7 replies to this topic

[mbsahg]

Hello~

 

Firstly, I can't speak English well.^^

 

I am simulated about 'Vacuum column'

The simulation condition is under,

 

1) Feed: AR(Atmospheric residue)

2) Product

 a) Off-gas

  LVGO(Light vacuum gas oil)

 c) HVGO(Heavy vacuum gas oil)

 d) VR(Vacuum risidue)

 

I don't know properties about LVGO & HVGO.(in order to simulate)

I want to know general properties(like to TBP range) in order to simulate.  

And I am simulated 'Vacuum column" shortcut model.

 

Please help me.

Thank you for read message. 

Edited by mbsahg, 12 January 2014 - 07:41 PM.

[PingPong]

You first need to define the AR feed and cut it in many pseudofractions.

 

The LVGO and HVGO products are whatever you want (or need) to produce: what are both these streams going to be used for in downstream units?

 

What is the purpose of your simulation: just for education, or for actual operating unit?

[mbsahg]

Dear PingPong

 

Thank you for your reply.

I'm had TBP data of AR. and the purpose of process is VR that is to use in 'Asphalt plant'.

Also, i want good yield of LVGO & HVGO.

I am tried to make 'Shortcut model' by PRO/II. 

But i'm failed  to realize the shortcut.

 

 

Thank you for read message.

[PingPong]

Forget the shortcut.

 

In the 30 years that I do simulations I have never used any shortcut methods for any columns. For a vacuum column with sidedraws I cannot even imagine that it would produce any useful data. Wast of time and energy in my opinion.

 

You have the TBP of the AR feed, so that is fine.

As a first trial use a TBP cutpoint of 565 ^oC (1050 ^oF) between HVGO and VR.

If the LVGO and HVGO will be mixed and sent to the same destination then the TBP cutpoint between them is not important but should be optimised in view of the two PumpAround duties and their use in a heat integration, or steam generation, or whatever.

As a first trial use a TBP cutpoint of 455 ^oC (850 ^oF) between LVGO and HVGO.

 

Use 2 theoretical stages for the LVGO PA section

Use also 2 theoretical stages for the HVGO PA section

Use 3 or 4 theoretical stages for the wash section between HVGO and column feed

Use 2 theoretical stages for the stripping section

 

Once you have a converged solution you can vary stages, TBP cutpoints, whatever, to optimise.

[mbsahg]

Thank you ~^^

 

I am trying 'Vacuum distillation' simulation from your comment.

After i am simulation, I am want your help.^^

[mbsahg]

I am trying to simulation for vacuum column.

But i am not solving it.

I think that i am entered wrong input data(specification & variable) in simulator.

I want to attach simulation file(PRO/II) because I have your help.

But i don't know how to attach file.

[PingPong]

When you are logged in you will see under the Reply window a grey button [More Reply Options].

Press that button and under in the new screen you can upload files.

[krazykutie]

test