气-液-固三相过滤过程滤芯压降特性  

Pressure Drop Characteristics of Filter Elements in Gas-Liquid-Solid Filtration

作　　者：杨云兰 常程 冯艳丽 刘涛 金晶 王亚倩 刘俊杰 吴小林 YANG Yunlan;CHANG Cheng;FENG Yanli;LIU Tao;JIN Jing;WANG Yaqian;LIU Junjie;WU Xiaolin(Beijing Key Laboratory of Process Fluid Filtration and Separation,College of Mechanical and Transportation Engineering,China University of Petroleum-Beijing,Beijing 102249,China;China Petroleum Pipeline Research Institute Co.,Ltd.,Langfang 065000,China;China Petroleum Pipeline Machinery Manufacture Co.,Ltd.,Langfang 065000,China)

机构地区：[1]中国石油大学(北京)机械与储运工程学院过程流体过滤与分离技术北京市重点实验室,北京102249 [2]中国石油天然气管道科学研究院有限公司,河北廊坊065000 [3]中油管道机械制造有限责任公司,河北廊坊065000

出　　处：《石油学报(石油加工)》2025年第2期406-415,共10页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家自然科学基金项目(52374070);中国石油大学(北京)科研基金项目(2462024QNXZ002)资助。

摘　　要：为了深入研究天然气输送过程中气体净化用过滤分离元件的气-液-固三相过滤性能,采用等效填充密度及理论填充密度表征粉尘沉积特性的方法,探究了滤芯精度和粉尘粒径对含液及含尘过滤过程压降变化影响规律。结果表明:对于洁净滤芯气-固过滤过程,较小粒径粉尘更易堵塞滤材孔隙,导致在相同粉尘量沉积情况下滤芯压降增长速率增大,在相同时间内,同种滤芯的等效填充密度均高于理论填充密度,两者之间差异随着滤芯精度降低愈加显著;对于含液滤芯气-固过滤过程,滤芯压降随时间呈现线性增长,其压降增长速率随滤芯精度增高而增大,此过程等效填充密度和理论填充密度吻合性良好,平均偏差小于10%;对于含尘滤芯气-液过滤过程,滤芯压降首先在液体冲刷作用下逐渐降低,而后再次上升并最终达到稳定,在气-液过滤冲刷阶段,滤芯精度越低,滤材内粉尘结构越为松散,抗冲刷能力更弱,并且粉尘粒径增大将减缓压降的下降。To deeply investigate the gas-liquid-solid filtration performance of industrial filter elements used for gas purification during natural gas transmission,the influence of filtration efficiency grade and dust particle size on the pressure drop variation during the operation of liquid-and dust-holding filter elements was investigated by a method characterizing the dust deposition characteristics with the equivalent packing density and theoretical packing density.The results show that in the gas-solid filtration process of clean filter element,filter pores are more easily clogged by the dusts with smaller particle size,resulting in an increase in the growth rate of pressure drop under the same amount of dust deposition.In the same period of time,the equivalent packing density is higher than the theoretical packing density for the same filter element,between which the difference becomes more significant with the decrease of filtration efficiency grade.In the gas-solid filtration process of the liquid-holding filter element,the pressure drop increases linearly with time,and the growth rate of pressure drop increases with the increase of filtration efficiency grade.The equivalent packing density is in good agreement with the theoretical packing density,where the average deviation is less than 10%.In the gas-liquid filtration process of the dust-loaded filter element,pressure drop first gradually decreases under the action of liquid washing,and then rises again and finally reaches stability.In the process of gas-liquid filtration and liquid washing,the lower the filtration efficiency grade,the looser the dust structure in the filter material and the weaker the anti-washing ability.Furthermore,the increase of dust particle size can slow down the decrease of pressure drop.

关 键 词：过滤 压降 粉尘 液滴 滤芯 气溶胶 天然气 

分 类 号：TE89[石油与天然气工程—油气储运工程]