600MW锅炉热一次风旁路装置改造分析

Retrofitted analysis of hot primary air by-path of 600MW boile

通过4#锅炉热一次风旁路系统改造后试验和理论分析证明,4#锅炉在采用热一次风旁路装置后,降低排烟温度1.5℃以上;同时,通过提高磨煤机出口风粉温度3℃,降低锅炉排烟温度1.5℃以上。达到了降低锅炉排烟温度3℃以上的效果,年节约运行费用200万元以上。同时对热一次风旁路系统改造工作进行总结,并依据试验结果对旁路风门的操作方式以及该技术的推广提出了若干建议。

Through experimental and theoretical analysis after No4 boiler hot primary air bypass transformation proof,after uses the hot primary air bypass installment,the exit gas temperature was decreased above 1.5℃.Simultaneously,through enhances the outlet temperature of pulverizer(3℃),the exit gas temperature was decreased above 1.5℃.Grand total the exit gas temperature was decreased above 3℃,every year saved above the operating cost two million Yuan.