Single, thief-sampling, calibration and control of separator apparatus and method
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United States of America Patent
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Oct 29, 2019
Grant Date -
Nov 24, 2016
app pub date -
Mar 23, 2016
filing date -
Apr 22, 2013
priority date (Note) -
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Abstract
A centrifugal, liquid-liquid separator is controlled, first by automatic control of back pressure to position of the dispersion band and equalize the settling lengths of both heavy and light phases. In line testing of a parameter reflecting the BS&W content of output oil controls withdrawal from a tank, and throughput rate through the separator. Output always meets a predetermined specification established on a daily basis by a market price and quality (contamination limit, maximum BS&W) for oil. Control provides assurance that all of a particular load in a tank will meet specification, and that it cannot change significantly before refining. Once the adjustment of the separator system reaches its lowest flow limit, processing halts, to assure that the oil quality is optimized. The controller may be used on any tank of separated oil to assure that no oil is withdrawn “out of spec.”
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