高炉混喷自控系统的改进

Improvement of Automation Control System of BF Mixed Injection System

天铁集团2 800 m3煤粉混合喷吹自控PLC系统原有设计存在缺陷,在运行过程中,造成整体失控,严重影响生产。因此,针对所暴露的问题,确定将PLC系统改造为双机冗余系统,完善制粉连锁控制程序。并对有关热风切断阀、烟气放散阀、气动阀,仪表气源、报警装置等进行技术改造,还增加烟气炉膛灭火器,改造结果使喷煤系统稳定。

During running,the automatic PLC system of mixed coal injection system of 2 800 m3 BF,Tiantie was out of control as a whole due to design defect,which seriously affected production.In order to solve the found problems,the PLC system was decided to modify into a dual redundant system to improve the interlock control program for pulverized coal preparation.Other technical modifications were carried out on blast shut off valve,fume discharge valve,pneumatic valve,instrument air and alarm device and fume shaft fire distinguishers were added.Consequently,the coal injection system worked stably.