Patent ID: 7069866

Claim:
System for controlling the flow field in a soda recovery boiler, said soda recovery boiler comprising at least a furnace ( 1 ), primary air ports ( 4 ) in the lower part of the furnace, combustion air ports ( 5 ) disposed above these, black liquor spray nozzles ( 6 ) placed similarly above these and combustion air ports ( 5 b ) above the black liquor spray nozzles ( 6 ), characterized in that, in addition to the combustion air ports ( 5 , 5 b ) disposed above and below the black liquor spray nozzles ( 6 ), the soda recovery boiler is provided with substantially thin jets ( 7 , 7 a , 7 b ) supplying energy into the flow field and having a jet pressure in the nozzle equal to at least 100 mbar to 6 bar.