Energy efficiency analysis for high-viscosity fluid mixing enhanced by flexible impeller

被引：0

作者：

Liu, Zuohua ^{[1
]}

Zeng, Qiqin ^{[1
]}

Wang, Yundong ^{[2
]}

Liu, Renlong ^{[1
]}

Tao, Changyuan ^{[1
]}

机构：

[1] School of Chemistry and Chemical Engineering, Chongqing University

[2] Department of Chemical Engineering, Tsinghua University

来源：

Huagong Xuebao/CIESC Journal | 2013年 / 64卷 / 10期

关键词：

Flexible impeller; Mixing performance; Mixing time; Power consumption; Stirred tank;

D O I：

10.3969/j.issn.0438-1157.2013.10.018

中图分类号：

学科分类号：

摘要：

The mixing performance of stirred tank is usually low for high-viscosity laminar flow mixing system. In order to intensify mixing performance, isolated mixing regions were experimentally destroyed by flexible impeller. Power consumption and mixing time were measured with viscous glycerin as working fluid, together with the shaft torque method and acid-alkali visualization technology. Comparison of power characteristics (PV) and mixing performance between rigid Rushton turbine (RT) impeller and flexible RT impeller was analyzed with different flexible materials. The PV of rigid and flexible impeller did not have significant difference at the same agitation speed (N=60 r·min-1, PV=340 W·m-3 of rigid, PV=346 W·m-3 of flexible). Good mixing performance could be obtained by flexible impeller at θm=2 min, while the isolated mixing regions of rigid impeller still existed until θm=30 min. The mixing performance number of flexible was minimum (Ce=2.9×106) and mixing performance was optimal at N=120 r·min-1. Compared with the rigid impeller, mixing performance of silicone rubber flexible impeller was improved by 52.8%, and the mixing performance of PVC and rubber flexible impeller was improved by about 51.1%, 50.5%, respectively. © All Rights Reserved.

引用

页码：3620 / 3625

页数：5

共 27 条

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