简介：目前工业制氧所使用的方法不近相同,采用的控制系统千差万别,仪表选型更是琳琅满目。基于以上原因,本文主要结合酒钢制氧的工艺特点,对DCS自控系统和仪表控制系统进行简单的分析。

简介：对KDON-35000/40600型制氧机组经济运行作了阐述,提高有效能的利用率,降低氧气放散率,从而实现降本增效。

简介：本文从酒钢3×6000Nm~3/h制氧生产工艺及其控制设备的现状出发,介绍了改造后DCS控制系统软、硬件的构成和实现的主要功能,取得了良好的应用效果。

简介：TheextractionofCe(Ⅳ)inH2SO4/H3PO4systemwasinvestigatedsystematicallyusingbifunctionalionicliquidextractants(Bif-ILES)[A336][P507],[A336][P204]and[A336][C272]inn-heptane.TheeffectsofH2SO4concentration,extractantconcentrationandsalting-outagentconcentrationwereobservedindetail.TheextractionmechanismofCe(Ⅳ)inH2SO4/H3PO4systemwasobtained.ThecomparisonwithotherextractantssuchasCyanex923,TBPwasalsostudied.Thermodynamicfunctionsoftheextractionreactionwerecalculated,showingthattheextractionwasanexothermicprocess.TheseparationofCe(Ⅳ)fromRE(Ⅲ)andTh(Ⅳ)wasalsoinvestigated.TheresultindicatedthatCe(Ⅳ)couldbeselectivelyextractedinthissystem.CePO4nanoparticleswereobtainedintheprocessofstrippingusingH2O2inH2SO4/H3PO4system.X-raydiffraction(XRD),scanningelectronmicroscopy(SEM)andspectroscopywereadoptedforthecharacterizationofthesample.

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简介：氪、氙是空气中的稀有气体,由于具有一定的特性,使氪、氙应用前景广泛,空分中存在多种稀有气体,其中氪、氙含量最少,由于提取工艺复杂,价位高昂,俗称"黄金气体",空分中的氪、氙主要在液氧中,通常伴随产品氧气或液氧排出而被带走,随着空分设备日益大型化,提取氪、氙的原料气液氧产能增加,从液氧中提取氪、氙蕴藏着巨大经济前景。

简介：自86年底投产以来,6000m~3/h制氧机经历了六个运行周期,在它每个运行周期中都曾出现下塔压力和液空液位逐步升高,上塔阻力和主冷液面逐步下降,全开液空节流伐也无效,只好空压机部分放空减负荷生产氧气。同时提前切换再生液空吸附器,甚至几天内反复再生液空吸附器和反吹液空过冷器。在排放吸附器中废液时,可以在喷射蒸发

简介：Baosteel's60000m3/hairseparationunit(ASU),thefirstdomestically-integratedunitofitsclass,isamilestoneintheChineseairseparationindustry.Inthispaper,theprocesscharacteristicsoftheunitandtheapplicationoftheoriginaltechniquesareexpatiated.Somedifficultiesintheprocessdesign,theriskcontrol,thequalitycontrol,thecontrolsystemintegrationandthesystemcommissioningareanalyzedandappraised.Themodeoftheprojectintegrationandinnovation,thecooperationamongindustriesandtheuser-orientatedprojectmanagementmodeareintroduced.Finally,thesuccessfulexperiencesininnovationaresummarizedwiththefocusontheintegrationoftheproject.

简介：简介了KDON20000/30000内压缩制氧机组设备配置和空分流程,就该制氧机组在超高、超低负荷下运行时遇到的问题进行分析和总结,提出在极限负荷下操作运行的注意事项和采取的措施。

简介：针对20000m3/h制氧机组透平膨胀机在运行过程中出现的故障现象进行了分析,通过采取一系列的处理措施,膨胀机运行稳定,运行参数得到了改善。

简介：针对KDON-20000/20000型制氧机组的外压缩流程在空分临时停车后,启动过程中氩系统建立工况较慢,恢复时间较长的问题,通过对主塔和氩系统投运进行优化操作以缩短氩系统恢复时间,尽快生产出合格的液氩,不仅提高了空分机组临时停车后的应变保供能力,且创造了一定的经济效益。

简介：Thesinglecrystalofthecomplex[Sc（NO3）3（H2O）2]·（15C5）hasbeenpreparedinacetonitrile.Thenewcomplexhasbeencharacterizedbyelementalanalysis,IRspectra,solubilityandmolarconductancemeasurements.ThestructureofthecomplexisdeterminedbysinglecrystalX-raydiffractionanalysis.

