JPS5940044B2 - Threaded semi-permeable membrane module - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a module comprising elements suitable for use in a compact, high-performance superlacrimal device.

More specifically, this invention relates to the above-mentioned small-sized ultrafilter, particularly a disposable module suitable for adjusting the composition of human body fluids, such as an artificial kidney.

That is, in the present invention, the cross section of a series of long semi-permeable membrane tubes is made into an envelope-like flat shape, and the tubes are wound in the shape of a screw feather, and the overlapping parts of the tube outer surfaces are brought close to each other. , and a casing covering its exterior;
One flow path is configured inside the semi-permeable membrane tube, and the other flow path is configured to communicate with the space near the central axis through each adjacent gap in the overlapping portion of the outer surface of the tube. It is an object of the present invention to provide a screw-shaped semi-permeable membrane module characterized in that it is formed so as to be guided to.

Conventionally, various types of modules including dialysis modules have been published or proposed as follows.

An overview of these can be seen as follows. b) Plate and frame type mouth) Tube coil (
5-piral wound type 2) Hollow fiber type e) Ple
ats type) multiple envelope type
No. 67683 discloses a particularly novel arrangement.

Among these, in the above-mentioned fields, the types E, koi), 9, 2), and e) have been frequently used.

These types include undiluted liquids, liquids to be processed, such as blood (herein referred to as "superficial liquid").

) has a long flow path and requires a large pressure difference between the inlet and outlet of the front side flow path, which causes various problems. This is one of the proposals made to solve the problem.

That is, the permeable membrane module has a plurality of layers of brim-like permeable membranes having an envelope-shaped cross section stacked coaxially and housed in a flat casing, and is defined by the outer surface of the polymerized permeable membrane and the inner surface of the casing. The space is used as a front side flow path, and the inside of the polymerized permeable membrane body is connected in parallel by facing the through holes provided on each polymerization surface, and a back side flow path (permeate flow path) is created so that it communicates with the outside of the casing. The inlet of the surface flow path is provided toward the center of the polymerized permeable membrane body, and the outlet of the surface flow path is provided so as to communicate with the outside from the outer peripheral surface of the permeation membrane body.

However, the above proposal has an uncertain configuration in which the back flow path fluidly defines the flow path of each annular envelope from the front flow path only by crimping (contacting) the envelope. Although the distribution to the branch flow path is commendable, it does not disclose any measures to increase the flow velocity on the surface of the membrane surface as much as possible and on average, thereby delaying or minimizing contamination of the membrane surface as much as possible. is raised as a problem.

An object of the present invention is to basically solve the above problems, and also to provide a considerable degree of freedom in defining the front side flow path (in conjunction with the casing), so that the front side flow path (as the liquid composition shifts to the back side) The flow rate decreases successively along the flow path.

) to maintain the desired surface velocity against the membrane at all, and to provide a module that can maintain its performance for a long period of time suitable for the module.

Another object of the present invention is to reduce the number of parts as much as possible (including integration into one piece).

) in the proposed structure. Further objects of the present invention will become apparent from the detailed description provided below.

In the present invention, a semi-permeable membrane tube has a semi-permeable membrane layer in the shape of a flat tube with at least an envelope-like cross section, and the inside thereof is divided into a front side flow path (front flow path) and a back side flow path (back flow path). It means that one of the channels can be configured as the other channel and the outside can be configured as the other channel.

In reality, it is very difficult to construct a tube with only a semi-permeable membrane layer due to the mechanical properties of the semi-permeable membrane layer, so a support layer is attached to the inside or outside of the semi-permeable membrane layer.

In the present invention, these semipermeable membrane tubes are wound into separate threads, and the overlapping portions of the tube outer surfaces are arranged closely adjacent to each other.

This arrangement is referred to herein as a semi-permeable membrane element (or envelope element).

Here, the structural features of this semi-permeable membrane element are as follows: 1) The tube extends continuously in a screw shape (like the wings of a screw conveyor or the steps of a spiral staircase made infinitely finer), and 2) The tube 3) has a flat plate-like cross section extending substantially in the radial direction, and 3) further has a circular cross-sectional hole coaxially with the central axis.

A specific example is detailed in FIGS. 14A and 14B.

In fact, it is desirable that such a semi-permeable membrane module wound into a threaded shape be constructed in a threaded shape in its free state.

In addition, the outer surfaces of the semipermeable membrane tubes are configured to be closely adjacent to each other at adjacent portions, thereby forming substantially one flow path, for example, a front flow channel or a back flow channel, in the adjacent gap between the outer surfaces of the tubes. That's why.

Specifically, the semi-permeable membrane module uses a casing having an inner height dimension larger than the height dimension measured with each outer surface of the casing in complete contact with each other.

