Abstract: The influences of temperature,supersaturated concentration and circulation flow rate on the average linear growth rate and the size distribution of ammonium sulfate crystal are studied in an experimental fluidized bed crystallizer.The results show that this process can prepare large particle ammonium sulfate crystals with main particle percentage exceeding 50%;the crystal growth rate increases with the increases of temperature,supersaturated concentration and circulation flow rate;the crystal growth rate is 6.59×10-8 m·s-1 under the following conditions:supersaturated concentration of 3.21 kg·m-3,temperature of 78℃ and circulation flow rate of 572 mL·min-1.When the convective mass transfer model is used to fit the experimental results,the relative deviation is within ±10%.
张建华, 叶世超, 段兰娟, 王平. 流化床中硫酸铵结晶生长特性实验研究[J]. 现代化工, 2018, 38(2): 170-172,174.
ZHANG Jian-hua, YE Shi-chao, DUAN Lan-juan, WANG Ping. Study on crystal growth characteristics of ammonium sulfate in fluidized bed. Modern Chemical Industry, 2018, 38(2): 170-172,174.
[1] 刘宝树,种悦晖,孙华,等.均一化大颗粒硫酸铵结晶高效制备工艺研究[J].无机盐工业,2017,49(6):77-80. [2] 王荣荣.硫酸铵间歇冷却结晶过程研究及晶体粒度与形态调控[D].上海:华东理工大学,2016. [3] 张建华,叶世超,曾贯虹,等.氨法脱硫中硫酸铵结晶过程影响因素的研究[J].广东化工,2016,43(11):3-5. [4] 殷萍.硫酸铵蒸发结晶过程研究[D].天津:天津大学,2007. [5] 徐欢欢,刘宝树,孙华,等.硫酸铵蒸发-冷却结晶工艺研究[J].无机盐工业,2012,44(6):14-16. [6] 王忠良,万雅曼,齐鸣斋.硫铵结晶热力学与动力学的实验研究[J].石油化工技术与经济,2014,30(3):11-14. [7] Chianese A,Diberardino F,Jones A G.On the effect of secondary nucleation on the crystal size distribution from a seeded batch crystallizer[J].Chemical Engineering Science,1993,48(3):551-560. [8] 章怡,李军,王盼.流化床中磷酸二氢钾结晶成核动力学研究[J].无机盐工业,2010,42(5):29-31. [9] 李俊宏,叶世超,程郡.等.旋流流化床结晶特性实验研究[J].现代化工,2015,35(3):139-142. [10] 王平,彭芹,叶世超,等.旋流流化床中氯化钠蒸发结晶特性研究[J].现代化工,2016,36(5):151-155. [11] Sattar Al-Jibbouri,Joachim Ulrich.The growth and dissolution of sodium chloride in a fluidized bed crystallizer[J].Journal of Crystal Growth,2002,234(1):237-246. [12] Binev D,Seidel-Morgenstern A,Lorenz H.Study of crystal size distributions in a fluidized bed crystallizer[J].Chemical Engineering Science,2014,133:116-124. [13] 丁绪淮,谈遒.工业结晶[M].北京:化学工业出版社,1985. [14] 陈涛,张国亮.化工传递过程基础[M].北京:化学工业出版社,2009.