AN IMPROVED CONTROL SYSTEM FOR COMBUSTION CONTROL OF A BOILER OR A STEAM GENERATOR

摘要

The invention relates to an improved control system for combustion control of aboiler of a steam generator, comprising an embedded controller (4) interfaced toan on line coal analyzer (3) and operably connected to a distributed controldevice (5) of a boiler, the system is configured to receive input signalsrepresenting contents of fixed carbon, Sulfur, Hydrogen, Nitrogen, and ashcontent in the coal from the on line coal analyzer (3); additional inputs relatingto boiler load demand, steam flow and oxygen level of the flue gas ateconomizer outlet from the control device (5); process the input data andprovide the output representing primary air demand, and secondary air demand;and implement an adjustment in the primary and the secondary airflow via asetting means capable of determining the amount of excess air to be useddepending on the data from the coal analyzer (3).