Evaluation of emissions and control technology for industrial stoker boilers. Final report, October 1977-October 1980

Technical Report · Fri May 01 04:00:00 EDT 1981

OSTI ID:5766447

Giammar, R D; Barnes, R H; Hopper, D R; Webb, P R; Weller, A E

The report gives results of a three-phase program to evaluate emissions and control technology for industrial stoker boilers. In Phase I, emission characteristics were determined for a variety of coals fired in a 200-kW stoker boiler. It was observed that significant amounts of sulfur were retained in the lignite and western subbituminous coals. Fuel nitrogen conversion to NO was found to be between 10 and 20%. In addition, a limestone/coal fuel pellet was developed and found effective in capturing 80% of the fuel sulfur. Phase II focused on identifying and evaluating potential control concepts. Using an 8-MW spreader stoker boiler, it was found that improved control of combustion air (i.e., underfire and overfire air) resulted in lower excess air operation (improved efficiency), reduced particulate loading, smoke, CO and NO emissions, and no effect on SO2 levels. The limestone/coal pellet (Ca/S=7) was successfully fired, achieving 75% SO2 reduction. In Phase III, the limestone/coal fuel pellet was refined. A pellet was produced that had physical properties that could survive an industrial coal handling system. This pellet (Ca/S=3.5) was fired in the 8-MW boiler, achieving sulfur captures of 50%. The cost of this pellet would add approximately $1/million Btu to the cost of the raw high-sulfur coal.

• Research Organization: McDonnell Douglas Astronautics Co., Los Angeles, CA (USA)
• OSTI ID: 5766447
• Report Number(s): PB-81-197873
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800 -- Coal
Lignite
& Peat-- Waste Management
42 ENGINEERING
424000 -- Engineering-- Pollution Control Equipment-- (1980-1989)
500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION CONTROL
ALKALINE EARTH METAL COMPOUNDS
BOILERS
CALCIUM COMPOUNDS
CALCIUM OXIDES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
COMBUSTION PRODUCTS
CONTROL
DESULFURIZATION
ELEMENTS
EMISSION
ENERGY SOURCES
EVALUATION
FLUE GAS
FOSSIL FUELS
FUEL FEEDING SYSTEMS
FUEL SYSTEMS
FUELS
GASEOUS WASTES
INDUSTRIAL WASTES
MATERIALS
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PELLETS
POLLUTION CONTROL
STOKERS
SULFUR
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
WASTES