煤粉富燃料燃烧过程中气态含S组分的详细化学动力学模拟

Detailed Chemical Kinetics Simulation of Gaseous Sulfur Species in the Process of Pulverized Coal Combustion under Fuel-rich Atmosphere

采用低NO_x燃烧技术的煤粉炉通常会产生高浓度的H_2S,这是高温腐蚀的主要原因之一。准确地预测含S组分(尤其是H_2S)在煤粉燃烧过程中的演化行为,对煤粉炉的设计和运行具有非常重要的意义。在前人研究的基础上,提出了一个比较准确的含S组分详细反应机理,其预测结果和课题组先前的实验数据基本相符。进行生成速率分析后,可以确定影响含S组分生成或消耗的关键基元反应,进而为高温腐蚀的防治提供一定的理论帮助。

Pulverized coal-fired boilers applying low-NOx combustion technologies usually produced high-concentration H2S,which is one of the main reasons for high temperature corrosion.Accurate prediction of sulfur species,especially H2S,is of great significance for the design and operation of pulverized coal-fired boilers.According to the previous research results,an accurate detailed reaction mechanism of gaseous sulfur species was presented and it's prediction results were consistent with the previous experimental data.After the rate-of-production analysis,the key elemental reactions affecting the formation or consumption of gaseous sulfur species were determined,which can provide some help for the prevention of high-temperature corrosion.