Energy system diagnosis of paper-drying process, Part 2: A model-based estimation of energy-saving potentials. Issue 10 (26th July 2016)

• Record Type: Journal Article
• Authors: Chen, Xiaobin; Li, Jigeng; Liu, Huanbin; Yin, Yongjun; Zhang, Yanzhong
• Is Part Of: Drying technology. Volume 34:Issue 10(2016)
• Page Start: 1219
• Page End: 1230
• Publication Date: 2016-07-26
• Subjects: Energy analysis -- energy-saving potentials -- mathematical modeling -- paper drying; Drying -- Periodicals; Desiccation; 660.28426
• DOI: 10.1080/07373937.2015.1095206
• Languages: English
• ISSNs: 0737-3937

Abstract

ABSTRACT: The pulp and paper sector is the fourth largest industrial sector in terms of energy use in the world. Of the numerous processes involved in paper-making by a paper machine, the dryer section is the process that consumes the largest amount of energy. A model-based method for estimating energy-saving potentials of the dryer section was put forward in the present study. It was done by four steps: establishing a mathematical model about energy consumption, determining the model parameters, benchmarking the drying performance to obtain the corresponding energy-saving measures, and estimating the energy-saving potentials by using the mathematical model. In a case study, a multi-cylinder dryer section was selected to illustrate the method. After a fundamental field test and observation, several operating problems that restricted the energy performance of paper drying were found. And then several reasonable energy-saving measures were suggested to the operators. Finally, applying the mathematic model, it was found that 0.32 ton of steam will be saved when producing 1 ton of paper in recommended operating conditions. With the designed capacity of 200, 000 tons/year, the annual steam-savings will be 64, 000 tons. Generally, the price of steam is 130–150 Chinese Yuan (about US$21–24) in China, and the annual economic benefits will be 8.32–9.60 million Chinese Yuan (about US$1.344–1.536 million).