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Estimating Gas Velocity


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#1 Aneken

Aneken

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Posted 14 November 2014 - 01:19 AM

Hi All

 

For a project, i am dealing with a gas which is entrained with solid particles. The flow rate of the gas is 500 kg/hr. Density of solid laden gas is around 5 Kg/m3(say) at operating temperature and pressure.

 

I want to do a prliminary estimate of the separator vessel's diameter.

 

I am thinking of applying the following methodology for the same:

 

Volumetric flow rate = Area x Velocity

 

Is the above methodology correct?

 

If yes, than what should be the velocity of the gas  ?

 

Should it be the same as the velocity , i have used to determine pipe size which is around 15 m/sec(assumed).??

 

Is there any relation to determine velocity like we have Souder's-Brown equation for Vapor-liquid separation.??

 

Thanks in advance.



#2 breizh

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Posted 14 November 2014 - 05:52 AM

Hi Aneken ,

Let you consider technology like Cyclone or Filtration , the PSD of the solid is an important factor for the selection of the equipment .

Consider Google to support your work.

My 2 cents

 

Breizh



#3 Aneken

Aneken

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Posted 15 November 2014 - 02:30 AM

Hi Aneken ,

Let you consider technology like Cyclone or Filtration , the PSD of the solid is an important factor for the selection of the equipment .

Consider Google to support your work.

My 2 cents

 

Breizh

Thanks for your reply Breizh.

 

I dont have any Particle Size distribution data (PSD) with me.

 

Moreover , i want to just estimate the size.(size estimate only).

 

So it would be a great help if you could let me know if the methodolgy adopted by me is right or not.?

 

Also these questions are baffling me

 

Should it be the same as the velocity , i have used to determine pipe size which is around 15 m/sec(assumed).??

 

Is there any relation to determine velocity like we have Souder's-Brown equation for Vapor-liquid separation.??

 

I would really appreciate your help in this regard.



#4 breizh

breizh

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Posted 15 November 2014 - 03:56 AM

Aneken ,

 

To get an effective separation you need

1) to drop the velocity significantly .

2 ) to force a change of the direction of the gas flow which will facilitate the separation gas/solid ,

3  to add a baffle or inverse cone to prevent the carry over of solid .

 

notes : *Perry's chemical handbook should  help you , check solid/gas separation .

 

additional resource

 

http://books.google....ulation&f=false

 

Good luck.

 

Breizh


Edited by breizh, 15 November 2014 - 05:18 AM.





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