How do you clean a flour screw conveyor?

I have in my mill 2 screw conveyor of flour 20 m as length how I can cleasn it from flour under the screw .

Is it easy to disassembly ? If it then that's the best route in order to remove all debris ...but it can mean a longer downtime

Or have you tried some portable power vacuum? If that works do it more frequently as a preventative maintenance process.

Back in my day we had third party silo experts do this for us every year

Is it easy to disassembly ? If it then that's the best route in order to remove all debris ...but it can mean a longer downtime

Or have you tried some portable power vacuum? If that works do it more frequently as a preventative maintenance process.

Back in my day we had third party silo experts do this for us every year

it's not ease to disassemble

i indeed tried to clean it manually by removing flour still at the bottom with our hands but it need long time

also i tried to remove it by vacuum machine but it take a long time due to lower capacity of vacuum machine  

i have an idea for this problem if this screw conveyor have a hole at the bottom as its tall , when i need to remove the bad flour i'll need to open the door of hole to see flour falls from auger .