The Colorado Pollution Control Division went out for public comment on June 17 on regional haze Best Available Retrofit Technology (BART) compliance plans for the the coal-fired Martin Drake Units 5-7 and Ray Nixon Unit 1 of Colorado Springs Utilities.
These units, the only coal units for Colorado Springs, need to comply by Jan. 30, 2018, on varying schedules depending on units and pollutants involved. The compliance plans by pollutant are:
- Particulate matter (PM) – use of existing baghouses on all four units.
- NOx – Replacement of existing Low-Nox Burners (LNBs) with Ultra Low-NOx Burners and Overfire Air (OFA) systems on all four units. The division noted that in January of this year, Babcock and Wilcox Power Generation Group got the contract for this work. The plan is to comply with the NOx program in 2014 at Drake Units 6-7, and 2015 at Drake Unit 5 and Nixon Unit 1.
- SO2 – Installation of lime spray dryers or equivalent on Drake Units 6-7 and Nixon Unit 1. Installation of dry sorbent injection (DSI) or equivalent on Drake Unit 5. The division noted that Colorado Springs has contracted with local company Neumann Systems Group to provide an innovative dual-alkali flue gas desulfurization system for Drake Units 6-7, with an eye on that technology being applied to Nixon Unit 1 if successful. The target is for Drake Unit 5-7 compliance in 2016, followed in 2017 by compliance at Nixon Unit 1.