费托合成环隙型微通道反应器内气液流动、传热与传质特性的实验研究与数值模拟

Fischer-Tropsch Synthesis (FTS) is the key reaction for CTL process. A novel Micro Concentric Annuli Reactor (MCAR) is proposed for FTS. Liquid and gas-liquid flow parameters in the MCAR are studied experimentally, including fluid velocity, flow style, resistance, pressure drop, gas dispersion and bubble size. The classification and judging standard for the gas-liquid flow style in the MCAR are proposed. Heat transfer between the flow and cooling media is studied and heat transfer dimensionless number is configured. Gas-liquid mass transfer is measured and mass transfer dimensionless number is proposed. At the same time, numerical simulation based on commercial CFD software is applied for the gas-liquid flow in the MCAR. Based on the results of experimental test and numerical simulation, an optimal geometry design and the best operation conditions for the MCAR are obtained. A real Fischer-Tropsch Synthesis reaction is performed in the optimal design device under proposed operation parameters to verify the effectiveness of the model.

费托合成是煤制合成油的关键反应。本申请提出一种适用于费托合成反应的新型环隙型微通道反应器。以环隙型微通道反应器内气液两相流动、传热与传质为研究对象，通过实验对比不同几何尺寸和操作条件下，微通道内单液相和气液两相的流型、流速、阻力、压降、气相分散状况、气泡尺寸、传热和气液传质系数，并建立环隙型微通道内气液两相流动形态的分类及判别标准；同时构建了环隙型微通道传热准数模型和气液传质准数模型。运用数值模拟方法，建立环隙型微通道气液两相流动模型，预测微通道内气液两相体系的流动特性，探索微通道内的流动、界面滑移和相间作用力等对流动的影响规律。结合实验研究和数值模拟结果，提出费托合成环隙型微通道反应器的优化构型和最优操作条件，并进行费托合成热膜试验验证。

费托合成是煤制合成油的关键反应。本申请提出一种适用于费托合成反应的新型环隙型微通道反应器。以环隙型微通道反应器内气液两相流动、传热与传质为研究对象，通过实验对比不同几何尺寸和操作条件下，微通道内单液相和气液两相的流型、流速、阻力、压降、气相分散状况、气泡尺寸、传热和气液传质系数，并建立环隙型微通道内气液两相流动形态的分类及判别标准；同时构建了环隙型微通道传热准数模型和气液传质准数模型。运用数值模拟方法，建立环隙型微通道气液两相流动模型，预测微通道内气液两相体系的流动特性，探索微通道内的流动、界面滑移和相间作用力等对流动的影响规律。结合实验研究和数值模拟结果，提出费托合成环隙型微通道反应器的优化构型和最优操作条件，并进行费托合成热膜试验验证。