For example, when the blades are actually incorporated into a module and used, the pitch between the blades is much smaller, and if the thickness of the blade as an element is t1 and the gap d (approximately 100 to 500 microns), then the pitch is expressed as p=t+d. The shape is such that it can be

By the way, the above-mentioned blade, that is, the semi-permeable membrane tube, has a support layer attached to the inside or outside of the tubular semi-permeable membrane layer.

First, some methods for manufacturing the above-mentioned support will be explained.

First, let's summarize the manufacturing method as follows.

■ A method of cutting from a cylindrical fiber aggregate with a central hole.

a. A fiber aggregate is used in which the main orientation direction of the fibers in the fiber aggregate is the circumferential direction.

b, the main orientation direction of the fibers in the fiber aggregate is the radial direction;
Alternatively, cross-oriented stacks are used.

(2) A method in which a molten thermoplastic resin composition is injected from multiple nozzles onto the mold surface of a partial shape of a screw wing, and the mold surface is successively slid to obtain a continuous support directly using the screw wing.

(a) Oscillating and/or horizontal oscillation of the plurality of nozzles (referring to circulatory movement in a plane that crosses the nozzle axis).

) A method for obtaining a support in which the main orientation direction of the fibers constituting the support is the longitudinal direction.

(b) A method of obtaining a support in which the main orientation direction of the fibers of the support is in the width direction and/or in a cross orientation by shaking the heads of the plurality of nozzles.

To carry out the method in item 1, it is first necessary to obtain a "cylindrical fiber aggregate having a central hole", so the manufacturing method will be explained.

1) Polypropylene, polyethylene, polyester, etc. are deposited on a rotating mandrel M through a large number of nozzles N, N
'...... melting and injecting from the many nozzles N
, N'... can be reciprocated (traverse, arrow T) parallel to the mandrel axis to obtain the fiber aggregate f (see Fig. 1; F in the figure is the brim;
P indicates press roll).

For this method, it would be more advantageous to adopt the method described in section (2) below with some modifications, and the above-mentioned nozzle N.

It should be adopted in cases where the series of equipment leading to N'... can be repurposed.

11) More generally, adhesives (also called bonding agents, herein referred to as adhesives).

) Applicable non-woven fabrics and woven fabrics (hereinafter referred to as ``non-woven fabrics, etc.'').

) can be rolled and polymerized, and if necessary, a step of solidifying the adhesive or melting and solidifying can be added to obtain the fiber aggregate f.

In FIG. 2, the mantle M includes a nonwoven fabric S1 whose main fiber orientation is in the longitudinal direction. Involve S2.

In this case, the adhesive is spread on the surface of the nonwoven fabric in the area AI-A1 t A2-A2.

When distributing the adhesive, it is desirable to do so so that the adhesive layer after adhesion does not form a flow-tight layer, and also to select an adhesive that is compatible with the above-mentioned nonwoven fabric, etc., and to develop sufficient adhesive strength. It is necessary to force it.

The above-mentioned non-woven fabric can withstand the front side liquid and the back side liquid, preferably does not contaminate both liquids, or at least does not contaminate or affect the front side liquid, and is not damaged during the element manufacturing process, such as purification valves, rayon, etc. , cotton, cellulose acetate, polypropylene, polyethylene, polyvinyl chloride, polyamide, polyester, etc., one or more types of fibers (including long fibers and short fibers) selected from materials commonly used for nonwoven fabrics.

). Adhesives are polyvinyl alcohol based, acrylic ester copolymer based, acrylic ester vinyl acetate copolymer based, polyvinyl acetate based, ethylene, vinyl acetate copolymer based, polyamide based, acrylamide-polyvinyl alcohol copolymer based, depending on the above fiber material. A wide range of adhesives can be selected from adhesives, including adhesives based on adhesives, sodium carboxymethyl cellulose, and polyethylene oxide.

Further, in the winding polymerization, the nonwoven fabric S1. Area A of S2
Depending on the type of adhesive to be sprayed on 1-A, , A2-A2, for example, heating ventilation (hereinafter referred to as "heat ventilation") may be applied for a considerable period of time.

), it is temporarily stored in a processing case C that has porous walls (inside and outside), and a hot air stove (not shown) is used.
The heat ventilation (E) can be used as the exhaust port as shown by the arrow H1 inside the room.

Generally, the shape of the inner and outer diameter surfaces of the fiber aggregate f obtained by such a method of winding and polymerizing a nonwoven fabric or the like is modified by cutting or the like as necessary.

The fiber aggregate f obtained in this way is
suitable for implementation.

111) Non-woven fabric etc. S3. S4 is supplied toward the die D and punch Q that are to punch out the outer diameter.

(See Figure 3). The above non-woven fabric etc. S3. S4 is the die D, punching center holes 03 and 04 before reaching the top;
Spraying the adhesive in the husband area A3-A3 y A4-A4 is performed, and then the adhesive is moved onto the die D and punched out with the punch Q, and the case C is passed through the die D.
3 is pushed inside.

