The experiment equipment of coal pyrolysis process of internalheated rotaryfurnace with capacity of 3 kg/h was set up. It was studied about the effect of pyrolysis tempera-ture, pyrolysis time, coal size and air excess ratio of gas combustion on tar yield. The relationbetween primary tar yield and pyrolysis temperature can be simulated by normal function whilethe relation between tar decomposition percentage and gasous temperature by We1bull function.The effect of coal propertles on tar yield was researched. The properties...
