烧结变频主抽风机改造实践  

Practice of Variable Frequency Drive Retrofit for the Main Exhaust Fans in Sintering Process

作　　者：刘洋 范旭庚 杜建华 Liu Yang;Fan Xugeng;Du Jianhua(Shougang Jingtang United Iron&Steel Co.,Ltd.,Tangshan 063009)

机构地区：[1]首钢京唐钢铁联合有限责任公司炼铁作业部,河北唐山063009

出　　处：《冶金设备》2024年第4期107-110,共4页Metallurgical Equipment

摘　　要：为实现烧结工序对主抽风量的精确控制,降低主抽风机耗电量。某钢铁厂对烧结系统中的4台主抽风机进行了变频驱动改造,将风机由原有的变频启动切换工频旁路的运行模式改造为全变频驱动的形式。通过改造方案优化,供电、励磁、控制等方面的设计改进,并合理安排产线检修停机期间的施工和调试,在保证烧结生产线正常生产组织的情况下,顺利完成设备升级改造,并保留原有系统作为应急启动的后备措施。改造后,实现了烧结工序主抽风量的精确控制,风机变频运行显著提高了节电率。同时,烧结矿质量有效改善,烧结吨耗达到行业领先水平。In order to precisely control the main exhaust air volume in the sintering process and reduce power consumption of the main exhaust fans,variable frequency drive(VFD)retrofit was carried out for four main exhaust fans in the sintering system of an iron and steel plant.The operating mode of the fans was converted from the original variable frequency soft start and switching to line frequency to full VFD operation.Through optimization of the VFD scheme,reconstruction of the power supply,excitation,and control systems,and proper arrangement of installation and commissioning during the production line maintenance outage,the equipment upgrade was smoothly completed under the prerequisite of ensuring normal sintering production.The original system was retained as emergency backup.After the retrofit,precise control of the main exhaust air volume in the sintering process was achieved.The power saving rate of the fans under VFD operation was significantly improved.Meanwhile,the sinter quality was effectively enhanced and the sintering energy consumption reached an industry-leading level.

关 键 词：烧结 主抽风机 同步电机 变频 

分 类 号：TM921.51[电气工程—电力电子与电力传动]