HU209743B - Method and device for setting a bundle of filter - membranes consisting of capillary - membranes in a case - Google Patents

Abstract

The invention relates to methods and apparatus for the mechanized immersion of capillary membrane bundles in apparatuses for the separation of components of liquid solutions and gas mixtures during their manufacture, which consists in mounting the resin in the required volume in the module housing interlocked in a device designed for this purpose of appropriate quality in the resin receiving chambers is poured over the Modulgehaeusen flexibly connected Gieszrohre, after which the rotating frame of the device is rotated around the axis "Y" with a centripetal acceleration of 10 g to 100 g / g9.81 m / sec2 /, and while having a number of revolutions corresponding to the quality characteristic of the resin, so that the cutting plane "V" falls between the resin inclusions in the defective and flawless fibers, after which the revolving frame is kept rotating at a constant angular velocity for 10 to 30% of the polymerisation nszeit of the resin, and after the completion of the process, the device turned off, the Gieszrohre are exchanged on the Modulgehaeusen, last Gieszverfahren is repeated. The method is implemented by means of a device having a rotating frame * stub (14; 15) for the supply and removal of the cooling air, the resin accommodating chambers (8) and a variable speed motor, the chambers (8) via flexible Gieszrohre (10) with the Anschluszrohrstutzen (2) of the Modulgehaeuse (1) are connected {Kapillarmembranbuendeleinbau; cameras; Component separation; Solutions; Gas mixtures}

Description

Scope of the description: 12 pages (including 5 sheets)

HU 209 743 Β eccentric rotation provides a second type of resin having a higher viscosity (10-20 Pa.s) and a higher binding time (4-8 hours), after which the two ends of the filter membrane stack protruding from the filter module housing are cut perpendicular to the longitudinal axis of the membranes. cut in a plane.

The apparatus of the present invention is based on a centrifuge with a rotating frame, resin containers, and flexible casting tubes, the rotating frame (7) of which is adapted to receive one or more single or multi-level, central or eccentric arrangements of one or more filter modules (1), and for cooling air inlet and outlet. has an air duct (14) and a vent (15) and a variable speed drive motor (6).

Field of the Invention The present invention relates to a method and apparatus for incorporating a filter membrane bundle of tubular membranes into devices for separating components of liquid solutions and gas mixtures, particularly into filter housing.

Liquid solutions or components of gas mixtures for separating (concentrating, treating, etc.) are using capillary membranes arranged in a sealed housing, preferably based on the principle of ultrafiltration, microfiltration, dialysis, gas diffusion or reverse osmosis.

One of the fundamental problems in designing a suitable device, such as a filter module, is the incorporation of the capillary membrane bundle in a housing (filter module housing), i.e., securing and properly sealing the capillary membrane in the housing.

The capillary membrane bundle in the filter module housing (which is used as the most common occurrence, hereinafter referred to as the synonym of the housing) is generally fixed with a synthetic resin. In most cases, the fixative resin is filled in a manufac- turing manner using the process of utilizing the principle of traffic vessels, for which a resin having special properties is required. However, patents dealing with the design and construction of filter modules generally do not detail the mode of enema, only mentioning that the specially formed and arranged capillary membrane membrane is fixed by injection with resin in the filter module house.

Examples of such solutions include: No. 4,002,567. U.S. Pat. No. 4,196,196 discloses an ultrafiltration device comprising a filter module in which semipermeable-walled hollow fibers (capillary membranes) are approximately parallel and bundled together, and this bundle is fixed in the filter module with a molded mold material.

No. 2 236 226 U.S. Pat. No. 4,197,195 relates to the manufacture of asymmetric membranes in capillary (capillary) form and their use in ultrafiltration. According to the description, the continuously produced hair tubular membranes can be cut to the desired length, i.e. about 10 to 100 cm long, and can be assembled into a bundle of about 1005000 pieces which can be incorporated into a suitable housing. The capillary membranes are adhered to the two ends of the housing with an epoxy resin or other adhesive.

No. 0 062 086 European Patent Specification describes the attachment of filter membranes by pouring a liquid curing resin in the filter module housing to form a plastic molding block, which fixes the capillary filter membranes bound to the housing at the end of the filter module housing.

