KR101711570B1 - Open channel spacer for swirl-inducing and membrane filter module using the same - Google Patents

Abstract

Disclosed are open spacers for a membrane filter in order to form a vortex. The open spacers for a membrane filter in order to form a vortex according to the present invention are feed channel spacers disposed between a plurality of filtration members included in a membrane filter module in which the filtration members are stacked on a water purification pipe. The open spacers comprise: a plurality of pillar members which are disposed between filtration members; and a plurality of connection bars which connect the pillar members and which form channels formed between the filtration members and configured such that raw water flows through the channels. In this case, the pillar members comprises: a plurality of main pillars which come in contact with the filtration members and which form spaces in the channels; and a plurality of auxiliary pillars which are connected to the main pillars via the connection bars, which are spaced apart from the filtration members, and which form a first vortex of raw water between the filtration members. According to the present invention, provided may be the open spacers for a membrane filter in order to form a vortex, which can suppress concentration polarization of a membrane and formation of precipitates in order to improve a filtration rate for raw water.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an open-type spacer for vortex formation and a membrane filter module using the open-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an open type spacer for forming a vortex flow in a membrane filter, and a membrane filter using the same. More particularly, the present invention relates to an open type spacer for forming a vortex flow in order to suppress concentration polarization of a membrane and formation of a precipitate Spacers and membrane filters using the same.

In recent years, environmental pollution, especially water pollution, has become a social problem, and the use of water purifiers to remove impurities by physically or chemically filtering water is increasing.

Among these water purifiers, the reverse osmosis membrane type water purifier has a reverse osmosis membrane filter. The reverse osmosis membrane filter applies an artificial pressure to the higher concentration side of the water purifier so that the water, which is a solvent in the high concentration solution, passes through the osmosis membrane and moves toward the low concentration. Is a filter that performs an integer using a function.

1 and 2 show an example of such a reverse osmosis membrane filter 10. The reverse osmosis membrane filter 10 shown in Fig. 1 shows a spiral wound type module in which various kinds of membranes are spirally wound around a central tube 20.

The reverse osmosis membrane filter 10 includes a raw water spacer 40 disposed between the filtration members 30 and spirally wound around the central pipe 20 and surrounded by an outer film 50 made of nonwoven fabric or the like Shape.

1 and 2, the raw water moves in the axial direction of the central pipe 20 through the raw water spacer 40, and some of the raw water flowing in and out is contacted with the surface of the filtration member 30, (Purified water) flows into the inside of the member 30 (the flow path formed by the permeable body spacer disposed between the membrane and the membrane), moves along the flow path formed inside the filtration member 30, (22) formed at one side of the main pipe (20) through the opening (21) formed in the main pipe (20).

The concentrate of living water (concentrated liquid) which does not pass through the surface of the filter member 30 among the raw water introduced through the raw water spacer 40 moves through the raw water spacer 40 and flows into the living water outlet (23).

The filtration member 30 is provided with a constant spacer 32 between the first membrane 31 and the second membrane 33 so that the purified water that has passed through the first membrane 31 or the second membrane 33 flows through the water- (32) to the central pipe (20) and discharged through the opening (21) of the central pipe (20). At this time, one of the first film 31 and the second film 33 is generally formed as a reverse osmosis membrane, but it is also possible to form all the membranes on both sides of the reverse osmosis membrane.

The reverse osmosis membrane filter 10 is made of a reverse osmosis membrane having a 0.0001 micron size to filter heavy metals such as lead and arsenic as well as sodium and various pathogens. The purified water passing through the reverse osmosis membrane is connected to a purified water pipe, (Drain pipe).

As a conventional technique related to a membrane filter, Korean Patent Laid-Open Publication No. 10-2014-92307 discloses a bare membrane element and a permeable carrier, and Korean Patent Laid-Open No. 10-2014-33137 discloses a laminated tubular membrane for chromatography And a method of using the same.

