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Cyclone Liquid Vapor Seperation Tank Design Parameters

Started by Guest_Nicolaos_*, Jul 18 2011 11:21 AM

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#1 Guest_Nicolaos_*

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Posted 18 July 2011 - 11:21 AM

I'm a newly graduated Chemical Engineer now employed as a process engineer.

I'm looking into the design parameters for liquid-vapor cyclone separation tanks. Currently we are using inlet flow rate and vapor rise velocity as design specifications for our tanks. Our tanks are designed in such a way that we create a g-force due to formation of a cyclone. I am looking into the effect of the g-force on the gas-liquid separation.

In this instance I am assuming that the inlet stream contains both vapor and liquid water.

Is there a known parameter or way to measure the effect that g-force has on a this unit operation? Would this just be an application of stokes law with replacing the gravitational constant with the g-force generated?

Are there any known heuristics about this type of separation vessel, such as recommended g-force or related parameters?

Finally, in this application, is the g-force just simply a additional quality assurance measure, or is it actually a large part of the separation?

Thanks a lot, if I was unclear please let me know and I will clarify.
Nicolaos

Edited by Nicolaos, 19 July 2011 - 07:08 AM.

#2 kkala

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Posted 18 July 2011 - 04:09 PM

The closer thread found is http://www.cheresour...h__1#entry42836, you may find useful data there. Or even in other threads of these forums using the search engine.
It is understood that steam with entrained liquid droplets pass from these cyclones to get rid of the droplets. Assuming that these droplets behave like entrained solids, there are mathematical models to predict cyclone efficiency after specifying the droplet size distribution of liquid particles.
A knock out drum to separate droplets has advantage over cyclones. It can retain the droplets at any flow rate.

#3 Guest_Nicolaos_*

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Posted 19 July 2011 - 07:06 AM

Kkala,

Great, thanks. That was very helpful.

Nico

The closer thread found is http://www.cheresour...h__1#entry42836, you may find useful data there. Or even in other threads of these forums using the search engine.
It is understood that steam with entrained liquid droplets pass from these cyclones to get rid of the droplets. Assuming that these droplets behave like entrained solids, there are mathematical models to predict cyclone efficiency after specifying the droplet size distribution of liquid particles.
A knock out drum to separate droplets has advantage over cyclones. It can retain the droplets at any flow rate.


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