JPS5959216A - Hollow yarn type fluid separation element and preparation thereof - Google Patents

Abstract

PURPOSE:To efficiently form a module free from single yarn cutting and having a large dimension without imparting excessive load or a twist to a hollow yarn in bundling the same, by a method wherein hollow yarn strands are woven into a reed screen like material which is, in turn, wound up in a spiral shape. CONSTITUTION:Hollow yarn each having selective permeability to a fluid mixture are wound up by a wind-up apparatus such as a bobbin or the like in a 10-10,000-yarn unit to form a strand as a weft yarn which is, in turn woven into a reed screen like material by using a warp yarn. This material is wound in a spiral shape to form a hollow yarn bundle showing an almost columnar shape as the whole. At least one end of this hollow yarn bundle is impregnated with a solidifying material such as resin or the like in a casting mold to form a fluid- tight structure by curing and the resin molded port is cut at a proper position in the hollow yarn bundle longitudinal direction thereof to expose the opening parts of the hollow yarns to form a hollow yarn type fluid separation element.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a specific structure 1 (a hollow fiber type fluid separation element arranged in a bundle of a large number of hollow fibers having permselectivity) and a method for manufacturing the same.

A method for separating fluid mixtures using a membrane is to apply an energy gradient such as a pressure difference or a concentration difference to one or both sides of a selectively permeable membrane that allows certain components among the various components present in the fluid mixture to permeate preferentially. It is an operation that separates or concentrates the components of a part, and various applications can be seen for gases and liquids. Small-scale examples include artificial kidneys and artificial lungs, and large-scale industrial applications include seawater desalination and the food industry. Many specific examples include chain networks in industrial plants, concentration of acid accumulation from air, and separation of hydrogen in chemical plants.

On the other hand, the hollow fiber type is often used as a membrane type because it can increase the membrane area per unit volume and has a large capacity with a small size.Many proposals have been made for membrane separation devices using hollow fibers, and these are mainly Emphasis is placed on how to efficiently collect hollow fibers and form them into a separation module. Focus is placed on the strength of hollow fiber single fibers, and problems such as single fiber breakage are mentioned. I see something questionable.

For example, Japanese Patent Publication No. 44-5526 discloses a method in which a hollow fiber formed in a strand is removed from a winder, and a hook element is manipulated to make the winder flat and lengthwise to form a single compact bundle. However, in this method, it is necessary to prepare a large number of the above-mentioned compact bundles to form a module, resulting in poor productivity and the possibility of single fiber breakage due to excessive force being applied to the single hollow fibers when making compact bundles. has certain drawbacks.

Further, in Japanese Patent Application No. 11 Sho 47-8595, hollow fibers are wound around a web, and in Japanese Patent Application Laid-Open No. 47-22387, hollow fibers are wound around a pair of supports positioned almost parallel to each other, and the hollow fibers are wound in a convoluted manner. It is shown how to form
The need to feed the hollow fiber by rotating the hollow fiber feeding means at low speed reduces productivity, and at the same time, unexpected load 11 or twist is applied to the hollow fiber at the feeding site, which also causes the disadvantage of single fiber breakage. Motsu.

The present invention aims to solve the following drawbacks, and in particular, when converging hollow fibers, the hollow fibers can be bundled without applying excessive load or twisting, without single fiber breakage, and without using a complicated device. As a result of intensive research with the aim of providing a hollow fiber type fluid separation element that can efficiently form large modules, is also technically inexpensive, and has high reliability, we have developed a hollow fiber strand woven in a sudare shape. We have discovered that winding it in a spiral is very effective and have arrived at the present invention.

That is, the present invention involves weaving a sag-like material by using a strand consisting of 10 to 10,000 hollow fibers having permselectivity for a fluid mixture as a weft thread, and threading the sag-like material into a spiral shape through the warp threads. A hollow fiber type fluid separation element characterized in that an opening of the hollow fiber is provided at the end of the hollow fiber; The hollow fiber 1 having permselectivity is wound around the winding device.
By making a strand consisting of 0 to 10,000 strands and using it as the weft, weave a sudare-like material, and by winding the sudare-like material in a spiral shape through the warp threads, the whole becomes a fluid-tight structure, and the sand→→ →4. A method for manufacturing a hollow fiber type fluid separation element, characterized in that an opening of the hollow fiber is provided at the exit end of the hollow fiber.

The present invention will be explained in more detail below with reference to the drawings.
C.Explain.

The present invention is characterized in that hollow fiber strands having permselectivity for a fluid mixture are woven in a sagging pattern and wound in a spiral.

The hollow fiber strand refers to a bundle of 10 to 10,000 hollow fibers, preferably 50 to 1,000, and the strand can be made using a bobbin or outer edge split type as shown in Figure 1(a). bobbins, Figure 2 (
A preferred method is to wind hollow fibers in units of 10 to 10,000 around a winding device such as a skein in which fibers are arranged in a cylindrical shape as shown in (-) above. When weaving a sudare-like article using the hollow fiber strands obtained in this way as weft threads and other warp threads, the strands may be cut individually for each weft thread, or may be continuous. , and may even form a loop.

