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燒發生爐煤氣時，怎樣換火？

2015/12/12 10:40:18??????點擊：
通常，換向操作(zuo)有人工操作(zuo)和電動操作(zuo)兩(liang)種方法。

①  人工操作，是(shi)用人工手搖(yao)進行換(huan)(huan)向。先搖(yao)煤氣交換(huan)(huan)器，后搖(yao)空氣交換(huan)(huan)器。人工換(huan)(huan)向操作行程時間長，勞(lao)動(dong)強度大。

②  電動(dong)(dong)(dong)(dong)(dong)操作，分自(zi)(zi)(zi)動(dong)(dong)(dong)(dong)(dong)、半自(zi)(zi)(zi)動(dong)(dong)(dong)(dong)(dong)兩種，常用是自(zi)(zi)(zi)動(dong)(dong)(dong)(dong)(dong)換(huan)火。因為自(zi)(zi)(zi)動(dong)(dong)(dong)(dong)(dong)換(huan)火是按(an)一(yi)定的時(shi)(shi)(shi)間(jian)間(jian)隔進行的，若(ruo)有(you)熱修等情況，需縮短或延(yan)長換(huan)向(xiang)時(shi)(shi)(shi)間(jian)間(jian)隔，自(zi)(zi)(zi)動(dong)(dong)(dong)(dong)(dong)換(huan)火就收到限制，這時(shi)(shi)(shi)可臨時(shi)(shi)(shi)改為半自(zi)(zi)(zi)動(dong)(dong)(dong)(dong)(dong)換(huan)火。辦(ban)自(zi)(zi)(zi)動(dong)(dong)(dong)(dong)(dong)換(huan)火是人工(gong)通過(guo)電鈕啟(qi)動(dong)(dong)(dong)(dong)(dong)交換(huan)器(qi)，一(yi)般運(yun)行時(shi)(shi)(shi)間(jian)在15~20s，換(huan)向(xiang)操作時(shi)(shi)(shi)先(xian)換(huan)煤氣(qi)，后換(huan)空氣(qi)，否則常因煙道(dao)溫度低(di)造成爆炸(zha)。