GAS-DISTRIBUTING HEARTH PF ROASTING ZONE OF MULTIZONE FLUIDIZED BED FURNACE FOR ROASTING OF LIMESTONE

摘要

FIELD: constructions of fluidized bed furnaces for endothermic roasting of polydispersed materials and grained carbonate rocks, applicable in metallurgical, chemical and construction branches of industry.;SUBSTANCE: the gas-distributing hearth of the roasting zone of multizone fluidized bed furnace for roasting of limestone is set up of burners. Each burner is made in the form of an air scoop with a central hole, in which a gas-delivery pipe with a side hole is installed with a clearance. The air scoops are made perforated. The gas-delivery pipes are installed for coaxial displacement. The effective linear parameter of the hearth P=(N·D₁·D₂·D₃ /D₄·D₅·D₆)^1/3 makes up 0.14 to 1.42, where N=(J·D² ₁/D² ₀)^1/3 - linear coefficient of perforation of air scoops; J=n·D² ₀/D² ₁-free cross-sectional area of the hearth; n-quantity of holes in the scoops, D₀-diameter of scoop holes; D₁-hearth diameter; D₂-diameter of the gas-delivery pipe; D₃ - diameter of particles of roasted limestone; D₄ - distance between the gas-delivery pipes; D₅ - diameter of the scoop; D₆ - distance between the centers of the scoops.;EFFECT: reduced specific consumption of fuel and cost of lime.;4 cl, 1 dwg, 1 tbl