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Acid gas scrubber with wash solution recycle

Acid gas scrubber with wash solution recycle

Acid gas scrubber with wash solution recycle

(OP)
Greetings everyone.

This is my first post here, but let's go straight to business.

I am starting to work for an engineering company and my first project is to design a scrubber to remove HCl and SO2 from tail gas.

The customer wants to use 10% NaOH in water with recycle of the wash solution; liquid flow will be something like 30 times bigger of the stoichometric minimum.

How can I calculate the steady-state concentration of sodium chloride and sodium sulphite in the wash solution?

 

RE: Acid gas scrubber with wash solution recycle

(OP)
No, I don't have Aspen Plus; I'm doing the design without specific software.

But I found a solution in the meantime.

RE: Acid gas scrubber with wash solution recycle

Fabcap,
Would you care to share with us, the forum members you asked for help, what is the solution you found? Perhaps it could be useful to someone else.
Cheers,
gr2vessels

RE: Acid gas scrubber with wash solution recycle

(OP)
It is a simple mass balance. At the steady state, the flow rate of salts with the discarded wash solution must be equal to the production rate by chemical reactions.

Thus, steady-state concentration is controlled by the recirculation ratio.

RE: Acid gas scrubber with wash solution recycle

Really simple. Good one.
Cheers,
gr2vessels

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