Article(id=1320037932535238705, tenantId=1146029695717560320, journalId=1316781260334530699, issueId=1320037798686605953, articleNumber=null, orderNo=null, doi=10.3969/j.issn.1005-0329.2026.06.002, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1764604800000, receivedDateStr=2025-12-02, revisedDate=1780761600000, revisedDateStr=2026-06-07, acceptedDate=null, acceptedDateStr=null, onlineDate=1792651168235, onlineDateStr=2026-10-22, pubDate=1782748800000, pubDateStr=2026-06-30, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1792651168235, onlineIssueDateStr=2026-10-22, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1792651168235, creator=13701087609, updateTime=1792651168235, updator=13701087609, issue=Issue{id=1320037798686605953, tenantId=1146029695717560320, journalId=1316781260334530699, year='2026', volume='54', issue='6', pageStart='1', pageEnd='122', issueExtLink='null', onlineDate='null', pubDate='1782748800000', pubDateStr='2026-06-30', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1792651136322, creator='13701087609', updateTime=1792656254917, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1320059267693003413, tenantId=1146029695717560320, journalId=1316781260334530699, issueId=1320037798686605953, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1320059267693003414, tenantId=1146029695717560320, journalId=1316781260334530699, issueId=1320037798686605953, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=9, endPage=16, ext={EN=ArticleExt(id=1320037932690427954, articleId=1320037932535238705, tenantId=1146029695717560320, journalId=1316781260334530699, language=EN, title=Experimental study on the performance of a vertical separator with built‑in frustum electrode, columnId=null, journalTitle=Fluid Machinery, columnName=null, runingTitle=null, highlight=null, articleAbstract=

Aiming at the disadvantages of traditional crude oil treatment processes,including large floor area,low efficiency and long treatment duration of gravity settling tanks,a vertical separator equipped with built‑in frustum electrodes was developed in this study.A high‑frequency and high‑voltage pulsed alternating current(AC) power supply was adopted,and the water content at the oil outlet was selected as the evaluation index for separation performance.Demulsification and dehydration experiments of the novel vertical separator with built‑in frustum electrodes were carried out to investigate the influences of split ratio,inlet water content,inlet flow rate,and electric field parameters(voltage,frequency,and electric field action time) on the separation performance.The experimental results indicate that there exists an optimal combination of electric field parameters for the vertical separator.Under the operating conditions of an inlet water content of 30%,an inlet flow rate of 100 mL/min and a split ratio of 0.3,the optimal electric field action time,electric field voltage and electric field frequency are 16.5 min,1.85 kV and 3.2 kHz,respectively,achieving a minimum water content of 0.79% at the oil outlet.The influencing degrees of various factors on the separator performance follow the order of electric field voltage>electric field frequency>electric field action time.This study provides a theoretical reference and technical guidance for the research,development and engineering application of high‑efficiency vertical separators for the dehydration of crude oil emulsions.

, authors=Chao SHANG1, Wei LI2, 3, Yi SHI2, 3, Haibo XU1, Ming ZHANG1, Weizheng AN1, Jiaqing CHEN2, 3, 4, authorsList=Chao SHANG, Wei LI, Yi SHI, Haibo XU, Ming ZHANG, Weizheng AN, Jiaqing CHEN, authorCompany=null, correspAuthors=Jiaqing CHEN, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1320037936733737035, articleId=1320037932535238705, tenantId=1146029695717560320, journalId=1316781260334530699, language=CN, title=内置锥台电极立式分离器性能试验研究, columnId=1317484286475883136, journalTitle=流体机械, columnName=试验研究, runingTitle=null, highlight=null, articleAbstract=

针对传统原油处理工艺中重力沉降罐占地面积大、效率低、处理时间长等问题,设计研制了内置锥台电极的立式分离器,采用高频/高压脉冲交流电源,以油出口含水率为分离性能评价指标,开展了内置锥台电极的立式分离器破乳脱水试验,探究了不同分流比、乳化液入口含水率、入口流量,以及电场参数(电压、频率、电场作用时间)对分离性能的影响规律。结果表明,立式分离器存在最优电场参数,在乳化液入口含水率30%、入口流量100 mL/min、分流比0.3条件下,最佳电场作用时间为16.5 min,电场电压为1.85 kV,电场频率为3.2 kHz,对应油出口含水率可达0.79%。不同因素对分离器性能影响程度排序为电场电压>电场频率>电场作用时间。研究结果为原油乳化液脱水用高效立式分离器的研发与推广应用提供参考和指导。

