HEAT AND WATER INTEGRATION PROCESS FOR AN OIL SAND OPERATION WITH DIRECT STEAM INJECTION OF WARM THICKENER OVERLFOW
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United States of America Patent
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Issued Date -
Mar 20, 2014
app pub date -
May 2, 2012
filing date -
May 20, 2011
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Abstract
A heat and water integration process for an oil sands operation includes subjecting warm oil sands tailings to thickening to produce thickened tailings and warm water overflow; subjecting the warm water overflow to direct steam injection (DSI) to produce steam heated thickener water; providing the steam heated thickener water to a unit of the oil sand operation; and producing the warm oil sands tailings from the oil sands operation. The oil sand operation unit may be an oil sand ore preparation unit and/or a primary separation unit, for example. The heated thickener water can replace water taken from pond inventories. The DSI may use excess, low quality, wet, low pressure and/or blow-down steam. The process enables improved heat and water usage in oil sands processing.
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