吴起原油降凝剂加注工艺研究

经过测试确定了吴起原油加注降凝剂的最优类型,给出吴起原油添加BEM—W降凝剂的最佳浓度和最佳温度,绘制了相应粘温曲线和流变曲线．依据SY／T5767-2002给出原油安全进站温度,这样,为安全、平稳、高效管道输送提供依据．     

原油管道顺序输送中的若干问题

本文针对越来越多的进口原油需在已有原油管道内进行顺序输送这一问题,分析了原油管道顺序输送过程中可能遇到的冷热油混输、管道安全停输时间及混油切割等问题,并提出相应的建议以指导管输方案的制订。     

基于SPH的管道内液压油可视化仿真研究

传统的液压油仿真只是用参数模型进行动力学研究或者沿用一般的流体模拟方法进行模拟,不能针对液压油在管道内流动的具体粘温物理特性进行仿真。针对液压油粘温物理特性设置欠缺、粘温视觉效果不理想的问题,提出了一种适用于双管交叉处漩涡模拟的Stoke非定常平行剪切流模拟方法。该方法利用SPH粒子模型进行拓展,引入人工粘性设定粘温系数变量,模拟不同角度双管交叉处的漩涡。实验结果表明,该方法结合SPH控制容易的特点,增强了液压油粘温特性的分层视觉效果,有效模拟了液压油在不同角度双管交汇处的漩涡现象。     

胶凝原油水力悬浮输送教学实验装置设计研究

我国大部分油田采用加热集输方式输送,能量消耗较大。原油不加热集输技术是油田节能领域的研究热点之一,该文提出原油水力悬浮输送的理念,即使用技术手段将胶凝原油整形为分散颗粒,在不加热的条件下借助水动力实现流态化,并以悬浮状态输送。该文根据原油生产实际,研制了胶凝原油水力悬浮输送模拟实验装置,该装置不仅能服务于多相流方向研究生实践能力的培养,同时也有助于本科流体力学开放性实验的开展,还可以进行胶凝原油整形效果和不同条件下水-胶凝原油流动特性等的实验研究,助力相关科研工作。     

一种低压风稀相输送的最佳管道布置

粉粒体的气力输送是一种古老而实用的技术，现广泛地应用在工业生产的各个门部，如何提高气力输送的经济性，降低能耗，一直是这种技术所研究的中心课题。本从实验出发、研究了粉煤输送的加速段长度，并得出一种最佳的管道布置方案。实验结果具有一定的实用价值。     

深知安全之重，情系检测研究——记天津大学靳世久教授及其获奖项目

现今社会中,纵横交错的地下管道以其运量大、占地少、运输成本低等优势广泛应用于原油、成品油、天然气等领域内的大规模输送,大大提高了运输效率,但是却因为其干线过长,出现泄漏问题不易察觉往往造成无法弥补的损失和严重的环境污染问题而让人叹息不已,因此,建立起精准的管道泄漏检测系统至关重要。近日,记者专程采访了我国原油管道泄漏检测与定位方面的专家、天津大学精密仪器与光电子工程学院靳世久教授,请他介绍了我国在管道泄漏检测方面的研究情况。     

中国石油大学(华东) 油气储运工程实验教学中心

<正>中国石油大学(华东)油气储运工程实验教学中心创建于1953年,率先在国内建立油气储运教学实验室。2009年被批准为山东省实验教学示范中心,2012年被批准为国家实验教学示范中心建设单位。中心下设原油与成品油管道输送实验室、天然气管道输送与燃气输配实验室、油气集输实验室等6个专业教学实验室,现有实验用房面积4 700多m2,主要仪器设备1 881台套,总资产价值2 738万元。中心拥有一支学历层次和学术水平较高、年龄结构合理的师资队伍,现有教     

新型污水管道截流装置研究

污水管道是收集并输送城市污水的重要基础设施。在管道改建、扩建、疏通和破裂维修时,以及道路改扩建时,都需要对管道污水进行快速、安全截流。因此,研究开发具有构造简单、操作方便、经济、劳动强度低、安全系数高等特点的新型截流装置,具有很好的应用前景。本文详细介绍了一种新型污水管道截流装置——闸板式检查井。     

采用点滴降粘工艺提高稠油产量

点滴降粘是一种新型的降粘工艺技术,采用降粘剂滴注技术将稠油降粘荆随蒸汽同步滴入油层,降粘剂均匀分散于蒸汽中,使蒸汽加热稠油的同时,降粘剂与原油充分接触,扩大降粘剂的波及面积,达到降低原油粘度,提高原油产量目的。     

韦水倒虹除险加固技术的提出与实施

针对韦水倒虹钢筋砼管道受水中推移质撞击、管道底部形成冲槽、受力钢筋磨损、钢筋截面减小、结构安全度降低等特点,提出了在钢筋砼管道底部90°范围内进行粘钢补强加固的技术方案,并论述了粘钢补强加固方案的设计原理及施工工艺。     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

库克斯顿城堡

城堡, 是欧洲典型的建筑之一, 每个城堡都有一个美丽的传说或是一段历史。从本期开始, 我们将推出“城堡之旅”, 带各位读者去浏览、观赏欧洲各地的城堡, 开始一段文化与历史的旅途!     

胡主席在印度,我却在中国

Today, Sunday morning, I sit thinking and typing at my computer. My thoughts are in my homeland, India and my body is in China. The body is here and mind there for a good reason. Mr. Hu is president and I am resident and both are in each other's countries (what a difference the absence of one small letter makes!). Mr. Hu will return in a few days and I will stay on longer.