Stoker test evaluations using clean pellet fuel

Technical Report · Wed Oct 01 04:00:00 EDT 1980

OSTI ID:6529055

Marlowe, W H; Brody, C W; Ban, T E; Nelson, C J

A chain-grate stoker at the powerhouse of the Ohio State Reformatory was modified for use of clean pellet fuel for combustion demonstrations. Clean pellet fuel for the Mansfield tests was prepared from a series of production test runs at the Cleveland Research Center using relatively high sulfur industrial coal ranging from about 3.1 to 4.5% sulfur. Accordingly, pellets of a relatively high sulfur content were produced. Also, sulfur fixation in the pellets for the Mansfield tests was not as extensive as that from the Massillon tests. Subsequent small scale bench tests and prior pilot plant tests showed how this could be improved if necessary by use of alkaline additions. Table A provides a summary of modifications made on the Mansfield stoker along with the outcome and general observations. Through the use of the developed firing system stack conditions invariably remained free of visible emissions and black, sooty type smoke was not observed, verifying the smokeless nature of the fuel. Optimum conditions apparently exist for (a) ideal ignition, (b) sulfur emission minimization, and (c) particulate emission minimization. These reported test runs had the primary objective of demonstrating the capability of the fuel to continuously ignite and fire using a stoker-boiler designed for normal bituminous coal operating under a range of firing conditions. This was adequately demonstrated; however, the test runs were of insufficient duration to attain optimum firing conditions for all environmental control measures. Nevertheless, extensive sulfur and particulate arresting was evident and compliance conditions are attainable for more than about 75% of the counties of Ohio using coal that exceeds 3 1/2% sulfur for production of clean pellet fuel.

• Research Organization: McDowell-Wellman Co., Cleveland, OH (USA). Dwight-Lloyd Research Labs.
• OSTI ID: 6529055
• Report Number(s): NP-4901791; ON: TI84901791
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000* -- Coal
Lignite
& Peat-- Combustion
ADDITIVES
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
COMBUSTION
DATA
ELEMENTS
EMISSION
ENERGY SOURCES
EXPERIMENTAL DATA
FABRICATION
FEDERAL REGION V
FOSSIL FUELS
FUEL FEEDING SYSTEMS
FUEL SYSTEMS
FUELS
INFORMATION
MATERIALS
MODIFICATIONS
MOLDING
NONMETALS
NORTH AMERICA
NUMERICAL DATA
OHIO
OXIDATION
PELLETIZING
RETENTION
STATE GOVERNMENT
STOKERS
SULFUR
THERMOCHEMICAL PROCESSES
USA