, authors=尚超1, 李威2, 3, 石熠2, 3, 徐海波1, 张明1, 安维峥1, 陈家庆2, 3, 4, authorsList=尚超, 李威, 石熠, 徐海波, 张明, 安维峥, 陈家庆, authorCompany=null, correspAuthors=陈家庆, authorNote=

尚超(1984),男,硕士,高级工程师,主要研究方向为海上油气田生产装备关键技术,通信地址:100027北京市朝阳区太阳宫南街6号院中海油大厦中海油研究总院有限责任公司工程研究设计院,E-mail:。

, correspAuthorsNote=
陈家庆(1970),男,博士,教授,博士研究生导师,主要研究方向为环保多相流高效分离技术及设备,通信地址:102617北京市大兴区清源北路19号北京石油化工学院机械工程学院,E-mail:。
, copyrightStatement=作者向本刊所投稿件一经本刊录用,则该论文的复制权、发行权、信息网络传播权、翻译权、汇编权等权利视为自动转让给本刊。本刊为国内各主要数据库收录期刊,本刊所发表的稿件将同时通过互联网进行网络出版或提供信息服务。, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=YNfMcCZUR01+B9RKLtPOPw==, magXml=IYftJE/swUUdAK+zf25GeQ==, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=PSAM1vLnEpHhDzJIwX28dQ==, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=Ze4Qrru76+qjtNX5hJgY8g==, mapNumber=null, fund=null)}, authors=[Author(id=1320037937522266201, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037932535238705, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=shangchao@cnooc.com.cn, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1320037937685844059, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037932535238705, authorId=1320037937522266201, language=EN, stringName=Chao SHANG, firstName=Chao, middleName=null, lastName=SHANG, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=1, address=1Engineering Research & Design Department,CNOOC Research Institute Co.,Ltd.,Beijing 100027,China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1320037937752952924, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037932535238705, authorId=1320037937522266201, language=CN, stringName=尚超, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=1, address=1中海油研究总院有限责任公司 工程研究设计院,北京 100027, bio={"content":"

尚超(1984),男,硕士,高级工程师,主要研究方向为海上油气田生产装备关键技术,通信地址:100027北京市朝阳区太阳宫南街6号院中海油大厦中海油研究总院有限责任公司工程研究设计院,E-mail:。

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尚超(1984),男,硕士,高级工程师,主要研究方向为海上油气田生产装备关键技术,通信地址:100027北京市朝阳区太阳宫南街6号院中海油大厦中海油研究总院有限责任公司工程研究设计院,E-mail:。

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figureFileSmall=S84JfgBCg93AI+kjqvx6zQ==, figureFileBig=OkM2tDKlD34Sy+uqi2zlEg==, tableContent=null), ArticleFig(id=1320037950864347299, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037932535238705, language=EN, label=Tab.1, caption=

Key structural parameters of vertical separator

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参数数值
罐体高度H/mm380
罐体直径D/mm100
入口管直径Di/mm8
油出口管直径Do/mm8
水出口管直径Dw/mm8
锥台大端直径D1/mm70
锥台高度h/mm30
锥台倾角α/(°)45
锥台数目n/个7
), ArticleFig(id=1320037950935650468, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037932535238705, language=CN, label=表1, caption=

立式分离器关键结构参数

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参数数值
罐体高度H/mm380
罐体直径D/mm100
入口管直径Di/mm8
油出口管直径Do/mm8
水出口管直径Dw/mm8
锥台大端直径D1/mm70
锥台高度h/mm30
锥台倾角α/(°)45
锥台数目n/个7
), ArticleFig(id=1320037951116005541, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037932535238705, language=EN, label=Tab.2, caption=

Average electric field strength under different voltages

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项目电压/kV
1.41.61.82.02.22.4
数值/(kV⋅cm-1)0.810.931.091.211.331.45
), ArticleFig(id=1320037951204085926, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037932535238705, language=CN, label=表2, caption=

不同电压下的平均电场强度

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项目电压/kV
1.41.61.82.02.22.4
数值/(kV⋅cm-1)0.810.931.091.211.331.45
), ArticleFig(id=1320037951304749223, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037932535238705, language=EN, label=Tab.3, caption=

