基于S7-300的蒸汽动能磨控制系统设计

Control System Design for Jet Mill with Superheated Steam Based on S7-300

介绍了以过热蒸汽为动力的蒸汽动能磨加工超细粉体的生产工艺,根据生产工艺要求设计了控制系统。控制系统主要包括控制系统硬件结构及控制方案。系统硬件结构采用以S7-300可编程逻辑控制器(PLC)为下位机对生产现场进行数据采集和自动控制,通过PROFIBUS总线与上位机通讯,上位机采用WINCC组态软件实现远程监控。控制方案详细讨论了蒸汽动能磨磨机料位控制、高温除尘器温度控制、高温除尘器喷吹控制、系统就地/远程控制以及故障急停等关键技术。控制系统经调试,能够精确监测控制除尘器温度、动能磨磨机料位等物理量。系统运行稳定、可靠,实现了就地操作与远程监测控制,大大提高了蒸汽动能磨加工超细粉体生产效率与可靠性。

The paper introduced the production process of ultra-fine powders with superheated steam-powered jet mill. According to the process requirement of the system, the control system was designed, which mainly consists of system hardware structure and control scheme. In the hardware structure, S7-300 programmable logic controller （PLC） was used as the lower computer used, which communicated with the upper computer by PROFIBUS, to collect data and control automatically, The remote monitor was realized by the upper computer with WINCC configuration software. In the control scheme, some key techniques such as the hold up control of jet mill, the temperature control of high temperature bag filter, the pulse jet control of high temperature bag filter, on-site and remote control of system and fault scram were discussed in details. The temperature of filter and material level of mill can be monitored and controlled accurately after the control system was debugged, the whole system ran stably and reliably, the on-site and remote control of the key facilities was realized and it improved the reliability and the efficiency of ultra-fine powders by using superheated steam-powered jet mill.