摘要
由于烧碱蒸发结晶中氯化钠的结晶是非常复杂的多相传热传质过程,能否使晶粒合理分布以过滤除去是氯碱工业提高产品质量的瓶颈。因此本文对四效逆流蒸发分布器中氯化钠结晶过程进行了研究,将多相流理论应用于氯化钠工业结晶过程,以微元衡算为基础,引入碰撞因子,建立了氯化钠湍流传质模型,并用工厂生产数据对模型进行了验证,结果与生产实际吻合较好。该模型不但可用来优化烧碱生产过程中氯化钠晶粒的分布,指导工业结晶生产,而且可直接预测晶体生长特性。
The crystallization of sodium chloride is a very complicated process in evaporative crystallization of caustic soda which including multi-phase heat and mass transfer. It is a bottle-neck to keep reasonable grain size in quality control of caustic soda production. Hence the crystallization process of sodium chloride is studied in a four-effect backward feed evaporate-crystal system by using the multiphase flow theory. The mathematical model of turbulent flow mass transfer was set up based on the infinitesimal element method by introducing the concept of collide factor. The calculated result from the established model fits in well with plant production data. Therefore the model not only can be applied in the operation optimization of caustic soda process, but also can forecast the characteristics of crystal growth directly.
出处
《计算机与应用化学》
CAS
CSCD
北大核心
2005年第11期985-988,共4页
Computers and Applied Chemistry
关键词
分布器
流
开孔率
传质
晶体
生长速率
distributor, turbulent flow, bore diameter, mass transfer, crystal, the linear growthrate
