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Posted by steam_burns on December 24, 2004 at 12:14:24:
In Reply to: Re: Steam Drum Level Shutdown posted by Danny on December 20, 2004 at 09:38:12:
: : : Considering the size of the Boiler, it definately sounds like a tuning issue on your level control valve. A boiler that big should be able to handle big swings and shrink and swell of level from steam loads.
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: That's a good idea. We've checked and believe the tuning is appropriate. Have even had boiler controls experts come out and add some control technology that compensates level based on pressure. Anything or anybody else?
Read your post. You never say what kind of drum level control system you are using. An increase in steam flow will definitely not make you trip on low water level. You may have to change to a three element drum level control where steam flow and feedwater flow rates are compared keeping the drum level within acceptable limits