Overview
The drying section, a crucial part of a
Paper Machine, is essential for paper production.
Structure
It mainly consists of drying cylinders, often made of cast iron or steel. Steam pipes supply heat to these cylinders, and a condensate drainage system removes condensed water. Hoods cover the cylinders to collect and exhaust moist air.
Working Principle
Steam heats the inside of the cylinders. When the wet paper contacts the cylinder surface, heat transfers to the paper, evaporating water. The hoods' air circulation system then carries away the water vapor.
Function
Its main task is to reduce the paper's moisture content to an appropriate level, usually 4% - 8%, after the press section. This improves paper strength, stiffness, smoothness, flatness, and dimensional stability.
