Interstate Power and Light pursues delayed FGD for Lansing Unit 4

Interstate Power and Light (IPL) has had trouble getting a final air permit for a scrubber project on its coal-fired Lansing Unit 4, but hopes to have the problem cleared up soon and the project in construction.

IPL, a unit of Alliant Energy (NYSE: LNT), on Oct. 1 filed with the Iowa Utilities Board an annual update to its Emission Plan and Budget (EPB).

IPL received the Air Quality Prevention of Significant Deterioration (PSD) Construction Permit from the Iowa Department of Natural Resources (IDNR) for the Lansing Unit 4 scrubber project on May 13. In June, IPL appealed certain provisions of the permit. IPL and the IDNR have engaged in informal negotiations, and IPL believes it has resolved issues with the IDNR identified with the appealed provisions. IDNR will issue a revised permit following a notice and comment period.

In June, IPL selected Burns & McDonnell Engineering to do engineering, procurement and construction of the Lansing Unit 4 Circulating Fluid Bed (CFB) scrubber. Babcock & Wilcox Power Generation Group was selected as the scrubber equipment supplier. Detailed engineering and procurement activities have commenced and are on schedule. Construction activities are scheduled to begin in the second quarter of of 2014 and the project is currently expected to go into service in the spring of 2015.

New NOx and mercury controls on Lansing Unit 4 were installed a few years ago and those projects are considered operationally complete. The GenerationHub database has Lansing Unit 4 with 237 MW (net summer) of capacity.

At the coal-fired Ottumwa Unit 1, IPL received a PSD Construction Permit from the IDNR in January 2012 for construction of new Air Quality Control Systems (AQCS). This includes an activated carbon injection (ACI) system and pulse jet fabric filter (PJFF) baghouse that will reduce mercury emissions. IPL engaged Burns & McDonnell to complete preliminary engineering, estimating, scheduling, and evaluation of bids. IPL has contracted with BWM Ottumwa Environmental Partners, a joint venture of Burns & McDonnell and Babcock & Wilcox Construction Co., for the engineering, procurement, and construction of the ACI system and baghouse. Detailed engineering, fabrication and construction of the ACI system and PJFF baghouse began in 2012 and continued in 2013. Fabrication and construction of the ACI system and PJFF baghouse will continue until November 2014. Start-up and commissioning will begin following the tie-in outage completion in November 2014.

Also at Ottumwa Unit 1, IPL received a PSD Construction Permit from the IDNR in January 2012 for a new AQCS that includes a spray dryer absorber (SDA) flue gas desulfurization system to reduce SO2 emissions. IPL engaged Burns & McDonnell to complete preliminary engineering, estimating, scheduling and evaluation of bids for the SDA. IPL has contracted with BWM Ottumwa Environmental Partners for construction of the SDA scrubber. Detailed engineering, fabrication and construction of the SDA scrubber began in 2012. Fabrication and construction of the SDA will continue until November 2014. Start-up and commissioning will begin following the tie-in outage completion in November 2014.

The GenerationHub database has Ottumwa Unit 1 at 696 MW (net summer) of capacity.

Future projects, by coal unit (with MW ratings from the GenerationHub database), with some of the details redacted from the public version of this filing, are:

Burlington Unit 1 (198 MW net summer)

  • Mercury control – ACI projects are planned as a result of the preliminary work and testing associated with complying with federal Mercury and Air Toxics Standards (MATS). Additional engineering, analysis and scoping on the project is underway in 2013 with a target installation date of 2014.
  • Particulate control – Based on engineering and analysis completed in 2012, IPL determined that sectionalization of the electrostatic precipitator is the most effective option for compliance with the particulate matter (PM) requirements of the Utility MATS. Planning and staging for this work is ongoing, with a target construction start date in October 2013.

Prairie Creek Unit 3 (36 MW net summer)

  • Mercury control – ACI projects are planned as a result of the preliminary work and testing associated with complying with MATS. Additional engineering, analysis and scoping on the project is underway in 2013 with a target installation date of 2014.
  • Particulate control – Based on engineering and analysis completed in 2012, IPL determined that sectionalization of the electrostatic precipitator is the most effective option for compliance with the PM requirements of MATS. This work was completed in September 2013. A PM continuous emissions monitor system (CEMS) has been installed.

Prairie Creek Unit 4 (128 MW net summer)

  • Mercury control – ACI projects are planned as a result of the preliminary work and testing associated with complying with MATS. Additional engineering, analysis and scoping on the project is underway in 2013 with a target installation date of 2014.
  • Particulate control – Based on engineering and analysis completed in 2012, IPL determined that sectionalization of the electrostatic precipitator is the most effective option for compliance with the PM requirements of Utility MATS. This project was initiated in September 2013 and will be completed in the fourth quarter of 2013.

M.L. Kapp Coal Unit (211 MW net summer)

  • Testing has been performed to evaluate the unit’s capabilities and performance on natural gas as a MATS compliance option.

IPL is dismantling the turbines at Sutherland Generating Station Unit 2 (38 MW net summer) and Prairie Creek Generating Station Unit 2 (18 MW net summer). IPL plans to continue evaluating closure plans for the Sixth Street Generating Station, focusing on the development of a coal ash pond closure plan. More planning may occur at other IPL facilities during the 2013-2017 time period if all units at a location will be retired.

About Barry Cassell 20414 Articles
Barry Cassell is Chief Analyst for GenerationHub covering coal and emission controls issues, projects and policy. He has covered the coal and power generation industry for more than 24 years, beginning in November 2011 at GenerationHub and prior to that as editor of SNL Energy’s Coal Report. He was formerly with Coal Outlook for 15 years as the publication’s editor and contributing writer, and prior to that he was editor of Coal & Synfuels Technology and associate editor of The Energy Report. He has a bachelor’s degree from Central Michigan University.