摘要
针对碳纤维纺丝过程中放料产生的废聚丙烯腈(PAN)溶液含有高浓度二甲基亚砜(DMSO)的问题,采用“稀释-凝固-分离”工艺回收DMSO,探讨了喷料孔规格、废PAN溶液浓度、凝固剂浓度及设备运行参数对DMSO回收率(R_(DMSO))及系统运行稳定性的影响。结果表明:选用单孔、孔径为5.2 mm的喷料孔,可防止系统管路堵塞;将废PAN溶液稀释至PAN质量分数为15%,采用DMSO质量分数为5%的水溶液作为凝固剂,控制固液分离机挤出压力0.4 MPa、离心泵转速1400 r/min,R_(DMSO)达85.5%,且回收系统运行稳定;该回收工艺可实现废PAN溶液中DMSO的高效回收与系统稳定运行,能够便于后续DMSO的纯化再利用。
In carbon fiber spinning process,the discharged waste polyacrylonitrile(PAN)solution contains a high concentration of dimethyl sulfoxide(DMSO).A“dilution-coagulation-separation”process was employed to recover DMSO from the waste PAN solution.The effects of spray nozzle orifice specifications,waste PAN solution concentration,coagulant concentration,and operating parameters on the DMSO recovery rate(R_(DMSO))and system operating stability were investigated.The results showed that the use of a single-orifice spray nozzle with an orifice diameter of 5.2 mm effectively prevented pipeline blockage;when the waste PAN solution was diluted to a PAN mass fraction of 15%,an aqueous solution with a DMSO mass fraction of 5%was used as the coagulant,and the extrusion pressure of the solid-liquid separator and the rotational speed of the centrifugal pump were controlled at 0.4 MPa and 1400 r/min,respectively,an R_(DMSO)of 85.5%was achieved with stable system operation;and this recovery process enables efficient recovery of DMSO from waste PAN solutions and stable operation of the recovery system,which is beneficial for subsequent purification and reuse of DMSO.
作者
韩笑笑
张发
HAN Xiaoxiao;ZHANG Fa(Shanxi Gangke Carbon Materials Co.,Ltd.,Taiyuan 030100)
出处
《合成纤维工业》
2026年第1期96-99,共4页
China Synthetic Fiber Industry
关键词
碳纤维
聚丙烯腈废液
二甲基亚砜
回收工艺
回收率
carbon fiber
waste polyacrylonitrile solution
dimethyl sulfoxide
recovery process
recovery rate