The raw water spacers used in such a membrane filter are for forming the passage through which the raw water moves, and have mostly a mesh structure. The raw water is filtered through the membrane filter only by the pressure of the raw water in the process of flowing along the flow path of the spacer. By forming the shape of the spacer differently from the general mesh structure, efforts for improving the filtration rate of the raw water and lowering the foreign matter adsorption .

Korean Patent Registration No. 10-0980188 discloses an apparatus for filtering and separating a fluidized medium. An apparatus for filtering and separating a fluid medium includes a pressure resistant housing in which a separating membrane is disposed, a fluidized medium to be separated in the pressure resistant housing, And a concentrated liquid discharge port and a permeated liquid discharge port for discharging the concentrated liquid and the permeated liquid from the pressure-resistant housing, respectively.

The separation membrane comprises a plurality of membrane elements in the form of a membrane permeate and a central permeate discharge, accumulation device supported centrally in the pressure-resistant housing. The membrane pillows are radially connected to the central permeate discharge and accumulation device and extend in a spiral pattern around the central permeate discharge, the central permeate discharge from the accumulator, the accumulation device, Each having a permeate discharge opening at an end thereof connected to said permeate discharge and accumulation device, said permeate discharge opening being configured to discharge said permeate from said membrane pillow to remove said permeate from said membrane pillow, To communicate with a corresponding permeate inflow opening in the apparatus.

A space member for guiding the movement of the raw water is disposed between each membrane pillow of the apparatus, so that a channel for movement of raw water is formed between each membrane pillow. This space member has a lattice-like structure as shown in Fig. 3, and in particular, has a structure in which the second elements 231 are connected between the first elements 230. Fig. At this time, the second element 231 is formed to be smaller than the first element 230. This space element 23 is axially aligned with respect to the permeate discharge and accumulation device of the first element 230 so that the fluid medium traversing the first and second multiregional spirals can flow in the axial direction.

However, in the apparatus for filtering and separating the fluidized medium of Patent Publication No. 10-0980188, the first element 230 divides the flow paths through which the raw water flows, so that when foreign matter is adsorbed between the first elements 230, The flow path between the first elements 230 is easily clogged by foreign substances, thereby lowering the filtration performance and causing a rise in the pressure of the remaining flow paths, thereby reducing the service life of the membrane.

(0001) Korean Patent Laid-Open No. 10-2014-0092307 (Disclosure Date: 2014.07.23) (0002) Korean Patent Laid-Open No. 10-2014-0033137 (Publication date: 2014.03.17) (0003) Korean Patent No. 10-0980188 (Published on September 30, 2010)

It is an object of the present invention to provide an open spacer for the formation of a vortex of a membrane filter made to suppress concentration polarization of a membrane and formation of a precipitate to improve the filtration rate of raw water and a membrane filter module using the open spacer.

The above objects are achieved according to the invention by a feed channel spacer disposed between the filter elements in a membrane filter module having a plurality of filter elements laminated around a purified water pipe, And a plurality of connecting bars connecting the column members and forming a channel through which the raw water flows between the filter members, the column members comprising a plurality of main grooves Pillar; And a plurality of auxiliary columns connected to the main column and spaced apart from the filter member to form a first vortex of the raw water between the filter member and the open spacers. .

The auxiliary column may be formed to have a reduced diameter toward the filtration member so that the raw water passing through the auxiliary column forms the first vortex at the filtration member side.

The auxiliary column includes a first auxiliary column and a second auxiliary column, the connection bar forming a gap between the main columns, the first connection bar to which the first auxiliary column is connected; And a second connecting bar swung by the flow energy of the raw water between the main columns and connected to the second auxiliary column, and the first vortex by the second auxiliary column is swung by the flow energy of the raw water between the main columns, Can be made to change continuously.

The second connection bar may be configured to connect the main column and the second auxiliary column in a wave pattern.

Wherein the main column is formed with a plurality of constricted portions along the perimeter thereof so that the constricted portion moves away from the connection apices in the flow direction of the raw water so that the raw water passing through the main column forms a second vortex on the side of the filtration member Lt; / RTI >

This object is achieved, according to the invention, by a membrane filter module comprising an open spacer for the vortex formation.

