KR20160128141A - Membrane module for water treatment, and apparatus for operating the same - Google Patents

Abstract

The present invention relates to a membrane module for water treatment and an apparatus for operating the same. The membrane module comprises: a plurality of flat sheet-type ceramic membranes which are arranged in parallel at regular intervals; upper and lower plates which support upper and lower ends of the flat sheet-type ceramic membranes, and a membrane cartridge which includes a fastening means configured to fasten the upper and lower plates. The membrane module may further comprise: a plurality of washing plates which are inserted between the flat sheet-type ceramic membranes; and a washing device which includes a pair of frames configured to support both side ends of the washing plates and include a drain hole. The apparatus for operating the membrane module comprises: the membrane module; and a water tank which accommodate the membrane module; wherein the water tank includes an inlet provided at a front end thereof, a return flow portion provided at a rear end thereof, and a filtration discharge portion provided in a lower portion of the membrane module. According to the present invention, a filtration method in which a full waste water filtration method and an orthogonal filtration method are combined together is applied to the flat sheet-type ceramic membrane module, and the washing device is introduced into the flat sheet-type ceramic membrane module, thereby being advantageous to continuous operation and facilitating maintenance and repair.

Description

TECHNICAL FIELD [0001] The present invention relates to a separation membrane module for water treatment, and a separation membrane module using the same. [0002] MEMBRANE MODULE FOR WATER TREATMENT AND APPARATUS FOR OPERATING THE SAME [

The present invention relates to a separation membrane module for water treatment, and more particularly, to a flat membrane type ceramic separation membrane module and an apparatus for operating the same.

In recent years, solid-liquid separation processes are required in various industrial fields such as environmental wastewater treatment, water treatment, waste oil treatment, chemical, food, medicine, refinery and bio. Particularly, in the field of environmental wastewater treatment and water treatment, such solid-liquid separation process is becoming more important with respect to water environment improvement and water reuse.

In the above-mentioned solid-liquid separation process, separation membranes having various shapes and materials are utilized. Particularly, since the ceramic separators have excellent heat resistance, chemical resistance, abrasion resistance, and the like, It is attracting attention.

Such a ceramic separator is classified into an in-out type and an out-in type according to the filtration direction. The outflow type is a method in which the external influent water is introduced from the outside of the separation membrane, filtered, and then discharged through the inside of the separation membrane.

The in-type ceramic separator has a tubular shape having a simple structure and a honeycomb type having a maximized filtration area according to the manufactured shape, and is generally operated in a corss-flow manner. Such a tube type or honeycomb type ceramic separator is advantageous for continuous operation, but it is difficult to remove the ceramic separator if clogging occurs on the surface of the separator, so that maintenance is difficult.

On the other hand, the out-in-type ceramic separator is a flat sheet type manufactured in the form of a plate having a thickness of several millimeters, and is generally operated in a dead-end manner. The flat membrane type ceramic separator has advantages of easy surface cleaning and easy manufacturing, but it has disadvantage in continuous operation because the filtration area per unit volume is small and the whole amount is operated by filtration method and the clogging phenomenon progresses rapidly.

Therefore, although the recent ceramic separator has a filtration performance equal to or higher than that of the polymer separator, there is a need to improve stable and continuous operation of the ceramic separator, especially in the flat membrane type.

It is an object of the present invention to provide a flat membrane type ceramic separator module which is easy to maintain and which is advantageous for stable and continuous operation, and an apparatus for operating the same.

The gist of the present invention regarding the recognition of the above-mentioned problems and the solution means based on the above is as follows.

(1) A ceramic honeycomb structure comprising: a plurality of flat membrane type ceramic separation membranes arranged in parallel at regular intervals; an upper plate and a lower plate for supporting upper and lower ends of each of the plurality of flat membrane type ceramic separation membranes; and fixing means for fixing the upper plate and the lower plate A membrane module comprising a membrane cartridge.

(2) a cleaning device including a plurality of cleaning plates inserted between the plurality of flat film-type ceramic separators, and a pair of frames supporting both side ends of the cleaning plate and having drain holes, Is held between the upper plate and the lower plate.

(3) The separation membrane module according to (2), wherein the cleaning device is reciprocatable in the left-right direction with respect to the separation membrane cartridge.

(4) The separation membrane module according to (2), wherein at least one surface of the cleaning plate is provided with a brush.

(5) The separation membrane module according to any one of (1) to (4) above. And a water tank for containing the separation membrane module, wherein the water tank includes an inlet provided at a front end, a counterflow provided at a rear end, and a filtration drain provided at a lower portion of the separation membrane module. Device.

