Taking a 600MW unit in North China with frequent excessive dust concentration as an example,the impact of burning inferior coal on the operation status of dust removal equipment was analyzed.At the same time,the reasons for the excessive dust concentration in the unit were comprehensively analyzed through performance test detection,operating parameters,equipment fault analysis and other means,and targeted improvement measures were taken.On the one hand,blending inferior coal increases the amount of ash in the flue gas,i.e.the amount of dust removal.On the other hand,it changes the characteristics of flue gas fly ash,making it difficult to capture and collect,thereby limiting the efficiency of dust removal.At the same time,problems such as air leakage in the dust collector's own equipment,single rapping strategy,inaccurate online instruments,and low power of high-voltage power supply have also jointly caused the dust concentration to exceed the standard.By conducting targeted equipment maintenance and operation optimization,the unit could achieve the emission requirement of dust concentration at the chimney inlet less than 5mg/m3,and provide operational reference for other units burning inferior coal.
coal fired power plantselectrostatic precipitatorfault analysisoptimize operationinferior coal
维普
万方数据
