A new method for determining mixing time in stirred tanks
A new method for determining mixing time in stirred tanks
复制标题
确定搅拌罐混合时间的新方法
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
Sinopec Safety
中科院分区：
文献类型：
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作者：
Z. Qinghua;Sinopec Safety
提出了一种新的混合时间定义，该定义基于井-在对全流场进行数值模拟的基础上，通过求解示踪剂的输运方程，考察了单涡轮涡轮机搅拌槽内的混合过程。结果表明，混合时间的大小与搅拌桨的转速和位置有关，在相同转速下，混合时间随搅拌桨转速的增大而减小，搅拌桨的转速越高，混合时间越短，搅拌桨的转速越大，搅拌桨的转速越高，搅拌桨位于搅拌槽中心时，混合时间最短，导流筒的尺寸和位置适当，可有效缩短混合时间。
A new definition of mixing time was proposed based on the fraction of well-mixed volume.The mixing process in the stirred tank with a single Rushton turbine was examined by solving the transport equation of the tracer based on the numerical simulation of the whole flow field.It was shown that the value of mixing time was dependent on the speed and position of impeller.Mixing time decreased with the increase of impeller speed at the same volume concentration.When the impeller was in the center of the tank, the mixing time was the shortest.The draft tube with proper dimension and position could effectively decrease mixing time.