How to deal with dust entering the fan
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Can a dust removal hole be created to allow dust to enter the fan? If so, how and where should it be installed? What should be done if not? What is the basis?
This depends on the nature of the dust; if it does not stick to the impeller and cause scaling, and does not affect normal operation, then it can be ignored. If it affects normal use, then it’s necessary to see whether flushing the dust with water can resolve the issue. If possible, it is best to insert a bent tube at the inlet as a nozzle (make sure there are no other connections, as this could lead to accidents if it comes loose). ) Regular jet flushing is carried out; holes are made at the bottom of the fan volute along with valves to remove the water-free fluid being flushed out. Over time, it is likely to accumulate dirt, and then it will need to be disassembled and cleaned. The sandblasting method can be used, and it yields the best results. For reference.
Tips from the design institute for you； The fans we used to extract sulfur vapor back then often experienced sulfur vapor condensing into sulfur powder. Dust easily accumulates on the impeller and settles at the bottom of the fan. The common approaches we use are: 1) Leave a short section at the fan inlet, which is often removed, and install some filtering mesh (the mesh holes should not be too small); 2) Create a maintenance access point at the bottom of the fan housing – there’s no better solution otherwise.
It’s fine to make an opening at the bottom of the housing; we’ve encountered this situation many times. In your case, is it water that has seeped in due to the shutdown of one of the dual fans? Another option is not to make any holes; it’s also possible to remove the fan housing. If you want to rinse it with water, there are holes at the bottom as well as on the top; just rinse it