准东煤中钠高温形态的化学动力学模拟

Chemical Kinetics Simulation on High-temperature Morphology of Alkali Sodium in Zhundong Coal

采用化学动力学软件Chemkin对碱金属含量高的准东煤在燃烧过程中气相钠的高温形态分布进行模拟计算,将模型计算结果与文献中的试验结果进行对比,研究了温度、过量空气系数α和压力对碱金属钠在高温下形态分布的影响,并对含钠气相产物进行了敏感性分析.结果表明:计算结果与试验结果一致,验证了该模型的正确性;温度对含钠气相产物的转化有很大影响;当α<1时,含钠气相产物的组分分布受α的影响较大;压力对含钠气相产物物质的量分数的影响较小.

Chemical kinetics software Chemkin was applied to perform analog calculation on morphology distribution of gas-phase sodium at high temperatures in Zhundong coal with high alkali content during combustion process,and the calculation results were subsequently compared with reference data,so as to study the effects of following factors on the distribution of high-temperature morphology of alkali sodium,such as the temperature,excess air coefficient（α）and pressure,etc.,and to analyze the sensitivity of relevant products.Results show that the calculation results agree well with actual measurements,proving the model to be correct;temperature significantly influences the conversion of sodium-containing gas-phase products;the component distribution of sodium-containing gas-phase products is remarkably influenced byαin the case of α〈1,which is slightly influenced by pressure.