Koch Membrane Systems Gmbh

Stefan Schäfer

Klaus Vossenkaul

Dirk Volmering

Christoph Kullmann

Darren Lawrence

Andreas Kruse

A membrane module for an immersed operation has a fiber bundle of hollow fiber membranes which are cast into a headpiece and in immersed operation are surrounded by a liquid to be filtered. The module has a permeate collection chamber connected to the headpiece with an outlet for permeate draining from the interior of the hollow fiber membranes, and a gas supply having a pipe guided by the headpiece. The pipe terminates in the interior of the fiber bundle and has a gas outlet for a gaseous medium, which after the transfer from the pipe to the liquid to be filtered rises as bubbles between the hollow fiber membranes. The fiber bundle is divided into sections and free spaces remain between the sections which extend from the pipe to the outer circumference of the headpiece and promote an inflow of the liquid into a foot area adjoining the headpiece.

Membrane module for immersed operation

The invention relates to a membrane filter unit for liquid or gaseous media, comprising a bundle of capillary membranes which are open on at least one front surface side and which are cast in an area which is close to the end of the open membrane ends, in a sealing layer forming a hardened head part. The open membrane ends protrude on the outer side of the sealing layer. The sealing layer is arranged on a spacer element which has a layer which is penetrated by the capillary membranes and which is non-permeable in relation to the casting material which hardens in order to form the sealing layer. The invention also relates to a method for the production of a membrane filter unit.

Membrane filter unit and method for the production of the membrane filter unit

The invention relates to a membrane filter for operating while submerged, with a frame (), which can be lowered into the liquid to be purified, and with modules () adjacently arranged in a row. The modules () each have a base element () with a permeate collecting chamber (), tubes () for a fluid that are connected to both ends of the base element (), and with hollow fiber membranes () that, with an open end, are embedded in the base element (). The hollow fiber membranes () are closed at their other end and terminate inside the liquid to be purified without being fixed whereby being able to freely move. The tubes () are vertically oriented and, at the top, are connected to a collecting line. Fiber holding devices () for laterally guiding the hollow fiber membrane () are fastened to the tubes (). According to the invention, the fiber holding devices () are provided in the form of U-shaped brackets that have a web () and limbs (), which are located at the ends of the web and can be fastened to the tubes (), and these brackets surround the hollow fiber membranes () of a module () on one side in the longitudinal direction and, due to a correspondingly large dimensioned limb length, also surround the membranes at the ends in front of the tubes ().

Hollow fiber membrane filter with a supporting structure

The invention relates to a method for producing fabric-reinforced capillary membranes, particularly for ultrafiltration, in which a fabric tube () is coated with a polymer solution and is guided through a precipitation bath (), where the polymer solution is converted into a microporous layer in the precipitation bath (), and a membrane that is reinforced by the fabric tube is formed. According to the invention, the fabric tube coated with the polymer solution passes through the precipitation bath () from top to bottom, without mechanical contact, and exits through a nozzle () at the bottom. Liquid flows out of the nozzle (), which liquid exerts a tensile force stabilizing the course of the coated fabric tube, on the capillary membrane () leaving the precipitation bath.

Method for producing fabric-reinforced capillary membranes, in particular for ultrafiltration

The invention relates to a membrane filter for water treatment, comprising a head piece including a permeate collecting chamber with a permeate outlet, and at least one fiber bundle made from capillary membranes, which are secured into the head piece with an end that is open towards the permeate collecting chamber and sealed on the opposite end thereof. The head piece contains an air duct to which the mouth piece that protrudes into the fiber bundle is connected with at least one air outlet. At its other end, the fiber bundle terminates in freely movable manner in the untreated water.

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Aachen, Germany

Stefan Schäfer