Such operations are repeated, and if necessary, the fibers are heated and ventilated as shown by the arrow H3 and guided to the exhaust port E3 through the suction pipe, thereby continuously forming the fiber aggregate f'.

The punched nonwoven fabrics and the like are pushed downward in the figure due to frictional resistance with the inner wall of the case C3 and are bonded to each other under pressure.

Therefore, initially, it is possible to use a stopper (not shown) that maintains appropriate friction with the inner wall of the case C3, the top surface of which is substantially aligned with the top surface of the die D.

The fiber aggregate f' thus obtained is suitable for carrying out the method in item 1 above.

From the above description, the entire nature of the fiber aggregates f, f' will be understood.

Next, the manufacturing method of the supports 11a and 11b will be described (see especially Figures 7 to 13A and B).

In the drum, 11a is the support obtained by carrying out the above-mentioned Section 1 method a or H section method a, and 11b is the support obtained by carrying out the above-mentioned Section 1 method b,
Refers to the support obtained by carrying out the above method.

Fiber aggregate f1 or 11 obtained as explained with reference to Figures 1 and 2 in item i) and ii) above.
From the fiber aggregate f' obtained as described in No. 1) with reference to FIG. A specific example of the method for obtaining the support 11 (represented by "support 11" when referring to both will be described with reference to FIG. 4).

This can be said to be a specific example of I-term methods a and b (hereinafter both will be referred to as "method I").

First, in FIG. 4, the fiber assembly f is slid onto the mandrel Ms from above the figure, and the mandrel Ms is inserted into at least one of the plurality of supports Mc through the arm Ma.
Supported by books.

Further, the fiber assembly f is in pressure contact with its outer periphery, and a plurality of driving rolls P (only one of which is shown by a chain line in the figure) are pivotally connected to the top plate Bt and the middle plate Bm so as to be rotationally driven.
s , Ps , Ps . . . , and are surrounded by the drive rolls Ps , Ps .

Ps... is a spiral cutting line that can be planned on the outer circumferential surface of the fiber aggregate f1 when cutting out the support 11 from the fiber aggregate f1, and a line perpendicular to the axis thereof. The angle θ with the surface, that is, the torsion angle (Jis Bolol, No. 1204
If γ is θ = 90 - γ (all are originally (angle) degrees), they are arranged at an angle θ (see Fig. 4, and the drive rolls Ps, Ps, and Ps (drive system not shown).

The roller Rp positions the lower surface of the fiber assembly f.

One end (lower end in the figure) of the driven fiber aggregate f has a straight cutting edge (also includes a jig saw blade).

) to cut out the support.

The cutting edge is reciprocated by the drive section G, and the operation is guaranteed by the cutting Mb section of the mandrel.

Furthermore, instead of the cutting blade, it is also possible to use a "jet cutter" using a high-pressure water jet manufactured and sold by, for example, eight companies.

The cut out support body 11 is subjected to surface treatment as necessary.

In zone Z, a mixture of surface material (short fibers, etc.) and adhesive is sprayed on at least one side of the roll Ru,
Pressurized by Rv.

The rolls Ru and Rv are driven by a drive source I.

Furthermore, at least one of Ru and Rv can be made into a hot roll if necessary.

The apparatus used in such a method is assembled and supported by the substrate Bb.

The support 11 obtained in this way is mounted on a rotating table J fixed to a vertical shaft Kj. L can be stored and taken out as needed, or can be continued to the next process.

There is no need to explain that Naolol Rp, Ru, and Rv are all conical rolls, and it will be easily understood that they should be so.

In addition, the upper end of the mandrel Ms is extended, and the fiber aggregates f, f, f, etc., into which waste is successively inserted at appropriate portions, are all arranged in a heat ventilation section as shown in FIG. 3, for example. They can be connected integrally, or they can be extended downward to connect to the next process (see Figure 5).

Next, methods a and b (hereinafter both will be referred to as ``Method ■'') in Section 2 above.

) will be described with reference to FIGS. 5 and 6.

A detailed explanation will be given below along with an example of an apparatus applied to method (1).

The above-mentioned conveyor V includes a group of nozzles Hz tHz', Hz"..., which are appropriately spaced upwardly on the upper surface of the vibrating screw conveyor V, which has the dimensions and shape necessary for forming a nonwoven fabric and is fixed to the mandrel Mv. The nozzles Nz, , N, z', Nz'' are arranged opposite to each other on the upper surface.
...The colony is traversed as shown by the arrows Tc and Tr, and the above conveyor ■Top surface nozzles Nz, Nz', Nz''--
A thread-like nonwoven fabric is formed by using a material suitable for melt spinning among the above-mentioned materials that are thermally sprayed.

The nozzles Nz, Nz', Nz" . . . are arranged in the radial direction of the conveyor conveyor (2), and the arrangement is determined according to the area of the circular arc portion that each nozzle is responsible for.

