Gel potting method for producing filtering hollow fibre...

B - Operations – Transporting – 01 – D

Patent

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B01D 63/02 (2006.01)

Patent

CA 2377814

To pot membranes in a header, a dense, viscous liquid, suspension or, preferably, a thixotropic, water soluble gel (30), is placed in a header pan in space reserved for a permeate channel. A plurality of hollow fibre membranes (10) are collected together and their open ends are inserted into the gel. A fixing liquid, typically a resin (14), is placed over the gel (30). The fixing liquid (14) surrounds each membrane (10) and then solidifies, simultaneously sealing the outer surfaces of the membranes and forming a plug in the opening of the header to complete the permeate channel. After the fixing liquid has solidified, the gel (30) is removed by various means. The space initially occupied by the gel becomes part of the permeate channel after the gel is removed. In one embodiment, membranes are grouped by a cushioning adhesive which later surrounds the membranes where they exit the completed header.

Selon l'invention, afin d'enrober des membranes dans une tête, on place une suspension, liquide visqueuse, dense, ou, de préférence, un gel soluble a l'eau (30), thixotrope dans un moule à tête dans l'espace réservé à un canal de perméat. Plusieurs membranes à fibres creuses (10) sont rassemblées et leur extrémité ouverte est insérée dans le gel. Un liquide de fixation, classiquement une résine (14), est placé sur le gel (30). Le liquide de fixation entoure chaque membrane, puis se solidifie, rendant étanches les surfaces extérieures des membranes et formant un bouchon à l'ouverture de la tête afin de compléter le canal de perméat. Après solidification du liquide de fixation, le gel (30) est éliminé par différents moyens. L'espace initialement occupé par le gel devient, après élimination du gel, une partie du canal de perméat. Dans une réalisation, des membranes sont groupées au moyen d'un adhésif de calage qui entoure plus tard les membranes lorsqu'elles sortent de la tête terminée.

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