Keywords

alkali-salt deposition modeling, particle formation and deposition, recovery boiler combustion modeling

Abstract

Algorithms for alkali-salt deposition have been implemented into a comprehensive model for recovery boilers. The model includes (a) mechanisms for particle formation and chemistry, (b) particle deposition and adhesion, and (c) deposit thermal properties. These algorithms are fully coupled with models for turbulent flow, black liquor combustion, and heat transfer in the boiler. Model predictions for particle deposition in the convection pass are presented for a Babcock & Wilcox recovery boiler. This work is part of an ongoing project sponsored by the U.S. Department of Energy to demonstrate an improved ability to anticipate ash behavior with changes in fuel composition, operating conditions, and boiler design.

Original Publication Citation

Comprehensive model of alkali–salt deposition in recovery boilers, Solutions! & TAPPI JOURNAL, February 2003, Vol. 2(2) (421KB)