TNRU AND PROCESS WITH SCRUBBING OF ENTRAINED TAILINGS PARTICLES FROM AN OVERHEAD NAPHTHENIC SOLVENT STREAM

摘要

A tailings naphtha recovery unit (TNRU) for recovering naphtha from a diluted tailings includes a stripping vessel for separating the diluted tailings into a solvent component containing naphtha and entrained particles and a solvent recovered tailings component; a scrubbing vessel for scrubbing the solvent component to remove the entrained particles; and a heating device for heating a flushing fluid fed to the scrubbing vessel to or near the flash temperature of the solvent component. Entrained particle removal reduces damage and clogging in overhead systems in particular due to variations in TNRU feed. A tailings naphtha recovery process is also provided with an overhead scrubbing step to remove entrained particles from the flashed solvent.