Probleme bei der Filtration unter extremen Gas‐ und Staubbedingungen

Filtration problems under extreme conditions . Filtering separators belong to the high‐performance separators and their significance in dust extraction techniques is increasing. They are distinguished by offering almost any desired efficiency of separation which property, on use of appropriate filter media, is also preserved under fluctuating working conditions with regard to dust content in the crude gas, size of the dust particles to be separated, and the rate of gas flow. In order to exploit these advantages also under extreme conditions of gas and dust attempts were made in recent years to extend the operating range by the development of new filter media. Among the applications deserving mention are the fly‐ash collection in coal‐fired power plants and the dust separation under high temperatures for new power technologies. The present state of the art and experience gained so far are presented.