KR20190050367A - Water-treatment filter module - Google Patents

Abstract

The present invention relates to a water treatment filter module. According to an aspect of the present invention, provided is a water treatment filter module comprises: a membrane for filtering raw water; and a spacer stacked on the membrane and providing a plurality of paths for passing the raw water to the membrane. The spacer comprises: a first member extending in a first direction; and a second member extending in a second direction different from the first direction and arranged to intersect the first member to form a spacer cell. Provided is a spirally wound water treatment filter module having a predetermined pitch of a predetermined radius with respect to a direction in which at least one of the first member and the second member is extended.

Description

Water-treatment filter module

The present invention relates to a water treatment filter module.

The water treatment filter module is a device for removing impurities from raw water.

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

Reverse osmosis is a process in which a high concentration solution is moved to a lower concentration by using pressure. The reverse osmosis membrane water treatment module is a device for purifying water by passing only water molecules through a semi-permeable membrane using this principle. At this time, the semipermeable membrane is a reverse osmosis membrane filter, and the module is a reverse osmosis membrane filter module.

Such a reverse osmosis membrane filter module uses a spiral-wound module.

The spiral separation membrane module has a structure in which a membrane and a spacer are alternately stacked. The membrane performs the function of filtering the impurities.

FIG. 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 net-like net structure. Specifically, the spacers 10 include a plurality of strands 11 arranged in a crossed fashion to form spacer cells 12 through which the raw water can pass.

On the other hand, as shown in FIG. 2, when the raw water is introduced, a differential pressure is generated due to flow disturbance by the spacer, which increases the energy cost.

In particular, referring to FIG. 2, the volume at the contact point where the plurality of strands 11 intersect increases, and a swirling occurs in the corresponding region. Such a swirling phenomenon increases the pressure loss.

In addition, concentration polarization occurs near the membrane necessarily due to the permeation flux. As the phenomenon becomes more severe, osmotic pressure increases near the membrane and the water permeability drops.

Therefore, it is required to design a spacer which can reduce the differential pressure and mitigate concentration polarization phenomenon.

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

According to an aspect of the present invention, there is provided a membrane filtration apparatus 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 arranged to intersect the first member to form a spacer cell, wherein at least one of the first member and the second member 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 according to at least one embodiment of the present invention has the following effects.

By constituting the strands constituting the spacer with helical strands having a predetermined radius and pitch, it is possible to guide the flow to the surface of the membrane and to remove the contact points in the crossing region to prevent the occurrence of vortices and to minimize the pressure loss.

1 is a plan view of a conventional spacer.
Fig. 2 is a result of analysis showing a representative flow in the spacer shown in Fig.
3 and 4 are views showing a spacer constituting a water treatment filter module according to an embodiment of the present invention.
5 shows an analysis result using the spacer shown in Fig.
6 is a schematic view for explaining an apparatus for manufacturing a helical strand for a water treatment filter module and a manufacturing method thereof 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, the same or corresponding reference numerals are given to the same or corresponding reference numerals regardless of the reference numerals, and redundant description thereof will be omitted. For convenience of explanation, the size and shape of each constituent member shown in the drawings are exaggerated or reduced .

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

The water treatment filter module associated with one embodiment of the present invention includes a membrane 100 for filtering raw water and a spacer 100 stacked on the membrane and providing a plurality of passageways (also referred to as "spacer cells") for passing raw water through the membrane .

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

The spacer 100 includes a first member 110 extending in a first direction and a second member 110 extending in a second direction different from the first direction and disposed to intersect the first member 110 to form a spacer cell 130 And a second member (120).

Each of the first member 110 and the second member 120 is a strand described above and may be formed of a resin material and may be formed of the same resin material and may be made of polyethylene ) Resin, a polypropylene (PP) resin, or a combination thereof. In addition, the first member 110 and the second member 120 have a substantially circular (or elliptical) cross section, and may have a diameter of 50 탆 to 200 탆.

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

The first member 110 and the second member 120 each have a helical shape that is wound around the extended direction (central axis) at a predetermined pitch of a predetermined radius.

The first member 110 and the second member 120 may be helical strands wound around the center axis A along the same rotation direction. Alternatively, the first member 110 and the second member 120 may be helical strands wound along different rotational directions.

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

The pitch p may be between 1800 μm and 3000 μm. If the pitch p has a value smaller than the numerical value range, the cost is excessively increased. Otherwise, if the pitch p has a value larger than the numerical value range, the reduction in the flow rate during packing can be increased.

