CFX模拟分解炉内CaCO3分解反应的研究

运用CFX模拟分解炉模型内的流动、煤粉燃烧、CaCO3的分解过程,对系统进行气体组分质量平衡和热量平衡计算,结果表明：O2的相对误差<3%,CO2的相对误差<9%,热量的相对误差<9%,表明用CFX模拟分解炉时的可靠性达90%以上；当计算参数如CaCO3量或煤粉量变化0.01%时,炉内温度分布、出口温度、CaCO3分解率等变量几乎没有变化,而当计算参数的变化量大于0.01%时,计算结果就看出变化,即CFX的模拟计算结果响应这两个计算参数变化的灵敏度可达到近万分之一。

Using CFX to Simulate Decomposition Reaction of CaCO3 in Calciner

Using CFX to simulate the flow, coal combustion and CaCO3 decomposition process of the calciner model, calculating mass balance and thermal balance calculation of gas components in the system, the results show that the relative error of O2 is less than 3%, CO2 is less than 9%, and the relative error of thermal is less than 9%, indicate that the reliability of using CFX to simulate calciner is more than 90%. When computational condition such as the amount of CaCO3 or pulverized coal is changed by 0. 01%, the temperature distribution of the furnace, the outlet temperature and the decomposition rate of CaCO3 is almost unchanged, while the variation is greater than 0. 01%, the results are seen to be changed. That is the sensitivity of simulation results calculated by CFX in response to these two calculation parameters can reach nearly 1/10000 .