JP3324919B2 - Hollow fiber membrane yarn bundle, hollow fiber membrane module, and method for producing hollow fiber membrane yarn bundle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a hollow fiber membrane module in which hollow fiber membrane yarns are bundled and loaded into a housing case.

[0002]

2. Description of the Related Art FIGS. 5 and 6 are explanatory views of the structure of a conventional hollow fiber membrane module.

[0003] Generally, conventionally used hollow fiber membrane modules include a two-side sealed type in which a linear hollow fiber membrane is loaded in a cylindrical case and both ends of the case are sealed. There is a one-sided sealing type in which a hollow fiber membrane bent into a U-shape is loaded into a bottomed housing case and only the end face side of the hollow fiber membrane is sealed, and is used depending on the intended use. .

FIG. 5 illustrates a filtering device 110 using a hollow fiber membrane module 100 of a double-sided sealing type. The hollow fiber membrane module 100 includes a linear hollow fiber membrane 10.
1 is loaded in a cylindrical case 102, and both ends are sealed with a potting agent 103. Seal part end surface 105
The end faces of the hollow fiber membrane appear in the open state at a and 105b, and the fluid to be filtered that has flowed into the case 102 from the inflow hole 104a penetrates the membrane surface of the hollow fiber membrane 101 and passes through the end face of the sealing portion. It flows out of the openings 105a and 105b.

[0005] The filtration device 110 has a housing 111 into which the hollow fiber membrane module 100 is loaded. The fluid to be filtered is taken in from the inflow port 112 and flows into the hollow fiber membrane module 100 through the inflow hole 104a. To perform filtration.

The filtration device 110 is a so-called cross flow type in which the fluid to be filtered constantly flows on the membrane surface of the hollow fiber membrane 101, so that adhesion of foreign substances to the membrane surface can be minimized. A configuration is adopted in which the fluid to be filtered that has not passed through the outlet 113 of the housing 111 flows out through the outlet 104b of the case 102.

[0007] The permeated fluid that has passed through the hollow fiber membrane 101 flows out of the sealing portion end faces 105a and 105b, and is discharged from the permeated fluid outlets 114a and 114b.

On the other hand, the hollow fiber membrane module 2 shown in FIG.
Reference numeral 00 denotes a housing case 21 in which a number of hollow fiber membranes are bundled to form a U-shape,
0, and the gap between the hollow fiber membrane bundle 201 and the gap between the hollow fiber membrane bundle 201 and the housing case 210 is sealed and fixed with a sealing material 202 at one open end of the housing case 210.

Then, the sealed and fixed hollow fiber membrane bundle 2
The end of No. 01 and the cured sealing material 202 are cut together, and the end of each hollow fiber membrane is opened to form a hollow fiber membrane opening end face 203 as a sealing part end face.

This hollow fiber membrane module 200 is indicated by an arrow A2.
The various fluids flowing into the housing case 210 through the inflow holes 211 in the direction 01
, And is filtered to flow out from the hollow fiber membrane opening end face 203 in the direction of arrow A202.

Also, the hollow fiber membrane module 1 as described above
As a method for manufacturing a bundle of hollow fiber membranes in 00 and 200, a method as shown in FIG. 7 is employed. This drawing is directed to a conventional example of the hollow fiber membrane module 200 as an example.

First, a winding jig 301 is rotated by a shaft 302 to wind and form the hollow fiber yarn 201a into an elliptical shape. At this time, the yarn 201a of the hollow fiber membrane is very easy to break, so that a change in the winding speed is absorbed by a tension controller (not shown) (FIG. 7A).

Next, the yarn bundle 201b of the hollow fiber membrane wound into a predetermined number of turns is removed from the winding jig 301 (FIG. 7).
(B)) A yarn bundle 201c of a U-shaped hollow fiber membrane cut into two substantially at the center while being carefully handled so that the yarn is not entangled.
(FIG. 7C), the yarn bundle 201c of the hollow fiber membrane is loaded into the housing case 210 (FIG. 7D).

