一、氧化鋯氧量分析儀工作原理是什么
氧分析儀廣泛應用于電力、化工、鋼鐵等氧含量檢測,而煙氣中氧含量判斷是作為確定鍋爐系統中燃燒充分的依據,目前氧分析儀有磁氧分析儀、激光法氧分析儀、燃料電池法氧分析儀、氧化鋯氧量分析儀等(deng)。氧(yang)化(hua)(hua)鋯氧(yang)分析(xi)儀是目前主流,而目前應環保部門的要求(qiu),因(yin)燃(ran)料(liao)燃(ran)燒(shao)不(bu)充(chong)分產生SO2、NO2、CO等(deng)污(wu)染氣(qi)體,相關工廠企業已經強(qiang)制安裝氧(yang)量分析(xi)儀,氧(yang)化(hua)(hua)鋯氧(yang)量分析(xi)儀最為普及。
氧(yang)(yang)化(hua)(hua)鋯(gao)探頭(tou)由(you)鋯(gao)池(chi)、加(jia)熱(re)(re)元件(jian)、絕緣子、控制(zhi)熱(re)(re)電(dian)(dian)(dian)(dian)偶(ou)、過(guo)(guo)濾器(qi)、信號引線(xian)、高(gao)溫(wen)密封管(guan)等(deng)組成。氧(yang)(yang)化(hua)(hua)鋯(gao)鋯(gao)池(chi)是(shi)頂針(zhen)型(xing)感(gan)測(ce)元件(jian),在(zai)封閉端(duan)安裝有內電(dian)(dian)(dian)(dian)極(ji)(ji)(ji)(ji)和外(wai)電(dian)(dian)(dian)(dian)極(ji)(ji)(ji)(ji),內電(dian)(dian)(dian)(dian)極(ji)(ji)(ji)(ji)暴露(lu)在(zai)進入鋯(gao)池(chi)開(kai)口(kou)端(duan)的(de)(de)(de)(de)煙道(dao)氣(qi)(qi)(qi)體中,外(wai)電(dian)(dian)(dian)(dian)極(ji)(ji)(ji)(ji)處(chu)有通過(guo)(guo)泵(beng)供應參(can)比氣(qi)(qi)(qi)體因此處(chu)于(yu)氧(yang)(yang)氣(qi)(qi)(qi)含(han)量20.95%的(de)(de)(de)(de)恒定分(fen)(fen)壓(ya)(ya)下,鋯(gao)池(chi)溫(wen)度(du)由(you)加(jia)熱(re)(re)器(qi)及控制(zhi)熱(re)(re)電(dian)(dian)(dian)(dian)偶(ou)恒定保持為700℃。氧(yang)(yang)化(hua)(hua)鋯(gao)是(shi)一種當溫(wen)度(du)超過(guo)(guo)600℃時只傳導氧(yang)(yang)離子的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)解質(zhi),故(gu)而(er)鋯(gao)池(chi)電(dian)(dian)(dian)(dian)極(ji)(ji)(ji)(ji)輸出端(duan)之(zhi)間產(chan)生的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)動勢(shi)(shi)隨著(zhu)(zhu)參(can)比電(dian)(dian)(dian)(dian)極(ji)(ji)(ji)(ji)與策略電(dian)(dian)(dian)(dian)極(ji)(ji)(ji)(ji)之(zhi)間的(de)(de)(de)(de)氧(yang)(yang)分(fen)(fen)壓(ya)(ya)差比率以(yi)及氧(yang)(yang)化(hua)(hua)鋯(gao)溫(wen)度(du)的(de)(de)(de)(de)變(bian)化(hua)(hua)而(er)變(bian)化(hua)(hua)。依據能(neng)斯特方(fang)程(cheng),接觸煙道(dao)氣(qi)(qi)(qi)體的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)極(ji)(ji)(ji)(ji)會隨著(zhu)(zhu)煙氣(qi)(qi)(qi)的(de)(de)(de)(de)氧(yang)(yang)含(han)量影響氧(yang)(yang)分(fen)(fen)壓(ya)(ya)變(bian)化(hua)(hua)導致(zhi)鋯(gao)池(chi)輸出電(dian)(dian)(dian)(dian)動勢(shi)(shi)的(de)(de)(de)(de)變(bian)化(hua)(hua)。氧(yang)(yang)化(hua)(hua)鋯(gao)輸出電(dian)(dian)(dian)(dian)動勢(shi)(shi)隨著(zhu)(zhu)氧(yang)(yang)含(han)量的(de)(de)(de)(de)減小對數行(xing)地(di)增加(jia),從(cong)而(er)滿足低(di)氧(yang)(yang)含(han)量下具(ju)有高(gao)靈敏度(du)測(ce)試要求(qiu)。
二、氧化鋯氧量分析儀怎么標定
氧(yang)化鋯氧(yang)量分(fen)析儀標定方法如下(xia):
1、本底校驗:這個必須是(shi)在(zai)空(kong)氣(qi)(qi)中(zhong)校(xiao)驗,如(ru)果不是(shi)在(zai)空(kong)氣(qi)(qi)中(zhong),殘(can)(can)留氣(qi)(qi)體就降(jiang)低了標(biao)(biao)定的(de)參考值(zhi),不能達到空(kong)氣(qi)(qi)的(de)氧(yang)量值(zhi)。我(wo)們(men)擰下標(biao)(biao)氣(qi)(qi)口(kou),標(biao)(biao)氣(qi)(qi)口(kou)在(zai)氧(yang)化鋯探(tan)頭(tou)(tou)的(de)接線盒中(zhong),將(jiang)探(tan)頭(tou)(tou)放在(zai)空(kong)氣(qi)(qi)中(zhong),設置(zhi)(SET)菜單進入,根(gen)據說明書的(de)步驟,將(jiang)光標(biao)(biao)選(xuan)中(zhong)“本底自動校(xiao)驗”,等到氧(yang)量表顯(xian)示(shi)20.6左右(you)即(ji)可。由于是(shi)已經用過的(de)探(tan)頭(tou)(tou),內部(bu)肯定會有殘(can)(can)留的(de)氣(qi)(qi)體,所以顯(xian)示(shi)值(zhi)20.6左右(you)。
2、標氣自動校驗:同樣的是要擰下氧化鋯氧量分析儀(yi)標(biao)(biao)氣口,同樣的標(biao)(biao)氣口在(zai),氧化鋯探頭的接線(xian)盒(he)中,我們(men)(men)通入標(biao)(biao)氣,根據說(shuo)明書標(biao)(biao)定的步驟,選型“標(biao)(biao)氣自動校(xiao)驗“,在(zai)銷(xiao)售氧化鋯分(fen)析(xi)儀的同時,也(ye)有標(biao)(biao)氣提供,客戶可以選購使用。標(biao)(biao)氣通常有4L和8L的標(biao)(biao)氣。在(zai)標(biao)(biao)氣自動校(xiao)驗前,我們(men)(men)通常先進(jin)行本底校(xiao)驗,本底毫伏(fu)信(xin)號是否在(zai)0MV左右(you),越靠(kao)近0MV說(shuo)明越準(zhun),待(dai)穩定后,將濃(nong)度校(xiao)準(zhun)到空氣濃(nong)度。