偏氟乙烯乳液聚合的气液传质效果影响因素的研究  

Study on characteristics of gas-liquid mass transfer in vinylidene fluoride emulsion polymerization reactor

作　　者：朱友良[1] 郑秀莲[2] 

机构地区：[1]衢州学院化学与制药工程系,浙江衢州324006 [2]衢州学院信息与电子工程系,浙江衢州324006

出　　处：《化学工程师》2005年第6期11-13,40,共4页Chemical Engineer

摘　　要：首先推导出表征气液传质效果的K值计算方法,借此研究了聚合釜装填量、搅拌桨型和转速等因素对气液传质效果的影响,结果表明:随着聚合釜装填量和搅拌转速的增大,K值增大,气液传质效果提高;在搅拌转速大于500r·min-1情况下,桨型采用上层二叶平桨、下层二叶斜桨的方式明显比单层的二叶斜桨或二叶平桨的K值大,气液传质效果好。确定了5L釜偏氟乙烯(VDF)乳液聚合必需的良好搅拌效果的条件:装填量3L、搅拌转速700r·min-1、桨型采用上层二叶平桨和下层二叶斜桨;VDF聚合速度达到了115gPVDF·(L·h)-1,合成出固含量20wt%、粒径分布窄、稳定性好的聚偏氟乙烯(PVDF)乳液。The measurement method of K value indicating gas-liquid mass transfer effects was carried out.The effects of type, speed of agitator,liquid volume on the K value were investigated, and the optimum condition for vinylidene fluoride emulsion polymerization in the 5L reactor was carried out:liquid volume 3L, agitation speed 700 r·min^(-1) and combining agitator,and so the vinylidene fluoride emulsion polymerization speed 115g PVDF·(L·h)^(-1),latex content 20wt% and sharp particle diameter distribution were then obtained.

关 键 词：传质效果 乳液聚合 气液 搅拌转速 聚偏氟乙烯 装填量 计算方法 搅拌效果 聚合速度 粒径分布 聚合釜 K值 桨型 VDF 固含量 稳定性 增大 上层 

分 类 号：TQ021.4[化学工程] TQ316.334