This means that the inner edge 11i of the support 11 obtained by this method
This is a necessary consideration in order to keep the thickness and fiber distribution uniform around and between the outer edge 11o.

The screw feather-shaped nonwoven fabric thus produced is flattened by a leveling roll Rq as necessary to impart desired density and rigidity.

The conveyor V is connected to an upper vibrating device (vibrator 1 for spiral chute, not shown) via a mandrel Mv.

) imparts vibration. The above-mentioned nonwoven fabric is sprayed with the above-mentioned compounding agent on the required surface in the zone Zs as necessary, and then pressurized by rolls Ru and Rv.

The roles Ru and Rv are as explained above.

The support thus obtained is support 11a.

11b depends on whether the traverse (arrow) Tr is slow and the traverse Tc is rapid (thereby obtaining the support 11a) or vice versa (thereby obtaining the support 11b). You can choose any.

The thickness of the support 11 thus obtained is selected to be about 0.1 to 3 mm in the above-mentioned fields, preferably about 0.1 to 1 mm. The diameter of the support 11a is about 0.2 to 3 mm, and the diameter of the support 11b is about 0.1 to 2 mm.

Next, before describing the method for manufacturing the element 10, let us summarize the method.

(2) A semi-transparent film 12 is formed on the surface of the support 11.

a, semi-transparent membrane 1 on at least two wide sides of the support 11a;
2, and the cross section of the support 11a is similar to the semi-transparent membrane 1.
A method of obtaining a threaded wing-like envelope element by defining all the layers containing 2 from the outside world.

b. After forming the semi-transparent membrane 12.12 on one of the wide surfaces of each of the supports 11b and 11b, the semi-transparent membrane 12 is
．． A method of obtaining a threaded wing-shaped envelope element by arranging the supports 11b and 11b to face each other and joining their respective edge portions together.

First, the method a will be explained with reference to a specific example shown in FIG. 7 and below.

The main part of the apparatus and the processing state of the intermediate 13 in the process of forming the semi-permeable membrane 12 on the surface of the support 11a are shown in a streamline diagram below the main part of the apparatus.

Support 11 obtained by the above-mentioned method I or method a
a1 is placed on the mandrel and its lowermost surface is positioned at a fixed position by a roll Ra, and the roll Ra is driven by a drive device Ir.

The support body 11a fed out from below passes through the through hole Y1 of the hopper Y by the feed rolls Rb and Rc, and forms an intermediate body 13 with a surface layer to become a semi-permeable membrane on its surface.
The surface layer surface is dried in the air within the time range passing through the range of distance (height) ht.

Next, water (temperature is adjusted by adding cold water if necessary).

) The solvent in the surface layer is subsequently removed in zone W.

Such a surface layer treatment method is, for example, a case where a cellulose acetate dope is formed as a surface layer on the support 11a, and will be explained below using a similar example.

Then, as shown in FIG. 7B, the intermediate body 13 (free length h2) long enough to obtain several elements 10 after processing is cut out, hung from a hook Nh, and placed in the hydrosphere W for the required time.

The hopper Y will be explained with reference to FIGS. 8 and 9.

According to the above example, the hopper main body YIO has an inlet Y11 for receiving the cellulose acetate dope, which communicates with the gallery Y13 through the flow path Y1□.

The shim Y20 defines an opening ¥2□ facing the support 11a, and the shim Y20 itself has a thickness approximately proportional to the distance (radius) from the center of the spiral support 11a. is defined to be equal to the thickness shown on the left.

The front plate Y3o is a gap screw Y40t
In this example, the hopper Y40' is assembled integrally with the hopper body Y1o and the shim Y20 to form the hopper Y.

Next, in correspondence with the cross section of the separate support 11a, the gap between the opening Y in the dope coating (which controls the thickness of the dope layer) is the gap CD in the wide surface of the support 11a (top and bottom in the figure). , the gap CE is on both (ear) edge surfaces, and the CD is CE.

[A semi-permeable membrane layer is formed on at least two wide sides of the support, and if necessary, both edges of the support are made fluid-tight.'' refers to the above-mentioned CD and CE in particular. This expression also includes CD=CE.

This means that in the process of manufacturing the support body 11a, the thickness of the threaded state is given the highest possible dimensional accuracy and the practically necessary dimensional stability under pressure, but the width is The size regulation is based on the above-mentioned method 1b (see Figures 3 and 4), but it is difficult to expect much dimensional accuracy, and as shown in Figure 9, the linear shape of the opening ¥1 of the hopper Y On the other hand, the shape of the support body 11a when it passes through the opening ¥1 is curved, and due to a slight increase in the gap, the gap C
This is because it is necessary to plan so that the gap CD does not become like D and CE, and the gap CD regulates the thickness of most of the semi-permeable membrane 12, and as long as it is a homogeneous membrane, the membrane at both edges It will be easily understood that the gap regulating the thickness must not be CE or CD.