(6) The apparatus for operating a separation membrane module according to (5), further comprising decompression means connected to the filtration drain port.

(7) The apparatus for operating a separation membrane module according to (5), wherein the water tank is provided with a pair of weirs, and the receiving space of the separation membrane module is partitioned by the pair of weirs.

In the flat membrane type ceramic separator module and the operation device using the same according to the present invention, the filtration method combined with the full-volume filtration method and the orthogonal filtration method are combined and applied, thereby facilitating maintenance and facilitating continuous operation.

Further, according to the present invention, the introduction of the cleaning device into the flat membrane type ceramic separator module is advantageous in terms of continuous operation and maintenance.

FIG. 1 is a perspective view of a combined state of a separation membrane module operation apparatus according to an embodiment of the present invention. FIG.
FIG. 2 is an exploded perspective view of the separation membrane module operation device according to FIG. 1; FIG.
3 and 4 are a perspective view and a bottom perspective view of a separation membrane cartridge according to an embodiment of the present invention.
5 is a sectional view taken along line AA in Fig. 3;
6 is a perspective view of a cleaning apparatus according to an embodiment of the present invention.
7 is a plan view of the cleaning device of Fig.
8 is an exploded perspective view of the cleaning device of Fig.
9 is a perspective view and a plan view of a cleaning plate according to an embodiment of the present invention.
10 is a perspective view of a water tank assembled according to an embodiment of the present invention;
11 is a bottom perspective view of an assembled state of a water tank according to an embodiment of the present invention.
12 is a sectional view taken along the line AA in Fig.
13 is a sectional view taken along line BB of Fig.
FIG. 14 is a conceptual diagram illustrating the operation of the separation membrane module operation device according to FIG. 1. FIG.

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.

In addition, throughout the specification, when an element is referred to as including an element, it is understood that the element may include other elements, not the exclusion of any other element, unless specifically stated otherwise.

Also, it is to be understood that when an element is referred to as being " selectively " provided, included, or included, it is not necessarily an essential component for solving the problem of the present invention, it means.

FIG. 1 is a perspective view of a combined state of a separation membrane module operation device (hereinafter abbreviated as 'operation device') according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of the operation device.

Referring to FIGS. 1 and 2, the operation apparatus 10 includes a separator module and a water tank 300 that accommodates the separator module. The separation membrane module has a basic structure of the separation membrane cartridge 100 and may further include a cleaning device 200 as an alternative.

3 and 4 are a perspective view and a bottom perspective view, respectively, of a separation membrane cartridge according to an embodiment of the present invention, and FIG. 5 is a sectional view taken along line A-A of FIG.

3 to 5, the separation membrane cartridge 100 includes a plurality of flat membrane type ceramic separation membranes 110 (hereinafter referred to as "separation membranes") arranged in parallel at regular intervals, and a plurality of separation membranes 110 Such as a top plate 120 and a bottom plate 130 for supporting the top and bottom ends of the top plate 120 and the bottom plate 130 and a rod for fixing the top plate 120 and the bottom plate 130. The lower plate 130 is slightly wider than the upper plate 120 so that the outer portion of the washing apparatus 200 can be loaded on the upper surface of the lower plate 130 as described later.

The material of the separation membrane 110 is not particularly limited and may be made of an inorganic material such as alumina, titania, silicon carbide, silicon nitride, zirconia, or zeolite.

The upper plate 120 is provided with a plurality of cutting grooves 122 for inserting and fixing the upper end of the separating film 110. The cutout grooves 122 are arranged at regular intervals in the width direction of the upper plate 110.

Meanwhile, in the embodiment of the present invention, the lower plate 130 has a structure in which the first lower plate 130A and the second lower plate 130B are laminated. Screw fixing holes 134A and 134B are formed in the first lower plate 130A and the second lower plate 130B and are coupled by screws (not shown) introduced from the outside of the second lower plate 130B.

The first lower plate 130A and the second lower plate 130B are provided with cutouts 132A and 132B for supporting the lower end of the separator 110, respectively. The spacing of the cutouts 132A and 132B is the same as the spacing of the plurality of cutouts 122 provided in the top plate 120. [ The separation membrane 110 supported by the upper plate 120 and the lower plate 130 is disposed in parallel with the gap between the upper plate 120 and the lower plate 130 at regular intervals.

