New technology in oil-content monitors

Technical Report · Thu Jan 01 04:00:00 EST 1987

OSTI ID:5921584

Nardella, J A; Raw, T T; Stokes, G H

With legislation of international antipollution requirements to regulate the oil content of bilge effluent from ships, the U.S. Navy is installing pollution abatement equipment on all vessels. The equipment will consist of an oil/water separator in the bilge dfischarge line, followed by an oil content monitor which makes the final decision on whether or not the water is clean enough to be pumped overboard. The monitor is required to make a real time measurement of oil concentration in the range 15 + or - 5 to 100 + or - 20 ppm for flow rates up to 50 gal/min. and possibly in the presence of interfering contaminants, such as rust. This paper presents results of the current effort to develop a monitor which satisfies all these requirements and is sufficiently rugged for fleet deployment. The monitor employs two fiber optic systems and a small microprocessor. The first optical system measures the concentration of particles in the flow as function of their sizes, using small angle forward scattering. The second determines what percentage of the particles in the flow are oil, using large-angle scattering. The microprocessor takes these data and calculates the oil concentration in the flow.

• Research Organization: Association of Scientists and Engineers of the Naval Sea Systems Command, Washington, DC (USA)
• OSTI ID: 5921584
• Report Number(s): AD-A-183941/4/XAB
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020900* -- Petroleum-- Environmental Aspects
520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
COMPUTERS
ELECTRONIC CIRCUITS
EQUIPMENT
FIBER OPTICS
FLOW RATE
HYDROGEN COMPOUNDS
LEGISLATION
MEASURING INSTRUMENTS
MICROELECTRONIC CIRCUITS
MICROPROCESSORS
MONITORING
MONITORS
OILS
OPTICAL EQUIPMENT
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PARTICLES
POLLUTION ABATEMENT
SEPARATION EQUIPMENT
SHIPS
WATER
WATER POLLUTION ABATEMENT
WATER POLLUTION MONITORS