廠傢分析熱風爐停爐後如何保養？保養技巧？

停爐後的熱風爐，鍋內潮濕積水，爐體外部有煙灰爐渣的侵蝕和銹蝕，如保養不好，停爐期間的腐蝕往往比運行時更為嚴重。那麼熱風爐停爐後如何維護保養？ 據銘源石化技術人員介紹，熱風爐停爐後的維護保養，分為爐體外部和鍋內的防腐保養。鍋內的防腐保養，按停爐時間長短有幹法保養和濕法保養兩種。 在熱風爐長期停用時，應十分註意爐體外部的防腐保養問題。首先在熱風爐停爐冷卻後，必須徹底清除受熱面的積灰和爐排上部、爐體下部的灰渣。
Hot blast stove after stopping, wet water accumulated in the pot, ash and slag erosion and corrosion outside the furnace, such as poor maintenance, the corrosion during stopping is often more serious than that during operation. How to maintain the hot stove after shutdown? According to Mingyuan Petrochemical technicians, the maintenance of hot blast stove after shutdown can be divided into external and internal anti-corrosion maintenance. In the pot, there are two kinds of anticorrosive maintenance: dry maintenance and wet maintenance. When the hot stove is out of service for a long time, the problem of anticorrosion and maintenance should be paid much attention to. Firstly, after the stoppage and cooling of the hot blast stove, the ash deposit on the heating surface and the ash slag on the upper part of the grate and the lower part of the furnace body must be thoroughly removed. 然後要保持煙道有一定的自然通風。一般情況下，為瞭防潮應在爐膛、煙道中放置幹燥劑。如以生石灰作為幹燥劑，則每立方米爐膛或煙道內一般應放置3kg左右。放置後應嚴密關閉所有的通風門。生石灰變粉後要更換。如熱風爐房位置低窪，停爐期間地面泛潮嚴重時，則應采用經常小火烘烤和放置幹燥劑相結合的辦法。如果熱風爐停爐時間很長，在徹底清除煙灰後在爐體金屬外表面塗以紅丹油或其它防腐漆。至於爐體內部停爐的防腐保養方法，則要按停爐時間的長短來定。一般情況下，停爐不超過一個月的可用濕法保養，一個月以上的應采取幹法保養。
Then there must be some natural ventilation in the flue. Generally, in order to prevent moisture, desiccant should be placed in the furnace and flue. If lime is used as a desiccant, it should generally be about 3kg per cubic meter of furnace or flue. All ventilation doors should be closed after placement. After replacement of quicklime, powder should be replaced. If the hot blast stove house is located in a low-lying area and the ground floods are serious during the stoppage period, the combination of regular small fire baking and the placement of desiccant should be adopted. If the hot blast stove has been shut down for a long time, red red oil or other anticorrosive paint shall be applied on the outer surface of the furnace body metal after thorough removal of soot. As for the furnace's internal anticorrosive maintenance method, it should be determined according to the length of the furnace. Generally, wet maintenance is available for no more than one month after stopping the furnace, and dry maintenance should be adopted for more than one month.
幹法保養時要註意以下幾點問題：幹燥劑不要直接接觸熱風爐金屬表面，可裝在鐵盤等容器內；放置幹燥劑後，要關嚴手孔和其它孔蓋，汽、水管道上的閥門必須截斷；生石灰變粉應及時更換。而采用濕法保養時，要註意爐水最好用凝結水，其次可用原有的爐水，再次是軟化水；加堿後，爐水用微火加熱至80 100℃壓力升至2 3表壓後保護2 3小時，使其循环達到爐水堿度均衡，壓力降低時，再把爐水加滿，造成1．5 4表壓，並在整個保養期間一直保持這個壓力，堿度應定期化驗，降低時，應隨時補充；冬天，濕法保養要註意防凍，特別是排污通道和省煤器部分；熱風爐重新使用前應全部放出鍋內堿水，最好備儲液池，环氧地坪以利再用。同時須用凈水沖洗。
In dry maintenance, the following points should be paid attention to: the desiccant should not directly contact the metal surface of the hot blast stove, but can be installed in containers such as iron plates; after placing the desiccant, the hand holes透水地坪 and other hole caps should be closed, the valves in steam and water pipes must be cut off; and the lime powder should be replaced in time. When using wet maintenance, we should pay attention to the best use of condensate water, followed by the original furnace water and softening water; after adding alkali, the furnace water is heated to 80,100 C by micro-fire and the pressure rises to 23 gauge pressures to protect 23 hours, so that the circulation reaches the equilibrium of the alkalinity of the furnace water. When the pressure decreases, the furnace water is filled up again, resulting in 1.54 gauge pressures. The pressure should be maintained throughout the maintenance period, alkalinity should be tested regularly, and should be supplemented whenever it is reduced; in winter, wet maintenance should pay attention to anti-freezing, especially the sewage passage and economizer parts; hot blast stove should release all the alkali water in the pot before reuse, and it is better to reserve the liquid storage tank for reuse. At the same time, rinse with clean water.