FLNG填料塔内气体分布器适应性试验
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摘要
填料塔作为现代化工工艺生产中不可或缺的处理设备,其性能在一定程度上受到气体分布器的影响,均布效果优良的气体分布器可一定程度提高填料塔的吸收效果。双切向环流式气体分布器因其压降低、液沫夹带量小、气体分布效果较好等特性而被广泛应用于填料塔内。以双切向环流式气体分布器为研究对象,分别选取静止状态和16 s周期下横摇、纵摇、艏摇8°及横荡、纵荡、垂荡150 mm的工况进行实验研究,对海上晃动条件下FLNG填料塔内气体分布器适应性开展研究。结果表明:在6个自由度晃动中,除横荡工况下气体分布不均匀,其系数较静止时增加3.03%,其余晃动工况对气体均布有一定的促进效果,故气体分布器在FLNG填料塔内的设计可与陆上保持一致。
The packed tower is the indispensable processing equipment in modern chemical technique and production, and its performance is partly influenced by the gas distributor. The gas distributor with great uniform distribution effect can, in a way, enhance the absorption effect of packed tower. The twin-tangential annular flow gas distributor is widely applied in packed towers owing to its advantages of small pressure drop, little liquid entrainment and better gas distribution. In this paper, the twin-tangential annular flow gas distributor was taken as the study object to conduct the experimental study on the adaptability of gas distributor in the FLNG packed tower in the sea conditions of sloshing, including quiescent condition, rolling, pitching and yawing by 8 degrees and swaying, surging and heaving by 150 mm in the cycle of 16 s. It is shown that 6 freedom-degree sloshes except the swaying promote the uniform gas distribution. In the working condition of swaying, the gas distribution is not uniform and its coefficient is 3.03% higher than that of quiescent condition. Therefore, the design of gas distributor in the FLNG packed tower can be consistent with that on the land.
The packed tower is the indispensable processing equipment in modern chemical technique and production, and its performance is partly influenced by the gas distributor. The gas distributor with great uniform distribution effect can, in a way, enhance the absorption effect of packed tower. The twin-tangential annular flow gas distributor is widely applied in packed towers owing to its advantages of small pressure drop, little liquid entrainment and better gas distribution. In this paper, the twin-tangential annular flow gas distributor was taken as the study object to conduct the experimental study on the adaptability of gas distributor in the FLNG packed tower in the sea conditions of sloshing, including quiescent condition, rolling, pitching and yawing by 8 degrees and swaying, surging and heaving by 150 mm in the cycle of 16 s. It is shown that 6 freedom-degree sloshes except the swaying promote the uniform gas distribution. In the working condition of swaying, the gas distribution is not uniform and its coefficient is 3.03% higher than that of quiescent condition. Therefore, the design of gas distributor in the FLNG packed tower can be consistent with that on the land.
引文
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[17]LUND-JOHANSEN?,?STVOLD T,BERTHON C F,et al.Full scale measurements of sloshing in LNG tanks[C].Amsterdam:Proceedings,Det Norske Veritas Technical Papers,GASTECH Conference,2011:21-24.
[18]ALAN M B,KEITH N G,WILLIAM J A,et al.Acid gas scrubbing composition:US2010/0329953A1[P].2010-10-03.
[19]张吕鸿,张海涛,姜斌,等.双切向环流气体分布器结构优化的研究[J].化学工程,2008,1(1):34-36,47.ZHANG L H,ZHANG H T,JIANG B,et al.Study on structural optimization of twin-tangential annular flow gas distributor[J].Chemical Engineering(China),2008,1(1):34-36,47.
[2]夏丹,郑云萍,李剑峰,等.浮式液化天然气技术综述[J].天然气与石油,2013,32(3):9-13.XIA D,ZHENG Y P,LI J F,et al.Review on floating LNGproduction facility technology[J].Natural Gas and Oil,2013,32(3):9-13.
[3]颜映霄,徐正斌,王世清.国内外海上油田油气集输及配套技术现状和发展趋势浅析[J].中国海洋平台,2002(2):9-12.YAN Y X,XU Z B,WANG S Q.An analysis on the gathering&transportation technologies of offshore oil and gas and their relevant facilities[J].China Offshore Platform,2002(2):9-12.
[4]唐建峰,张豪杰,程强,等.晃动对填料塔动持液量影响研究[J].化学工程,2017,45(10):54-58.TANG J F,ZHANG H J,CHENG Q,et al.Influence of sloshing on dynamic liquid holdup of packing column[J].Chemical Engineering(China),2017,45(10):54-58.
