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首页> 外文会议>International mineral processing congress;IMPC 2010 >ADVANCES IN THICKENER FEEDWELL DESIGN VIA COMPUTATIONAL FLUID DYNAMICS MODELLING
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ADVANCES IN THICKENER FEEDWELL DESIGN VIA COMPUTATIONAL FLUID DYNAMICS MODELLING

机译：通过计算流体动力学建模进行增稠剂Feedwell设计的进展

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摘要

Gravity sedimentation is universally used for solid-liquid separation in the mineral processing andwater treatment industries. Key to the unit’s performance (throughput, underflow density, overflowclarity) is the feedwell design. Computational Fluid Dynamics (CFD) modelling is now beingroutinely used to assess thickener feedwell performance, both for new and retrofit units, and as partof wider R&D development for improved feedwell design. This is currently an active area of R&Dwith a number of new-generation feedwell designs recently coming onto the market.Feedwell design is complex and challenging since the feedwell must simultaneously fill a number ofcompeting roles. Firstly, it must slow the incoming feed stream and dissipate its momentum beforedistributing it evenly and gently across the mud bed. Secondly, it must act as a flocculation vessel,using the turbulence generated to mix the feed slurry with flocculant solution and dilution water. Thefeedwell may also be required to deaerate the slurry, provide the required flow of dilution water andcope with process upsets or other changes to the feed (rate, concentration, particle size).Described is the new-generation Outotec Vane Feedwell. The function and interaction of variousdesign elements (vanes, shelf and deflector cone) is discussed in relation to overall flow pattern,solids concentration, dilution, mixing, shear and exit flow distribution.
机译：重力沉降在矿物加工和水处理行业中普遍用于固液分离。进料口设计是设备性能（通量，下溢密度，溢流清晰度）的关键。现在，常规地使用计算流体动力学（CFD）建模来评估增稠器给水井性能（包括新设备和翻新设备），并且作为更广泛的研发开发的一部分，以改进给水井设计。目前，这是R＆D的活跃领域，最近有许多新一代的馈线设计进入市场。馈线设计既复杂又具有挑战性，因为馈线必须同时扮演许多竞争角色。首先，它必须减慢进入的进料流并驱散其动量，然后才能将其均匀，轻轻地分布在整个泥床中。其次，它必须充当絮凝容器，利用产生的湍流将饲料浆液与絮凝剂溶液和稀释水混合。还可能需要给料仓对浆液进行除气，提供所需的稀释水流量并应对工艺不正常或进料的其他变化（速率，浓度，粒度）。描述了新一代奥图泰叶片式给料仓。讨论了各种设计要素（叶片，搁板和导流锥）的功能和相互作用，涉及整体流型，固体浓度，稀释，混合，剪切和出口流分布。

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