Factors and levels for response surface experiments

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水平因素
A(电场作用时间)/minB(电场电压)/kVC(电场频率)/kHz
-1121.41.5
0161.83.0
1202.24.5
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响应面试验因素及水平

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水平因素
A(电场作用时间)/minB(电场电压)/kVC(电场频率)/kHz
-1121.41.5
0161.83.0
1202.24.5
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Response surface methodology(RSM) experimental results

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试验顺序电场作用
时间/min
电场电压/kV电场频率/kHz油出口含水率/%
1121.433.16
2161.44.53.92
3202.231.53
4161.830.93
5201.81.53.35
6121.84.52.90
7161.41.54.03
8162.24.51.25
9162.21.53.22
10161.830.91
11122.232.87
12201.84.52.61
13121.81.53.45
14161.830.94
15161.830.89
16201.432.21
17161.830.95
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响应面法试验结果

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试验顺序电场作用
时间/min
电场电压/kV电场频率/kHz油出口含水率/%
1121.433.16
2161.44.53.92
3202.231.53
4161.830.93
5201.81.53.35
6121.84.52.90
7161.41.54.03
8162.24.51.25
9162.21.53.22
10161.830.91
11122.232.87
12201.84.52.61
13121.81.53.45
14161.830.94
15161.830.89
16201.432.21
17161.830.95
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内置锥台电极立式分离器性能试验研究
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尚超 1 , 李威 2, 3 , 石熠 2, 3 , 徐海波 1 , 张明 1 , 安维峥 1 , 陈家庆 2, 3, 4
流体机械 | 试验研究 2026,54(6): 9-16
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流体机械 |试验研究 2026 , 54 (6) : 9 -16
内置锥台电极立式分离器性能试验研究
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尚超(1984),男,硕士,高级工程师,主要研究方向为海上油气田生产装备关键技术,通信地址:100027北京市朝阳区太阳宫南街6号院中海油大厦中海油研究总院有限责任公司工程研究设计院,E-mail:。

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尚超(1984),男,硕士,高级工程师,主要研究方向为海上油气田生产装备关键技术,通信地址:100027北京市朝阳区太阳宫南街6号院中海油大厦中海油研究总院有限责任公司工程研究设计院,E-mail:。

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尚超1 , 李威2, 3, 石熠2, 3, 徐海波1, 张明1, 安维峥1, 陈家庆2, 3, 4
作者信息
  • 1中海油研究总院有限责任公司 工程研究设计院,北京 100027
  • 2北京石油化工学院 机械工程学院,北京 102617
  • 3深水油气管线关键技术与装备北京市重点实验室,北京 102617
  • 4北方工业大学 机械与材料工程学院,北京 100144
通讯作者:
陈家庆(1970),男,博士,教授,博士研究生导师,主要研究方向为环保多相流高效分离技术及设备,通信地址:102617北京市大兴区清源北路19号北京石油化工学院机械工程学院,E-mail:。
作者简介:

尚超(1984),男,硕士,高级工程师,主要研究方向为海上油气田生产装备关键技术,通信地址:100027北京市朝阳区太阳宫南街6号院中海油大厦中海油研究总院有限责任公司工程研究设计院,E-mail:。

Experimental study on the performance of a vertical separator with built‑in frustum electrode
Chao SHANG1 , Wei LI2, 3, Yi SHI2, 3, Haibo XU1, Ming ZHANG1, Weizheng AN1, Jiaqing CHEN2, 3, 4
Affiliations
  • 1Engineering Research & Design Department,CNOOC Research Institute Co.,Ltd.,Beijing 100027,China
  • 2School of Mechanical Engineering,Beijing Institute of Petrochemical Technology,Beijing 102617,China
  • 3Beijing Key Laboratory of Key Technologies and Equipment for Deepwater Oil and Gas Pipelines,Beijing 102617,China
  • 4School of Mechanical and Material Engineering,North China University of Technology,Beijing 100144,China
出版时间: 2026-06-30 doi: 10.3969/j.issn.1005-0329.2026.06.002
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针对传统原油处理工艺中重力沉降罐占地面积大、效率低、处理时间长等问题,设计研制了内置锥台电极的立式分离器,采用高频/高压脉冲交流电源,以油出口含水率为分离性能评价指标,开展了内置锥台电极的立式分离器破乳脱水试验,探究了不同分流比、乳化液入口含水率、入口流量,以及电场参数(电压、频率、电场作用时间)对分离性能的影响规律。结果表明,立式分离器存在最优电场参数,在乳化液入口含水率30%、入口流量100 mL/min、分流比0.3条件下,最佳电场作用时间为16.5 min,电场电压为1.85 kV,电场频率为3.2 kHz,对应油出口含水率可达0.79%。不同因素对分离器性能影响程度排序为电场电压>电场频率>电场作用时间。研究结果为原油乳化液脱水用高效立式分离器的研发与推广应用提供参考和指导。

