The Yankee dryer is a large, steam-heated, pressure vessel that is used in the production of tissue grades. During production, high pressure steam is supplied to the inside of the dryer to heat the shell and dry the sheet, and the condensate that forms must then be removed. This course describes the steam distribution and condensate removal equipment found in a Yankee dryer. It then discusses how the steam pressure inside the dryer is controlled, how thermocompressors operate, and two common methods used to control the flows of steam and condensate through a Yankee dryer.
• Describe the design of the Yankee dryer
• Describe steam distribution equipment and flows inside dryer
• Identify how condensate is removed from the dryer
• Describe pressure controls in and around the Yankee dryer
