KR20210062923A - Hollow fiber membrane potting jig and method for potting hollow fiber membrane using the same - Google Patents

Abstract

Disclosed are a hollow fiber membrane potting jig and a hollow fiber membrane potting method using the same, wherein the hollow fiber membrane potting jig includes: an internal jig including a first potting solution outlet, at least one column-shaped secondary potting solution outlet, and at least one secondary potting solution flow path; and an external jig that is coupled to the internal jig and includes a first potting solution inlet communicating with the first potting solution outlet, and a secondary potting solution inlet communicating with the secondary potting solution outlet and the secondary potting solution flow path.

Description

Hollow fiber membrane potting jig and hollow fiber membrane potting method using the same {HOLLOW FIBER MEMBRANE POTTING JIG AND METHOD FOR POTTING HOLLOW FIBER MEMBRANE USING THE SAME}

A jig for potting a hollow fiber membrane, and a hollow fiber membrane potting method using the same. More particularly, it relates to a hollow fiber membrane potting jig capable of potting a hollow fiber membrane more simply and effectively by designing the potting jig in a double layer, and a hollow fiber membrane potting method using the same.

In general, as demands such as energy saving, space saving, power saving, and water quality improvement increase, a membrane filtration method for filtering water by a separation membrane has been developed, and is currently being widely used in various fields.

Separation membrane technology is a high-level separation technology to almost completely separate and remove the treatment target material present in the treated water according to the membrane pore size, pore distribution, and membrane surface charge. In the water treatment field, production of high-quality drinking water and industrial water, The scope of application is expanding, such as wastewater treatment and reuse, and clean production processes related to the development of a zero-discharge system.

A hollow fiber membrane has the advantage of securing a large membrane area per unit volume, and thus has been applied to various fluid treatment fields such as chemical purification, sterilization filtration and purification.

There are external pressure type, internal pressure type, immersion type, etc. water treatment module using hollow fiber membrane. Among them, the external pressure type or internal pressure type hollow fiber membrane module inserts a hollow fiber membrane into a cylindrical case and seals both ends or one end with resin. This process is called potting and is cut to form a flow path to form a hollow fiber membrane module. manufacture

In general, in order to manufacture a hollow fiber membrane module, it is necessary to prepare a bundle of hollow fiber membranes in the quantity required for the module, and first, a process of blocking the end of the hollow fiber membrane from the outside is required. This is because, without this process, a flow path is not formed when the potting liquid used as an adhesive in the potting process penetrates from the end of the hollow fiber membrane to the inside and cuts the potting part to obtain a finished product. After that, the hollow fiber membrane bundle that has blocked the end of the hollow fiber membrane is put into the module case, fixed using an appropriate potting cap, and potting liquid is injected to bond and fix the hollow fiber membrane and the case. The cap is removed, and the unnecessary part of the potting part is cut and removed with a cutter to form a flow path and the hollow fiber membrane module is completed.

Conventionally, a method of immersing the end of the hollow fiber membrane in melted wax or applying gypsum mixed with water to the end of the hollow fiber membrane was used, and then potting and cutting was used. In this case, in order to evenly fill the inside of the membrane with wax, gypsum, etc., the hollow fiber membrane A lot of manual work was required, such as manually aligning the ends and removing excess wax and plaster from the outer wall of the hollow fiber membrane.

Similarly, there is a method of filling the ends of the hollow fiber membrane with powder, then applying heat to melt the membrane, then potting and cutting the membrane, but the disadvantages such as alignment and manual operation of the hollow fiber membrane exist as they are.

As a method to reduce manual labor, there is a method of aligning the hollow fiber membrane, blocking the end of the hollow fiber membrane through primary potting, and then injecting the secondary potting solution through another inlet to fix the hollow fiber membrane to the housing, but since a single jig is used, There was no way to check whether the first potting was successful or not, and it was difficult to evenly inject the second potting solution.

It is an object of the present invention to provide a hollow fiber membrane potting jig capable of potting the hollow fiber membrane more simply and effectively.

Another object of the present invention is to provide a method for potting a hollow fiber membrane using the aforementioned potting jig.

1. According to one aspect, a hollow fiber membrane potting jig is disclosed. The jig may include: an internal jig including a first potting solution outlet, at least one secondary potting solution outlet in a column form, and at least one secondary potting solution flow path; and an external jig coupled to the inner jig and including a primary potting liquid inlet communicating with the primary potting liquid outlet, and a secondary potting liquid inlet communicating with the secondary potting liquid outlet and the secondary potting liquid flow path. It may include.

2. In 1 above, the column height of the secondary potting liquid outlet may be higher than the height of the outer wall of the inner jig.

