flame sensor for tip burner monitoring


Thread Starter

jony wibawa

Our plant GE gas turbine frame 9e, used Reuter stokes IR9001 for flame sensor.

Sometimes we have combustion trouble that we guess from any burner tip was trouble. But we can´t predict which burner that trouble.

Can somebody tell us, may be from another power plant that used equipment, likes flame monitor or another that can be monitoring tip burner condition for gas turbine like GE frame 9e?

Thank you
I'm not aware of any instrument which could be permanently mounted in a combustion can to observe or detect "problems" with a fuel nozzle tip. And, remember: A GE-design Frame 9E has 14 combustion cans, hence, a minimum of 14 fuel nozzles/tips (depending on the type of combustion system). So, it could get pretty expensive to install something like what you are asking about.

It would seem you have experienced some kind of tip issues (more than once) in the past and this is leading to your question.

You haven't provided any information about the type of fuel being burned, or the type of problem you have experienced in the past.

If it's liquid fuel, then you can use the selector valve at the Liq. Fuel Flow Divider to observe pressure differentials of the individual combustors to help identify problems with fuel nozzles when you are experiencing high exhaust temperature spreads.

If it's gas fuel, then it gets quite a bit more difficult, if not impossible. Again, because of the number of combustors the cost could get prohibitive, but you could install individual differential pressure sensors at each gas fuel nozzle flange and observe the individual differential pressures. If there is a blockage or an enlargement of the gas fuel nozzle tips it would show up as a change in differential pressure. But this would not be an exact science without a lot of data and monitoring and experience.

Also, most Mark Vs could not accommodate 14 mA inputs, so you would likely need to have an additional monitoring system to connect the differential pressure sensors to.

Also, remember, flame detectors are only installed in four of the fourteen combustion cans on a GE-design Frame 9E. Installing more would involve new combustion cans and liners and a lot of conduit and wiring. And, most Mark Vs can only accommodate a maximum of eight flame detector inputs.

But, again, you haven't provided us with much information about the problem you are experiencing or the conditions when you are experiencing the problem. And, it seems you are not really attempting to solve the root cause of the problem: Why are the fuel nozzle tips "failing" or becoming blocked or enlarged or whatever it is you are experiencing?

There's just too little information here to be of much more help.
Thanks CSA,

We used Mark VI. Our Gas turbine with marine fuel oil (MFO).

Actually, we have problem when start unit 4 times.
At 1800rpm, when change over air booster atomizing to main atomizing, high vibration appear, white smoke and combustion trouble.
After trip, we drain atomizing line, we found marine fuel oil (MFO), not atomizing air or water condensation.

Normally, we found water condensat, because we open manually VTR2-1, because thermostat was broken, for valve regulator at cooling water line-atomizing air, so atomizing temperature still low.

At last Comb inspection, we did not change the ´´copper gasket´´.
From another unit we heard that they periodically changed it.

From GE expert we have idea to check NRV 101 and 201, from atomizing PID. Maybe when our GT stop, we will check it.

He tell us to add pressure transmitter for atomizing pressure monitoring too.

Beside that we have idea to add high temp camera on every burner, but maybe too expensive, need engineering study and not yet installed at another unit GE gas turbine.

Thanks for your reply.