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Overview of Crude Units. Crude units are the first units that process petroleum in any refinery. There objective is to. separate the mixture into several fractions like naphtha, kerosene, diesel and gas oil. A. schematic diagram of an atmospheric crude fractionation unit is shown in Figure 1-1. Crude. water.
These parameters are subsequently employed in a simple statisti-cal model to evaluate the reliability of the design of coal refuse impoundments. 1 INTRODUCTION Coarse coal refuse (CCR) is commonly used to con-struct dams to retain a slurry of fine coal refuse (FCR) and water. A site investigation, and in-situ and laboratory testing programs are customarily per-formed to determine the necessary material proper-ties for static and seismic design of the dam.