Method of produced water treatment, method of water reuse, and systems for these methods
AssigneesToyo Engineering Corporation, Sumitomo Electric Industries, Ltd.
InventorsHiroaki Ikebe, Hiroshi Yokohata, Masaaki Sakurai, Toru Morita
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Abstract
A method of produced water treatment in an in-situ recovery method of producing bitumen from oil sand, the method has the steps of: separating bitumen from bitumen-mixed fluid so as to leave produced water, the bitumen-mixed fluid having been recovered from the oil sand wells; and filtering the produced water via a microfiltration membrane made of polytetrafluoroethylene.
Claims15
A method of conducting water treatment of water produced from an in-situ recovery of bitumen from oil sand, comprising the steps of:
- subjecting a bitumen-mixed fluid to separation in a separator to obtain bitumen and a hot oil-containing water, the bitumen-mixed fluid being produced from an oil sand well;
- and
- filtering the hot oil-containing water at a temperature of from 85-135° C. with a microfiltration membrane made of polytetrafluoroethylene to produce a product water having a lowered oil content
- wherein the hot oil-containing water is filtered under an external or internal pressure with the microfiltration membrane having a hollow fiber structure, the microfiltration membrane has an outer diameter of 1-5 mm, an inner diameter of 0.5-4 mm, a porosity of 40-90% and continuous structures having a pore size of 0.01-0.45 μm and the microfiltration member is contained in a cross-flow filter system.
A system for conducting water treatment of water produced from an in-situ recovery of bitumen from oil sand, comprising:
- a separator for subjecting a bitumen-mixed fluid to separation comprising an inlet for receiving a bitumen-mixed fluid, an outlet for discharging bitumen, and an outlet for discharging an oil-containing water;
- and
- a microfiltration membrane contained in a cross-flow filter system and made of polytetrafluoroethylene, having a hollow fiber structure, an outer diameter of 1-5 mm, an inner diameter of 0.5-4 mm, a porosity of 40-90% and continuous structures having a pore size of 0.01-0.45 μm for filtering the hot oil-containing water at a temperature of from 85-135° C. under an external or internal pressure, the membrane comprising an inlet for receiving the oil-containing water and an outlet for discharging a product water having a lowered oil content.
Dependencies are inferred from the claim text.