600MW机组磨煤机增速改造及性能分析

内蒙古京隆发电有限责任公司机组实际燃用煤种的热值偏离设计值较大,机组负荷在540 MW以上时6台磨煤机必须全部投入运行,常出现机组出力受限、无备用磨煤机的情况。针对此问题,对1号炉C磨进行了增速改造,将磨煤机转速从24.2 r/min提升至30.0 r/min后,磨煤机出力由64.66 t/h提高到77.6 t/h(约增加了20%)。性能试验结果表明,改造后磨煤机运行状态良好,解决了机组出力受限、无备用磨等问题。

Coal Mill Renovation on 600 MW Unit by Increasing Speed and Its Performance Analysis

Because the actual using coal type deviated from the designed one greatly, six coal mills should be put into operation when the unit load was above 500 MW in Inner Mongolia Jinglong Power Generation Co.,Ltd.,resulted in that there was no backup mill and the unit output was limited. To solve the problems, a speed increasing project had been carried out on a coal mill of No.1 unit in Inner Mongolia Jinglong Power Generation Co.,Ltd. After the coal mill speed was increased to 30.0 r/min from 24.2 r/min, the coal mill output reached 77.6 t/h from 64.66 t/h, increased by 20%. Performance test results showed that, after the transformation of coal mill,the machines ran in good condition, solved the unit output was limited,and no standby mill problems.