Although FIG. 1 specifically shows an example of an embodiment of the present invention by step, the present invention is not limited thereto. First, No. Itt (R) shows a state in which the hollow fiber is wound onto a bobbin. The hollow thread on the bobbin]
It is wound up at appropriate intervals so as to form one block in the warehouse 0 to 10,000 times. The thus wound hollow fiber is cut into chunks at one location on the circumference of the bobbin and linearly stretched to form one hollow fiber strand 1. The hollow fiber strands 1 are sequentially tied together using warp yarns 2a to 2d at a portion near the cut portion, as shown in FIG. This binding work can be done manually if the hollow fiber strands are large, but productivity is high enough, but it is more preferable to use a simple device that is equipped with a part for installing the hollow fiber strands, a means for pulling out the warp threads, and a mechanism for intertwining the warp threads. There are many things you can do. (b) The hollow fiber strands formed in a sagging shape as shown in the figure (c) are further bundled by winding them in a spiral shape as shown in the figure, and the warp threads 2
a to 2d are engaged at the outer edges of the refocused hollow fiber bundle, the entire body is almost mold-hardened to form a fluid-tight structure, and further, the hollow fiber bundle is held at an appropriate position in the longitudinal direction of the resin molded part. After cutting, the opening of the hollow system is sealed, and the shape shown in FIG. 3(d) is obtained, resulting in a hollow fiber type fluid separation element, which is ready for use.

In Figure 1 (bl), only two sets of warp threads 2 are illustrated, but when the hollow fiber strand is long, three or more sets are arranged, and when the shape shown in Figure (C) is formed, the longitudinal direction of the hollow fiber strand is It is preferred that the outer diameter of the yarn bundle is approximately uniform after being spirally refocused over the length of the warp yarns. Any material can be used as long as it is not damaged by the process, and a thin string can also be used instead of a thread.When forming the hollow fiber strand into a sagging shape, the warp tension t must be kept to an extent that does not damage the hollow fiber. Although it is better to tighten the hollow fibers, it is preferable that the special hollow fiber strands in the spiral shape shown in FIG.

FIG. 2 shows a case in which the hollow fibers are wound onto a winding. In this case, it is preferable to remove the hollow fiber strand from the skein without cutting the hollow fiber strand, leaving it in a looped shape and forming it into a sag.

FIG. 3 shows an example in which a hollow fiber strand wound around a large-diameter bobbin is cut and used as a weft thread several times in succession to form a sag. Furthermore, it is also possible to arrange a large number of hollow fibers that are simultaneously unwound from a large number of bobbins to form a strand of 10 to 10,000 hollow fibers as shown in FIG.

The hollow fibers that can be used in the present invention may be made of any material, and a plurality of hollow fiber bundles formed as described above are prepared, the plurality of bundles are arranged simultaneously, and both ends are solidified and formed to form a fluid-tight structure. It goes without saying that it may be formed. In addition, when forming the hollow fiber type fluid separation element, other rod-like or tubular shapes may be used as necessary.

A support such as a plate can also be used.

Since the present invention has the above-described configuration, it is possible to easily bundle hollow fibers without using a complicated device, and has the following advantages: It also has the advantage of eliminating the risk of single yarn breakage.

[Brief explanation of the drawing]

1, 2 and 3 represents a hollow fiber strand, 2, 2a, 2b, 2c and 2di'! , indicating the warp threads. Further, 3 in FIG. 1 is a hollow fiber winding bobbin, and 4 is a solidification forming part. 5 in FIG. 2 indicates a skein bottle for winding the hollow fiber. (cL) (b) Kono 2 layer (a) Cb) (o) (d) Paper/m

Claims (1)

[Scope of Claims] (+1) A strand-like material is woven by using a strand consisting of 10 to 1000 hollow fibers having permselectivity for a fluid mixture as a weft, and the material is spirally weaved through its warp threads. 1. A hollow fiber type fluid separation element characterized by having a cylindrical structure with a diameter of 1 cm as a whole by winding it into a shape, and having an opening for a core hollow fiber at its protruding end. (2) A hollow fiber having permselectivity with respect to a fluid mixture is wound around a winding device and 10 to 10,000 of the hollow fiber is wound.
After making a strand consisting of a book and using it as a weft to weave a sudare-like material, and then twisting the sudare-like material in a spiral shape through the warp threads, a hollow fiber bundle having an almost cylindrical shape as a whole is formed. A method for manufacturing a hollow fiber type fluid separation element, characterized in that the cylindrical hollow fiber bundle is solidified and formed by the assimilation side to form a flow-tight structure, and the opening of the hollow fiber is provided at the protruding end.