共查询到17条相似文献,搜索用时 826 毫秒
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大型空分设备的工艺流程不同,采取的氪、氙预浓缩技术也不同。介绍了适用于不同流程的从液氧中提取氪—氙浓缩物和从富氧液空中提取氪—氙浓缩物的氪、氙预浓缩工艺原理、技术参数和特点。 相似文献
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空分设备中氪氙稀有气体提取精制技术 总被引:1,自引:0,他引:1
介绍了从大型空分设备中提取及精制氪、氙稀有气体的工艺原理和技术特点,综述了在制取氪、氙过程中如何提高过程安全性和氪、氙提取率等方面的技术进展,并对我国氪、氙稀有气体的生产现状与前景进行了概述。 相似文献
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简介氪氙浓缩物中有害杂质的特性和危害,详细介绍在净化氪氙浓缩物过程中提高过程安全性和有效性的新方法,并通过流程实例作了具体分析与总结。 相似文献
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简介武钢60000m3/h空分设备氪氙提取系统的工艺流程,分析在该系统调试过程中出现的贫氪氙液氧中碳氢化合物清除不彻底和氪氙除甲烷塔精馏工况不稳定等问题的原因,对氪氙提取系统采取相应的工艺改进和操作优化后,获得了较好效果。 相似文献
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提高氩、氪、氙提取率的新进展 总被引:3,自引:3,他引:0
介绍了氩、氪、氙提取工艺的新发展。通过改进流程技术和测试与控制技术来提高氩的提取率,氪、氙提取采用多级浓缩流程,工艺分连续工作与间断工作两部分。文章详细地阐述了提高氪氙提取率的方法和途径。图8。 相似文献
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武钢30000m~3/h空分设备氪氙生产系统浅析 总被引:2,自引:2,他引:0
简介了武钢引进的30 0 0 0m3 /h空分设备氪氙连续生产工艺,分析了工艺、设备、控制系统三个方面的主要技术特点以及实际生产中出现的问题和改进措施 相似文献
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The paper deals with the axisymmetric unsteady problem of the collision of two circular plates, one of which is located initially on the surface of a shallow liquid layer and another is falling down on it. The presence of air between the colliding plates is taken into account. Both the air and the liquid are assumed ideal and incompressible and their flows potential. The flows in the liquid layer and between the plates are assumed one-dimensional with corrections for three-dimensional effects close to the plate edges. The present study is focused on the stage of strong interaction between the plates, during which the floating plate is accelerated and the hydrodynamic pressure in the liquid layer takes its maximum value. A simplified model of this interaction is suggested. Velocities of the plates and the hydrodynamic pressure on the bottom of the liquid layer are analytically estimated and compared with experimental results. The model provides the maximum of the hydrodynamic pressure, which can be used at the design stage. It is shown that the air flow between the moving plates is of major importance to explain the low amplitude of the measured hydrodynamic pressures. 相似文献
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The concentration convection in an isothermal liquid near a drop (or an air bubble) clamped between the vertical walls of a horizontal channel is studied numerically within the framework of two simple mathematical models: with and without the surface phase at the drop–liquid interface formed by adsorption/desorption process. The interaction between the buoyancy and the Marangoni convective flows is responsible for the onset of auto-oscillation regime. Such oscillations have been experimentally investigated in other works. In our numeric experiments, more than 20 outbursts of the Marangoni convection were observed. The surfactant distributions obtained numerically at different oscillation phases agree well the experimen tal data. 相似文献
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Freestanding flexible nanocomposite structures fabricated by layer‐by‐layer (LbL) assembly are promising candidates for many potential applications, such as in the fields of thermomechanical sensing, controlled release, optical detection, and drug delivery. In this article, we review recent advances in the fabrication and characterization of different types of freestanding LbL structures in air and at air/liquid and liquid/liquid interfaces, including micro‐ and nanocapsules, microcantilevers, freely suspended membranes, encapsulated nanoparticle arrays, and sealed‐cavity arrays. Several recently developed fabrication techniques, such as spin‐assisted coating, dipping, and micropatterning, make the assembly process more efficient and impart novel physical properties to the freestanding films. 相似文献
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《Advanced Powder Technology》2023,34(9):104144
Sand screens that are widely used in petroleum industry, can fail due to erosion. Since carrying fluid type can have a considerable effect on erosion, in this study, dense discrete phase model (DDPM) was utilized to model sand screen erosion using a CFD-based technique under air, water, and oil flows with four different sand types. The results showed that, erosion was much greater in liquid flows than in air flows. For liquids flows, erosion increases as the uniformity and the sorting coefficients of sand decrease. It has been concluded that, when sand contains various sizes under a certain fluid type, the significance and contribution of particles related parameters on erosion depend on sorting and uniformity of the produced sand. 相似文献
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根据生产实际确定气体产品的技术参数,并结合国内外空分技术水平,选择新建设的28000m3/h空分设备的流程,详细介绍了精馏塔系统和换热器系统等静止设备和空压机、液体泵等运转设备的选型经验。 相似文献
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现代煤化工型空分设备发展现状 总被引:1,自引:0,他引:1
介绍现代煤化工型内压缩流程空分设备的特点,总结4种煤化工型空分流程类型,提出流程选择方法;分析煤化工型空分设备的核心单元部机的技术特点和发展现状,指出现代煤化工型空分设备技术发展的侧重点。 相似文献