针对某1 000 MW燃煤机组开展污泥掺烧性能试验研究，分析机组负荷、污泥含水率、掺烧比例等对机组能耗的影响。为核算入炉燃煤的消耗率，定义了燃煤耦合污泥发电机组的燃煤耗率。结果表明：机组掺烧污泥使得混合燃料品质下降，导致锅炉效率降低且厂用电率上升，从而造成机组供电燃料耗率增加，其中，排烟热损失和固体未完全燃烧热损失增加是造成锅炉效率降低的主要原因，风机系统和脱硫系统电耗上升则是造成厂用电率上升的主导因素；随着机组负荷的降低、污泥含水率的增加和污泥掺烧比例的增加，机组供电燃煤耗率变化量呈现明显增加趋势，当机组掺烧污泥含水率为40%、掺烧比例为4%时机组供电燃煤耗率降低0.921 g/(kW·h)，当机组掺烧污泥含水率≥60%时机组供电燃煤耗率呈现增加趋势。

The performance experimental study of cofiring sludge was conducted in a 1 000 MW coalfired power unit.The effects of unit load, sludge moisture content and blending proportion on energy consumption of power unit were analyzed. In order to calculate the coal consumption rate in the furnace, the coal consumption rate of the sludgecoupled power unit was defined.The results show that cofiring coal and sludge decrease the quality of the blended fuel, leading to the reduction of the boiler thermal efficiency, the increase of the auxiliary power consumption rate, and the increase of the fuel consumption rate of unit.The reduction of the boiler thermal efficiency is primarily caused by the increase of sensible heat loss in exhaust flue gas and unburned carbon heat loss in residue.The increase of auxiliary power consumption rate is mainly due to the increases of power consumption rates of the fan system and desulfurization system. With the reduction of unit load and the increase of sludge moisture content and blending proportion, the variation of net coal consumption rate increases obviously.〖JP2〗The net coal consumption rate is reduced by 0.921 g/(kW·h) when the sludge moisture content is 40% and the blending proportion is 4%.The net coal consumption rate shows an increasing trend when the sludge moisture content is no less than 60%.

X701

国家自然科学基金创新研究群体项目（51621005）