立式分离器  /  高频/高压脉冲交流电源  /  电场破乳  /  电场电压

Aiming at the disadvantages of traditional crude oil treatment processes,including large floor area,low efficiency and long treatment duration of gravity settling tanks,a vertical separator equipped with built‑in frustum electrodes was developed in this study.A high‑frequency and high‑voltage pulsed alternating current(AC) power supply was adopted,and the water content at the oil outlet was selected as the evaluation index for separation performance.Demulsification and dehydration experiments of the novel vertical separator with built‑in frustum electrodes were carried out to investigate the influences of split ratio,inlet water content,inlet flow rate,and electric field parameters(voltage,frequency,and electric field action time) on the separation performance.The experimental results indicate that there exists an optimal combination of electric field parameters for the vertical separator.Under the operating conditions of an inlet water content of 30%,an inlet flow rate of 100 mL/min and a split ratio of 0.3,the optimal electric field action time,electric field voltage and electric field frequency are 16.5 min,1.85 kV and 3.2 kHz,respectively,achieving a minimum water content of 0.79% at the oil outlet.The influencing degrees of various factors on the separator performance follow the order of electric field voltage>electric field frequency>electric field action time.This study provides a theoretical reference and technical guidance for the research,development and engineering application of high‑efficiency vertical separators for the dehydration of crude oil emulsions.

