| 摘要 |
PROBLEM TO BE SOLVED: To provide a boiler capable of lowering concentrations of not only CO as main unburned components in an exhaust gas but also a small amount of VOC. SOLUTION: Burner 2 of one or more stages having an air ratio of less than 1, are mounted at lower portions of front and back opposite wall surfaces of a furnace 1, and secondary combustion air supply openings 3 are formed on front and back walls at a wake flow side (upper portion of furnace 1). Projections 11 extending in the direction (approximately horizontal direction) intersecting with gas flow are formed on opposite side wall surfaces at both sides of the front and back walls of the furnace at a height same as or slightly lower than the secondary combustion air supply opening. The projections prevent the rising of gas flow including the unburned components of high concentration generated by the combustion of fuel in the burner 2 and the rising along the side wall, and direct the gas to the internal direction of the furnace 1, thus the unburned components are oxidized by contact with the flow of secondary combustion air, and the concentrations of both of VOC and Co can be reduced without eccentrically located to an outlet 4 of the furnace 1. COPYRIGHT: (C)2007,JPO&INPIT
|
