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US 11,549,682 B2Granted
Furnace floor protection in recovery boilers
AssigneeVaro Teollisuuspalvelut Oy
InventorTimo Karjunen
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Abstract
A method and apparatus for protecting a furnace floor of a black liquor recovery boiler, where the furnace floor is covered by a protective layer, the protective layer being formed of a salt mixture including at least two different salts.
Claims18
A method for protecting a furnace floor of a furnace of a black liquor recovery boiler, comprising:
- providing a mixture comprising at least two different salts, the mixture having a melting point lower than respective melting points of the at least two different salts;
- covering an emptied furnace floor by a layer formed of the mixture comprising the at least two different salts within an aqueous solution;
- and
- allowing the mixture comprising the at least two different salts to precipitate from the aqueous solution thereby forming a protective layer to protect the furnace floor,
- wherein the covering step is performed during an outage of the recovery boiler, before start-up of the recovery boiler.
2 more elements
Dependencies are inferred from the claim text.