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

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 ۴.۷ GJ/ton of paper and accordingly, the machine consumed about ۱.۷۱ 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 ۵۰% and ۴%, respectively. The results show that the steam used in the heat recovery system can be reduced by about ۰.۹۵ tons/h due to adjusting the supply air temperature to the optimum range, which corresponds to about a ۵.۲% reduction in energy input and ۴% improvement in dryer efficiency resulting nearly ۳۱,۰۰۰ savings per year. Also, the CO۲ emission due to gas use can be decreased by about ۹۲۵ tons/y.

کلیدواژه ها:

Paper drying ، Energy analysis ، Heat recovery ، Drying section ، Energy efficiency