Coal fired furance
Tangential firing system
Method of firing a pulverized fuel-fired steam generator
Method of reducing NOx and SOx emission
Fine particulate feed system for fluidized bed furnace
Tempering air heating on pulverizing high moisture fuels
Method and apparatus for operating a vortex bed furnace
Overfire air admission with varying momentum air streams
Method of and apparatus for the desulfurization of flue gas of a coal-fired combustion process
ApplicationNo. 06/792392 filed on 10/29/1985
US Classes:110/347, Burning pulverized fuel110/264, Having rotary flow means110/265, Having secondary air mixing means110/345Exhaust gas; e.g., pollution control, etc.
ExaminersPrimary: Yuen, Henry C.
Attorney, Agent or Firm
International ClassesF23L 9/02 (20060101)
F23J 7/00 (20060101)
F23L 9/00 (20060101)
AbstractEmissions of sulfur oxides produced during combustion of a sulfur-bearing fossil fuel in a furnace chamber 10 are reduced by injecting a sulfur oxide absorbing particulate into the product gases in an upper region 60 of the furnace chamber. The sulfur oxide absorbing material is dispersed into a quantity of air which is introduced in the furnace chamber through a plurality of nozzles 80, 82 and 84 disposed at different elevations. The air streams with entrained absorbent are introduced at each elevation tangent to an imaginary circle, with the radii of the circles of the elevations being different, thereby distributing the sulfur oxide absorbent over a wide volume of the furnace chamber.