旋流流化床中氯化钠蒸发结晶特性研究  

Characteristics research of sodium chloride evaporation crystallization process in swirling fluidized bed

作　　者：王平[1] 彭芹[1] 叶世超[1] 夏婷[1] 

机构地区：[1]四川大学化学工程学院,四川成都610065

出　　处：《现代化工》2016年第5期151-153,155,共4页Modern Chemical Industry

摘　　要：以新型旋流流化床为结晶装置,考察了蒸发温度、蒸发时间、晶种量、晶种粒径、母液循环流量对氯化钠蒸发结晶速率、平均粒径和粒径分布的影响。结果表明,随着蒸发温度、蒸发时间、母液循环流量增大,氯化钠结晶速率增加,产品平均粒径增大;晶种量增加,结晶速率降低,产品平均粒径减小;晶种粒径对结晶速率影响呈微降趋势。在蒸发温度为60℃,晶种质量分数为1%,时间为2 h,母液循环流量为39.72 L/h的条件下,晶种粒径为525μm时,产品平均粒径为752μm。With a new swirling fluidized bed as the crystallization device,the impacts of evaporation temperature,evaporation time,circulation flow rate,the amount of crystal seeds and the sizes of crystal seed on evaporation crystallization rate of sodium chloride,average size and average size distribution of crystallization product are studied. The results show that increasing the evaporation temperature,crystallization time and circulation flow rate leads to the increase in crystallization rate and average size of crystallization product. The crystallization rate and average size of crystallization product decrease with the increase of the amount of crystal seeds. At the same time,the increase of the size of crystal seed results in the slight decrease of crystallization rate. The average particle diameter of crystallization product is 772 μm under the following conditions： 60℃ of the evaporation temperature,39. 72 L / h of the circulation flow rate,2 hours of the evaporation time,1% mass fraction of crystal seed,525 μm of an average seed particle size.

关 键 词：氯化钠 旋流流化床 结晶 平均粒径 

分 类 号：TQ115[化学工程—无机化工]