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Simulation of ash-forming compounds in the kraft recovery boiler

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Details

Original languageEnglish
Title of host publication10th European Conference on Industrial Furnaces and Boilers
Place of PublicationPorto, Portugal
Number of pages10
ISBN (Electronic)978-972-99309-7-3
Publication statusPublished - 2015
Publication typeA4 Article in a conference publication
EventEuropean conference on industrial furnaces and boilers -
Duration: 1 Jan 1900 → …

Conference

ConferenceEuropean conference on industrial furnaces and boilers
Period1/01/00 → …

Abstract

This paper presents a summary of the doctoral dissertation titled “Modeling Fume Particle Dynamics and Deposition with Alkali Metal Chemistry in Kraft Recovery Boilers”. In the thesis, a computational model was developed and used to simulate the behavior of alkali metal compounds in kraft recovery boilers. The model combines, for the first time, the methods of CFD (Computational Fluid Dynamics), equilibrium chemistry, and fine particle dynamics to model the formation and deposition of fume particles. Fume particles are below 1 μm in diameter and form through the condensation of the alkali metal compounds. The model has been partially validated in an operating recovery boiler in terms of fume particle composition, but the modeling results also shed light on processes that cannot be investigated through experimental methods alone. For example, the modeling results indicate that thermophoresis is the main factor leading to fume deposit formation.

Keywords

  • kraft recovery boiler, alkali metal, fine particle, deposition, computational fluid dynamics

Publication forum classification

Field of science, Statistics Finland