R D for the storage, transport, and handling of coal-based fuels

Technical Report · Mon Jan 01 00:00:00 EST 1990

OSTI ID:5530294

The product of several advanced physical coal cleaning processes is a dry, ultrafine coal (DUC), in the order of 10 microns mean mass diameter. To utilize this fuel commercially, cost-effective, environmentally safe systems must be provided for the storage, transport, and handling of this finely divided form of fuel. The objective of this project is the development of total logistics systems for DUC, including experimental verification of key features. The systems to be developed will provide for safe, economic, and environmentally protective storage and delivery of DUC for residential, commercial, and industrial uses. This quarter, the rotary feeder for the Residential Tank is being modified because of jamming which occurred during shakedown testing with poly methlymethacrylate particles; shear stress measurements (Jenkie shear cell) indicate that Upper Elkhorn DUC has a higher solids strength than Wyodak coal and will be more difficult to handle. Upon consolidation, the Illinois No. 6 coal with asphalt binder becomes much stronger than either of the other coals and is expected to be the most difficult to handle. Deaeration tests indicate that the deaeration (rate at which a fluidized bed losses its gas content) is strongly influenced by the moisture content of the coal. Experiments have shown that the pickup velocity (i.e., the gas velocity at which particles at the bottom of a horizontal pipe are entrained) is a function of Froude number. The relatively high gas velocities for pickup are caused by the surface forces acting among the fine particles of coal. 17 figs.

• Research Organization: Westinghouse Electric Corp., Pittsburgh, PA (United States). Advanced Energy Systems Div.
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC22-89PC89797
• OSTI ID: 5530294
• Report Number(s): DOE/PC/89797-T2; ON: DE91016807
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL
MATERIALS HANDLING
STORAGE
ADHESION
FLUIDIZATION
FUEL SLURRIES
PROGRESS REPORT
SHEAR
TRANSPORT
CARBONACEOUS MATERIALS
DISPERSIONS
DOCUMENT TYPES
ENERGY SOURCES
FOSSIL FUELS
FUELS
MATERIALS
MIXTURES
SLURRIES
SUSPENSIONS
013000* - Coal
Lignite
& Peat- Transport
Handling
& Storage
010600 - Coal
Lignite
& Peat- Properties & Composition