METHOD AND APPARATUS FOR PREVENTING EROSION OF COAL BUCKETS

摘要

An improved nozzle tip (10) for a pulverized coal-fired burner for preventing erosion of the inner surface of the inner shell (12) through which the pulverized coal-air stream passes after discharging from coal delivery pipe (20) before entering the furnace. A portion of the air stream passing through annular duct (26) in the region of the interface between coal delivery pipe (20) and the inner shell (12) is diverted to form a layer of coal-free air along the inner surface of inner shell (12).