摘要
某电厂针对2×600 MW超临界机组所采用的中速辊式磨煤机结构特点,进行提高磨煤机出口温度试验,以达到降低锅炉排烟温度,提高机组经济性的目的。首先委托试验单位通过实验室分析计算得出了提高磨煤机出口温度的可行性,然后在电厂进行现场调试,电厂试验表明,磨煤机出口温度提高到100℃不仅是安全可行的,而且有一定的安全余量,磨煤机内不会产生CO。通过试验,磨煤机出口温度由80℃提高到100℃,排烟温度下降了6.1℃,锅炉效率提高了0.31%,发电煤耗下降1 g/kWh。每年可节约标煤7500 t以上,且基本无成本投入,直接经济效益约600万元。
According to the structural features of the roller ring mills,experiments of improving the outlet temperature were conducted to reduce the exhaust gas temperature and improve the unit's economy.First,the feasibility of the improvement of the outlet temperature was studied by the entrusted unit,then the debugging was conducted in the power plant.The rusults showed,the outlet temperature raised to 100℃ had certain safety margin,and no CO generation.When the outlet temperature raised from 80℃ to 100℃,the exhaust gas temperature reduced 6.1℃,the boiler efficiency raised 0.31%,and the coal consumption reduced 1g/kWh.It can save the standard coal more than 7500 t/a and $6 million,and with no cost input,it can save $6 million.
出处
《能源工程》
2012年第5期60-64,共5页
Energy Engineering
