HIGH PRESSURE THROUGH AIR DRYER AND OPERATION THEREOF

摘要

A method of dewatering a fiber web in a paper machine, includes the steps of: dewatering the fiber web in a forming section to a solids content of greater than approximately 10%; displacement pressing the fiber web in an air press assembly to a solids content of greater than approximately 40%; and through air drying the fiber web in at least one air press assembly to a higher solids content. An evaporative drying process and equipment for drying a paper web include pressurizing a zone to greater than at least about 0.5 psi, moving the web through the zone, and passing heated air through the web in the zone to evaporate moisture from the web.