高浓度含盐化工废水蒸发脱盐回收处理的试验研究

22420098POLLUTIONCONTROLTECHNOLOGYVol.22,No.4Aug.,20091,　　2,　　3(1.张家港市格锐环境工程有限公司,江苏张家港　215600;　2.张家港市环境监测站,江苏张家港　215600;　3.张家港市环境监察大队,江苏张家港　215600)　:,,,,,0.75t。CODCr95%,,,、。:;;;:X703.1;X505　　　:ATestStudyontheTreatmentandRecoveryofChemicalWastewaterwithHighSalinitybyEvaporationZHENGXian-zhu1,　DAIYan2,　XIEMin3(1.ZhangjiagangGreenEnvironmentalEngineeringCo.,Ltd.Zhangjiagang,Jiangsu215600,China;2.ZhangjiagangEnvironmentalMonitoringStation,Zhangjiagang,Jiangsu215600,China;3.ZhangjiagangEnvironmentalMonitoringUnit,Zhangjiagang,Jiangsu215600,China)Abstract:Asmall-scaletestwascarriedouttotreatthechemicalwastewaterwithhighsalinitybytwo-stepevaporation.Thetestindicatedthattheremovaleffectwasobviouslywhichwasdealedwithtwo-stepevaporation,thesecond-timesteamwasre-utilized,thecostwasreduced,and0.75tonofsteamwasusedtoevaporatepertonaveragely.TheremoverateofCODCrinwastewaterreached95%,anddifferentkindsofsaltsinwastewatercanbereclaimedabsolutelybyadoptingtwostepevaporationcrystallizationcraft,whichwillrealizethepurposeofchangingwasteintovaluableaswellasrecyclingresource.Keywords:wastewaterofhighsalinity;evaporateconcentrate;salt;Na-Glycolate:2009-04-21:(1972—),,,,,。1　　,(CMC)。CMC,、,、、。CMC,,,CMC,(),30%,COD70000mg/L,,。CMC,,[1,2]。,630/t,98%2～3/t,,。,,,,,。[3],,·6　　　　·.224,,。,,,,。,[4]。,,,,、,。2　2.1　实验设计,;pH,,,,NaCl。,。NaCl,,。2.2　实验装置、、、、、、。。,、、、、[5]。、,。,“”--,,-。,。,,,,。,,、,,,。2.3　废水水质特点COD,CMC,30%,,COD70000mg/L,。1。1　　　1CODCr/(mg·L-1)55000～700002pH5～63NaCl/%16～204/%6～105/(mg·L-1)300～7502.4　工艺流程1。1　2.5　工艺流程简介,。。,,NaCl,;,。,,。。,,20098.·7　　　　·,,pH。2.6　中试参数(1):50kg/h;(2):50kg/h,Ⅰ,;Ⅱ,,,,;(3):SK-4,2.2kW;(4):YE-3-16,1.1kW;(5):Y100L-6,1.5kW;(6):YS7124,370W;(7):7.5kW();(8):,2.0m3/h。3　3.1　设备连续运行的平顺性测试,。,,,,,,,,,2。2　　1/h72/kg11153COD/(mg·L-1)568004pH5.55pH8.561COD/(mg·L-1)185072COD/(mg·L-1)22508pH8.252,,,,COD,,。3.2　第一次蒸发中试(氯化钠盐回收),,。,,,CMC。3。3　　1COD/(mg·L-1)621012NaCl/%18.43/(kg·L-1)1.194pH5.85pH8.561COD/(mg·L-1)165072COD/(mg·L-1)188583COD/(mg·L-1)183294COD/(mg·L-1)127010pH8.3511/%8212NaCl/%89.8413(/)/(kg·kg-1)0.723,COD,。,,85%,,,,,,。,88℃,-0.06MPa,63℃,-0.088MPa。1kg0.72kg,,。3.3　第二次蒸发浓缩中试(混合液浓缩),,,,。。4。4　　1NaCl/%14.11/%46.52/(kg·L-1)1.353pH9.541COD/(kg·L-1)81952COD/(kg·L-1)75063COD/(kg·L-1)58474COD/(kg·L-1)4178pH8.199/%6010(/)/(kg·kg-1)0.80,,(下转第127页)20098.·127　　·3　//1/t43002199417002/kW·h3878000.562171683TT-2/t78820639604TT-235/t3645301630805/1296006/5400007/2769008/09/t2550002.1554825010/t6874650446810073487582、3,,74.5t、30,,125.2。　　(2)　,815000t,COD65.2t。。(3)　,,、、。,,“,”,。5　　CPE,,(,),,,。(上接第7页)。4,COD,,,。,,,,,。,,。3.4　其它,,。,,,,COD。,,,。,、,,,,,。,,,。4　　(1),。,,,。1t0.75t。(2),,,COD2000mg/L,,。,89%,82%。,,60%,,,。(3),,,。(4),pH(8.5),,。(5),,,。(6),,,。[][1]　.[M].[s.1.]:[s.n.],1998.[2]　.[M].[s.1.]:[s.n.],2007.[3]　.[M].[s.1.]:[s.n.],2001.[4]　.[J].,2003.9:216-217.[5]　.[J].,1999,32(6):16-18.