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        十二、袋式脈沖除塵器的調試及維護

        十二、袋式脈沖除塵器的調試及維護

        • 分類:常見問題
        • 作者:
        • 來源:
        • 發布時間:2013-04-24 18:06
        • 訪問量:

        概要:從目前袋式除塵器在糧食飼料行業運用情況看,存在重選型,輕風網設計的問題,并忽視除塵系統的調節與維護。

        十二、袋式脈沖除塵器的調試及維護

        概要:從目前袋式除塵器在糧食飼料行業運用情況看,存在重選型,輕風網設計的問題,并忽視除塵系統的調節與維護。

        • 分類:常見問題
        • 作者:
        • 來源:
        • 發布時間:2013-04-24 18:06
        • 訪問量:
        詳情

        從目前袋式除塵器在糧食飼料行業運用情況看,存在重選型,輕風網設計的問題,并忽視除塵系統的調節與維護。 糧食飼料行業中處理的含塵氣體濃度較高,很大一部分除塵器是作為中間分級處理設備,除塵器選擇是達到工藝要求的關鍵一步,但更不應忽視整個除塵風網的設計,風網設計的優劣直接關系到除塵系統的能量消耗、工作能力和除塵效率。除塵系統達到設計要求還取決于系統的調試和維護。

        袋式脈沖除塵器的調試及維護

        袋式脈沖除塵器的調試

        對于調試,專業廠家的除塵器使用說明書中都作了詳細的敘述。調試分為空載調試和負荷調試??蛰d調試主要確認單機的機械運行和風網的有效性,電氣聯動的可靠性和程序控制的合理性。負荷調試主要是單機風網的性能調節,使其達到設計要求。

        空載調試的一般程序:

        ①檢查傳動部分(排灰機構)是否有異物,點動關風器動力開關,檢查關風器的運轉方向,排灰絞龍運轉是否平穩無異響,并使其正常運轉的時間應不小于0.5小時。

        ②檢查風機是否有異物,關閉調節閥,點動風機動力開關檢查風機的運轉方向。

        ③檢查工藝管道的支撐,連接是否穩定牢靠。打開除塵器的檢查門,檢查濾袋安裝的牢靠、密封性,開啟風機進行管路運行試驗,做到管路運行無異響,密封性好。

        ④檢查電源和氣源無誤后接通,打開脈沖控制儀按數字顯示的順序檢查核實控制線和電磁閥的連接順序,確認各電磁閥按順序動作無誤。按照脈沖控制儀說明書設定控制回路,電磁閥的個數應與控制儀的輸出回路相配。進行脈沖寬度(即電磁閥的噴吹時間)脈沖間隔(即相鄰電磁閥之間噴吹的時間間歇)的調整,脈沖寬度調節范圍:0.03~0.3秒,脈沖間隔調節范圍:3~60秒。要求脈沖控制儀要有準確的脈沖信號輸出,數碼管顯示的程序數字應無紊亂現象。

        ⑤觀察電磁閥的動作是否靈敏可靠,活動銜鐵的開關聲響是否清晰無紊亂現象,各脈沖閥的噴吹時間及開啟程度一致。

        ⑥調試完后請關閉電源、氣源,關閉調節閥做好現場設備的安全保護。

        負荷調試的一般程序:

        ①負荷調試必須在空載調試后進行,負荷調試遵循整個工藝試車方案,根據工藝順序運行除塵器。

        ②除塵器在使用前,壓縮空氣如是集中供給應先打開氣閥,檢查壓力值,如是空壓機供氣,應先啟動空壓機 (一般應提前15分鐘),待壓力上升到一定值時依次啟動關風器、脈沖控制儀系統,過5分鐘,再啟動風機,啟動風機前將調節閥關閉,待風機運轉正常后再緩慢打開風門。

        ③除塵器處于工作狀態,觀察脈沖控制儀、電磁閥的工作狀態,確認正常后,短時關閉風機和脈沖控制儀,打開檢查門查看濾袋的表面集灰情況,并根據含塵氣體的粉塵濃度來調整脈沖寬度、脈沖間隔。

        ④在除塵器開始正常運行的一段時間內,要不斷觀察其工作狀態,觀察或檢測除塵器,以更好地調整脈沖寬度和間隔,防止過度清灰或清灰不足,這兩者都會影響除塵器的工作狀態和性能。

        ⑤調節各吸風口上的調節閥,使吸風口的吸風量符合要求,使整個風網處于合理運行狀態。

        ⑥如除塵器設備本身無工作缺陷,而整個風網不能正常工作,應檢查風網的暢通狀況,風機的工作參數,從而判定是風網設計問題還是除塵器和風機的選型不合理。

        ⑦除塵系統調試完畢后如要停車,請按以下停車次序進行,先停風機,過N分鐘再??諌簷C,N大于或等于三個噴吹周期,待壓力下降至<0.2MPa以下,關閉脈沖控制儀系統,再延時5分鐘使灰斗內粉塵排完后關閉關風器。

        袋式脈沖除塵器的維護

        維護與維修時應切斷電源、氣源并使氣包處于常壓下進行。進行除塵器內保養、維修時,應清理干凈里面的粉塵,并靜置后反復清理,確保里面無粉塵,照明設置時嚴禁使用明火。在現場要配置滅火器,防止發生粉塵爆炸事故。

        ①建立定期的檢修制度,以便及時發現問題,防止重大事故發生。

        ②除塵器周圍嚴禁堆放易燃易爆物品,通風情況良好。

        ③定期檢查除塵器的密封狀態,風網(包括風機)的運行狀態。

        ④定期檢查濾袋,破損時要及時更換,對備用濾袋的存放也要注意干燥、通風防塵,并要定期檢查。

        ⑤定期清理氣源處理器中的雜質和積水。

        ⑥定期給傳動裝置加油,加完后一定要注意防塵,關閉檢修口時一定要安裝好密封墊。

        ⑦保持脈沖控制儀和電磁閥的干凈,無灰塵油污,定期檢查電磁閥上的控制線圈。

        ⑧設備、風管表面的粉塵層應即時清理。

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