油水煤浆在新型气化炉内气化过程的数值模拟

在多喷嘴入口新型水煤浆气化炉内对油水煤浆(COW)的气化过程进行了数值模拟计算研究,分析了气化炉内的温度分布、各种气化产物浓度分布规律。数值模拟计算结果证明,同浓度的油水煤浆气化与普通水煤浆气化相比,气化炉内平均温度略有上升,碳转化率提高1.81%,气化炉出口粗煤气中有效气(CO H2)含量提高10.58%,CO2和H2O浓度大幅下降,水分解率大大提高,气化效果明显优于普通水煤浆。

Numerical Simulation of the Gasification Process of Coal-Oil-Water Slurry in a New Type Gasifier

A study of numerical simulation and calculation was performed of the gasification process of coal-oil-water slurry in a new type of water-slurry gasifier incorporating multiple nozzle inlets.A law governing the temperature distribution in the gasifier and concentration distribution of various gasification products has been analyzed.The results of the numerical simulation calculation show that when the gasification of oil-water-coal-slurry is compared with that of common water-coal-slurry both having the same concentration,the average temperature in the gasifier has undergone a slight increase.The carbon transformation rate shot up by 3.39% and the effective gas(CO H2) content in the raw gas at the outlet of the gasifier rose by 10.58%.The concentration of CO2 and H2O was reduced by a great margin with water decomposition rate being enhanced greatly.The gasification effectiveness has been obviously better than that of conventional water-coal-slurry.