System for controlling the flow pattern of a recovery boiler
AssigneeOy Polyrec AB
InventorErik Uppstu
Life of this patent
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Abstract
The invention relates to a 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, so-called secondary combustion air ports (5) disposed above these, black liquor spray nozzles (6) placed similiarly above these and combustion air ports (5b) disposed above the black liquor spray nozzles (6). According to the invention, the soda recovery boiler is provided with substantially thin jets (7, 7a, 7b) supplying energy into the flow field and having a jet pressure in the nozzle equal to at least twice the jet pressure in the combustion air ports (5, 5b).
Claims10
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 (5b) above the black liquor spray nozzles (6), characterized in that, in addition to the combustion air ports (5, 5b) disposed above and below the black liquor spray nozzles (6), the soda recovery boiler is provided with substantially thin jets (7, 7a, 7b) supplying energy into the flow field and having a jet pressure in the nozzle equal to at least 100 mbar to 6 bar.
Dependencies are inferred from the claim text.