KR101695467B1 - Filtering apparatus provided with ceramic filter - Google Patents

Abstract

The present invention relates to a filtration apparatus equipped with a ceramic filter, which is used for treatment of wastewater. According to the present invention, provided is the filtration apparatus equipped with a ceramic filter, the filtration apparatus comprising: a housing which forms a sealed space; and a separation membrane-type filtration unit which is installed inside the housing in a lateral direction, and which partitions an inside of the housing into an upper space and a lower space; wherein an air inlet and a filtrated water outlet are formed on a side of the housing forming the upper space, a raw water inlet and an air outlet are formed on a side of the housing forming the lower space, and the filtration unit includes a ceramic filter and operates in an up-flow manner. In the filtration apparatus equipped with a ceramic filter according to the present invention, a filtration layer is formed by using a cartridge-type ceramic filter. Accordingly, a back washing process and maintenance and repair are facilitated, the ratios of volume and power to treatment capacity can be reduced, and a size of the pores of the ceramic filter can be adjusted in various manners, thereby maximizing filtration efficiency for each step.

Description

TECHNICAL FIELD [0001] The present invention relates to a filtration apparatus having a ceramic filter,

The present invention relates to a filtration apparatus used for wastewater treatment.

Conventionally, a sand filtration apparatus has been widely used for treating wastewater. In general, sand filtration is a method of removing impurities in raw water by using a sand filter bed, which is gravity type and pressure type. Gravity type has slow sand filtration and rapid sand filtration. The former usually filters the precipitate, while the latter filters the precipitate. Pressure type requires a sealed container such as a tank, and is used in small-scale waterworks, buildings, and factories. In this case, the effective diameter of sand used is 0.3 ~ 0.45㎜ in slow filtration, 0.45 ~ 0.70㎜ in rapid filtration, and hard and uniform sand with a high quartz quality (homogeneity coefficient is 2.0 or less), and soft impurities such as clay What is not implied is used. The sand filtration is divided into the downflow type and the upward flow type according to the inflow and filtration direction and repeats a series of processes accompanied with a backwashing process after a certain filtration operation.

These sand filtration processes have been widely used for wastewater treatment filtration. However, it is difficult to remove the filtrate from the sand filter media and it is also difficult to manage the sand filter media. This is because when the sand filtration material is sandwiched by a large amount of filtrate in the sand filtration material, it is difficult to remove the filtrate by turning over the sand filter material layer. Also, managing the small sand particles contained in the filtration tank causes a great inconvenience in the field.

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It is an object of the present invention to provide a filtration apparatus for treating wastewater of a new structure which can be easily backwashed and maintained in place of the conventional sand filtration apparatus, can reduce volume and power ratio in relation to the treatment capacity, will be.

The present inventors have found that, in the process of researching and developing a filtration apparatus for treating wastewater with a new structure, the filtration process is not performed inside the thick sand filter layer as in the conventional sand filtration, A filtration process is carried out from the outside to the surface and the filtrate accumulated on the surface is removed to pay attention to the way that the backwashing process is performed. When such a separation membrane is constituted by a ceramic filter of a cartridge type, maintenance of the device is facilitated The processing capacity and the filtration efficiency can be improved, and the mechanical design related thereto is further specified, leading to the present invention. The gist of the present invention related to the above problem is as follows.

(1) a housing forming a sealed space; And a separation membrane type filtration unit mounted laterally inside the housing to divide the inside of the housing into an upper space and a lower space, and an air inlet and a filtration water outlet are formed on the housing side forming the upper space , And a raw water inlet and an air outlet are formed on the housing side forming the lower space, respectively, and the filtration unit includes a ceramic filter.

(2) The upflow type ceramic filter filtering apparatus according to (1), wherein the housing has a structure in which the first housing member and the second housing member are detachably coupled.

(3) The filtration unit includes a pair of frames for holding and fixing the edges of the ceramic filter, and a cartridge composed of a ceramic filter and a pair of frames is detachably installed between the first housing member and the second housing member (2) above, characterized in that the filter is coupled to the filter.

(4) The upflow type ceramic filter filtering apparatus according to (3), wherein the pair of frames has a lattice structure, and the ceramic filters are provided in plural and are arranged in parallel corresponding to the gratings.

(5) The upflow type ceramic filter filtering apparatus according to (1), wherein at least one of the upper space and the lower space has a support member provided in a direction perpendicular to the filtration unit.

