Filter for cleaning hot gases

US4295868A · kind A · utility

Assignee

• Industrie-Wert Beteiligungsgesellschaft mbH · DE

Inventors

• Heinz Holter
• Heinz Gresch · Wickede (Ruhr), DE
• Heinrich Igelbuscher
• Kurt Hubner · Essen, DE
• Ekkehard Weber · Essen, DE

Key dates

• Filing date: Mar 9, 1979
• Grant date: Oct 20, 1981
• Expiry date: Mar 9, 1999

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D2273/20
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

In an apparatus for cleaning hot gases a filter housing has an inlet for unfiltered gas and an outlet for filtered gas. A plurality of filtered inserts are placed within the housing in a manner capable of filtering undesirable components from the gas feed stream. Each filter insert is made of a fibrous filter material. Silicic-acid glass fibers have a silicic acid content of at least 90%. Coated upon the fibers and absorbed into their pores is a metal oxide of aluminum, titanium, zirconium, cromium, nickle or cobalt. A honeycombed cage filled with high temperature resistant perlite is located within the housing between the gas inlet and the fiber inserts. The cage has an inlet and outlet external to the housing for replacing the perlite. A combustion chamber mounted in the housing has a discharge nozzle located so that the nozzle is directed at the filter inserts. Combusting materials in the chamber causes an explosive backflow of gases through the filter inserts.