No. 0 170 354 European patent discloses a filter membrane separator, the parts of which are formed by a cylindrical shell and a bundle of parallel tubular or capillary filter membranes, the ends of the filter membranes enclosed by a cast resin fastening mass secured inside the case.

As can be seen from the foregoing, the majority of patents relating to the incorporation of the filter membrane into the filter module do not deal more specifically with the manner and means of filling the retaining resin.

The only document dealing with this in more detail, which has become known to us, is 0 165 478. European Patent Application. As can be seen from this description, the hollow fiber filter membranes (hair tube membranes) are fixed by means of a sponge (fixing resin) in the filter module housing by sealing the filter module housing with a molded opening at two ends after the filter membrane is placed in the filter module housing. and, via a centrifugal field connected to the inlet port connected to the inlet, a resin resin, optionally polyurethane, inside the filter membranes, or between the filter membranes, such that the penetration height of the resin resin between the filter membranes is greater than that of the filter membranes. Thus, the ends of the filter membranes can be released by a straight cut, while the solidifying resin resin seals the seals between the filter membranes. The different penetration height is provided by the counter-force of compression inside the two-sided hollow fibers (capillaries) relative to the intermediate space, where the backpressure and penetration depth are controlled by compressed air or centrifugal field introduced through the side-nozzle of the filter module housing.

The above solution is that due to the porosity of the hair tubing filter membranes, the pressure difference can only be maintained for a short time and to a minimal extent, so that the penetration cut height is small.

EN 209 743. Since the pore sizes of each filter membrane are not the same, the penetration height will not be constant in the filter membrane fibers, but will vary depending on the compression in each fiber.

The situation is even more problematic in the case of even smaller values of air pressure differentials in larger pore membranes (microfilter, dialysers), as larger pore sizes increase air permeability. Because of this, it is even more difficult to determine the optimum cutting height and at least complicated pneumatic systems and control units must be used.

A further disadvantage of the process is that it does not allow direct bypassing of the defective (hole) filter membrane by enema.

An apparatus suitable for carrying out the above-described method comprises a centrifuge for rotating about the axis perpendicular to the longitudinal axis of the filter module housing, resin storage vessels connected by flexible casting tubes to molds mounted at the two ends of the filter module housing, and a compressed air source connected to the side nozzle on the side of the filter module housing.

A disadvantage of the known apparatus is that it requires an auxiliary energy source and a complicated control device for controlling the height of the casting resin, and also allows only rectangular pouring at the ends of the filter module housing.

The object of the present invention is to provide a method for incorporating a filter membrane bundle of capillary membrane membranes into a device for separating components of liquid solutions and gas mixtures, particularly a filter module, which enables the sealing of the filter membrane bundle in the filter module housing more efficiently and in a higher quality, and a separate operation. provides a clear separation of the defective capillary membranes from the flawless ones and their elimination by sealing from the operation of the filter module, and ultimately makes it possible to determine the height of the optimum cutting plane in the two end regions of the filter module. Another object of the invention is to provide an apparatus suitable for carrying out the above process.

According to the present invention, the object of the present invention is to provide a method for fixing the filter membrane bundle in resin molding in an image step with two different quality fixing resins through the irrigation tubes connected to the side stumps of the filter module housing, in which the filter module housing 10 is arranged centrally in relation to the axis of rotation. While rotating at a centripetal acceleration of -100 g (g = 9.81 m / sec ² ), a synthetic type resin resin having a first viscosity of 8-10 Pa and a binding time of 5 to 40 minutes is applied to the ends of the filter module housing and the filter module housing at a constant angular velocity. rotate to 10-30% of the binding time of the first type of resin resin, and thus form a stopper perpendicular to the longitudinal axis of the capillary membrane at the ends of the filter module housing, and thereafter the other In step d), the filter membrane bundle, externally sealed, as in the first step, through the side nozzles at the desired pour angle (? finally, after the completion of the second step and removal of the molds, the two ends of the filter membrane stack protruding from the filter module housing are cut off in a cutting plane perpendicular to the longitudinal axis of the capillary membrane.

