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Show state-of-the-art. However, this work can serve as a basis for slurry optimization and quality control for both the slurry vendors and potential slurry users. The results of the program will be published by EPRI in two volumes. Volume I will contain the recommended CWS test procedures; Volume II will contain results of the fuel characterization, rheology, atomization, and combustion tests, the correlations developed, and the guideline CWS specifications. EXPERIMENTAL PROGRAM Fuel Characterization The fuel analysis procedures listed in Table 1 were used to characterize the parent coals and CWSs. These tests provide a basis for comparing different CWSs, for assessing the effects of coal properties and CWS properties, and aid in interpreting handling and combustion test results. The laboratory ashing furnace (LAF), shown schematically in Figure 1, was used to study factors pertaining to ash deposit formation in boiler tube banks. Properties of fly ash produced in this unit are comparable to those obtained from commercial installations when similar combustion conditions are maintained. The LAF is designed to fire liquid, solid, slurry, and gaseous fuels and has an optimal heat input of 200,000 Btu/hr. The LAF consists of pulverized coal and liquid/slurry feed systems, an appropriate burner for specific fuel type, a refractory combustion chamber with a three-zone electric guard heater, a water-cooled heat exchanger, and a fly ash collection system. The CWS feed system includes a heated 55-gallon storage tank with an air-powered mixer, a progressing-cavity pump with variable-speed drive, feed lines, and a water-cooled burner with internal-mix atomizers. |