The ensuing sealing and fixing step and the opening formation are the same as described above. Further, in the case of the hollow fiber membrane module 100 using a linear hollow fiber membrane, both ends may be cut off when using the yarn bundle 201b of the above-mentioned oval hollow fiber membrane.

[0015]

However, when the hollow fiber membrane bundle is prepared by the above-described method, the hollow fiber membrane must be handled very carefully because the hollow fiber membrane is handled by the operator's fingers. They are very difficult to handle because they tend to break, loosen or become entangled.

In either case of the U-shaped or linear hollow fiber membrane bundle, when the yarn bundle is loaded in the case, the hollow fiber membrane is not uniformly located in the case and the dense area or In some cases, a region with a small number of hollow fiber membranes is generated and the density becomes non-uniform, and when this state occurs, the permeation flow rate in the dense region is reduced and the performance as a hollow fiber membrane module may be varied. .

Further, in a yarn bundle of a U-shaped hollow fiber membrane,
Both ends tend to spread outward in the case, and the density of the thread bundle at the center decreases when forming the sealing portion, which may cause sink marks and sinkholes due to curing shrinkage of the potting agent. Was.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and an object of the present invention is to provide a hollow fiber membrane as a constituent member of a hollow fiber membrane module for inserting into a case or the like. When forming into a yarn bundle of the shape
A hollow fiber membrane that is easy to handle, does not cause problems such as thread breakage, loosening, and entanglement, and can prevent the occurrence of uneven density due to the shape and bundling of the yarn bundle. To provide a yarn bundle.

Further, a method of manufacturing a hollow fiber membrane module using the hollow fiber membrane yarn bundle and a method of manufacturing the hollow fiber membrane yarn bundle will be described.

[0020]

In order to achieve the above object, according to the present invention, at least two warp yarns are provided at any position in the width direction of a plurality of hollow fiber membranes arranged as weft yarns.
Of yarns only knitting <br/> write while crossing between the respective hollow fiber membranes, the warp is twisted at the intersection between the hollow fiber membranes
I have.

[0021]

In the hollow fiber membrane module, the yarn bundle of the hollow fiber membrane described above is wound into a roll and loaded in a cylindrical case.

In the method for producing a yarn bundle of a hollow fiber membrane, at least one pair of warp supply members for supplying warp is provided, and the warp can be twisted by changing the position of each warp supply member. The warp twisting means, the intersection of the twisted warp, and the weft feeding means for placing the hollow fiber membrane as the weft between the warps continuing from the intersection to the respective warp supply members, the hollow as the weft yarn A yarn membrane is placed at the intersection of the twisted warp yarns, and the positions of the respective warp supply members of the warp twisting means are interchanged to twist the warp yarns and simultaneously weave hollow fiber membranes.

Accordingly, each hollow fiber membrane is knitted by warp yarns to form an interlocked yarn bundle, which is easy to handle without being separated, and does not cause problems such as breakage, loosening, and entanglement of the hollow fiber membrane. .

Further, the interlocked yarn bundle can be wound into a roll at a uniform density, and can be easily loaded into the cylindrical case of the hollow fiber membrane module.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for manufacturing a hollow fiber membrane yarn bundle, a hollow fiber membrane module and a hollow fiber membrane yarn bundle according to the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is an explanatory view showing a yarn bundle 10 of a hollow fiber membrane to which the present invention is applied. In FIG. 1, reference numeral 1 denotes a hollow fiber membrane as a weft, which is a bundle of one or a plurality of hollow fiber membranes.

Numeral 2 denotes a warp weaving the hollow fiber membrane 1, which is made of synthetic fiber such as nylon or tetron in this embodiment, and sandwiches the hollow fiber membrane 1 between two yarns 2a and 2b. Is woven like so. At this time, when weaving the hollow fiber membrane 1 with the warp yarn 2, it is necessary to pay sufficient attention to the tension control of the warp yarn 2 so that the hollow fiber membrane is not crushed or cut by the warp yarn 2.

