾ * 0.2m 3 / min.

The performance comparison resulted from the treatment using the same rainwater as the treatment target rainwater in the sand filter of the same capacity as the rainwater filtration system of the present invention is shown in Table 1 below.

Item Filter ball filtration Sand filter Input filter Upflow FILTER ss removal efficiency over 90 90% less than 90% less than Filtration linear velocity [// HR] 30 to 50 8-15 6-12 Backwash time [min / s] 2 to 5 10 to 15 24 hours continuous Back Line Speed [// HR] 30 to 50 10-20 - Backwash amount [%] 5 or less below 10 over 10 Filtration pressure [kg /] 2.0 or less 3 or more 3 or less Backwash pressure [kg /] Less than 2.0 3 or more 3 or more Filter material P.E fiber sand sand Filtration method Downflow (deep filtration) Downflow (Surface Filtration) Upflow (surface filtration) Replace filter media None (10% supplement once a year) Replace more than once a year
(MF more than once a month) 10% supplementation per year

As can be seen from the above performance comparison table, the rainwater filtration system of the present invention has an excellent SS removal efficiency compared to the sand filter, the filter line speed is 3 to 4 times faster than the conventional sand filter, and the backwashing time and the backwashing speed are 1 Filtration of the filter ball according to the present invention in most of the filtration performance, such as / 5 to 1/3, the backwash amount is 1/2 level, the filtration pressure and the backwash pressure is lower than 30%, compared to the conventional sand filter Excellent performance is shown.

Rainwater filtration system according to the present invention will be said to be an industrially applicable invention because it is possible to repeatedly manufacture the same product in the general machinery manufacturing industry and textile industry.

1. Primary rainwater reservoir 2. Secondary rainwater reservoir
3. 3rd rainwater storage tank 4. Sewage sorter
5. Filtration valve 6. Rainwater filtration tank

Claims (3)

delete In the rainwater filtration system (A),
The rainwater filtration system (A) is a primary rainwater storage tank (1) in which rainwater (R1) introduced from the building (B) is introduced and stored;
A secondary rainwater storage tank (2) in which the rainwater (R2) filtered through the filthy water sorter (4) in which the fallen leaves or dust are filtered out while the rainwater (R1) stored in the primary rainwater storage tank (1) flows out;
Rainwater is introduced through the filtration valve 5 of the secondary rainwater storage tank 2, and a multistage separator 62 in a mesh state is installed therein, and a plurality of filter balls 61 are disposed in the multistage separator 62. A rainwater filtration tank 6 disposed in the separation layer 62a to perform physical and chemical filtration of the introduced rainwater,
And a third rainwater storage tank 3 in which the filtered rainwater R3 passing through the rainwater filtration tank 6 is stored.
The rainwater filtration tank (6) is provided with a multi-stage separation unit (62) of a mesh shape such that the filter ball (61) does not move therein,
The multi-stage separator 62 is composed of a multi-stage separation layer in a mesh state, and is introduced into the rainwater filtration tank 6 to insert a plurality of filter balls 61 into each mesh state separation layer 62a.
A blower 63 and a pressure tank 64 are installed in a lower portion of the rainwater filtration tank 6 so as to communicate with each other.
Rainwater filtration system, characterized in that the drain portion 65 is installed on the bottom of the rainwater filtration tank (6)
3. The method of claim 2,
The plurality of filter balls 61 installed in the rainwater filtration tank 6 are made of aluminum after elasticity is applied to the bundle of polyester fibers through a stress process of tensioning and releasing the fine polyester fiber bundle of 5 to 50 denier or more. After using a fixing ring tied to the interval of 3 cm ± 1.5 cm and then cut between each fixing ring, the rain water characterized in that the pre-heated for 3 to 5 minutes in the temperature range between 15 ℃ ~ 150 ℃ is used Filtration system

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