vibrations
vibrations
(OP)
With our new HDS/SAACkE 30ton/hour double fired fire tube boiler we have severe vibration problems. The vibrations are occurring at relatively low, about 1/3, load and at the change over from negative to positive combustion chamber pressure. We’ve managed to improve it by altering the combustion air/gas mixture ratio. But still not to satisfaction.
Does anyone on the forum as experience with this phenomenon. Can anyone suggest me any literature on the matter
Please help
koekoek
Does anyone on the forum as experience with this phenomenon. Can anyone suggest me any literature on the matter
Please help
koekoek





RE: vibrations
HTH
saludos.
a.
RE: vibrations
Another problem I have heard about but not experienced is vibration caused by the flame partly lifting off the burner head. This can be caused by poor (primary)air fuel regulation causing a reduction in flame speed. You may want to try a bit more primary air and see what happens.
Sounds like your boiler is designed for positive furnace pressure; unfortunately I cannot help you much on this as my experience is limited to balanced draft and slughtly negative furnace pressure. However if you do have uncontrolled air flow, it will give you stability problems.
I would take a long careful look at the burner flame; it will often give a clue, if the vibration is combustion induced, and not caused by inadequate tube support.
Cheers
Steve
RE: vibrations
But first I will study the behaviour of the flames as you guy’s suggested
Thank you for that
koekoek
RE: vibrations
RE: vibrations
Hachsaw, I agree
Problem is how to detect the real thing and last but certainly not in the least how to solve the problem in the most economical way.
koekoek
RE: vibrations
I think the most perfect measure is to imporve the inherent frequency of the boiler.
RE: vibrations
this is a fire tube boiler. how will turndown increase the chance for vibration?
RE: vibrations