The membrane filter module includes: a purified water pipe around which a pipe member having a collecting hole is wound; A filtration member wound together with the feed channel spacer on the outer circumferential surface of the pipe member such that a permeable body spacer is disposed between the pair of unit filtration members and integrated with one another and a channel formed by the permeable body spacer is connected to the collecting hole; And the other one closing member having a discharge pipe through which the filtered concentrated liquid is discharged is coupled to the other, and the raw water is supplied to the feed channel Passing through the channel of the spacer, passing through the filtration member, removing the impurities, guided by the passage formed by the permeable body spacer, and introduced into the purified water pipe through the collecting hole.

According to the present invention, by connecting a plurality of auxiliary columns spaced apart from the filtration member and forming the first vortex of raw water between the filtration member and the main column, it is possible to improve the filtration rate of the raw water, It is possible to provide an open spacer for forming a vortex of a membrane filter made to suppress the formation of a precipitate and a membrane filter module using the open spacer.

Figures 1 to 3 show a conventional laminated tubular membrane filter.
Figure 4 shows a membrane filter module comprising an open spacer for the formation of a vortex of the membrane filter of the present invention.
5 is a view showing a purified water pipe, a filtration member, and a feed channel spacer in a membrane filter module including an open spacer for the eddy formation of the membrane filter of FIG.
Figure 6 illustrates a feed channel spacer according to one embodiment of the present invention.
Figure 7 shows a filtration member and a feed channel spacer of a membrane filter module comprising an open spacer for the eddy formation of the membrane filter of Figure 4;
8 is a view showing the main column of the feed channel spacer of Fig.
Fig. 9 is a view showing an auxiliary column of the feed channel spacer of Fig. 6; Fig.
Figure 10 shows vortices formed in the spacer internal channels of a membrane filter module including an open spacer for the eddy formation of the membrane filter of Figure 4;
11 is a view of a feed channel spacer according to another embodiment of the present invention.
12 shows a vortex formed in the spacer inner channel of Fig. 11;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, the well-known functions or constructions are not described in order to simplify the gist of the present invention.

The open spacers for the vortex formation of the membrane filter of the present invention and the membrane filter module using the open spacers are configured to suppress concentration polarization of the membrane and formation of precipitate in order to improve the filtration rate of the raw water.

Figure 4 shows a membrane filter module comprising an open spacer for the formation of an eddy of the membrane filter of the present invention, Figure 5 is a membrane filter module comprising an open spacer for the eddy formation of the membrane filter of Figure 4, Fig. 6 is a view of a feed channel spacer according to one embodiment of the present invention; Fig. 7 is a cross-sectional view of a membrane filter module including an open spacer for vortex formation of the membrane filter of Fig. 6 is a view showing a main column of the feed channel spacer of Fig. 6, Fig. 9 is a view showing an auxiliary column of the feed channel spacer of Fig. 6, and Fig. 10 is a view showing an auxiliary column of the membrane filter of Fig. Spacer inside of membrane filter module with open spacers for vortex formation View showing the vortex formed in the board, Figure 11 is a view showing a feed channel spacer according to another embodiment of the present invention, Figure 12 is a view showing the vortex formed in the spacer within the channel of FIG.

4 and 5, the membrane filter module 1 for vortex formation of the present invention is configured to suppress the concentration polarization in the channel 301 and the formation of precipitates as well as improve the filtration rate of the raw water A purified water pipe 100, a filtering member 200, a spacer 300, and a housing 400.

4, the membrane filter module 1 for forming a vortex is formed by surrounding a hollow purified water pipe 100 installed in a housing 400 with a pipe member 110 having a collection hole 111 Respectively. On the outer circumferential surface of the pipe member 110, the feed channel spacer 300 and the filtration member 200 are wound together in a laminated form.

As shown in FIG. 7, the filter member 200 has the transmitting member spacers 210 disposed between the pair of unit filter members, so that they are integrated into one. One end of the filtration member 200 is coupled to the pipe member 110 and then wound around the outer circumferential surface of the pipe member 110. The flow path formed by the permeable member spacer 210 is connected to the collecting hole 111 of the pipe member 110 ).

