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[kito-818]

I work in an aluminum extrusion plant. We heat up logs, cut them, push them through a die and ship the finished product.  The die is then put through a sodium hydroxide and water bath to remove the remaining aluminum, and the die is further tended to before going back into use.  Meanwhile, I end up with that waste sodium hydroxide water (PH 13.7), I mix it with sulfuric acid (>93%) to balance the PH and then a pump truck takes it away.  This is a basic framework of what I'm dealing with.  As for how, we have a pit, that's important, 7ft by 20ft square about 7ft of water before it starts coming up from the floor and drains leading to this pit.  We are currently using a submersible pump to recirculate the water through 2in schedule 80 PVC, and this is the source of my problems.  I'm becoming more and more limited for WHEN I can treat water, but then have very limited time for treating water, which means I have to treat large quantities quickly.  Faster treatment more heat, more heat more problems with the submersible pump and supporting piping.  I've discussed redesigning the system to use a non-submersible pump to draw the water up and recirculate it, and everyone is okay with that, but I'm left holding the bag on that redesign.  I need help selecting the right kind of pump to pull water up from a pit rather than having the gravity pressure of a supported, or even ground level tank, but it needs to be able to handle the corrosive chemicals and water temperatures of 150F.  I need help selecting the right pump for the task and I'm running into the issue of not knowing what I don't know.  I'm not really worried about brands, I can do the research on that once I know what kind of pump to look for, but centrifugal pumps seem to need positive pressure at the inlet, well pumps don't seem to be up to the flow rate I would need, on top of probably not being very happy with the chemicals, and I really want to stop dealing with the submersible pump issues.

[breizh]

Hi,

You may want to talk to those guys (Chinese supplier) :

Self-priming fluorine lined chemical magnetic drive pump QBFZ

 

Breizh