Treatment of middlings stream from hot water process for recovering bitumen from tar sand专利检索-曝气池水处理专利检索查询-专利查询网

Treatment of middlings stream from hot water process for recovering bitumen from tar sand

阅读：104发布：2023-04-08

专利汇可以提供Treatment of middlings stream from hot water process for recovering bitumen from tar sand专利检索，专利查询，专利分析的服务。并且This process relates to treating the middlings stream from the primary separation cell used in the hot water process for extracting bitumen from tar sand. The middlings stream is diluted with hot water and settled in a quiescent zone. Froth is formed in the settler; this froth is surprisingly low in solids and water. The tailings stream from the settler is recycled to the front end of the extraction process, thereby conserving water. The invention provides an alternative to the conventional subaeration cell used for treatment of the middlings stream.，下面是Treatment of middlings stream from hot water process for recovering bitumen from tar sand专利的具体信息内容。

权利要求

1. IN A CONTINUOUS PROCESS FOR RECOVERING BITUMEN FROM TAR SAND COMPRISING COMBINING THE TAR SAND WITH AIR AND HOT WATER IN A TUMBLER TO DISINTERGRATE THE TAR SAND AND PRODUCE A HOT SLURRY, DILUTING THE SLURRY WITH WATER, INTRODUCING THE DILUTE SLURRY INTO A SEPARATION CELL WHEREIN COARSE SOLIDS SETTLE OUT TO FORM A TAILINGS PRODUCT, AERATED BITUMEN RISES TO THE SURFACE OF THE CELL CONTENTS AND FORMS A FROTH PRODUCT, AND A MIDDLINGS STREAM IS WITHDRAWN FROM THE CELL, SAID STREAM COMPRISING BITUMEN, FINE SOLIDS AND WATER, THE IMPROVEMENT WHICH COMPRISES: DILUTING THE MIDDLINGS STREAM WITH HOT WATER; AND INTRODUCING THE DILUTED MIDDLINGS STREAM INTO A SETTLER VESSEL AND HOLDING IT THEREIN FOR A SUFFICIENT PERIOD OF TIME TO ALLOW THE MAJOR PORTION OF THE BITUMEN IN THE STREAM TO RISE TO THE SURFACE OF THE VESSEL CONTENTS AND FORM A FROTH PRODUCT; WITHDRAWING THE FROTH PRODUCT; AND WITHDRAWING A TAILINGS STREAM FROM THE BASE OF THE VESSEL, SAID TAILINGS STREAM COMPRISING THE MAJOR PORTION OF THE FINE SOLIDS AND WATER INTRODUCED INTO THE VESSEL.

2. The process as set forth in claim 1 wherein: at least part of the tailings stream from the settler vessel is recycled for repeated treatment in the separation cell.

3. The process as set forth in claim 1 wherein: the middlings stream is aerated prior to entry into the settler vessel to facilitate bitumen flotation.

说明书全文

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Treatment of middlings stream from hot water process for recovering bitumen from tar sand

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