摘要
流动体系油包水乳状液的微观特性是研究乳化体系流变特性、析蜡特性及水合物生成特性的关键问题。基于高压水合物浆液流动环道,借助在线高倍粒度分析仪,研究了不同试验条件(含水率、流动剪切速率、水浴温度、初始压力)对油包水乳状液微观特性的影响规律。结果表明:含水率越小、剪切速率越大、温度越高、压力越低,油包水乳状液液滴粒径越小,分散越均匀,稳定性越好。综合温度、压力、流速、含水率、密度、黏度、表面张力、导热系数等参数对液滴粒径及分布规律的影响,建立了3种尺度范畴下油包水乳状液液滴平均尺寸及其分布比例的预测关系式,与试验数据对比验证可得,预测式的精度在±5%以内。研究结果可为深入开展流动体系水合物生成的动力学机理分析与模型预测,提供技术支持与重要依据。
The microscopic characteristics of water-in-oil emulsion in a flow system play a key role in investigating its rheological property, wax precipitation characteristic and formation performance of hydrates. In this paper, based on a high-pressure hydrate slurry flow loop, the influence of water content, flow shear rate, temperature and pressure on the microscopic characteristics of water-in-oil emulsion droplets before the formation of hydrate were analyzed under different experimental conditions by using the online high-power particle size analyzer. It is indicated that water-in-oil emulsion droplets are smaller, more stable and dispersed more uniformly in the system with lower water content and pressure and higher flow shear rate and temperature. Then, the effects of temperature, pressure, flow rate, water content, density, viscosity, surface tension and thermal conductivity on the size and distribution of droplets were analyzed comprehensively, and a formula was established for predicting the average size and proportional distribution relationship of dispersed droplets in water-in-oil emulsion in three scales. And finally, prediction results were compared with the experimental data to verify the correctness of the formula. It is shown that the predication precision is within ±5%. It is expected to provide the technical support and important basis for the further dynamics mechanism analysis and model prediction on the formation of hydrate in flow systems based on hydrate shell model. （7 Figures, 3 Tables, 21 References）
出处
《油气储运》
CAS
北大核心
2018年第2期183-189,203,共8页
Oil & Gas Storage and Transportation
基金
国家自然科学基金资助项目"流动体系油包水乳状液微观特性对气体水合物生成传质传热影响机理研究"
51306208
国家自然科学基金资助项目"含蜡原油常温输送机理及流动改性方法研究"
51534007
国家重大科技专项资助项目"多气合采全开发周期集输及处理工艺"
2016ZX05066005-001
国家重大科技专项资助项目"海上管道降凝输送及流动管理技术研究"
2016ZX05028004-001
国家重点研发计划资助项目"基于深水功能舱的全智能新一代水下系统关键技术研究"
2016YFS0303704
中国石油大学(北京)科研基金资助项目"深水油气输运复杂流动传递与流固耦合"
C201602
关键词
油包水乳状液
微观特性
液滴尺寸
液滴分布
颗粒弦长分析仪
颗粒影像测试仪
water-in-oil emulsion, microscopic characteristics, droplet size, droplet distribution, Focused Beam Reflectance Measurement, Particle Vision ＆ Measurement
