1 reply to this topic

[RaniellaBianca]

Hello! 

 

I'm currently designing an ammonia absorption tower. The absorbent will be brine solution. I'm just wondering if I can apply physical design methods? Based on what I've read from Perry's Handbook, physical design methods can be applied if the liquid-phase reaction is extremely fast and the gas-phase resistance governs the rate of absorption. It was mentioned that NH3-H2O system can be designed as such. However in my case, NaCl is also present in the system. Will it be okay if I use the physical design method?  I did read in one journal that the salting out effect is small, but I'd like to here out some opinions before proceeding. Thank you!

 

 

 

[breizh]

Hi Raniella ,

I remember doing some calculation about this process when I was in charge of Soda ash production 20 years ago, unfortunatelly I cannot find the document .Upper part two  or three trays with caps and bottom part Ceramic rings.

What comes to my mind is the heat generated during the absorption of Nh3,  with brine , coming from the distillation tower converting NH4 to NH3 with lime  and the need to cool the ammoniated brine and recycle it to get a good contact between phases. If I'm right the concentration of Nh3 is about 80 g/l .

 

long time ago !

 

Most probably physical design method.

 

good luck.

 

Breizh

Edited by breizh, 21 November 2016 - 03:25 AM.