Manitowoc Public Utilities adding sorbent injection at Wisconsin unit

The Wisconsin Department of Natural Resources is taking comment until March 26 on a tentative approval for air permit changes that would allow Manitowoc Public Utilities an extra year, until April 2016, on the federal Mercury and Air Toxics Standards (MATS) compliance deadline, which will allow completion of a sorbent injection system on a solid-fuel boiler.

Manitowoc has asked to extend the MATS compliance date for the 58-MW (net) boiler B09 from April 16, 2015, to April 16, 2016, due to the installation of a sorbent injection system for this boiler. An approval letter was issued by the department on Jan. 30. This current permit revision is being used to incorporate the extended compliance date and the additional requirements in the approval letter into the plant’s permits. B09 fires primarily petroleum coke, with coal an allowed fuel (it burned 13% coal in 2013).

According to the Jan. 30 extension approval letter, Manitowoc needs to: complete sorbent injection trial studies July 31, 2015; issue purchase orders for the sorbent injection equipment by Oct. 1, 2015; begin installation of the sorbent injection equipment around Nov. 15, 2015; and complete the install of the sorbent injection equipment by Dec. 31, 2015, with startup and optimization of the sorbent injection system around Jan. 1, 2016. The unit would be allowed to fire the same petroleum coke, coal and biomass fuels as previously fired.

Manitowoc Public Utilities has an existing cogeneration facility located in Manitowoc County, Wisconsin. In addition to supplying electricity to the City of Manitowoc, the plant’s steam turbine generators provide steam to nearby customers for their heating and manufacturing needs. The facility operates two solid-fuel-fired circulating fluidized-bed boilers and one natural gas-fired package boiler. The other CFB, at 22-MW (net), that is not covered by this permitting is not subject to MATS due to its smaller size.

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.