UNIT FOR HEAT TREATMENT OF FIBROUS MATERIALS Russian patent published in 1994 - IPC

FIELD: production of chemical fibers. SUBSTANCE: unit comprises casing with zone heaters and graphite slotted working chamber provided with gates and pipe unions at inlet and outlet for sucking out used gaseous products and delivery of inert gas. Located under chamber is a preprocessing device in the form of a slotted duct with zone heater disposed centrally through unit length and having product discharge pipes at inlet and in the middle. Device for burning the gaseous products of pyrolysis is installed at a distance from the inlet of working chamber, said distance being equal to 60-75% of the entire chamber length. Said burning device is a combination of heated vertical and inclined pipes. Graphite slotted working chamber is made of graphite plates laid transversely with a gap therebetween which is 0.2 - 0.3 the plate thickness. EFFECT: improved functional and operating characteristics. 1 dwg