RE: Sulphuric acid dilution

From: <Al>
Date: Mon Mar 29 2004 - 11:45:00 EST

I understood handling , storage and corrosion was better at the higher 98% conc, than around 75%
my data shows corrosivity rate higher at 75% (givn absence of addition of water) for handling

-----Original Message-----
From: Steve McKenzie [mailto:mechproj@xtra.co.nz] Sent: Monday, March 29, 2004 3:08 AM
To: PipingDesign@yahoogroups.com
Subject: [PipingDesign] Sulphuric acid dilution

Hi Guys

I am looking at a pH correction system for a wastewater treatment plant. Occasional alkaline "event" inflows require an acid dosing /pH correction system to be installed to keep the downstream bio-systems alive and well.
At present the inflow is around 70l/s minimum. I will need to dose at about 10cc/sec based on 98% H2SO4, although for handling reasons this will probably be changed to around 75%.
I envisage "dribbling" the acid into the inflow through a plastic quill with no special arrangement made for mixing or heat dissipation. However some detail design will be required to validate this approach. Before I commence the detail design of the mixing area, I thought it may save some time by asking if any of you guys have done this, what works, what doesnt etc.

Thanks

Steve

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Yahoo! Groups Links Received on Mon Mar 29 11:45:00 2004