SRU FLAME SCANNER ISSUE

[EEENGRX]

There has been a flame scanner failure in our sulphur recovery unit where it was found that the flame scanner port assembly was red hot with the scanner face plate compromised and a coupling had melted resulting in the flame scanner suspended by a conduit. what could have led to this type of failure from a process standpoint or maybe refractory and orifice issue.what would be the likely cause?

 

[EdStainless]

Loss of purge gas, loss of cooling, poor installation, poor design of mounting.

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P.E. Metallurgy, consulting work welcomed

 

[EEENGRX]

Thanks..can you throw more light on how the loss of purge gas could cause this? we use Nitrogen to purge

 

[pmover]

trace the tubing/pipe back to the nitrogen source and investigate.

 

[georgeverghese]

Was there positive indication of purge gas flow to the scanner before this failure?

 

[mk3223]

The typical nitrogen purge system to the scanner is equipped with block valve, regulator, float meter, etc. May verify if any blockage in the N2 purge system.