Numerals 3a and 3b are joints where the yarns 2a and 2b are joined so that the hollow fiber membranes at both ends are not unraveled. When the warp is made of a thermoplastic material such as nylon or tetron as in the present embodiment, the joining portions 3a and 3b are easily and reliably joined by heat welding. It is also possible to adopt other methods, such as applying an adhesive.

By joining the warp yarns, the movement of the yarn bundle of the hollow fiber membrane in the warp direction is regulated, and particularly when the ends of the warp yarns are joined, the end portions of the yarn bundle are prevented from loosening.

Reference numeral 4 denotes an intersection between the yarns 2a and 2b. At the intersection 4, the yarns 2a and 2b do not simply intersect, but are twisted counterclockwise from the bottom upward (half-turn) as shown in FIG.

Accordingly, the warp yarn 2 in a state in which the yarns 2a and 2b are twisted does not unravel even when the warp yarns are not densely woven as in a normal woven fabric, so that the hollow yarn as the weft yarn is not used. The warp can be located at any position in the width direction of the yarn membrane 1.

The hollow fiber membrane yarn bundle 10 having such a configuration is
The length W in the width direction and the length L in the vertical direction can be set to arbitrary lengths. Further, the number of the warp yarns 2 is set so that the hollow fiber membrane 1 is not loosened and troubles such as entanglement do not occur. What is necessary is just to set suitably.

Further, in a mode in which the yarn bundle 10 of the hollow fiber membrane is used, as shown in FIG. 2A, the hollow fiber membrane 1 has a U-shaped hollow fiber membrane in which one end is bent. When the yarn bundle 20 is used, the portion C2 in FIG. 1 may be cut. Similarly, as shown in FIG. 2 (b), both ends of the hollow fiber membrane 1 are cut off to form a linear bundle of hollow fiber membranes 30.
Is used, the portions C1 and C3 in FIG. 1 may be cut.

Accordingly, by cutting a predetermined position in the width direction of the yarn bundle 10 in the warp direction, the width of the yarn bundle 10 can be freely set, and the cut end face becomes substantially straight, so that the roll When wound in a shape, the end faces can be easily aligned.

(Embodiment 2) FIG. 3 is a view for explaining a second embodiment. The hollow fiber membrane module 50 using the yarn bundle of the hollow fiber membrane of the first embodiment described above. FIG. 3A is shown in the order of the manufacturing process from FIG.

FIG. 3A is a view of a hollow fiber membrane yarn bundle 40 obtained by winding the hollow fiber membrane yarn bundle 10 described in FIG. 1 into a roll. Since the yarn bundle 10 of the hollow fiber membrane is an interwoven fabric,
It is easy to handle and easy to wind.

FIG. 3B is a view showing a state in which a yarn bundle 40 of a hollow fiber membrane wound in a roll shape is loaded in a cylindrical case 41. Although it seems that there is a gap in the cross section of the roll-shaped yarn bundle in the drawing, the drawing is simply drawn for easy understanding to explain the embodiment, and in fact, the hollow fiber membrane 1 is uniformly filled. ing.

FIG. 3C shows one side of the case 41 with the sealing portion 4.
1a is a state sealed with the potting agent 42.

FIG. 3D shows the potted sealing portion 4.
1a is cut at the portion C4, and the end face 1a of the hollow fiber membrane 1 appears in an open state. The hollow fiber membrane module 50 in the state shown in FIG. 3D corresponds to the hollow fiber membrane module 200 in the related art.

The hollow fiber membrane module 5 to which the present invention is applied
0 indicates a uniform distribution of the density without the occurrence of a dense area of hollow fiber membranes or an area with a small number of hollow fiber membranes inside the case 41, and a reduction in the permeation flow rate. The variation in performance at the time is also eliminated.

Further, the problem of generation of sink marks and sink marks in the central portion of the yarn bundle of the U-shaped hollow fiber membrane can be solved at the same time because the non-uniform density is eliminated.

