凝汽式电站锅炉排烟温度偏高对供电煤耗的影响

Calculation of the effect of increasing exhaust flue gas temperature of the main type utility boilers on standard coal consumption

在合理简化条件下,对国内凝汽式火力发电厂主流炉型亚临界、超临界、超超临界锅炉燃用大同烟煤、开滦烟煤、西山贫煤、阳泉无烟煤、元宝山褐煤的排烟温度升高引起供电煤耗提高的状况进行计算及分析。计算结果表明:当排烟温度升高5℃时,凝汽式电厂的供电煤耗提高约0.567～0.934g/kWh,当煤种相同时,过热蒸汽压力越高,排烟温度升高引起的供电煤耗提高幅度越小。

On the basis of reliable assumptions, calculations and analyses were made for the standard coal consumption of electric power supply of China condensing power plant. The coals are Yangquan anthracite, Xishan sub bitumin.ous coal,.Kailuan bituminous coal, Datong bituminous coal and Yuanbaoshan lignite, the calculation results reveals that with 5℃ increase of the utility boiler exhaust flue gas temperature, standard coal consumption of electric power supply increase O. 567 -O. 934g/kWh. While burning the same coal, the increase of standard coal consumption of power station on an account of exhaust flue gas temperatures will decrease.