(6) The ceramic filter device according to any one of (1) to (5) above, wherein the ceramic filter device has a vertically symmetrical structure and the role of the air inlet and the air outlet, and the role of the filtered water outlet and the raw water inlet, Wherein the upflow-type ceramic filter is disposed in the upper-stream ceramic filter.

The ceramic filter apparatus for treating wastewater according to the present invention can easily back up and maintain, and can reduce the volume and power ratio of the ceramic filter. By varying the parameters, it is possible to maximize filtration efficiency.

1 is a perspective view and a bottom perspective view of a ceramic filter apparatus according to an embodiment of the present invention;
FIG. 2 is an exploded perspective view of the ceramic filter apparatus of FIG. 1; FIG.
3 is a longitudinal cross-sectional view of the ceramic filter apparatus of FIG. 1;
4 is an engaging state cross-sectional view of a cartridge type filtration unit according to an embodiment of the present invention.
5 is a perspective view of a ceramic filter according to an embodiment of the present invention.
6 is a perspective view and a top view of a first frame according to an embodiment of the present invention;
7 is a perspective view, a plan view, and a cross-sectional view of a second frame according to an embodiment of the present invention;

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same or similar reference numerals are given to the same or similar parts. Also, when an element is referred to as " including " an element throughout the specification, it does not exclude other elements unless specifically stated to the contrary. It is to be understood that the present invention may be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. .

First, the overall structure of a ceramic filter filtering apparatus according to an embodiment of the present invention and the structure of each component element constituting the ceramic filter filtering apparatus will be described in detail and the operation contents of the ceramic filter filtering apparatus will be described.

FIG. 1 is a perspective view and a bottom perspective view of a ceramic filter apparatus according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the ceramic filter apparatus, and FIG. 3 is a longitudinal sectional view of the ceramic filter apparatus. The ceramic filter apparatus 10 according to the embodiment includes a housing 200 and a filtration unit 100. 3, the bolt fastening structure of the housing 200 and the filtration unit 100 is omitted for the sake of convenience.

In an embodiment, the housing 200 is provided with a first housing (not shown) for facilitating maintenance such as cleaning of the interior of the ceramic filter filtration device, or replacement, repair, and cleaning of components for the filtration unit 100 contained therein. It is preferable that the member 210 and the housing member 220 are separated from each other. The first housing member 210 and the second housing member 210 are respectively provided with flanges 216 and 226 extending outwardly along the end sides of the first housing member 210 and the second housing member 210, As shown in FIG. In this case, the sizes and shapes of the first housing member 210 and the second housing member 220 are substantially the same, and thus the shape of the ceramic filter device 10 is symmetrical in the vertical direction.

The first housing member 210 is provided with an air inlet 212 and a filtered water outlet 214. The second housing member 220 is provided with a raw water inlet 222 and an air outlet 224 do. A blower (not shown) for supplying outside air is connected to the air inlet 212 and a pump (not shown) for supplying the raw water to be filtered is connected to the raw water inlet 224 . A valve (not shown) for controlling supply and discharge of air and raw water is provided on each of the air inlet 212 and the air outlet 224, and on the side of the raw water inlet 222 and the filtered water outlet 214 .

The raw water inlet 222 and the filtered water outlet 214 are paired to form an upward flow filtration process and the air inlet 212 and the air outlet 224 are paired to participate in the backwash process. In this case, in a state where the first housing member 210 and the second housing member 220 are coupled, a pair of the air inlet 212 and the air outlet 224, and a pair of the raw water inlet 222 and the filtered water outlet 214, Is preferably positioned to be symmetrical in the diagonal direction. Accordingly, the retention time of the raw water is increased in the filtration process to increase the filtration efficiency, and conversely, the backwash efficiency can be increased by increasing the residence time of the air in the backwash process using the air.

The jaws 219 and 229 are formed along the inner side edges of the first housing member 210 and the second housing member 220 which are in contact with each other and the first housing member 210 and the second housing member 220 The support members 218 and 228 extending in the vertical direction are integrally formed. The jaws 218 and 219 serve to firmly receive and support the frame elements 110 and 120 of the filtration unit 100 described below and the support members 218 and 228 support the filtration unit 100, Thereby preventing the filtration unit 100 from being damaged by air pressure or water pressure in the backwashing process or the filtration process in the filter filtration device 10. [

Figure 4 shows a combined state sectional view of a cartridge type filtration unit 100 according to an embodiment of the present invention. 6 and 7 are a perspective view, a plan view and a perspective view of the first frame 110 and the second frame 120 constituting the filtration unit 100, respectively. Figs. 6 and 7 are perspective views of the ceramic filter 130 constituting the filtration unit, Respectively. 4, the bolt fastening structure between the first frame 110 and the second frame 120 is omitted for the sake of convenience.

