精馏塔底部液位控制不准的原因及改进

355Vol.35,No.520065LiaoningChemicalIndustryMay,2006(,110021):,;,,,,,:;;:TQ056.1+4:A:10040935(2006)05028202,,,,,,,,,,,,11,1,,,,,;,,,,,2,,,80%,,,3s,,1min,,,::2006201212:(1965-),,;,;,;,,;PID,;,,,,:,,,,,,,,,,,,3,:,,,,,1000mm,,,,,,224,,,,,,,8%,[1]..,2000.1:3[2]..,1993.10:2Reason&ImprovementofInaccruacyofLevelControlintheBottomofRectifyingTowerGUMing(DesigningInstituteofShenyangResearchInstituteofChemicalIndustry,Shenyang,110021,China)Abstract:Thelevelchangeisveryviolentinthebottomofrectificationtower.Mainreasonisthatthefixsiteoffloatistooclosetoexitandfewclapboardleadtothefallingmediumstrikethefloatcontinually.Atthesametime,becausemediumisnotblockedduringfalling,thefoamisformedabovethelevel.Theseareallleadtothefloattomakemiscarriagesignal.Keywords:Floatlevelcontrol;Fixsite;Pumpatthebottomoftower382355: