水合物浆液流动特性研究

采用水合物循环管路装置,添加比例为水量2%(质量比)的防聚剂Span80,在压力为1.6MPa、温度为280.2K的条件下,测定了(柴油 甲烷 四氢呋喃 水)体系在不同水油体积比时生成水合物浆液的流体力学行为。将(水合物 液体)的非均相体系当作拟流体处理,建立了水合物浆液的流动模型,计算了各实验体系的表观粘度,分析了不同水油比时气体消耗量、流量、表观粘度随时间的变化趋势。

The Study on Flow Characteristic of Hydrate Slurry

Hydrate slurry hydrodynamics property at 1.6 MPa and 280.2 K are studied in the flow loop unit for the Diesel oil CH4 G4H8O H2O system at different water-oil ratio(volume).In accordance with the non-Newtonian property of hydrate slurries,a hydrodynamic model for hydrate slurry flow is developed by taking hydrate slurry as pseudo-fluid.The apparent viscosity of hydrate slurry is calculated under various conditions.The variation of gas consumption,flow rate,and the apparent viscosity with time at different water-oil ratio are obtained.The experimental results show that the gas consumption value increases with the increasing of water-oil ratio.After about 100 min,no more gas transforms into hydrate.The flow rate decreases rapidly at the initial stage and tends to reach a stable value gradually.Accordingly,the apparent viscosity of hydrate slurries increases at the initial stage and reaches a stable condition.The relative value of the apparent viscosity increases with the increasing of water-oil ratio.