Comprehensive report to Congress: Clean Coal Technology program: Advanced cyclone combustor with integral sulfur, nitrogen and ash control

Technical Report · Sun Feb 01 04:00:00 EST 1987

OSTI ID:6828885

The proposed project is to demonstrate the performance, reliability, and suitability of the advanced, air-cooled, slagging cyclone combustor, developed by Coal Tech Corporation, in retrofit applications. The size of the combustor used in this project is directly suitable for some industrial boilers. However, additional scale-up to 100 million Btu/hour is necessary for use in larger boilers. This project will also confirm scale-up parameters; and, thus, the design for larger combustors, making the need for a separate demonstration of the 100 million Btu/hour unit unlikely. One difference between the Coal Tech unit and other combustors is the air cooling that promotes a higher wall temperature in the Coal Tech unit and affects the slag properties and sulfur emissions capture by the injected limestone. Another difference is the direction of coal injection that contributes to cyclonic action to enhance particle retention. Other combustors use water cooling and axial injection. Air cooling considerably simplifies the problem of combustor heat loss by also using the cooling air as combustion air. Unlike the Coal Tech unit, some slagging combustors allow the ash and reacted limestone to exit with the combustion gases. The use of this latter type of combustor in oil-fired boiler applications requires a large vessel for particle capture at the combustor exit. This doubles the length of the combustor, a feature that is undesirable, particularly in boiler retrofit applications where there is limited space.

• Research Organization: USDOE Assistant Secretary for Fossil Energy, Washington, DC
• OSTI ID: 6828885
• Report Number(s): DOE/FE-0077; ON: DE87005804
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000* -- Coal
Lignite
& Peat-- Combustion
20 FOSSIL-FUELED POWER PLANTS
200202 -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
42 ENGINEERING
421000 -- Engineering-- Combustion Systems
ADDITIVES
AIR POLLUTION CONTROL
BOILERS
BURNERS
CARBONACEOUS MATERIALS
CARBONATE ROCKS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
COMBUSTION
COMBUSTORS
COMMERCIALIZATION
CONTROL
CYCLONE COMBUSTORS
DEMONSTRATION PROGRAMS
ENERGY SOURCES
FOSSIL FUELS
FUELS
LIMESTONE
MATERIALS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PARTICULATES
POLLUTION CONTROL
RETROFITTING
ROCKS
SEDIMENTARY ROCKS
SLAGS
STAGED COMBUSTION
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
THERMOCHEMICAL PROCESSES