PURPOSE: To permit the employment of the fuel of pulverized coal from the ignition of a boiler to the full load operating condition of the same, by a method wherein an ignitor for ignition is provided at a flame holding section, where primary sleeve is provided at a fore part opposing to a furnace, and introduced primary air is supplied at a specified C/A ratio.
CONSTITUTION: An ignitor sleeve 11 is constituted at one corner of a flame holding section 10 and an ignitor rod 12 is mounted in the ignitor sleeve 11 while an ignitor 13 is mounted at the tip end of the ignitor rod 12. Eddy current 14 is generated in the flame holding section 10 in conjunction with the introduction of the mixture of pulverized coal and primary air. Because the pulverized coal are pulverized into super fine grains by the primary air of C/A ratio 0.7W1.0, the vicinity of the eddy current 14 becomes a space in which ignition is effected most easily. On the other hand secondary air is injected radially while being whirled by a swirler 7, therefore, the flow pattern thereof generates a counter flow area at the central part thereof due to reverse flow 16, therefore, the principal stream of the pulverized coal forms the flow of diffusion as shown by arrow signs 17 in a diagram, whereby the efficiency of combustion may be improved.
| JPS62242713 | FLOW REGULATOR PLATE FOR COAL BURNER NOZZLE |
| JPS59124808 | [Title of the device] Pulverized coal firing equipment |
| WO/2018/138323 | BURNER, PARTICULARLY BROWN COAL JET BURNER |
MORITA SHIGEKI
NAKASHITA SHIGETO
HAMADA IKUHISA
| JPS61272512A | 1986-12-02 | |||
| JPS55112917A | 1980-09-01 |