因(yin)為環保法規不(bu)要求對HF進行監測，即便監測也只能使用(yong)激光高(gao)精度的HF分析儀，傅立葉紅外(wai)(wai)和其他紅外(wai)(wai)方(fang)法（包(bao)括濾波紅外(wai)(wai)，如SICK和(he)ESA產品）無法(fa)監測脫(tuo)酸后小于1ppm的(de)HF含量，故(gu)以下方案采(cai)用激光方法測量HF含量。如果需要真(zhen)正監測低濃度的HF含(han)量，建議選用我(wo)公司(si)的(de)高精度的(de)激光GM700 HF分析(xi)儀。

     此時需要監測2根煙囪的HCl、SO₂、NO_X、CO、HF、H₂O、O₂的含量，脫酸效果監測采用“1拖1”的高溫濾波紅外分析儀：即2根煙囪用2套氣體分析儀表，在2個煙囪分別安裝一臺高溫濾波紅外分析儀表。針對HF的測量采用激光法測量微量HF含量，每個煙囪安裝1套高精度激光HF監測儀（GM700）。

     鑒(jian)于(yu)垃圾電廠中氣(qi)體(ti)成分(fen)(fen)(fen)(fen)的復雜(za)性(xing)：含有HCl,NOx,SO2,以及(ji)NH3，使(shi)用(yong)(yong)常(chang)用(yong)(yong)的常(chang)溫(wen)(wen)(wen)(wen)(wen)(wen)分(fen)(fen)(fen)(fen)析(xi)(xi)方法時，需要將氣(qi)體(ti)溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)降(jiang)低(di)到常(chang)溫(wen)(wen)(wen)(wen)(wen)(wen)，此時水已(yi)經變(bian)成液態(tai)，即便在(zai)快(kuai)速冷凝后，也(ye)(ye)會(hui)有少量水生(sheng)成，大部分(fen)(fen)(fen)(fen)酸性(xing)氣(qi)體(ti)此時也(ye)(ye)在(zai)酸的露(lu)(lu)點(dian)以下，容(rong)易(yi)生(sheng)成腐蝕性(xing)極(ji)強的混合酸，將分(fen)(fen)(fen)(fen)析(xi)(xi)氣(qi)室腐蝕，極(ji)大地降(jiang)低(di)了分(fen)(fen)(fen)(fen)析(xi)(xi)儀(yi)表的使(shi)用(yong)(yong)壽(shou)命；在(zai)此溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)條件下，酸性(xing)氣(qi)體(ti)也(ye)(ye)容(rong)易(yi)與NH3反應生(sheng)成固體(ti)銨鹽(yan)，使(shi)管路極(ji)其容(rong)易(yi)堵塞，維護量極(ji)大。故建議使(shi)用(yong)(yong)高(gao)(gao)(gao)(gao)溫(wen)(wen)(wen)(wen)(wen)(wen)分(fen)(fen)(fen)(fen)析(xi)(xi)儀(yi)表，高(gao)(gao)(gao)(gao)溫(wen)(wen)(wen)(wen)(wen)(wen)分(fen)(fen)(fen)(fen)析(xi)(xi)儀(yi)表在(zai)高(gao)(gao)(gao)(gao)溫(wen)(wen)(wen)(wen)(wen)(wen)條件下采(cai)樣，使(shi)用(yong)(yong)高(gao)(gao)(gao)(gao)溫(wen)(wen)(wen)(wen)(wen)(wen)伴熱管線，全程溫(wen)(wen)(wen)(wen)(wen)(wen)控在(zai)180℃以上(shang)，并在(zai)此溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)時進行直接(jie)分(fen)(fen)(fen)(fen)析(xi)(xi)，控制(zhi)氣(qi)體(ti)在(zai)酸的露(lu)(lu)點(dian)和(he)(he)水的露(lu)(lu)點(dian)之(zhi)上(shang)，不(bu)會(hui)生(sheng)成酸，對(dui)儀(yi)表不(bu)會(hui)產生(sheng)腐蝕和(he)(he)堵塞。

煙(yan)塵(chen)儀、流量(liang)(liang)(liang)(liang)計、溫(wen)度/壓力儀測(ce)量(liang)(liang)(liang)(liang)后數(shu)(shu)據以4-20mA信(xin)號(hao)輸(shu)入數(shu)(shu)據采(cai)集(ji)系(xi)統(tong)(tong)；氣態參數(shu)(shu)監測(ce)子系(xi)統(tong)(tong)為全過(guo)(guo)程高(gao)(gao)溫(wen)抽取法，即煙(yan)氣經由(you)加熱探(tan)桿和(he)高(gao)(gao)溫(wen)探(tan)頭抽取，經過(guo)(guo)濾粉(fen)塵(chen)后進入高(gao)(gao)溫(wen)輸(shu)氣管線、流量(liang)(liang)(liang)(liang)調節(jie)后進入高(gao)(gao)溫(wen)多組(zu)分紅外分析儀進行(xing)測(ce)量(liang)(liang)(liang)(liang)，測(ce)量(liang)(liang)(liang)(liang)結(jie)果(guo)在儀表上(shang)就有顯(xian)示，另外也(ye)(ye)有4-20mA信(xin)號(hao)輸(shu)入數(shu)(shu)據采(cai)集(ji)系(xi)統(tong)(tong)；系(xi)統(tong)(tong)控(kong)制及數(shu)(shu)據采(cai)集(ji)處(chu)理(li)(li)子系(xi)統(tong)(tong)可(ke)采(cai)集(ji)測(ce)量(liang)(liang)(liang)(liang)信(xin)號(hao)，并進行(xing)運(yun)算、統(tong)(tong)計、存(cun)貯、事件(jian)(jian)分類處(chu)理(li)(li)（電源故(gu)(gu)障、排放源停(ting)運(yun)、校準、維護、排放超標(biao)、缺失數(shu)(shu)據、超測(ce)定(ding)上(shang)限、儀器故(gu)(gu)障等等，事件(jian)(jian)分辨率≤20ms）、數(shu)(shu)據合理(li)(li)性檢查和(he)可(ke)以刪除(chu)指定(ding)的(de)(de)記(ji)錄等。另外各被測(ce)組(zu)分的(de)(de)信(xin)號(hao)也(ye)(ye)送到(dao)DCS（模擬量(liang)(liang)(liang)(liang)或(huo)RS485）。

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