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Re: Loss of water

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Posted by Dan on February 26, 2004 at 21:39:54:

In Reply to: Re: Loss of water posted by Amy on February 26, 2004 at 17:31:24:

Let me guess, you must be a state or insurrance inspector :)jk. I dont seem to recall him say that his supervsors were telling him to fill the boiler up with cold water when it goes low water. Look, if he has a water level problem then he needs to get it fixed. There is absolutly no reason for a boiler to trip on low water with the exception of mechanical failures with the boiler or aux. equipment or if the operator decided to blowdown the water column and forgot to hold down the bypass switch :) For all we know, his boiler is tripping on a limit device and by the time he looks at his boiler he sees the water level out of the glass and any "experienced operating engineer " should know that when any boiler trips on a limit or interlock, the water level drops out of the glass because of the rapid loss of heat collapsing the steam bubble formation in the tubes and the displacement goes away. How does any body know what kind of advice to give people when they don't give descent information. Lets just assume that he doesn't have a water level problem and his boiler tripped because his gas regulator took a dump and he tripped on low gas. Are you going to recommend that he wait all day long to let the boiler cool before he fills it back up and restarts it? Also asumming that they were able to determine the shutdown being caused by the regulator and were able to remidy the problem. All I see around here is people giving opinions based on little to no information and IMHO that could be just as dangerous and filling a hot boiler with cold water. He needs to first ask himself why did my boiler just trip? If he concludes that it was a water level trip whether it be from a first out annunciator, fireye diplay or alarm, then was it because of a tube failure, a drum level control problem with his feedwater valve or controls, did they cavitated their feed pumps, many more thing can go wrong that have nothing to do with the boiler proper and everyone here just told him to let it cool down before he restarts it. Assuming that he doesnt have a catostrophic failure with the boiler proper and by his comments, it leads me to believe that he doesn't by the fact that this is a reoccuring problem, you can fill a hot boiler right back up wilth hot feedwater without fear of blowing yourself up as long as you follow industry standard of no more than 75-100 degrees f /hour. He probably damaged his boiler more if this happens all the time and it countiniualy trips and he depressurizes the boiler more 100 degrees / hour if you were to corrilate pressure to tempuature from a typical steam table. Then again what do I know :)

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