3. In 1 or 2 above, the external jig may further include a housing fastening means.

4. In any one of 1 to 3, a diffuser may be further provided on the primary potting liquid outlet.

5. According to another aspect, a hollow fiber membrane potting method using the hollow fiber membrane potting jig of any one of 1 to 4 is disclosed. The method includes mounting a potting jig to the housing into which the hollow fiber membrane bundle is inserted; injecting the first potting solution into the first potting solution inlet, discharging it through the first potting solution outlet through the internal jig, curing it, and closing the end of the hollow fiber membrane bundle; and injecting the secondary potting solution into the secondary potting fluid inlet, discharging it to the potting jig and the housing through the secondary potting fluid outlet and the secondary potting fluid flow path, and curing the hollow fiber membrane bundle to the housing; It may include steps.

6. In 5 above, the method may further include cutting between the cured primary potting solution and the secondary potting solution to open the end of the hollow fiber membrane bundle.

The present invention has the effect of providing a hollow fiber membrane potting jig capable of potting a hollow fiber membrane more simply and effectively by designing the potting jig in a double layer, and a hollow fiber membrane potting method using the same.

1 is a schematic diagram of a hollow fiber membrane potting apparatus according to an embodiment of the present invention.
FIG. 2 is an exploded view of the hollow fiber membrane potting apparatus of FIG. 1 .
Figure 3 schematically shows a hollow fiber membrane potting method according to an embodiment of the present invention.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings. However, the following drawings are only provided to help the understanding of the present invention, and the present invention is not limited by the following drawings. In addition, since the shape, size, ratio, angle, number, etc. disclosed in the drawings are exemplary, the present invention is not limited to the illustrated matters.

The same reference numerals refer to the same elements throughout the specification. In addition, in describing the present invention, when it is determined that a detailed description of related known technologies may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

When'include','have', and'consist of' mentioned in the present specification are used, other parts may be added unless'only' is used. In the case of expressing the constituent elements in the singular, it includes the case of including the plural unless specifically stated otherwise.

In interpreting the constituent elements, it is interpreted as including an error range even if there is no explicit description.

When the positional relationship of two parts is described as 'on', 'on', 'on', 'next to', etc., unless 'directly' or 'directly' is used, between the two parts One or more other portions may be located.

Positional relationships such as 'upper', 'upper surface', 'lower', and 'lower surface' are only described based on the drawings, and do not represent absolute positional relationships. That is, the positions of 'upper' and 'lower' or 'upper surface' and 'lower surface' may be changed according to the observed position.

According to one aspect, a jig for potting a hollow fiber membrane is provided.

1 is a schematic diagram of a jig for potting a hollow fiber membrane according to an embodiment of the present invention, and FIG. 2 is an exploded view of FIG. 1 .

1 and 2, the hollow fiber membrane potting jig 100 according to an embodiment of the present invention includes a primary potting liquid outlet 11, one or more secondary potting liquid outlets 12 in the form of a column, and an inner jig 10 including one or more secondary potting fluid passages 13; and the primary potting liquid inlet 21 coupled with the internal jig 10 and communicating with the primary potting liquid outlet 11, and the secondary potting liquid outlet 12 and the secondary potting liquid flow path 13 communicating with each other It may include; an external jig 20 including the secondary potting liquid inlet 22 to be used.

The primary potting liquid outlet 11 may serve to discharge the primary potting liquid to the internal jig 10 . In this case, the shape, number, etc. of the primary potting liquid outlet 11 are not particularly limited, and may be appropriately selected within a range that does not impair the effects of the present invention.

According to one embodiment, a diffuser 30 may be additionally provided on the primary potting liquid outlet 11 . In this case, the primary potting liquid discharged through the primary potting liquid outlet 11 may be discharged to the internal jig 10 through the diffuser 30 . When the first potting solution is discharged through the diffuser 30 , the flow of the first potting solution may be reduced, and the first potting solution may be uniformly discharged between the hollow fiber membranes.

One or more (for example, a plurality) of the secondary potting liquid outlet 12 and the secondary potting liquid flow path 13 may each exist, and the secondary potting liquid is evenly distributed to the jig 100 and the housing and discharged. can play a role In particular, since the secondary potting liquid outlet 12 has a column shape, the hollow fiber membranes can be evenly aligned between the columns, and as a result, it is possible to prevent the membrane from being tilted to one side. Meanwhile, the shape of the secondary potting fluid flow path 13 is not particularly limited, and may have, for example, a slit shape or a hole shape.

