Integrated Dry NOx/SO2 Emissions Control System, A DOE Assessment

摘要

This document serves as a DOE post-project assessment (PPA) of a project selected in CCT Round III, the Integrated Dry NO x/SO2 Emissions Control Systems (IDECS), as described in a Report to Congress (U.S. Department of Energy 1991). The desire to reduce emissions of nitrogen oxides (NO, nitric oxide, and NO2, nitrogen dioxide, collectively referred to as NO x) and sulfur dioxide (SO2) by up to 70 percent at a minimum capital expenditure, while limiting waste production to dry solids that can be handled by conventional ash-removal equipment, prompted Public Service Company of Colorado (PSCC) to submit the proposal for the IDECS project. The project was sited at PSCC's Arapahoe Steam Electric Generating Station in Denver, Colorado. The purpose of this CCT project was to demonstrate the reduction of NO x and SO2 emissions by installing a combination of existing and emerging technologies were low-NO x burners (LNBS), overfire air (OFA), and selective noncatalytic reduction (SNCR) for NO x reduction; and dry sorbent injection (DSI), both with and without flue-gas humidification (FGH), for SO2 reduction. DOE provided 50 percent of the total project funding of $26.2 million.