Multi-Pollutant Removal System Performance -Based on Testing and Plant Operation Experience-

摘要

Building advanced pulverized-coal-fired power plants with the described multi-pollutant removal systems is the immediate power supply solution especially for coal-rich countries like the US and China. With this concept coal-fired power plants are not only reliable and cost effective but also highly efficient and extremely clean. In addition, present coal-fired power plants should be upgraded or replaced. If the present 50 % of US power would be supplied by such plants not only would the carbon dioxide CO_2 discharge reduced by 40 %, but more important the emissions would drop to:rnSO_2 < 0.04 lb /MWh or < 20 mg/ kWhrn(about 3 ppm ) NO_x < 0.1 lb/MWh or < 45 mg/kWhrn(about 10 ppm) Hg non-traceable (< 3ppb). PM_(2.5) non-traceablernMaking pulverized-coal-fired power plants environment friendly.rnWhen comparing this performance with other systems it is important to base such evaluation on the amount of emission discharge for the power generated in lb/MWh or mg/kWh. Comparing ppm or ppb is not a proper evaluation because different cycles discharge different amounts of flue gas per generated output. The Carnot cycle steam plants operates with little excess air and the remaining oxygen content of about 6%. Where as the Brayton cycle gas turbine plants uses much more air per generated MWh or kWh and the remaining oxygen in the flue gas is about 15%.