Re-igniting burner in high temperature chamber

[jinfenggoh]

Dear Readers,

We are looking at using a burner to bring a reactor up to temperature of 650°C and then turning off the burner as the process becomes self sustaining. To reduce down time when a feed shut down occurs, we would like to restart the burner to avoid having to cool the whole system down to air temperature. I have been told that the burner would not be allowed (under regulations) to restart if the temperature in the reactor is under 700°C. Could someone please confirm this temperature and let me know which regulations would mention this limit?

Thank you very much!

 

[youcancallmeAL]

The "regulation" you refer to, is NFPA 86, which states that when you can't auto-ignite(because your chamber, furnace, oven, etc. isn't hot enough ~850C), you have to have a flame safety system in place so you don't allow gas to build up. This is a common control sequence that will confirm the operation of the safety shut-off valves, a trial for ignition, and flame check. This whole sequence should take 2-5 minutes. Further, whoever you buy the burner from should be able to spec out the controls needed.

 

[jinfenggoh]

Hi Al,

Thanks for the information. I also looked-up BS EN 746-2 and the requirement there if for 750°C.

Cheers.