Conceptual Design of a Pulverized-Coal Test Facility for Evaluation of Coals for TVA Power Plants. Final Report

摘要

TVA operates 63 coal-fired boilers ranging in size from the four 60 MW units at Watts Bar to the two 1100 MW units at Cumberland. The individual TVA power plants are designed for coals ranging in ash content from 11.0% (Allen) to 21.0% (Paradise 1 and 2), and in sulfur content from 3.0% (Bull Run) to 5.0% (Paradise 1 and 2, and Widows Creek 8). Many of these plants are actually fired with a variety of coals from a large number of mines. The coals fired by TVA range from the high sulfur, low ash fusion temperature coals of Western Kentucky and Illinois to the low sulfur, high ash fusion temperature coals of West Virginia, Eastern Kentucky, and Eastern Tennessee. Improved means of evaluating specific coals to determine their suitability for use in specific boilers are needed. This report describes the conceptual design of a pulverized-coal laboratory for evaluating coals under a range of firing conditions to determine their slagging and fouling behavior, the ease of carbon burnout, emissions, and other items of interest. It is expected that coal samples can be evaluated by burning them under a range of standardized conditions, and that the slagging and fouling behavior exhibited in the laboratory furnace will be predictive of slagging and fouling behavior in a full-scale boiler. (ERA citation 07:045652)