| 摘要 |
PURPOSE:To contrive to reduce the unburned combustibles included in an ash without increasing the NOx concentration in an exhaust gas in a CWM burning by a method wherein a spraying medium is given the swirl motion, at less one injecting hole for mixing a slurry with the spraying medium is provided at the center, and plural injecting holes are provided around said injecting hole. CONSTITUTION:A burner nozzle is provided with an injecting hole 25 in a center axis direction and plural injecting holes 24 arranged radially around said injecting hole 25. Steam 22 for atomizing is supplied through plural supplying holes 26 given certain angle theta for the normal so that a swirl flow is produced in a chamber 21 in which the steam 22 and CWM23 are mixed. Therefore, the CWM23 is given a swirl motion by the steam 22 in the chamber 21, accordingly, a large diameter grain and a small diameter grain are respectively sprayed into a furnace by the inertia force through the injecting hole 25 located at the central part and the through the surrounding injecting holes 24 carried by the swirl flow. Therefore, the large diameter grain SWM nearby the burner is ignited initially, accordingly, the reducing of unburned combustibles can be contrived, also the small diameter grain CWM surrounding the large diameter grain is ready to produce reducing materials such as a NH4 and the like, thereby, the NOx reducing can be achieved simultaneously. |
