KR100981387B1 - Filtration system using porous media - Google Patents

Abstract

PURPOSE: A filtering apparatus using a porous filter media is provided to very quickly backwash the porous filter media to maintain processing capability of a filter layer and to efficiently remove suspended materials by performing a backwashing process using a small power. CONSTITUTION: A filtering apparatus comprises: a housing; a filter cartridge(111) which accepts a porous filter media(113) and includes a plurality minute holes on the circumference of the filter cartridge; a filter paper(121) including a screen(1213), a thick san layer(1214), and the porous filter media on a support stand(1211) and a sidewall(1212); an inlet pipe(15) for supplying inflow water to an inner space(130) limited to the filter cartridge and the filter paper; an outlet(17) which is located on the upper part of the housing; an overflow pipe(16) which is connected to the bottom(12) of the housing; and a backwashing water pump(P).

Description

Filtration system using porous media {Filtration system using porous media}

The present invention relates to a filtration apparatus using a porous filter medium as a filter medium, in particular, can be used for the high-treatment or pre-treatment of the treated water in the sewage treatment plant for sewage treatment.

Sewage or sewage transferred from various sewage sources to drainage treatment facilities, such as sewage treatment plants, is discharged to public waters through advanced purification processes through each purification process of sewage treatment plants.

Sewage treatment plants usually clean sewage through tertiary treatment, which is a process that physically separates solids or liquids. Organic sludge generated by primary treatment is incinerated and / or landfilled for disposal or fertilizer. Alternatively, it can be used as a land improvement system. After the first treatment process, the untreated organic material is subjected to the second treatment process by various biological treatment methods, and then the third treatment is advanced based on the advanced treatment technology.

The present invention uses a light weight porous filter for the second treated water in the sewage treatment plant, so that the filtration speed is fast and the backwashing is very easy, so that the slow filtration rate and the disadvantage of the general sand filter used in the existing gravity filtration device If it is necessary to solve the difficulties of backwashing at one time and additionally remove the total phosphorus (TP), which is a projected film material such as rivers and lakes, the chemical coagulation function can be performed simultaneously in the filtration system. It is designed to improve processing capacity.

As described above, the present invention enables the advanced treatment of the secondary treated water through the porous media, while the media, for example, on the side of the hexahedron with the top open to improve the treatment capacity as compared to the conventional filtration device. Fill the porous media to use.

In addition, in order to overcome the problem of lowering the filtration efficiency of the filtration device using the porous media according to the present invention, if the backwashing means of the filtration device needs to be removed and the total phosphorus (TP) needs to be removed, the same process is filtered. It is characterized by further comprising in the apparatus.

According to the description of the present invention, the present invention allows the second treated water in the sewage treatment plant to be further filtered through the porous media to discharge the treated water into public water or provided as a pre-treated water of heavy water.

In addition, the present invention is to be able to remove the suspended solids by performing a backwashing with a very small power because the backwashing speed is very light and the backwashing speed is light to maintain the treatment capacity of the filter layer.

The present invention is a hexahedron, preferably formed of a cube formed of a cube, the upper side can be filtered at four sides and one bottom except for the top surface, and the cube can be reduced in size and installation costs Not only that, but also significant savings in operating costs.

Now, the filtration device using the porous media of the present invention will be described in more detail with reference to the accompanying drawings.

1 is a schematic cross-sectional view of a filtration device according to a first embodiment of the present invention, Figure 2 is a plan view of the filtration device shown in FIG.

The filtration device according to the invention has a housing surrounded by a bottom face 12 and a side face 11 arranged vertically along the periphery of the bottom face 12, on the side face 11 and the bottom face 12. A plurality of filtration layers arranged in parallel is provided in the housing already described.

The filtering device of the present invention includes a filtration cartridge 111 in parallel with the side 11, the filtration cartridge 111 is disposed apart from the side 11 to form a filtration cartridge perpendicular to the ground ( A first space is provided between the 111 and the side 11. This first space will be used as a passage through which the treated water filtered by the filter cartridge 111 is discharged.