vertical oil‑water separator  /  high‑frequency/high‑voltage pulsed AC power supply  /  electric field demulsification  /  electric field voltage
尚超, 李威, 石熠, 徐海波, 张明, 安维峥, 陈家庆. 内置锥台电极立式分离器性能试验研究. 流体机械, 2026 , 54 (6) : 9 -16 . DOI: 10.3969/j.issn.1005-0329.2026.06.002
Chao SHANG, Wei LI, Yi SHI, Haibo XU, Ming ZHANG, Weizheng AN, Jiaqing CHEN. Experimental study on the performance of a vertical separator with built‑in frustum electrode[J]. Fluid Machinery, 2026 , 54 (6) : 9 -16 . DOI: 10.3969/j.issn.1005-0329.2026.06.002
随着我国大部分油田进入开采中后期,油井采出液含水率上升,给原油高效脱水处理带来了挑战。陆上油田常采用大罐热化学沉降方法进行原油脱水。由于处理的液量增大,导致立式沉降罐处理负荷增加、停留时间延长,原油脱水效果难以保证。虽然通过提高加热温度、增加化学药剂用量等方法,能够在一定程度上提升沉降罐的分离性能,但这类方法也带来了能耗上升、处理成本偏高等问题,亟需开发高效的原油破乳脱水设备[1-5]。由斯托克斯重力沉降公式可知,增大分散相液滴粒径能够显著提高其沉降速度。通过在立式沉降罐内部引入能耗低、作用时间短的电场破乳技术,能够有效增大分散相液滴粒径,提升其脱水性能。
目前,针对内置电极组件立式分离器的研究较少,相关研究主要聚焦于对常规立式分离器内部结构优化及流场特性分析。PANTOJA‑CASTRO等[6]通过数值模拟方法,研究了入液分布管管孔直径的分布对立式罐中乳化液流速及分布效果的影响,结果表明,当第一个管孔直径为0.6 mm,增量为0.6 mm时,乳化液在管孔处的流动更均匀,且流速分布更好。王春辉等[7]将溢流沉降罐调节水箱内堰板高度由350 mm提高到500 mm,并将集水管线的开口方向由向上改为向下,使溢流沉降罐处理后原油含水率降低至小于0.5%。王涛华[8]通过数值模拟方法对沉降罐内配液管和集油槽进行了结构优化,发现当配液管开口方向向下且距罐底高度6.3 m、配液管根数为6根、孔数为12个、等间距排布、集油槽为环壁型集油槽且距罐底高度10.5 m、集油槽宽度200 mm时,油水分离效果最好。孙东方[9]对立式沉降罐内部流场进行了数值模拟分析,通过增加斜板以优化其内部结构,使沉降罐平均除油率由改进前的53.6%提高到70.1%。ROMMEL等[10]对板式分离器斜板上液滴聚结进行了理论和试验研究,提出了液滴尺寸的预测模型。文献[11]中提出了锥台电极结构的紧凑型静电聚结器;文献[12]中采用葵花籽油模拟轻质原油油包水体系进行了相关试验,结果表明,在相同电压下,锥台电极的破乳效果优于传统圆柱电极与平行板电极,聚结效果更好。
现有研究多集中于污水除油用立式沉降罐,而针对原油脱水用立式沉降罐的研究相对较少,且主要是利用数值模拟方法对沉降罐内部结构进行优化改进。因此,本文设计并研制一种内置锥台电极的立式分离器,该设备采用高频/高压脉冲交流电源,通过电场强化其沉降脱水效果;通过试验方法系统探究电场参数(电压、频率、电场作用时间)和工况参数〔入口含水率、分流比(水出口流量与入口流量比值)、入口流量〕等对分离性能的影响规律。研究成果不仅为油井采出液高效脱水设备的推广应用提供理论参考,也可应用于海上平台三相分离器的结构优化及性能提升。
该立式分离器结构如图1所示。主要由入口管、油出口管、水出口管、锥台电极组件、立式罐体等组成。乳化液通过入口管进入分离器中,在锥台电极区域通过“电场+浅层沉降”作用促进分散相水颗粒聚结长大,并加速其从油相中沉降分离,最终从分离器底部水出口管排出,油相从顶部油出口管排出。电极组件由多块金属锥台电极组成,相邻电极分别作为高压极和接地极,形成非均匀电场,相邻电极间距为14 mm,电极组件总高度98 mm。设备设计处理量为100 mL/min,停留时间为20 min。立式分离器关键结构参数见表1。
立式分离器性能试验的具体工艺流程如图2所示。主要包括立式分离器、高频/高压脉冲交流电源(输出电压20 kV、输出频率0.5~5kHz,均连续可调)、示波器(美国Tektronix公司)、储油罐、储水罐、原料罐、蠕动泵(BT600-1F型,重庆科耐普蠕动泵有限公司)、在线剪切机(F30Z型,美国FLUKO公司)、自动搅拌器(LC-ES-60SH型,上海力辰邦西仪器科技有限公司)等。利用10号工业级白油(密度820 kg/m3,黏度10 mPa⋅s)和自来水分别作为连续相和分散相,借助在线剪切机配制油包水(W/O)型乳化液。乳化液含水率为30%,剪切机转速为17 000 r/min,剪切时间10 min,Span 80乳化剂用量为4 g/L[13]。利用稳定性分析仪(法国Formulaction SA公司)测量所配制乳化液的稳定性指数(TSI),结果见图3。30 min内乳化液TSI值低于1,表明所配制的乳化液非常稳定。