简介：简介南钢30000m^3／h外压缩空分设备氩馏分的影响因素，并提出了氩馏分的调节方法。讲述了氩馏分抽取量对精馏工况的影响，总结出氩馏分抽取量调整的方案。分析氩馏分与氮塞的关系，简述氮塞发生的原因、调整手段及预防措施。

简介：10000m~3/h制氧机组粗氩净化系统特别是经除氧后的冷却脱水效果差,使得过冷器和精氩塔因带水发生堵塞,为此,我们对粗氩净化系统进行了多次改造,使运行状况有明显改善。

简介：四lanthanide协作建筑群，也就是[行(2,3-DClBA)3(5,5-dmebipy)(H2O)]2(Ln=Sm(1),Eu(2)，Dy(3)，惊讶(4))；2,3-DClBA=2,3-dichlorobenzoate；5,5-dmebipy=5,5-dmethylbipyridine)被元素的分析，红外线的光谱学和单个水晶X光检查衍射综合并且描绘。调查结果显示建筑群3是一个dinuclear分子，并且中心Dy3+是八坐标的。每个dinuclear单位能被H债券和卤素卤素相互作用连接。建筑群2的光性质建议了Eu3+离子的典型强烈排出物。热分析证明建筑群在三分解了步：协作水然后第一被失去中立ligand5,5dmebipy被失去，最后，2,3-DClBAligand被失去。

简介：介绍了35000m3/h制氧机组空分设备的工艺流程、技术参数,以及临时停车后再运行,空分工况快速恢复的有效措施。

简介：Baosteel'sNo.8airseparationunit(ASU)isthefirstdomestically-integrated60000m3/hASU.Thispaperdescribesthemechanicalequipment,thedesignandtheconfigurationcharacteristicsofthisunit.ThepotentialfailuremodesofthemechanicaldevicesarededucedviaanalysesonthefailurehistoryofsimilardevicesinotherASUs.Finally,thispaperalsobringsupsuggestionsondailymaintenance,overhaulandpurchasesofspareparts.

简介：(上接第三期)2．问：正常运行最高工作压力小于0．1MPa，但在使用中短时(如进、出物料时)承压的压力容器指哪些?如何理解“短时”?

简介：DirectextractionofmetalsfromsolidswithcomplexingagentsinsupercriticalCO2(SC-CO2)hasrecentlyattractedinterestsinseparation,purification,recovery,andanalysisofmetals.Inthepresentstudy,thestatic/dynamicextractionofrareearthelements(Nd,Ce)fromtheiroxides(Nd2O3,CeO2)withorganophosphoruscomplexeswithHNO3andH2OinSC-CO2wasinvestigated.ThestaticextractionefficiencyofNdfromNd2O3withthetri-n-butylphosphate(TBP)-HNO3complexcouldreach95%underoptimizedexperiment...

简介：ThephaseandmorphologytransformationduringthehydrothermaltreatingprocessofY2O3wasevaluatedwithX-raydiffcrcnce(XRD),scanningelectronmicroscopy(SEM),transmissionelectronmicroscopy(TEM),particlesizeandspecificsurfaceareadetermination.TheresultsshowedthatthecubicY2O3didnottransferintohexagonalY(OH)3inpurewater.Therefore,purehexagonalY(OH)3withnanotubeandmicrorodmorphologieswereobtainedbyhydrothermaltreatingY2O3at150℃for12hin15mlof2mol/LNaOHsolutionwithandwith-outPVAorPEGItwassuggestedthatthecharacteristicpreferentialgrowthofY(OH)3wasattributedtothestructureanisotropyofhexahedronY(OH)3.TheadditionofPVAorPEGcouldpromotetheformingprocessofnanotubesbyselectiveadsorptionondifferentcrystalplanes,whichalteredthegrowthratealongdifferentdirectionsandresultedinthediffusionlimitofconstructingionsinthecentertopofrods.Finally,Y(OH)3:EuandY2O3:Eunanotubeswerealsosynthesizedbyusingthismethod,andtheirphotoluminescencepropertieswereevaluated.