This paper addresses the escalating challenge of oil–water separation by proposing a novel concept of partitioned and graded cyclone separation. The primary objective is to mitigate the issue of inefficient heating energy consumption in fluids produced with a high water cut, thereby meeting the demands for a low-carbon and energy-saving process. The paper introduces the concepts of split chamber swirl and targeted separation, and designs cascade dewatering equipment to achieve compact and efficient cascade enhanced dewatering performance. The separation performance of the equipment was analyzed through the combination of experiment and numerical simulation. The results reveal that the centrifugal acceleration of the main swirl chamber is 250 times that of gravity, and the centrifugal acceleration of each subsidiary swirl chamber is 5200 times that of gravity. Large oil droplets are separated in the main chamber, while small oil droplets are separated in the subsidiary swirl chamber, realizing efficient oil–water separation. Compared to single-stage dewatering equipment, the dewatering rate of the cascade dewatering equipment increases by approximately 20 %. When the inlet flow rate is controlled at 1.0 m3/h–1.3 m3/h and the inlet water cut ranges from 70 % to 85 %, the dewatering rate exceeds 70 %, meeting the technical indicators for an oil outlet water cut less than 50 %. Furthermore, by controlling the split ratio within 43 %, the recovery rate of oil can exceed 80 %. It is noteworthy that the cascade dewatering equipment offers a novel solution to the problem of fluids produced with a high water cut.

中文翻译：

---

复叠式脱水设备的分离性能和离心特性


本文通过提出一种分流和分级旋流分离的新概念，解决了油水分离日益严峻的挑战。主要目标是缓解高含水率产生的流体中加热能耗低下的问题，从而满足低碳和节能工艺的要求。本文介绍了分体室涡流和靶向分离的概念，并设计了复叠脱水设备，以实现紧凑高效的复叠增强脱水性能。通过实验和数值模拟相结合的方式分析了设备的分离性能。结果表明：主旋流室的离心加速度是重力的 250 倍，每个子涡流室的离心加速度是重力的 5200 倍。大油滴在主室中分离，而小油滴在副涡流室中分离，实现高效的油水分离。与单级脱水设备相比，复叠式脱水设备的脱水率提高了约 20%。当进水流量控制在 1.0 m3/h–1.3 m3/h 且进水含水率范围为 70 % 至 85 % 时，脱水率超过 70 %，满足出油含水率低于 50 % 的技术指标。此外，通过将分流比控制在 43 % 以内，油的回收率可以超过 80 %。值得注意的是，复叠式脱水设备为高含水率产生的流体问题提供了一种新颖的解决方案。