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。氧(yang)(yang)化鋯(gao)氧(yang)(yang)分(fen)(fen)析(xi)(xi)儀是目前(qian)(qian)主流，而(er)目前(qian)(qian)應環(huan)保部門的要求，因燃(ran)料燃(ran)燒不(bu)充分(fen)(fen)產生SO2、NO2、CO等污染氣體(ti)，相關工廠企業已經強制安裝氧(yang)(yang)量(liang)(liang)分(fen)(fen)析(xi)(xi)儀，氧(yang)(yang)化鋯(gao)氧(yang)(yang)量(liang)(liang)分(fen)(fen)析(xi)(xi)儀最(zui)為普及。

氧(yang)(yang)化(hua)(hua)(hua)(hua)鋯(gao)探頭由鋯(gao)池、加熱元件、絕(jue)緣子、控制熱電(dian)(dian)(dian)(dian)(dian)偶、過濾器、信號引(yin)線(xian)、高溫(wen)(wen)密封管等(deng)組成。氧(yang)(yang)化(hua)(hua)(hua)(hua)鋯(gao)鋯(gao)池是(shi)頂針型感測元件，在封閉端安裝(zhuang)有(you)內(nei)電(dian)(dian)(dian)(dian)(dian)極和(he)外電(dian)(dian)(dian)(dian)(dian)極，內(nei)電(dian)(dian)(dian)(dian)(dian)極暴露在進入鋯(gao)池開口端的煙道氣(qi)(qi)體中(zhong)，外電(dian)(dian)(dian)(dian)(dian)極處有(you)通過泵(beng)供應(ying)參比(bi)氣(qi)(qi)體因此處于氧(yang)(yang)氣(qi)(qi)含(han)量(liang)(liang)20.95%的恒(heng)定分(fen)壓下，鋯(gao)池溫(wen)(wen)度(du)由加熱器及控制熱電(dian)(dian)(dian)(dian)(dian)偶恒(heng)定保(bao)持為700℃。氧(yang)(yang)化(hua)(hua)(hua)(hua)鋯(gao)是(shi)一(yi)種當溫(wen)(wen)度(du)超過600℃時只傳(chuan)導氧(yang)(yang)離子的電(dian)(dian)(dian)(dian)(dian)解質(zhi)，故(gu)而(er)鋯(gao)池電(dian)(dian)(dian)(dian)(dian)極輸(shu)出(chu)端之間(jian)產(chan)生的電(dian)(dian)(dian)(dian)(dian)動勢隨著參比(bi)電(dian)(dian)(dian)(dian)(dian)極與策略電(dian)(dian)(dian)(dian)(dian)極之間(jian)的氧(yang)(yang)分(fen)壓差比(bi)率以及氧(yang)(yang)化(hua)(hua)(hua)(hua)鋯(gao)溫(wen)(wen)度(du)的變化(hua)(hua)(hua)(hua)而(er)變化(hua)(hua)(hua)(hua)。依(yi)據(ju)能斯特方(fang)程，接觸煙道氣(qi)(qi)體的電(dian)(dian)(dian)(dian)(dian)極會(hui)隨著煙氣(qi)(qi)的氧(yang)(yang)含(han)量(liang)(liang)影(ying)響氧(yang)(yang)分(fen)壓變化(hua)(hua)(hua)(hua)導致鋯(gao)池輸(shu)出(chu)電(dian)(dian)(dian)(dian)(dian)動勢的變化(hua)(hua)(hua)(hua)。氧(yang)(yang)化(hua)(hua)(hua)(hua)鋯(gao)輸(shu)出(chu)電(dian)(dian)(dian)(dian)(dian)動勢隨著氧(yang)(yang)含(han)量(liang)(liang)的減小對數行地增加，從而(er)滿足(zu)低氧(yang)(yang)含(han)量(liang)(liang)下具有(you)高靈敏度(du)測試要求。

二、氧化鋯氧量分析儀怎么標定

氧(yang)(yang)化鋯(gao)氧(yang)(yang)量分析(xi)儀標定方法如下：

1、本底校驗：這個(ge)必(bi)須是在空(kong)氣(qi)(qi)(qi)中校驗，如果(guo)不是在空(kong)氣(qi)(qi)(qi)中，殘(can)留氣(qi)(qi)(qi)體(ti)就降低了標(biao)定的(de)參考值(zhi)，不能達(da)到空(kong)氣(qi)(qi)(qi)的(de)氧(yang)量值(zhi)。我們擰下標(biao)氣(qi)(qi)(qi)口(kou)，標(biao)氣(qi)(qi)(qi)口(kou)在氧(yang)化鋯探頭的(de)接(jie)線盒中，將探頭放在空(kong)氣(qi)(qi)(qi)中，設(she)置（SET）菜(cai)單(dan)進入，根據(ju)說明書(shu)的(de)步驟，將光標(biao)選(xuan)中“本底自(zi)動校驗”，等到氧(yang)量表顯示20.6左右即(ji)可。由于(yu)是已(yi)經用過(guo)的(de)探頭，內(nei)部肯定會有殘(can)留的(de)氣(qi)(qi)(qi)體(ti)，所以(yi)顯示值(zhi)20.6左右。

2、標氣自動校驗：同樣的是要擰下氧化鋯(gao)氧量分析儀標(biao)氣(qi)(qi)口(kou)，同(tong)樣的標(biao)氣(qi)(qi)口(kou)在(zai)，氧(yang)化(hua)鋯(gao)探(tan)頭的接線盒(he)中，我(wo)們(men)(men)通入標(biao)氣(qi)(qi)，根據說明(ming)書標(biao)定(ding)(ding)的步驟，選(xuan)型“標(biao)氣(qi)(qi)自動(dong)校(xiao)驗(yan)(yan)“，在(zai)銷售氧(yang)化(hua)鋯(gao)分(fen)析儀的同(tong)時，也有標(biao)氣(qi)(qi)提供，客戶可(ke)以選(xuan)購(gou)使用。標(biao)氣(qi)(qi)通常(chang)有4L和8L的標(biao)氣(qi)(qi)。在(zai)標(biao)氣(qi)(qi)自動(dong)校(xiao)驗(yan)(yan)前，我(wo)們(men)(men)通常(chang)先進行本底(di)校(xiao)驗(yan)(yan)，本底(di)毫伏信號是(shi)否在(zai)0MV左右，越靠近0MV說明(ming)越準，待穩定(ding)(ding)后，將(jiang)濃(nong)度(du)校(xiao)準到空(kong)氣(qi)(qi)濃(nong)度(du)。