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针对沼气发酵过程无法精确控制,容易发生沼气产量降低等问题,本文设计了沼气发酵过程状态监控系统。该系统以西门子S7-1200 PLC为控制核心,建立基于SIMATIC NET OPC的以太网通信网络,实现沼气发酵过程的实时监控。在分析存储的过程数据基础上,结合经验知识与沼气发酵工艺判断与发布异常情况,提醒运行人员采取应对措施,降低风险。运行结果表明:该系统具有可靠性强、操作方便和准确性高等特点,完全满足沼气发酵的各项控制要求。
In view of the biogas fermentation process can not be precisely controlled, easy to produce biogas output and other issues, this paper designed biogas fermentation process condition monitoring system. The system takes Siemens S7-1200 PLC as the control core and establishes the Ethernet communication network based on SIMATIC NET OPC to realize the real-time monitoring of biogas fermentation process. On the basis of analyzing the stored process data, combining with the experience knowledge and biogas fermentation technology, we can judge and release the anomalies and remind the operators to take countermeasures to reduce the risks. The results show that the system has the characteristics of high reliability, convenient operation and high accuracy, which can fully meet the control requirements of biogas fermentation.