Improvement of energy efficiency and heat recovery performance within the paper machine drying section

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

doi:10.22061/jcarme.2024.8365.2128

Articles in Press

Document Type : Research Paper

Authors

¹ Chemical Engineering Faculty, Sahand University of Technology, Tabriz

² Chemical Engineering Faculty, Sahand University of Technology

³ No. 393 Ghaziyar Alley, Bahar Street

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

Abstract

In this study the energy assessment and heat recovery analysis of 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 per ton of paper and accordingly, the machine consumed about 1.71 tons steam per ton of produced paper. The temperature efficiency of the heat exchanger and recovering efficiency of the heat recovery system of the paper machine have been determined to be about 50% and 4%, respectively. The results show that the steam use in the heat recovery system can be reduced by about 0.95 ton/h due to adjusting the supply air temperature to the optimum range, which corresponds to about 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 about 925 tons per year.

Graphical Abstract

Keywords

Main Subjects

Energy Science and Technology

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