Fluid handling – Processes – With control of flow by a condition or characteristic of a...
Patent
1977-02-18
1978-05-30
Cohan, Alan
Fluid handling
Processes
With control of flow by a condition or characteristic of a...
137172, 210500R, B01D 1300
Patent
active
040918300
ABSTRACT:
A method and apparatus are disclosed for draining water from an oil storage tank. The apparatus includes a first, generally horizontal flow line communicating with both the bottom of the tank and a second generally vertical flow line. A housing structure is connected to the top of the second flow line for housing an oil imbiber material which passes water but which expands upon being contacted by oil to block further liquid flow. The housing structure includes an inlet at its bottom receiving the second flow line, an internal chamber receiving the imbiber material, a removal cap at its top to facilitate replacement of the imbiber material, and a discharge outlet through a side wall at a position above the inlet. In the method, water flows from the storage tank, through the first and second flow lines, into the housing structure, through the imbiber material and out of the housing structure. When essentially all of the water is removed from the oil tank, oil flows through the same path until the imbiber material expands to a sufficient extent to block further flow.
REFERENCES:
patent: 3502297 (1970-03-01), Wardrup
patent: 3750688 (1973-08-01), Hall
patent: 3958590 (1976-05-01), Hall
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