The hopper Y can be supported at the center end of the screw wing by the downward extension Me of the mandrel and the pipe Yp for feeding the dope.

Further, an example of the hook Nb for suspending the intermediate body 13 in the hydrosphere W will be explained with reference to FIG. 10.11.

A tube W made of soft rubber, placed near the tank wall that holds the hydrosphere W, above the water surface of the hydrosphere W, and through which water under appropriate pressure is passed.
P is made from a thin needle-like tube with an inner diameter of up to 1 mm, and a loop similar to a knob is formed at the top, and one end hangs down briefly, bends diagonally, and pierces the tube WP. The other end extends under the water surface of the hydrosphere W in the above-mentioned pierced state to form a hook, and the hook has a sharp tip that is roughly half-sharp near the lowest end (preferably near the tip of the hook). It is formed.

This allows a small amount of water to pass through the support 11a, whose wide surface and both edges are all surrounded by a doped surface layer (arrows in FIG. 11).

Of course, such water passage is not necessary in this example, but is advantageous for this example and broader membrane composition applications.

Next, an example of the order method will be explained in detail with reference to FIGS. 12 and 7.

Branches M e ', M connected to the top of the mandrel M's
The supports 11b and 11b, which are filled with waste at r', are supported on a vertical shaft and are rotatable around the shaft, which is a spherical roller R'.
e is positioned on the branch M'e, M'r.

In the method using the apparatus illustrated in FIG. 12, it is a necessary condition that the supports 11b and 11b are both screw-shaped blades having the same hand and twisting direction. This is an indication.

For example, if the support 11b on the left side of the figure has a right-hand thread, the screw wings will be reversed when moving from the support 11b to the support 14, and the roll R'a will have a right-hand thread, as seen in casters of movable furniture. The configuration (not shown) is such that it can be rotated on a horizontal axis in the figure (this will be explained in element 10ii below).
manufacturing process).

As can be seen in FIG. 12, the supports 11b, 11b are polymerized to form the support 14 on the mandrel M's, the underside of which is positioned by a roll R'a, and the roll R'a is connected to the drive device I'. Driven by r.

The support body 14 thus let out downward is the feed roll R'
b and R'c to form a surface layer on the surface while penetrating the through hole of the hopper Y'.

In the following explanation, the intermediate 15 is processed in the same manner as in the explanation of the forward method a.

Said hopper Y' is also a downward extension of the mandrel M'
e and a pipe Y/p for feeding the dope.

However, the difference from the method (2) is that the surface layer thickness of both edges of the support body 14 is not required (the thickness may be 0 mm).

Also, the hook Nh as shown in Figure 7.10.11 does not require this.

Said hydrosphere W of intermediate 13.15 obtained in method ①
After the treatment in the medium is completed, the intermediate 13.15 is treated by (a) replacing the moisture in the surface layer with glycerin in an aqueous glycerin solution (glycerin concentration is 50 to 70% by weight), or (b) ) Freeze-vacuum drying treatment or leprosy treatment.

Element 10i can thus be obtained from intermediate 13.

To obtain the element 10ii from the intermediate 15, the supports 11b and 11b were polymerized to form the support 14 in the above-mentioned step ①, and the support 11b, ie, the unit body, was once provided with the semi-permeable membrane 12 on one side. The separated two units are again combined with a polymer with semi-permeable membranes 12 and 12 facing each other (using methods such as fusion, welding, adhesion, etc.) to obtain element 10xi. be able to.

(See Figure 13).

It will be understood that element 10i corresponds to aspect 2 and element 10ii likewise corresponds to aspect 3 of the invention.

In the element 10i, the outer side of the threaded wings (including the gap between the threaded wings) forms the surface flow path 16, and the support 1
It can be easily agreed that the back passage 17 is formed in the direction in which 1a extends in a threaded manner.

In addition, in the element 10ii, the space defined by the semi-permeable membrane 12゜12 and the coupling parts 18a, 18a connects the surface flow path 18,
A back flow path 19 is formed in the outer space including the support body 11b.

The internal channels of the above-mentioned "screw feather" envelope (back channel 17 in element 10i, front channel 18 in element 10 ii) constitute a series of channels, that is, one long channel for each roll of the envelope. .

Accordingly, when configuring a module using the above element 10i or 10ii, a plurality of turns of the element 10 may be used as necessary.
1 (or 10ii) can be polymerized to form a plurality of parallel channels inside the envelope.

The semi-permeable membrane 12 used in the present invention, that is, the wet or dry type semi-permeable membrane made of synthetic resin, includes membranes suitable for super-stainless applications, such as cellulose acetate, cellulose acetate butyrate, and polyamide. can.

The main part of a module consisting of 1011 turns in all elements is illustrated in FIG. 14A.

The case is omitted along with the figure B.

