During the process of wood production,the cost
for drying occupies largish ratio in total cost.
Energy saving and consumption decreasing are important
way to decrease cost.Anciently during the process of
drying,adapt steam or heat conduction oil to heat.The
coal fuel must heat water and make water to become
steam or heat the heat comduction oil first and then heat
air through radiator.Nevertheless hot
air furnace will heat air by coal fuel directly.So the heat
exchange
ring and heat exchanger are omit.The thermal coefficient
of system is raised and the cost of
operation is decreased greatly.
