Shipboard Oil-in-Water Content Monitor Based on Small Angle Forward Light Scattering.
GENERAL ELECTRIC CO PHILADELPHIA PA RE-ENTRY AND ENVIRONMENTAL SYSTEMS DIV
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A real time Shipboard Oil-In-Water Content Monitor using direct in situ measurements and electro-optical processing has been proven feasible. The concept uses spatial filtering of small angle forward scattering laser light allowing discrimination of oil particles only. The breadboard model used in this study has indicated that accuracies in the 0 to 100 ppm oil range on the order of plus or minus 10 or better can be expected for many oil types ranging from unrefined crudes to refined lubricating oils and hydraulic oil as well as mixtures of these oils. The interference of gas bubbles and solid particulates is eliminated for the most part by optically spatial filtering the diffraction pattern and centrifuging the sample stream. A test program involving studies of oil types, oil mixtures, oil concentrations, salinity, solids, air, mixtures of air and solids, and effects of detergent is described in this report along with graphical and tabular presentations of all data. Major problem areas disclosed by this study are described in detail and involve mostly sampling and sample handling techniques rather than detector-performance characteristics. Conclusions and recommendations are also included, indicating areas for continued study and development.
- Physical Chemistry
- Civil Engineering
- Test Facilities, Equipment and Methods