聚四氟乙烯在烧碱蒸发器防、除垢中应用的研究  

Studies on application of poly(tetrafluoroethylene) in preventing and removing scale from caustic soda evaporators

作　　者：马红钦[1] 朱慧铭[1] 谭欣[1] 张晓军[2] 

机构地区：[1]天津大学化工学院,天津300072 [2]江苏安邦电化有限公司,江苏淮阴223002

出　　处：《氯碱工业》2002年第6期21-24,共4页Chlor-Alkali Industry

摘　　要：烧碱液蒸发器加热表面存在严重的结垢现象 ,将聚四氟乙烯颗粒引入到蒸发器中采用流化床传热 ,聚四氟乙烯固体颗粒能完全防止结垢的产生 ,但只能清除已有的部分垢层。不经淬火处理的聚四氟乙烯颗粒 ,防垢、除垢效果较好 ,但耐磨性能差 ,10周后磨损率达 2 2 % ;经淬火处理后 ,聚四氟乙烯颗粒的防垢、除垢性能略有下降 ,但耐磨能力得到很大提高 ,连续运行 10周 ,磨损率不超过 3% 。A large quantity of scale exists on heat surfaces of evaporators of caustic soda liquor(saturated sodium chloride electrolyte).Although feeding poly(tetrafluoroethylene) particles into an evaporator and heat-transferring by a fluidized bed can fully prevent scale formation,only partial formed scale can be removed.The poly(tetrafluoroethylene) particles untreated with quenching showed poor abrasion performance with 22% wear rate after 10 weeks,despite better scale-preventing and scale-removing performance.Although the scale-preventing and scale-removing performance of quenched poly(tetrafluoroethylene) particles decreased slightly,their abration performance improved greatly and the wear rate is no more than 3% after 10 weeks nonstop running.So they could be used as inert solid anti- scaling particles.

关 键 词：聚四氟乙烯 烧碱 蒸发器 应用 研究 除垢 结垢 流化床传热 

分 类 号：TQ114.268[化学工程—无机化工]