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Fire in a Pulverized Coal Pipe in a Power Plant

A fire broke out in a coal pulverizer in a 110 MW coal-fired power plant. An APTECH power plant engineer was hired by the insurance adjuster to evaluate the origin and cause of the fire. The equipment was thoroughly inspected and photographed. The plant's operation and maintenance personnel were interviewed, and work orders, drawings and other documentation were reviewed on site. We found that a modification to the coal/air piping had been done improperly, which caused the failure of an expansion joint. The resulting jet of pulverized coal caught fire, and this flame ignited common combustibles. Damage to the plant was considerable, and subrogation potential was assessed.

Satish Almaula		Plant failure and root cause analysis; process and design engineering analysis; process technology development and testing; plant engineering, operations, maintenance and safety management; plant and process control system management.

Kimble Clark, Ph.D.		Failure analysis, heat transfer & thermodynamics, process plant equipment failures & explosions, fuel science, combustion, industrial fires and explosions.

Richard Schreiber, P.E.		Machinery and mechanical device failure analysis, mechanical testing, combustion and heat transfer, industrial fires and explosions, gas appliances.

Eric Sullivan, P.E.		Metallurgy, welding, failure analysis, fire and explosion investigations, equipment, piping.