We can provide PLC monitoring and controlling system for the complete waste - biogas - energy plant. A complete PLC system is composed of two parts: Hardware modules and software modules. It can realize the real-time monitoring and automatic/manual controlling of the whole project. Real-time understanding of the operation status of the whole project helps improve the precision of regulating and controlling, to increase the efficiency of biogas production and stability of plant running.
Hardware:
Sensor, PLC controller, Actuator, Network communication module, PC, etc.
Software:
PLC software, on-site configuration software, Internet remote control software, etc.
The sensors and PLC are serial-communication connected. The sensors collect data from different points of the entire plant and convert these physical values into analog, then transfer them to PLC channel. The PLC collects and process these analog signals from the channel terminals transmitted by the sensors and store in the database for analysis.
The implementing Mechanism is divided into Automatic and Manual operations:
-Automatic mode:
The system receives PLC instructions combined with order from principal computer, to achieve the purpose of automatic controlling and regulating;
-Manual mode.
Staff manually operate the machine&devices according to the working status indicated on the computer or MMI;
According to the project process, data collecting points can come from:
1, Anaerobic tank:
Temperature, pH, liquid level, gas tank pressure, ORP, etc;
2, Biogas storage:
Gas components, flow, pressure, temperature, etc;
3, Biogas treatment:
Pressure, temperature, liquid level, flow, gas components, water dew point, etc.
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