YLW series thermal oil heater is square coil horizontal chain grate shop-assembled heater, chain grate and heater proper are transferred separately. The pictures show the chain grate which is autonomously designed and produced by ZOZEN with reliable quality. ZOZEN rationally designs different air distribution systems according to the characteristics of different fuels. By extending the furnace arch, increasing the height of the furnace, adjusting the width and length of grates, etc., ZOZEN thermal oil heaters can ensure sufficient combustion of fuels.