管流中微粒污垢剥蚀机制研究  

Study on Reentrainment of Particulate Fouling in Pipe Flow

作　　者：陈曦宇 王柯栩 Chen Xiyu;Wang Kexu(Wuhan Metrology Research Center of West to East Gas Transmission Company of PipeChina,Wuhan 430073,China)

机构地区：[1]国家石油天然气管网集团有限公司西气东输分公司武汉计量研究中心,湖北武汉430073

出　　处：《广东化工》2022年第19期75-79,共5页Guangdong Chemical Industry

摘　　要：污垢普遍存在于自然界、日常生活和各种工业生产过程中,特别是换热设备的传热过程中,由于污垢沉积而带来的经济损失高达国民生产总值0.28%~0.35%。近年来,随着石油开采行业的发展,原油质量降低,含水量越来越高,热交换设备、地面集输系统的结垢问题也越来越严重。本文总结了现有的微粒污垢模型,同时利用Fluent软件中的DPM模型模拟了管道中不同直径的微米级粒子的沉积和剥蚀状况。其结论是:临界微粒剥蚀直径随沉积位置不同而变化,管顶较小。速度一定时,随着粒径增大,沉积率、粒径剥蚀概率和净沉积率都会增大,粒径沉积多发生在管道的中下部,块状沉积现象加重;当微粒直径一定时,随流速增加,沉积率和净沉积率下降,剥蚀几率增大,管壁微粒沉积趋于均匀,块状沉积现象减弱。Fouling are commonly found in the natural world, daily life and various industrial processes, especially in heat transfer processes of the heat exchange equipments. The economic loss caused by fouling is as high as 0.25 %~0.38 % of Gross National Product. Recent years with the developments of oil extraction, oil property is getting worsen, and water content in oil is getting higher, the fouling in the crude oil heat exchanger and ground gathering and transportation system is becoming serious. This paper summarizes existing particle fouling models, while simulating the deposition and denudation status of micron-scale particles with different diameters in the pipeline by using the DPM model in the Fluent software. The conclusion is that the critical particle erosion diameter varies with the deposition position, and the pipe top is small. When the velocity increases, the deposition rate, the probability of erosion, and the net deposition rate will increase, and the mass deposition rate increases. When the particle diameter increases, the deposition rate increases, and the mass deposition rate decreases.

关 键 词：微粒污垢 剥蚀 FLUENT DPM模型 

分 类 号：TQ[化学工程]