4 replies to this topic

[Ailia]

Hi,

 

I want to simulate a sour water stripper to remove H2S only from produced water. My stripped water specs are not stringent. I simulated the case in Unisim using Sour Peng Robinson property package. I used a simple absorber unit operation and stripped the water with available fuel gas without adding any heat. The column converged and shows satisfactory results. 

 

My question is that are there actual sour water strippers without using heat input (reboiled or steam stripped)? 

Will simple cold fuel gas stripping reduce the amount of H2S in water?

 

Thanks

[Pilesar]

'Yes' to both your questions.

[Ailia]

Thanks for the reply Pilesar.

 

My plant's sour water is stinking the open API separator area. Is there some info that tells me how low should be H2S content in water to stop smelling?

[Technical Bard]

H2S has an odour at sub-ppm levels in air.  A hot sour water stripper might get the concentration in the water down to 20 or 30 ppmw, and it will still exert a partial pressure (very difficult to make stripped sour water not smell).

 

Adding a chemical to either shift the pH up (shifting the H2S to sulfide ions), for instance, caustic (NaOH), or adding an oxidizer (H2O2) to turn sulfides to sulfates. will stop the smells.

[Ailia]

Thanks a million

This is what I was looking for