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We have a 80TPH Gas Fired Utility Boiler which has been commissioned recently. We have Main Steam Temp Control, 3 Element Boiler Drum Level Control, and Fuel Combustion Control. Under Normal Load (<75 TPH) all three control schemes are running smoothly without any issue. But in the peak load (>=79 TPH) controlability is becoming very poor, and we have to take the control valves to manual to save the systems from tripping.
Can anybody suggest the possible reason for such poor controlability in peak load.
Can anybody suggest the possible reason for such poor controlability in peak load.