多相混输管道水合物生成及其浆液输送

Gas hydrate formation and hydrate slurry flow in multiphase transportation system

根据经典的理论研究,依托良好的实验条件,对多相混输管道水合物生成及其浆液输送规律进行研究。结果表明:综合结晶本征动力学传热与传质所建立的水合物壳双向生长模型能有效预测油水乳状液下水合物生成过程中的气体消耗量;在高压水合物生成实验环道上,借助FBRM(颗粒粒度分析仪)和PVM(颗粒录影显微仪)设备可探究水合物生成过程中颗粒/液滴的分布规律;考虑到多相混输管道水合物浆液的输送安全性,流动须满足'最低安全流量'的要求;在高压水合物生成实验环道上,可直观研究不同含水率下天然气-水合物浆液的流型特点。

Using classic theories and experimental approaches, gas hydrate formation and hydrate slurry flow in multiphase transportation system were investigated. An inward and outward hydrate growth shell model was developed, taking into con- sideration of the intrinsic kinetics, mass and heat transfer, which could accurately predict the amount of gas consumed during the hydrate formation process. With FBRM and PVM installed, the distribution of the hydrate particles can be observed in high pressure hydrate slurry flow loop. For the safety of hydrate slurry flow in multiphase transportation system, it is necessa- ry for flow to meet the ＂minimum safety flow rate＂ requirement. The characteristics of gas-hydrate slurry flow patterns can be efficiently investigated by experiments carried out in the high pressure hydrate slurry flow loop.