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鍋爐煙氣在線監測系統采樣

日期：2021-04-25 信息來源：本站

由(you)于(yu)(yu)煙(yan)氣(qi)(qi)(qi)(qi)傳(chuan)感(gan)器(qi)存在(zai)零漂移(yi)，因(yin)此測量前(qian)先進行煙(yan)氣(qi)(qi)(qi)(qi)校準(zhun)，校準(zhun)后(hou)(hou)，連接(jie)好煙(yan)塵(chen)采(cai)(cai)(cai)(cai)(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)(yang)(yang)(yang)儀(yi)各部分(fen)氣(qi)(qi)(qi)(qi)路，在(zai)采(cai)(cai)(cai)(cai)(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)(yang)(yang)(yang)管中(zhong)(zhong)裝入(ru)已(yi)稱量的(de)(de)(de)(de)濾(lv)筒(tong)(tong)，換(huan)上已(yi)選好的(de)(de)(de)(de)采(cai)(cai)(cai)(cai)(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)(yang)(yang)(yang)嘴。打開(kai)煙(yan)道的(de)(de)(de)(de)采(cai)(cai)(cai)(cai)(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)(yang)(yang)(yang)孔(kong)，清除(chu)孔(kong)中(zhong)(zhong)的(de)(de)(de)(de)積灰，將采(cai)(cai)(cai)(cai)(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)(yang)(yang)(yang)管反(fan)氣(qi)(qi)(qi)(qi)流(liu)(liu)(liu)(liu)方向(xiang)插入(ru)煙(yan)道，采(cai)(cai)(cai)(cai)(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)(yang)(yang)(yang)孔(kong)要(yao)堵嚴(yan)，避(bi)免負壓(ya)系統(tong)采(cai)(cai)(cai)(cai)(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)(yang)(yang)(yang)時(shi)(shi)外界空氣(qi)(qi)(qi)(qi)被(bei)卷入(ru)或正壓(ya)系統(tong)采(cai)(cai)(cai)(cai)(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)(yang)(yang)(yang)時(shi)(shi)高溫(wen)氣(qi)(qi)(qi)(qi)體噴出。當(dang)儀(yi)器(qi)進入(ru)采(cai)(cai)(cai)(cai)(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)(yang)(yang)(yang)狀態后(hou)(hou)，翻轉采(cai)(cai)(cai)(cai)(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)(yang)(yang)(yang)嘴對(dui)準(zhun)氣(qi)(qi)(qi)(qi)流(liu)(liu)(liu)(liu)方向(xiang)。此時(shi)(shi)與氣(qi)(qi)(qi)(qi)流(liu)(liu)(liu)(liu)方向(xiang)的(de)(de)(de)(de)偏差(cha)不得(de)>5°，完(wan)成第一個采(cai)(cai)(cai)(cai)(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)(yang)(yang)(yang)點(dian)的(de)(de)(de)(de)采(cai)(cai)(cai)(cai)(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)(yang)(yang)(yang)后(hou)(hou)，按預先在(zai)采(cai)(cai)(cai)(cai)(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)(yang)(yang)(yang)器(qi)上作出的(de)(de)(de)(de)標識在(zai)水平(ping)方向(xiang)上移(yi)至(zhi)第二個采(cai)(cai)(cai)(cai)(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)(yang)(yang)(yang)點(dian)，使采(cai)(cai)(cai)(cai)(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)(yang)(yang)(yang)嘴對(dui)準(zhun)氣(qi)(qi)(qi)(qi)流(liu)(liu)(liu)(liu)方向(xiang)，以此法直至(zhi)完(wan)成此樣(yang)(yang)(yang)(yang)(yang)(yang)(yang)(yang)品的(de)(de)(de)(de)監測。