The filtration unit 100, which is one of the features of the present invention, includes a ceramic filter 130 and a frame for holding the ceramic filter 130 fixedly. That is, instead of the thick sand filter material layer as in the conventional sand filtration device, the filter material of the ceramic filter device 10 may be formed as a filtration unit 100 in the form of a thin separation membrane including the ceramic filter 130, The filtration unit 100 can be provided in the form of a cartridge in which the ceramic filter 130 and the frame are integrated to facilitate maintenance such as cleaning, repair and replacement of parts.

In the embodiment, the first frame 110 and the second frame 120 are divided into four surface regions of the entire filtration unit 100, and the plurality of ceramic filters (130; 130a, 130b, 130c, and 130d are arranged in parallel and detachably coupled. The number of the ceramic filters 130 and the number of lattice elements of the frame corresponding to the number of the ceramic filters 130 are divided into a plurality of portions so that the water pressure by the raw water in the lower space of the housing 100 in the direction of the upper space, The atmospheric pressure by the external air in the direction of the filter unit 100 can be effectively dispersed and applied to the filtration unit 100, thereby further improving the durability of the ceramic filter apparatus 10.

The ceramic filter 130 of FIG. 5 has a rectangular shape and includes a pore channel (not shown) of several hundreds of micrometers. The ceramic filter 130 has an inlet (not shown) The filtered raw water is filtered while passing through the ceramic filter 130, stored in the upper space of the housing 200, and then discharged to the outside through the filtered water outlet 214. Solids that do not pass through the pore channels of the ceramic filter 130 remain on the lower space of the housing 220 and on the lower surface of the ceramic filter 130 facing it.

6 and 7, the frame includes a first frame 110 of FIG. 6 and a second frame 120 of FIG. 7, and the first frame 110 and the second frame 120 ) Each have the same grating structure as the grate. Each of the first frame 110 and the second frame 120 is formed by integrally forming pairs of cross bars 114 and 124 which are perpendicular to each other and rectangular cross-sections 112 and 122 and cross bars 114 and 124 The inner regions of the outer casings 112 and 114 are divided into four regions. The first housing member 210 and the second housing member 220 are integrally formed at the intersection of the first frame 110 and the cross bars 114 and 124 of the second frame 120, 218, and 228, respectively.

The assembly structure of the filtration unit 100 itself and the coupling structure with the housing 100 will be described in more detail. The outer frame 122 and the crossbar 124 of the second frame 120 are formed with a chin 129 for supporting the edges of the ceramic filter 130 of FIG. In this case, the height of the jaw portion 129 is substantially the same as the thickness of the ceramic filter 130. The thicker portion 128 protrudes below the outer frame 122 and the crossbar 124 of the second frame 120. The outermost size and thickness of the thicker portion 128 are larger than the outer frame 122 of the first frame 110, And has a size substantially the same as the outermost size and thickness of the outer layer 122. The lattice area formed by the outer frame 112 and the crossbar 114 of the first frame 110 is smaller than that of the ceramic filter 130. The first frame 110 and the second frame 120 are connected to the respective outer casings 112 and 112 in a state in which the ceramic filter 130 is stably supported and seated on the jaw 129 during the assembly of the filtration unit 100. [ 114 and the crossbars 114, 124 to form a cartridge type filtration unit 100 that is rigid and has an airtightness. Each of the outer frame 112 of the first frame 110 and the thick portion 128 of the second frame 120 has the same shape as that of the first housing member 210 and the second housing member 210, The filtration unit 100 is fixed to the first housing member (not shown) by the bolt fastening holes provided along the periphery of the outer frame 122 of the second frame 120, 210 and the second housing member 210 so as to secure airtightness.

The filtration unit 100 in the assembled state has a symmetrical structure in the upper, lower, and left and right directions apparently. The first housing member 210 and the second housing member 220 constituting the housing 200 have the same size and shape as described above so that the ceramic filter apparatus 10 has the entirety The outer shape and structure have a perfect symmetrical structure in the vertical direction and can be suitably switched and used as needed. For example, with respect to the ceramic filter 10 used for a predetermined period of time, the first housing member 210 and the second housing member 220 form a lower space, And the use of the air and the outlet of the raw water in each of the housings is switched and used to increase the service life and durability of the ceramic filter 10.

Next, operation and maintenance of the ceramic filter 10 according to the embodiment of the present invention will be described.

