Wisconsin Public Service Corp. told the Public Service Commission of Wisconsin in a Feb. 6 quarterly update that the first of three phases of a new coal dust collection system at the Weston power plant is completed, with the other two phases due for operation this year.
The commission had approved the $17m project in November 2013. Balance of plant (BOP) construction and installation of Phase I, which is crusher house and silo fill dust collectors, have been completed. These dust collectors were placed in-service in October 2014. Additional work on the silo fill receiver will take place in the first quarter of 2015.
Phase II and III engineering work is in final review. Equipment fabrication continues off site and the BOP construction is expected to start in April 2015. Delivery and Installation of the reclaim, junction and dumper house dust collectors is expected to start in the second quarter of 2015 and continue throughout the year. Work will continue through 2015 on these dust collectors as planned. Phase 2 is scheduled to be in-service by June 20, and Phase 3 is scheduled to be in-service by Dec. 31.
Weston, located near Wausau in central Wisconsin, is home to four coal units. Weston 4, the newest unit, is a 595-MW facility that began operation in 2008. WPS owns 70% (416.5 MW) and Dairyland Power Cooperative owns 30% (178.5 MW) of Unit 4. Weston Unit 3 (351 MW) began operating in 1981, Unit 2 (82 MW) in 1960 and Unit 1 (60 MW) in 1954. On Unit 3, WPS is currently installing the ReACT (Regenerative Activated Coke Technology) system, which will significantly reduce SO2, NOx, mercury and other emissions, and is due for operation in 2016.