Optimization Design for DTB Industrial （优化设计的防晒霜工业）.pdf

Optimization Design for DTB Industrial Crystallizer of Potassium Chloride ∗ Xingfu Song , Menghua Zhang, Jin Wang, Ping Li, Jianguo Yu National Engineering Research Center for Integrated Utilization of Salt Lake Resources, State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China Summary CFD model for the simulation of DTB industrial crystallizer was developed. The crystal size distribution and the coefficient of variation of crystal product were studied by CFD simulation of two phase flow model. The impeller shapes and various operating conditions are optimized, to reduce the energy consumption of the crystallization process and to increase the KCl product quality. Based on CFD optimization design, a new impeller was retrofitted into an existing DTB crystallizer with the productivity of 100000 tones KCl/year at Qinghai salt lake plant of china, and its performance was evaluated against data collected using the original impeller. Keywords: DTB crystallizer, CFD, Multiphase flow, Optimization design Introduction Some pioneering studies have been done very well to combination of a classifier and a crystallizer with mixed understand the thermodynamics, kinetics and processes of suspension, mixed particle removal unit. carnallite dissolution and KCl crystallization, but little In this work, CFD model has been developed for an work has been done to study the influence of existing DTB industrial crystallizer