Acid Mixing and Tube Corrosion

[way]

We need to inject sulfuric acid into the cooling water at one of our power plants. The easiest spot for us to do this is in the pipe right before the water goes to our steam condenser. The distance between the injection point and the condenser is only 5 feet. We are going to be injecting acid at the rate of 2 gpm, and the cooling water is flowing at a rate of approximately 47,000 gpm. The acid will be injected through a quill, and it will be used to keep the pond pH around 8.

We are concerned that the acid will not have time to mix adequately, and that some of the water will be at a low enough pH to actually damage the admiralty brass condenser tubes.

What do you all think? Any help is greatly appreciated.

 

[jatinshah]

u may install a static mixer to enhance the mixing. as for the corrosion while designing one usually should consider the worst case scenario and a suitable moc should be considered. i would seriously look into the possibility of replacing the condenser or giving it extra protection.
all the best,
jatin

 

[kmacey]

I would highly recommend a static mixer. There are many different designs available and the selection will need to be based on the flow, pipe size and available head loss. Call some static mixers manufacturer's to discuss the application. Try TAH, Koch, Kenics, Koflo.

Kevin

 

[aminismaili]

You may install restricted orifice between the
injection point and condenser if static mixture
is not available.

Amin ismaili