共查询到19条相似文献,搜索用时 265 毫秒
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油水重力分离过程油滴浮升规律的实验研究 总被引:4,自引:0,他引:4
在测定油水重力分离器内分散相油滴的浓度、粒度及中位粒径分布的基础上,分析了各区域内油滴的浮升规律. 结果表明,入口区域油水混合液的湍流程度较大,两相存在较充分的纵向掺混,在100 mm高度以上区域,油相相对浓度均达到0.9以上;斜板和平板区域内油相浓度较高,小油滴聚结成大油滴,在50 mm高度处,中位粒径由10 mm升至30 mm以上;平板区域油膜更新速度较慢,流动性较差,聚结效果不及斜板区域;重力沉降区域内流场相对平稳,油相相对浓度多集中于0.4~0.6之间,大油滴已基本浮升至顶部油层得到分离;隔油板前方区域存在涡旋流,部分区域油相相对浓度约升高了0.02,中位粒径增大了1 mm左右,出现返混现象. 相似文献
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聚结构件结构对重力分离器油水分离性能的影响 总被引:2,自引:0,他引:2
为考察聚结构件结构对油水重力分离器分离性能的影响,在理论分析的基础上,采用错搭波纹板、开孔波纹板以及网状波纹板进行了室内实验研究,并从停留时间、油相浓度分布、分离效率、聚结结构前后油相浓度及中位粒径差等方面进行了全面对比。结果表明,网状波纹板结构对小液滴具有较好的聚并作用,能显著提高油水分离效果,缩短停留时间;开孔波纹板次之,而错搭波纹板效果最差。实验发现,良好的亲油疏水性、具有足够的油滴上浮通道以及与混合相具有较大的接触面积,是性能优良的聚结结构所应具备的三个条件。上述工作为进一步开发高效紧凑的油水重力分离设备提供了依据。 相似文献
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介绍了油水混合液在电磁场下的分离过程原理,建立了电磁场油水分离物理及数学模型,并进行了油水分离特性模拟研究,重点研究磁场强度、电流密度、入口流速、油滴粒径等关键因素对油水分离过程和流动特性的影响。结果表明:其他条件不变时,随磁场强度或电流密度的增大,分离效果增强,且存在一个临界电磁力值,只有当实际电磁力大于临界电磁力时,才能实现预期的分离效果;随入口流速的增大,油水混合流在电磁场中的分离作用时间减少,分离效果减弱;随油滴粒径的增大,分散油相受到的浮力增大,分离效果增强。 相似文献
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管式油水分离技术具有占地面积小、分离效率高、成本低等优点,基于管式油水分离原理,设计一种Y型管式油水分离结构,利用Fluent数值模拟软件,采用标准k-ε湍流模型和Mixture多相流模型,对Y型管内部流场特性以及外部参数对分离效率的影响进行了研究。结果表明,Y型管对流体扰动小,内部流场特性稳定不易产生涡流,能够实现油水分离,支管与主管交汇处存在油水分离现象;油水分离效率随着油滴粒径的增大而逐渐提高,油滴粒径越大越利于油相上浮聚集在Y型管上层,能有效提高油水分离效率;入口速度对油水分离效果的影响很大,速度越大,油相上浮时间越短,Y型管的分离效率越低;分离效率随支管分流比的增大而增大,当入口速度为0.5 m/s时,分流比超过0.4后,分离效率不再增加。研究结果为油水分离提供了新思路,可为Y型管的设计提供理论参考。 相似文献
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In this article, a genetic algorithm is used to optimize the separator pressures in a multistage crude oil and multistage gas condensate production unit with four and three separators respectively. This leads to the generation of more accurate results for the quality and quantity of oil remaining in the stock tank for both crude oil and gas condensate production units. Genetic-based optimized pressures for crude oil separators resulted in 1.8% and 2% enhancement in oil remaining in the stock tank for summer and winter respectively. API gravity of the stock tank oil was improved 2.4% in summer and 2.2% in winter. For the gas condensate production unit, optimized pressures can enhance by 8.6% and 8.1% the oil remaining in the stock tank for summer and winter respectively. The API gravity of stock tank liquid also increased by 2.6% for both summer and winter. 相似文献
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通过计算认为甲醇/水分离塔塔板从泡罩改名为高效复合塔板后,能够使贫甲醇中水含量降到0.5%以下,整个装置的运行工艺得到改善,起到较好的节能效果。 相似文献
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应用AspenPlus工程软件对低温甲醇洗装置的甲醇水分离塔进行模拟,并与设计工艺包进行对比。对塔顶回流甲醇在不同含水量下的工况进行优化,将优化数据与该塔实际运行结果进行比较,为生产操作提供数据指导。 相似文献
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超重力反应器制备超细碳酸钙新工艺研究 总被引:1,自引:1,他引:1
以氧化钙为主要原料,利用超重力反应结晶法分离工业尾气氨和二氧化碳以获得高纯氮、同时制备超细碳酸钙的连续新工艺。实验结果表明,该工艺分离效果好,所制备出的碳酸钙为长径比1.5-4,短径0.3-0.8μm、分散性良好的纺锤形碳酸钙。此种规格的碳酸钙在造纸行业有广泛的应用前景。因此该工艺具有良好的环境效益和经济效益。 相似文献
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Vivien J. Cambridge - Sverdrup Technology Inc. Stennis Space Center MS . Joanne M. Wolcott - Author responsible for inquiries. W. David Constant - Hazardous Waste Research Center Louisiana State University Baton Rouge LA . 《Chemical Engineering Communications》1990,92(1):121-137
Emulsihcation and coalescence processes in crude oil/alkaline water systems were examined and their influence on alkaline Hood enhanced oil recovery was assessed. Emulsification mechanisms were investigated under static and dynamic conditions using microvisual techniques. Coalescence rates were measured using the inclined spinning drop tensiometer. The relative impact of interfacial viscosity on coalescence processes was determined through measurements of interfacial shear viscosities. In addition, the influences of chemical composition on ease of emulsification, coalescence rate, and interfacial shear viscosity were examined.
Ease of emulsification was influenced by the composition of the crude oil, the electrolyte concentration, and the partitioning coefficient of surfactants. Coalescence was primarily affected by processes which disrupted the crude oil/water interface. Alkaline flood oil recovery efficiency was promoted by emulsification followed by rapid coalescence to form a stable oil bank. 相似文献
Ease of emulsification was influenced by the composition of the crude oil, the electrolyte concentration, and the partitioning coefficient of surfactants. Coalescence was primarily affected by processes which disrupted the crude oil/water interface. Alkaline flood oil recovery efficiency was promoted by emulsification followed by rapid coalescence to form a stable oil bank. 相似文献