Swirling problem at boiler’s start-up

khaled hamza

khaled hamza

@khaled-hamza-qmyNzA • Oct 10, 2024


At boiler’s start-up, one should take care of water swirling at boiler’s Drum, especially when you start at [FONT=&quot]Cold Start Mode.[/FONT]
Swirling at cold start, makes water level fluctuates very much at the [FONT=&quot]Drum[/FONT]. Therefore it can trip the boiler with [FONT=&quot]Drum level Hi Hi protection[/FONT] ([FONT=&quot]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=&quot]water level[/FONT] stabilize, when a build up pressure at Drum equal to [FONT=&quot]1 barg[/FONT]. You can notice this from the [FONT=&quot]Drum level indicator[/FONT].
So, how can we eliminate such this problem?



1- Open [FONT=&quot]start up blow off[/FONT] valves ( 2 valves )
2- Open [FONT=&quot]continuous blow down[/FONT] valve ( 1 valve )
3- Reduce [FONT=&quot]warm up fuel[/FONT] flow mass ( rate of fuel )







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  • gohm

    gohm

    @gohm-F3UUpP • Dec 20, 2010

    In addition to the mechaincals aspects, there are also chemical treatments that can assist, specially anti-foaming agents.
    0
  • khaled hamza

    khaled hamza

    @khaled-hamza-qmyNzA • Dec 20, 2010

    Can you tell us more about chemical aspects in such this phenomena ?
    0