| 摘要 |
Disclosed is a system for processing oil sands to remove bitumen, the viscous petroleum product adhered to the sands, from the sands itself. The processing system is designed to be substantially air tight, preventing outside air from entering and volatile chemicals from escaping from the system. Mined oil sands are delivered to the system, which creates a slurry of oil sands and solvent in a slurry chamber. The slurry is transported to a dissolution chamber which conditions the slurry before the slurry is sent to an extraction chamber. A plurality of trays and scrapers further conditions the slurry to remove bitumen. The use of heavy, aromatic solvents and light, paraff?nic solvents in sequence improves bitumen recovery while allowing environmentally safe processing of the sands to occur in a later step. The sands are dried and the solvent recovered for recycling and reuse in the system. Clean, dry sands are returned to the source of mined oil sands for reclamation. |
