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Magazine articles
Integrated study of flue gas flow and superheating process in a recovery boiler using computational fluid dynamics and 1D-process modeling, TAPPI Journal June 2020
ABSTRACT: Superheaters are the last heat exchangers on the steam side in recovery boilers. They are typically made of expensive materials due to the high steam temperature and risks associated with ash-induced corrosion. Therefore, detailed knowledge about the steam properties and material temperature distribution is essential for improving the energy efficiency, cost efficiency, and safety of recovery boilers. In this work, for the first time, a comprehensive one-dimensional (1D) process model (1D-PM) for a superheated steam cycle is developed and linked with a full-scale three-dimensional (3D) computational fluid dynamics (CFD) model of the superheater region flue gas flow. The results indicate that: (1) the geometries of headers and superheater platens affect platen-wise steam mass flow rate distribution (3%•7%); and (2) the CFD solution of the 3D flue gas flow field and platen heat flux distribution coupled with the 1D-PM affect the platen-wise steam superheating temperature (45%•122%) and material temperature distribution (1%•6%). Moreover, it is also found that the commonly-used uniform heat flux distribution approach for the superheating process is not accurate, as it does not consider the effect of flue gas flow field in the superheater region. These new observations clearly demonstrate the value of the present integrated CFD/1D-PM modeling approach.
Journal articles
Shop talk: improving dryer performance: converting to stationary siphons with turbulence bars, TAPPI JOURNAL, April 1999, Vol. 82(4)
Shop talk: improving dryer performance: converting to stationary siphons with turbulence bars, TAPPI JOURNAL, April 1999, Vol. 82(4)
Journal articles
Relationship between phenol-formaldehyde resin chemistry and paper saturation, TAPPI JOURNAL, August 1999, Vol. 82(8)
Relationship between phenol-formaldehyde resin chemistry and paper saturation, TAPPI JOURNAL, August 1999, Vol. 82(8)
Journal articles
Wet reinforcement of paper with high-molecular-weight multifunctional carboxylic acid, TAPPI JOURNAL, August 1999, Vol. 82(8)
Wet reinforcement of paper with high-molecular-weight multifunctional carboxylic acid, TAPPI JOURNAL, August 1999, Vol. 82(8)
Journal articles
Some mechanistic insights for using the streaming current detector to measure wet-end charge, TAPPI JOURNAL, August 1999, Vol. 82(8)
Some mechanistic insights for using the streaming current detector to measure wet-end charge, TAPPI JOURNAL, August 1999, Vol. 82(8)
Journal articles
Signature of recalcitrant stickies in recycle newsprint, TAPPI JOURNAL, December 1999, Vol. 82(12)
Signature of recalcitrant stickies in recycle newsprint, TAPPI JOURNAL, December 1999, Vol. 82(12)
Journal articles
Evaluation of apmp and bctmp for market pulps from south american eucalyptus, TAPPI JOURNAL, December 1999, Vol. 82(12)
Evaluation of apmp and bctmp for market pulps from south american eucalyptus, TAPPI JOURNAL, December 1999, Vol. 82(12)
Journal articles
Treatment of edta-containing pulp and paper mill wastewaters in activated sludge plants, TAPPI JOURNAL, February 1999, Vol. 82(2)
Treatment of edta-containing pulp and paper mill wastewaters in activated sludge plants, TAPPI JOURNAL, February 1999, Vol. 82(2)
Journal articles
A new stickies test method - statistically sound and user friendly, TAPPI JOURNAL, February 1999, Vol. 82(2)
A new stickies test method - statistically sound and user friendly, TAPPI JOURNAL, February 1999, Vol. 82(2)
Journal articles
Shop talk: dryer grinding in mills producing packaging and graphics paper, TAPPI JOURNAL, February 1999, Vol. 82(2)
Shop talk: dryer grinding in mills producing packaging and graphics paper, TAPPI JOURNAL, February 1999, Vol. 82(2)