空分设备的氪氙预浓缩技术

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。     

中冶天工承建的济南鲍德稀有气体氪氙精制工程建成投产

<正>2011年3月12日,由中冶天工机电安装分公司(以下简称:中冶天工)承建的济南鲍德气体有限公司(以下简称:济南鲍德)稀有气体氪氙精制工程建成投产,进入正式生产阶段。济南鲍德稀有气体氪氙精制工程采用俄罗斯深冷机械制造股份公司生产的КрКс-0.005/0.00004型稀有气体回收装置,用于提取来自空分设备的一次氪浓缩物中的高纯氪     

空分设备中氪氙稀有气体提取精制技术

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。     

氪氙浓缩物中有害杂质的清除

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。     

国内首套“从液氧中提取高纯氪氙的分离装置”通过专家鉴定

<正>氪、氙等稀有气体广泛应用于国民经济许多重要领域,由于资源奇缺、提取技术落后,高纯氪、氙等稀有气体市场供应一直有较大缺口。2010年,上海启元空分技术发展股份有限公司率先研发"从液氧产品中提取高纯度氪、氙的技术和装置",经过两年来的开发,取得了重大突破,实现了从低氪、氙含量(几十个PPm)的液氧产品中提取高纯度氪、氙的、连续运行的成套装置,提取率达到99%以上、纯度达到99.9995%。该成套装置属国内外首创,     

武钢60000m~3/h空分设备氪氙提取系统调试总结

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。     

杭氧“大型空分设备的氪氙精提取装置”获2015年浙江机械工业科学技术奖一等奖

<正>2016年4月28日,浙江省机械工业联合会召开"2015年度浙江机械工业科学技术奖"颁奖大会,杭氧申报的"大型空分设备的氪氙精提取装置"项目荣获一等奖,并受到表彰。在氪氙提取装置的研究中,杭氧自主开发了氪氙物性库及流程模拟技术平台、全精馏氪氙提取工艺流程、高温催化、中压纯化和低温精馏等关键技术,粗氪塔、氪氙分     

大型空分设备氪氙制取系统调试总结

简要介绍了首钢京唐公司75 000 m~3/h空分设备氪氙提取系统的工艺流程,针对氪氙提取系统调试过程中出现的贫氪氙液氧中甲烷去除不彻底、氪氙除氧塔精馏工况不稳定等问题进行了详细分析,并给出了改进措施,取得了良好效果。     

提高氩、氪、氙提取率的新进展

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。     

空分装置提取贫氪氙的几种方法及其特点

随着氪氙气体在国民经济中的地位日趋升高,空分行业利用空分装置副产品提取氪氙的工艺研究也大力开展,针对空分工艺的特点进行研究和模算,得出了几种切实可行的提取贫氪氙的方法,氪氙提取率高,设备结构紧凑,流程简单,可操作性强。给用户提供更多的选择。     

武钢30000m~3/h空分设备氪氙生产系统浅析

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     

Impact of two circular plates one of which is floating on a thin layer of liquid

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.     

Convective Auto-Oscillations Near a Drop–Liquid Interface in a Horizontal Rectangular Channel

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.     

Freestanding Nanostructures via Layer‐by‐Layer Assembly

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.     

CFD-based erosion modelling of sand screen using dense discrete phase model: Investigating carrier fluid type effect

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.     

兖矿鲁化28000m~3/h空分设备流程和配置的选择

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。     

现代煤化工型空分设备发展现状

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。