The filtration process by the ceramic filter 10 operates in an upward flow mode. First, a valve (not shown) is used to close the air inlet 210 and the air outlet 224 and to open the raw water inlet 222 and the filtered water outlet 214, The raw water to be treated is introduced into the lower space partitioned by the second housing member 220 and the filtration unit 100 through the raw water inlet port 222. When raw water fills the lower space and reaches the lower surface of the filtration unit 100, it permeates a pore channel (not shown) of several hundred micrometers provided in the ceramic filter 130 (130a, 130b, 130c, 130d) And then is stored in the upper space partitioned by the first housing member 210 and the filtration unit 100 and discharged to the outside through the filtration water outlet 214. [ The solid matter which has not passed through the pore channels of the ceramic filter 130 remains on the lower space of the housing 220 and on the lower surface of the ceramic filter 130 facing the lower space of the housing 220. In this case, The deterioration of the filtration area in the ceramic filter 130 can be sufficiently retarded or suppressed because the solids remaining on the lower surface of the ceramic filter 130 can easily be separated by the vortex formed in the ceramic filter 130. This filtration process uses the filtration unit 100 including the thin ceramic separator to make the filter material layer relatively thin to reduce the size and volume of the device and to reduce the power ratio while utilizing the entire area of the filtration unit 100, By performing the filtration process for a sufficient time without reduction in the performance, the filtration efficiency and the processing capacity of the device in terms of size, volume and power can be greatly improved. In this case, the pore size of the ceramic filter 30 can be variously adjusted to maximize the filtration efficiency in stages.

As the filtration process of the ceramic filter device 10 is operated for a long time, the filtration efficiency may be lowered due to an increase in concentration of solids or the like in the lower space of the housing 100. Therefore, periodic backwashing process Do. This backwash process operates in a downflow fashion as opposed to a filtration process. First, the raw water inlet 22 and the filtered water outlet 214 are closed by using a valve to stop the filtration process. Then, the air inlet 210 and the air outlet 224 are opened and a blower Introduces the outside air into the upper space partitioned by the first housing member 210 and the filtration unit 100 through the air inlet 210. As the external air is filled in the upper space, the raw water that has been filled in the upper space is pressed downward and flows downward through the ceramic filter 130 (130a, 130b, 130c, 130d) of the filtration unit 100 to the second housing member 220 Moves to the lower space partitioned by the filtration unit 100 and is discharged to the outside together with the solids through the air outlet 224. In this process, fine solids particles deposited on the lower surfaces of the ceramic filters 130 (130a, 130b, 130c, and 130d) are also removed so that the lower surfaces of the ceramic filters 1130 (130a, 130b, 130c, and 130d) . This backwashing process is continued until all the raw water is discharged from the lower space, and may be continued for a certain period of time by using only outside air after the raw water is discharged as necessary.

The filtration process and backwash process of the ceramic filter device 10 according to the present invention can be realized by forming the filter material layer with the filtration unit 100 of the separation membrane type so as to perform the filtration process from the outside to the surface thereof, It is possible to effectively solve the problem that the backwashing process becomes difficult due to the filtration process performed inside the thick sand filter medium layer as in the conventional sand filtration and the filtration process and backwash process can be performed in excess of the excessive amount of the ceramic filter It is also advantageous for continuous operation for a long time by repeating periodically without interruption. In addition, since the structure of the ceramic filter 10 is symmetrical, it is possible to change the installation form during long-time operation and switch and operate the component elements and each part, thereby reducing the structural fatigue of the apparatus and improving the durability. In addition, the filtration unit 100 and its component elements and the housing elements 110 and 120 can be easily attached and detached, thereby facilitating maintenance work such as repair, washing, and exchange.

The foregoing is a description of specific embodiments of the present invention. While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments or constructions. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. It should be understood that this is possible.

For example, in the present invention, the housing 100 constituting the ceramic filter filtration apparatus 10 is an element for forming a closed space in the inside and dividing its internal space into upper and lower directions by the membrane filtration unit 100, The first housing member 210 and the second housing member 220 are not limited to be separated from each other and may be integrally formed as in the embodiment.

Also, in the embodiment, the frame is configured as a pair of the first frame 110 and the second frame 120, but it is also possible to constitute a single frame element. In this case, it is also possible to constitute a single frame element and appropriately process the edges of the ceramic filter 130 and connect them to the frame element in a manner such as a screw.

