Drying and gas or vapor contact with solids – Apparatus – Rotary drums or receptacles
Patent
1989-12-01
1991-06-04
Bennett, Henry A.
Drying and gas or vapor contact with solids
Apparatus
Rotary drums or receptacles
34124, F26B 1308
Patent
active
050202430
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.
REFERENCES:
patent: 4384412 (1983-05-01), Chance et al.
patent: 4516334 (1985-05-01), Wanke
patent: 4606136 (1986-08-01), Pflug
patent: 4718177 (1988-01-01), Haeszher
`A Model for Predicting Regime Transition in Horizontal and Near Horizontal Gas-Liquid`, AlChe Journal (vol. , No. 1), Jan. 1976, pp. 47-54, Taitel and Dukler of the Department of Chemical Engineering, University of Houston.
`A Study of Two-Phase Flow in Inclined Pipes`, Beggs et al., Journal of Petroleum Technology, May 1973, pp. 607-617.
Miller George B.
Sanderson John G.
Bennett Henry A.
MacMillan Bloedel Limited
Rowley C. A.
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