KR102442851B1 - Water-treatment filter module - Google Patents

Abstract

The present invention relates to a water treatment filter module, and according to one aspect of the present invention, a membrane for filtering raw water; and a spacer laminated to the membrane and providing a plurality of passageways for passing raw water through the membrane, the spacer comprising: a first member extending in a first direction; and a second member extending in a second direction different from the first direction and disposed to intersect the first member to form a spacer cell, wherein at least one of the first member and the second member is centered in the extending direction. , a spirally wound water treatment filter module having a predetermined pitch of a predetermined radius is provided.

Description

Water-treatment filter module

The present invention relates to a water treatment filter module.

A water treatment filter module is a device that removes impurities from raw water.

Recently, water treatment technology has become important due to environmental pollution, etc. In particular, a membrane water treatment module using reverse osmosis can be used to purify raw water by removing polymers, colloids, and particles (particles).

The process of moving a high-concentration solution to a low-concentration side using pressure is called 'reverse osmosis', and a device that purifies water by passing only water molecules through a semi-permeable membrane using this principle is called a reverse osmosis membrane water treatment module. In this case, the semi-permeable membrane is a 'reverse osmosis membrane filter', and a reverse osmosis membrane filter module is a modularized filter.

This reverse osmosis membrane filter module is a spiral-wound membrane module (spiral-wound module) is used.

The spiral wound membrane module has a structure in which membranes and spacers are alternately stacked. The membrane functions to filter out impurities.

1 is a plan view of a conventional spacer 10, and FIG. 2 is an analysis result showing a representative flow in the spacer 10 shown in FIG.

Referring to FIG. 1 , the spacer 10 forms a passage through which raw water flows into the membrane. For example, the spacer 10 has a mesh-like structure. Specifically, the spacer 10 includes a plurality of strands 11 cross-arranged to form a spacer cell 12 through which raw water can pass.

Meanwhile, as in FIG. 2 , when raw water is introduced, a differential pressure is generated due to flow obstruction by the spacer, which increases energy cost.

In particular, referring to FIG. 2 , the volume increases at the contact point where the plurality of strands 11 intersect, and a vortex occurs in the corresponding area. These vortices increase the pressure loss.

In addition, the concentration polarization phenomenon inevitably occurs near the membrane by the water permeation flux, and as this phenomenon is severe, the osmotic pressure increases near the membrane and the water permeability decreases.

Therefore, it is required to design a spacer capable of generating a small differential pressure and mitigating the concentration polarization phenomenon.

An object of the present invention is to provide a water treatment filter module capable of generating a small differential pressure and alleviating concentration polarization.

In order to solve the above problems, according to an aspect of the present invention, a membrane for filtering raw water; and a spacer laminated to the membrane and providing a plurality of passageways for passing raw water through the membrane, the spacer comprising: a first member extending in a first direction; and a second member extending in a second direction different from the first direction and disposed to intersect the first member to form a spacer cell, wherein at least one of the first member and the second member is centered in the extending direction. , a spirally wound water treatment filter module having a predetermined pitch of a predetermined radius is provided.

As described above, the water treatment filter module related to at least one embodiment of the present invention has the following effects.

By configuring the strands constituting the spacer with helical strands having a predetermined radius and pitch, it is possible to induce flow to the membrane surface, to remove contact points at the intersection area to prevent vortex generation, and to minimize pressure loss.

1 is a plan view of a conventional spacer.
FIG. 2 is an analysis result showing a representative flow in the spacer shown in FIG. 1 .
3 and 4 are views showing spacers constituting a water treatment filter module related to an embodiment of the present invention.
5 shows an analysis result using the spacer shown in FIG. 4 .
6 is a schematic diagram for explaining an apparatus and method for manufacturing a helical strand for a water treatment filter module according to an embodiment of the present invention.

