RE: Commissioning Activities

Hello Rakesh

You are quite correct. Dosing them separately would be fine, but note the ffg conditions.

I am not sure what state the chlorine is in, perhaps its liquid, (some big systems use gas, got to take care here.) If it is a liquid, usually sodium hypochlorite comes at a concentration of 12%. This is often dosed to obtain a residual in the cooling water circuit of 0.2 - 0.5 PPM.
The H2So4 comes in conc. of max. 98%. I am not sure if you are obtaining a 98% or a diluted form.
In any event, if both chemicals are added separately, and all care engineered that they do not mix in their "supplied" state, it should be perfectly acceptable.

I used to use hydrochloric acid in my swimming pool to get the pH below 7.8. The pool always had a minimum chlorine residual of 0.2 PPM. Its quite safe. One could drink it if one liked.

Ahmed Vawda
Process Engineer
Al Khaleej Sugar - Dubai

-----Original Message-----
From: RAKESH PATIL [mailto:rpa@epc.ltindia.com] Sent: Wednesday, March 20, 2002 5:17 PM
To: avawda@aksugar.co.ae; PipingDesign@yahoogroups.com Subject: RE: [PipingDesign] Commissioning Activities

• High Priority **

Dear Mr Ahmed Vawda,

As you have mentioned that mixing of chlorine and H2So4 is not advisable for system, then what should be done if the pH value of water goes beyond the desirable reqmnt of system and at same time chlorine percentage get reduced in the system?

As per reqmnt we have to reduce the pH by dosing H2So4 Acid in water and at same time we may require to maintain the percentage of Chlorine in water to restrict the biological growth in water. But while dosing both in water if one dose them separately then there should not be any harm. if it is harmful then what should be the solution for it? Pls suggest.

regards,
rakesh

>>> avawda@aksugar.co.ae 03/20/02 11:06am >>>
Received on Wed Mar 20 08:46:00 2002