Kvaerner Pulping Technologies Ab

Anders Palmgren

The invention relates to a recovery boiler for combustion of waste liquors. It comprises a furnace whose base and walls include a multiplicity of liquid-cooled tubes and whose base (21) constitutes a collection point for inorganic substances in molten form, with air and waste liquor being introduced into the furnace and the combustion gases being conveyed upwards in the boiler. The invention is characterized essentially in that the cross-sectional area of the furnace at a first lower level (1) exceeds the cross-sectional area of the furnace at a second level (2) higher up in the furnace.

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Ytterby, Sweden

Anders Palmgren