Abstract
Summary Produced water from polymer flooding (polymer-produced water) is difficult to treat by the conventional gravity settling process. A new type of double-cone air-sparged hydrocyclone (DcASH) has been designed, and its fundamental structure and operating principles are introduced in this paper. Experimental research on treating produced water from polymer flooding has been carried out, showing that the DcASH has a high treatment capacity. The oil concentration of treated water was less than 100 mg/L, which satisfied the requirements of the next deep-bed filtration process stage. Compared to gravity settling, conventional hydrocyclones, and flotation, the DcASH has a higher separation efficiency, which indicates that DcASH will have good application prospects in oilfield produced-water treatment.
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