Typical Plating or Galvanizing Line Using
PRO • pHx Technology and Simple Filtration Systems
For Zero Discharge of Acid and Rinses.
Filtration
The acid and hot water tanks will each have their own in-tank filtration.
They will all be initially set up with 5 or10-micron cartridges.
The three ambient rinses will be sent to the rinse water holding
tank where they will be automatically neutralized to the 7.5 - 8.5
pH range with sodium hydroxide. The neutralized rinse water will
then pass thru a 10-20 micron filter, as it is recycled back to
the rinse tanks.
If you are running a zinc plating line you can segregate your different
color chromate rinses. Simply use filtration like in the hot water
and acid tank examples with a 10-micron filter in trivalent rinses
and a 5-micron filter in Hexavalent rinses.
ITF = In Tank Filtration
The filter input and output lines will reside within the tank
as with a Flo-King filter system.
F = Standard Filtration
Use the type of filter best suited for your system. The intake
line will reside within the pH adjustment tank and the output
line will return to the rinse tanks. This filter may be internal
or external to the pH adjustment tank.
PRO • pHx Additive and Maintenance
The PRO • pHx make up will be added at 1.0% of the volume of the
acid and rinse tanks respectively. The acid tank will be titrated
twice weekly and acid will be added as required to maintain the
optimum concentration. Whenever acid is added, PRO • pHx must also
be added at 1.0% of the acid addition volume. Take care not to drag
large amounts of water into the acid solution, so as to dilute the
acid and PRO • pHx mix, and not have room for further additions of
each.
The PRO • pHx make up will be added at 1.0% of the volume of the
ambient and hot water rinse tanks. Future additions will be done
at 0.25% of tank volume when water clarity begins to decrease. These
additions of PRO • pHx should be extremely rare, but sodium hydroxide
should be used daily to keep the water in the 7-8 pH range at all
times.
The simple set up on the cleaner tank will extend the standard
expected bath life significantly. Many other possibilities to extend
cleaner bath life are available depending on the bath life desired
and the budgeted funds that are available.
The five (5) 600-gallon tanks and the one (1) 300-gallon tank will
total 3,300 gallons. Thirty-three (33) gallons of PRO • pHx will be
required for the initial 1.0% makeup. With normal production requirements,
your PRO • pHx use should be approximately 0.75 gallons total per
month in the ambient rinses and 0.10 gallons total per month in
the hot water final rinse. The pickling acid should require approximately
0.33 gallons of PRO • pHx per month to maintain.
All of the PRO • pHx use approximations are for heavy
rack production of 172 hours per month. The calculations are based
on 2.5 years of actual shop use at Amplate, Inc. Contact: David
French 704-607-0191
Next
|
