Acta Scientiarum: Technology (May 2000)
Aplicação da metodologia de curvas generalizadas à secagem de papel
Abstract
Aspects in the drying of paper (cellulose) sheets over a heated surface under natural convection condition inside an oven are provided. Three different operational situations are carried out: (1) for initial paper moisture contents: sheets of only one hand sheet of paper, drying temperature of 100ºC and initial moisture content from 130 to 180% (dry basis - d.b.); (2) for drying temperature: sheets of only one hand sheet of paper, initial moisture content of about 150% (d.b.) and drying temperature from 50 to 110ºC; (3) for sheet thickness: drying temperature of 100ºC, initial moisture content of about 150% (d.b.) and multi-layer sheets of one to five hand sheets of paper. The influence of these variables in drying curves behavior is studied through the theory of generalized drying curves, analyzed individually for each effect and for all together. Finally, the possibility of fitting them is discussed
