Recovery boiler
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United States of America Patent
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Jun 30, 1998
Grant Date -
N/A
app pub date -
Dec 17, 1996
filing date -
Jun 20, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A recovery boiler for combusting spent liquor from cellulose cooking while at the same time recovering chemicals. The recovery boiler is constructed for so-called 'rotafire' combustion and the speed of rotation of the secondary air has been increased by a constriction of the boiler being arranged at the tertiary air level. The invention also includes a process for using the boiler which is based on certain ports through which the secondary air is blown in being provided with air which is at a higher pressure than that at the other ports on the same level, thereby achieving a higher inflow velocity than from the other ports.
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