from safwan petro. technologies wll,

we have six burner hot oil heater based on honeywell flame control and flame sensing by honeywell flame rods. we have problem that is when initial start getting 1.7 dc v from honeywwell amplifier. then gradually decresing voltage up to 1.0 vdc. and getting flame flame failure. we cleaned and adjusted pilot flame and main flame. but we confirmed this was not from actual flame failure. please answer about my problem.

 

Did you clean or replace the flame rod?

 

To Anonymous,

In my experience, although flame-rod flame-loss detectors are very reliable, they are a high maintenance item. Their failure vs time characteristic do not follow the conventional "bath tub" curve. Thus, in many refineries and chem plants it is standard practice to assign one
full-time instrument technician to maintain them.

However all is not gloom. The unwarranted, or false-trip rate, can be substantially reduced! See the references in my paper "Probabilistic Risk of Equipment Safety Systems!"

Regards,
Phil Corso, PE {Boca Raton, FL, USA}
[[email protected]] ([email protected]) {[email protected]}