Referring to FIG. 4, the lower end of the separation membrane 110 is exposed through the cutouts 132A and 132B so as to be visible from the bottom of the second lower plate 130B. In the present invention, the filtration process is performed such that the external influent water flows into the side surface of the separation membrane 110 and is filtered while passing through the separation membrane 110, and then the filtration water is discharged to the lower end of the separation membrane 110 exposed through the slits 132A, . 4, the overall flow direction of the inflow water is a direction perpendicular to the paper surface. That is, the surface of the separation membrane 110 is arranged parallel to the flow direction of water. This filtration process follows a so-called out-in type in which the external influent flows from the outside of the separation membrane 110, is filtered, passes through the inside of the separation membrane 110, and is discharged through the lower end thereof. In the present invention, the out-in type filtration process can be further accelerated by the external decompression means selectively provided in the separation membrane operation apparatus 10 as described later.

The convex portion 112 is provided at the lower end of the separation membrane 110 and the inside of the cutout portions 132A and 132B of the first and second lower plates 130A and 130B is also machined to have a concave shape corresponding thereto. The lower end of the separation membrane 110 may be firmly fixed between the first lower plate 130A and the second lower plate 130B in a state where the first lower plate 130A and the second lower plate 130B are coupled.

That is, in the embodiment, the lower plate 130 is coupled by the first lower plate 130A and the second lower plate 130B, and the first lower plate 130A and the second lower plate 130B correspond to the convex shape of the lower end of the separation membrane 110, The lower end of the separation membrane 110 is fixed more firmly in a state where the first lower plate 130A and the second lower plate 130B are engaged by processing the inside of the cutouts 132A and 132B of the lower plate 130B into concave shapes, .

A plurality of fixing means 140 such as rods are provided to fix the upper plate 120 and the lower plate 130 and upper and lower ends of the fixing means 140 are fixed to the upper plate 120 and the lower plate 130 Respectively. However, the shape of the fixing means 140 is not limited to a rod shape as in the embodiment, and if the flow velocity is not excessively disturbed, the upper plate 120 and the lower plate 120 may be formed of rivets, nails, (130).

In the case of the separation membrane cartridge 100 shown in FIGS. 3 to 5, each of the plurality of flat membrane-type ceramic separation membranes 110 arranged at regular intervals can be easily detached and attached independently of each other. Further, in a state where the separation membrane cartridge 100 is assembled to the operation device 10, the separation membrane 110 surface is arranged in parallel to the flow direction of the water, so that the sludge attached to the surface is cleaned by the cleaning device 200 Since it takes a considerable time to reattach afterwards, it can be advantageously applied to continuous operation.

 As described above, according to an aspect of the present invention, the separation membrane module may further include a cleaning device 200 for cleaning the separation membrane with respect to the separation membrane cartridge 100.

Fig. 6 is a perspective view of a cleaning apparatus according to an embodiment of the present invention, and Fig. 7 is a plan view of the cleaning apparatus. 8 is an exploded perspective view of the cleaning device. 9 is a plan view and a perspective view of a cleaning plate according to an embodiment of the present invention.

6 to 8, the cleaning apparatus 200 includes a pair of frames 220 and a plurality of cleaning plates 210, both ends of which are fixedly supported inside the pair of frames 220 .

2, the plurality of cleaning plates 210 are connected to the upper plate 120 and the lower plate 130, which constitute the separation membrane cartridge 100, with the cleaning device 200 coupled to the separation membrane cartridge 100, And each of the plurality of cleaning plates 210 is positioned between the separation membranes 110. The cleaning plate 210 and the separation membrane 110 are alternately positioned and the surface of the separation membrane 110 is cleaned by friction with the cleaning plate 210 by the linear reciprocating motion of the cleaning apparatus 200 in the left- do. In this case, the left-right linear reciprocation motion of the cleaning apparatus 200 is driven by a driving means (not shown) such as an electric motor, 230 to transmit power.

A puncture groove 222 is provided inside the pair of frames 220. In this case, the spacing distance of the holding grooves 222 corresponds to the spacing distance of the cleaning plate 210, which also corresponds to the spacing of the separating film 110, the spacing distance of the cut-out groove 122 of the top plate 120, Is substantially the same as the spacing distance of the cutouts 132A and 132B of the lower plate 130. [

The cleaning plate 210 includes a pair of first cleaning plates 210A located at the outermost position in a state of being engaged with the frame 220 and a second cleaning plate 210B disposed inside the first cleaning plate 210A. Lt; / RTI > The separation membrane 110 is disposed only inside the first cleaning plate 210A while the second cleaning plate 210B is disposed on both sides of the separation membrane 110 So that one surface of the first cleaning plate 210A is formed in a planar shape and the other surface is processed in the irregularities. On the other hand, the second cleaning plate 210B has irregularities on both surfaces.

