Babcock & Wilcox Power Generation Group, Inc.

The Babcock & Wilcox Company

Edward J Campobenedetto

Bryan J Jankura

Anthony A Silva

Herbert Schuster

Stephen A Johnson

Methods of reducing emissions levels during steady-state conditions are disclosed for use with a dry scrubber desulfurization system. A dry calcium hydroxide powder is injected into the gas flowpath and watered in the spray dryer absorber. The resulting slurry is then deposited on the filter bags in the baghouse. This can be done at lower temperatures than the spray dryer absorber would otherwise be operable, enabling desulfurization to occur earlier in the combustion process, particularly during startup of a cold boiler at ambient temperature. The operation of the boiler can also be backed up, made up, trimmed, or augmented depending on various operating scenarios.

Dry sorbent injection during steady-state conditions in dry scrubber

Methods of reducing emissions levels during upset periods such as startup are disclosed for use with a dry scrubber desulfurization system. A dry calcium hydroxide powder is injected into the gas flowpath and hydrated in the spray dryer absorber. The resulting hydrated powder is then deposited on the filter bags in the baghouse. This can be done at lower temperatures than the spray dryer absorber would otherwise be operable, enabling desulfurization to occur earlier in the combustion process, such as during startup of a cold combustion system at ambient temperature. The operation of the combustion system can also be backed up, made up, trimmed, or augmented depending on various operating scenarios.

Dry sorbent injection during non-steady state conditions in dry scrubber

An improved multi-fuel burning method and apparatus having means for regulating the fuel-air mixture passing therethrough and including four separately controlled passageways delivering the air necessary for combustion and transport of the fuel while reducing the formation of nitrogen oxides.

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Medina, OH, United States of America

Edward J Campobenedetto