By means of the measures of the present invention, the sealing of the ends of the ends of the filter membrane is sealed where the defective fibers are sealed due to the high resin fastening resin in them, so that the operation is precluded from operation and the double pouring ensures perfect sealing on the filter membrane. On the other hand, it makes the position of the optimum cutting plane perfectly clear.

In order to prevent the formation of dirt, it is expedient that the ends of the filter membranes are sealed in the region of the side-joints with a non-perpendicular surface, but with an oblique plane, whereby no flow deadlines are formed in the corners. In order to achieve this, i.e., in order to create a <90 ° pouring angle, the method of the invention in the second step is to place and rotate the filter module housing or housings at the desired pour angle relative to the axis of rotation.

In the filter module housing with side-sides of the opposite side, the second step of pouring the ends of the filter membrane bundle with a pouring angle of <90 [deg.] Is performed in two passages, by swapping the joints of the casting tubes and by reversing the arrangement of the side joints.

In contrast, in the case of filter module housing with side-stems of the same side, the second step of pouring the ends of the filter membrane bundle with the angle of discharge of <90 ° is carried out in one pass at both ends of the filter module housing in the same way.

If the rectangular pouring is suitable for a given purpose, in the second step of pouring the ends of the filter membrane bundle at a = 90 °, a plurality of, preferably three, filter modules are arranged centrally over the rotational axis and rotated in parallel planes.

The method according to the invention is implemented by means of a device known in the art in a manner known per se as a cylindrical cylindrical, with a watch window, an openable, bearing rotor, lower shaft driven centrifuge, and also a rotating frame, resin storage vessels, and resin containers with filter modules housed to accommodate filter modules. has flexible connecting tubes.

According to the invention, this apparatus is characterized in that its rotating frame is formed in a manner suitable for receiving one or more levels of central or eccentric arrangement of at least one filter module housing.

EN 209 743 Bv, an air intake for supplying and discharging cooling air, and an air outlet, the resin storage vessels are formed as a resin storage box with a horizontal partition wall and a variable speed drive motor is provided for its drive.

The invention will be described in more detail with reference to the accompanying drawings, in conjunction with the accompanying drawings.

In the drawing a

Figure 1 shows a filter module with a resin resin embedded in a filter membrane bundle according to the method of the invention, in section; the

Figure 2 is a schematic side view of an apparatus according to the invention; the

3a. Figure 1 is a plan view of a centrifuge axis of a filter module for rotation axis of the irrigation device in the first step of the pouring; the

3b. Figure 2 shows a rotational axis arrangement of a filter module with two side flanges on the opposite side in a first pass, top view of a second step of a pouring angle <90; the

FIG. Fig. 2 shows the filter modules according to Fig. 2 in the second pass of the second step of the pouring, after the replacement of the casting tubes and the rearrangement of the filter modules; the

Fig. 5 shows the arrangement of a filter module with two side-flanges on the same side relative to the axis of rotation during the second step of the pouring angle <90 °; the

Figure 6 shows a schematic side view of a rotating frame of the irrigation apparatus according to the invention with a plurality of filter modules arranged in planar planes, while

Fig. 7 shows an enlarged sectional view of a filter module extending at an pouring angle of <90 ° with an even molded mold.

As shown in Fig. 1, a filter membrane stack 3 of a tubular membrane is inserted into the filter module housing 1 and the resin for the fixation is mechanized by the method of the filter module housing 2 on the side stumps of the filter module 1, optionally in the <90 ° spout. at the ends of each, where a resin body 4 is formed. The resin bodies 4 are formed in two steps detailed below using two different quality casting resins. The Y axis of rotation of the resulting resin body 4 forms a pouring angle with the longitudinal axis of the filter module housing 1 and the hair tubular membranes.

