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反渗透膜脱盐率下降过快的原因有哪些?

来源:/作者:admin/时间:2017-10-09
摘要:在脱盐水处理设备中,采用反渗透膜进行脱盐处理是目前最实用技术。反渗透设备运行中,经常发现反渗透纯水设备出现脱盐率下降过快的情况,那么脱盐率过快下降的原因有哪些..
导致反渗透膜脱盐率下降过快的原因?

1、高压差导致脱盐率下降

YACHASHENGGAOTONGSHIWANGWANGBANSUIZHETUOYANLVKUAISUXIAJIANG。ZAIZHENGCHANGDELIULIANGXIA,YACHADESHANGSHENGTONGCHANGSHIYOUYUMOYUANJIANSHUILIULIANGTONGDAODEGEWANGJINRUZAZHI,WURANWUZHIHESHUIGOUYINQIDE,DAOZHICHANSHUILIULIANGDEXIAJIANG。DANGCHAOGUOSHEDINGDEJISHUILIULIANGSHI,YEHUIFASHENGGUODADEYACHA,DANGQIDONGSHIJISHUIYALITISHENGGUOKUAI,FASHENGSHUICHUIYACHAHUIHENDA,RUGUOMOYIJINGBEIWURAN,TEBIESHIWEISHENGWUWURAN,YACHAYEHUIZENGDA。JISHUIZHINONGSHUIJIANDEYACHABIAOSHIDESHISHUILIZULI,YUJISHUIDELIUSU、WENDUYOUGUAN,YINGGAIBAOCHICHAN

SHUIHENONGSHUIYOUYIDINGDELIUSU。CHUXIANGAOYACHADEKENENGXINGYOU:SHUIGOU、WEISHENGWUWURAN、ZUGOUJICHENDIAN、GUOLVQIGUOLVJIEZHILOU、JISHUI/NONGSHUIMIFENGSUNHUAI。

2、在线化学清洗不合理导致脱盐率下降

CHAOCHUNSHUISHEBEIZAIYUNXINGZHONGSHIBUKEBIMIANBEIWURAN。YUCHULIHETIANJIAGEZHONGYAOZHONGYAOJIZHINENGJIANGFANSHENTOUBEIWURANDEKENENGXINGJIANGDAOZUIDI,ERBUNENGCHEDIDEDUJUE。YINCI,ZHANGQIYUNXINGDEFANSHENTOUXITONGZAIJINGGUOYIDINGSHIJIANDEYUNXINGHOU,BIXUYAOCHONGFENLUNZHENGHEQUERENSHINAYIZHONGWURANWU。ZHENDUIJUXIANANMODETEDIAN,KEYIGENJUXIANGYINGDEWUGOUXUANQUSHIDANGDEQINGXIJI:

a、YANSUAN(36%-38%),PEIZHICHENG0.12%XIRONGYE,QUCHUJINSHUYANGHUAWUZHI。

b、QINGYANGHUANA,PEIZHICHENG0.1%DEXIRONGYE,QUCHUERYANGHUAGUI、WEISHENGWUMO、YOUJIWUDENG,pHYUEWEI12。ZUOYONGSHIDUIYOUJIWEISHENGWUZHANMODESHUIJIEPOHUAIERBOLI,DUIYUERYANGHUAGUIJIAOTIGOU,XINGCHENGDEGUISUANNAWEIKERONGXING,CONGERCHUGOU。

c、YIERANSIYISUANSINA,ZUOWEIAOHEJIGUANGFANYINGYONGYUGONGYEQINGXI,1%SHUIRONGYEpH10.5-11.5,JIARUNONGDU0.5%-1%。

d、SHIERWANJIHUANGSUANNA,SHUYINLIZIBIAOMIANHUOXINGJI,MUDESHIFENSANZAIRONGYEZHONGDEYOUJIHUAHEWU,KESHIRONGYEDEBIAOMIANZHANGLIJIANGDI,YINQIZHENGXIFU,ZHEIYANGKESHIRONGYEBIAOMIANRONGZHIFENZIDEDENONGDUDAYURONGYENEIBURONGZHIFENZIDENONGDU。SHIERWANJIHUANGSUANNASHIFANSHENTOUQINGXISHIZUIZHUYAODEBIAOMIANHUOXINGJI,JIARUNONGDUWEI0.025%。

f、JIAQUAN,JIAQUANDUIXIJUN、ZHENJUN、BINGDU、YABAOJIYUANCHONGDENGJIEYOUJIQIANGDESHAMIELI,JIARUNONGDUWEI0.5%-35。

3、余氯的控制差导致脱盐率下降

CILVSUANNAZUOWEISHAJUNJI,GUANGFANYINGYONGYUCHUNSHUISHEBEIYUCHULIZHONG。ZAIFANSHENTOUXITONGZHONG,WEIFANGZHIFANSHENTOUDEWEISHENGWUWURAN,DUIFANSHENTOUJINSHUIYAOJINXINGLVHUACHULI。YONGBISEJICEDINGYULV,KONGZHIYULVDEZHILIANGNONGDUZAISHAGUOLVQIJINKOUCHUYIBANWEI0.5mg/L,BUXIAOYU0.3mg/L,ZAIFANSHENTOUQIANBAOANGUOLVQICHUYINGXIAOYU0.1mg/L。ERJUXIANANLEIMODETUCHUWENTISHIFANGZHIQIBEIYANGHUA。JINSHUIYULVZHIHEQIANGYANGHUAJUNDUIQIZAOCHENGBULIDEYINGXIANG,BIXUYANGEKONGZHI。YINERDINGQIJIANCEFANSHENTOUJINSHUIDEYULVZHIJIWEIZHONGYAO。

SUZHOUHUAMOHUANBAOKEJIYOUXIANGONGSI|SHUZHI、LVXIN、ZUGOUJI、CHAOLVMO、NALVMO、FANSHENTOUMO-SHUICHULIHAOCAICAIGOU/PIFA

DIZHI:JIANGSUSHENGKUNSHANSHIKAIFAQUQIANJINDONGLU287HAO509SHI。 LIANXIFANGSHI:185 5057 6906

YIZHANSHICAIGOUFUWU BANQUANSUOYOU@SUZHOUHUAMOHUANBAOKEJIYOUXIANGONGSI

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