Drive device for a membrane filtration arrangement

A membrane filtration device, comprising:

• a plurality of planar membrane filter elements combining to form a membrane package, the plurality of planar membrane filter elements rigidly fixed to a wall of the membrane package, the wall enclosing the membrane package on all sides, wherein the plurality of planar membrane filter elements are disposed within the membrane package parallel to and spaced apart from one another and each planar membrane filter element being oriented in a horizontal plane;
• at least one inlet chamber within the wall connected to at least one inlet opening for feeding a fluid to be filtered upstream from the membrane filter elements, and at least one outlet chamber connected to at least one outlet opening for discharging a filtered fluid portion produced by filtration downstream from the membrane filter elements;
• a frame surrounding the membrane package and connected to the wall of the membrane package by a plurality of springs whose main direction of spring action extends parallel to the plane of the membrane filter, the frame comprising an open structure which is not fluid tight;
• an oscillation unit directly connected to the frame only and indirectly connected to the wall through the plurality of springs to oscillate the membrane package and the wall in a direction parallel to the planar membrane filter elements;
• and
• the plurality of springs extending parallel to the plane of the membrane filter elements, the plurality of springs being connected at a first end to the wall of the membrane package and at a second end to the frame, the plurality of springs being subdivided into at least a first set and a second set of springs, such that all the springs within each set of springs extend parallel to each other and that the direction of the springs in the first set of springs extend at an angle to the direction of the springs of the second set.