Fire and explosion hazards in fluidized-bed thermal coal dryers

Technical Report · Fri Jan 01 00:00:00 EST 1965

OSTI ID:5326092

Schrecengost, H A; Childers, M S

Fire and explosion hazards are inherent in certain types of coal dryers in that (1) high temperatures are employed, (2) the sizes and volatility of material handled are capable of propagating explosions, and (3) drying gases are seldom, if ever, low enough in oxygen content to prevent ignitions of dust clouds, distilled gases, or their combinations. This is especially true for fluidized-bed dryers in which the coal is dried in air suspension and in which atmospheric gas is constantly introduced to temper the heat furnace gases. Occurrence of fires on heated bedplates, in dust collectors, and in hot gas inlets was common in nearly all the dryers examined. Forceful explosions which produced external effects had occurred in 11 (39 percent) of the plants examined and internal ''puffs'' or ''bumps'' had occurred in at least 24 (79 percent).

• Research Organization: Bureau of Mines, Washington, D.C. (USA)
• OSTI ID: 5326092
• Report Number(s): BM-IC-8258
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL PREPARATION
DRYERS
EXPLOSIONS
FIRES
COAL
DRYING
DUST COLLECTORS
DUSTS
FLUIDIZED BED
HAZARDS
IGNITION
OXYGEN
VAPORS
CARBONACEOUS MATERIALS
CRYOGENIC FLUIDS
ELEMENTS
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUELS
GASES
NONMETALS
013000* - Coal
Lignite
& Peat- Transport
Handling
& Storage