DI water cooling tower

[layloban]

I'm wondering if anyone knows what kind of chemicals are needed for a cooling tower (Assuming that the cooling tower is upgraded to handle corrsion problem) that uses DI water instead of raw water. What would the blowdown rate be? Thanks a lot!

 

[unclesyd]

Yor best bet would be get with a CTW chemical supplier and discuss you situation with him. He ins't hardly going to know what to do with DI make up water. Watch out for the over sell get a couple of proposals.

A lot depends on you system layout and what the demands on it are and possible contaminates along with the materials of construction.

 

[quark]

Blowdown rate depends upon your input water quality. When you use makeup water with a TDS below 100ppm you can go from 5 to 6 cycles of concentration. With DI water you can go higher but DI water, instead of helping you to reduce corrosion, it infact increases the rate of corrosion. Just mind that DI water is more hungry for ions. As unclesyd correctly said, have a chemical supplier analyze your system and suggest.

Regards,


Believe it or not : A Neutrino is so mass less(and electrically neutral) that, a conservative estimate states, it can pass through a 50 light year thick lead block.

 

[hacksaw]

use treated water not DI water. otherwise you'd just be asking for trouble as your pumps may not tolerate the associated corrosion mentioned ion the previous response.

 

[unclesyd]

Here is a very good website:

http://www.awt.org/

The article on "white rust" is very informative.
The also have a lot of good links.

 

[dhamo]

Do not use DI water (Deionised water) as this would call for Stainless steel for Material of construction. If the water quality is bad, then you may think of softening the water (Replace hardess with Na ions).

Fix circulating cooling water quality. From the make-up watr quality, you will be able to find out the blowdown rate and make-up rate. Contact the cooling water chemical dosing suppliers for the chemical dosing and they will also advise you the blow down rates.