School of Metallurgical Science and Engineering, Central South University, Changsha 410083, People's Republic of China.
Environ Technol. 2014 Jan-Feb;35(1-4):82-8. doi: 10.1080/09593330.2013.811542.
Crystallization process in a fluidized bed reactor (FBR) has been regarded as an environmentally friendly technology for the removal and recovery of fluoride from industrial wastewater. The growth kinetics of calcium fluoride at high supersaturation was studied for design, control, and operation of an FBR. The main variables, including supersaturation, superficial velocity, pH value, and particle size of seed that influenced the crystal growth were investigated. Then, a growth model was used to predict the linear growth rate of calcium fluoride at a high influent concentration of fluoride. The pressure difference in the FBR was used as a feature to characterize the growth rate of calcium fluoride. The aggregation and adsorption between seeds and fine particles were proven to be a possible mechanism for growth of calcium fluoride.
在流化床反应器（FBR）中的结晶过程被认为是一种从工业废水中去除和回收氟化物的环保技术。为了设计、控制和操作 FBR，研究了高过饱和度下氟化钙的生长动力学。考察了影响晶体生长的主要变量，包括过饱和度、表观速度、pH 值和种子粒径。然后，使用生长模型预测了在高氟化物入口浓度下氟化钙的线性生长速率。FBR 中的压差被用作特征来描述氟化钙的生长速率。证明了种子和细颗粒之间的聚集和吸附是氟化钙生长的一种可能机制。
