Method for recycling deoiled water using counterflow falling-film evaporators
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United States of America Patent
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Sep 1, 2015
Grant Date -
Jun 14, 2012
app pub date -
Dec 12, 2011
filing date -
Dec 14, 2010
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Abstract
A method for treatment of produced water, particularly deoiled water, by evaporation. Methods use a vertical tube heat exchanger bundle where the brine is distributed in a falling film along the inside of the tube wall. Condensing steam causes a portion of the deoiled water to evaporate; this water vapor travels upward in a counterflow direction relative to the deoiled water. Evaporator sump volume is minimized, and evaporators may have a multi-piece construction to lower the center of gravity of an evaporator installation. This technology provides several advantages over conventional vertical tube co-current flow evaporators (where the vapor flows downward with the falling film). These advantages include a minimal total installed cost (TIC) and enhanced water chemistry management.
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