Supplier of burner operating under pressure 2

[Michael2006]

I need to heat an inert gas stream (6 bar, 60 ton/h, mainly nitrogen) from 250°C to 500°C by mixing it with gas from a natural gas burner (duty = 5.5 MW). The burner itself must, of course, operate at 6 bar for this to work. All the burner suppliers I've tried so far have been unable/unwilling to quote because the burner has to operate at higher than atmospheric pressure. Can anyone point me in the direction of a suitable supplier for my application?
Many thanks,
Mike

 

[dcasto]

you would have to have combustion air at 6 bar too. Instead of burning in a burner, it may need a catalytic reaction to "burn". much like the platnium catalytic converters on a car. I built a plant that did this. O2 was in the gas stream and we needed it converted to CO2 (actually we needed to get rid of the O2). We heated the stream up to 400C, ran the gas across Pt beds. The gas temp went to 550 c, we cooled it down by preheating the gas.

 

[Michael2006]

I realise that the combustion air must also be at 6 bar, but perhaps this wasn't clear from my first post. That seems to be the main difficulty that the burner vendors I've contacted so far have with this application.

The inert gas contains around 3% O2, but I have the catch 22 situation that to use natural gas on platinum I need a preheat of 400°C or thereabouts, whereas the inert gas comes at 250°C. (Hydrogen would work but it isn't available.)

 

[sshep]

Why not use an electric heater or a fired heater? You can get lots of quotes and alternatives for those items- much more common than direct firing at pressure.

best wishes,
sshep

 

[Jason5000]

It might be worth checking with Air Liquide or Ford, Bacon, & Davis if you haven't yet. This sounds a little like an SRU reaction furnace or TGTU RGG in that it operates at a positive pressure. I believe they have some expertise in these types of burners.

 

[dcasto]

Optimized Process Design in Houston, TX build our catalytic O2 removal system.

 

[Michael2006]

Thanks to everybody for your comments and suggestions, expecially to dcasto - hydrogen is available on site, so the idea with the catalytic burn may be applicable after all - and to Jason for the idea with the SRU burner manufacturers. I'm following up both avenues.