【摘要】 为了深入研究燃煤Hg排放控制技术,在分析Hg形态转化过程及其影响因素基础上,通过控制变量法设定模拟烟气组分（HCl、O₂、NO、H₂O、CO₂和SO₂）的初始浓度值,利用化学动力学计算软件Chemkin进行数值模拟.结果表明:Cl原子的存在会促进单质Hg（Hg⁰）向氧化态Hg转化,在一定范围内增加HCl的量有利于Hg的氧化;O₂会促进Hg的氧化但作用不如HCl明显;根据其所处的烟气气氛,NO既能促进Hg的氧化也能抑制Hg的氧化,在氧化性气氛中,NO的存在会提高Hg的氧化率;H₂O有利于Hg的氧化,而CO₂的存在会造成局部很强的还原性气氛,会抑制Hg的氧化;在不同条件下,SO₂可以促进或抑制Hg氧化.更多还原

【Abstract】 Based on analysis of the transformation process of mercury speciation and related influencing factors,numerical simulations were conducted to study the control technology of coal-fired mercury emission with chemical kinetics calculation software Chemkin by setting the initial concentrations of various components（such as HCl,O₂,NO,H₂ O,CO₂and SO₂）in simulated flue gas using control variable method.Results show that the existence of chlorine atoms can promote the transformation of elemental mercury（Hg⁰）into oxidized mercury;increasing the amount of HCl within a certain range is beneficial to the oxidation of Hg⁰.O₂ can promote the oxidation of mercury,but not as obvious as HCl.Depending on the flue gas atmosphere,NO can not only promote but also inhibit the oxidation of Hg⁰;in the oxide atmosphere,NO has a positive effect on the oxidation of Hg⁰.H₂ O is beneficial to the oxidation of mercury,while presence of CO₂ would inhibt the oxidation of mercury due to the strong reducing atmosphere caused by CO₂.Under different working conditions,SO₂ can promote or inhibit the oxidation of Hg⁰.更多还原