硫酸生产系统大联锁优化改进实践

Improvement of large-scale interlock and optimization in sulphuric acid production plant

分析了硫精矿制酸系统中关键装置异常运行时存在的安全环保风险以及对后续工序的危害,通过对现用联锁系统的现场实际运行情况了解和电气控制技术分析,找出硫酸生产系统大联锁存在的设计缺陷和技术漏洞,最终在DCS控制系统的配合下对硫酸大联锁控制进行优化改进,既完善了硫酸大联锁系统的防护功能,又提高了生产装置运行的安全性和可靠性,避免了生产系统出现大范围的设备故障和对周边环境的严重污染,同时也保障了硫酸生产系统运行的连续稳定,降低生产成本,增加了一定的社会效益和经济效益。

Existing safety and environmental risk and damage on subsequent section during abnormal operation in key devices of sulphur concentrate roasting sulphuric acid plant are analyzed,by the knowledge of actual operation of interlock system on-site and analysis of electrical control,design deficiency and technical leak existing in large-scale interlock of sulphuric acid production plant were found. On the premise of coordination of DCS control system,large-scale interlock were optimized and improved,which not only perfected protection function of large-scale interlock,but also improved safety and reliability during production plant operation,avoiding large-scale device fault appearing in production system and pollution in surroundings,meanwhile,guaranteeing stable operation of sulphuric acid plant,reducing production cost,increasing social and economic efficiency.