Methods of improving productivity of black liquor recovery boilers

US6408771B1 · kind B1 · utility

Assignees

• Air Liquide America Corporation · US
• American Air Liquide, Inc. · US
• L'Air Liquide, Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Georges Claude · FR
• Jansen Combustion and Boiler Technologies, Inc. · US

Inventors

• Louis C. Philippe · Oakbrook Terrace, US
• Eric Duchateau · Versailles, FR
• David R. Scheeff · Marietta, US
• Arie Verloop · Kirkland, US
• Edward C. Dye · Bothell, US

Key dates

• Filing date: Sep 9, 1999
• Grant date: Jun 25, 2002
• Expiry date: Sep 9, 2019

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E20/34
• WIPO field: Thermal processes and apparatus
• WIPO sector: Mechanical engineering

Abstract

Methods are presented to increase the throughput of a recovery boiler equipped with at least primary and secondary levels of injection of air. The methods comprise operating the recovery boiler with a third level of oxidant injection below or at the same level as the secondary level, and oxygen enrichment applied to at least the secondary level and said third level.