Influence of coal mineral matter on slagging of utility boilers. Final report

Technical Report · Sun Jun 01 04:00:00 EDT 1980

DOI:https://doi.org/10.2172/5285557· OSTI ID:5285557

Hazard, H. R.

In an experimental project to explore the role of coal minerals in boiler slagging and fouling, five tangentially fired boilers having different slagging experiences and fired with different coals were studied. Temperatures and compositions of furnace gas were measured, samples of pulverized coal, furnace ash, and fly ash were collected and analyzed, boiler ash deposits were observed, and operating data were recorded. Marked differences were found in compositions and fusion properties of ash from different coal density fractions. For two slagging coals, 35 and 50 percent respectively, of the total ash was found in the coal fractions heavier than 1.6 sp. gr, and the viscosity of ash in these fractions at 2300/sup 0/F was extremely low. Ash in lighter coal fractions was of high viscosity and should not cause slagging problems. The dense fractions of three non-slagging coals had no comparable low-viscosity ash. In parallel studies of furnace deposit structure, it was found that glassy spherical particles forming much of the deposit were similar in composition to ash found in individual coal particles, so that they could be formed without interaction between particles.

• Research Organization: Battelle Columbus Labs., OH (USA)
• OSTI ID: 5285557
• Report Number(s): EPRI-CS-1418
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600 -- Coal
Lignite
& Peat-- Properties & Composition
20 FOSSIL-FUELED POWER PLANTS
200101* -- Fossil-Fueled Power Plants-- Cooling & Heat Transfer Equipment & Systems
AEROSOL WASTES
ASHES
BOILERS
CARBONACEOUS MATERIALS
CHEMICAL COMPOSITION
COAL
DATA
DATA FORMS
DEPOSITS
ENERGY SOURCES
EXPERIMENTAL DATA
FLY ASH
FOSSIL FUELS
FOSSIL-FUEL POWER PLANTS
FOULING
FUELS
GRAPHS
INFORMATION
MELTING
MINERALS
NUMERICAL DATA
PHASE TRANSFORMATIONS
POWER PLANTS
RESIDUES
SLAGS
TABLES
THERMAL POWER PLANTS
VISCOSITY
WASTES