Development of a Centrifugal System for Separation of Oil and Solids from Shipboard Discharge Water.

摘要

Initial design and laboratory testing of an oil-solids-water separating system is described. The system is intended to process ships' bilge water at a rate of 50 gpm and provide water effluent containing less than 15 ppm of oil. The primary components of the final design are: (1) a cleanable bag strainer to retain coarse and fibrous solids, (2) a centrifugal pump that also separates setteable solids, (3) a coalescing centrifuge that separates well-dispersed oil, and (4) an oil-water monitor that continuously measures and records the oil-in-water concentration of the effluent. Results of component testing indicates that the overall system is capable of processing 50 gpm of bilge water containing concentration of up to 10 percent No. 2 fuel or lube oil and discharging water effluent with 15 ppm or less of oil. The following elements of this system design are described in detail: (1) the test evaluation of the Fram-Akers primary separator; (2) the development and testing of the FMA Solids-Oil-Separating Pump; (3) the evaluation of the laboratory model FMA Centrifugal Coalescer; (4) the development and testing of the FMA Shipboard Centrifugal Coalescer; and (5) the synthesis of the Shipboard Separator System.