采用热重红外联用仪研究了印染污泥与烟煤的掺混燃烧过程． 结果表明: 污泥燃烧存在3 个主要阶段，分别对应于150 ～ 350 ℃区间纤维类挥发分的析出和燃烧、350 ～500℃区间细菌蛋白质等高分子有机质的燃烧以及500℃后无机染料矿物质的煅烧; 烟煤中掺入印染污泥可提高着火特性，30% 掺混时可降低着火点约20℃，同时综合燃烧特性指数下降; 印染污泥燃烧初期活化能仅为70 kJ /mol，燃烧后期活化能升至130 ～ 160 kJ /mol;随烟煤中污泥添加量的增加，混合物初始阶段的活化能减小而后续燃烧阶段的活化能增大． 综合分析发现，当污泥量低于20% 时，对整体燃烧特性的影响较小． 热重红外曲线表明: 污泥与烟煤混合后，矿物质之间通过反应对污染物的行程产生影响; 污泥灰分中的碱性氧化物以及起固硫催化作用的Fe2O3有利于将混合物中的硫固定在灰渣中; NO_x主要来源于燃料型NOx的释放; 由于污泥易于脱挥，析出小分子的可燃气体形成还原性气氛，有利于降低混合物燃烧前期NO_x的生成．

This paper deals with the co-combustion of dyeing sludge and bituminous coal by means of TGA-FTIR.The results show that ( 1) the co-combustion process mainly consists of three stages respectively corresponding to the de-volatilization and combustion of fiber materials at 150 ～ 350 ℃,the combustion of high-molecule polymer materials like bacterium protein at 350 ～ 500℃ and the calcining of inorganic mineral substancesin the dyestuff above 500℃; ( 2) the addition of dyeing sludge in bituminous coalpromotes the ignition,and a sludge dosage of 30% may result in an ignition temperature decrement of 20℃as well as a reduced general combustion parameter; ( 3) the apparent activation energy in the initial combustion stage of the sludge is only 70 kJ /mol and then increases to 130 ～ 160 kJ /mol in the later stage; ( 4) with the increase of sludge dosage,the apparent activation energy of the blend decreases in the initial combustion stage while increases in the later stage; and ( 5) comprehensively,the sludge dosage less than 20% only slightly influences the whole combustion process.Moreover,TGA-FTIR results indicate that ( 1) the mineral substances influence the pollutant emission process in blends via multiple reactions; ( 2) the alkali oxides and Fe₂O₃ in the dyeing sludge both benefit the fixation of sulphur in the ash; ( 3) NO_x mainly comes from the fuel; and ( 4) as the sludge is easy to de-volatilize,a reducing atmosphere consisting of smallmolecule combustible gases may form,which helps to suppress the generation of NO_x blends in the initial combustion stage.