Operating Limits of the Desanding Hydrocyclone for Produced Water Treatment

Abstract The desanding hydrocyclone, also termed a desander, is a cyclonic-based unit used to remove particulate solids from produced water. The application of a desander is the first step in produced water treatment, in which sand is removed before oil-in-water separation and disposal. With the smallest footprint and weight of any separation technology, combined with no moving parts, insensitivity to motion, and removal of particles down to 10 microns, a desander is perfectly suited for offshore facilities. Knowing the operating limits for the pressure drop, turndown, fluid properties, particle size handling, and solids concentration is fundamental for optimizing the operation of a desander. Guidelines are provided for process and mechanical requirements applicable to new or retrofitted systems.