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1、第8卷第3期環(huán)境工程學(xué)報(bào)Vol．8，No．32014年3月ChineseJournalofEnvironmentalEngineeringMar．2014多水源供水管網(wǎng)中鐵釋放規(guī)律11*1122黃廷林戴雪峰王旭冕尚修竹韓宏大何文杰(1．西安建筑科技大學(xué)環(huán)境與市政工程學(xué)院，西安710055;2．天津市自來水集團(tuán)有限公司，天津300040)摘要針對(duì)水源切換而引起的水質(zhì)超標(biāo)現(xiàn)象，開展了多水源聯(lián)合供水條件下管網(wǎng)中鐵釋放規(guī)律的研究。分析了北方某城市2種水源(灤河水和長(zhǎng)江水)的水質(zhì)特點(diǎn)，利用實(shí)驗(yàn)?zāi)M反應(yīng)器分別研究了水源完全置換和供水分界線處水源混2－合
2、區(qū)域的鐵釋放規(guī)律。結(jié)果表明，多水源供水管網(wǎng)的鐵釋放速率與水源水質(zhì)密切相關(guān)，特別是水中含高濃度SO4和氯化物時(shí)會(huì)加快鐵的釋放。不同水源之間的頻繁切換會(huì)破壞管垢表面的鈍化層，使鐵釋放速率迅速變化，隨后會(huì)有所緩解，但新的平衡的形成需要較長(zhǎng)時(shí)間。供水分界線處的水源混合區(qū)域，由于水質(zhì)的不斷變化造成管垢表面很難形成穩(wěn)定的鈍化層，鐵釋放速率持續(xù)偏高，只有當(dāng)長(zhǎng)江水所占比例高達(dá)75%以上時(shí)才能得到抑制。關(guān)鍵詞多水源水源切換供水分界線鐵釋放供水管網(wǎng)中圖分類號(hào)TU991文獻(xiàn)標(biāo)識(shí)碼A文章編號(hào)1673-9108(2014)03-0834-05Lawofironrel
3、easeinwatersupplynetworkwithmultiplewaterresources111122HuangTinglinDaiXuefengWangXumianShangXiuzhuHanHongdaHeWenjie(1．SchoolofEnvironmentalandMunicipalEngineering，Xi’anUniversityofArchitectureandTechnology，Xi’an710055，China;2．TianjinWaterworksGroupCo.Ltd.，Tianjin300040，Ch
4、ina)AbstractThephenomenonthatwaterqualitydoesnotreachthestandardalwaysoccurafterthewatersourceisswitched，theresearchoftheironreleaselawinwatersupplynetworkwithmultiplewaterresourceswascarriedout.Waterqualitycharacteristicsofbothwaterresources(theLuanＲiverwaterandtheYangtze
5、Ｒiverwater)ofanortherncitywereanalyzed，andironreleaseinthezoneofwatercompletelyreplacementandwatersupplydividinglinewereresearchedrespectivelybytheexperimentalreactor.Theresultshowsthattheironre-2－leaserateiscloselyrelatedtothewaterquality.Especiallywhenthewatercontainshig
6、hconcentrationofSO4andchloride，theironreleaseratewillspeedup.Thefrequentswitchingbetweenthedifferentwaterresourceswilldestroythepassivationlayeronthesurfaceofthepipescale，theironreleaseratewillrapidlychange，andthenwillbeeased，butitrequiresalongertimetotheformationofanewequ
7、ilibrium.Tothemixedwaterindi-vidingline，itisdifficulttoformthestablepassivationlayerbecauseofthewaterqualitychangesconstantly，thecontinuedhighrateofironreleaseoccurs.ItcanbesuppressedonlywhentheproportionoftheYangtzeＲiverwaterisashighas75%ormore.Keywordsmultiplewaterresour
8、ces;watersourceswitching;watersupplydividingline;ironrelease;watersupplynetwork［4-9］城市飲用水