Hereinafter, a water treatment filter module according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In addition, regardless of the reference numerals, the same or corresponding components are given the same or similar reference numbers, and overlapping descriptions thereof will be omitted, and the size and shape of each component shown for convenience of description is exaggerated or reduced. can be

3 and 4 are views showing a spacer 100 constituting a water treatment filter module related to an embodiment of the present invention, and FIG. 5 shows an analysis result using the spacer 100 shown in FIG.

A water treatment filter module related to an embodiment of the present invention is laminated on the membrane and the membrane for filtering raw water, and a spacer 100 that provides a plurality of passages (also referred to as 'spacer cells') for passing raw water through the membrane. include

The membrane may be formed of various materials capable of reverse osmosis.

The spacers 100 are disposed to form a spacer cell 130 by crossing the first member 110 extending in a first direction and extending in a second direction different from the first direction, and intersecting the first member 110 . and a second member 120 .

The first member 110 and the second member 120 are each the aforementioned strand, and may each be formed of a resin material, and in particular, may be formed of the same resin material, for example, polyethylene (PE). ) resin, polypropylene (PP) resin, or a combination thereof. In addition, the first member 110 and the second member 120 may have an approximately circular (or elliptical) cross-section and may have a diameter of 50 μm to 200 μm.

At least one member of the first member 110 and the second member 120 is spirally wound with a predetermined pitch p of a predetermined radius around the extending direction (central axis A). That is, at least one of the first member 110 and the second member 120 is a helical strand wound helically with respect to the central axis (A).

In addition, each of the first member 110 and the second member 120 has a helical shape wound at a predetermined pitch with a predetermined radius around the extending direction (central axis).

In addition, the first member 110 and the second member 120 may be helical strands wound along the same rotational direction with respect to the central axis (A). Alternatively, the first member 110 and the second member 120 may be helical strands wound along different rotational directions.

Also, the first member 110 and the second member 120 may have the same radius and the same pitch.

The pitch p may be 1800 μm to 3000 μm. When the pitch (p) has a value smaller than the numerical range, the cost increases excessively. On the other hand, when the pitch (p) has a value greater than the numerical range, the flow path reduction during packing may be severe.

In addition, the radius may be 100 μm to 500 μm. When the radius has a value smaller than the numerical range, the pressure loss is excessively high, and when the radius has a value greater than the numerical range, the radius of the water treatment filter module becomes too large, and the efficiency is reduced.

On the other hand, the first member 110 and the second member 120 may be cross-arranged without a contact point in the cross region (C). Due to the helical shape of the first and second members 110 and 120 of the spacers 100 , the spacer cells 130 can be maintained only in a cross-arranged state without separate bonding in the cross region.

Also, the first member 110 and the second member 120 may be cross-arranged so that the spacer cell 130 has a substantially diamond shape.

Referring to FIG. 5 , it can be seen that the vertical flow occurs without a vortex in the intersection region.

Example

The differential pressure was analyzed through the spacer as in FIG. 1 and the spacer as in FIG. 4 .

In the spacer of FIG. 1 , the distance between the strands is 2750 μm, and in the spacer of FIG. 4 , the pitch of the helical strands is 2750 μm. At this time, the differential pressure in the spacer of FIG. 1 was about 1032 Pa, and the differential pressure in the spacer of FIG. 4 was interpreted as 665 Pa.

6 is a schematic diagram illustrating an apparatus 200 and a manufacturing method of a helical strand for a water treatment filter module related to an embodiment of the present invention.

6, the apparatus 200 for manufacturing a helical strand of the water treatment filter module related to the first embodiment includes an extrusion nozzle 210, a rotating roll 220 on which the strand extruded from the extrusion nozzle 210 is wound, In order to adjust the pitch (p) of the helical strand wound on the first driving unit 240 and the rotating roll 220 for axial movement and rotation of the rotating roll 220, the rotational speed (w) of the rotating roll 220 and a control unit 250 for adjusting the axial movement speed v.