As shown in Fig. 5, the feed channel spacers 300 are wound on the pipe member 110 together with the filter member 200 in the form of being disposed between the filter members 200, respectively. Thus, the feed channel spacers 300 are alternately stacked between the filter members 200 in the radial direction of the pipe member.

4, a housing 430 is provided at one side of the housing 400 with a closure member 430 having an inlet pipe 410 through which raw water flows, and a discharge pipe 430 through which the filtered concentrated liquid is discharged is provided at the other side of the housing 400. [ A closure member 430 having an opening 420 is provided. The raw water to be filtered flows into the housing 400 through the inflow pipe 410 in a state where the closing members 430 are respectively coupled to the inside of the housing 400.

The raw water flowing into the inlet pipe 410 flows into the channel 301 in the feed channel spacer 300 provided between the filter members 200 and then moves along the longitudinal direction of the purified water pipe 100. The channel 301 means the inner space of the feed channel spacer 300 through which the raw water flows.

The raw water flows inside the channel (301) to form a contact surface with both filtration members (200). A part of the raw water flowing in the channel 301 is transmitted through the filter member 200 by the pressure of the raw water. The purified water passing through the filtration member 200 and removed from the impurities is guided by the passage formed by the permeable body spacer 210 and is introduced into the purified water pipe 100 through the pipe member 110 and then discharged through the discharge port 101 .

As shown in FIG. 4, the raw water that has not passed through the filtration member 200 flows along the channel 301 and is discharged through the discharge pipe 420.

Hereinafter, the feed channel spacer 300 will be described in detail.

6-10, the feed channel spacer 300 includes a plurality of pillar members 310 interposed between the filter members 200 and a plurality of pillar members 310 connecting the pillar members 310 and between the filter members 200. [ And a connection bar 320 forming a channel 301 through which raw water flows. As shown in FIG. 6, the column members 310 are arranged at regular intervals from each other and connected by the connecting bar 320. 6 and 7, arrows indicate the flow of the raw water.

The column member 310 includes a plurality of main columns 311 forming a gap between the channels 301 and a plurality of auxiliary columns 312 forming a first vortex W1 of raw water between the main column 311 and the filtration member 200. [ .

As shown in FIG. 6, the main column 311 and the auxiliary column 312 are alternately arranged and connected in a lattice form by the connecting bar 320. The main pillar 311 and the main pillar 311 (and the auxiliary pillar 312 and the auxiliary pillar 312) are not directly connected by the connecting bar 320.

7, the main column 311 is formed by contacting the filtration members 200 with both ends thereof in contact with the filtration member 200 (in the radial direction of the pipe member 110) ).

The auxiliary pillars 312 are spaced apart from the two filtration members 200 in a state where the auxiliary pillars 312 are connected to the main pillars 311 by the connection bars 320.

The raw water spacer used in the conventional membrane filter is for forming the passage through which the raw water moves, and has mostly a mesh structure. The raw water is filtered through the membrane filter only by the pressure of the raw water in the process of flowing along the flow path of the spacer. By forming the shape of the spacer differently from the general mesh structure as in the patent document 10-0980188, the filtration rate of the raw water is improved Efforts are being made to lower the adsorption of foreign substances on the spacer.

However, in the apparatus for filtering and separating the fluidized medium of Patent Publication No. 10-0980188, as shown in FIG. 3, the first element 230 separates the flow paths through which the raw water flows, The flow path between the first elements 230 is easily clogged with a small amount of foreign matter to lower the filtration performance and increase the pressure of the remaining flow paths to reduce the service life of the membrane.

In addition, the apparatus for filtering and separating the fluidized medium of Patent Publication No. 10-0980188 does not lower the foreign matter adsorption rate inside the channel.

The feed channel spacer 300 of the present invention is formed by forming a vortex of raw water on the side of the filtration member 200 in accordance with the morphological characteristics of the main column 311 and the auxiliary column 312 to form concentration polarization of the membrane and formation of precipitate Thereby improving the filtration rate of the raw water and overcoming the limitations of the prior art described above.

