An entrained flow gasification of Shenmu coal was modeled in this work. The conventional gasification reaction process was split into two stages - pyrolysis and gasification. The model was comprised of various unit operations including preheating of feedstock, mixing, pyrolysis, gasification, heat exchanging, separation, and quenching, which were correlated to an actual gasification process. Both direct and indirect heat exchanging among the feedstock, the product, the reaction system, the cooling water and the quench water were taken into consideration. The investigation included the influence of water/coal ratio, oxygen/coal ratio, and temperature on the composition of the product gas, the yield of the product and the quench water amount. The results showed that H₂ concentration in gas product was favored at higher water/coal ratios and lower temperatures, which was opposite to the trend of CO. CO₂ concentration would be lower at lower temperature and lower water/coal ratio. A novel cooling loop was proposed in this work to recycle the cooling water and to stabilize the process. The analysis showed that the quenching water affected the synthesis gas indirectly and the amount of the loop water. The extra quenching water would be drained off from the recycling system. The investigation results are meaningful for controlling of the gasification system and the desired products.

该工作模拟了神木煤的气流床气化。传统的气化反应过程分为热解和气化两个阶段。该模型由各种单元操作组成，包括原料的预热，混合，热解，气化，热交换，分离和淬火，这些操作与实际的气化过程相关。同时考虑了原料，产物，反应体系，冷却水和骤冷水之间的直接和间接热交换。研究包括水/煤比，氧气/煤比和温度对产物气体组成，产物产率和急冷水量的影响。结果表明，H ₂在较高的水/煤比和较低的温度下，气体产物中的CO ₂浓度有利于CO，这与CO的趋势相反。在较低的温度和较低的水/煤比下，CO ₂浓度将较低。在这项工作中提出了一种新颖的冷却回路，以循环冷却水并使过程稳定。分析表明，淬火水间接影响合成气和回路水的量。多余的淬火水将从循环系统中排出。研究结果对于控制气化系统和所需产品具有重要意义。