STUDY OF BOILER DRUM LEVEL CONTROL SYSTEM USING DCS AND PLC PROJECT REPORT

Abstract

A boiler system is an integral component of a process plant, and control of the water level in the drum of the boiler system is a critical operational consideration.The major dynamics of boiler water level includes nonlinearities,nonminimum phase behaviour,instabilities,time delay and load disturbances. A low water level in the drum will cause loss of flow of water to tubes and causes its overheating leading to susequent failure,A high water level will cause water to be carried over into the turbines and causing it failure due to thermal stress problem. Due to interaction of the steam flow and changing pressure in the drum, the water level can be difficult to control and typically requires sophisticated control techniques.Therefore accurate water level measurement must be made and transmitted to the control system.This paper present the control system on water level of drum boiler using PID controller.