9 and 10, the auxiliary column 312 has a diameter (toward both sides of the pipe member 110 in the radial direction of the pipe member 110, relative to the point where the connection bar 320 is coupled) toward the filter member 200 .

The raw water flowing around the auxiliary column 312 flows toward the filter member 200 toward the flow direction as flowing along the surface of the auxiliary column 312 as shown in FIG. The first vortex W1 is formed at a point adjacent to the filtration member 200. [

As shown in FIGS. 8 and 10, a plurality of constricted portions 311a are formed in the main column 311 along the periphery. At least one of the constricted portions 311a is formed on both sides of the point where the connecting bar 320 is joined (radial direction of the pipe member 110). Hereinafter, the bulged portion between the constricted portion 311a and the constricted portion 311a is referred to as a bulging portion 311b.

The constricted portion 311a is formed so as to be away from the connecting bar 320 in the flow direction of the raw water. The raw water flowing around the main column 311 flows toward the filter member 200 toward the flow direction as it flows along the surfaces of the constricted portions 311a and the bulged portions 311b as shown in Fig. , The raw water passing through the main column 311 forms a second vortex W2 at a point adjacent to the filtration member 200. [

The first vortex W1 and the second vortex W2 are formed in the vicinity of both the filtration members 200 at the positions where the main column 311 and the auxiliary column 312 are disposed, The surface of the filtration member 200 is affected by the uniform first vortex W1 and the second vortex W2 so that the first vortex W1 and the second vortex W2 are formed on the surface of the filtration member 200, The flow energy of the gas is continuously operated.

Therefore, the flow energy of the first vortex W1 and the second vortex W2 reduces the rate at which foreign matter is adsorbed on the surface of the filtration member 200, and the concentration polarization phenomenon is also significantly reduced. The foreign matter adsorbed on the surface of the filtration member 200 can also be removed from the surface by the flow energy of the first vortex W1 and the second vortex W2.

In addition, when the feed channel spacer 300 of the present invention is disposed between the filtration members 200, while the raw water in the conventional membrane filter is filtered through the membrane filter only by the pressure of the raw water in the process of flowing along the flow path of the spacer, The first vortex W1 and the second vortex W2 act more on the surface of the filtration member 200 than the pressure of the raw water. The pressure of the vortex W2 acts on the surface of the filtration member 200, thereby improving the filtration rate of the raw water.

11 and 12, an open spacer 300 for forming a vortex flow of a membrane filter according to another embodiment of the present invention includes a connection bar 320, 1 connection bar 321 and a second connection bar 322 whose position changes in the channel 301. [

The auxiliary column 312 includes a first auxiliary column 312A and a second auxiliary column 312B. The first auxiliary column 312A is connected to the first connection bar 321 to be fixed in the channel 301 and the second auxiliary column 312B is connected to the second connection bar 322, ). The first auxiliary column 312A and the second auxiliary column 312B are formed in the same shape.

The first connection bar 321 is substantially the same as the connection bar 320 shown in FIG. 10, and is not deformed by the flow energy of the raw water, thereby forming a gap between the main columns 311.

The second connecting bar 322 swings by the flow energy of the raw water between the main columns 311 and connects the main column 311 and the second auxiliary column 312B in a wave pattern. The second connection bar 322 swings while being elastically deformed by the flow energy of the raw water between the main column 311 and the second auxiliary column 312B so that the second auxiliary column 312B is connected to the second connection bar 322, the gap between the filter members 200 is continuously changed.

The second connection bar 322 may have a smaller cross-sectional area than the first connection bar 321 or may be made of a soft material rather than the first connection bar 321 and may be elastically deformed easily by the flow energy of the raw water. Since the second connecting bar 322 is formed in a wavy pattern, the second connecting bar 322 is longer than the first connecting bar 321 formed in a straight line shape, and is further influenced by flow energy of the raw water.

