9 replies to this topic

[Quimarah]

Hello everyone!

 

Im starting my thesis work about direct hydration of ethylene for the industrial production of ethanol. We based our separation system on a train of distillation columns (3 columns). Then we used glycerol as entrainer in the azeotropic dehydration.

 

The thing is that this columns are conected from the top (which is uncommon in the industry).

Our tutor suggested that we implement a multiple effect evaporation due to the large amount of water. 

 

Is this possible in our process? How is the right way to approach this change?

We are using ASPEN HYSYS v8 for the simulation.

Thanks in advance

Evelyn

 

 

[breizh]

Hi,

Can you share with us a simple PFD to better visualize your process?

Breizh

[Quimarah]

Hello! yes!

This is the train of distillation columns.

 

Attached Files

•  Captura.PNG   41.25KB   1 downloads

[breizh]

Hi,

Thanks for sharing this document. I was expecting a simplified process schematic where we can see the evaporators. 

Anyway, I've attached a few documents about Multiple effects evaporators and MVR technology.

Hope this helps you.

Probably others can help you on Aspen and process parts.

Breizh

[Quimarah]

Thank you!

[shvet1]

 which is uncommon in the industry 

 

a disputable point

 

 Is this possible in our process?  

 

yes, it is

 

 How is the right way to approach this change? 

 

To model possible options and choose one having best investment return rate. Easy and fast way for first approach to process development.

v12+ is recommended as it provides built-in features for capex and opex assessment.

Edited by shvet1, 18 July 2023 - 12:30 AM.

[Quimarah]

Thank you for your answer shvet1. Is this process of multi-effect evaporation in the model pallete or do we have to simulate in other ways?

[shvet1]

 Is this process of multi-effect evaporation in the model pallete or do we have to simulate in other ways?

 

I did not understand.

[breizh]

Hi,

Let you Google: multiple effects evaporators model aspen

you will find examples , combination of heaters, separators , mixers .

https://core.ac.uk/d...f/163104933.pdf

Similarly RMV is one heater , one separator and one compressor and mixers.

Good luck

Breizh 

[Quimarah]

Thank you for your help!