According to the invention, the mechanized pouring of the ends of the filter modules 1 is carried out in the apparatus shown in Fig. 2. This unit includes a 5-foot, cylindrical, rotatable, open-lid, rotatable, rotary, bottom-axial centrifuge with variable speed motor. In the centrifuge rotor 7, the housings of the various devices, in particular the filter module housings, are fixed at one or more planar levels, centrally to or from the axis of rotation Y, eccentricly to obtain a <90 ° pouring angle. In the centrifuge, an air inlet nozzle 14 is provided for the supply of cooling air, and an air outlet 15 for discharging the used air. An integral part of the rotary frame 7 is the specially designed resin storage box 8 having a partition wall 9, into which the selected liquid fixing resin is filled in a predetermined amount. When the apparatus is rotated, the centrifugal force causes the retaining resin to flow from the resin storage boxes 8 to the ends of the filter module housing through flexible casting tubes 10 and through the side nozzle 2.

In the first step of the pouring or of the filter membrane bundle 1 in the filter module housing 1, the filter module housing 1 is centrally arranged relative to the rotational axis Y of the centrifuge 7, as shown in Figure 3a, and is closed with molds not shown at both ends. The retaining resin is fed into the filter module housing 1 through the side nozzle 2, during which first the still liquid synthetic resin is loaded into the resin container 8 in a predetermined amount, forming a first type resin sealing plug for the end sealing of the filter membrane stack 3. This sealing plug forms the first portion of a resin body 4, which resinates the filter membrane stack 3 in the filter module housing 1 in a sealed manner.

The specially formulated synthetic resin resin used is short, having a binding time of about 5 to 40 minutes and a low viscosity of 8 to 10 Pa.s. The resin storage boxes 8 are flexibly connected to the side stumps 2 of the filter module housing 10 through casting tubes. After the retaining resin is loaded, the rotating frame 7 of the apparatus is rotated about 10-100 g (g = 9.81 m / sec ² ) of centripetal acceleration around the axis of rotation Y. The speed setting depends on the density, viscosity, surface tension, polymerization rate and polymerization temperature of the particular fastener resin. This means that the correct speed is determined by the above parameters.

During the operation of the apparatus, the specified amount of fixative resin is introduced into the filter module housing 1 and, under the effect of the centrifugal force, flows into the tubular membranes of the filter membrane bundle 3 or inside them. As shown in Figure 7, the first type of resin is poured into the mold 13 to a height D. It is also apparent from the same figure that the height of penetration (penetration) into defective fibers is higher than that of flawless fibers. In the case of flawless fibers, the elevation height is equal to the height D of the resin level in the mold 13. In flawed threads, it rises with the rise "C" distance. The reason for this difference is that in counterfeit fibers, the counter-force of the increase in air pressure caused by bilateral resin flow prevents the resin from inflating according to the principle of force balances. Since capillary membrane fibers cannot be considered a closed tube system, ie porous, and thus to some degree of gas per4

EN 209 743 Β so that the pressure is maintained for only a short time, and therefore the use of a special, low-viscosity, quick-bonded synthetic resin is substantially used. Because the centrifugal force of the resulting centrifugal force is directly proportional to the viscosity or density of the resin, but at a square rate of rotation, the optimum speed setting is also important.

In the case of defective fibers, since air compression is virtually non-existent due to the free airflow at the H sites, the fastener resin freely enters the "D C" height of Figure 7 in the absence of adequate resistance in the membrane fibers.

After the at least partial solidification of the first type of resin plug resin, in the second step of pouring, a second type of resin resin is introduced at the ends of the filter module housing 1 in a similar manner to the first step, whereby the filter module housing 1 has an eccentricity corresponding to the angle α relative to the rotation axis α with respect to the angle α. 7, as shown in Fig. 3b. This second type of synthetic fixing resin is no longer able to penetrate inside the sealed membrane fibers, only between the membrane fibers, thereby forming the casting height "A" of the resin body 4. In selecting the second type of synthetic resin resin (resin), the main consideration is to fill the space between the membrane fibers without airbag and to adhere perfectly to the wall of the filter module housing 1, thereby ensuring a good seal. With this in mind, the second type of resin resin has a higher viscosity (10-20 Pa.s) compared to the first titanium fastening resin and a shorter binding time (4-8 hours). Here too, it is essential to minimize the amount of polymerization heat so that the resulting heat of reaction does not damage the capillary membrane material. To adjust the polymerization rate, the inactivator is added to the selected resin at different concentrations per membrane and filter module type. Depending on the speed of the rotating frame 7 and the different filter module houses (e.g., polypropylene or stainless steel), the heat of the reaction heat is also due to the difference in the thermal conductivity.

