Capitalizing Upon Differences Between And Among PRB Coals

Tuesday, June 6, 2017
Time: 11 am EDT

Duration: 60 Minutes

The Powder River Basin coals are recognized as both Sub-bituminous C and Sub-bituminous A ranked fossil fuels. They differ with respect to many properties including not only calorific value and bulk chemistry (including ash chemistry) but also reactivity and the evolution of potential pollutants (e.g., fuel nitrogen, sulfur). Different PRB coals behave differently both individually and in blends with respect to the combustion process and the issues of deposition and corrosion. Using data from the USGS and case studies from end users, this webinar will explore these differences between and among the PRB coals, and comment on their implications for using such fuels in pulverized coal and cyclone boilers in optimal strategies. Using such fuels alone and in blends will be discussed.

What you will learn:
Most everyone knows the split between Wyoming and Montana with respect to sodium in the ash. Further the calorific values of the various PRB coals are well documented. What the viewers will learn is the reactivity of various PRB coals and what it means for NOx, for ignition, for blending with other coals and solid fuels (e.g., petroleum coke) and how it affects the performance of different types of boilers including both PC boilers and circulating fluidized bed boilers. The performance issues can then be translated into fuel selection and fuel management. Reactivity will be discussed in terms of proximate analysis, thermogravimetric analysis, and the kinetics of volatile evolution and char combustion. Where combustion takes place and the consequences of same are considered. When we were at Monroe we bought several PRB coals including both sub-bituminous A and sub-bituminous C coals. This case study will explore one plant’s comparisons with Sub-bituminous A and sub-bituminous C, development of a kinetics database so to optimize the performance of units (tweaking) by knowing the details of what we were burning. At times we could make full load and still have a heavy PRB blend by knowing the specifics of the PRB being burned.

Who should attend:
Individuals responsible for the technical aspects of fuel procurement and combustion optimization either at the corporate level or at the plant level. Managers of power plants are also encouraged to attend.

Hear from these experts:
Dave Tillman
Dave Tillman is an independent fuels and combustion consultant with over 40 years of experience. He retired as chief fuels and combustion engineer from Foster Wheeler in 2009, and has performed consulting services for electricity generating utilities and boiler suppliers since that time. He served as plant production specialist – fuels and Combustion for Monroe Power Plant of DTE Energy from 2003 to 2007. He returned to Monroe and DTE as a consultant in 2009. He is an author and editor of several books and papers concerning fuels and combustion, including the special issues associated with fuel blending.

Andrew S. Dobrzanski
Andrew S. Dobrzanski is a forty one year veteran of the public electric utility industry. Andrew’s last 10 years have been with DTE ENERGY/DTE Electric where he has held roles of: Supervisor of Engineering (Monroe Power Plant), Engineering Manager (River Rouge Power Plant) and his current role as Manager of Fuel Supply (Monroe Power Plant). Currently, Andrew was lead in bring a new fuel to the Monroe Power Plant....Petroleum Coke. Andrew was also an active team member on the PRB conversion team for the Bay Shore Power Plant. The Plant was successfully converted to burning PRB fuels in the mid -nineties. Andrew is a 1978 graduate of the University of Toledo, College of Engineering, with a degree in Mechanical Engineering Technology.
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