Chemical oxidation or electromagnetic treatment in SAGD operations
First Claim
1. A process for treating produced water comprising steps of, degrading organics in the produced water by way of chemical oxidation;
- passing the produced water with degraded organics through a steam generator;
separating a liquid blowdown from an output from the steam generator; and
treating the liquid blowdown in a crystallizer, wherein the chemical oxidation is applied to the liquid blowdown upstream of the crystallizer.
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Accused Products
Abstract
A system for treating produced water, for example from a SAGD bitumen production operation, has a treatment unit using chemical oxidation (CO) or electromagnetic treatment (ET) to destroy or degrade organics in the produced water. The treatment module may use CO or ET in combination with biological treatment or sorption processes or both. When the treatment module is used upstream of a steam generator, it reduces fouling in the steam generator and in any blowdown water treatment device. A brine concentrator or a crystallizer may be used to treat the blowdown water. The treatment module may be used in combination with a nanofiltration (NF) or reverse osmosis (RO) membrane filter. Optionally, the produced water may be treated with an ET process such as microwaves directly upstream of a steam generator or upstream of a concentrator or crystallizer in a blowdown water stream.
20 Citations
13 Claims
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1. A process for treating produced water comprising steps of, degrading organics in the produced water by way of chemical oxidation;
- passing the produced water with degraded organics through a steam generator;
separating a liquid blowdown from an output from the steam generator; and
treating the liquid blowdown in a crystallizer, wherein the chemical oxidation is applied to the liquid blowdown upstream of the crystallizer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- passing the produced water with degraded organics through a steam generator;
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10. A system for treating produced water from a steam assisted gravity drainage production well to produce steam for injection into ground above the production well comprising:
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a) a steam generator; b) a crystallizer connected to receive blowdown water from the steam generator; and
,c) a chemical oxidation module located so as to intercept the blowdown water upstream of the crystallizer. - View Dependent Claims (11)
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12. A system for treating produced water from a steam assisted gravity drainage production well to produce steam for injection into ground above the production well comprising:
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a) a steam generator; b) a chemical oxidation module located so as to intercept blowdown water flowing from the steam generator to a crystallizer; and
,c) a reverse osmosis membrane filter downstream of the chemical oxidation module. - View Dependent Claims (13)
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Specification