Clarification of produced water in the oil and gas industry

Details Clarification of produced water in the oil and gas industry Clarification of produced water in the oil and gas industry

1994-10-11

1996-08-06

Lithgow, Thomas M.

Liquid purification or separation

With means to add treating material

Directly applied to separator

210109, 210320, 210322, B01D 17035

Patent

active

055430430

ABSTRACT:
Apparatus for clarifying produced water. A flotation chamber has a produced water inlet, a clean water outlet, and is segmented into a plurality of cells by baffles. An oil overflow compartment is in fluid communication with the upper portion of the chamber. Produced gas is introduced into each cell of the flotation chamber by porous sparger tubes creating bubbles of 100 to 1000 microns in diameter. The bubbles rise through the water removing any suspended oil particles. The gas exits through a gas outlet. The removed oil collects on the liquid surface of the produced water and overflows to the overflow compartment. Oil is removed from the overflow compartment via an oil outlet.

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Gutkowski et al, "Flotation of Oil Droplets From Water" Engr. Found. Conference, Fraklin Pierce College, NH Aug. 2-7, 1981.
Reay et al, "Removal of Fine Particles from Water by Dispersed Air Flotation: etc", Canadian Journal of ChE, vol. 51, Apr. 1973.
Warnstedt, "Untersuchungen zur Entolung erdolhalfiger Salzwasser durch feinslasige Begasung", vol. 88, 1972 Erdoel-Erdgas.
Strickland, "Laboratory Results of Cleaning Produced Water by Gas Flotation", Society of Petroleum Engr., Jun. 1980.

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