Experiments on cofiring dried sewage sludge, wet sewage sludge with coal and polyethylene (PE) were carried out on a pilot scale\r\n0.15MWt circulating fluidized bed combustion (CFBC) plant, and the influence of furnace temperatures, cofiring rates on N2Oand\r\nNO emissions was investigated. Temperature is an effective parameter influencing N2O emission, and higher temperature leads to\r\nsignificant N2O reduction and decrease of conversion ratio of fuel-N to N2O. Increasing in cofiring rates leads to higher nitrogen\r\ncontent in the mixed fuel,which could result in higherNOandN2Oemissions fromcombustion.Withmore sewage sludge addition,\r\nhigherNObut lowerN2Oemissions are observed.N2Oemission fromcofiring wet sewage sludge with coal is higher than that from\r\ncofiring dried sewage sludge with coal and PE, and fuel-N conversion ratio to N2O and NO is much higher in cofiring wet sewage\r\nsludge with coal than that in cofiring dried sewage sludge with coal and PE.
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