含碰撞式分离元件塔结构优化及水力性能研究  

Study on Structure Optimisation and Hydraulic Performance of Collision Type Separation Elements in Separation Tower

作　　者：王念榕[1] 胡大鹏[2] 骆成松 张哲[1] 于洋 赵国安[3] 巨龙[3] 文韵豪[1] Wang Nianrong;Hu Dapeng;Luo Chengsong;Zhang Zhe;Yu Yang;Zhao Guoan;Ju Long;Wen Yunhao(PetroChina Planning and Engineering Institute,Beijing,100083,China;School of Chemical Engineering,Dalian University of Technology,Dalian,Liaoning,116023,China;PetroChina Zhejiang Oilfield Company,Hangzhou,Zhejiang,310023,China)

机构地区：[1]中国石油天然气股份有限公司规划总院,北京100083 [2]大连理工大学化工学院,辽宁大连116023 [3]中国石油天然气股份有限公司浙江油田分公司,浙江杭州310023

出　　处：《天然气与石油》2020年第5期18-24,共7页Natural Gas and Oil

基　　金：国家科技重大专项“大型油气田及煤层气开发”子项“昭通页岩气勘探开发示范工程”(2017 ZX 0506)。

摘　　要：大通量塔可以有效降低塔体直径,节约塔器制造成本,是塔器重要的发展方向。由于塔操作点一般位于雾沫夹带线以上,故提出一种结合高效气液分离方法的塔结构。利用CFD数值模拟方法,分析了新型碰撞式气液分离结构的原理,计算了结构参数对分离效果的影响并对其结构进行优化。基于CFD分析结果,搭建实验平台,研究新型塔水力学性能,结果表明:1)分离元件层数越多、横向间距越小、纵向间距越小,此碰撞分离元件的分离效率越好,但阻力降也越大;2)综合效率和压降以及空间利用率可知,元件层数为2,且横向间距与宽度比值为1.0,纵向间距与宽度比值为0.5时,整个碰撞分离元件的效果最佳;3)当气相流量为定值时,表明改变液相流量对塔板压降无显著作用,当液相流量为定值时,塔板各层压降与气体流量正相关;4)改变液体流量对漏液线及雾沫夹带线无明显影响,且操作范围较广。因此,与传统旋流塔相比,新型含碰撞式分离元件高速塔具有塔径小、处理量大、气液分离效率高及操作范围广等优点,能够大幅降低成本,提升空间利用率,应用前景广泛。The use of high capacity tray can effectively reduce the tower diameter and save fabrication cost of the tower.This is an important development trend of separation tower.Since the operating point of the tower is usually above the entrainment line,a new structure combined with high efficiency gas-liquid separation method is proposed.Through CFD numerical simulation method,the principle of the new collisional gas-liquid separation structure is analyzed,the influence of structural parameters on the separation effect is calculated,and the structure is optimised.Based on the CFD analysis results,an experimental platform is built to study the hydraulic performance of the new type of high capacity tower.The results show that:(1)the more layers of separation elements,the narrower the horizontal spacing and the narrower the vertical spacing,the better the separation efficiency of the collisional separator,but the pressure drop is bigger.(2)considering the comprehensive efficiency,pressure drop and space utilization,when the number of element layers is 2,the ratio of horizontal spacing to width is 1.0,and the ratio of vertical spacing to width is 0.5,the effect of the whole collisional separator is the best.(3)When the gas flow rate is a fixed value,it shows that changing the liquid phase flow rate has no significant effect on the pressure drop of the tray;when the liquid phase flow rate is a fixed value,the pressure drop of each layer of the tray increases with the increase of the gas flow rate significantly.(4)Changing the liquid flow rate has no obvious effect on the leakage line and entrainment line,and the operation range is wide,and the operation flexibility is 75%.Therefore,compared with the traditional cyclone tower,the new high-speed tower has the advantages of small diameter,large processing capacity,high gas-liquid separation efficiency and wide operation range.It can effectively reduce the cost,improve the space utilization ratio and has a wide range of application prospects.

关 键 词：碰撞式气液分离结构 CFD数值模拟 两相实验 分离效率 负荷性能图 

分 类 号：TE962[石油与天然气工程—石油机械设备]