High solids firing in an operating recovery boiler - comparison of CFD predictions to practical observations in the furnace

Esa Vakkilainen, Lars Kjäldman, Veikko Taivassalo, Pia Kilpinen, Tommy Norström

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

    20 Citations (Scopus)

    Abstract

    Three-dimensional flow simulation was applied to analyze the high solids firing processes in a 3 150 tds/d recovery boiler. The flow field, combustion, heat transfer, and the concentration of nitric oxide (NO) were modeled with the commercial Fluent/UNS code using strong local refinement of the computational grid. For prediction of nitric oxide (NO) emissions a postprocessing technique was used. Different simplified ammonia oxidation mechanisms available were tested. The study shows that this kind of modeling can be successfully applied to a 3 150 tds/d recovery boiler. In addition, the possibilities to reduce the NOx emission by odorous gas firing (reburning) in the recovery boiler furnace are discussed based on one-dimensional calculations.
    Original languageEnglish
    Title of host publication1998 International Chemical Recovery Conference
    Place of PublicationAtlanta
    PublisherTAPPI Press
    Pages245-256
    ISBN (Print)978-0-89852-716-2
    Publication statusPublished - 1998
    MoE publication typeB3 Non-refereed article in conference proceedings
    Event1998 TAPPI International Chemical Recovery Conference - Tampa, United States
    Duration: 1 Jun 19984 Jun 1998

    Conference

    Conference1998 TAPPI International Chemical Recovery Conference
    Country/TerritoryUnited States
    CityTampa
    Period1/06/984/06/98

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