试验过程中,通过调节立式分离器底部水出口的流量来改变分流比,开启高频/高压脉冲交流电源施加电场,间隔一定时间从立式分离器顶部油出口处取样,利用水分测定仪(LGCVL-5000JN型,天津逻洁克科技有限公司)测量油出口的含水率,作为立式分离器破乳脱水性能的评价指标。
由于锥台电极之间为非均匀电场,无法直接通过理论计算出相邻电极间的电场强度值。因此,基于COMSOL Multiphysics多物理场仿真软件,对立式分离器内部锥台电极组件的电场强度分布进行数值模拟,乳化液的相对介电常数为5.3[14]。在数值模拟中,空间维度采用“二维”,物理场采用“静电(es)”,计算方法选择“稳态”计算方法。控制方程仅为电场的控制方程,具体如下:
∇·D=ρv
E=-∇V
式中,∇·D为电位移矢量D的散度,描述的是电场在某一点的“源/汇”强度;ρv为体电荷密度,即单位体积内的自由电荷总量;E为电场强度矢量;∇V为电势V的梯度,指向电势升高最快的方向。
施加的电场电压分别为1.4,1.6,1.8,2.0,2.2,2.4 kV。采用COMSOL软件中的选项“派生值”中“表面平均值”功能,计算出锥台电极区域的平均电场强度,如表2所示。
(1)电场电压。
将乳化液入口含水率30%、电场频率3 kHz、占空比10%、分流比0.3、入口流量100 mL/min保持不变,探究不同电场电压对立式分离器脱水性能的影响规律。在0~25 min内,间隔4 min测量油出口含水率,结果如图4所示。可以看出,在同一电压下,随着电场作用时间的增加,油出口含水率迅速降低,超过20 min后趋于平缓;在同一电场作用时间下,随着电压的增加,油出口含水率先降低后增加,存在最佳电压为1.8 kV,此时,电场作用16 min,即可将油出口含水率由30%降低至1%以下。分析其原因如下:液滴在非均匀交流电场中主要受到偶极子力和介电泳力作用,电场力大小与电场强度呈平方关系[15-17]。液滴的拉伸程度主要取决于电场强度。适宜的电场强度可增强液滴极化和偶极相互作用,促进液滴变形、接触及聚结;而过高的电场强度则可能引起液滴过度拉伸、界面失稳甚至破碎,从而降低聚结和分离效果[18-19]。
(2)电场频率。
将乳化液入口含水率30%、电场电压1.8 kV、占空比10%、入口流量100 mL/min、分流比0.3保持不变,探究不同电场频率对立式分离器脱水性能的影响规律,结果如图5所示。
同一电场频率下,随着电场作用时间的增加,油出口含水率迅速降低,并在20 min后趋于平稳;在同一电场作用时间下,随着电场频率的增加,油出口含水率先降低后增加,存在最优电场频率为3 kHz,此时,电场作用16 min,即可将油出口含水率由30%降低至1%以下。分析其原因如下:电场频率主要影响液滴的变形速率和振荡行为,适当提高频率可增强液滴周期性拉伸与界面扰动,促进液滴接触后液膜排液和破裂,当外加电场频率与液滴固有频率接近时发生共振现象,液滴振幅最大,相应变形程度也最大,此时油水界面膜处于极不稳定状态,界面膜极易破碎而使分散相液滴发生聚结,相应的破乳分离效果最好,对应的电场频率即为该乳化液破乳分离的最优电场频率[20];过低频率下,液滴变形较充分但周期扰动不足,过高频率会导致液滴响应滞后,降低有效变形幅度,不利于液滴进一步聚结[21]。
(1)入口含水率。
将立式分离器的分流比0.3、电场电压1.8 kV、电场频率3 kHz、入口流量100 mL/min、占空比10%保持不变,探究入口含水率对立式分离器脱水性能的影响规律,结果如图6所示。可以看出,同一入口含水率下,随着电场作用时间的增加,油出口含水率迅速降低,并在20 min后基本保持平稳;在同一电场作用时间下,随着入口含水率的增加,油出口含水率呈增加趋势,即入口含水率越高,乳化液处理难度越大,且当入口含水率为30%及以下时,电场作用时间仅需16 min,即可将油出口含水率处理至1%以下。
图7示出16 min时,不同入口含水率的性能曲线。由于采用了高频/高压脉冲交流电源,突破了金属裸电极仅能处理含水率30%以下原油的局限,当乳化液入口含水率为40%时,立式分离器仍然能正常运行,且油出口含水率可达2%以下,分离效果较好。针对含水率40%乳化液开展的显微观测试验显示,其并未完全发生反相,仍然以油包水型乳化液为主。在试验过程中,将电压逐渐增加至设定值,能够一定程度上避免发生短路,从而保证立式分离器正常运行。
(2)分流比。
将乳化液入口含水率30%、电场电压1.8 kV、电场频率3 kHz、占空比10%、入口流量100 mL/min保持不变,探究不同分流比对立式分离器脱水性能的影响规律,结果如图8所示。可以看出,同一分流比下,随着电场作用时间的增加,油出口含水率迅速降低;同一电场作用时间下,随着分流比的增加,油出口含水率呈下降趋势。当分流比大于0.3,电场作用时间为16 min时,可使油出口含水率降低至1%以下;当电场作用时间为20 min时,将分流比控制在0.2~0.4区间内,均可将油出口含水率稳定控制在1%以下。
