METHOD FOR BURNING IN ELECTRIC PLANT BOILER Russian patent published in 1996 - IPC

FIELD: burners of boilers of electric power plants. SUBSTANCE: method involves feeding minimal part of primary air to heat exchanger where it is heated before running to burners 25 a-c, where it is mixed and burnt with fuel 12 or another mix. Another air flow as secondary air 27 is supplied to preliminary combustion chamber 24 directly. This process is performed before connection of preliminary combustion chamber 24 to boiler 22. Third air flow is supplied down from chamber 24 to boiler 22. This results in possibility to fed air into two stages and boiler operates under conditions of deficient air. EFFECT: decreased number of nitrogen- containing compounds. 3 cl, 6 dwg