Membrane plate and filter element

A filter unit (10), in particular for a water filter of a water treatment- or sewage treatment plant, comprising several permanently connected membrane plates, the membrane plates comprising discharge shafts (2) opening outwardly on a longitudinal edge for the removing of permeate collected in the membrane plate (1),

• in which at least first and second membrane plates (1) are arranged parallel to one another and wherein at least one distance piece (9a) is arranged between a first and a second membrane plate (1) and wherein a first welding zone between the discharge shafts (2) of the at least two membrane plates (1) comprises the first distance piece (9a) and a liquid-tight connection between the first membrane plate (1) and the first distance piece (9a) and a liquid-tight connection between the first distance piece (9a) and the second membrane plate (1), and wherein the first welding zone extends longitudinally to intersect a second welding zone that surrounds the group of discharge shafts,
• wherein the membrane plates (1) and distance piece (9a) are manufactured out of thermoplastic material and the liquid-tight connections are weldments of the membrane plates (1) and distance piece (9a), and
• wherein a permeate collection channel (11) surrounds the discharge shafts of the at least two membrane plates and forms a liquid-tight seal around the peripheral welding edge (12) of the permeate collection channel in combination with the second welding zone surrounding the group of discharge shafts.

A filter unit (10), in particular for a water filter of a water treatment- or sewage treatment plant, comprising:

• at least first and second permanently connected membrane plates (1) arranged parallel to one another, each of the membrane plates comprising:
• a longitudinal end surface terminating at a first longitudinal border and a second longitudinal border;
• a discharge shaft (2) opening outwardly on the longitudinal end surface for the removal of permeate collected in the membrane plate (1), the discharge shaft being formed within the membrane plate and having one end even with the longitudinal end surface of the membrane plate (1),
• wherein at least in a first welding zone located at least between the first membrane plate discharge shaft (2) and the second membrane plate discharge shaft (2) on the second membrane plate, a liquid-tight connection is formed between the first and second membrane plates,
• wherein a permeate collection channel (11) surrounds the discharge shafts and is attached to the first and second permanently connected membrane plates at a second welding zone for collecting permeate discharged through the discharge shafts, and forms a liquid tight seal around a peripheral welding edge of the permeate collection channel in combination with the second welding zone,
• whereby the first border of the first membrane plate abutting the second border of the second membrane plate is sealingly connected to the second membrane plate in order to prevent water, that is disposed between the first and second membrane plates and has not passed through a membrane, from entering the collection channel.

A filter unit (10), in particular for a water filter of a water treatment- or sewage treatment plant, comprising:

• at least first and second membrane plates (1) arranged parallel to one another, each of the membrane plates comprising:
• a longitudinal end surface terminating at a first longitudinal border and a second longitudinal border;
• a discharge shaft (2) for the removal of permeate collected in the membrane plate (1), the discharge shaft being formed within the membrane plate and having one end opening outwardly and even with the longitudinal end surface of the membrane plate (1),
• at least one distance piece (9a) having a longitudinal end surface terminating at first and second longitudinal borders is arranged between the first and the second membrane plate (1) and wherein a first welding zone between the connecting elements (2) of the at least two membrane plates (1) comprises the first distance piece (9a) and a liquid-tight connection between the second border on the first membrane plate (1) and the first border on the first distance piece (9a) and a liquid-tight connection between the second border on the first distance piece (9a) and the first border on the second membrane plate (1),
• a permeate collection channel (11) surrounding the discharge shafts, forming a liquid tight seal around a peripheral edge of the permeate collection channel in combination with a second welding zone on the first and second membrane plates for collecting permeate discharged through the discharge shafts.