| 摘要 |
PROBLEM TO BE SOLVED: To accelerate the diffusion of air for combustion within a furnace and materialize favorable combustion and prevent increase in the quantity of soot and dust caused by bad combustion and occurrence of instable combustion, by raising the temperatures of primary air and secondary air at the time of single operation of a boiler using fresh air, thereby increasing the volume flow and the injection velocity of a fuel air nozzle and an auxiliary air nozzle in an exhaust recombustion type of boiler device which uses exhaust gas and air (fresh air) including the atmosphere while changing them. SOLUTION: In an exhaust recombustion type of boiler device which uses exhaust gas and air, switching them, as air for combustion, and in which a fuel air nozzle and a an auxiliary air nozzle are arranged in a burner wind box, either or both of the fuel air nozzle and the auxiliary air nozzle are provided with radiation converters which heat primary air or secondary air by the radiant heat from the above furnace, and are provided with converter position adjusters which adjust the distances to the above furnace of those radiation converters. |
