Sparging hot gas

[robot6]

What are your thoughts about sparging hot gas?

I imagine that if you can take relatively hot gas, say 400C or so, and introduce it into water, the bubble collapse might really aid mass transfer, moving in from diffusion/film limited to really be solubility limited. Also, this would increase the agitation within the fluid and affect the fluid's apparent diffusion rate. How might it be possible to introduce such a hot gas? Surely this has been considered.

Maybe a ceramic insulating floor in the vessel with holes in it? What are your thoughts on this matter? Thanks!

 

[ehbadger]

we sparge hot vapor into reactors. although it's not 400C, but rather 400F. brick lined vessel. metallic spargers.

 

[EdStainless]

There are special systems for direct steam injection used for process heating. pickheaters.com
I have no idea how hot they will operate.
They can be used to provide very precise control of the outlet temp (cooking applications).

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube

 

[sshep]

Hello robot6,

I also think you can use the same principles of direct steam injection into cold water. Search komax.com. I got a lead to a scepter tank heat from engtips many years ago, but they have many solutions, and possibly high temp alloy. I am sure there are others.

Mixing a gas reactant using only inlet feed gas velocity (possibly implied by your post) can be difficult to design for many cases. I recently worked on a project which attempted something similar and it failed. Additional provisions for liquid mixing had to be installed to mitigate that design flaw.

Best wishes,
SShep

 

[robot6]

Folks,

Thanks for the help. I will check these out.

-robot6

 

[StoneCold]

If you want it to do the mixing as well you might be able to use an educator system. Hot gas into liquid can be super loud if you don't disperse the gas into small bubbles. We do it a room temperature with a static mixer. That might work for your hot gas as well. We can get an unstable almost homogeneous liquid gas mixture out of our static mixer.


Regards
StoneCold