图9示出电场作用时间为16 min时,油出口含水率随分流比的变化曲线。可以看出,分流比越大,油出口含水率越小,立式分离器性能越好。
(3)入口流量。
将乳化液含水率30%、电场电压1.8 kV、电场频率3 kHz、分流比0.3、占空比10%保持不变,探究不同入口流量对立式分离器脱水性能的影响规律,结果如图10所示。可以看出,同一入口流量下,随电场作用时间的增加,油出口含水率迅速降低;同一电场作用时间下,随入口流量的降低,油出口含水率降低,立式分离器性能提高。
图11示出电场作用时间16 min时,不同入口流量下的性能曲线。可以看出,入口流量升高,相应油出口含水率升高,立式分离器处理效果变差。分析其原因如下:入口流量增大导致停留时间降低,从而使油出口含水率升高。
根据单因素试验结果,将油出口含水率作为响应值,选择电场电压、电场频率和电场作用时间共3个因素为自变量,使用Design-Expert 13软件,进行三因素三水平的试验设计。试验因素及水平见表3。
在立式分离器入口含水率30%、入口流量100 mL/min、分流比0.3的条件下,开展三因素三水平响应面试验,结果如表4所示。
运用Design-Expert 13软件对油出口含水率(Y1)试验结果进行方差分析,得到二次多项式回归方程如下:
Y1=32.50-1.44A-15.48B-2.514C-0.061AB-0.0079AC-0.775BC+0.046 59A2+4.831 25B2+6 258C2
模型R2=0.938 9,表明实测值与预测值吻合度较高,可以很好地反映电场参数设置与响应值的关系,由此可以预测得出最佳参数。由P值可得,3个因素对油出口含水率的影响程度排序如下:电场电压>电场频率>电场作用时间。
利用Design-Expert 13软件,绘制单因素交互作用等高线和响应曲面图(见图12),探究影响油出口含水率的因素。可以看出,电场电压(B)与电场频率(C)交互作用显著,电场作用时间(A)与电场电压(B)及电场作用时间(A)与电场频率(C)交互作用不显著。以最低油出口含水率为目标,根据分析结果预测的最佳参数组合如下:电场作用时间16.5 min,电场电压1.85 kV,电场频率3.2 kHz。在此参数条件下,预测的油出口含水率为0.79%。
(1)在单因素试验条件下,立式分离器存在最优电场电压和电场频率。当入口含水率30%、入口流量100 mL/min、分流比0.3时,最优电场电压和电场频率分别为1.8 kV,3 kHz。临界电场作用时间为16 min,超过该作用时间,分离效率提升不显著。
(2)立式分离器油出口含水率随入口含水率、分流比、入口流量的增加,均呈单调递减趋势,当入口含水率不高于30%时,在电场电压1.8 kV、电场频率3 kHz的条件下,电场作用时间为16 min,即可将油出口含水率降低至1%以下。
(3)基于高频/高压脉冲交流电源能够将锥台金属电极所适用的乳化液含水率提高至40%。当电场电压1.8 kV、电场频率3 kHz时,电场作用16 min可将油出口含水率降低到2%以下,分离效果较好
(4)通过响应面法得到不同参数对立式分离器脱水性能的影响程度排序:电场电压>电场频率>电场作用时间。最优参数组合:电场作用时间16.5 min,电场电压1.85 kV,电场频率3.2 kHz。在此参数条件下,预测的油出口含水率为0.79%。

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doi: 10.3969/j.issn.1005-0329.2026.06.002
  • 接收时间:2025-12-02
  • 首发时间:2026-10-22
  • 出版时间:2026-06-30
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  • 收稿日期:2025-12-02
  • 修回日期:2026-06-07
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    1中海油研究总院有限责任公司 工程研究设计院,北京 100027
    2北京石油化工学院 机械工程学院,北京 102617
    3深水油气管线关键技术与装备北京市重点实验室,北京 102617
    4北方工业大学 机械与材料工程学院,北京 100144

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陈家庆(1970),男,博士,教授,博士研究生导师,主要研究方向为环保多相流高效分离技术及设备,通信地址:102617北京市大兴区清源北路19号北京石油化工学院机械工程学院,E-mail:。
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2种不同金属材料的力学参数
科
Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)
属
Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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