FURNACE Russian patent published in 2002 - IPC

FIELD: power-generating boilers. SUBSTANCE: invention relates to devices for combustion of different fuels, including pulverized coal and high reaction fuels (gas and fuel oil). According to invention pulverized fuel-air and air nozzles are installed in staggered order in width of two walls in furnace provided with lower guard and vertical section of rectangular combustion chamber. Geometric axes of nozzles installed on larger walls are pointed to intersection of larger plane of symmetry of combustion chamber with uniform horizontal pitch. Horizontal projections of geometric axes of air nozzles are directed square to larger walls of combustion chamber and those of pulverized fuel-air nozzles, at angle to the walls equal to arcs B/4S where S is mounting pitch of like nozzles in width of each larger wall and B is distance between nozzles. Pulverized fuel-air nozzles, except extreme ones, are provided with two compartments arranged one over the other being pointed in opposite directions in horizontal projection. Extreme pulverized fuel-air nozzles are pointed to side of central zone of combustion chamber. EFFECT: improved efficiency of combustion of fuel provision of suppression of formation of nitrogen oxides in fuel furnace. 2 cl, 2 dwg