Posted by Tony Garcia on January 11, 2000 at 22:40:14:
In Reply to: High Water Alarm posted by Jennifer Golden on January 11, 2000 at 17:35:18:
: Should a steam boiler shut down or alarm for a high water condition? What if any are the consequences of not reacting to a high water condition?
First, I think it would be wise to consult the manufacture of your boilers and/or your level controls. Review also ASME's CSD-1 and sections I and VII of the boiler code. Most of your questions would probably be answered. However, in regards to your question, the boiler should alarm the attendant of a high level condition, but I don't know if it SHOULD shut the boiler down automatically. This should not be taken to mean the boiler should't be shut down, but that depending on the process that the boiler serves you may want the attendant to take immediate actions to recover the boiler from the high level condition first.
Carryover, foaming and priming can have basically the same consequencies; water hammer, fouling of controls subject to steam contact, and if you operate turbomachinery, errosion of turbine blades. The resultant force due to water hammer can even rupture steam lines and fracture turbine blading.
Also, any carry over will contain dissolved soilids which will in turn effect your chemistry in the boiler and contaminate your condensate and feed water.
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