Dryer syphon

US5020243A · kind A · utility

Assignee

• MacMillan Bloedel Limited · CA

Inventors

• George B. Miller · Hingham, US
• John G. Sanderson · Burnaby, CA

Key dates

• Filing date: Dec 1, 1989
• Grant date: Jun 4, 1991
• Expiry date: Dec 1, 2009

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F26B13/183
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The perimeter and height of an inlet gap to a dryer syphon shoe (for a steam heated dryer drum) are selected to provide an area which at maximum design condensate flow rate accommodates both condensate and steam flows and in proportions and at speeds that will ensure distributed flow of the steam and condensate while maintaining efficient dryer operation. A plate is positioned inside of the shoe and combines with an inside wall of the shoe to define a transition passage leading from the gap wherein flow is axial of the drum to the condensate return pipe where flow is substantially radial of the drum. The transition passage has a cross sectional area measured substantially perpendicular to the direction of flow that is substantially equal to or less than the area of the inlet gap, provides a smooth transition for the flow between the gap and the condensate return pipe and insures distributed flow through the syphon.