Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With regeneration – reclamation – reuse – recycling or...
Patent
1987-12-04
1990-01-02
Chin, Peter
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With regeneration, reclamation, reuse, recycling or...
162301, 162 36, 162 49, 162DIG10, 110187, 110238, D21C 712, D21C 1112
Patent
active
048910970
ABSTRACT:
The invention relates to a method of regulating, for the purpose of burning soda-ash in a recovery boiler furnace, the feeding-in or combustion conditions of concentrated spent liquors of varying chemical and physical properties by measuring some physical property of a liquor fed into the recovery boiler furnace and by regulating the feeding-in and combustion conditions directly on the basis of the thus measured physical properties. According to the invention, the maximum swelling, upon heating, of a dry-matter particle of the liquor fed into the recovery boiler furnace is measured. On the basis of this measurement the temperature, pH value, or injection pressure of the liquor fed into the furnace, or the height of the injection point or the direction of injection, or the feeding of air into the furnace is adjusted directly on the basis of the maximum swelling measurement.
REFERENCES:
patent: 4042328 (1977-08-01), Seymour
patent: 4498955 (1985-02-01), Nelson
Hyoty Paavo
Saiha Erik
Uppstu Erik
Chin Peter
Dang Thi
OY Tampella AB
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