May I ask about the sequence for removing manholes during the maintenance of a catalytic fractionation tower? Why?
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This post was last edited by wlf1234 on 2019-12-31 08:35. What is the sequence for removing the manholes during the maintenance of a catalytic distillation tower, and why?
This post was last edited by Shutong on 2019-12-30 at 15:58. Please explain in detail what you would like to ask Are you asking about the sequence for removing the manhole?
After cleaning, passivation, and displacement, apply it first from the top, then from the bottom, in the middle
For safety, go up first, then down, in the middle
If disassembly is carried out from bottom to top, the access hatch at the bottom, once opened, will allow air to enter, leading to the formation of ferrous sulfide and even a risk of burning down the tower, which could endanger the lives of those working on disassembling the hatch.
It is generally disassembled from top to bottom and sealed from bottom to top
From top to bottom, to prevent ferrous sulfide from coming into contact with air naturally
Remove the manhole from top to bottom; there are no specific requirements regarding sealing it
From top to bottom, using the chimney principle, let’s study it
I used to only know how to do things; now I understand the need to ask “why”. I hope it’s not too late – I’ve learned something from this.