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oil sands extraction process diagram

In-situ extraction methods are used to recover bitumen that lies too deep beneath the surface for mining (greater than 75 metres underground). Improve the recovery yield of bitumen and saleable synthetic crude oil above the present level. Dry tailings are also produced which can be disposed of in a manner which permits reconservation of the mined out area and which eliminates environmental pollution impact on surrounding water bodies and land bodies. Privacy Policy You consent to our cookies if you continue to use our website. E.g. The invention will now be described with reference to the accompanying drawing in which a block diagram of the process is shown. Privacy Policy Suncor’s Upgrading operations process bitumen into higher-value synthetic crude oil and diesel fuel using two upgraders at its oil sands site in Fort McMurray. This invention acts as a safeguard back-up system to recover approximately 99% by weight of such high commercial bitumen losses whether continuous or discontinuous. The hot water and oil sands are mixed and then transported as a pulp to a primary separation unit 2 where the major separation of oil in the form of froth, consisting of recoverable bitumen, water and mineral matter, and solid tailings occurs. Essentially most of the hot water is recovered from the tailings streams of the hot water extraction plant and is recycled within the process thus increasing the thermodynamic efficiency of the process. As wet tailings are not being disposed of, the need for dams or dykes is not required and land reclamation problems and operational problems involved with the present wet tailings systems are eliminated thus making additional land available for mining. There is thus a considerable saving in energy required to operate the process. 2. The purpose of upgrading is to transform bitumen into synthetic crude oil (SCO) which can be refined and marketed as consumer products such as diesel and gasoline. & Terms of Use. Large shovels scoop the oil sand into trucks which then move it to crushers where the large clumps of earth are processed. Suncor also operates upgrading assets at its Edmonton refinery. You will not receive a reply. Secondary upgrading is meant to further purify and distill the bitumen obtained from primary upgrading to remove unnecessary impurities such as nitrogen, sulphur, and trace metals so that it could be used as feedstock for oil refineries. A vacuum filter unit which is satisfactory for this purpose has an number of radially disposed filtration segments which provide for a continuous operation. a. passing first wet tailings from the primary separating unit into a vacuum filter segment having a filter medium; b. elutriating the first wet tailings in the filter segment with hot water; c. decanting a portion of solid free liquid from the main body in the filter segment above the filter medium, and returning the decanted portion to the primary separating unit; d. vacuum filtering the main body of first wet tailings through the filter medium to recover bitument and hot water and form a tailings filter cake above the filter medium; e. passing second wet tailings from the secondary separation unit and froth clean-up unit onto the filter cake; f. elutriating the second wet tailings in the filter segment with hot water; g. decanting a portion of solid free liquid from the main body of second wet tailings in the filter segment above the filter cake and returning the decanted portion to the primary separating unit; h. vacuum filtering the main body of second wet tailings through the filter cake and the filter medium to recover bitumen, hot water and diluent; i. passing hot solvent diluent through the filter cake to extract bitumen from the cake; j. passing hot water through the filter cake to recover more bitumen and diluent which was retained therein in step i; k. subjecting the filter cake to vacuum to reduce its moisture content; l. rotating the filter segment and discharging the filter cake for transportation of conventional materials handling equipment to a waste dumping site; and.

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