Using the operations described above, pour into the container 3b. 1, and then the arrangement of the filter module housing 1 in the rotary frame 7 as shown in FIG. 4, instead of the casting tubes 2 depicted on the molded and solidified 12 resin bodies, the other 2 of the filter module housing 2 and the above enema operations are repeated.

After the hardening of the resin and removal of the molds, the final length of the filter module housing 1 is finalized, the cutting plane "V" having a height "B" is chosen so that it falls in the middle of section "C" so that the defective fibers remain closed while the ends of the flawless fibers are closed. they are free. By appropriately dimensioning the mold 13 and properly determining the amount of resin deposited, this "V" cutting plane coincides with the faces of the filter module housing 1, so that the cutting plane can be easily and clearly defined from the production point of view.

The apparatus according to the invention is also suitable for receiving the filter module housing having the one-sided flaps shown in Fig. 5. In this case, the second step of the pouring angle α <90 ° can be performed in one pass at each end of the filter module housing.

If the boundary surface of the resin body 4 is not obliquely formed, but is perpendicular to the longitudinal axis of the capillary membrane or the filter module housing (≤ 90 °), the rotating frame 7 of the apparatus according to the invention shown in Figure 2 is replaced by the rotating frame 7a of FIG. the filter module housings 1 to be poured are arranged centrally relative to the axis of rotation Y, irrespective of the arrangement of the side members 2 of the filter module housing. The filter module housing 1 in this rotating frame 7a is preferably arranged in up to three planar planes and each has two resin storage boxes 8. Both ends of the filter modules 1 as described above can be discharged in one pass in the second step of pouring.

Example

The concrete process of pouring (securing) the filter membrane in the filter module housing can actually be divided into three stages, such as preparation, casting and cutting.

1. Preparation

An appropriately prepared, size-cut filter membrane stack 3 is inserted into the cleaned, degreased filter module housing 1, and two ends of the filter module housing 1 are screwed into the molds 13 of Figure 7, optionally formed as closed cups of silicone rubber. The filter module thus prepared is placed centrally in the rotary frame 7 shown in Fig. 2 and the resin storage boxes 8 are placed above it. The nozzle at the bottom of the resin storage boxes 8 is connected through a casting tube 10 to the side stumps 2 of Figure 1 of the filter module housing.

2. Casting

Casting must be done in two parts.

a) The resin storage boxes 8 are filled with a first type 2 component solvent-free bifunctional reactive diluent epoxyamine resin (viscosity: 8.2 Pa.s, binding time: 30 minutes) in an amount such that the end of the filter module housing 1 Fill in the “D” height indicated in Figure 7. Then, the centrifugal opening 11 is closed and the drive motor 6 is switched on. The speed of the rotary frame 7 of the centrifuge shown in Figure 2 is determined so that the volume of resin entering the filter side housing 2 on the side nozzle completely fills the volume of the mold 13 to the extent of the height D by the plug.

For different membrane types, assuming a constant resin, different centrifugal forces must be set using the speed. so for example

EN 209 743 Β

For a cut-off value of 000 dalton, the optimum centripetal acceleration value for PSF capillary membranes is 52 g (g = 9.81 m / sec ² ).

After proper polymerization of the synthetic resin (about 10-15 minutes), the drive motor 6 of the apparatus is switched off.

b) In the second step of casting, the filter module housing 1 is positioned centrally (a = 90 °) or eccentric (a <90 °) on the rotary frame 7a and 7 according to the desired pour angle. The resin storage boxes 8 are then filled with a second type of 3-component epoxy resin (viscosity: 12.5 Pa.s, bonding time: 5.2 hours), and then the centrifuge drive motor 6 is switched on again. The resin passes through the flexible casting tube 10 into the sealed module ends. The rotational speed of the rotary frame 7, 7a must be such that as a result of the acceleration resulting from the action, the resin fills the available space completely, but does not squeeze the membrane fibers. This acceleration is 21g for a PSF 10,000 membrane (g = 9.81 m / sec = 2).

