Method and arrangement in cooling medium circulation of a recovery boiler

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United States of America Patent

PATENT NO 6047649
SERIAL NO

08617575

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Abstract

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The object of the present invention is a method in cooling medium circulation, whereby the recovery boiler comprises a furnace limited by wall tubes provided with cooling medium circulation and substantially horizontal floor tubes; a supply system for combustion air; and a supply system for black liquor, whereby a so-called smelt layer is formed in a combustion process on the floor composed of the floor tubes. At least in some of the floor tubes, at least on a section of their length, is arranged a longitudinal flow--particularly a spiral flow--for mixing the liquid and steam phases of the cooling medium.

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Patent Owner(s)

Patent OwnerAddress
KVAERNER POWER OYKELLOPORTINKATU 1 D TAMPERE 33100

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kuukkanen, Kari Nokia, FI 7 18
Mantyniemi, Jussi Tampere, FI 3 20

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