500MVR蒸发含盐有机废水过程中沸点升高研究仲涛

StudyonBoilingPointElevationDuringEvaporationofSalt-containingOrganicWastewaterbyMVRZHONGTaoZHANGDong-yangSHENGuang-boXIAOHua-mingNIWei-hongXIAJiang-bing(ChangzhouGuanghuiBiotechnologyCo.Ltd.,JiangsuChangzhou213164China)Abstract:FeedliquidboilingpointelevationintheMVRsystemdesignisakeydatum.Theboilingpointelevationisdirectlyrelatedtocalculationofthesolid/liquidconcentrationdistributionandevaporatorheattransferarea.Inthispaper,boilingpointelevationduringevaporationofsalt-containingorganicwastewaterwasstudiedaswellasthechangeofboilingpointelevationatdifferentevaporatingtemperatureunderthesameconcentrationmultiple.Theresultsshowthat,theboilingpointelevationoftheliquidfeedevaporationincreaseswithgradualincreasingofthemultiple;andtheboilingpointelevationalsoincreaseswithincreasingoftheevaporatingtemperature.Keywords:Salt-containingorganicwastewater;MVRdesign;Boilingpointelevation;Evaporatingtemperature∆′=f∆a′:∆a′—;∆′—,;f—1:f=0.0162T′+2732/r′T′—,;r′—,kJ/kgTable1ThemaincomponentofsaltorganicwastewaterDOI:10.13840/j.cnki.cn21-1457/tq.2016.06.008Table2Majorequipments×Fig.1MVRevaporationprocessflowdiagramFig.3RelationshipbetweenevaporationtemperatureandboilingpointelevationmmFig.2RelationshipbetweenPVandblockingrateofreverseinjectionvolume