The surface flow path extends from (arrow) φ1 to φ2 and fills the outer diameter surface of the element 10i, and extends between the envelopes (arrow) φ3. φ3゜φ3...
..., the surface fluid is concentrated (arrow) φ
・Leaded out from the thread by 4.

In the figure, the flow of the front side fluid (undiluted solution) is indicated by a hatched triangular arrow head, and the flow of the concentrated front side fluid (concentrated solution) is indicated by a triangular arrow head with hatching.

(The same applies to the figures below).

Further, the back side fluid (permeate liquid) is led out of the system through the single channel (arrow: φ5).

In the figure (the same applies to the following figures), the flow of fluid on the back side is indicated by a triangular arrow head without hatching.

The main part of the module consisting of 10ii elements and 1 turn is shown in Figure B.
For example:

The surface flow path is indicated by a single line (arrow) φ1 that continues inside the envelope, and the surface fluid is concentrated near its exit.

The back flow path is from the surface of the envelope (arrow) φ2. φ2゜φ2・
..., as shown in the center (arrow) φ3
As shown in , it is led out of the system.

14A and 14B show a module of the present invention (hereinafter referred to as "this module").

This is the most basic configuration example, and the front and back channels are also extremely simplified.

A more practical example of this will be explained below with reference to the drawings, but if necessary, the element 10i (or 10ii
), it will be understood that many variations of the above-mentioned front and back channels can be constructed by polymerizing and using them.

Here, a plurality of turns (multiple threaded) element 10i (or 10
The monopolymer ii) can be easily produced in the same way as the support 14 described above.

This is the same as the above explanation with reference to FIG.
The method for obtaining M'e and M'r in FIG. 12 may be repeated as many times as necessary, and it is very easy to imagine from the above drawings and descriptions that the branches M'e and M'r in FIG. 12 may be provided with one more axis. It is understood that the method for obtaining the multi-volume element J 10i (or 10ii) including such a device can be easily derived based on the disclosure of this specification and drawings. say.

Now, one embodiment of the module 100 will be specifically described with reference to FIGS. 15 and 16.

The element 10i configured in five layers is the case top 110.
The upper end thereof is passed through the slits 111 at five locations around the circumference, and is embedded and fixed in the adhesive layer 112.

The layer after hardening, the five screws extending through the element 10i at the five locations, and the gear lary 113 cut and formed together connect the flow channels on the back side of each screw blade at once. .

Inside the threaded separate envelope of the element 10i, there is a specified fluid,
For example, a specified amount of air or a fluid (liquid may be used) that does not interfere with the sealing joint described later is sealed, and the envelope is sealed at both ends 10'e.
, 10'e are preferably hermetically bonded.

This means that during the formation of the adhesive layer 112, the envelope (inside)
This is convenient for securing a flow path on the back side.

The ends of the envelope may be sealed by, for example, ultrasonic welding, or by applying a desired adhesive of a viscosity that penetrates several millimeters beyond the ends of the envelope.

It is preferable in terms of process control to actually form the adhesive layer 112 at the same time as the adhesive layer 132 described later.

The above element 10i and the slit 11 of the case top 110
1,111,111..., at least the above requirements 1
0i Screw body end 10'e, 10'e, 10'e...
The element 10i is housed in the case body 120 with the slits 121 and 121 passing through the slits 121 and 121 respectively.
．． 121..., are passed through the screw barrel ends 10'e, 10'e, 10'e,..., on the other end side of the element 10i.

The center of the bottom 124 is provided with a riser pipe (through holes 123, 123, 123, . . . forming a front side flow path), a bubble 125 that is in close contact with the inner diameter of the element 10i, and a bubble 125 that extends above the riser pipe. , a top 126 having an outer diameter separated by a flow path 151 from the inner diameter of element 10i.

The outer wall of the case body 120 is continuous with the bottom 124 and includes a body 128 and a waist 127 that is in close contact with the outer diameter of the element 10i.

Next, the wall 131 and bottom 1 of the case bottom 130
A suitable amount of curable adhesive having a suitable viscosity is supplied to the space 133 defined by the case body 120 and
By assembling from below, the case top 110, case body 120, and case bottom 130 are joined.

A column is provided at the center of the bottom 132 of the case bottom 130.

The column has the through hole 123, 123°123...
, a shoulder 134 defining a lower edge, a bub 135 connected to the bottom 132, and a channel 15 extending upward from the bub 135.
2, and a top 136 defining the top 136.

After the case top 110, case body 120, and case bottom 130 are bonded together, including the element 10i and containing a curable adhesive in the space 133 in the case bottom 130, the upper side of the case top 110 is bonded as described above. Fill the space 114 (into which the threaded shank ends 106° 10'e, 10'e, etc. of the element 10i protrude as described above) with the curable adhesive as described above. At the same time, a flat plate cover (not shown) that can sufficiently cover the upper surface of the case top 110 is placed to cure the curable adhesive at the two locations.

