Preparing for New Multi-Pollutant Regulations with Multiple Low Capital Approaches

摘要

In preparation for the Cross States Air Pollution Rule (CSAPR) and the Mercury and Air Toxics Standard (MATS) regulation, Alliant Energy's Wisconsin Power and Light (WPL) contracted ADA Environmental Solutions (ADA) to perform a demonstation of low capital-cost pollution control technology. Full-scale testing was performed with dry sorbent injection (DSI) for SO_2 mitigation and activated carbon injection (ACI) with coal additives for vapor phase mercury control. For electrostatic precipitators (ESP) which rely on sulfur trioxide (SO_3) conditioning to maintain permitted particulate levels, injection of alkaline sorbents will likely remove a large fraction of the SO_3 being injected in the flue gas. Removal of SO_3 conditioning will affect ash resistivity and ultimately degrade particulate control. To maintain the ESPs permitted particulate performance, a proprietary SO_3 replacement chemical was tested in conjunction with DSI and ACI testing. This paper will present test results and control scenarios envisioned for compliance with the MATS regulation using a combination of multiple low capital-cost control technologies for acid gas and mercury reduction.