5 replies to this topic

[Pedro_Kaiser]

Dear all,

A potential customer for a flare tip (and maybe also the riser) wants to flare a 264.000,00 kg/h stream containing 80% C7H16 equivalent + 20% H2 (mol) @ 268 °C. Generally speaking, what should be a good temperature may I ask them to cool the stream? To 120, 150 °C? It is an estimative proposal I have to submit within this week.

Cooling the stream would result in a cheaper flare tip as volumetric flow would descrease as well it would avoid using more expensive material or protection around piping. I don't think it would be a good idea to work with such high temperature.

I know this question and (its answer) shoud be more specific, but, if you could at least send some thoughts as guidelines I would really appreciate.

Thank you very much in advance.

Pedro Kaiser

Chemical Engineer

Edited by Pedro_Kaiser, 12 June 2023 - 01:40 PM.

[Pilesar]

As a customer I would appreciate being told of the consequences and would like to hear 'Can you reduce the design temperature? These high temperatures will require much more expensive materials and engineering.' The customer may not be aware. They may still say 'no.' If you do not think you can provide a competitive bid for their stated conditions, you can also choose to no-bid or provide a solution assuming lower temperature and noting the exception in your response. The lower cost with the exception compared to other bidders may make the customer look closer at their cost to reduce temperature.

[Pedro_Kaiser]

Thank you very much, Sir! Agree with you!

 

As a customer I would appreciate being told of the consequences and would like to hear 'Can you reduce the design temperature? These high temperatures will require much more expensive materials and engineering.' The customer may not be aware. They may still say 'no.' If you do not think you can provide a competitive bid for their stated conditions, you can also choose to no-bid or provide a solution assuming lower temperature and noting the exception in your response. The lower cost with the exception compared to other bidders may make the customer look closer at their cost to reduce temperature.

[shvet1]

Cooling the stream would result in a cheaper flare tip 

 

Colling the stream would result in a cheaper flare tip and more expensive and less reliable flare system as cooling might become an expensive and complicated option.

 

Let's discuss in details capex and opex of this flare system in the whole.

Edited by shvet1, 14 June 2023 - 08:19 AM.

[Bobby Strain]

You should respond with a proposal that meets the requirements. There will be lots more discussion to follow.

 

Bobby

[breizh]

Hi,

Consider this link to support your work.

https://www.iaeng.or...pp1500-1504.pdf

Breizh