Oil/water separation process

Details Oil/water separation process Oil/water separation process

B - Operations, Transporting

01

D

B01D 17/04 (2006.01) B01D 17/02 (2006.01) B01D 17/025 (2006.01) B01D 19/00 (2006.01)

Patent

CA 2108297

ABSTRACT OF THE DISCLOSURE The separation of oil from water is usually an expensive proposition, necessitating the use of complicated and expensive treaters and/or large water handling vessels such as free water knockouts, filtration systems and atmospheric settling tanks. A relatively simple apparatus which solves the problems of existing systems includes an elongated horizontal casing divided by a transversely extending partition into an inlet, heating chamber and a coalescing chamber, a pair of elongated, tubular heaters extending into the heating chamber for heating the oil and water in such chamber to facilitate separation of the oil and the water, an inlet trough at the inlet end of the casing with a downcomer tube attached thereto for introducing an oil water emulsion into the casing, whereby a water stream is established at the bottom of the casing with an oil stream thereabove in the heating chamber and a gas stream at the top of the casing, a weir attached to the partition for receiving oil separating from the water in the heating chamber, distributors extending from the bottom of the partition into the coalescing chamber for receiving oil overflowing the weir and distributing the oil in the coalescing chamber near the bottom thereof, an elongated, horizontal coalescing bed completely spanning the coalescing chamber, whereby the entire oil stream passes through the bed, the bed being completely filled with spheres for promoting separation of residual water from the oil stream, a water outlet at the outlet end of the casing remote from the inlet end, an oil outlet in such outlet end, and a gas outlet in the top of the casing proximate the outlet end. The water stream discharged from the coalescing chamber is fed firectly to a hydrocyclone for the separation of residual oil from the water stream.

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