Cooling the Lignin in the weat straw

[zamu2010]

Hi Folks,
I am looking into cooling the discharge stream from a Bio-Reactor containg 30% lignin at 150 C and 5 bar a pressure.
It is supposed to be cool-down to 70 C.
Does any one have idea to cool it down?
Lignin fration seems more problematic.
Any standard practice?
Thanks in advance for your input on the issue.
Best Regards
Zahid Mushtaq

 

[Japher]

Flash it.

 

[zamu2010]

Hi Japher,
Thanks for your reply.
I considered flashing at 0.8 bar a. but creating the vaccum turn out a big problem.
Any recomendation?
Best Regards
Zahid

 

[StoneCold]

Why not flash it to atmospheric, that will get you down to 100C and then blend in cold water to get you to 70C?

 

[zamu2010]

Thanks for your reply StoneCold.
The amount of water is too high and require too much heat to evaporate this water in the final processes!!!