HEAT TREATMENT FURNACE, AND METHOD OF MANUFACTURING FLAME RESISTANT FIBER BUNDLE AND CARBON FIBER

• Main Authors: TSUKAMOTO MASATOSHI, HAMABE YUSUKE, OZAKI MITSUTOSHI
• Format: Patent
• Language: English
• Published: 07.10.2010
• Subjects: APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS; BLASTING; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS; DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE; FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR; FURNACES; FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; HEATING; KILNS; LAUNDERING; LIGHTING; MECHANICAL ENGINEERING; NATURAL OR ARTIFICIAL THREADS OR FIBRES; OPEN SINTERING OR LIKE APPARATUS; OVENS; RETORTS; SPINNING; TEXTILES; TREATMENT OF TEXTILES OR THE LIKE; TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS,FABRICS, FEATHERS, OR FIBROUS GOODS MADE FROM SUCH MATERIALS; WEAPONS

PROBLEM TO BE SOLVED: To provide an inexpensive and ecologically-friendly heat treatment furnace for making a polyacrylonitrile fiber bundle resistant to flame, a method of manufacturing flame resistant fibers and a method of manufacturing carbon fibers. SOLUTION: A furnace body is structured of: a heat treatment chamber having a hot air introduction part for blowing hot air in a direction intersecting with the traveling direction of a treated object and a hot air discharge part for discharging the hot air; a seal chamber having a hot air circulation mechanism in the direction intersecting with the traveling direction of the treated object; and a seal exhaust chamber having a discharge part for discharging indoor gas and a discharge means for discharging the gas to an exhaust gas treatment facility. The hot air discharge part and hot air introduction part of the heat treatment chamber are interconnected by a hot air circulation path including a heating means and an air blowing means. The heat treatment furnace has a branch path branched to the exhaust gas treatment facility and a branch path for introducing fresh hot air in the middle of the hot air circulation path, and also has a branch path for returning at least part of gas discharged from the discharge part of the seal exhaust chamber, which is connected to the hot air circulation path or the branch path introducing fresh hot air. COPYRIGHT: (C)2011,JPO&INPIT