Archive for category Burner Control
Written by: A.J. Piskor
I was talking to a customer a few weeks ago, helping him with a Honeywell Flame Safeguard/scanner inquiry on a thermal oxidizer application. We started talking about the burner and he mentioned that he was tuning the burner based on the oxygen coming out of the stack.
This is a common practice for technicians working on boilers, radiant tubes, and immersion tube applications where 100% of the exhaust is coming from the burner and is not diluted by any process air. However, this is a bad practice to apply when working on an oxidizer, oven, dryer, or a multi-burner application.
A typical combustion system is complex to say the least. It is usually made up of various devices from multiple vendors that have to be combined and connected in order for the system to work. These systems are not typically flexible and are hard to change once the system has been set up.
Honeywell has come up with a completely new system that provides limitless flexibility with fewer components. This product has been designed as a fresh start for the combustion industry or in Honeywell’s words, “It’s time to wipe the SLATE clean.”
More and more people are using Modbus to get data from their instruments and controllers back into their control systems for reporting, alarming and troubleshooting.
And while I can’t be there to help you set up your Modbus master, I can give you 13 rules and some general practice advice for communicating to any Modbus RTU device.
If you use thermocouples in high-temperature applications, you’re aware of the issues thermocouple drift can cause. Thermocouples drift. It’s not a question of IF, it’s a question of WHEN. And thermocouple drift costs processors time and money in processing errors, waste, downtime, and lost production.
Thermocouple drift occurs due to metallurgical changes of the metal alloy elements over the extended use of the sensor. Thermocouples can drift by as much as several degrees per year.