College of Chemical Engineering and Technology, Taiyuan University of Technology
Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences
Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province

【目的】液体再分布器大都针对气液固共存体系优化设计,但在盐湖卤水吸附提锂工艺中,吸附塔属于液固体系,有必要研究开发新型液体再分布器与此特殊工况适配。【方法】提出了一种新型标准椭圆封头式液体再分布器,利用椭圆曲面实现集流,利用中心圆孔与环缝组合结构实现中心区域液体再均布。【结果】计算流体力学分析结果表明,在椭球中心沿直径向外100mm、200mm、290mm位置排布尺寸为7mm的3条环缝,液体均布效果最佳。【结论】相比现有液体再分布器完全截断壁流的结构方案,仅减小壁流的通流面积,利用椭球曲面将其导引至主流区外侧,可以解决因壁面粘性造成的近壁区域液体流量远低于中心的问题,实现液体充分均布。

【Purposes】 The liquid redistributor is an important internal component of packed bed reactor. Most liquid redistributors are optimized for gas-liquid solid coexisting systems, but in the process of lithium extraction from salt lake brine by adsorption, the adsorption tower be- longs to the liquid-solid system. It is necessary to research and develop new liquid redistributors to adapt to this special working condition. 【Methods】 A new type of standard elliptical head liquid redistributor is proposed, which utilizes an elliptical curved surface to achieve flow collection and a combination structure of a central circular hole and circumferential seams to achieve uniform liquid redistribution in the central area. 【Findings】 The results of computational fluid dynamic a- nalysis show that when three circumferential seams with the size of mm are arranged along the center of the ellipsoid with the diameter of 100, 200, and mm outward, the liquid distribu- tion effect is the best. 【Conclusions】 Compared with the existing structural scheme of completely cutting off wall flow in liquid redistributors, only reducing the flow area of the wall flow and u- sing an ellipsoidal surface to guide the wall flow to the outside of the mainstream area can solve the problem of liquid flow rate in the near wall area is much lower than that of the center caused by wall viscosity, achieving full and uniform distribution of liquid.

国家自然科学基金区域创新发展联合基金项目(U20A200495)

夏靖宇,杨景轩,靳利娥,等.标准椭圆封头式液体再分布器的设计与优化[J].太原理工大学学报,2024,55(3):566-572.

XIA Jingyu,YANG Jingxuan,JIN Li’e,et al.Design and optimization of standard elliptical head liquid redistrib-utor[J].Journal of Taiyuan University of Technology,2024,55(3):566-572.