The dirt inside natural gas pipeline is a serious problem during operation. To solve this, a slurry-based pipeline cleaning method is introduced in this paper, taking advantage of particle-pipe collision during transportation, focusing on the slurry composed of polypropylene-particle and water. As the mixing state of the particles and the carrier is a crucial factor during the removal of debris, this is investigated utilizing computational fluid dynamics and discrete element method coupling simulation (CFD-DEM), in which the influence of carrier velocity and particle diameter are addressed. Results show that particles tend to accumulate at the top of the pipe during motion but reduce as flow velocity increases. In addition, at a specific flow velocity, small particles are distributed more uniformly than larger ones. This research provides an understanding of the slurry flow with light particles and establishes a solid foundation for this cleaning method's practical application.

天然气管道内的污垢是运行过程中的严重问题。为了解决这个问题，本文介绍了一种基于浆液的管道清洁方法，该方法利用了运输过程中的颗粒管碰撞，重点研究了由聚丙烯颗粒和水组成的浆液。由于颗粒和载体的混合状态是清除碎屑的关键因素，因此利用计算流体力学和离散元方法耦合模拟（CFD-DEM）对此进行了研究，其中载体速度和粒径的影响是已解决。结果表明，在运动过程中，颗粒倾向于积聚在管道的顶部，但随着流速的增加而减少。另外，在特定的流速下，小颗粒比大颗粒更均匀地分布。