Online — Infrared flare pilot monitoring as a primary or secondary monitoring solution provides a pilot status signal when thermocouple failures occur and assures an alternative pilot status measurement is available for the safe flare operation.
Thermocouples don’t always last the duration of the planned operational life between scheduled flare maintenance turn arounds.
A major benefit of implementing an additional infrared pilot monitoring system is that it is isolated from the process and can be installed without removing the flare from operation.
Infrared solutions, such as pyrometers, can provide pilot confirmation signals but also have optional uses that can monitor different flaring conditions. For single elevated flare stacks, the pyrometer monitoring system can be installed as an after-market monitoring solution for both pilot and flaring monitoring.
Gas assist flares can also benefit from a pyrometer solution with implementation of a proportional 4-20 mA output that represents the flaring intensity of a flaring event.
With a proportional output that represents the flaring flame size and intensity the operator can maintain a flame and assist gas levels appropriate to the requirements
of the feed gases to maintain proper flare operation in real time or alarm for conditions outside proper operational levels.
Staged flare systems can also be monitored with pyrometer systems using the proportional 4-20 mA output.
The pyrometer will require a field of view that includes the entire flare tip and all flare stages. Each stage condition will have its own signal level output from the pyrometer based on the stage level being flared. These levels can be logged into the DCS system to provide conditional monitoring to the operator