十水硫酸钠冷冻结晶器的设计与优化  

Design and optimation of chiller-crystallizer of sodium sulfate decahydrate

作　　者：张爱群[1] 杨立斌[1] 郑倩倩[1] 

机构地区：[1]天津科技大学海洋科学与工程学院,天津300457

出　　处：《无机盐工业》2010年第5期56-58,61,共4页Inorganic Chemicals Industry

基　　金：天津科技大学科学研究基金资助项目(20080211)

摘　　要：通过对十水硫酸钠结晶过程影响因素的分析,讨论了冷却结晶过程设计的关键点。分析了过饱和度对结晶过程初级成核的影响,研究了通过控制物料母液循环量从而控制过饱和度以避免初级成核的方法;探讨了通过改进设备内部结构,使晶核处于悬浮状态,与过饱和液体充分混合,达到促进晶体生长的目的;新的设备结构设计,还充分考虑减少晶体二次成核几率;同时在结晶器中增加细晶排出装置,降低晶核数量,提高晶体生长速率,达到改善结晶质量的目的。Key points in the design for the process of freezing crystallization were discussed by analyzing influencing factors.In addition,influence of supersaturation on primary nucleation in crystallization process was analyzed and method that through controlling circulation rate of mother liquid to control the supersaturation so as to avoid primary nucleation was studied.Internal structure of chiller-crystallizer was improved so that crystal nucleus could become the suspension state and mix with supersaturation solution completely in crystallizer and finally achieve the purpose of promoting growth of crystal.New equipment design also fully considered how to reduce the probability of crystal secondary nucleation.Meanwhile,fine crystal discharge device was added in crystallizer to decline quantity of crystal nucleus and to increase crystal growth rate so as to reach the aim of improving crystalline quality.

关 键 词：结晶器 十水硫酸钠 芒硝 

分 类 号：TQ131.12[化学工程—无机化工]