Simulation of ash-forming compounds in the kraft recovery boiler
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Simulation of ash-forming compounds in the kraft recovery boiler. / Leppänen, A.; Välimäki, E.; Oksanen, A.
10th European Conference on Industrial Furnaces and Boilers. Porto, Portugal, 2015.Tutkimustuotos › › vertaisarvioitu
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TY - GEN
T1 - Simulation of ash-forming compounds in the kraft recovery boiler
AU - Leppänen, A.
AU - Välimäki, E.
AU - Oksanen, A.
PY - 2015
Y1 - 2015
N2 - 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.
AB - 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.
KW - kraft recovery boiler
KW - alkali metal
KW - fine particle
KW - deposition
KW - computational fluid dynamics
UR - http://www.cenertec.pt/infub/
M3 - Conference contribution
BT - 10th European Conference on Industrial Furnaces and Boilers
CY - Porto, Portugal
ER -