After the adhesive hardens, the top surface is cut and the gear lary 11 is
3, and screw body ends 10'e, 10'e.

10'e..., to communicate all the envelopes of the elements 10i to the gear gallery 113, and
A through hole 116 forming a back channel entrance of the pocket 115 is bored at a position that separates and connects the gear gallery 113 and the element 10i communicating therewith, and is connected to the channel 150.

Cover 140 is then bonded to the top surface of case top 110, including the top surface 117 of the hard cut adhesive layer.

This means that the gear assembly 113, the pocket 115, and the flow path 152 form independent spaces.

It goes without saying that a gasket (not shown) may be used instead of joining the cover 140 and the top surface 117.

The cover 140 has a nozzle 160 that forms a front side inlet at a position corresponding to the pocket 115, and a nozzle 170 that connects to the flow path 152 and forms a front side outlet in the center.
Also, the nozzle 1 forms a back side outlet at a position corresponding to the gear lary 113 (for a ring-shaped gear lary 113 as in this embodiment, any position above this can be determined).
80 are arranged respectively.

Various cellulose resins, hard vinyl chloride resins, polystyrene resins, SAN resins, ABS resins, MMA resins, polyacetal resins, polypropylene resins, etc. are used as materials for such cases and covers, among which the nozzles 160 and 170.

In addition to the above materials, polyethylene resin, soft vinyl chloride resin, chlorinated polyethylene resin, etc. can be used for 180.

The liquid flow within this module 100 will be explained.

(See mainly Figure 15A). The backside flow guided from the nozzle 160 through the pocket 115 through-hole 116 (see FIG. 15E) to the flow path 150 flows within the area Z1 between the screw wings of the element 10i (typically 100 to 150 microns,
(preferably 150 to 300 microns) flow centripetally in parallel in the other radial direction and reach the upper region of the inner flow path 151.

During this time, part of the flow passes through the semi-permeable membrane 12 and becomes a back side flow, and the front side flow is reduced by that amount.

Next, the flow flows from the lower area of the flow path 151 between the screw barrels, swirls along the screw wings in the area Z2, and flows downward toward the front side through the through hole 123 provided in the bub 125 of the riser pipe in the area Z3. , 123.

123..., and flows to the flow path 152.

During this time, part of the front side flow continues to be the back side flow,
Surface flow decreases.

One way to deal with this is to use the zone Z1 as described above.
．． This figure shows an example of a vine configuration that can be designed to provide a flow path area corresponding to the amount of front side flow in each of Z2.

The front side flow then passes from the flow path 152 to the nozzle 170 disposed at the center of the cover 140 and is led out of the module 100.

The back flow is at the threaded shank ends 10'e, 10'e of the element 10i.

From 10'e..., we gathered at Gallery 113,
It is led out of the module 100 through the nozzle 180.

This module 100 with such a configuration is small and has a small volume of retention space for surface fluid such as internal flow channels 150, 151, 152, etc., and as described above, maintains the effective flow velocity of fluid on the surface surface toward the membrane at a preferable high speed. It can be designed so that it can be used, and the degree of freedom is wide.

That is, by allowing the front side flow to flow in at least two ways to the element 10i, the degree of freedom in design can be expanded.

In addition, although the dimensions of this module 100 in the vertical direction are exaggerated in the drawings in FIG. 15A1 and FIG. difference)
It is easy to store it in a size suitable for handling (in a size that is easy to pick up).

Furthermore, since it has the above-mentioned configuration, it has excellent features such as being sufficiently robust.

In addition, in the drawings from FIG. 14 onward, the cross-sectional shape of the screw wing of element 10i is a flat rectangle, and the cross-sectional shape of the screw wing of element 10ii is a flat oval circle, which are shown to distinguish them.

Next, an actual embodiment of this module 200 using element 10ii will be described with reference to FIG. 17 and subsequent figures.

Element 10i is composed of 5 layers, and 3
It is used as two groups of double winding and double winding, the former is applied to the front stage of the front side flow path and the latter is applied to the rear stage of the same flow path. This configuration allows the flow velocity to be maintained high on average.

Elements 10 are placed in five slits, 211, 211, 211, etc., arranged on the bottom plate of the case top 210.
ii, pre-sealed like the former but with separate envelope end 1
Insert 0/e, 10'e, 10'e and attach case body 2.
20, a slit 221 is provided in a bottom plate 223 connected to a peripheral wall 222.

221. At 221, the envelope end 10/e on the other end side of the screw feather.
, 10'e, 10/e, . . . , and the case top 210 and case body 220 are coupled to each other.

Next (see Figure 18), attach the jig tray J to the case body 2.
As shown in the figure, the shoulder j3 of the jig tray j secures a space j4 between the lower end of the jig tray j and the bottom j2.

