Improving energy efficiency and heat recovery performance in paper machine drying section

Ghodbanan, Shaaban; Alizadeh, Reza; Shafiei, Sirous; Rahbar Shahrouzi, Javad

doi:10.22061/jcarme.2024.8365.2128

Document Type : Research Paper

Authors

¹ Chemical Engineering Faculty, Sahand University of Technology, Tabriz

² Chemical Engineering Faculty, Sahand University of Technology, Tabriz, Iran

https://doi.org/10.22061/jcarme.2024.8365.2128

Abstract

In this study, the energy assessment and heat recovery analysis of the multi-cylinder drying section were carried out in a fluting paper machine. The specific heat consumption per unit of paper was determined to be about 4.7 GJ/ton of paper and accordingly, the machine consumed about 1.71 tons of steam per ton of produced paper. The temperature efficiency of the heat exchanger and the recovering efficiency of the heat recovery system within the paper machine have been determined to be about 50% and 4%, respectively. The results show that the steam used in the heat recovery system can be reduced by about 0.95 tons/h due to adjusting the supply air temperature to the optimum range, which corresponds to about a 5.2% reduction in energy input and 4% improvement in dryer efficiency resulting nearly 31,000 $ savings per year. Also, the CO₂ emission due to gas use can be decreased by about 925 tons/y.

Graphical Abstract

Keywords

Main Subjects

Energy Science and Technology

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