Attrition and elutriation phenomena in industrial atmospheric fluidized bed combustors
Attrition and elutriation in large-scale AFBC systems depend on the design of the feed system, bed hydrodynamics and freeboard cooling. At present, no generalized correlation exists to predict these effects. It is suggested that routine solid samples for size analysis be taken before the solids enter the bed. In this way, correlations can be developed to predict the attrition in the feed system and in the bed separately. Secondly, data on the solids loading in the freeboard should be taken and related to bubble size, bubble velocity, bubble frequency and bed expansion. Such information can be obtained in a cold bed for lack of measuring techniques in hot beds. Accurate rate expressions for attrition and elutriation specific to coal ash, limestone, and char can then be developed to predict the performance of AFBC systems.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 5382954
- Report Number(s):
- CONF-800545-1
- Resource Relation:
- Conference: International powder and bulk solids conference and exhibition, Rosemont, IL, USA, 13 May 1980
- Country of Publication:
- United States
- Language:
- English
Similar Records
Natural-sorbent attrition and elutriation characteristics in fluidized-bed coal combustors
Tennessee Valley Authority atmospheric fluidized-bed combustor simulation interim annual report, January 1-December 31, 1980
Related Subjects
42 ENGINEERING
COAL
FLUIDIZED-BED COMBUSTION
FLUIDIZED-BED COMBUSTORS
ABRASION
ELUTRIATION
MATHEMATICAL MODELS
PARTICLES
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COMBUSTION
COMBUSTORS
ENERGY SOURCES
FOSSIL FUELS
FUELS
OXIDATION
SEPARATION PROCESSES
THERMOCHEMICAL PROCESSES
014000* - Coal
Lignite
& Peat- Combustion
421000 - Engineering- Combustion Systems