FIG. 9 shows a plan view and a perspective view of a cleaning plate, particularly, a second cleaning plate 210B according to an embodiment of the present invention. Referring to FIG. 9, a brush 250 is provided on the uneven surface of the second cleaning plate 210B. The brushes 250 are provided on the recesses of the irregular surface, and can be integrally provided on the cleaning plate or detachably provided. It is also preferable that the brushes 250 are provided alternately at the upper and lower ends of the uneven surface in order not to obstruct the flow velocity. The position and shape of the brush 250 may be the same as that of the first cleaning plate 210A having the uneven surface.

 8, fastening holes 224 and 214 are formed on the inner side of the frame 220 and on the end side of the cleaning plate 210, respectively, and the cleaning plate 210 has its ends Is inserted into the grip groove 222 of the frame 220 and is coupled to the frame 220 by the fastening bar 240.

The pair of frames 220 are provided with drain holes 226. The external inflow water flows into the separation membrane cartridge 100 through the drain hole 226 of one frame and is filtered by the separation membrane 110, Through the drain hole 226 in FIG. Accordingly, the flow of water can be smoothly maintained without being excessively limited by the assembly of the cleaning apparatus 200 and the membrane cartridge.

Meanwhile, a gripping rod 230 may be provided on the upper end of the pair of frames 220. As described above, this gripping rod 230 is connected to external driving means (not shown) and serves as a power transmitting member for transmitting the power to the cleaning apparatus 200. [ Meanwhile, the gripping bar 230 may function as a member gripped when separating the cleaning device 200 from the separation membrane cartridge 100 for maintenance. One or more gripping rods 230 may be provided and may be interference fit with the pair of frames 220 or may be coupled by screws or the like.

 Fig. 10 is a perspective view of the assembled state of the water tank according to the embodiment of the present invention, Fig. 11 is a bottom perspective view of the water tank, Fig. 12 is a sectional view taken along line AA of Fig. Respectively.

In the embodiment, the water tank 300 is illustrated in a form in which the bull 310, the bass tank 320, the aquarium 340, and the bottom tank 330 are assembled by fastening means such as bolts.

The warp 310 has an inlet 312 communicating with a front end side and at least one weir 314 provided at a rear end side. The water stored in the raw water tank (not shown) flows into the rolling mill 310 through the inlet 312 for filtration.

The auxiliary tank 320 has an opening 312 in the shape of a 'C' in a cross section. Outside the opening 312, a bottom tank 330 having a filtered water drain port 332 is coupled to the bottom surface. The separation membrane cartridge 100 described above is inserted into a predetermined space V formed in a state where the inner tank 320 and the bottom tank 330 are coupled to each other and the filtrate water drain port 332 is provided with a separate A decompression means (not shown) is connected.

As described above, in the present invention, the outflow-type filtration process in which the external influent water is introduced from the outside of the separation membrane 110, filtered, and then discharged through the interior of the separation membrane 110 is adopted. A negative pressure is formed in a predetermined space defined by the lower plate 120 of the separation membrane cartridge 100 and the inner wall surface of the bottom tank 330 by the pressure sensor .

The supporter 340 has a weir 344 provided on the front end side and a counter flow port 342 communicating with the bottom surface. A part of the upper end of the half flow passage 342 extends to the inner space of the aftertreatment 340.

The separation membrane module is accommodated in the space in the water tank 300 which is divided by the weir 314 of the rolling mill 310 and the weir 344 of the aftertank 340 so that the weir 314 of the weir 310, The water level corresponding to the height of each of the water level sensors 314 and 344 can be always kept constant.

As a result, the separation membrane module is always kept in a state of being submerged in the water in the state of being accommodated in the water tank 300, thereby preventing the decompression means from operating meaninglessly, and at the same time, So that the filtration efficiency can be increased.

The unfiltered external inflow water is supplied again to the raw water tank (not shown) through the reflux port 342 and the external inflow water supplied to the raw water tank is supplied to the inlet 312 provided in the rolling tank 310 Lt; / RTI > The flow of the water to be filtered is substantially similar to that adopted in the filtration method of the conventional in-out type. This is to compensate for the disadvantages of the out-of-type membrane filtration process adopted in the present invention, so that continuous operation of the membrane module operating apparatus is advantageous.

Next, the operation of the operation device 10 will be described. FIG. 14 is a conceptual diagram of the operation of the separation membrane module operation device according to FIG. 1. FIG. For ease of understanding, the flow of influent water is shown by solid lines and the flow of filtered water by dotted lines.

