湿天然气输送管道积液发展过程影响因素分析

针对湿天然气输送管道运行过程中存在的积液问题,基于OLGA软件的清管工艺瞬态仿真方法,建立了积液在湿天然气管道中的发展过程预测模型,对积液发展过程及其影响因素进行分析。研究表明:受环境温度、运行压力、介质组成以及管道流速等的影响,湿天然气管道中的液相从凝结析出到发生沉积直至积液量达到稳定的时间往往会持续数天到数月不等;在其他运行条件不变的情况下,湿天然气管道中的积液量随着环境温度的降低、运行压力的增大以及含水量的增加而增加,管道积液发展持续的时间会随着环境温度的降低、含水量的减少以及管道流速的减小而延长。其中,含水量和管道流速是影响湿天然气管道积液量以及积液发展持续时间的关键参数。

Influence Factor Analysis of Liquid Loading Development Process in Wet Natural Gas Transmission Pipelines

In view of the liquid loading problem in the operation process of wet natural gas pipeline,the development process prediction model of liquid loading in wet natural gas pipelines is established based on the transient simulation method of pigging process in OLGA software,and the development process and influence factors of liquid loading are analyzed. The study shows that influenced by ambient temperature,operating pressure,medium composition and pipeline velocity,the liquid phase in wet natural gas pipelines usually lasts from days to months from condensation to deposition until the liquid volume reaches a stable level. With unchanged other operation conditions,the amount of liquid loading increases with the increase of operating pressure,water content and the decrease of ambient temperature. The duration of liquid loading development is prolonged with the decrease of ambient temperature,water content and flow velocity in the pipeline. Among these factors,water content and flow velocity in the pipeline are the key parameters that affect the amount and development duration of liquid loading in wet natural gas pipelines.