赤泥沉降槽固液分离数值仿真技术的研究进展及现状

Research Progress and Present Situation of Solid-liquid Separation Numerical Simulation Technology of Red Mud Thickener

赤泥沉降槽内固液分离过程的数值仿真研究对沉降槽的高效化生产运行、经济化管理和设计具有重要作用。本文主要阐述了近十几年来国内外学者和专家运用计算流体力学方法并结合商业化计算软件在沉降槽中心桶结构、絮凝剂吸附和耙机设计,以及耦合群体平衡模型(PBM)计算等方面取得的一些重要科研成果,揭示了赤泥沉降槽固液分离计算模型和计算方法的发展历程;针对国内外沉降槽固液分离仿真计算的研究现状,以及固液分离沉降设备亟待解决的问题,展望了沉降槽固液分离数值仿真计算的发展前景,提出未来研究需要更合理、适用性更强的絮凝剂吸附模型,来对沉降槽进行仿真优化计算;最后指出今后沉降槽的发展和研究方向是高分子絮凝剂和沉降槽结构的研究,数值仿真技术仍然是赤泥沉降槽固液分离研究的主要方法和手段,特别是多相流颗粒群体平衡物理场耦合计算。

The numerical simulation study on solid-liquid separation process of red mud thickener is im- portance to high-efficiency production operation, economic management and design of red mud thickener. Some important scientific and research achievements in center bucket structure of red mud thickener, floeculant adsorption, scraper design and calculation of coupling population balance model with computa- tional fluid mechanics method and commercial calculation software adopted by experts and scholars at home and abroad in recent ten years were introduced. The development process of calculation method and calculation model of solid-liquid separation of red mud thickener was presented. In view of the study sta- tus of solid-liquid separation numerical simulation calculation of red mud thickener at home and abroad, and the problems that should be solved quickly existing in solid-liquid separation precipitation equip-ments, a vision of development prospects of solid-liquid separation numerical simulation calculation of red mud thickener was performed, and in the future, it needs more reasonable, more adaptable flocculant ad- sorption models to carry out simulation optimization calculation of red mud thickener, which was put for- ward. At the end, the future development and study trends of red mud thickener is macromolecule floccu- lant and sedimentation tank structure, the numerical simulation technology is still the main method and way for solid-liquid separation study of red mud thickener, especially for coupling calculation of popula- tion balance physical field of multiphase flow particle