HEAT RATE IMPROVEMENT
HEAT RATE IMPROVEMENT Optimizing Combustion. The boiler is often a good place to begin to look for heat rate improvements. The operating conditions controlled by adjusting fuel and air flow rates among burners adjusting mixing patterns of coal and combustion air and adjusting economizer O2 level. Changes to these parameters affect quantities such as combustion efficiency, steam temperatures, slagging and fouling patterns and Furnace heat absorption, which in many boilers have significant effects on unit heat rate. Soot blowing Optimization. Slagging and fouling deposits from coal ash accumulation on heat exchanger tubes affect boiler heat absorption patterns, steam temperatures and unit heat rate. Soot blowing optimization is used to identify soot blowing strategies which prevent uncontrolled buildup of slag and soot deposits and minimize heat rate. Soot blowing projects indicate potential heat rate improvements in the 0.25 to 1% range. Steam Temp