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Abstract
Boiler is a machine that produces steam from the water resulting from combustion of fuels such as fiber, coal, black oil, gas, and diesel. Commonly in industry they use PLC to move all operations of Boiler system. This project is mainly concerned on boiler control system by using microcontroller PIC 16F877A. If the drum feed water level goes to too low, the drum itself can become overheated, possibly resulting in catastrophe. Feed water and drum level control has two modes of automatic operation: single- and three-element control. The drum level set point for both modes is set by the operator. In a single-element control the difference between the drum level and the drum level set point provides the error signal that is used by the single-element controller to control the rate of water entering the drum by modulating the feed water flow control valve. Three-element control governs the three variables that are used in this control scheme: drum level, steam flow, and feed water flow. Three-element control is much more stable and robust than single-element control. In this project the total Drum level, feed water and steam flow are controlled by single Microcontroller IC using hi-tech embedded technology