First, the object to be filtered stored in the raw water tank (not shown) flows through the inlet 312 of the rolling mill 310. When the level of the inflow water reaches the height of the weir 314 provided in the warp 310, the water flows over the weir 314 to the central space of the water bath 300 equipped with the membrane module, Lt; / RTI > In this case, the forward part of the baffle 320 equipped with the separation membrane module is partitioned by the weir 314 provided in the above-mentioned baffle 310, and the rear part thereof is divided by the weir 344 provided in the baffle 340, do. When the water continues to be supplied and the central space of the baffle 320 reaches the weights 314 and 344, the membrane module is sufficiently immersed in water.

(Not shown) connected to the filtered water outlet 332 of the bottom tank 330 in a normal state in which the separator module is sufficiently immersed in water to form a negative pressure with respect to the lower region of the separator module. Specifically, after the bottom tank 330 and the space formed in the bottom plate of the separation membrane cartridge 100 are depressurized to be introduced into the side surface of the separation membrane cartridge 100 and filtered through the inside of the separation membrane 110, 5), and the filtered water collected in the inner space of the bottom tank 340 is discharged to the outside through the discharge port 332 (see FIG. 5) .

Subsequently, the unfiltered external inflow water passes over the weir 344 of the aftertreatment 340, flows into the aftertreatment 340, is discharged through the counterflow 342 and is supplied again to the raw water tank (not shown) The external influent water re-supplied to the raw water tank is circulated in such a manner as to be introduced again through the inlet 312 provided in the rolling mill 310.

As described above, the present invention can facilitate the maintenance of the membrane module operating apparatus by adopting the out-in type in the membrane filtration process. In addition, maintenance of the operating device can be made easier if a cleaning device is additionally provided. On the other hand, the present invention can be advantageously applied to the continuous operation of the separation membrane operation apparatus by introducing the same water flow adopted in the filtration system of the conventional in-out type.

While the foregoing is directed to a specific embodiment of the present invention, it is to be understood that the above-described embodiment of the present invention has been disclosed for the purpose of illustration and is not to be construed as limiting the scope of the present invention, It should be understood that various changes and modifications may be made to the disclosed embodiments without departing from the spirit of the invention.

For example, in the embodiment, the water tank 300 exemplifies the manner in which the bulls 310, the basses 320, the tanks 340, and the bottom tanks 330 are provided as separate components and are coupled to each other, .

The position and the shape of the inlet 312, the half flow 342 and the filtrate outlet 332 provided in the water tank 300 are not limited to the water flow shown in the embodiment and the filtration process in the separation membrane cartridge 100 It is also possible for a person skilled in the art to appropriately change the technical concept according to the implementation situation without changing the technical concept.

Also, the position and shape of the weirs 314 and 344 provided in the water tub 300 may be changed appropriately according to the actual situation.

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: Separator module operating device
100: membrane cartridge
110: flat membrane type ceramic membrane
112: convex portion
120: top plate
122: incision groove
130, 130A, 130B: lower plate
132A and 132B:
134A, 134B: Screw fastening holes
200: Cleaning device
210, 210A, 210B: cleaning plate
214: fastening hole
220: frame
222: gripping groove
224: fastener
226: drain hole
230: Finger Jib
240: fastening rod
250: Brush
300: aquarium
310: Forward
312: inlet
314: Weir
320: Bingo
322:
330:
332: Filtrate outlet
340: Afterglow
342:
344: Weir

Claims (7)

A separation membrane cartridge including a top plate and a bottom plate for supporting the top and bottom ends of each of the plurality of flat membrane type ceramic separation membranes and fixing means for fixing the top plate and the bottom plate, Containing membrane module.
The cleaning apparatus according to claim 1, further comprising: a plurality of cleaning plates inserted between the plurality of flat film-type ceramic separators; and a cleaning device including a pair of frames supporting both side ends of the cleaning plate and provided with drain holes, Wherein the cleaning plate is held between the upper plate and the lower plate.
3. The separation membrane module as claimed in claim 2, wherein the cleaning device is reciprocatable in the left-right direction with respect to the separation membrane cartridge.
The separation membrane module as claimed in claim 2, wherein a brush is provided on at least one side of the cleaning plate.
A separation membrane module according to any one of claims 1 to 4, And a water tank for containing the separation membrane module,
Wherein the water tank includes an inlet provided at a front end thereof, a counterflow provided at a rear end thereof, and a filtration drain provided at a lower portion of the separation membrane module.
The apparatus as claimed in claim 5, further comprising decompression means connected to the filtration drain port.
The apparatus as claimed in claim 5, wherein the water tank is provided with a pair of weirs, and the receiving space of the separator module is partitioned by the pair of weirs.

Images