环形异向流浅层流场油滴流动及分离特性研究
Flow and Separation Characteristics of Oil Droplets in Shallow Annular Counter-Flow Field
艾星宇 1邢宇涵 2蔡小垒 1陈家庆 1丁国栋 1安申法 3王秀军4
作者信息
- 1. 北京石油化工学院机械工程学院;深水油气管线关键技术与装备北京市重点实验室
- 2. 北京石油化工学院机械工程学院
- 3. 中石化胜利油田分公司石油工程技术研究院
- 4. 中海油研究总院有限责任公司
- 折叠
摘要
目前关于环形多层异向流浅层流道内液滴流动和油水分离特性的研究尚不够深入.为此,借助流体动力学方法,对环形异向流浅层流道内分散油滴运移分离特性和多层浅层流道速度分布特性进行分析.研究结果表明:环形异向流浅层流道内油滴浮升至斜板表面所需板长为 96 mm,小于理论计算所需板长122 mm;浅层通道内层间速度分布对分离效率影响较大,下层流道入口速度峰值为0.008 05 m/s,环形多层浅层通道内油相浮升过程中会遇到交叉流,显著影响浅层通道分离效率;滑移距离是影响浅层通道间分离效率的重要因素,当板长为350 mm、油滴粒径为50 μm时,滑移距离占板长38.35%.所得结论可为基于浅层沉降强化分离理论的紧凑型采出水处理设备结构创新优化设计提供理论支撑.
Abstract
The characteristics of oil droplet flow and separation in shallow annular multi-layer counter-flow channels have been inadequately investigated.In this paper,the flow and separation of dispersed oil droplets in shallow annular counter-flow channels and the velocity distribution in shallow multi-layer flow channel were ana-lyzed by using computational fluid dynamics(CFD)methods.The results indicate that the plate length required for the oil droplet floating upward in the shallow annular counter-flow channel to the surface of the inclined plate is 96 mm,less than the theoretical plate length(122 mm).The inter-layer velocity distribution in the shallow channel has a great impact on the separation efficiency,and the velocity at the inlet of the lower channel peaks at 0.008 05 m/s.The oil droplet may encounters a cross flow when it floats upward in the shallow annular multi-layer channel,which will impede greatly the separation efficiency in the channel.The sliding distance is a key factor influencing the separation efficiency.When the plate length is 350 mm and the grain size of oil droplet is 50 μm,the sliding distance accounts for 38.35%of the plate length.The research findings provide theoretical support for the innova-tive design and optimization of compact produced water treatment equipment based on the theory of shallow settling and enhanced separation.
关键词
采出水处理/环形异向流/浅层沉降分离/数值模拟/流道速度/分离效率/滑移距离Key words
annular counter-flow/shallow settling and separation/numerical simulation/velocity distribu-tion in flow channel/separation efficiency/sliding distance引用本文复制引用
基金项目
国家自然科学基金联合基金(U20B2030)
国家自然科学基金青年基金(51806019)
中国石化科研项目(320047)
北京市教委科技一般项目(KM202110017007)
北京石油化工学院大学生研究训练计划(2024J00095)
出版年
2024
NETL
NSTL
万方数据