Method of recovering solvent from tailings by flashing under choked flow conditions
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United States of America Patent
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Mar 12, 2019
Grant Date -
Feb 20, 2014
app pub date -
Apr 4, 2012
filing date -
Apr 28, 2011
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Abstract
A tailings solvent recovery unit (TSRU) recovers a solvent from a solvent diluted tailings and includes a separation apparatus which has a flash vessel, tailings outlet, solvent outlet and an inlet spray system for supplying the diluted tailings to the flash vessel. The spray nozzle system may include multiple nozzles arranged around the periphery of the flash vessel for flash-atomization over its cross-section of the flashing chamber, a nozzle sized and configured to provide choked flow of the diluted tailings, multiple nozzles each being operable in an on/off mode to regulate a total feed flow, or multiple nozzles associated with a distributor and multiple feed conduits.
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