Swirling problem at boiler’s start-up
At boiler’s start-up, one should take care of water swirling at boiler’s Drum, especially when you start at [FONT="]Cold Start Mode.[/FONT]
Swirling at cold start, makes water level fluctuates very much at the [FONT="]Drum[/FONT]. Therefore it can trip the boiler with [FONT="]Drum level Hi Hi protection[/FONT] ([FONT="]MFT).[/FONT]
Imagine you have some of water in a kettle, and you start boiling the water, the mixture will be water and bubbles. That is what happened at drum but with so many fluctuations.
Water swirling takes time until [FONT="]water level[/FONT] stabilize, when a build up pressure at Drum equal to [FONT="]1 barg[/FONT]. You can notice this from the [FONT="]Drum level indicator[/FONT].
So, how can we eliminate such this problem?
1- Open [FONT="]start up blow off[/FONT] valves ( 2 valves )
2- Open [FONT="]continuous blow down[/FONT] valve ( 1 valve )
3- Reduce [FONT="]warm up fuel[/FONT] flow mass ( rate of fuel )
https://science-hamza.blogspot.com/
Replies
-
gohmIn addition to the mechaincals aspects, there are also chemical treatments that can assist, specially anti-foaming agents. -
khaled hamzaCan you tell us more about chemical aspects in such this phenomena ?
You are reading an archived discussion.
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