Mathematical Modeling of Bed Liquid Holdup of Turbulent Contact Absorber
1. Moxi Natural Gas Purification Plant of Central Sichuan Oli & Gas Field, PetroChina Southwest Oil & Gasfiled Company, Suining 629000, China;
2. College of Chemical Engineering, China University of Petroleum(Beijing), Beijing 102249, China;
3. Changzheng Engineering Co, Limited, Beijing 102249, China
Abstract：Hydrodynamics experiments were carried out in a pilot-scale turbulent contact absorber (TCA), and the effects of experimental parameters, such as operation gas velocity, static bed height, free open area of grid, ball diameter on bed pressure drop and liquid holdup were investigated. The liquid holdup regression model was presented using Buchingham π-theorem and partial least squares regression(PLSR) algorithm. Furthermore, the 2 liquid holdup models respectively proposed by Gel perin and V-Noakovic were cited, to compare with the new liquid holdup model. Then the 3 models were evaluated based on literature experimental data. The results showed that PLSR algorithm was effective in handling the samples with small capacity and variables with strong correlation. The accuracy and precision of the liquid holdup model by PLSR was better than those of the models cited from literature. By validating with 2 groups of experimental data in literature, the mean square errors(MSPE) of the new liquid holdup model were 2.5% and 3.1%, respectively. The accuracy and precision of predicting liquid holdup was better than those of Gel perin’s and V-Noakovic’s models, which indicated that the partial least-squares regression algorithm to predict TCA bed liquid holdup was feasible.
Huang Xuefeng1,Sun Guogang2,Zhang Yuming2 et al. Mathematical Modeling of Bed Liquid Holdup of Turbulent Contact Absorber[J]. 化学反应工程与工艺, 2015, 31(4): 307-314.
