Open AccessCoolside waste management demonstration OCDO grant agreement No. CDO/D-902-9. Final report
Author(s) -
M.M. Wu,
R.A. Winschel
Publication year - 1997
Language(s) - English
Resource type - Reports
DOI - 10.2172/565653
Subject(s) - lime , waste management , flue gas , sulfur dioxide , fly ash , air preheater , coal combustion products , coal , anhydrous , environmental science , hazardous waste , flue gas desulfurization , combustion , boiler (water heating) , chemistry , engineering , materials science , metallurgy , inorganic chemistry , organic chemistry
The objectives of this project were to evaluate the potential utilization in road construction of wastes produced from the Coolside, LIMB (limestone injection multi-stage burner) and FBC (fluidized-bed combustion) processes, and to specify criteria for landfill disposal of waste from the Coolside process. These three processes are considered to be clean coal technologies. The Coolside process involves injecting an aqueous slurry of hydrated lime into the ductwork downstream of the air preheater in a coal-fired boiler. The hydrated lime captures sulfur dioxide from the flue gas producing anhydrous calcium sulfite and calcium sulfate, which are collected along with the unused hydrated lime and fly ash. The LIMB process involves injection of lime or hydrated lime directly into the furnace to capture sulfur dioxide. The waste consists principally of anhydrous calcium sulfate, lime, and fly ash. Both processes were demonstrated successfully at the Edgewater Station of Ohio Edison in Lorrain, OH, from 1989 to 1992. Circulating fluidized-bed combustion (FBC) is a commercial technology which combines steam generation with SO{sub 2} control by burning coal in a circulating bed of limestone. The waste, chemically similar to LIMB waste, is produced by bleed-off of the bed material and by collection of the flue dust. All three processes produce a dry solid waste, which must either be used or disposed of and managed to ensure environmental compliance and economic feasibility. The project was completed in June 1996