In the second step of casting, the polymerization time and heat of the resin is adjusted with additives. After the appropriate rotation time (0.5-2 hours), the drive motor of the centrifuge 6 is switched off. When casting in the apparatus shown in FIG. 1, the casting operations described are repeated in the arrangement shown in FIG. 4.

When casting is carried out in the arrangement shown in Figure 5, the second step of casting takes place in one pass.

Figure 7 shows the pour angle for the arrangement shown in Figures 3b, 4 and 5, and is <90 ° for the arrangement of Figure 6, and a = 90 for the arrangement of Figure 6. After the solidification of the second type resin, the filter module thus discharged is removed from the rotating frame 7 of the centrifuge and the molds 13 are unscrewed from its ends.

3. Cutting

The ends of the discharged filter modules are cut off in a cut plane V as shown in Figure 7 on a properly designed target machine.

According to the present invention, as described above, the assembly of filter tubing and other similar devices is capable of reliably and reliably sealing the capillary membrane bundles with simultaneous functional exclusion of defective fibers and a clear definition of the cutting plane.

Claims (6)

PATENT CLAIMS 1. A method for installing a filter membrane bundle consisting of capillary membranes in a housing for separating components of liquid solutions and gas mixtures, in particular filter modules, wherein, after placing the filter membrane bundle in a filter module housing, the filter module housing is applying a defined amount of anchoring resin that penetrates and closes the ends and proximity of the hairline membranes, and utilizing the different pouring heights between the ends of the filter membrane between the ends of the filter characterized in that the filter membrane bundle is fixed by resin casting in two steps en with two different grades of fastening resin through casting tubes connected to the side joints of the filter module housing, the first step of which is to rotate the filter module centrally arranged relative to the axis of rotation (Y) at a centripetal acceleration of 10-100 g (g = 9.81 m / sec ² ) a first type of synthetic resin having a viscosity of 8 to 10 Pa.s and a bonding time of 5 to 40 minutes is applied to the ends of the filter module housing, and the filter module housing is rotated at a constant angular speed up to 10-30% of the forming a closure with a surface perpendicular to the longitudinal axis of the membranes, and then, in the second step, a second type of filter membrane bundle is formed through the side joint at the desired pouring angle (? 90 °), finally, after completion of the second step and removal of the molds, the two ends of the filter membrane bundle protruding from the filter module housing are perpendicular to the longitudinal axis of the capillary membranes. cut. Method according to claim 1, characterized in that, in the second step, when the ends of the filter membrane bundle are poured with an pouring angle <90 °, the filter module housing is positioned and rotated with an eccentricity corresponding to the desired pouring angle with respect to the axis of rotation. Method according to claim 2, characterized in that, in the case of filter module housings with opposite side stubs, the second step of pouring the ends of the filter membrane bundle with a pour angle <90 ° is performed in two turns by reversing the connections of the casting tubes and A method according to claim 2, characterized in that, in the case of filter module housings having side flanks on the same side, the second step of casting the filter membrane bundle is carried out in one pass at the two ends of the filter module casing. The method according to claim 1, characterized in that in the second step of pouring the ends of the filter membrane bundle with a pouring angle of? 90, a plurality of, preferably three, filter module housings are arranged centrally above one another on planes of rotation. 6. Apparatus according to claims 1-5. A method according to any one of claims 1 to 6, wherein a legged cylindrical mantle with an opening window HU 209 743 Β is formed by a centrifuge with a rotating lower-drive bearing with a rotating lid, a rotatable housing for receiving filter module housings, resin storage vessels, and resin storage vessels having at least one flexible tubing (1) ) is designed for receiving in a single or multi-storey, central or eccentric arrangement, has an air inlet nozzle (14) and an air outlet nozzle (15), resin containers are formed as a resin storage box (8) with a horizontal partition (9) is provided with a variable speed drive motor (6).