At CSU Drake Station With Targeted In-Furnace Injection™ Technology
Excerpt from technical paper presented at ASME Power 2010 – Chicago, IL
James Towell, Tom Martinez, David Hightower, Richard Maxey – Colorado Springs Utilities
Gerry Snow, PE; Hector Gonzalez; Robert Rians – Fuel Tech, Inc. Warrenville, IL
With TIFI installed on Units 6 and 7 at Martin Drake Station, the operators were able to blend Powder River Basin coal with design fuel up to double the percentages previously achievable. Using TIFI, the plant was able to maintain full load generation, better control slagging deposits, show improvements in heat absorption, and reduce attemperator spray flows over previous blend trials. Including the cost of the TIFI program, the station has demonstrated a potential annual operating cost reduction approaching $4.9 million. Effective return on TIFI program investment is 4:1.
The Martin Drake Power Plant comprises Units 5, 6, and 7. Units 5 and 6 are wall-fired boilers rated at 46 MW and 77 MW, respectively. Drake Unit 7 is a 1,336 MMBtu/hr (nameplate) Babcock & Wilcox wall-fired, dry bottom, coal-fueled boiler rated at 131 MW (net). Unit 7 entered commercial operation on June 14, 1974 and a reverse-air fabric filter baghouse was placed in service on Drake Unit 7 in November 1993. Low NOx burners were installed in October 1999.