Fire detection for conveyor-belt entries. Rept. of Investigations/1991

Technical Report · Tue Jan 01 00:00:00 EST 1991

OSTI ID:5509920

Litton, C D; Lazzara, C P; Perzak, F J

The report details the results of a series of large-scale experiments where small coal fires were used to ignite conveyor belting at air velocities ranging from 0.76 m/s to 6.1 m/s. In the tests, electrical strip heaters imbedded within a pile of coal were used to heat the coal to a point of flaming ignition. The flaming coal subsequently ignited conveyor belting located approximately 5 to 10 cm above the coal pile. During the tests, temperature, CO, and smoke levels were continuously measured in order to determine both alarm time and level as the fire intensity progressed through the stages of smoldering coal, flame coal, and flaming coal plus flaming belt. Analysis of the data leads to certain conditions of air velocity and sensor alarm levels that are required for early detection of conveyor belt entry fires. Two nomographs are presented which define sensor alarm levels and sensor spacings as a function of belt entry cross-sectional area and belt entry air velocity.

• Research Organization: Bureau of Mines, Pittsburgh, PA (United States). Pittsburgh Research Center
• OSTI ID: 5509920
• Report Number(s): PB-92-152107/XAB; BUMINES-RI-9380
• Resource Relation: Other Information: See also PB83-197087 and PB89-225262. Library of Congress catalog card no. 91-23342
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
BELT CONVEYORS
FIRES
AIR FLOW
ALARM SYSTEMS
CARBON MONOXIDE
COAL
COAL MINES
DETECTION
FIRE DETECTORS
FIRE HAZARDS
IGNITION
MONITORING
SENSITIVITY
SMOKES
TEMPERATURE MEASUREMENT
AEROSOLS
CARBON COMPOUNDS
CARBON OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
COLLOIDS
CONVEYORS
DISPERSIONS
ENERGY SOURCES
EQUIPMENT
FLUID FLOW
FOSSIL FUELS
FUELS
GAS FLOW
HAULAGE EQUIPMENT
HAZARDS
MATERIALS
MATERIALS HANDLING EQUIPMENT
MINES
OXIDES
OXYGEN COMPOUNDS
RESIDUES
SOLS
UNDERGROUND FACILITIES
016000* - Coal
Lignite
& Peat- Health & Safety