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1、石油化工2010年第39卷第1期PETROCHEMICALTECHN0L0GY·61·振動(dòng)規(guī)整填料萃取塔的性能測(cè)定吳少敏,胡雪沁,侯貴軍,劉春江(化學(xué)工程聯(lián)合國(guó)家重點(diǎn)實(shí)驗(yàn)室天津大學(xué)化工學(xué)院,天津300072)[摘要]采用磷酸三丁酯一煤油一醋酸一水物系測(cè)試了振動(dòng)規(guī)整填料萃取塔的傳質(zhì)性能??疾炝艘?guī)整填料的安裝方式、連續(xù)相和分散相流速對(duì)分散相存留分?jǐn)?shù)和傳質(zhì)效率的影響。實(shí)驗(yàn)結(jié)果表明,在不分段、分段I(盤(pán)問(wèn)距50mil1)和分段Ⅱ(盤(pán)間距100iYln1)這3種規(guī)整填料安裝方式中,綜合考慮分散相存留分?jǐn)?shù)和傳質(zhì)效率,分段I比較具有優(yōu)勢(shì);當(dāng)兩相流速都較小時(shí),振動(dòng)規(guī)整填料萃取塔的分散相存留分?jǐn)?shù)比振動(dòng)篩板
2、萃取塔平均高30%左右;在相同的操作條件下,振動(dòng)規(guī)整填料萃取塔的表觀傳質(zhì)單元高度比振動(dòng)篩板萃取塔平均低18%左右。[關(guān)鍵詞]振動(dòng)規(guī)整填料萃取塔;液液萃取;規(guī)整填料;分散相存留分?jǐn)?shù);表觀傳質(zhì)單元高度[文章編號(hào)]1000—8144(2010)O1—0061—05[中圖分類(lèi)號(hào)]TQ053.5[文獻(xiàn)標(biāo)識(shí)碼]APerformanceMeasurementofReciprocatingStructuredPackingExtractionColumnWuShaomin,HuXueqin,HouGuijun,LiuChunjiang(StateKeyLaboratoryofChemicalEngine
3、ering,SchoolofChemicalEngineering,TianjinUniversity,Tianjin300072,China)[Abstract]Masstransfereficiencyofreciprocatingstructuredpackingextractioncolumnwasmeasuredbytributylphosphate—kerosene—aceticacid—watersystem.Influencesofpackinginstallationmodeandflowratesofbothdispersedphaseandcontinuouspha
4、seonholdupofthedispersedphaseandmasstransfereficiencyofthecolumnwereinvestigated.Amongthethreepackinginstallationmodes,namelynon—segmented,segmentedI(spacebetweentwopackings50mm)andsegmented1I(spacebetweentwopackings100n3rn),installationmodeofsegmented1wasthebestintheperformanceconsideringbothdis
5、persedphaseholdupandmasstransfereficiency.Whenthebothphaseflowratesweresmall,dispersedphaseholdupofreciprocatingstructuredpackingextractioncolumnwas30%higherthanthatofreciprocatingsieveplateextractioncolumn.Underthesameoperatingconditions,apparentheightofmasstransferunitofreciprocatingstructuredp
6、ackingextractioncolumnwas18%lowerthanthatofreciprocatingsieveplateextractioncolumn.[Keywords]reciprocatingstructuredpackingextractioncolumn;liquid—liquidextraction;structuredpacking;dispersedphaseholdup;apparentheightofmasstransferunit液液萃取過(guò)程在石化、冶金和制藥等領(lǐng)域有著雜,分散相難以破碎,對(duì)傳質(zhì)不利。因此常常通過(guò)廣泛的應(yīng)用。液液萃取過(guò)程中,液液兩相的宏
7、觀流引入外加能量來(lái)促進(jìn)液滴的分散,改善兩相流動(dòng)動(dòng)、液滴的破碎和聚并、液液界面的湍動(dòng)等不同尺狀況,提高傳質(zhì)效率J。常見(jiàn)的引入外加能量的度的傳遞行為,對(duì)液液萃取效率有重要的影響,深萃取設(shè)備主要有脈沖塔、往復(fù)振動(dòng)篩板塔和轉(zhuǎn)盤(pán)萃入研究不同尺度的傳遞現(xiàn)象對(duì)開(kāi)發(fā)新型萃取設(shè)備取塔。有非常重要的作用¨。唐曉津等指出分散一聚集篩板分布方式比目前工業(yè)上常用的液液萃取設(shè)備主要有混合標(biāo)準(zhǔn)篩板分布方式的傳質(zhì)效率高30%以上。胡競(jìng)澄清槽、填料萃取塔、篩板萃取塔