HRSG Duct Burners
HRSG duct burners can challenge flame detection two ways:
1) Air turbulence can move the flame out of range where the flame scanner swivel joint was aimed. Instead of using a UV sensor, which would otherwise be indicated on natural gas, we solve this problem using an IR sensor, from which the flame cannot escape.
2) Burner element corrosion causes variations to fuel flow through holes that either open too much or rust shut. Again, using IR instead of UV, coupled with our dual channel microprocessor technology, solves this problem.
Our fully electronic flame scanners do have long-life semi-conductor sensors versus quickly expiring UV tubes and we have no mechanical shutter to repair.
When the burner plate is congested like this one, placing the flame scanner too far away causes focal length issues and mounting too close could present heat damage.
We solve this problem by screwing a probe directly onto the swivel joint, mounting sensor with electronics to a remote location such as two meters away, and transporting the UV or IR via a robust fiber optic cable as we on gas turbines.
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