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1、氢电导率Hydrogenconductivity1.氢电导率,就是将检测水样先通过一个阳离子交换柱,水样中的阳离子被离子交换树脂中的氢交换,通过交换柱的水样留有阴离子和交换下来的氢离子,然后测定电导率。1.Hydrogenconductivityistestingthewaterthroughacationexchangecolumn,thecationsinwaterareionexchangeresininthehydrogenexchange,throughthecolumnofwaterexchangewithanionand
2、exchangedownhydrogenions,andthentheelectricalconductivitywasmeasured.2.氢电导率抑制了氨对水汽品质检测的影响，电厂热力系统中为了防止金属腐蚀,普遍采用给水加氨处理。氨是挥发性物质,除了与碳酸反应消耗一部分外也基本上留在热力系统循环,系统中氨含量大约在１～３mg/Ｌ。而在机组正常运行时,在除盐水、凝结水、蒸汽中的其他杂质成份含量也基本上是微克级,这毫克级的氨造成普通电导率检测不能反映其他杂质成份,所以通过阳离子交换柱将铵根除去后,检测电导率就能准确反映水汽中阴离子的含
3、量。2.Hydrogenconductivitysuppresstheeffectsofammoniaonthesteamqualitytesting,andplantsysteminordertopreventmetalcorrosion,commonlyusedwaterplusammonia.Ammoniaisavolatilesubstance,inadditiontopartoftheoutercarbonatereactionconsumesbasicallystayintheloopthermodynamicsystem
4、,thesystemammoniacontentofabout1~3mg/Ｌ.Whileinthenormaloperationoftheunit.Ininsaltwater,condensedwaterandsteamintheotherimpuritiescontentisbasicallymicrogramlevel,themgammoniacausedbyordinaryconductivitydetectiondoesnotreflectotherimpurityelements,sobycationexchangecolu
5、mnammoniumafterremoval,conductivitytestcanaccuratelyreflectthecontentofanionsinwatervapor.3.氢电导率能准确反映凝汽器泄漏。例如:以海水作为凝汽器冷却水的某机组,凝汽器发生微量的短时的泄漏,其他在线仪表还没有反映,而氢电导已经有明显的变化。3.Hydrogenconductivitycanaccuratelyreflectthecondenserleak.Forexample:toseawaterascoolingwaterinacondense
6、runit,condenserleaksmallamountsofshort-termoccurrence,otheronlinemeterhasnotbeenreflected,whilethehydrogenconductivityhavebeensignificantchanges.4.电厂要重视氢导电率表的作用，根据氢电导率的大小变化,进行水汽控制,是目前最直接、简便、有效的检测手段。它能及时、准确地反映水汽质量的变化,能灵敏地告诉运行人员水质变化,并通过对导电度数据变化规律的分析,可以寻找水汽质量变化的原因。4.Powers
7、houldpayattentiontotheroleofhydrogenconductivitymeter,accordingtothehydrogenconductivitychangeinsize,werevaporcontrol,itisthemostdirect,simple,effectivemeansofdetection.Itcantimelyandaccuratelyreflectthequalityofthewatervaporchanges,cansensitivelytelloperatingpersonnelc
8、hangesinwaterquality,andbyanalyzingthevariationoftheconductivityofthedata,youcanfindthereasonsvaporqualitychan
