The utility model relates to a combustor ignition technical field especially relates to an ignition and combustor. This ignition, some burning things which may cause a fire disaster skin is cylindrical burning things which may cause a fire disaster shell or sheath, follows the mobile orientation of buggy on some burning things which may cause a fire disaster shell or the sheath and is equipped with throat subassembly and flaring subassembly in proper order, is equipped with the clearance between throat subassembly and the flaring subassembly, the throat subassembly includes cyclic annular throat, the flaring subassembly includes cyclic annular flaring. The utility model provides a pair of ignition both can improve the concentration that the buggy was located to some burning things which may cause a fire disaster, simultaneously, can carry out the deceleration to the buggy, made the coal powder concentration of some burning things which may cause a fire disaster department and the velocity of flow do benefit to ignition operation, and the some burning things which may cause a fire disaster can more effectively be lighted the process and gather the pulverized coal air flow behind the whitewashed deceleration, improves the ignition effect.