高盐废水分盐结晶工艺及其技术经济分析熊日华

469Vol.46No.920189CoalScienceandTechnologySep．20181212121211．1022112．1000112。－30%37．81000/t30%。X703A0253－2336201809－0037－07Processintroductionandtechno－economicanalysisonpuresaltrecoverycrystallizationforhighsalinitywastewaterXIONGＲihua12HECan12MAＲui12LIUJie12LIUZhaofeng11．NationalInstituteofClean－and－Low－CarbonEnergyBeijing102211China2．StateKeyLaboratoryofWaterＲesourceProtectionandUtilizationinCoalMiningBeijing100011ChinaAbstractItisofgreatimportancetoprovideoptimalpuresaltrecoverycrystallizationprocessdesignsandmaximizerecoveryofpuresaltsatthelowestcostwhileachievingzeroliquiddischargeforthehighsalinitywastewateratcoalchemicalandotherindustries．Inthispapervarioustypicalpuresaltrecoverycrystallizationprocessesforhighsalinitywastewaterweredescribedanddiscussed．Exemplarypuresaltre-coveryprocessdesignswerethenprovidedanddiscussedwithahighsalinitycoalchemicalwastewaterasthefeedstream．Quantitativetech-no－economicanalysiswasfurtherperformedforthethermalandthemembrane－basedpuresaltrecoverycrystallizationprocesses．There-sultsindicatethatthemembrane－basedprocessshows30%highercapitalcostbutsaves30%operationcostasaresultof37．8higherper-centagerecoveryrateofpuresalts．Itisconcludedthatthemembrane－basedprocessisabettersolutioninthiscaseespeciallywhenthedisposalcostofthemixedsaltwasteishigh．Keywordshighsalinitywastewaterzeroliquiddischargepuresaltrecoverycrystallizationnanofiltrationlowtemperaturecrystallization2018－06－08DOI10.13199/j.cnki.cst.2018.09.006GJNY－18－711978—。[e-mail]chno－economicanalysisonpuresaltrecoverycrystallizationforhighsalinitywastewaterJ.CoalScienceandTechnology201846937－43.0。、。3000～50000mg/L。1－2。。。、、、7320189463－56－7。2015《》、、。、、18－9。10－12。。。。2017《“”》。。13－1516－18。2。1。。2。1．1、。1．1．1。1。1Fig．1FlowchartofdirectevaporationcrystallizationprocessⅠ。Ⅱ。。、。19。1．1．2。2。2Fig．2FlowchartofNaCl－Na2SO4co－productioncrystallizationprocess8320189。50～120℃20。I。ⅠⅡ。Ⅰ。。。。。。50～120℃60℃100℃45．3g42．5g－6．2%37．3g39．8g6．7%。。1．1．30～30℃。。30℃40．8g20℃19．5g10℃9．1g0℃4．9g。。30℃0℃36．3g35．7g。。。3。3Fig．3Flowchartofcombinedhighandlowtemperaturecrystallizationprocess。。。1．2。。1．2．1。。。95%。。4。7%0℃93201894621。。。4－Fig．4Flowchartofcombinednanofiltrationandlowtemperaturecrystallizationprocess－。。。1．2．2。5。。。。5Fig．5Schematicworkingprincipleonelectrodialysisbasedsaltseparationprocess。。。。。230m3/h14000mg/L42000mg/L。4000mg/L、。。2．114000mg/L42000mg/L6。6Fig．6Flowchartdesignandmassbalancewiththermalsaltrecoverycrystallizationprocess50%。15m3/hⅠ104～107℃800kg/h。I88%1．4m3/h23%。ⅠⅡ82～86℃1000kg/h。042018944．4%。2．2－7。7Fig．7Flowchartdesignandmassbalancewithmembranebasedsaltrecoverycrystallizationprocess。8．5%0℃2560kg/h。2．6m3/hⅡ。98%。75%。6．5m3/hⅠ350kg/hⅡ320kg/h。82．2%。3、。、、、。。2．12．22。3．1。2。3．1．11。。。293%～96%。99%。98%～99%。3。。。3．1．22．163．5%44．4%。。。2．214201894689．6%83．3%82．2%。。3．21。26721。12Table1Estimationofcapitalcostwithtwodifferentsaltrecoverycrystallizationprocesses/200200030015006000100030050020002600130%。。。。2。、。。6722。29．719．4。1000/t43．030．1。30%。22Table2Estimationofoperationcostwithtwodifferentsaltrecoverycrystallizationprocesses/·t－12．02．602．66．89．103．20．91．933．310．743．030．16008000h3101．9。3000/t14000．4。4。。。30m3/h－282．2%44．4%。30%1000/t242018930%。3000/t0．4。Ｒeferences1SEMBLANTEGalileeUyLEEJounathanZhiqiangLEELaiYokeetal．Brinepre－treatmenttechnologiesforzeroliquiddis-chargesystemsJ．Desalination201844196－111．2XIONGＲihuaWEIChang．CurrentstatusandtechnologytrendsofzeroliquiddischargeatcoalchemicalindustryinChinaJ．JournalofWaterProcessEngineering201719346－351．3XIEKechangLIWenyingZHAOWei．CoalchemicalindustryanditssustainabledevelopmentinChinaJ．Energy2010354349－4355．4．J．2011362179－184．ZHANGYuzhuo．ConstructionandoperationofShenhua’smoderncoal－to－liquidandchemicalsdemonstrationprojectsJ．JournalofChinaCoalSociety2011362179－184．5．J．2016444189－195．LIUYanliLIUGe．Analysisanddiscussiononhighwatercon-sumptionproblemofcoalchemicalindustryJ．CoalScienceandTechnology2016444189－195．6．J．201442745－47．TONGLiZHOUXueshuangDUANFeizhouetal．Analysisandcoun-termeasuresonenvironmentalrisksofChina’smoderncoalchemicalindustryJ．EnvironmentProtection201442745－47．7．J．20173925－8．LIANGＲuiLIJiwenLYUWeietal．EnvironmentalpermitanddevelopmentsuggestionsofmoderncoalchemicalindustryinChinaJ．EnvironmentalImpactAssessment20173925－8．8TONGTiezhengELIMELECHMenachem．TheglobalriseofzeroliquiddischargeforwastewatermanagementdriverstechnologiesandfuturedirectionsJ．EnvironmentalScience＆Technology2016506846－6855．9．J．20174511205－210．MAOWeidongZHOUＲuluGUOZhongquan．ZeroliquiddischargetreatmenttechnologyandapplicationforcoalminedrainagewaterJ．CoalScienceandTechnology20174511205－210．10．J．201142570－75．WEIJiangbo．ZeroliquiddischargepracticeandexplorationoncoaltoliquidwastewaterJ．IndustrialWaterandWastewater201142570－75．11．“”J．201331218－24．QUFengchen．ThekeytechnologiesandproblemsofwastewaterzerodischargeincoalchemicalindustryJ．ChemicalIndustry201331218－24．12．J．2015431120－124．HEXuwenWANGChunrong．Zerodischargetechnologyandsolu-tionideaofwastewaterfromnewcoalchemi