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基于化学动力学的方法,建立了煤与生物质燃烧过程中氯化物和碱金属化合物的释放模型.以氯元素为例,将模型计算的结果与实验结果进行比较,验证了模型的可靠性.模拟生物质再燃过程时,将该释放模型补充到详细反应机理中,研究不同温度和浓度下,氯化物和碱金属化合物对NO释放的影响.结果表明,对NO的还原效果,碱金属化合物高于氯化物,NaOH高于KOH.氯化物和碱金属化合物通过影响自由基的浓度,进而影响NO的释放.以大同煤中的碱金属为例,用ηNO=AT-BT2+DC-E的形式拟合得到温度和浓度影响NO还原率的规律.
Based on the method of chemical kinetics, a model for the release of chlorides and alkali compounds during the combustion of coal and biomass was established. Taking the chloride element as an example, the calculated results were compared with the experimental results to verify the reliability of the model. When simulating the process of biomass reburning, the release model was supplemented to the detailed reaction mechanism to study the effects of chloride and alkali metal compounds on the release of NO at different temperatures and concentrations.The results showed that the reduction effect of NO, the high content of alkali metal compounds In chloride, NaOH is higher than KOH. Chlorides and alkali compounds affect the release of NO by influencing the concentration of free radicals. Taking the alkali metal in Datong coal for example, using ηNO = AT-BT2 + DC-E Fitting the temperature and concentration affect the NO reduction rate of the law.