Patent ID: 7021222

Claim:
An ignition and burning apparatus used in a coal boiler, comprising a pulverized coal burner ( 3 ) and one or more miniature oil guns ( 14 ) inserted in the pulverized coal burner, wherein the miniature oil gun ( 14 ) comprises a first air supplying cylinder ( 10 ), an atomizing nozzle ( 17 ) positioned in the first air supplying cylinder, an oil burner ( 15 ) at a lower end of the atomizing nozzle, an ignition device ( 18 ) adjacent to the oil burner and an air intake ( 19 ) communicating with the first air supplying cylinder ( 10 ), wherein the pulverized coal burner ( 3 ) comprises a cooling air cylinder ( 21 ), an air intake ( 22 ) communicating with the cooling air cylinder ( 21 ), an expansion channel ( 1 ) supported in the cooling air cylinder ( 21 ) by a support ( 4 ), cooling structures surrounding the expansion channel, an external nozzle ( 2 ) at one end of the expansion channel and a second air supplying cylinder ( 11 ) adjacent to the miniature oil gun and communicating with the expansion channel; characterized in that said oil burner ( 15 ) comprises a cyclone ( 16 ), a corrugated sheet cooler ( 13 ), deep oxygen-adding holes ( 12 ) and a housing ( 20 ).