Seitz-filter-werke Gmbh Und Co.

Pall Corporation

Seitz-filter-werke Theo & Geo Seitz Gmbh Und Co.

Wolfgang Hepp

Gerhard Strohm

Georg Schnieder

Massoud Karbachsch

Wilfried Kaul

Herbert Radmacher

Paul Duckek

Paul Duchek

The invention relates to a filtration device for deep-bed filtration which is easier to handle and enables filter modules(s) to be changed and disposed of easily. The filtration device has a casing with at least one filter module inserted in the casing with filter elements made from deep-bed filter materials stacked on top of each other. The filter elements have at least one internal structure formed by a perforation wherein the boundary surface of the perforation formed by the deep-bed filter materials creates a through-flow surface for filtrates or non-filtrates. At least one end plate has at least one inlet and/or outlet.

Filtration device with stacked deep-bed filter elements

A process is described for filtration of fluids, particularly of heterodisperse fluids like beer, in which a cleaning cycle of the MF modules is always carried out when the transmembrane pressure exceeds a pre-set pressure which has been selected to be equal to the optimal trans-membrane pressure for the particular fluid to be filtered as regards its analytical appearance. In beer filtration this value is preferably set at 1.5 bar. The microfiltration facility is equipped with numerous MF modules 5, arrayed in series and parallel; with a device for cleansing the MF modules 5; and with a measuring device 3 for recording trans-membrane pressure, attached to a control device 7, which, upon attaining the pre-set trans-membrane pressure, interrupts the filtration process and starts a cleansing cycle going.

Procedure and device for filtration of fluids using MF modules

A process is described for filtration of fluids, particularly of beverages like beer, utilizing microfiltration membrane modules operated in alternating filtering cycles and cleansing cycles, in which the cleansing cycles are always carried out when the transmembrane pressure exceeds a pre-set pressure which has been set to equal to the optimum trans-membrane pressure for the particular fluid being filtered, based on an analysis of the fluid after it has been filtered. In beer filteration, this value is preferably set at 1.5 bar. The microfiltration facility is equipped with numerous MF modules, arrayed in series and parallel; with a device for cleansing the MF modules and a measuring device for recording trans-membrane pressure that is attached to a control device which, upon attaining the pre-set trans-membrane pressure, interrupts the filtering cycle and starts a cleansing cycle.

Procedure for filtration of fluids using MF modules

A module for crossflow filtration, a method of making same, and a filtration device that accommodates at least one such module, which includes at least two multilayer filter units which are stacked on top of one another and are separated from one another by a respective spacer, with the module having at least one channel for unfiltered material and at least one filtrate channel that connects the filter units. The module further includes a sealing material ring for sealingly interconnecting peripheral portions of the filter units, with at least one edge section of the filter units being spaced from the sealing material ring to form the channels for unfiltered material. The layers of each individual filter unit are fused together at least at edge sections that are not embedded in the sealing material ring which, at edge sections of the filter units that are embedded therein, has a width that is sufficient to completely accommodate the filtrate channels.

Method of producing a filtration module for separating and filtering

A module for crossflow filtration, a method of making same, and a filtration device that accommodates at least one such module, which includes at least two multilayer filter units which are stacked on top of one another and are separated from one another by a respective spacer, with the module having at least one channel for unfiltered material and at least one filtrate channel that connects the filter units. The module further comprises a sealing material ring for sealingly interconnecting peripheral portions of the filter units, with at least one edge section of the filter units being spaced from the sealing material ring to form the channels for unfiltered material. The layers of each individual filter unit are fused together at least at edge sections that are not embedded in the sealing material ring which, at edge sections of the filter units that are embedded therein, has a width that is sufficient to completely accommodate the filtrate channels.

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Alzey, Germany

Wolfgang Hepp