is used to burn black liquor from sulphate pulping for recovery of inorganic chemicals as well as for energy production.
An important process step in the production of kraft pulp. A special boiler, where the black liquor from the cooking process is burned, after concentrating it in an evaporation process. The residual carbon is burned and the inorganic sodium salts are melted and recovered.
Steam boiler specially designed for the kraft recovery process. The recovery boiler uses strong black liquor as fuel and supplies heat for steam generation and recovers the inorganic cooking chemicals in molten form. Synonym: Recovery furnace.