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b大修后必須進行伏安特性試驗，冷態試驗和熱態試驗可以根據需要結合分部試運轉及整體試運行時進行，以對設備進行評級和評價檢修工作.電除塵器維修機械部分電場內部及灰斗積灰清除。用人工敲打等方法將電場內陰極框架極線、陽極板排及灰斗的積灰清除干凈。陰、陽極間距檢查調整：檢查陽極板和陰極框架，對變形部分進行校正，保證極距偏差為1mm，使極距符合設計要求。振打裝置檢修。檢查陰振打器連接及安裝位置有無跑偏，振打錘是否與振打桿對中，逐個振打器進行調整校正，振打棒露出長度符合設計要求（382MM）；檢查陽極振打是否正常，對存在問題進行處理。
搪玻璃反應釜減速機制作應符合92標要求，應為設備搪燒完后焊接的；反應釜人孔應用人孔高頸法蘭，高溫強度高，變形小；管口（除視鏡孔外）應全部為平接口，方便配管和維修；管口、人孔應與封頭沖孔對接。這種對接結構非常有利于搪玻璃層質量；人孔蓋應為拱形蓋，而不是平蓋；管口法蘭面、高頸法蘭面邊緣的搪玻璃層不能有片塊剝落和裂紋；上接環外形狀應較為規整，與夾套對接部位應無明顯強行組裝痕跡；下接環應為U形下接環；i.夾套進水口應裝有水力噴咀；j.夾套放氣孔的結構應符合92標。
RQ系列球閥RQ系列固定球球閥是專門為燃氣行業設計制造的，該閥結合了各類球閥的特點，再根據國情開發研制，適用于燃氣長輸干線、城市燃氣設施截止閥。優點如下：耐火性，火災高溫燒毀密封座上的聚四氟乙烯材料后，金屬密封座及各個密封部位均能形成金屬對金屬的密封結構，阻止燃氣介質擴散，防止災情繼續擴大。防靜電，球閥在啟閉過程中形成的靜電極易點燃燃氣，該球閥將靜電導入地下，確保設備安全。限位加鎖，球閥是旋轉機構，容易造成36度旋轉，除了有限位機構外再可加鎖，防止操作人員誤操作或非操作人員擅自操作而引發的事故；第球閥閥桿密封設計有防閥桿沖擊裝置，并采用特殊O型圈密封，力矩比同類球閥小，操作輕便，啟閉快速。
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