一种新型浓密机进料井结构的研究

摘要

通过对传统浓密机进料井结构进行研究，提出了一种结构简单、便于改造的新型浓密机进料井结构。采用计算流体力学的方法对新型进料井结构的内部流场进行了数值模拟，研究了进料井内的迹线分布、出口平面固相体积分数分布和速度分布。结果表明，新型浓密机进料井结构在不同的进料速度下，能够有效耗散进料悬浮液的动能，均匀分布物料。该结构可使物料从进料井的各个方向与径向呈一定角度流出，延长了物料到达溢流堰的时间，溢流液澄清度高，提高了分离效果。新型进料井结构不需要提高任何外动力，节约能耗，在工业上有较大的应用价值。

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	谭蔚
	陈晓楠
	汪洋
	朱国瑞

关键词：新型浓密机进料井；流场；数值模拟

Abstract：

A novel thickener feedwell was developed based on the traditional feedwell. It was easy to reform and had a simple structure. The flow field of the novel thickener feedwell was researched by computational fluid dynamics. The distribution of path line, the solid volume fraction and the velocity distribution in the exit plane were studied. The novel thickener feedwell could cope with variations of the flow rate, dissipate the kinetic energy of the feed stream and provide a uniform discharge pattern. The direction in which suspensions flowing out of the feedwell had an angle with the radial direction. The time increased for the feed to reach the overflow weir, making high solid-liquid separation efficiency. The novel thickener feedwell could work without any power and had a number of applications.

Keywords： novel thickener feedwell； flow field； numerical simulation

Received 2015-05-13;

Corresponding Authors: 汪洋,E-mail:owenlemon@tju.edu.cn。 Email: owenlemon@tju.edu.cn

About author: 谭蔚(1965-),女,教授,博士,研究方向为固液分离技术与设备。

引用本文:

谭蔚, 陈晓楠, 汪洋, 朱国瑞.一种新型浓密机进料井结构的研究[J]. 化学工业与工程, 2017,34(2): 84-88

Tan Wei, Chen Xiaonan, Wang Yang, Zhu Guorui.Research on the Structure of a Novel Thickener Feedwell[J]. Chemcial Industry and Engineering, 2017,34(2): 84-88

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