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1、河北工業(yè)大學(xué)碩士學(xué)位論文板上充氣狀態(tài)下立體傳質(zhì)塔板CTST的液體提升量研究姓名:劉長江申請學(xué)位級別:碩士專業(yè):化學(xué)工程指導(dǎo)教師:李春利20070301河北工業(yè)大學(xué)碩士學(xué)位論文板上充氣狀態(tài)下立體傳質(zhì)塔板CTST的液體提升量研究摘要以空氣—5%碳酸鉀溶液為實驗物系,測定了板上充氣狀態(tài)下立體傳質(zhì)塔板CTST的濕板壓降和單罩液體提升量的變化情況,考察了清液層高度、板孔動能因子、板上氣含率、底隙高度和板孔寬度等因素的影響;在能量守恒的基礎(chǔ)上建立了立體傳質(zhì)塔板CTST的單罩相對液體提升量的數(shù)學(xué)模型。在對濕板壓降的實驗研究中發(fā)現(xiàn):在板上
2、充氣狀態(tài)下濕板壓降隨著F0因子的增大、清液層高度的增加而增大;隨氣含率增大而減小。通過向板上液層中鼓氣來模擬板上充氣狀態(tài)測定了不同板上氣含率時立體傳質(zhì)塔板CTST液體相對提升量的變化情況,實驗結(jié)果表明在板上充氣狀態(tài)下相對提升量隨著板上液相氣含率的增加而降低,但變化不顯著;在板上氣含率相同時相對提升量隨著板上清液層高度的增加、板孔動能因子的減小而增加;相對提升量隨板孔寬度的變窄而增加,隨罩體底隙的增加先增加后降低。根據(jù)氣液兩相的接觸狀況,在能量守恒定律的基礎(chǔ)上對CTST的單罩液體提升量模型進行了推導(dǎo),并用實驗數(shù)據(jù)進行了驗證,
3、結(jié)果表明該模型能很好的反映CTST液體相對提升量的變化規(guī)律。關(guān)鍵詞:CTST,液體提升量,充氣狀態(tài),清液層高度,板孔動能因子i板上充氣狀態(tài)下立體傳質(zhì)塔板CTST的液體提升量研究STUDYONLIQUIDLIFTINGOFCTSTINSTATEOFGAS-FILLINGINLIQUIDLAYERABSTRACTTheair-5%K2CO3solutionsystemwaschosenastheexperimentalsystem,andthewettraypressuredropandtherelativeliquidlif
4、t-upofsinglecoverofCTSTweremeasuredinthestateofgas-fillinginliquidlayer.Theeffectofhightofclearliquidlayer,F0-factorbasedontrayhole,voidfraction,hightofgapbetweencoverandplate,andwidthoftrayholewereconsidered.Themathematicmodeloflift-upwasestablished.Thewettraypre
5、ssuredropwasmeasuredanditwasshowedthatthepressuredropincreasedwithclearliquidlayerandF0-factorbasedontrayhole,decreasedwiththevoidfractioninthestateofgas-fillinginliquidlayer.Thestateofgas-fillingofliquidlayerwassimulatedbyblowingtheairtotheliquidoftray,andtherela
6、tiveliquidlift-upofsinglecoverwasmeasuredindifferentvoidfraction.Theresultsshowed:therelativeliquidlift-updecreasedslimlywiththegrowthofvoidfractioninthestateofgas-fillingofliquidlayer,andtheliquidlift-upincreasedwiththeincreaseofheightofclearliquidlayerandthedecr
7、easeofF0-factorbasedontrayholeinthesamevoidfraction.Atthesameconditiontheliquidlift-upincreasedandthendecreasedwiththeincreaseofthecoverbottom,andincreasedwhenthewidthoftrayholebecamenarrow.Onthebasisofconversationofenergythemathematicmodeloflift-upwasestablished,
8、whichcandescribetheexperimentaldata.KEYWORDS:CTST(CombinedTrapezoidSprayTray),relativeliquidlift-up,voidfraction,clearliquidlayer,F0-factorii河北工業(yè)大學(xué)碩士學(xué)位論