EDI水处理技术在上都电厂4600MW机组中的应用孙所清

101　　EDI4×600MW孙所清,张新凯,李　佩华能上都发电有限责任公司,内蒙古正蓝旗　027200[　　　]　上都发电有限责任公司采用全膜水处理技术(盘式过滤器+超滤+二级反渗透+EDI)制备锅炉补给水。重点介绍EDI装置运行中遇到的问题及对策。运行结果表明,全膜水处理工艺运行可靠,管理简便,产水水质能满足锅炉用水要求。此外,采用全膜水处理技术彻底消除了传统混床树脂再生系统使用的酸碱和废水的排放。[　　]　水处理;全膜法;电去离子(EDI);除盐;水质[]　TM621.8[]　B[]　1002-3364(2010)02-0101-03[DOI]　10.3969/j.issn.1002-3364.2010.02.101APPLICATIONOFEDIWATERTREATMENTTECHNOLOGYONTO4×600MWUNITSINSHANGDUPOWERPLANTSUNSuo-qing,ZHANGXin-kai,LIPeiHuanengShangduPowerGenerationCoLtd,Zhenglanqi027200,InnerMongolianRejion,PRCAbstract:Thepreparationofmake-upwaterforboilersinShangduPowerGenerationCoLtdbyusingtotalmembranewatertreatmenttechnology,i.e.disctypefilter+ultrafiltration+two-stagereverseosmosis+electrodeionization(EDI)hasbeenpresented,theproblemsencountedinoperationofEDIfacilityandcountermeasuresadoptedbeingemphaticallygiven.Resultsofpracticaloperationshowthatthetotalmembranewatertreatmenttechnologyisreliableinoperation,beingsimpleandconvenientinmanagement,thequalityofeffluentwatercansatisfyrequirementsofwaterusedforboilers.Inaddi-tion,byusingthetotalmembranewatertreatmenttechnology,theacidandalkaliusedinregenerationsystemfortraditionalmixedbedresin,aswellasthedischargeofwastewaterhavebeenthoroughlye-liminated.Keywords:totalmembranemethod;EDI;desalting;waterquality:　(1973-),,,,,。E-mail:[e-mail]1　EDIEDI、,/,1。,,102　　H+OH-,、、。1　EDI()EDI,。EDI。2　EDI,291.1μS/cm;pH8.10;HCO-3157.21mg/L;SO2-48.58mg/L;Cl-5.62mg/L;NO-30.4mg/L;SiO20.92mg/L;CODCr10mg/L。:※※()※(RO)※(NaOH)RO※RO※EDI※。2006720074,RO(RO)、EDI(EDI)EDI2～4。3EDI0。3　(1)原水温度　,EDI;,,。,,(25±2)℃,。(2)水回收率　,EDIEDI。,,,,,,;,,。,,。:(250±30)μS/cm,(2.5±0.2)t/h(EDI60t/h),,。　2　3(、)RO　　　3　3EDI　　　4　3EDI103　　　　(3)EDI进水水质　EDI,。,,。,,,,H+OH-,、,。EDIRO,,1.4～1.6μS/cm。(4)操作电流　,EDI。,,H+、OH-,,EDI;,,,;,,H+、OH-,,,EDI。,。(45±5)A,3A。(5)操作电压　。,,H+、OH-,,,HOH,。(120±20)V。(6)进水CO2含量　ROCO2(CO2≤5mg/L),EDI。RO,HCO-3RO,RO。(7)进水有机物　EDI、,,,。(TOC)EDI,EDI。、RO,、EDI,EDI,()。(8)进水余氯　EDI,EDI,,、,,。1EDI,45%;,。EDI0.05mg/L,RO(ORP),5EDI。3　(1)EDIRO,,。1,16MΨ·cm,5μg/L,。(2)EDI,(、),,,。(3)EDI,,EDI,。(4)EDI30,,,。[　　　][1]　GanziGC.ElectrodeionizationforHigh-PurityWaterProduction[C].AIChESymposiumseries,number261,Volume84,1998.[2]　GCGanzi.[M]..:,1993:260.[3]　,.[J].,1996,22(6):336-341.[4]　.[J].,1998,38(7):107-110.