Design of an Automated Control System for Boilers Water Treatment Unit of Kenana Sugar Company

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.