Fluidized bed systems

US4276062A · kind A · utility

Assignee

• The United States of America as Represented by the Administrator of the U.S. Environmental Protection Agency · US

Inventors

• David L. Lyon · Cambridge, US
• Gerald Moss · West Sand Lake, US

Key dates

• Filing date: May 19, 1977
• Grant date: Jun 30, 1981
• Expiry date: May 19, 1997

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S48/04
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A selected fraction of solid particles having sizes, densities and/or weights in a selected range is separated from a mixture of articles by fluidizing the mixture in a bed using a fluidizing fluid to cause particles including the selected fraction to pass out of the top of the bed; conveying the particles in a conveying fluid to a suitable separator (e.g. a cyclone) wherein the selected particles fraction is separated from smaller, lighter particles; injecting the separated fraction from the separator into a utilization zone (e.g. a fluid bed reactor); entraining other particles in the conveying fluid to another separator (e.g. a cyclone) to produce solids-free conveying fluid which is recirculated for re-use. The original particles mixture may be obtained by separation (e.g. in a cylone) from fluid leaving the utilization zone.