Abstract：Two sludge incineration projects of textile dyeing factories in Guangdong Province were studied. Starting from the survey of sludge treatment technique routes, incineration facilities and flue gas treatment processes, air pollutants of sludge and coal co-combustion such as dust, NOx, SO2, acid gases (HF and HCl), heavy metals and the removal efficiency of different pollutant control facilities of each project were clarified by means of on-site sampling analysis and investigation. The result shows that the effect of bag filter is satisfying, the removal efficiency could reach more than 99%; FGD technology which using textile dyeing wastewater as absorbent is not suitable for SO2 and acid gases removal; SNCR technology is economical and efficient for NOx removal; most heavy metals existing in dust could be removed by filters, while the concentration of some heavy metals (such as Hg) in outlet gas is still high, in which extra measures need to be taken to control heavy metals in flue gas. In addition, a process of dyeing sludge and coal co-incineration flue gas treatment is put forward according to the analysis of textile dyeing sludge incineration examples.