Next, the above-mentioned curable adhesive is applied into the space j4 through the opening 252 in the riser pipe 224 of the case body 220 (which tapers upward and has ribs 225 and 226 on the outside and inside) and into the envelope end 10'e, 10/e.

10'e..., is injected to around level 253, for example, while being lightly compressed in the axial direction.

Next, an appropriate amount of the adhesive is injected onto the upper mounting surface of the case top 210, and the next jig tray j is mounted on top of it, and the space j is
5 and cure the adhesive.

jl is the peripheral wall of jig tray j.

After the adhesive has hardened, the end faces and, if necessary, the outer circumferential face are cut to form cured resin layers 212 and 228, as well as a clearance IJ 213 of the thickness and depth of the screw wings.
, 214, and 229 are deleted.

Here, gear rally 213 is 3 envelope end 1Q%.

10e and 10e are connected to each other, and the gear assembly 214 communicates these envelope ends 10'e and 10'e, and furthermore, the gear assembly 22
9 is the envelope end 10'e, 10/e, 10/e of 5...
...to be communicated.

The cover 240 and the case bottom 230 are then coupled to the case top 210 and the case body 220, respectively, as well as to the hardened layers 212 and 228 in a fluid-tight manner.

In this way, the front side flow path is connected to the nozzle 260 and the gear assembly 21.
3.3 envelope, gallery 229.2 envelope, gallery 2
14 is then formed as a nozzle 270.

Back side channels are formed from the free gaps of all envelopes of element 10ii, such as channels 250, 251 and nozzles 280.

In this way, the overall structure is strong and compact, and the so-called fouling of the alternating permeable membranes 12, 12, 12, . Therefore, this is unlikely to occur based on the surface flow velocity across the membrane, and all of the above objects are achieved.

[Brief explanation of drawings]

1 to 3 are perspective views of essential parts of an example of an apparatus for explaining a method for obtaining a perforated cylindrical fiber bundle 7, respectively.
The figure is a perspective view of a main part of an example of an apparatus for obtaining a support 11 from a fiber bundle 7, FIG. 5 is a plan view of a main part of an example of an apparatus for directly obtaining a support 11, and FIG. 6 is a main part of the same. Elevation view, FIG. 7A is an elevational view of the main part of the apparatus for forming the semi-permeable membrane 12 on the surface of the support 11a, FIG. 7B is an elevational view of the main part showing the treatment of the intermediate 13 in the hydrosphere, Figure 8 is a front view of hopper Y, Figure 9 is A- of Figure 8.
A sectional view, FIG. 10 is an elevational view showing an example of the hook Nh in use, FIG. 11 is a partially enlarged view of part X' in FIG.
FIG. 2 is a front view of essential parts of an example of a device for obtaining the intermediate 15;
FIG. 13A is an elevational view of element 101, and FIG. 13B is an elevational view of element 10ii, and in each case, the inside of the circle shows an enlarged sectional view. 14A is a perspective view of a main part cross-section showing the concept of the simplest module consisting of elements 10i and 10ii, respectively, FIG. 15A is a longitudinal cross-sectional view of the module 100,
B is a BB plan view of the above A, C is a C-C sectional view of the same, D
is a C-C sectional view of the same, E is a developed cross-sectional view of E-E of B above, F
is a developed view of the F-F cross section of C, and Figure 16 is module 10.
FIG. 17A is a vertical sectional view of the module 200, and FIG.
FIG. 18 is a sectional view taken along the line H--H of the above-mentioned A, and FIG. 18 is a sectional view illustrating the manufacturing process of this module. The code is 2 for each element or its intermediate module.
Digit, 3-digit number, and the rest are commonly indicated by letters of the alphabet.

Claims (1)

[Scope of Claims] 1. A series of long semi-permeable membrane tubes with a flat envelope-like cross section, which are wound into a threaded wing shape, and the overlapping portions of the tube outer surfaces are closely spaced. Comprising a semi-permeable membrane element and a casing covering the outside thereof, one flow path is configured inside the semi-permeable membrane tube, and the other flow path is communicated with the space near the central axis through each adjacent gap in the overlapping portion of the tube outer surface. A screw-separated semi-permeable membrane module with a structure in which each flow path is divided and guided to the outside of the casing. 2. The semi-permeable membrane tube comprises a plate-like support layer made of a continuous fiber aggregate material, a semi-permeable membrane layer substantially covering the outer periphery of the plate-like support layer, and the support layer inside the semi-permeable membrane element. 2. The threaded semi-permeable membrane module according to claim 1, wherein one of the flow paths is a back side flow path and the other flow path is a front side flow path. 3. The semi-permeable membrane tube comprises a semi-permeable membrane tube layer and a support layer that substantially covers the outer periphery of the semi-permeable membrane tube layer, one flow path configured inside the semi-permeable membrane element is the front flow path, and the other flow path is Claim 1: The threaded semi-permeable membrane module according to claim 1, wherein the passage is a back side flow passage.