Importance

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Abstract

The present invention provides a method of operating a flushable filter column for a liquid. During the operation of a filter column, comprising several filter units, for a liquid, the filter units are flown through by the liquid in a forward direction in a filtering flow in the sense of filtering and in a flushing flow in reverse in the sense of reverse flushing. For each group of filter units, that can be blocked and reverse flushed together, a control valve, actuatable by its own electromagnet, is provided. The control valves are triggered in such a manner by an electronic control device depending on a state or operational parameter, which represent the degree of soiling of the filter unit, that the groups can be opened to the filtering flow or switched for blocking and reverse flushing. The reverse flushing is carried out in a flushing cycle, i.e. all filter units of the filter column are reverse flushed after one another, in succession.

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First Claim