莱钢120t转炉干法除尘系统优化改造实践

Optimal Modification Practice of Dry Cleaning System for Laiwu Steel’s 120t Converter Flue Gas

针对莱钢120t转炉干法除尘系统使用实践中存在的电除尘器泄爆率高、设备故障率高、蒸发冷却器喷嘴性能差、生产维护成本高、烟气含尘量波动大等问题进行了系统分析,并采用防泄爆技术、蒸发冷却器喷嘴改进技术、系统整体切换技术、备件国产化技术等对系统进行优化改造,大大提高了系统运行安全,设备故障率为零,煤气含尘量稳定在8mg/m3以下,降低生产成本4元/t,年直接经济效益达1700万元。

This paper analyzed systemically the existent problems in the use practice of dry cleaning system for Laiwu Steel＇ s 120 t converter flue gas. These problems include high explosion venting rate of electrostatic precipitator, high equipment failure rate, poor performance of evaporative cooler nozzle, the production of high maintenance costs, large fluctuation of the dust contained in the flue gas and other issues. Though adopting anti-explosion venting technology, improved technology for evaporative cooler nozzle, system whole switching technology and spare parts domestically produced etc the optimal modification for the dry cleaning system was carried out. Then the operation safety of the system was enhanced largely, the equipment failure rate was zero, the dust contained in the flue gas stabilized at 8 mg/m^3, production cost was reduced by 4 Yuan per ton and the direct economic benefits were 17 000 thousand Yuan per year.