煤与垃圾衍生燃料的流化床混烧试验研究

Flue gas analysis of coal co-firied with refuse derived fuel

使用鼓泡流化床燃烧炉进行了煤与垃圾衍生燃料（RDF）的混烧实验研究，分析了燃烧尾气中嘎、CO、CO2、H2O、NOx,CH4、XO2、HCl、HCN浓度的变化，并对各成分之间的浓度进行了相关性分析。研究结果表明在750—900℃的范围内，高温利于SO2的脱除；NO的浓度随床温的提高而增加，NO2的浓度与床温的笑系不大；HCl的浓度随床温的升高而增加，说明高温不利于HCl的脱除；在空气量较低的情况下，CO、CH4、N2O、HCN等气体的浓度较高，相关分析表明，这些气体浓度之间有较强的正相关关系，说明这些气体适宜于还原气氛下生成；随着HCl气体浓度的增加，SO2浓度降低，说明HCl的存在可促进石灰石脱除SO2的反应，同时还证实煤与RDF混烧可使尾气中的SO2和HCl气体浓度均有所下降。

Co-firing of coal and refuse derived fuel（RDF）was carried out in a bubbling fluidized bed combustor, the components of O2, CO, CO2, H20, NOx, CH4, SO2, HCl, HCN in flue gas were measured, and the correlation among concentration was analyzed also. The experimental results indicated that higher temperature improved the SO2 removal but decreased the removal of HCl and increased the concentration of NO in the temperature range of 750 - 900℃. In the condition of less excess air, more CO, CH4, N2O and HCN were detected, which were usually formed in a reducing atmosphere. With the increase of HCl concentration in flue gas, the concentration of SO2 in flue gas decreased, and the co-firing of coal and RDF decreased the concentrations of both SO2 and HCl.