Hello.

Slowly pouring water onto a very, very hot vessel so there is instant steam production; how is that method called ?

-It is not 'flash' distillation-

 

Miguel

No, it's not flash distillation, because in distillation you separate 2 (or more) components form each other.

What you describe is just heating up water really really fast. The name of that I don't know, because it's not used in industry for steam production. Pouring water on something is only used to really quickly cool the "something". In that case it's called "quench cooling".

Steam production is done more efficiently.

 

It might be just "flash evaporation", which does not necessarily include a separation. But usually a flash is a reduction in pressure rather than an increase in temperature.

 

My best guess for the name of what you describe is "instantaneous evaporation", or something like that.

 

If you can explain us why the water is poured on the vessel, then we can maybe find the name.

it is flash evapouration, it just isn't isenthalpic(you're pumping lots of heat in) so the pressure does not need to drop for the evapouration to occur.the pressure drop is usually a matter of necessity than choice.

Thanks.

Yes, it is to happen at atmospheric pressure, for distillation; and as suggested, 'flash evaporation' makes better sense than 'flash distillation' even when that is usually named when performed at partial vacuum.

 

Miguel

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...If you can explain us why the water is poured on the vessel, then we can maybe find the name.

 

The instantaneous steaming is because pouring the water slowly seems the preferred method for a small size vessel that is permanently at 600 C + and evaporation is wanted for distillation. The agitation from boiling causes an undesirable spill effect in this small vessel.

The excess high-heat at the vessel is a waste by-product of a combustion process, trying to be used in the needed distillation instead of dedicating an additional heat source. The vessel is to be periodically scraped to remove deposits left from the evaporation.

 

Miguel

Edited June 29, 200916 yr by Externet
Consecutive posts merged.