 Boilers - Keeping the boiler or kiln functioning at peak efficiency reduces air emissions and the amount of fuel used for your processes.
1. Inspect boilers for scale deposits, accumulation of sediment on waterside surfaces. Remove deposits and sediment.
2. Pre-heat feed water with flue gas heat exchanger.
3. Inspect stacks to ensure visible emissions are below opacity limits. If not, it probably indicates that a burning adjustment is necessary.
4. Check boiler stack temperature. If it’s too high (more than 150 degrees F above steam or water temperature), clean tubes and adjust fuel burning.
5. Clean mineral/corrosion build-up on gas burners.
6. Check that burners are clean and operating at an optimum air-to-fuel ratio.
Local Efforts: The Rozell Heating Plant at Eastern Washington University upgraded and modernized the boilers that are used to provide heat and hot water to the campus. Nox emissions from the new boilers are 75% lower than expected emissions from the old boiler. The CO emissions are 56% lower. Resulting in NOx emissions reductions of 15 tons and CO emissions reductions of 9 tons.
Links: Energy Star, U.S. Dept. of Energy, EPA
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