(Embodiment 3) In the third embodiment,
The method for manufacturing the yarn bundle of the hollow fiber membrane described in the first and second embodiments will be described. In this embodiment, an essential matter of a method of manufacturing a yarn bundle of a hollow fiber membrane is described, and reference to a specific device configuration required for actual manufacturing is minimized. FIG.
(A) is illustrated in the order of the manufacturing process.

First, the necessary materials are the hollow fiber membrane 1 as the weft and the yarns 2a and 2b as the warp 2.

The yarns 2a and 2b are wound on reels (not shown) inside the shuttles 61a and 61b as warp supply members, and can be used by being pulled out from the shuttles 61a and 61b.

The hollow fiber membrane 1 as a weft is wound on a bobbin (not shown) having a diameter such that the hollow fiber membrane is wound without being broken or crushed. Supplied unbroken when needed.

FIG. 4A is a view showing a state in which weaving of the hollow fiber membrane 1 by the yarns 2a and 2b is started. Thread 2 as preparation
At the first intersection of a and 2b, a joint 3a is formed so that the weaving hollow fiber membrane 1 does not disperse. here,
Although two sets of right and left warp yarns are depicted in the figure, both are in the same form, and therefore the description will be made with respect to the left warp yarns in the figure.

The joining portion 3a side of the warp yarn 2 is fixed at a predetermined position. Shuttles 61a, 6 for supplying warp yarns
1b is separated by a space that allows the hollow fiber membrane to pass therethrough, and is held by a warp twisting means (not shown) capable of twisting the warp 2 by changing the position of each shuttle in the direction of arrow A1. ing.

Further, the weaving width of the yarn bundle of the hollow fiber membrane is set,
The hooks 62a and 62b are fixed at the right and left ends.

The method for weaving the yarn bundle of the hollow fiber membrane will be described below.

A) First, the shuttles 61a, 61 in FIG.
The shuttle 61a, 61b stops moving in a state where the first intersection 4a of the warp yarn 2 is formed by 1b. Next, the hollow fiber membrane 1 is moved from the first intersections 4a and 4a 'to the respective shuttles 6 from the tip 1a by a weft yarn feeding means (not shown).
The yarn is supplied so as to be placed between the yarns 2a and 2b following the yarns 1a and 61b.

B) Next, each shuttle is moved in the direction of arrow A1 in FIG. 4 (a), the positions are switched, and the warps 2 are twisted to obtain the state shown in FIG. 4 (b).

C) The first U-turn portion 1b of the hollow fiber membrane 1 is hung on the right end hook 62a and is supplied to the vicinity of the left end hook 62b while being placed on the intersection 4b (FIG. 4 (c)).

D) The positions of the shuttles 61a and 61b are interchanged to twist the warp yarn 2 (FIG. 4 (d)).

E) The second U-turn portion 1c of the hollow fiber membrane 1 is hung on the left end hook 62b and is supplied to the vicinity of the right end hook 62a while being placed on the intersection 4c (FIG. 4 (e)).

F) The positions of the shuttles 61a and 61b are interchanged to twist the warp yarn 2 (FIG. 4 (e)).

G) Remove the first U-turn portion 1b of the hollow fiber membrane 1 from the right end hook 62a.

H) The third U-turn portion 1d of the hollow fiber membrane 1 is hung on the right end hook 62a and is supplied to the vicinity of the left end hook 62b while being placed on the intersection 4d (FIG. 4 (f)).

I) The positions of the shuttles 61a and 61b are interchanged and the warp yarn 2 is twisted.

J) Remove the second U-turn portion 1c of the hollow fiber membrane 1 from the left end hook 62a.

K) Hereinafter, the above weaving method e) f) g)
h) i) j) is repeated a predetermined number of times as one cycle to weave a bundle of hollow fiber membranes of a required length.

L) The crossing point 4x of the last warp yarn 2 is joined so that the hollow fiber membrane is not loosened. By the above method,
The same thing as the yarn bundle 10 of the hollow fiber membrane described in FIG. 1 can be produced. Subsequent processing such as cutting and winding is as described in the first and second embodiments.

