Wang Junjie, Institute of Engineering Thermophysics, Chinese Academy of Sciences: Heat Treatment Technology of Alternative Fuels and Its Application in Cement Industry

From September 23 to 24, the 14th China Cement Energy Conservation and Environmental Protection Technology Exchange Conference and the 6th Intelligent Summit Forum were held in Zibo, Shandong Province.

At the meeting, Wang Junjie, a thermal expert from the Institute of Engineering Thermophysics, Chinese Academy of Sciences, shared "Alternative Fuel Heat Treatment Technology and Its Application in Cement Industry". Wang Junjie said that alternative fuel heat treatment technologies include drying, pyrolysis, gasification, combustion and so on.

Drying mainly includes belt drying, rotary drying and flash drying, which should be selected according to the characteristics of alternative fuels and the heat source in the plant.

Pyrolysis uses the heat of the hot raw material itself to heat the alternative fuel, and then sends it to the decomposition furnace for combustion, which improves the fuel efficiency and denitrification effect. The

commonly used gasifier is fluidized bed. Foreign cement enterprises first used CFB gasification in 1995, which has the functions of high combustion efficiency, coordinated denitrification and impurity discharge, but the complete gasification equipment is large and the heat and power consumption is high. The Institute of Engineering Thermophysics of

the Chinese Academy of Sciences has developed the activation technology of alternative fuels. After partial gasification, the alternative fuels are sent to the decomposition furnace for combustion, which achieves high combustion efficiency, coordinated denitrification and impurity discharge, reduces the scale of equipment and investment costs, and reduces the increase of heat and power consumption.