Ash deposition at coal-fired gas turbine conditions; Surface and combustion temperature effects

Journal Article · Wed Jan 01 04:00:00 EST 1992 · Journal of Engineering for Gas Turbines and Power; (United States)

DOI:https://doi.org/10.1115/1.2906295· OSTI ID:5358615

Richards, G A; Logan, R G; Meyer, C T; Anderson, R J ^[1]

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1. U.S. Dept. of Energy, Morgantown Energy Technology Center, Morgantown, WV (US)

In this paper a study of ash deposition from a cleaned bituminous and conventional bituminous coal is presented. An electrically heated drop tube furnace is used to burn the coal and provide deposition conditions representative of proposed coal-fired gas turbines. Variations in the combustion temperature and deposit surface temperature demonstrate that surface cooling may significantly reduce ash deposition, or may provide little benefit, depending on the combustion conditions. Lower temperature combustion produced larger ash particles, with a greater fraction of ash adhering to the deposition test surface. Although the sticking coefficient was higher at the lower combustion temperature, the deposits were readily removed. A modest numerical simulation suggests that the smallest ash particles can experience significant boundary layer cooling and may account for the reduction in sticking observed at some conditions.

• OSTI ID: 5358615
• Journal Information: Journal of Engineering for Gas Turbines and Power; (United States), Journal Name: Journal of Engineering for Gas Turbines and Power; (United States) Vol. 114:1; ISSN JETPE; ISSN 0742-4795
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000* -- Coal
Lignite
& Peat-- Combustion
20 FOSSIL-FUELED POWER PLANTS
200100 -- Fossil-Fueled Power Plants-- Power Plants & Power Generation
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800 -- Combustion
Pyrolysis
& High-Temperature Chemistry
42 ENGINEERING
420400 -- Engineering-- Heat Transfer & Fluid Flow
ASHES
BITUMINOUS COAL
BLACK COAL
CARBONACEOUS MATERIALS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COAL
COAL-FIRED GAS TURBINES
COMBUSTION
COMBUSTION KINETICS
COMBUSTION PRODUCTS
DEPOSITS
ENERGY SOURCES
EQUIPMENT
FOSSIL FUELS
FUELS
GAS TURBINES
KINETICS
MACHINERY
MATERIALS
NUMERICAL SOLUTION
OXIDATION
PARTICLE SIZE
REACTION KINETICS
RESIDUES
SIZE
TEMPERATURE EFFECTS
THERMOCHEMICAL PROCESSES
TURBINES
TURBOMACHINERY