Method and arrangement in cooling medium circulation of a recovery boiler
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United States of America Patent
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-
Apr 11, 2000
Grant Date -
N/A
app pub date -
Mar 19, 1996
filing date -
Mar 22, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
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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