制粉及一次风系统节能优化改造

Energy-saving Optimization and Retrofit of Pulverizing and Primary Air System

为了降低辅助系统对厂用电的损耗,对制粉系统和一次风系统进行诊断、节能优化改造。改造结果显示:在同等煤粉细度的前提下磨煤机出力可提高20%; 300 MW正常运行工况下修正后的锅炉效率为91. 06%,230 MW正常运行工况下修正后的锅炉效率为91. 31%,分别比改造前提高了1. 81%、1. 7%,发电煤耗平均下降了2. 4 g/kW·h,每年可节约费用367. 6万元,经济效益显著。

In order to reduce the loss to the plant powerof auxiliary system,the diagnosis and energy saving optimization of pulverizing and primary air system are carried out.The retrofit results show that the output of the coal mill can be increased by 20% under the premise of the same fineness of pulverized coal;the corrected boiler efficiency is 91.06% under a normal operating condition of 300 MW,and the corrected boiler efficiency under a normal operating conditions of 230 MW is 91.31%,respectively,increased by 1.81% and 1.7% compared to the unmodified;the coal consumption for power generation decreased by 2.4 g/kw·h on average,and the annual cost savings was 3.676 million yuan,which is a significant economic benefits.