[5]陈勇,郑玄亮.浮式液化天然气生产储卸船方案设计关键问题浅析[J].天津航海,2016(3):61-64.CHEN Y,ZHENG X L.Analysis on the key problems of the scheme design of floating liquefied natural gas production and unloading ship[J].Navigation of Tianjin,2016(3):61-64.
[6]陈飞,威尔·施密特,杨绍军.天然气液化工艺发展的新趋势--关键技术问题与案例分析[J].化工学报,2015,66(增刊2):22-29.CHEN F,SCHMIDT W,YANG S J.Meet new needs of LNGindustry:liquefaction technology selection and case study[J].CIESC Journal,2015,66(S2):22-29.
[7]王俊美,张道光,卜晓玲,等.浮式LNG装置适用标准探讨[J].石油工业技术监督,2013,29(8):23-27.WANG J M,ZHANG D G,BU X L,et al.Discussion on applicable standards for floating LNG plant[J].Technology Supervision in Petroleum Industry,2013,29(8):23-27.
[8]潘国昌,郭庆丰,杨伯极.填料塔进料气体分布器的研究[J].炼油设计,1995,25(2):28-33.PAN G C,GUO Q F,YANG B J.Investigation on gas distributors in packing towers[J].Petroleum Refinery Engineering,1995,25(2):28-33.
[9]董谊仁,侯章德.现代填料塔技术(三)填料塔气体分布器和其它塔内件[J].化工生产与技术,1996,4(12):5-13.DONG Y R,HOU Z D.The technology for modern packed column(III)gas distributor and other tower internals[J].Chemical Production and Technology,1996,4(12):5-13.
[10]丰存礼.双切环流气体分布器性能及放大规律研究[D].天津:天津大学,2004:1-7.FENG C L.Study on performance and scale-up rule of twintangential annular flow gas distributor[D].Tianjin:Tianjin University,2004:1-7.
[11]刘德新,李鑫钢,徐世民.CFD优化双切向环流式气体分布器设计[J].化工进展,2007(增刊1):127-130.LIU D X,LI X G,XU S M.Optimized design of twin-tangential annular deflector vapor distributor with CFD[J].Chemical Industry and Engineering Progress,2007(S1):127-130.
[12]李焱,喻西崇,王春升,等.浮式液化天然气船FLNG工艺系统关键设备海上适应性分析[J].中国造船,2016(A01):154-161.LI Y,YU X C,WANG C S,et al.Analysis on the marine adaptability of key equipment of FLNG process system for floating liquefied natural gas vessel[J].Shipbuilding of China,2016(A01):154-161.
[13]方华灿,余雄鹰.海上浮式采油用的油气水分离器内的液气界面晃动分析[J].石油矿场机械,1989,18(3):5-11.FANG H C,YU X Y.Analysis of liquid gas interface sloshing in oil and gas water separator for offshore floating oil recovery[J].Oil Field Equipment,1989,18(3):5-11.
[14]唐建峰,杨帆,崔健,等.晃动对FLNG排管式液体分布器性能的影响[J].天然气工业,2016,36(1):123-128.TANG J F,YANG F,CUI J,et al.Effects of sloshing on the performance of FLNG calandria liquid distributors[J].Natural Gas Industry,2016,36(1):123-128.
[15]刘婷婷,阮诗伦,尹江洲,等.浮式液化天然气液货围护系统的失效模式分析[J].海洋工程装备与技术,2014,1(1):51-54.LIU T T,RUAN S L,YIN J Z,et al.Failure modes analysis of box structure of the containment system in FLNG[J].Ocean Engineering Equipment and Technology,2014,1(1):51-54.
[16]HWANG Y,JUNG J,KIM D,et al.An experimental study and numerical simulation on sloshing impact pressures with two identically shaped rectangular 2-dimensional model tanks with different sizes[C].Vancouver:The Eighteenth International Offshore and Polar Engineering Conference,2008:16-28.
[17]LUND-JOHANSEN?,?STVOLD T,BERTHON C F,et al.Full scale measurements of sloshing in LNG tanks[C].Amsterdam:Proceedings,Det Norske Veritas Technical Papers,GASTECH Conference,2011:21-24.
[18]ALAN M B,KEITH N G,WILLIAM J A,et al.Acid gas scrubbing composition:US2010/0329953A1[P].2010-10-03.
[19]张吕鸿,张海涛,姜斌,等.双切向环流气体分布器结构优化的研究[J].化学工程,2008,1(1):34-36,47.ZHANG L H,ZHANG H T,JIANG B,et al.Study on structural optimization of twin-tangential annular flow gas distributor[J].Chemical Engineering(China),2008,1(1):34-36,47.