滴流床反应器的研究——Ⅰ.确定滴流区与脉动区边界的方法

STUDIES ON TRICKLE-BED REACTORS Ⅰ.METHODS FOR DETERMINATION OF THE BOUNDARY OF TRICKLING-TO-PULSING FLOW TRANSITION

不同于通常采用的划分滴流床中流区分界点的方法,本文通过分析压降信号的概率密度函数、压降波动标准偏差以及根据液固传质系数的突变,确定滴流床中滴流区向脉动区的转变点。实验结果证明,这两种方法都能够准确、可靠地用来判断滴流床中流动形态的变化。

The boundary of trickling-to-pulsing flow transition in trickle-bed reac- tors may be determined either by statistical feafures of the probability density function and standard deviation of pressure drop fluctuation or by sudden change in liquid-solid mass transfer coefficients, which are different from commonly used methods. Experimental results indicate that both methods are precise and reliable approaches for identification of flow pat- tern transition.