In addition, the radius may be from 100 탆 to 500 탆. If the radius has a value smaller than the numerical value range, the pressure loss becomes excessively high, and if the radius is larger than the numerical value range, the radius of the water treatment filter module becomes excessively large and the efficiency decreases.

On the other hand, the first member 110 and the second member 120 may be arranged in an intersecting region C without a contact point. The spacers 100 can be held by the helical shape of the first and second members 110 and 120 only in a state in which the spacer cells 130 are arranged in an intersecting manner without any additional joining.

Also, the first member 110 and the second member 120 may be arranged so that the spacer cells 130 have a substantially diamond shape.

Referring to FIG. 5, it can be seen that upward and downward flows occur without swirls in the crossing region.

Example

The differential pressure was analyzed through the spacer as shown in Fig. 1 and the spacer as shown in Fig.

In the spacer of Fig. 1, the distance between the strands is 2750 mu m, and in the spacer of Fig. 4, the pitch of the helical strands is 2750 mu m. 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 view for explaining an apparatus 200 for manufacturing a helical strand for a water treatment filter module and a manufacturing method thereof according to an embodiment of the present invention.

6, the apparatus 200 for manufacturing a helical strand of the water treatment filter module according to the first embodiment includes an extrusion nozzle 210, a rotary roll 220 wound with a strand extruded from the extrusion nozzle 210, The rotational speed w of the rotating roll 220 is adjusted to adjust the pitch p of the reduced helical strand in the first driving part 240 and the rotating roll 220 for axial movement and rotation of the rotating roll 220. [ And a control unit 250 for adjusting the axial movement speed v.

According to the first embodiment, the strand is extruded from the extrusion nozzle 210, and the extruded strand is spirally wound on the rotary roll 220, thereby being made into a helical strand. At this time, the first driving unit 230 adjusts the pitch p of the reducing helical strands in the rotary roll 220 by rotating the rotary roll 220 and performing the axial movement of the rotary roll 220 .

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

According to the second embodiment, the strand is extruded from the extrusion nozzle 210, and the extruded strand is spirally wound on the rotating roll 220 to be made into a helical strand. The third driving unit 240 moves the extrusion nozzle 210 along the axial direction of the rotating roll 220 to rotate the rotating roll 220 in a direction parallel to the rotational direction of the rotating roll 220. The second driving unit rotates the rotating roll, As shown in FIG.

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 method of manufacturing a helical strand of a water treatment filter module, comprising the steps of: extruding a strand through an extrusion nozzle; And at least one of the rotary roll 220 and the extrusion nozzle 210 is moved along the axial direction of the rotary roll so that the strand is spirally wound on the rotary roll 220 to form the helical strand .

At this time, in order to adjust the pitch p of the helical strands, the step of forming the helical strand further includes the step of adjusting the rotational speed w and the axial moving speed v of the rotating roll 220 .

A method for manufacturing a spacer for a water treatment filter module using a helical strand includes the steps of extruding a strand through an extrusion nozzle, rotating the rotating roll, and rotating at least one of the rotating roll and the extrusion nozzle along the axial direction of the rotating roll Forming a helical strand by spirally winding the strand on a rotating roll by movement of the helical strand, and fabricating the spacer by crossing the plurality of helical strands without a contact.

The foregoing description of the preferred embodiments of the present invention has been presented for purposes of illustration and various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention, And additions should be considered as falling 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 the raw water through the membrane,
The spacer includes: a first member extending in a first direction; And
And a second member extending in a second direction different from the first direction and arranged to intersect the first member and form a spacer cell,
Wherein at least one of the first and second members is spirally wound around the elongated direction with a predetermined pitch of a predetermined radius. The method according to claim 1,
Wherein the first member and the second member each have a helical shape wound at a predetermined pitch of a predetermined radius around an extended direction. 3. The method of claim 2,
Wherein the first member and the second member are wound along the same rotational direction. 3. The method of claim 2,
Wherein the first member and the second member are wound along different rotational directions. 3. The method of claim 2,
Wherein the first member and the second member have the same radius and the same pitch. 6. The method of claim 5,
Wherein the pitch is 1800 탆 to 3000 탆. 6. The method of claim 5,
Wherein the radius is 100 [mu] m to 500 [mu] m. 3. The method of claim 2,
Wherein the first member and the second member are arranged in an intersecting manner without a contact. 9. The method of claim 8,
Wherein the first and second members are arranged so that the spacer cells have a diamond shape.

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