Coal as a Supplemental Heat Source in Sludge Incineration

Rising fuel prices and possible curtailment of fuel supplies have prompted the Metropolitan Waste Control Commission (MWCC) of the Minneapolis/St. Paul area to examine the use of coal and other solid combustibles as supplemental heat sources for multiple-hearth sludge incineration. With a constant f...

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Bibliographic Details
Published in:Journal - Water Pollution Control Federation 1979-01, Vol.51 (7), p.1897-1903
Main Authors: Swanson, Gary J., Bergstedt, Dale C.
Format: Article
Language:English
Subjects:
Coal
Cost estimates
Cost savings
Fuel combustion
Fuel oils
Incinerators
Metropolitan areas
Sludge
Smoke
Solid fuels
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Summary:Rising fuel prices and possible curtailment of fuel supplies have prompted the Metropolitan Waste Control Commission (MWCC) of the Minneapolis/St. Paul area to examine the use of coal and other solid combustibles as supplemental heat sources for multiple-hearth sludge incineration. With a constant feed rate. low-sulfur lump coal was added to dewatered sludge being fed to the furnace, reducing incinerator oil requirements by about 70%. With full-scale retrofit of the $7.57\times 10^{4}\text{-}{\rm m}^{3}/{\rm d}$ treatment plant, total annual costs for coal supplemental feeding would be $161 000, but oil savings $240 000.
ISSN:0043-1303