COMBUSTION
SERVOMEX COMBUSTION ANALYSIS SOLUTIONS
For O 2 analysis, Tunable Diode Laser (TDL)
analyzers offer an average path
measurement across all burners, while
Zirconia analyzers measure a single point.
TDL is susceptible to a range of
environmental factors that must be
compensated for, including path length
variation, window purge gas effects,
optical interferences and changes in
temperature and pressure.
Zirconia and TDL analyzers offer great
advantages when considered as
complementary techniques for combustion
control. It is not unusual to see a
SERVOMEX COMBUSTION MEASUREMENTS IN THE PROCESS HEATER
CO reaction
almost complete
The oxygen measurements are relatively
comparable; however, the measurement
of the carbon monoxide with TDL showed
a marked improvement in performance
with a faster speed of response, ideal for
both efficiency and – more importantly
– safety, albeit at the cost of having a
second analyzer.
TDL measurements can also be built into
flame-out protection, specifically the
measurement of methane (CH 4 ) in natural
gas burners. If a TDL analyzer is installed
so that a burner flame-out can be
detected quickly, it enables greater
flexibility and response to control and
shut down processes.
TDL lasers come complete with SIL (Safety
Integrity Level) certification and so can
be incorporated into safety systems in a
relatively straightforward manner.
CONTROLLING COMBUSTION