(Speaker40250)Heat Rate Improvement Demonstration using SBS Injection~(TM) and Ljungstrom~R Air Preheater

摘要

The Clean Power Plan recently issued by the U.S. Environmental Protection Agency (EPA) requires existing power plants to reduce carbon dioxide (CO2) emissions by roughly 32 percent from 2005 levels by the year 2030. The EPA has outlined three basic “building blocks” to achieve these reductions. These include: Improving the efficiency of existing fossil-fuel fired plants; Shifting to lower-emitting power sources such as natural gas combined cycle (NGCC);Installing more zero/low emitting power sources such as renewables and nuclear.The EPA has assumed that the efficiency of existing coal plants can be improved by an average of more than 4% from baseline levels. One way to accomplish this is to increase the recovery of energy from the combustion gases using the air preheater (APH) equipment installed on all coal power plants. However, to avoid fouling, pluggage, and corrosion of the equipment by SO3 present in the flue gas, it is often necessary to operate the APH at elevated gas exit temperatures, thereby reducing heat recovery and increasing both operating costs and CO_2 emissions.