Co-combustion of sludge with coal is expected to improve the combustion characteristics of fuel

which can promote the innocent treatment and resource utilization of sludge. In this work

the co-combustion characteristics of Huainan coal and three types of wet sludge with high moisture content were investigated by temperature-programmed thermogravimetric experiment. Two typical iso-conversional methods

Flynn-WallOzawa method and Kissinger-Akahira-Sunose method

were used to obtain the kinetic parameters during the cocombustion process. The proportions of sludge in blended samples are 10%

30% and 50%(by mass). The experimental results show that

the weight loss of the blended sample mainly occurs at lower than 200 ℃ and 400～1 000 ℃. The weight loss of the blended sample between 400～1 000 ℃ becomes more insignificant as the sludge proportion increases. When the sludge mass proportion accounts for 10%

the weight loss of the blended sample is similar to that of coal. The apparent activation energy of the individual coal combustion and cocombustion of sludge with coal decreases with the increasing conversion ratio. The latter is always higher than the former at the corresponding conversion ratio.