Coal slime dryer, also named as sludge dryer, is mainly used to dry materials like slime, raw coal, flotation clean coal, mixing clean coal, slag, clay, bentonite, limestone, sand, quartz stone, metal concentrate, waste residue and tailing, etc. As its name implies, bag filter is a kind of filter to collect poisonous dust and gas. In order to protect environment, the bag filter must play the full role when coal slime dryer works.

Before the shut-down of bag filter, except for necessary dust cleaning, some other matters need us to notice. Sweating, caused by cooling for hot air, often occurs in bag house. Thus, before the cooling process for whole dedusting system, we need to replace the cooled or wet air inside with dry air. In another words, after the shut-down of coal slime dryer or sludge dryer, the exhaust blower of bag filter should still operate for some time.

During long-term shut-down period, frequent cleaning and anti-rust work for coal slime dryer should be carefully carried through for the fear of the entry of rain and dust into bearings. Before shut-down, we should clean the accumulated dust in hopper and inject oil in bag filter and transmission parts. The best way to keep excellent working condition of bag filter is to make it run in a short period without any load.

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