Study on Simulation and Solution of Hydrate Freezing Blockage in Gas-liquid Mixed Transport Pipeline
Aiming at the problems that the gas carrying capacity of the gas-liquid mixed transport pipeline is weak and the accumulation of liquid in low-lying areas increases the risk of hydrate formation in the pipeline and reduces the pipeline transportation efficiency,the paper uses OLGA software to quantitatively calculate the risk parts of hydrate formation in the pipeline from the No.1 valve chamber to the sub-delivery station in the desert environment,and obtains the concentration requirements of methanol inhibitors.Based on the analysis results,the plugging removal process of"adding hydrate inhibitor+pig pushing methanol slug to defreeze/removing liquid comprehensively"is proposed,which provides reliable theoretical and technical support for plugging removal of mixed transport pipeline.
hydrate blockingpigging processolga simulationmethanol fillingmixed-transport pipelinepetrochemical industry
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