According to the first embodiment, a strand is extruded from the extrusion nozzle 210 , and the extruded strand is spirally wound around a rotating roll 220 , thereby producing a helical strand. At this time, the first driving unit 230 rotates the rotating roll 220 and, at the same time, performs an axial movement of the rotating roll 220, thereby adjusting the pitch (p) of the helical strand wound on the rotating roll 220 . .

Unlike this, the apparatus 200 for manufacturing a helical strand of a water treatment filter module related to the second embodiment of the present invention includes an extrusion nozzle 210, a rotating roll 220 on which the strand extruded from the extrusion nozzle 210 is wound, A second driving unit for rotating the rotating roll 220, a third driving unit 240 for moving the extrusion nozzle 110 along the axial direction of the rotating roll 220, and adjusting the pitch of the helical strands wound on the rotating roll In order to do this, it includes a control unit 250 for controlling the rotational speed of the rotary roll 220 and the axial movement speed of the extrusion nozzle 210 . In the present embodiment, the second driving unit is provided to drive only the rotation of the rotating roll 220, unlike the first driving unit 230 of the first embodiment.

According to the second embodiment, the strands are extruded from the extrusion nozzle 210 , and the extruded strands are spirally wound around the rotating roll 220 , so that the helical strands are manufactured. At this time, the second driving unit is provided to rotate the rotating roll, and the third driving unit 240 moves the extrusion nozzle 210 along the axial direction of the rotating roll 220 , so that the helical strand wound on the rotating roll 220 . is provided to adjust the pitch of

That is, in the first embodiment, the object to be moved in the axial direction is the rotary roll 220 , and in the second embodiment, the object to be moved in the axial direction is the extrusion nozzle 210 .

A manufacturing method using the manufacturing apparatus 200 having the above structure is a method of manufacturing a helical strand of a water treatment filter module, comprising: extruding the strand through an extrusion nozzle; And at the same time as rotating the rotating roll 220, by moving at least one of the rotating roll 220 and the extrusion nozzle 210 along the axial direction of the rotating roll, spirally winding the strand around the rotating roll 220 to form the helical strand. forming a step.

At this time, in the step of forming the helical strand, in order to adjust the pitch (p) of the helical strand, the step of adjusting the rotational speed (w) and the axial movement speed (v) of the rotating roll 220 may be further included can

In addition, the method for manufacturing a spacer for a water treatment filter module using a helical strand includes the steps of extruding the strand through an extrusion nozzle, rotating the rotating roll, and simultaneously rotating at least one of the rotating roll and the extrusion nozzle along the axial direction of the rotating roll spirally winding the strands on a rotating roll by moving them to form helical strands, and manufacturing a spacer by cross-arranging a plurality of helical strands without contact points.

The preferred embodiments of the present invention described above are disclosed for the purpose of illustration, and various modifications, changes, and additions are possible within the spirit and scope of the present invention by those skilled in the art having ordinary knowledge of the present invention. and additions shall be deemed to fall within the scope of the following claims.

100: spacer
110: first member
120: second member
130: spacer cell

Claims (9)

a membrane for filtering raw water; and
a spacer laminated to the membrane and providing a plurality of passageways for passing raw water through the membrane;
The spacer may include a first member extending in a first direction; and
a second member extending in a second direction different from the first direction and disposed to intersect the first member to form a spacer cell;
At least one of the first member and the second member has a helical shape wound at a predetermined pitch with a predetermined radius around the extending direction,
A water treatment filter module, wherein the first member and the second member are cross-arranged without contact. delete The method of claim 1,
A water treatment filter module in which the first member and the second member are wound along the same rotational direction. The method of claim 1,
A water treatment filter module in which the first member and the second member are wound along different rotational directions. The method of claim 1,
A water treatment filter module in which the first member and the second member have the same radius and the same pitch. 6. The method of claim 5,
The pitch is a water treatment filter module of 1800㎛ to 3000㎛. 6. The method of claim 5,
The radius is 100㎛ to 500㎛ water treatment filter module. delete The method of claim 1,
A water treatment filter module in which the first member and the second member are cross-arranged so that the spacer cells have a diamond shape.

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