采(cai)(cai)(cai)(cai)(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)(yang)(yang)(yang)結(jie)束(shu)時(shi)(shi)將采(cai)(cai)(cai)(cai)(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)(yang)(yang)(yang)嘴背向(xiang)氣(qi)(qi)(qi)(qi)流(liu)(liu)(liu)(liu)方向(xiang)，關(guan)掉儀(yi)器(qi)電(dian)源，從煙(yan)道中(zhong)(zhong)迅(xun)速取(qu)出采(cai)(cai)(cai)(cai)(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)(yang)(yang)(yang)管。采(cai)(cai)(cai)(cai)(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)(yang)(yang)(yang)結(jie)束(shu)后(hou)(hou)濾(lv)筒(tong)(tong)要(yao)用(yong)(yong)鑷子小心取(qu)放并輕輕敲打前(qian)彎管，用(yong)(yong)細毛刷將附著在(zai)前(qian)彎管內的(de)(de)(de)(de)塵(chen)粒刷到(dao)(dao)濾(lv)筒(tong)(tong)中(zhong)(zhong)，將濾(lv)筒(tong)(tong)用(yong)(yong)紙包好，妥善保存。采(cai)(cai)(cai)(cai)(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)(yang)(yang)(yang)結(jie)束(shu)后(hou)(hou)再重(zhong)測一次(ci)采(cai)(cai)(cai)(cai)(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)(yang)(yang)(yang)點(dian)的(de)(de)(de)(de)流(liu)(liu)(liu)(liu)速，與采(cai)(cai)(cai)(cai)(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)(yang)(yang)(yang)前(qian)的(de)(de)(de)(de)流(liu)(liu)(liu)(liu)速相比，相差(cha)如大于(yu)(yu)20%，樣(yang)(yang)(yang)(yang)(yang)(yang)(yang)(yang)品作廢，重(zhong)新采(cai)(cai)(cai)(cai)(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)(yang)(yang)(yang)。每個斷面采(cai)(cai)(cai)(cai)(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)(yang)(yang)(yang)次(ci)數(shu)不得(de)小于(yu)(yu)3次(ci)，每個測點(dian)連續(xu)采(cai)(cai)(cai)(cai)(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)(yang)(yang)(yang)時(shi)(shi)間不得(de)小于(yu)(yu)3分(fen)鐘(zhong)，取(qu)其平(ping)均值；當(dang)煙(yan)氣(qi)(qi)(qi)(qi)流(liu)(liu)(liu)(liu)速低或含塵(chen)濃(nong)度低時(shi)(shi)，應(ying)延長采(cai)(cai)(cai)(cai)(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)(yang)(yang)(yang)時(shi)(shi)間，采(cai)(cai)(cai)(cai)(cai)(cai)集樣(yang)(yang)(yang)(yang)(yang)(yang)(yang)(yang)品累計的(de)(de)(de)(de)總采(cai)(cai)(cai)(cai)(cai)(cai)氣(qi)(qi)(qi)(qi)量應(ying)大于(yu)(yu)1m3。測試完(wan)全結(jie)束(shu)后(hou)(hou)，應(ying)將儀(yi)器(qi)置于(yu)(yu)干(gan)凈的(de)(de)(de)(de)環境空氣(qi)(qi)(qi)(qi)中(zhong)(zhong)繼(ji)續(xu)抽氣(qi)(qi)(qi)(qi)來(lai)清洗傳(chuan)感(gan)器(qi)，直到(dao)(dao)達到(dao)(dao)要(yao)求。

煙氣采樣中(zhong)，出現含氧量偏高甚至很(hen)高的(de)(de)現象(xiang)，是(shi)由于鍋(guo)(guo)爐(lu)系(xi)統的(de)(de)除(chu)塵(chen)凈化器和鍋(guo)(guo)爐(lu)尾部的(de)(de)煙道密封不嚴造成的(de)(de)，或者是(shi)鍋(guo)(guo)爐(lu)系(xi)統的(de)(de)引(yin)風量大而(er)輸煤量小，不匹(pi)配造成的(de)(de)。應當對鍋(guo)(guo)爐(lu)系(xi)統進行堵漏(lou)維修，調整鍋(guo)(guo)爐(lu)運(yun)行狀況，使鍋(guo)(guo)爐(lu)系(xi)統運(yun)行正常(chang)。