The lower part of the boiler is the burning device that is equipped with the light-type chain grate stoker, the coal supply machine, the ash extractor, the dust collector and the electric control box. It realizes the mechanization of coal supply and ash discharging and the automatic control of feed water. The boilers of this series have following merits: compact structure, small size, single layer layout, short installation time, and little investment to the base construction. http://www.chinaboilermaker.com