Development of a vortex-containment combustor for coal-combustion systems. Report for January 1980-December 1983 (Final)
This report describes the development of a vortex-containment combustor (VCC) for coal-combustion systems, designed to solve major problems facing the conversion of oil- and gas-fired boilers to coal (e.g., derating, inorganic impurities in coal, and excessive formation of NOx and SOx). The system would: have a high firing density, separate and retain fly ash, and be adaptable to viable pollution-control technologies. An extensive literature review and tests of two candidate isothermal systems preceded the design and construction of a bench-scale VCC. Coal-combustion tests were performed on the VCC to evaluate its performance in terms of ash-retention efficiency, coal burnout, combustion stability, and slag and ash deposition. Results were very promising for both retention efficiency and combustion stability. Fuel-injector modifications improved internal slag-deposition conditions while maintaining acceptable carbon burnout levels. NOx control by staging and reburning technologies was evaluated in the VCC, along with sorbent injection for the control of SO/sub 2/ emissions. Both staging and reburning were effective in reducing NOx emissions in the VCC. Improvements in the sorbent injection approach are required to obtain an acceptable degree of SO/sub 2/ reduction. Based on particle force balance expressions, scaling criteria have been established for the VCC.
- Research Organization:
- Energy and Environmental Research Corp., Irvine, CA (USA)
- OSTI ID:
- 6086994
- Report Number(s):
- PB-89-180921/XAB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
014000* -- Coal
Lignite
& Peat-- Combustion
42 ENGINEERING
421000 -- Engineering-- Combustion Systems
AIR POLLUTION CONTROL
BENCH-SCALE EXPERIMENTS
BOILERS
CARBONACEOUS MATERIALS
CHALCOGENIDES
COAL
COMBUSTION CHAMBERS
COMBUSTORS
CONTROL
DESIGN
DIAGRAMS
DOCUMENT TYPES
EFFICIENCY
ENERGY SOURCES
ENGINEERING DRAWINGS
FOSSIL FUELS
FUEL SUBSTITUTION
FUELS
MATERIALS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
POLLUTION CONTROL
PROGRESS REPORT
SULFUR COMPOUNDS
SULFUR OXIDES