Abstract:
In the rapid development of flexible automation and the broad application
of computer technology, industrial monitoring software has played an
integral role in all kinds of industrial areas. It allows operators to monitor
and control a plant in real-time with feedback from any number of
processes.
The primary objective of this thesis is to develop an automatic control
system for Kenana boilers water conditioning plant using Siemens
simatic S7-300 Programmable Logic Controller (PLC) system in order to:
ensure the optimum chemical dosing to avoid boilers tubes corrosion,
reducing the operation cost by dosing the suitable amount of chemical
according to PH & conductivity situations, to protect the boiler by
supplying free water from sugar contaminants, and to assist in producing
good quality steam.
The system has been designed and the control program has been written
in ladder format, and checked by PLCSIM simulator software, the
program include (Automatic blow down, Boiler PH control, and
Automatic dumping system).
The communication between the plant and control system is built using
Siemens WINCC SCADA , so the operators could achieved all control
tasks through Human Machine Interface (HMI) screen pages.
