HCFC-141b水合物在管道中形成及堵塞实验研究

Experimental Investigation on Formation and Blockage of HCFC-141b Hydrates in Pipeline

为了研究水合物浆在管道中的安全流动，在低温室中搭建了内径为42mm、长为30m的不锈钢实验环道，借助于实验环道进行了一氟二氯乙烷（HCFC-141b）水合物在管道中的形成以及堵塞实验．在水过量的条件下，管道中的水合物形态有浆状水合物和泥状水合物两种，在二者的过渡区，水合物的体积分数为30％～40％．管道中水合物的颗粒粒径在154～450μm之间，而且随着水合物含量的增加，平均粒径逐渐增大．当水合物体积分数达到70％时，管道被完全堵塞．当管道中出现泥状水合物后，随着水合物含量的增加，水合物在管道中的聚集加剧，会很快造成整个管道堵塞，因此在运行过程中应避免泥状水合物的出现．

Experiments on formation and blockage of CH3CCl2F（HCFC-141b） hydrate in pipelines were conducted in a newly built flow loop with a diameter of 42 mm and length of 30 m. The results show that there are two kinds of hydrate structures in the pipeline, slurrylike hydrates and slushlike hydrates, with superfluous water in the pipeline and the transition from slurrylike hydrates to slushlike hydrates occurred when the hydrate volume fraction is from 30% to 40%. Diameters of the hydrate particles in the pipeline are mainly from 154 μm to 450 μm and the average diameter of the hydrate particles increases with the increase of the hydrate volume fraction. Moreover, the pipeline is completely blocked with the hydrate when the hydrate volume fraction in the pipeline reaches 70%. In addition, the hydrates aggregate quickly with the increase of the hydrate volume fraction when slushlike hydrates occur, which can result in blockage in the whole pipeline.