废旧冰箱混合塑料静电分选关键参数影响研究  

Study on Electrostatic Separation Process of Mixed Plastics from Waste Refrigerators

作　　者：吕怀兴 秦玉飞 詹路 牛远航 许振明[2] LYU Huaixing;QIN Yufei;ZHAN Lu;NIU Yuanhang;XU Zhenming(Jiangxi Green Recycling Co,Ltd,Yichun 331100,China;School of Environmental Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]江西格林循环产业股份有限公司,江西宜春331100 [2]上海交通大学环境科学与工程学院,上海200240

出　　处：《中国塑料》2021年第8期131-135,共5页China Plastics

摘　　要：采用废旧冰箱整体破碎分选得到的混合塑料破碎料作为原料,利用自由落体式静电分离机进行处理后得到丙烯腈‐丁二烯‐苯乙烯共聚物(ABS)、高抗冲聚苯乙烯(PS‐HI)两种废塑料破碎料,通过缺口冲击强度、拉伸强度、分选效率等测试研究了原料预处理与静电分离机工艺等多个关键参数对分选效果的影响。结果表明,控制较低的混合塑料破碎料含水率可以明显提高静电分选的效率和产物性能;静电分选场电压在27 kV时,喂料速度在550 r/min时可以达到最佳的分选效率和产物性能;静电分离机极间距在200和220 mm左右时可以分别达到ABS和PS‐HI的最佳分选效率和力学性能。A mixed plastic crushing material obtained from waste refrigerators was sorted to ABS and PS‐HI waste plas‐tics by free falling electrostatic separator.The effects of raw material pretreatment and electrostatic separator process on separation efficiency were studied through notched impact strength,tensile strength and separation efficiency.The re‐sults indicated that the efficiency of electrostatic separation and the properties of products were improved obviously through controlling the lower moisture content of mixed plastics.The optimal separation efficiency and product perfor‐mance were achieved at a voltage of electrostatic separation field of 27 kV and a feeding speed if 550 r/min.The highest separation efficiency of ABS and PS‐HI along with the best mechanical properties was achieved with electrostatic separa‐tor distances of about 200 and 220 mm,respectively.

关 键 词：废旧冰箱 混合塑料 静电分选 分选效率 

分 类 号：TQ317.9[化学工程—高聚物工业]