Swirling problem at boiler's start-up
 

[LEFT][B][SIZE=3]At boiler’s start-up, **e should take care of water swirling at boiler’s Drum, especially when you start at Cold Start Mode.[/SIZE][/B]
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[B][SIZE=3] Swirling at cold start, makes water level fluctuates very much at the Drum. Therefore it can trip the boiler with Drum level Hi Hi protecti** (MFT).[/SIZE][/B]
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[B][SIZE=3] 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 fluctuati**s.[/SIZE][/B]
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[B][SIZE=3] Water swirling takes time until water level stabilize, when a build up pressure at Drum equal to 1 barg. You can notice this from the Drum level indicator.[/SIZE][/B]
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[B][SIZE=3] [U]So, how can we eliminate such this problem?[/U][/SIZE][/B]
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[B][SIZE=3] 1- Open start up blow off valves ( 2 valves )[/SIZE][/B]
[B][SIZE=3] 2- Open c**tinuous blow down valve ( 1 valve )[/SIZE][/B]
[B][SIZE=3] 3- Reduce warm up fuel flow mass ( rate of fuel[/SIZE][/B][/LEFT]

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