NDLI: Treatment of Sydney Tar Pond Sludge in CFBC

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Jia, L. Anthony, E. J. Turnbell, Richard
Copyright Year	2005
Abstract	Test burns of mixtures of Sydney tar pond sludge and coal were carried out using CETC’s mini-circulating fluidized bed combustor (mini-CFBC). The goal was to determine if CFBC technology could be used to treat the tar pond sludge. During the tests, CO2, O2, CO, SO2, and NOx in the flue gas were monitored continuously. Stack gas sampling was carried out for HCl, metals, particulate matter, VOCs, total hydrocarbons, semi-volatile organic compounds, dioxins and furans and PCBs. Results showed that HCl, Hg, particulate matter, PCDD/Fs and metal concentrations were all below both the current limits and the gas release limits to be implemented in 2008 in Canada. Sulphur capture efficiency was about 89–90%. The percentage of fuel nitrogen converted to NOx was of the order of 4.7 to 6.1, which is significantly lower than that of conventional pulverized coal-fired boilers and well within normal range of FBC boilers. PCB and PAH emissions levels were comparable or lower than levels reported in the literature for industrial-scale FBCs. VOC concentrations were low except for benzene, for which the concentration was higher than that reported for utility-scale FBC and pulverized coal-fired boilers. In addition, CO concentration was high at 1200 to 2200 ppm. However, these CO concentrations are typical of CETC’s mini-CFBC firing coal. The trials showed that, for 10% by weight tar pond sludge mixed with 90% by weight coal, the combustion was both stable and efficient. The tests demonstrated that CFBC technology could be an environmentally sound option for eliminating wastes from the Sydney tar pond.
Sponsorship	Advanced Energy Systems
Starting Page	911
Ending Page	915
Page Count	5
File Format	PDF
ISBN	0791841839
DOI	10.1115/FBC2005-78123
e-ISBN	0791837556
Conference Proceedings	18th International Conference on Fluidized Bed Combustion
Language	English
Publisher Date	2005-05-22
Publisher Place	Toronto, Ontario, Canada
Access Restriction	Subscribed
Subject Keyword	Firing Fluidized bed combustion Metals Carbon dioxide Boilers Combustion Fuels Nitrogen Emissions Benzene Particulate matter Weight (mass) Coal Nitrogen oxides Flue gases Combustion chambers Sulfur Fluidized beds Organic compounds
Content Type	Text
Resource Type	Article

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