A filter bed 121 is provided in parallel with the bottom surface 12, and the filter paper 121 is disposed to be separated from the bottom surface 12 to be disposed between the filter paper 121 and the bottom surface 12. Provide 2 spaces. The second space may be used as a passage through which the treated water guided to the first space moves along with the treated water filtered through the filter paper 121 in communication with the first space. The treated water is discharged to the outside through the outlet port 16 provided in the housing bottom surface (12).

The filter cartridge 111 has a structure capable of accommodating the porous media 113 and is provided with a plurality of micropores (not shown) to enable the inflow and outflow of the inflow water. As is already well known to those skilled in the art, the micropore diameter of the filter cartridge 111 is smaller than the particle size of the porous media 113 to prevent the outflow of the porous media 113.

Optionally, the porous media 113 to be accommodated in the filter cartridge 111 has a diameter of 1.5 mm or less, and the micropores of the filter cartridge 111 are drilled to a size of about 1.3 mm.

The filter paper 121 is disposed parallel to the bottom surface 12 of the housing as described above, which is filled with the porous media 123. The structure of the filter paper 121 refers to the arc of FIG. 1.

Referring to the drawings, the filter paper 121 is composed of a support 1211, a side wall 1212 surrounding the support 1211, a screen 1213, a coarse sand layer 1214, and a porous media 123. . More specifically, the support 1211 makes it possible to fully support the porous media as well as the screen, coarse sand layer to be seated thereon. The screen 1213 is spread out on the support 1211. The screen 1213 is preferably selected to have a dense structure to prevent coarse sand from leaking to the bottom of the filter paper 121. For example, the coarse sand constituting the coarse sand layer 1214 has a particle size of 2 to 3 mm and is mounted on the screen 1213 having a dense gap so that coarse sand cannot penetrate. The screen may be stacked in multiple layers to prevent the outflow of coarse sand. Preferably, screen 1213 is capable of using a non-woven fabric, in particular a wire mesh, which not only allows for smooth flow of treated or backwash water, but also prevents the loss of material (eg, sand, etc.) to be deposited thereon. have.

The porous media 123 is seated on the coarse sand layer 1214, and filters the influent into the inner space 130. Optionally, the size of the porous media 123 may be 0.3 ~ 1.0mm. The filtered water is guided through the coarse sand layer 1214, the screen 1213, and the support 1211 to the second space.

A coarse sand layer 1214 and a porous media 123 are arranged on the support 1211, with the screen 1213 placed on the support 1211 as described above to prevent its loss and around the edge of the support 1211. A side wall 1212 having a predetermined depth, that is, a size sufficient to accommodate the coarse sand layer 1214 and the porous media 123 is provided.

The filter paper 121 having such a structure is installed to open the upper surface (without reference numeral) so that the inflow water can directly contact the porous media 123.

During backwashing, backwashing water that penetrates the support, the screen and the coarse sand layer showing significant clearance separates the sediment attached to the porous media 123. When the backwashing process is completed, the porous filter medium 123 may be disposed on the coarse sand layer 1214 to perform filtration.

As shown, the filtration device according to the first embodiment of the present invention is supplied with the influent to be treated by the filtration device through the inlet (15). This influent flows through the filter cartridge 111 located at the side 11 of the housing and is filtered through the porous media 113 to flow into the first space, and at the same time the filter paper 121 located on the bottom surface 12 is opened. The sludge filtered through the porous media of the filter cartridge 111 and the filter paper 121 is treated to penetrate through the second space and discharged to the outlet 16 along the second space. And the porous filter medium accommodated in the filter paper 121 and the filter cartridge and the inner surface of the filter field.

The deposits of the filter cartridge 111 and the filter paper 121 are blocked by the stacking of the precipitates, thereby reducing the filtration efficiency. In order to solve this problem, the present invention includes a separate backwashing facility.

