固定床吸附柱轴向返混系数的估算

Estimation of Axial Dispersion Coefficient of Fixed Adsorption Column

以质量分数为 0 .16 %的KCl溶液为示踪剂 ,采用扰动 -应答技术测取模型参数 ,并以传递函数法和富里哀分析法拟合 ,当s取值在 1.0～ 1.5、ω取值在 0 .0 2～ 0 .10时 ,求出了不同柱高、柱径和流速下的返混系数 .结果表明 ,不同柱高、柱径和流速下由两种方法计算得到的轴向返混系数数值相当 ,这也验证了此二法的准确性 .

In this paper, 16% (mass fraction) KCl solution was used as tracer. The model parameters had been measured with stimulate_response method and axial dispersion coefficients were estimated with transfer function and Fourier analysis method. When s was chosen at range of 1.0～1.5, and ω was chosen at the range of 0.02～0.10, axial dispersion coefficients at different column height, radius and velocity of the fluid had been obtained. Results show that axial dispersion coefficients obtained by two methods were almost equal, which can prove these two methods to be correct.