Four-phase centrifuge is an upgraded high-performance decanter separator designed to handle complex multi-phase mixtures containing oil, water, fine solids and entrained gas in one continuous operation. Unlike conventional three-phase centrifuges that need extra degassing tanks and auxiliary separators to remove trapped gas, this four-phase centrifuge integrates gas venting structure inside the rotating bowl. Under powerful centrifugal force, materials stratify by density: heavy solids settle against the bowl wall, water forms the intermediate heavy liquid layer, oil gathers as the light liquid phase near the center, and free gas is discharged separately through the dedicated gas outlet.

    It is widely used in oilfield produced fluid treatment, slop oil recovery, offshore platform waste processing and refinery oily sludge disposal. The built-in gas removal function avoids gas accumulation inside the rotor, prevents unstable running, foam overflow and reduced separation efficiency that often trouble standard three-phase units. Key contact parts adopt wear-resistant hard-facing alloy and duplex stainless steel, suitable for abrasive, corrosive feed with sand, brine and volatile hydrocarbon gas. Equipped with PLC automatic control, VFD speed regulation and differential speed adjustment, operators can tune the liquid interface and gas backpressure to adapt to fluctuating feed composition and gas content.

    Continuous feeding and four-way independent discharge greatly simplify the whole separation process. It reduces auxiliary equipment footprint, cuts pipeline layout and lowers overall investment cost. Recovered oil can be sent back for refining; treated water meets reinjection or discharge standards; dewatered solid cake reduces landfill volume; separated gas can be safely collected or flared. Our four-phase centrifuge supports ATEX explosion-proof design for hazardous zone applications and provides full-cycle after-sales service. Contact our engineering team for process calculation and quotation for your oilfield separation project.