Lime slurrying and pumping
Lime slurrying and pumping
(OP)
I am making up to a 40 wt% lime solution in water by auger feeding 5 tph hydrated lime into a simple mixing tank. The pumps that move the slurry are don't reach their design capacity because of lumps and air entrained in the solution. Can anyone advice me on the most cost-effective means of alleviating this problem (introduce lime subsurface into mixing tank, install delumper, install trap and vent for air, use different type of pump)?
thanks,
PeterAB
thanks,
PeterAB





RE: Lime slurrying and pumping
Many of the lime users along the Texas Gulf Coast have shifted to this because of the problems you describe and problems with getting the hydrated lime out of the storage bins due to our high humidity.
5 tph is an impressive amount of lime use. What are your doing with it?
RE: Lime slurrying and pumping
could this be cavitation, formation of suction vortices in the tank, etc.?
Lime slakers/mixers require special designs in order to be successful. It is not usually just a matter of a screw feeder and a mixing tank...
RE: Lime slurrying and pumping
http://www.discflo.com/index.html
RE: Lime slurrying and pumping
you need a decent agitator in the tank which should be baffled, and shroud the pump suctions.
Our normal practice is to have an auger fed batch mixing tank (with agitator) and an agitated recirculion tank which feeds the users via a ring main. Feeding the lime in slowly prevents lumps.
The most important thing is to keep everything moving - stop anything and you are dead.
Cheers
Steve
RE: Lime slurrying and pumping
PeterAB
RE: Lime slurrying and pumping
It should help you at a resonable cost.
RE: Lime slurrying and pumping
Thanks for providing a fresh solution to the problem.
Could you advise who supplies the dispersant, and how much you need to add?
regards,
Peter AB.