Development and design of an advanced low-emission boiler system

The paper describes the work done in Phase I of the US Department of Energy (DOE) project `Engineering Development of Advanced Coal-Fired Low-Emissions Boiler Systems` (LEBS) which is part of the DOE`s Combustion 2000 Program. Work planned for future Phases is also described. The overall objective of the LEBS Project is to dramatically improve environmental performance of future coal-fired power plants without adversely impacting efficiency or the cost of electricity. Near-term technologies, i.e., advanced technologies that are partially developed, will be used to reduce NO{sub x} and SO{sub 2} emissions to one-third current NSPS limits and particulates to one-half current NSPS limits. The work in Phase 1 includes concept development and evaluation of several subsystems for controlling the emission of SO2, NOx, and particulates. Candidate technologies were then evaluated in various combinations as part of complete advanced supercritical power generation systems. One system was selected for preliminary design of a commercial generating unit. That design work is presently in progress.