Hydac Process Technology Gmbh

Jörg Hermann Gerstner

Ralf Wnuk

Bernhard Schlichter

Thomas Morawietz

Markus Olschok

Manfred Deutschmeyer

Thomas Böttcher

Albert Kaints

Thomas Bottcher

Dimitri Bugrov

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 filtering apparatus has filtering elements () in a filter housing (), a filter inlet () and a filter outlet (). During filtration, one of the filter elements () can be back-flushed by a back-flushing device (), having a pressure control device (). The pressure control device has a hydraulic accumulator (), with a fluid chamber () fillable during filtration with clean fluid and connectable for back-flushing via a back-flushing guide () to the clean side () of the filtering element () to be cleaned. For back-flushing, a further fluid chamber () of the hydraulic accumulator () is subjected to gas pressure. By resultant movement of a separator () of the hydraulic accumulator (), the filling amount of the clean fluid is dispensed for the back-flushing.

Filtering apparatus

A filter device includes at least one filter housing () in which at least one filter element () is arranged. Inside the filter housing (), the filter element separates a clean side () from an untreated side (). On the clean side () of the filter housing () at least one storage unit () having at least one movable separating element () is connected. The separating element divides the storage unit () into two working chambers or pressure chambers () ().

A filtering apparatus has a plurality of filtering elements () in a filter housing (), a filter inlet () and a filter outlet (). During the filtration operation, one of the filtering elements () can be back-flushed by a back-flushing device (). The back-flushing device has a pressure control device () including a hydraulic accumulator (). One accumulator fluid chamber () can be filled during the filtration operation with a quantity of filtered fluid and can be connected for a back-flushing operation via a back-flushing guide () to the clean side () of the filtering clement () to be cleaned. Another accumulator fluid chamber () can be subjected to a media pressure.

A filter device operating method involves a plurality of filter elements () received in a filter housing having a filter inlet for a fluid to be filtered and a filter outlet for the filtered fluid. Flow through the filter elements () is possible in both directions for filtration or backwashing. Because the shut-off element () is a fast-closing plate valve () actuated by a hydraulic piston () and blocks the fluid connection so quickly, a feeding effect is created in the manner of a pressure blow on the backwashed filter element (). The feeding effect increases the cleaning of pollution on the filter element (), achieving an improved backwashing cleaning.

Filter device operating method

A filter device includes a plurality of filter elements () received in a filter housing having a filter inlet for a fluid to be filtered and a filter outlet for the filtered fluid. Flow through the filter elements () is possible in both directions for filtration or backwashing. Because the shut-off element () is a fast-closing plate valve () actuated by a hydraulic piston () and blocks the fluid connection so quickly, a feeding effect is created in the manner of a pressure blow on the backwashed filter element (). The feeding effect increases the cleaning of pollution on the filter element (), achieving an improved backwashing cleaning.

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Püttlingen, Germany

Jörg Hermann Gerstner