永磁驱动调速技术在引风机改造中的应用

摘要

通过对液力耦合调速器、变频调速器和永磁驱动调速器优缺点的比较，决定采用永磁驱动调速技术对某电厂锅炉引风机进行改造，并对改造后的经济效益和安全性能进行了分析.改造后，机组运行振幅下降83％，噪音降幅35％，机组每年可节省费用60．9万元，不到2年就可收回投资，风机经济性、安全可靠性显著提高.%By analyzing the advantages and disadvantages of the variable-frequence governor,hy-draulic coupling governor and the permanent magnet drive speeder,the permanent magnet speed control technology was applied to conduct retrofit for induced draft (ID)fans in boiler of a power plant.After the transformation,the unit can save 609 000 yuan per year,meaning the investment can be recovered within less than two years;the vibration amplitude of the air fan decreased by 83%,and the noise dropped by 35%.