Abstract: In the hydrogenation unit, feed reaction furnace and fractionation heating furnace are important heating equipment. With the upsizing of equipment, the heat load of fractionation heating furnace is also increasing. For the upsizing heating furnace, the furnace type selection is diversified. In order to choose the furnace type of heating furnace between box furnace and cylindrical furnace, designers have different considerations and focuses. In this paper, the furnace type of fractionation heating furnace in hydrogenation unit is discussed from different aspects such as process parameters, structure parameters, manufacturing and transportation so as to provide reference for the selection of furnace type.

Key words: furnace type, double radiation box furnace, double radiant chamber cylindrical furnace