Spray combustion device and the black liquor combustion boiler using the same of black liquor

摘要

PURPOSE:To operate a black liquor combustion boiler at a high temperature under a high pressure and reduce the amount of dust sticking to heat transfer tubes by forming a collision plate into nearly a circular, elliptical or fan shape and providing a fluid resistance means in the peripheral part on the collision plate in the jetting flow direction of the black liquor. CONSTITUTION:A black liquor jetting nozzle body 14 in a tilted state is joined to a collision plate 16 in a circular, elliptical or fan shape and a weir-shaped protrusion member 17 is provided in the tip part on the side of a furnace of the collision plate 16. Jetting streams of the black liquor on the collision plate are divided into mist droplet streams of the black liquor having nearly the uniform size to disperse the formed mist droplet streams of the black liquor almost evenly in the circumferential direction of the collision plate. Cut groove parts in the shape of left and right symmetric weir shape, etc., may be provided in place of the protrusion member 17 or plural left and right symmetric cut groove parts or protrusion members may be readily provided. Alternatively, the collision plate itself may be provided with plural left and right symmetric radial bent parts.