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Gaseous Emissions from the Co-combustion of Wet Sludge and Coal

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Co-combustion with coal in coal-fired boilers has been developed rapidly as an effective treatment method for sewage sludge. Sometimes wet sludge is directly used for co-combustion. Harmful gas emission from the co-combustion was investigated in an isothermal tube furnace. Results showed that the CO, SO2, and NOx emissions from the co-combustion had no large increase compared with coal mono-combustion when the blending ratio of wet sludge was 10–50%. When the blending ratio of wet sludge was 30%, the gaseous emission was lowest and the conversion rates of S to SO2 and N to NOx were 1.6 and 1.1%, respectively.
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Keywords: co-combustion; coal; flue gas; sewage sludge

Document Type: Research Article

Affiliations: 1: Graduate School at Shenzhen, Tsinghua University, Shenzhen, China 2: School of Environment, Tsinghua University, Beijing, China

Publication date: October 2, 2015

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