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Comparison of laboratory analyses of CONAC coal standards

Technical Report ·
OSTI ID:6615254
The large variability in the composition of coal significantly impacts the performance of coal-fired plants and coal preparation facilities, their costs of operations, and their choice of methods for meeting emissions standards. For this reason, the electric utility industry recognizes the need for a rapid continuous analyzer of coal composition and quality. Therefore, EPRI and TVA initiated a project in 1979 to demonstrate a continuous online nuclear analyzer of coal (CONAC) and evaluate its performance. Development of the CONAC was performed by a contractor (Science Applications, Inc.), and manufacturer acceptance tests have been completed. The device is now undergoing testing at TVA's Paradise Coal Washing Plant. An important factor in the future success of the device is accurate calibration to the range of coals for which it will be used. The purpose of this study was to obtain a characterization of a wide range of coal standards for calibration reference values, while optimizing the calibration for TVA coals. The characterization of coals would result from a comprehensive laboratory analysis program on these coals and statistical analysis of laboratory results. Specific objectives included comparison of analytical results from four different laboratories, including analysis of laboratory means and variability; determination of the differences among coals used in the study; analysis of homogeneity of coal standards, and analysis of constituent relationships within the coal. Variability of results among and within laboratories was of particular interest, because the goal was to use the laboratory analysis data to derive suitable reference values for calibration of the CONAC. 7 references, 44 figures, 6 tables.
Research Organization:
Tennessee Valley Authority, Chattanooga (USA). Div. of Energy Demonstrations and Technology
OSTI ID:
6615254
Report Number(s):
TVA/OP/EDT-84/28; ON: DE84901968
Country of Publication:
United States
Language:
English

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