When the second auxiliary column 312B swings and the interval between the second auxiliary column 312B and the first and second filtration members 200 continuously changes, the first vortex W1 by the second auxiliary column 312B swings the second connection bar 322 And consequently the pressure of the first vortex W1 acting on the surfaces of both filtration members 200 is continuously changed by the second auxiliary column 312B.

The constant change in the pressure of the first vortex W1 acting on the surfaces of both filtration members 200 due to the oscillation of the second auxiliary column 312B means that the first vortex W1 acting on the surface of the filtration member 200 (The pressure of the first vortex W1 acting on the surface of both filtration members 200 by the fixed first auxiliary column 312A) The maximum pressure of the first vortex W1 acting on the surface of the filtration member 200 due to the oscillation of the second auxiliary column 312B is formed to be larger than the ratio of the amount of foreign matter adsorbed to the surface of the filtration member 200 There is an advantage of further reduction.

According to the present invention, a plurality of auxiliary columns, which are spaced apart from the filtration member and form a first vortex of raw water, are directly connected to the main column to enhance the filtration rate of raw water, It is possible to provide an open spacer for the formation of a vortex of a membrane filter made to suppress the membrane filter module using the same.

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, but, on the contrary, It is obvious to those who have. Accordingly, it should be understood that such modifications or alterations should not be understood individually from the technical spirit and viewpoint of the present invention, and that modified embodiments fall within the scope of the claims of the present invention.

1: Membrane filter module
100: purified water pipe 200: filtration member
110: pipe member 210: permeable body spacer
111: collecting hole 400: housing
101: outlet 410: inlet pipe
300: Feed channel spacer 420:
301: channel 430: closing member
310:
311: Main column
311a:
311b: bulging
312: auxiliary column
312A: first auxiliary column
312B: Second auxiliary column
W1: 1st vortex
W2: second vortex
320: Connection bar
321: First connection bar
322: Second connection bar

Claims (7)

A feed channel spacer disposed between the filtration members in a membrane filter module having a plurality of filtration members stacked around a purified water pipe,
A plurality of pillar members interposed between the filtration members and a plurality of connection bars connecting the pillar members and forming channels through which raw water flows between the filtration members,
The column member having a plurality of main columns contacting the filter member to form an interval of the channels; And a plurality of auxiliary columns connected to the main column and spaced apart from the filtration member to form a first vortex of the raw water between the filtration member,
Wherein the auxiliary column includes a first auxiliary column and a second auxiliary column,
The connecting bar may include a first connecting bar connecting the first auxiliary columns to form a gap between the main columns; And a second connecting bar swung by the flow energy of the raw water between the main columns and connected with the second auxiliary columns,
Wherein the first vortex by the second auxiliary column continuously changes by the oscillation of the second connecting bar. The method according to claim 1,
And the auxiliary column is reduced in diameter toward the filter member so that the raw water passing through the auxiliary column forms the first vortex at the filter member side. delete The method according to claim 1,
And the second connecting bar connects the main pole and the second auxiliary pole in a wavy pattern. The method according to claim 1,
Wherein the main pillar is formed with a plurality of constricted portions along the periphery thereof,
Wherein the constriction moves away from the connecting bar in the flow direction of the raw water so that the raw water passing through the main column forms a second vortex at the side of the filtration member. A membrane filter module comprising a feed channel spacer according to any one of claims 1, 2, 4 and 5. The method according to claim 6,
The membrane filter module comprises:
A purified water pipe around which a pipe member having a collecting hole is wrapped;
A filtration member wound together with the feed channel spacer on the outer circumferential surface of the pipe member such that a permeable body spacer is disposed between the pair of unit filtration members and integrated with one another and a channel formed by the permeable body spacer is connected to the collecting hole; And
Wherein one closing member having an inlet pipe through which raw water flows is coupled to one side and another closing member having a discharge pipe through which the filtered concentrated liquid is discharged is coupled to the other side,
Wherein the raw water flows through the channel of the feed channel spacer, passes through the filter member, is removed from impurities, is guided by the passage formed by the permeable body spacer, and flows into the purified water pipe through the collecting hole. .

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