某电厂超滤膜断丝原因分析及处理  

Analysis and treatment of broken membrane of ultrafiltration membrane in a power plant

作　　者：叶青 张贺 欧阳丰 李强 姚之侃[3] 朱利平[5] 张林[3] 无 YE Qing;ZHANG He;OU Yang-feng;LI Qiang;YAO Zhi-kan;ZHU Li-ping;ZHANG Lin(Zhejiang Zheneng Shaoxing Binhai Generation Co.,Ltd.,Shaoxing 312073,China;Zhejiang Energy Group P&D Co.,Ltd.Hangzhou,Hangzhou 311100,China;College of Chemical and Biological Engineering at Zhejiang University,Hangzhou 311100,China;Engineering Research Center for New Industrial Water Resources of Zhejiang Province,Hangzhou 311100,China;Department of Polymer Science and Engineering,Zhejiang University,Hangzhou 311100,China)

机构地区：[1]浙江浙能绍兴滨海热电有限责任公司,绍兴312073 [2]浙江浙能技术研究院有限公司,杭州311121 [3]浙江大学化学工程与生物工程学院,杭州310027 [4]工业新水源技术浙江省工程研究中心,杭州311121 [5]浙江大学高分子科学与工程学系,杭州310027

出　　处：《能源工程》2021年第3期74-77,共4页Energy Engineering

摘　　要：某电厂超滤系统额定出力为2464 t/h,超滤膜为外压式中空纤维膜,膜材料为改性聚醚砜(PES),单支膜面积60 m^(2)。超滤系统运行4年后,出水浊度增加,SDI值超出反渗透系统进水要求,经现场对超滤膜进行检测发现断丝严重,已经造成反渗透保安过滤器更换频繁、反渗透系统周期制水量降低、化学清洗次数增加的后果。经分析,超滤膜断丝的原因主要为膜丝材质和反洗方式不匹配以及膜的衰减老化,建议更换断丝严重的超滤膜并定期进行断丝检测。The rated output of ultrafiltration system of a power plant was 2464t/h.ultrafiltration membrane was external pressure hollow fiber membrane,which was made of modified polyethersulfone(PES),whose single membrane area was 60 m^(2).After 4 years operation,the turbidity of effluent increased,and the SDI value exceeded the inlet water requirement of reverse osmosis system.It was found that the ultrafiltration membrane was serious broken on-site examination,which required frequent replacement of reverse osmosis security filter and yielded in reduction of periodic water production in reverse osmosis system,so times of chemical cleaning was increased.After analysis,the main reasons for the broken membrane of ultrafiltration membrane are the mismatch of the material and backwashing method of the membrane and the aging of the membrane.It was suggested that the seriously broken ultrafiltration membrane be replaced and regular check on membrane be conducted.

关 键 词：超滤 断丝检测 改性聚醚砜 化学清洗 

分 类 号：TK223.5[动力工程及工程热物理—动力机械及工程]