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首页> 外文期刊>Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers >Spinning cones as pumps,degassers and level controllers in mechanically stirred tanks
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Spinning cones as pumps,degassers and level controllers in mechanically stirred tanks

机译：水泵旋转锥、脱气器和水平控制器在机械搅拌罐

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摘要

The literature on spinning cones as pumps and degassers is reviewed.Experiments on a spinning cone rig designed to measure spinning cone-pumping rates are described.A large number of experiments were carried out,measuring pumping rates as a function of cone angle and immersion depth.Cone half angles were from 15 to 60°.Most of the tests were done with water but a number of runs were carried out with 75% by volume glycerol solution.This changed the viscosity and fluid density.An equation is proposed to predict the volumetric pumping rate (Q) of a cone in terms of its geometry and the physical properties of the fluids.Experiments with gassed fluids indicate that the liquid pumping rate of a spinning cone is independent of any gas present.It was also found that both outside and inside surfaces of the cone contribute equally to the fluid pumping process.The effectiveness of spinning cones as a degasser and/or level controller have been tested in mechanically agitated baffled vessels using cones mounted on the agitator shaft at the liquid surface.Under gassed conditions and with surfactants added to the liquid,the spinning cone was shown to be effective in controlling the level and reducing the gas voidage over a wide range of operating conditions.The effectiveness of the cone as a defoamer appears to scale at equal tip speed,suggesting that shear rate is the dominant mechanism.Tests were done on 2ft (0.61 m) and 3ft (0.914m) diameter stirred tanks.
机译：旋转锥泵和文学脱气器研究进展。锥钻机设计测量旋转cone-pumping率。进行的实验,测量泵利率作为锥角的函数和浸泡深度。测试用的水,但许多运行进行了与体积的75%甘油解决方案。密度。圆锥的体积泵送率(Q)的它的几何形状和物理特性液体。一个旋转锥的液体泵送率是独立于任何气体。发现内外表面锥同样有助于液体泵的过程。脱气器和/或液位控制器进行测试在机械搅拌困惑船只使用锥的搅拌器轴安装在液体表面。表面活性剂加入液体,旋转锥被证明是有效的控制水平和减少气体空隙率在一个宽范围的操作条件。锥的消泡器似乎规模提示速度相等,表明剪切率主导机制。米)和3英尺(0.914米)直径搅拌坦克。

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