DD219804A1 - METHOD FOR REMOVING A LUMEN FEEDER FROM HOLLOW FIBERS - Google Patents

Abstract

The invention relates to a method for removing a Lumenfuellers from hollow fibers, which are to be further processed later, z. B. bundles for Hohlfaserdialysatoren. With the invention, the cleaning of the hollow fibers is carried out in a continuous technological process without intermediate transport of the fiber to be treated and without negatively affecting the environment of the workplace and a later processing of the fiber in the dry state gewaehrleistet. This is achieved by the rolled-up hollow fibers are first subjected to a drying under gas supply by centrifuging a coarse cleaning, then at constantly running centrifuge with the addition of a Spülmediums an inner and outer fine rinsing and after discharge of the sputtering medium from the rotor space. As a solvent low-boiling media such as Fri-dohna, ethanol, trichlorethylene as drying gas, for example, filtered air or nitrogen can be used.

Description

Method for removing a lumen filler from hollow fibers International Patent Classification:

Field of application of the invention:

The invention relates to a method for removing a lumen filler made of hollow fibers, which are used for increased ultrafiltration application · In order to obtain the largest possible number of suitable pores in the fiber walls, a liquid, coagulationsinerter lumen filler is used in fiber production, which after completion of the hollow fibers must be removed again ·

Characteristic of the known technical solutions:

In industrial production, for which there are no publications, several wet fiber bundles enriched with lumen fillers are stored in a centrifuge and, by means of centrifugation, in a first process step of a grinder.

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cleaning subjected · It occurs most of the lumen filler from the FaserblindeIn from · Hack removing the fiber bundle of the centrifuge, the fiber bundles are in a second step, an intermediate purification, in the form of an immersion bath, subjected · - ->'is followed by embedding yet not completely cleaned, damp fiber bundles in a housing, which is followed by the third step in the manner that a final flushing of both the inner and the outer surfaces of the fiber bundle within the housing takes place. Finally, the bundle is dried in a stream of air. A disadvantage of this method is that emerges when winding the fiber bundles of the lumen filler and special machine-techni ere measures for collecting and discharging requires to protect winding machine and workplace from moisture. Also, when embedding the hollow fibers, the lumen filler leads to a considerable extent to leaks in the dialyzer. In addition, the disadvantage is the relatively great expense of · production time ·

Aim of the invention. ., '

The invention has a method to the target, with which the manufacturing moderately related lumen filler made of hollow fibers can be relatively inexpensively removed with a minimum investment in equipment and no large-personnel wall.

Explanation of the nature of the invention

The invention had the object of enabling the removal of a lumen filler of hollow fibers in a continuous technological process without intermediate transport of the fibers to be treated. Without affecting the environment of the workplace and a processing of the hollow fibers in the dry state and thus a completely dense embedding of the hollow fibers to ensure

 According to the invention the object is achieved in that the up- "

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Rolled hollow fibers are first subjected by centrifuging a coarse cleaning, subsequently, always with the centrifuge running, with the addition of a rinsing medium of an inner and outer finely rinsing and after discharge of the rinsing medium from the rotor chamber drying under gas supply, the coarse cleaning in a period of 30 to 90 minutes at one

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ner rotor speed between 500 min and 800 min, the Peinspülung with a low-boiling medium such as Tri-dohna, ethanol, trichlorethylene Tetra u · a · in a period of 15 minutes to 30 minutes at a rotor speed between 500 min and 800 min and the Drying with a gas in a period of 30 minutes to 60 minutes at a rotor speed

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be carried out between 500 min and 800 min, a "temperature between 323 ⁰ K and 353 ⁰ K and a relative humidity between 20 % and 50 % , filtered as drying gas air or nitrogen at a flow rate between 5 m-yh and 15 m / h Application · The supply of the gas begins after the flushing agent has been drained and takes place up to 50 minutes after the rotor has come to a standstill.

Embodiment:

The invention will be explained with reference to the following exemplary embodiment .

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The hollow fiber mat, wound by the manufacturer on a roll, is enriched with a lumen filler, both within and between its fibers, and between them. This chemical has a disturbing effect on the further processing of the hollow fibers, in particular when they are embedded, and must therefore be removed beforehand. First, the mat roll is inserted into the rotor space of the centrifuge, namely eccentrically. After the roll has been fixed, the rotor and with it the MattenrolJß brought to a speed of 800 min.

A treatment time of 60 minutes is the hollow cylinder portion of the mat roll on a Vorrich- not shown

a rinsing agent supplied, - and 's' s, until the. After completion of the filling, the previously closed side of the mat roll is slowly released, so that a gradual drainage of the rinsing agent takes place. After this, rinsing agent is again fed in the opposite direction at a speed of 500 min over a period of 20 minutes. With the completion of this rinsing, it is ensured that the rolled-up hollow fiber mat is free of residue from the lumen filler, both inside and outside · After the rinsing agent leaves the rotor chamber nitrogen is added at 323 ⁰ K and a relative humidity of 50% over a period of 60 minutes.

3, the nitrogen flow rate is 10 m / tu 30 minutes before the nitrogen supply is discontinued, the centrifuge is switched off and runs out slowly.

After standstill of the centrifuge, the mat roll is removed and can be fed to the further processing in the cleaned, dry state.

Claims (6)

Erfindungsanspruchj -1 -1 at a rotor speed between 500 min and 800 min, the purge in a period of 15 minutes to 30 minutes at a rotor speed between 500 min and 800, min, a temperature between 323 ⁰ K and 353 ⁰ K and a relative humidity between 20 ^K. % and 50 % are made · 1, method for removing a lumen filler of hollow fibers, using a flushing medium and a gas, characterized in that the hollow fibers, rolled up, first by centrifuging a rough cleaning, then, always while the centrifuge, with the addition of a flushing medium an inner and outer Fine rinsing and after draining the rinsing medium from the rotor chamber a drying under gas supply are subjected. , 2 Method according to item 1, characterized in that the coarse cleaning is carried out in a period of 30 minutes to 90 minutes. 3 · Method according to item 1 and 2, characterized in that a low-boiling liquid such as Fridohna, ethanol, trichlorethylene, tetra and the like is used as flushing medium. ^; V_ 4 «method according to item 1 and 2, characterized in that used for drying filtered air or nitrogen · 5 Method according to point 1 and 2, characterized in that a quantity of gas between 5 m ^ / h and 15 nr / h is introduced for drying in the rotor space. 6, method according to item 1, 2 and 5, characterized characterized,. that the supply of the gas begins after the removal of the mild detergent and is continued for up to 50 minutes after the rotor has stopped.