Alkali deposits found in biomass boilers: The behavior of inorganic material in biomass-fired power boilers - Field and laboratory experiences
This report documents the major findings of the Alkali Deposits Investigation. This investigation was a collaborative effort to understand the causes of unmanageable ash deposits in biomass-fired electric power boilers. A group of interested industrial institutions and the US DOE Energy Efficiency and Renewable Energy Office's Biomass Power Program through the National Renewable Energy Laboratory jointly sponsored the project. The industries contributed both funding and, in many cases, use of facilities to the project and included Mendota Biomass Power Ltd. and Woodland Biomass Power Ltd. (both associated with Thermo Electron Energy Systems), CMS Generation Operating Co. (formerly Hydra-Co Operations Inc .), Wheelabrator, Shasta, and Hudson Energy Cos., Sithe Energy Co., Delano Energy Co. Inc., the Electric Power Research Institute, Foster Wheeler Development Corp., and Elkraft Power Co. Ltd. of Denmark. Research contracts with Thomas R. Miles Consulting Design Engineers, Sandia National Laboratories, and The National Renewable Energy Laboratories provided the government portion of the funding. In addition, the University of California at Davis and the Bureau of Mines performed significant work in close collaboration with the other researchers. Volume I of this report provides an overview of the project, with selected highlights. This volume provides more detail and discussion of the data and implications.
This document includes six sections. The first, the introduction, provides the motivation, context, and focus for the investigation. The remaining sections discuss fuel properties, bench-scale combustion tests, a framework for considering ash deposition processes, pilot-scale tests of biomass fuels, and field tests in commercially operating biomass power generation stations.