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Structural optimization for an axial oil‐water separator with multi‐stage separation
Heat and Mass Transfer ( IF 2.2 ) Pub Date : 2021-05-18 , DOI: 10.1007/s00231-021-03084-z
Le Zhao , Xiaobo Zeng , Weiguang Zhao , Fuqiang Zhu , Mingwen Hou , Guangming Fan

In order to meet the demand of industrial production, an axial separator for oil-water separation is proposed. The separator uses the pattern of multi-stage separation, and it is divided into two chambers by two swirl impellers. The oil phase flows out through three Light Phase Outlet (LPO) at the center of the impeller hub, meanwhile the water phase flows out through Heavy Phase Outlet (HPO). An experimental platform was built to verify the feasibility of multi-stage separation. The Mixture model and Reynolds stress model was used to simulate the separation process, and the numerical results had a well agreement with experimental results. The effects of the diameter of cylindrical section, length of conical section and length of separation chamber on the separation performance were studied. The results show that: changing the diameter of cylindrical section has greatest impact on separation performance. The separation efficiency and pressure drop first increase and then decrease with increase of primary conical section length. With increase of second conical section length, the separation performance has been increasing. If it only looks at the relationship between pressure drop and separation efficiency, then there is a pressure drop to maximize the separation efficiency. Changing the diameter of cylindrical section can adjust the flow split LPOs. Increasing the length of second conical section can increase the split ratio of LPO3, but it has almost no effect on the total split ratio of LPOs. the value of structure is determined and the efficiency of separator exceeds 93 %.



中文翻译:

多级分离轴向油水分离器的结构优化

为了满足工业生产的需求,提出了一种用于油水分离的轴向分离器。分离器采用多级分离模式,由两个涡流叶轮分为两个腔室。油相通过叶轮毂中心的三个轻相出口(LPO)流出,而水相则通过重相出口(HPO)流出。建立了实验平台以验证多级分离的可行性。用混合模型和雷诺应力模型模拟了分离过程,数值结果与实验结果吻合良好。研究了圆柱截面的直径,圆锥截面的长度和分离室的长度对分离性能的影响。结果表明:改变圆柱截面的直径对分离性能影响最大。分离效率和压降随着主要圆锥形截面长度的增加而先增加然后减少。随着第二圆锥形截面长度的增加,分离性能一直在提高。如果仅查看压降与分离效率之间的关系,则存在压降以使分离效率最大化。改变圆柱截面的直径可以调节分流LPO 如果仅查看压降与分离效率之间的关系,则存在压降以使分离效率最大化。改变圆柱截面的直径可以调节分流LPO 如果仅查看压降与分离效率之间的关系,则存在压降以使分离效率最大化。改变圆柱截面的直径可以调节分流LPOs。增加第二锥形部分的长度可以增加LPO的分流比3,但它有上LPO的总分流比几乎没有影响小号。确定了结构的值,并且分离器的效率超过93%。

更新日期:2021-05-18
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