Although the six secondary potting liquid outlets 12 are illustrated in FIG. 1 as being arranged in a regular hexagonal shape, the number or arrangement of the secondary potting liquid outlets 12 is not particularly limited, and the effects of the present invention are not impaired. It may be appropriately selected within a range that does not For example, in consideration of the even alignment of the hollow fiber membrane and the uniform distribution and discharge of the secondary potting solution, the secondary potting solution outlet 12 may be arranged in a regular polygonal, symmetrical, or circular shape.

According to one embodiment, the column height of the secondary potting solution outlet 12 may be higher than the height of the outer wall of the inner jig 10 . The maximum discharge height of the first potting liquid should be lower than the column height. If the column height is higher than the outer wall height of the inner jig 10, the maximum discharge maximum height of the first potting liquid becomes the outer wall height of the inner jig 10, and thus more easily It may be possible to control the discharge height of the primary potting liquid.

The primary potting fluid inlet 21 communicates with the primary potting fluid outlet 11, and therefore the primary potting fluid injected from the outside through the primary potting fluid inlet 21 passes through the primary potting fluid outlet 11. It may be discharged to the inner jig 10 through. The primary potting liquid inlet 21 and the primary potting liquid outlet 11 may be coupled to each other to form a single flow path, whereby the primary potting liquid may be discharged only to the inner jig 10 .

The secondary potting liquid inlet 22 communicates with the secondary potting liquid outlet 12 and the secondary potting liquid flow path 13, so the secondary potting liquid injected from the outside through the secondary potting liquid inlet 22 is It may be discharged to the jig 100 and the housing through the secondary potting liquid outlet 12 and the secondary potting liquid flow path 13 . Since the secondary potting solution is dispersed and discharged through the column-shaped secondary potting solution outlet 12 and the secondary potting solution flow path 13, the secondary potting solution can be evenly distributed and discharged.

According to one embodiment, the inner jig 10 may be transparent or translucent. In this case, by removing the external jig 20 after the first potting, it is easy to determine whether there is an abnormality in the first potting and take action, and it is possible to reduce the amount of potting liquid used. Here, 'transparent or translucent' may mean that the object has a visible light transmittance of 15 to 100%, but is not limited thereto.

According to another embodiment, the inner jig 10 and the outer jig 20 may both be transparent or translucent. In this case, it may be easy to determine whether there is an abnormality in the first potting and take action without removing the external jig 20 after the first potting.

According to one embodiment, the external jig 20 may further include a fastening means for easily detaching/attaching the housing. For example, when the housing includes a protrusion engageable with the external jig 20, the outer jig 20 may further include a groove 23 engageable with the protrusion, but the fastening means is not limited thereto. .

The hollow fiber membrane potting jig 100 according to an embodiment of the present invention has a double structure, and during the first potting, the potting liquid is injected only into the inner jig 10 to block the end of the hollow fiber membrane, and during the second potting The potting liquid is uniformly introduced into the jig 100 and the housing through the secondary potting liquid outlet 12 and the secondary potting liquid flow path 13, so that the hollow fiber membrane can be potted simply and effectively. In addition, since the secondary potting liquid outlet 12 has a column shape, the hollow fiber membrane can be evenly aligned.

According to another aspect, there is provided a hollow fiber membrane potting method using the above-described hollow fiber membrane potting jig. A hollow fiber membrane potting method according to an embodiment of the present invention includes mounting a potting jig in a housing into which the hollow fiber membrane bundle is inserted; injecting the first potting solution into the first potting solution inlet, discharging it through the first potting solution outlet through the internal jig, curing it, and closing the end of the hollow fiber membrane bundle; and injecting the secondary potting solution into the secondary potting fluid inlet, discharging it to the potting jig and the housing through the secondary potting fluid outlet and the secondary potting fluid flow path, and curing it to fix the hollow fiber membrane bundle to the housing. have.

Figure 3 schematically shows a hollow fiber membrane potting method using a jig according to an embodiment of the present invention.

Figure 3 (a) shows the potting preparation step, the housing 200 and the jig 100 is mounted therein, the hollow fiber membrane 300 may be put therein a bundle. The hollow fiber membrane 300 may be evenly aligned without being biased to one side by the secondary potting solution outlet 12 in the form of a column.

According to one embodiment, the cross-sectional area of the bundle of hollow fiber membranes 300 may occupy 30 to 60% of the inner cross-sectional area of the housing 200 . In this case, the effect of preventing the tendency of the secondary potting liquid outlet 12 from being drawn during potting may be more excellent. For example, the cross-sectional area of the bundle of hollow fiber membranes 300 in the central portion of the housing may occupy 30 to 60% (eg, 40 to 50%) of the inner cross-sectional area of the housing 200 . For another example, the cross-sectional area of the hollow fiber membrane 300 bundle at both ends of the housing may occupy 30 to 60% (eg, 45 to 55%) of the inner cross-sectional area of the housing 200 .

