... of wood, coal, diesel, LPG, gas. Direct or Indirect Biomass Furnace is ideal for the WSG-series ... is a type of industrial dryer employed to reduce or minimize the liquid moisture content of the material. The ... the feed end (known as co-current flow), or toward the feed end from the discharge end ( ... . Alternatively, the hot air may consist of air or another (sometimes inert) heat energy that is preheated. ...