Hydac Process Technology Gmbh

Albert Kaints

Bernhard Schlichter

Ralf Wnuk

Manfred Deutschmeyer

Jörg Hermann Gerstner

Christian Gessner

A filter device has a filter housing () having a fluid inlet () for unfiltered matter and having a fluid outlet () for filtrate, and has at least one one-piece or multi-part filter insert () held in the filter housing (). Filter insert () can be cleaned using a backwash device () having at least one backwash element () in counter flow to the direction of filtration. The backwash element can be moved along the inside of the relevant filter insert () by a fluid-conveying drive shaft () of a rotary drive (). The individual backwash element () has, at the end adjacent to this inside, at least one gap-shaped passage opening, which extends in parallel to the axis of rotation of the drive shaft () and which opens into a flow chamber connected to the drive shaft () in a fluid-conveying manner. At least one further backwash device () has a further backwash element (). The fluid-conveying drive shaft () is divided into chambers () separated from each other. One backwash element () of one backwash device () is connected to one of the chambers (). The other backwash element () of the other backwash device () is connected to another chamber ().

Filter device

A filter device has a filter housing () having a fluid inlet () for unfiltered matter, a fluid outlet () for filtered matter and at least one filter element () of one or more parts accommodated in the filter housing (). The filter element can be cleaned using at least one backwash element () in counter current to the direction of filtration. The backwash element can be moved by a fluid-conveying drive shaft () of a rotary drive at the inside () of the relevant filter element (). At the end adjacent to this inside (), a gap-shaped passage opening is parallel to the axis of rotation () of the drive shaft () and opens into a flow chamber connected to the drive shaft () in a fluid-conveying manner. The distance between the backwash element () and the adjacent assignable filter element () can be predetermined by an adjustment device ().

Filter apparatus

A filter device has filter elements () received in a filter housing () with a filter inlet () and a filter outlet (). Flow passes through the filter elements () for a filtration or backwash in both directions. At least one filter element () performs the filtration. At least one other filter element (), for cleaning off its active filter surface, can be backwashed by a backwash appliance. For supporting the backwashing, the appliance contains a pressure control () having a pressure control element (). During a backwash operation, the fluid flow is controllable in a fluid connection between filter inlet () and the filter element () that is to be cleaned off. The fluid connection has a connection space () having element openings (), each of which can be connected to an open end of the filter cavity forming the unfiltered side of each filter element (). A fluid pathway () is provided via which, during the filtration, unfiltrate flows into the connection space (). By the pressure control element (), the flow of unfiltrate through the element opening () associated with the filter element () that is to be cleaned off can be controlled.

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Spiesen-Elversberg, Germany

Albert Kaints