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根據(jù)多年維護(hù)經(jīng)驗(yàn),我們總結(jié)出了一套行之有效的故障判別及處理方法。
1、查看監(jiān)控畫面的數(shù)據(jù)
出現(xiàn)以下情況時(shí),說明控制系統(tǒng)發(fā)生問題,應(yīng)立即通知微機(jī)維修人員維修,同時(shí)操作工到現(xiàn)場進(jìn)行處理。
(1) 經(jīng)常變化的數(shù)據(jù)長時(shí)間不變,且?guī)讉€(gè)數(shù)據(jù)或所有數(shù)據(jù)都不變。
(2) 控制分組畫面中,手動(dòng)自動(dòng)無法切換,或手動(dòng)輸入數(shù)據(jù)后,一經(jīng)確認(rèn),又恢復(fù)為原來的數(shù)據(jù),修改不過來。
(3) 趨勢(shì)圖畫面中,幾條趨勢(shì)都為直線不變。
(4) 監(jiān)控畫面中,多個(gè)數(shù)據(jù)同時(shí)波動(dòng)較大。
公司聯(lián)絡(luò)人:鄭娟萍(銷售工程師)
0592-5173279
:0592-5165561
公司名稱:廈門仲鑫航自動(dòng)化設(shè)備有限公司
公司地址:福建省廈門市思明區(qū)湖濱四里64號(hào)(湖光大廈)第八層A座
公司主營:Allen-Bradley(羅克韋爾)
abb、Siemens(西門子)、 _-_-- plc可編程控制器
Schneider(施耐德)、Westinghouse、Ge _-__- dcs集散式控制系統(tǒng)
判斷波動(dòng)數(shù)據(jù)是否為工藝上相關(guān)參數(shù),若是相關(guān)參數(shù)則通知儀表及微機(jī)人員檢查,看是否某調(diào)節(jié)系統(tǒng)波動(dòng)引起相關(guān)參數(shù)變化,同時(shí)將相關(guān)調(diào)節(jié)系統(tǒng)打到手動(dòng)狀態(tài),必要時(shí)到現(xiàn)場進(jìn)行調(diào)節(jié)。如水溶液全循環(huán)裝置中,尿素合成塔壓力正常時(shí)為l9.67MPa,如果突然大范圍波動(dòng),此時(shí)勢(shì)必引起下游的中壓系統(tǒng)、低壓系統(tǒng)壓力波動(dòng),這種情況是由于幾個(gè)相關(guān)參數(shù)中某一參數(shù)波動(dòng)引起其他參數(shù)變化,并不是控制系統(tǒng)本身故障。
若波動(dòng)數(shù)據(jù)工藝上彼此并無直接影響,則可能為微機(jī)某卡件發(fā)生故障,立即將相關(guān)自調(diào)系統(tǒng)打到手動(dòng)調(diào)節(jié),必要時(shí)到現(xiàn)場進(jìn)行調(diào)節(jié),同時(shí),通知微機(jī)及儀表人員檢查。
當(dāng)發(fā)現(xiàn)多個(gè)自調(diào)系統(tǒng)失靈,監(jiān)控畫面上自調(diào)閥閥位在全開或全關(guān)位置,立即檢查儀表氣源壓力,若氣源壓力小于0.4MPa,則不正常,檢查氣源管道有無堵塞或漏氣現(xiàn)象;若氣源壓力小于0.2MPa,立即進(jìn)行緊急停車。將監(jiān)控畫面上的自調(diào)系統(tǒng)全部打到手動(dòng),將調(diào)節(jié)閥閥位調(diào)到安全位置,通知儀表工檢查氣源,同時(shí)到現(xiàn)場進(jìn)行操作,關(guān)閉調(diào)節(jié)閥兩端的截止閥,用旁路閥操作。
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