| 摘要 |
<p>A method of using internal combustion engine (1) exhaust (, 2') in a combined cycle power plant is disclosed, wherein the quality and distribution of exhaust to the boiler space of a steam generated electric power plant is controlled to achieve greater system efficiencies, and wherein exhaust pollutants are reduced. Outside air is blended only with that portion of the exhaust (5) that passes through the burner ports as secondary or higher level combustion gas. The remainder of the exhaust is provided to the boiler space (3) by a route (7) other than through the burner. The highest overall system efficiencies are achieved where the amount of outside air blended with the portion of exhaust that passes through the burner is such that the blend contains about the minimum amount of oxygen required for complete and stable combustion of the selected fuel, where a substantial percentage of the total exhaust is routed to the boiler space by a route other than through the burner (20), and where the amount of fuel is sufficient to achieve a desired boiler entering temperature upon its combustion. Pollutants are reduced by combinations of staged reburning, Selective Non-Catalytic Reduction (SNCR), and Selective Catalytic Reduction (SCR) processes applied at various points along the combustion and exhaust path.</p> |
