德士古气化炉激冷室下降管内气液传热传质过程研究

Investigation on Gas-Liquid Heat and Mass Transfer in Vertical Pipe of Texaco Gasifier Quench Chamber

采用VOF多相流模型建立德士古气化炉激冷室下降管内气液两相直接接触热质传递的二维数学模型。模型考虑了合成气内部组分扩散,表面张力作用和辐射热传递。同时进行了实验研究以验证模拟结果,数值预测的温度分布与实验吻合良好。采用所建立的模型预测了水蒸气浓度分布和有无相变时降膜流动流型。

Two-dimensional gas-liquid direct-contact heat-mass transfer in vertical pipe of CWS entrained-flow gasifier was simulated using VOF multiphase flow model. Water vapor diffusion in the syngas, surface tension and radiation heat transfer were considered when establishing the mathematics model. The corresponding experiment was conducted to validate the simulation results, and bution was in a good agreement of the falling water film with or with experiment. With this without phase change were the numerical prediction of the temperature distri- model, the vapor concentration and the flow pattern predicted.