The backwash water pump P filters the filter paper and the filtration through the filter paper 121 located on the bottom 12 of the housing and the pipe 30 extending into the filter cartridge 111 located on the side 11 of the housing. Backwash water is supplied into a plurality of filter beds formed from cartridges. The backwash water is injected in a direction opposite to the flow direction in which the influent is filtered, and deposits deposited on the filter cartridge 111 and the filter paper 121 to the inner space 130 surrounded by the filter cartridge 111 and the filter paper 121. Dispersion can prevent clogging of the filter cartridge and the filter paper.

The precipitate dispersed in the backwash is floated to the upper portion of the inner space 130 and then discharged to the outside through the discharge port 17 provided at the upper portion of the housing.

1 and 2, the inner space 130 is formed of the filter cartridge 111 and the filter paper 121, the present invention is arranged the filter cartridge 111 on the four sides to form the internal space of the cube And the filter paper is arranged on the bottom surface, the top surface is characterized in that it does not have a separate filter layer.

Optionally, the branch pipe split from the outlet 16 is in fluid communication with the backwash water pump P and returned to the housing so that a portion of the treated water to be discharged to the outlet 16 is used as backwash water.

The arrow shown in the figure shows a path moving along the treatment process of the influent water introduced into the inlet 15, except for the path discharged to the outlet 17 for the inlet of the backwash water.

3 is a schematic cross-sectional view of a filtration device according to a second embodiment of the present invention, and FIG. 4 is a plan view of the filtration device shown in FIG. 3.

The filtration device according to the second embodiment of the present invention includes the same filtration layer as the filtration device shown in FIGS. 1 and 2, and includes a filtration cartridge 111 in parallel with the side surface 11. The 111 is spaced apart from the side 11 to provide a first space between the filter cartridge 111 and the side 11. The first space will provide a passage through which the treated water filtered by the filter cartridge 111 is discharged. The bottom surface 12 includes a filter paper 121, which is disposed apart from the bottom surface 12 to provide a second space between the filter paper 121 and the bottom surface 12. The second space will provide a passage through which the treated water guided to the first space moves along with the treated water filtered by the filter paper 121. The treated water is discharged to the outside through the outlet 16 provided on the bottom of the housing.

As shown, the filtration device according to the second embodiment of the present invention is supplied with the inflow water to be treated by the filtration device through the inlet (15). This influent flows through the filter cartridge 111 located at the side 11 of the housing and is filtered through the porous media 113 to flow into the first space, and at the same time passes through the filter paper 121 located at the bottom 12. It is processed while being discharged to the outlet 16 along the second space. In the second embodiment of the present invention, in addition to the filtration treatment of the first embodiment, the flocculant may be administered to the influent through the chemical injector 18 so as to add a coagulation treatment step of the contaminants.

In the filtration process, the sludge to be precipitated is deposited on the filter cartridge 111, in particular the filter paper 121 over time. The deposits of the filter cartridge 111 and the filter paper 121 are blocked by the stacking of the precipitates, thereby reducing the filtration efficiency. In order to solve this problem, the present invention includes a separate backwashing facility.

The backwash water pump P filters the filter paper and the filtration through the filter paper 121 located on the bottom 12 of the housing and the pipe 30 extending into the filter cartridge 111 located on the side 11 of the housing. Backwash water is supplied into a plurality of filter beds formed from cartridges. The backwash water is injected in a direction opposite to the flow direction in which the influent is filtered, and deposits deposited on the filter cartridge 111 and the filter paper 121 to the inner space 130 surrounded by the filter cartridge 111 and the filter paper 121. Dispersion can prevent clogging of the filter cartridge and the filter paper.

The pipe 30 which is interconnected from the backwash water pump P to the filter cartridge 111 and the filter paper 121 supplies the backwash water to the filter cartridge and the filter paper. The backwash water thus supplied floats the dispersed precipitate to the upper portion of the inner space 130 and is discharged to the outside through the discharge port 17 provided at the upper portion of the housing.

In addition, the precipitate to be stacked in the inner space 130 is continuously flowed into the inflow water introduced into the inner space 130 via the rotary stirrer 40 to delay the sedimentation rate of the precipitate as much as possible filter paper 121 and filtration It does not sink onto the inner surface of the cartridge 111. In addition, the rotary stirrer 40 mixes the inflow water introduced into the internal space 130 and the coagulant to be supplied to the chemical injector 18 to assist the coagulation of the contaminants.

