System and method for improving pre-oxidation carbonization efficiency of polyacrylonitrile-based carbon fiber precursor

• Main Authors: KANG WANPING, WANG HONGLI, LYU JIANGUO, JI JINTAO, ZHAO SHENGYAO, LIU YAYUN, ZHU BO, WANG JINSHU
• Format: Patent
• Language: Chinese; English
• Published: 11.11.2022
• Subjects: APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR; LAUNDERING; NATURAL OR ARTIFICIAL THREADS OR FIBRES; 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

The invention discloses a system and a method for improving pre-oxidation carbonization efficiency of polyacrylonitrile-based carbon fiber precursors. The system is sequentially provided with a filament unwinding machine, a filament guide frame, a tension adjusting wheel, a self-shielding electron accelerating device, a pre-oxidation furnace, a low-carbon furnace, a high-carbon furnace, a drying furnace and a filament winding machine according to working procedures. The self-shielding electron acceleration device comprises a shielding body, a high-voltage generator, an electron gun, an electron accelerator and a beam extraction structure, the shielding body is a double-layer shielding shell, and the electron accelerator is fixedly arranged on an inner-layer shielding shell; the high-voltage generator is connected with an inlet end of the electron accelerator through the electron gun, an outlet of the electron accelerator is connected with an inlet end of the beam extraction structure, and an outlet end of the