DRYING FURNACE

摘要

PROBLEM TO BE SOLVED: To provide a drying furnace which reduces the newly supplied air for combustion by directly mixing a waste gas with the air for combustion of a burner of the drying furnace, and improves the efficiency in combustion of the burner by the preheat of the waste gas. SOLUTION: A circulating channel 9 is formed for directly recirculating a part of the waste gas from a gas flue 6 to an air supply passage 5. Further a mixer 11 for adjusting a mixing ratio of the air for combustion and the waste gas is mounted on a meeting part of the air supply passage 5 and the circulating channel 9. COPYRIGHT: (C)2003,JPO