[0063]

According to the present invention, since the hollow fiber membrane is woven as an interdigitated yarn bundle, the hollow fiber membrane is easy to handle without being separated, and the hollow fiber membrane is not broken, loosened, or entangled.

Since the warp is twisted at the intersection between the hollow fiber membranes, the warp does not unravel even if the warp is not densely woven as in a normal woven fabric. It is possible to independently position the warp at any position in the width direction of the hollow fiber membrane 1, and it is possible to reduce the number of warps.

The interdigitated yarn bundle can be easily wound into a roll at a uniform density without causing problems such as cutting, entanglement and loosening of the hollow fiber membrane during the molding operation. The module can be easily loaded into the cylindrical case.
Therefore, the operation time for bundling and forming the hollow fiber membranes into a predetermined shape is reduced, and at the same time, the risk of causing defects is reduced.

In the hollow fiber membrane module, the hollow fiber membranes are loaded with a uniform distribution. Therefore, the permeation flow rate does not decrease,
Variations in performance among individual hollow fiber membrane modules are also eliminated. In addition, the problem of the occurrence of sink marks and sinkholes in the central portion, which is often seen in the yarn bundle of the U-shaped hollow fiber membrane, can be solved at the same time because the non-uniform density is eliminated.

In the method for producing a yarn bundle of a hollow fiber membrane, it is possible to weave a hollow fiber membrane that is difficult to cut and difficult to handle with a normal loom as a string.

[Brief description of the drawings]

FIG. 1 is a diagram of a yarn bundle of a hollow fiber membrane of the present invention.

FIG. 2 shows a variation of a yarn bundle of a hollow fiber membrane.

FIG. 3 is a view showing a manufacturing process of a hollow fiber membrane module using the hollow fiber membrane yarn bundle of the present invention.

FIG. 4 is an explanatory view of how to weave a yarn bundle of the hollow fiber membrane of the present invention.

FIG. 5 is a structural explanatory view of a conventional hollow fiber membrane module (both ends sealed type).

FIG. 6 is a structural explanatory view of a conventional hollow fiber membrane module (one side sealed type).

FIG. 7 is a conventional method for producing a yarn bundle of a hollow fiber membrane.

[Description of Signs] 1 Hollow fiber membrane (weft) 1a Tip 1b, 1c, 1d U-turn section 2 Warp yarn 2a, 2b thread 3a, 3b Joint 4,4a, 4b, 4c, 4d Intersection 10,40 Hollow fiber membrane 20 Thread bundle of hollow fiber membrane (U-shaped at one end) 30 Thread bundle of hollow fiber membrane (linear) 41 Case 41a Sealing part 42 Potting agent 50 Hollow fiber membrane module 61a, 61b Shuttle (warp) Supply member) 62a, 62b Hook C1, C2, C3, C4 Cutting part L Length in width direction W Length in vertical direction

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B01D 53/22 B01D 61/00-71/82 510 C02F 1/44 D03D 1/00-27/18

Claims (3)

(57) [Claims] To 1. A arbitrary position in the width direction of the plurality of hollow fiber membranes arranged as weft, seen write knitted while intersecting at least two yarns between each of the hollow fiber membrane as the warp, the warp threads , At the intersection between the hollow fiber membranes
Fiber bundle of the hollow fiber membrane, characterized in that that. 2. A hollow fiber membrane module, wherein the yarn bundle of the hollow fiber membrane according to claim 1 is wound into a roll and loaded in a cylindrical case. 3. A warp twisting means having at least a pair of warp supply members for supplying a warp, capable of twisting a warp by exchanging the positions of the respective warp supply members, and an intersection of the twisted warp yarns. And weft feeding means for placing a hollow fiber membrane as a weft between the warps continuing from the intersection to the respective warp supply members, so that the hollow fiber membrane as a weft is formed at the intersection of the twisted warp. A method for producing a yarn bundle of hollow fiber membranes, comprising placing and arranging a position of each warp supply member of the warp twisting means, twisting a warp yarn, and weaving a hollow fiber membrane.