Figure 3 (b) shows the step of injecting the first potting solution. As shown in FIG. 3(b), when the primary potting liquid is injected from the outside through the primary potting liquid inlet 21, the primary potting liquid outlet 11 communicates with the primary potting liquid inlet 21. The first potting liquid may be discharged to the inner jig 10 through the . Although it is illustrated that the diffuser 30 is further included in FIG. 3B , the diffuser 30 is not necessarily used.

Thereafter, the primary potting solution is cured, whereby the end of the bundle of the hollow fiber membrane 300 may be closed. The curing method may be appropriately selected depending on the type of potting liquid used, and as the potting liquid, a potting liquid commonly used in the hollow fiber membrane potting field may be used without limitation.

Figure 3 (c) shows the step of injecting the secondary potting solution. 3(c), when the secondary potting liquid is injected from the outside through the secondary potting liquid inlet 22, the secondary potting liquid outlet 12 communicated with the secondary potting liquid inlet 22 and The secondary potting liquid may be discharged to the potting jig 100 and the housing 200 through the secondary potting liquid flow path 13 . Accordingly, the secondary potting liquid can be evenly distributed and discharged.

Thereafter, the secondary potting solution is cured, whereby the bundle of the hollow fiber membrane 300 may be fixed to the housing 200 .

3( d ) shows a state in which the first potting and the second potting are completed.

Although not shown in FIG. 3 , an end of the bundle of the hollow fiber membrane 300 may be opened by cutting between the cured primary potting solution and the secondary potting solution. Accordingly, a flow path may be formed in the hollow fiber membrane 300 .

When the hollow fiber membrane 300 is potted using the above-described potting jig 100 , the hollow fiber membrane 300 can be potted simply and effectively.

According to another aspect, there is provided a hollow fiber membrane module including a hollow fiber membrane bundle potted using the above-described hollow fiber membrane potting jig. The hollow fiber membrane module according to an embodiment of the present invention may include a hollow fiber membrane bundle having one or more (for example, a plurality of) low-density hollow fiber membrane regions at one end of the hollow fiber membrane bundle fixed with a potting solution. . Here, the 'low-density hollow fiber membrane region' may mean a hollow fiber membrane region having a lower density than the average hollow fiber membrane density of a cross section of one end of the hollow fiber membrane bundle. According to the present invention, by performing potting using a potting jig including a secondary potting liquid outlet in the form of a column, a low-density hollow fiber membrane region may exist, and in this case, a relatively high density region of the hollow fiber membrane due to the low-density hollow fiber membrane region It is possible to uniformly arrange the entire hollow fiber membrane by reducing it, thereby securing a uniform water flow, minimizing the deviation of membrane contamination, and increasing the cleaning effect by air.

Simple modifications or changes of the present invention can be easily implemented by those of ordinary skill in the art, and all such modifications or changes can be considered to be included in the scope of the present invention.

Claims (6)

an internal jig including a first potting solution outlet, at least one secondary potting solution outlet in the form of a column, and at least one secondary potting solution flow path; and
an external jig coupled to the inner jig and including a primary potting liquid inlet communicating with the primary potting liquid outlet, and a secondary potting liquid inlet communicating with the secondary potting liquid outlet and the secondary potting liquid flow path; A jig for potting a hollow fiber membrane comprising a.
The method of claim 1,
A jig for potting a hollow fiber membrane in which the column height of the secondary potting liquid outlet is higher than the height of the outer wall of the inner jig.
The method of claim 1,
The external jig is a hollow fiber membrane potting jig further comprising a housing binding means.
The method of claim 1,
A hollow fiber membrane potting jig further comprising a diffuser on the primary potting liquid outlet.
A hollow fiber membrane potting method using the hollow fiber membrane potting jig of any one of claims 1 to 4, wherein the method comprises:
A potting jig is mounted on the housing into which the hollow fiber membrane bundle is inserted;
injecting the first potting solution into the first potting solution inlet, discharging it through the first potting solution outlet through the internal jig, curing it, and closing the end of the hollow fiber membrane bundle; And
injecting the secondary potting solution through the secondary potting fluid inlet, discharging it to the potting jig and the housing through the secondary potting fluid outlet and the secondary potting fluid flow path, and curing the hollow fiber membrane bundle to the housing;
A hollow fiber membrane potting method comprising the steps.
The method of claim 5,
The hollow fiber membrane potting method further comprising the step of opening the end of the hollow fiber membrane bundle by cutting between the cured primary potting solution and the secondary potting solution.

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