we have the gas air preheater damag

[Amir Nagy]

we have the gas air preheater damages parts as shown in the photo what could be the reason for the damage parts ?

 

[LittleInch]

So from less than one line of text and a single photo with ZERO Notes or explanation, we're somehow supposed to solve your problem?

Doesn't even look damaged to me, just a bit black.

So I'll take a huge leap and say the heater was damaged because something caught fire which shouldn't have, or it got a lot hotter than it should have.

There, is that a good enough answer?

and I notice that you've made 5 posts and only 2 replies, so I'm not holding my breath for any update....

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[Latexman]

Is that refractory pieces?
Insufficient curing of refractory.
Start-ups/heat-ups that are too fast.

Good Luck,
Latexman

 

[georgeverghese]

Is this some section of the refractory lining adjacent to the convection - economiser bank ( acting as a process gas - fired heater flue gas preheater) of a fired heater ? Other than inadequate drying / curing / commissioning of the refractory lining, it may also be due to high stresses from the nearby piping nozzles of the preheater bank that may have warped the flue gas stack ?