Although the number of the ceramic filters 130 is four in the embodiment, the number and the size of the ceramic filter 130 can be appropriately selected according to the filtration capacity required for the ceramic filter 10 according to the use environment Of course. For example, if a small amount of filtering capacity is required, one ceramic filter 130 may be sufficient if the external pressure applied to the ceramic filter 130 in the filtering process or the backwashing process can withstand the internal stiffness of the ceramic filter 130 alone And further the support members 218 and 228 extending from the first housing member 210 and the second housing member 220 may be unnecessary.

The support members 218 and 228 for supporting the filtration unit 100 in the embodiment are formed integrally with the first housing member 210 and the second housing member 220. However, It is also possible to detachably be provided on the member. It is also possible for the support members to have a plurality of support members for supporting the filtration unit 100 having a large area.

Also, in the embodiment, it is exemplified that the support members 218 and 228 are provided in both the upper space and the lower space of the housing 100, but any one space, for example, the air pressure in the backwashing process is relatively weaker than the water pressure in the filtration process It may be sufficient to form the support member 218 only in the upper space in the upflow ceramic filter 10.

In addition, the planar shapes of the frames 110 and 120, the lattice structure thereof, and the ceramic filter 130 are illustrated as rectangular shapes, but the present invention is not limited thereto. For example, the planar shapes may be circular. In this case, the cross-sectional shape of the housing 100 (110, 120) can be circular in accordance with the plane shape of the frame or the ceramic filter.

Also, the ceramic filter unit 10 according to the embodiment can sufficiently ensure the airtightness in the filtration process and the backwash process by the assembly structure between the components. However, if necessary, the ceramic filter unit 130, A packing member such as an O-ring may be additionally provided to the coupling portion between the filtration unit 100 and the housing 200. [

Also, in the embodiment, the air outlet 224 provided in the ceramic filter 10 is arbitrarily named so as to distinguish it from the air provided in the housing or the entrance and exit of the raw water. Despite the terminology, The function as a passage is as described above.

It is therefore to be understood that all such modifications and alterations are intended to fall within the scope of the invention as disclosed in the following claims or their equivalents.

10: Ceramic filter filtration device
100: Filtration unit
110: first frame (upper)
112: External
114: Crossbar
120: second frame (lower)
122: External
124: Crossbar
128: thickening
129: Prong
115, 125: Support groove
130, 130a, 130b, 130c, 130d: Ceramic filter
200: Housing
210: first housing member (upper)
212: Air inlet
214: filtration water outlet
220: second housing member (lower)
222: raw water inlet
224: Air outlet
216, 226: flange
218, 228: Support member
219, 229:

Claims (6)

A housing defining an enclosed space; And a separation membrane type filtration unit mounted in the transverse direction inside the housing to partition the inside of the housing into an upper space and a lower space,
The housing has a structure in which the first housing member and the second housing member are detachably coupled,
Wherein the filtration unit is a dead-end flat membrane type ceramic filter; And a frame for gripping and fixing an edge of the ceramic filter, wherein a cartridge composed of the ceramic filter and the frame is detachably coupled between the first housing member and the second housing member,
An air inlet and a filtered water outlet are formed on the housing side forming the upper space and a raw water inlet and an air outlet are formed on the housing side forming the lower space,
Wherein the water inlet and the filtration water outlet are paired to form an upflow filtration process wherein the air inlet and the air outlet are paired to engage in a downflow backwash process,
The filtration process may be performed by filtering the raw water flowing into the lower space through the raw water inlet with the air inlet and the air outlet being closed and the raw water inlet and the filtered water outlet being opened, And then discharged to the upper space located on the opposite side and then discharged through the filtration water outlet,
Wherein the backwashing process is performed using only outside air instead of reverse osmosis water, and the raw water inlet and the filtered water outlet are closed, and the outside air is discharged through the air inlet Wherein the raw water filled in the upper space passes through the flat ceramic filter and moves to the lower space and is discharged together with the solids remaining in the lower space together with the air outlet. Upflow ceramic filter.
delete delete The upflow type ceramic filter filtering apparatus according to claim 1, wherein the frame has a lattice structure, and the plurality of flat-film ceramic filters are arranged in parallel corresponding to the lattice regions.
The upflow type ceramic filter filtering apparatus according to claim 1, wherein at least one of the upper space and the lower space includes a support member provided in a direction perpendicular to the filtration unit.
The ceramic filter device according to any one of claims 1, 4, and 5, wherein the ceramic filter device has a vertically symmetrical structure, and has a function of the air inlet and the air outlet, Characterized in that the role is switchable.

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