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Acid Gas - Caustic Wash - Hysys Help

h2s scrubber acid gas cleaning

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#1 Max Domingues

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Posted 18 September 2019 - 02:33 PM

Hello to all!

 

Does anybody here could explain me how is the convergence behavior of Hysys on Acid Gas - Caustic Wash package?

 

I am simulating a scrubber to remove H2S and i don't understand the low efficiencies generated by Hysys and, eventually, when i change something - like change the package and then return to the old package - (not on the stream inlet), push run again, the results changes.

 

I know its an 'efficiency' matter but i don't understand what is happening.

 

I know if i change efficiencies manually, i can get any number i want but, at what cost? what is involved? See picture attached.

 

Thank you a lot!

 

Max

Attached Files



#2 sgkim

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Posted 22 October 2019 - 02:00 AM

Should'nt the column be reactive one? 



#3 Max Domingues

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Posted 28 October 2019 - 05:49 AM

Dear sgkim, thank you for your attention to this topic.

 

Unfortunately, i really dont know about about reactive columns on absorpion process in Hysys. :blink:

 

This the reason of my post (to understand and learn more).

 

Could you explain me a little about this?

 

Thank you again.



#4 Nikolai T

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Posted 30 October 2019 - 03:24 AM

Hello,

 

What version of HYSYS do you use? The Acid Gas - Caustic Wash package was released with V11. I didn't find Efficiencies folder in Hysys example file.

 

Regards



#5 Max Domingues

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Posted 04 November 2019 - 11:06 AM

Hi Nikolai! You are right! I am using Hysys V11.

The print screen attached is exactly the example that im working right now.

 

There  i can change the efficiencies but i was wondering about my modifications, if they are realistic or not.



#6 Nikolai T

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Posted 04 November 2019 - 09:08 PM

Hi Max,

 

When you deal with Efficiencies nobody help you. Intensive research and experimental data are needed. Aspentech isn't responsible. They are just programmers, you are just buyer.

 

Regards



#7 Tanhieungo

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Posted 08 December 2019 - 05:19 AM

use rate base option to better




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