Steady-State Modeling of Multi-Cylinder Dryers in a Corrugating Paper Machine

In this study, a steady-state model was developed to describe the paper drying process and to analyze pocket dryer conditions for a multi-cylinder fluting paper machine in Iran's Mazandaran Wood and Paper Industries. The machine has 35 cylinders grouped in three drying groups and the cylinders...

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Bibliographic Details
Published in:Drying technology 2015-09, Vol.33 (12), p.1474-1490
Main Authors: Ghodbanan, Shaaban, Alizadeh, Reza, Shafiei, Sirous
Format: Article
Language:English
Subjects:
Cylinders
Driers
Drying
Evaporation
Humidity
Industrial equipment
Mathematical models
Modeling
Multi-cylinder dryers
Paper drying
Paper machine
Paper machines
Pocket
Pulp & paper industry
Sorption
Sorption heat
Temperature
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Summary:In this study, a steady-state model was developed to describe the paper drying process and to analyze pocket dryer conditions for a multi-cylinder fluting paper machine in Iran's Mazandaran Wood and Paper Industries. The machine has 35 cylinders grouped in three drying groups and the cylinders are heated from the inside by steam. The model is based on the mass and energy balance relationships written for fiber, air, and water in the drying section. In this research, the heat of sorption and its variations with paper temperature and humidity changes have been taken into account. Temperature and moisture variation of the paper web and cylinder surface temperature in the machine direction were predicted by the proposed model. Also, temperature and humidity of air in the drying pockets and hood exhaust were estimated by the proposed model. Moreover, the model can predict the evaporation rate and specific drying rate with sufficient accuracy in comparison with the TAPPI standard. Finally, the main modeling parameters were compared with the available operating data and the effectiveness of the developed model was verified through validations.
ISSN:0737-3937
1532-2300
DOI:10.1080/07373937.2015.1020161