Optionally, the branch pipe split from the outlet 16 is in fluid communication with the backwash water pump P and returns to the housing a portion of the treated water to be discharged to the outlet 16 for use as backwash water.

Porous filter medium to be used as the filter medium of the present invention is a porous artificial sand is mixed with a blowing agent in a glass powder having a small particle size, the mixture is heated to a high temperature (for example 800 ~ 1,100 ℃) and cooled by pulverizing it to dry the bulk density 0.4 Porous granular media with ˜0.6 g / cm 3 and water saturation of 1.3 to 1.8 g / cm 3 and porosity of 65 to 80% are used for water purification.

The present invention is arranged so that the filter cartridge and the filter paper spaced apart at predetermined intervals from the side and bottom of the housing and supported by the support to replace them. In order to understand and clearly describe the characteristics of the present invention, the description of the structure and arrangement of the support for supporting these filter cartridges and the filter paper is omitted here.

It is also to be understood that the invention is not limited to the foregoing detailed description and accompanying drawings, but may be modified within the scope and scope of the following claims.

1 is a cross-sectional view of a filtration device according to a first embodiment of the present invention.

2 is a plan view of the filtration apparatus according to the first embodiment of FIG.

3 is a cross-sectional view of a filtration device according to a second embodiment of the present invention.

4 is a plan view of the filtration apparatus according to the second embodiment of FIG.

<Description of Symbols for Main Parts of Drawings>

15 ----- inlet pipe, 16 ----- outlet pipe,

17 ----- discharge tube, 18 ----- chemical injector,

20 ----- blower, 30 ----- tubing,

40 ----- rotary stirrer, 111 ----- filter cartridge,

121 ----- filter paper, P ----- pump.

Claims (8)

A housing surrounded by a side face 11 and a bottom face 12; Filtration with a plurality of micropores on the circumferential surface of the housing 11 spaced apart a predetermined distance from the housing 11, receiving the porous media 113, forming a filtering surface parallel to the side and perpendicular to the ground Cartridge 111; A screen 1213, a coarse sand layer 1214, and a porous layer are formed in the housing 1211 and spaced apart by a predetermined distance from the bottom surface 12 of the housing and formed of sidewalls 1212 along the periphery of the support 1211. Filter paper 121 in which the filter medium 123 is arranged; An inlet pipe 15 for supplying inflow water into the inner space 130 defined by the filter cartridge 111 and the filter paper 121 in the housing; A discharge port 17 positioned above the housing and configured to discharge the backwash water or the overflowed water to the outside; An outlet pipe 16 in fluid communication with the bottom surface 12 of the housing; Consists of a backwash water pump (P) for supplying backwash water to the filter cartridge 111 and the filter paper 121, The porous media 113 and 123 are granular bodies obtained by heating a mixture of a blowing agent in a glass powder having a small particle size to a high temperature and cooling and pulverizing it, which granules have a bulk density of 0.4 to 0.6 g / cm 3 when dried. When water saturates, it is 1.3 to 1.8 g / cm 3, and the porosity is 65 to 80%. The porous filter 113 filling the filter cartridge 111 has a particle size of 1.5 mm or less, and the porous filter 123 filled in the filter paper 121 has a porous filter having a particle size of 0.3 to 1.0 mm. Filtration equipment used. According to claim 1, wherein the internal space 130 is a filtration device using a porous medium having a hexahedron with an open top. According to claim 1, wherein the backwash water is in communication with each other from the pump (P) to the filter cartridge 111 and the filter paper 121 to supply the backwash water into the filter cartridge 111 and the filter paper 121. Filtration device using a porous medium supplied to the pipe (30). The filter apparatus according to claim 1, further comprising a chemical injector (18) for introducing a coagulant into the housing. delete delete According to claim 1, Filter apparatus using a porous medium further comprising a rotary stirrer (40) in the inner space (130). The filter apparatus according to claim 1, wherein the screen 1213 is made of at least one wire mesh.

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