摘要
为优化螺旋管油水分离能力,对不同回转形状下螺旋管的分离效率进行研究。以水和油为混合介质,运用Euler-Euler多相流模型及PBM相群平衡方程对螺旋管内油水两相流动进行数值模拟。研究了圆形螺旋管在混合液入口流速为0.10~0.50 m/s范围内与在同一速度不同回转形状下管内油水分离效果及两相分布规律。对于圆形回转形状的螺旋管,在一定范围内,随着流速加快,其分层明显,油水分离效果增强,可当流速过快,分离时间减短,油水分离效果减弱,研究中的几何模型相对较佳的入口流速为0.30 m/s;在相同的流速及主要的几何参数情况下,三角、四边、五边回转形状的螺旋管,随着其边数的增加,回转碰撞聚结的概率提高,其油水分离效果提升,圆形回转形状相当于拥有无数条边数的多边形,所以分离效率最高,分离效果最好。研究结果可为螺旋管结构形状的优化设计提供参考。
To optimize the oil-water separation ability of spiral pipe,the separation efficiency of spiral pipe under different rotary shapes was studied. Using water and oil as mixing media,Euler-Euler multi-phase flow model and PBM group balance equation were used to simulate the oil-water two-phase flow in the spiral pipe. Given the inlet flow velocity of the liquid mixture of 0. 10 ~ 0. 50 m/s,the oil-water separation performance and the two phase distribution in circular spiral pipe under different rotary shapes have been studied. For circular rotary spiral pipe,within a certain range,with the flow velocity increase,the obvious layering was observed with enhanced oil-water separation. When the flow velocity was too fast and the separation time was shortened,the oil-water separation was weakened. Given the same flow velocity and the main geometric parameters,the spiral pipes with the triangular,quadrangular,pentagonal rotary shape have been analyzed. With the increase of the number of sides,the probability of cycle collision coalescence increased,resulting in enhanced oil-water separation. The circular rotary shape spiral pipe,which is equivalent to polygon with numerous sides,has the highest separation efficiency and the best separation performance. The results can provide references for the optimal design of spiral pipe.
出处
《石油机械》
北大核心
2018年第3期89-94,共6页
China Petroleum Machinery
基金
国家重点研发计划重点专项“公共安全风险防控与应急技术装备”之子课题“高温熔融金属作业事故预防与控制技术研究”(2017YFC0805101).
关键词
螺旋管
回转形状
油水两相流
分离效果
PBM模型
数值模拟
spiral pipe
rotary shape
oil-water two-phase flow
separation efficiency
PBM model
numerical simulation
