solutions, such as chromium plating, produce lot
of heat during plating, which raises the temperature
of plating tank above the acceptable limits. This
solution must be cooled down to produce acceptable
deposits at optimum temprature. This heat released
in the plating process (Which otherwise is wasted)
can be utilised to supply heat energy required
for recovered chrome solution evaporation thus
resulting in a lot of energy saving.
The Chromic Acid, recovered from the Chrome Recovery
System has a strength of about 50 g/l Chromic
Acid. It needs to be concentrated upto 200 g/l
for addition into the main plating tank. For this,
a Chrome Evaporator, which is most energy efficient
It operates in relation to the principle of evaporation.
The hot solution is sprayed from the top of the
column and drops down through a packed column
i nthe reservoir tank. Air is blown from the bottom
and an exist, gets saturated with water vapours.
A demister is also provided to seperate droplets
from the air flown out.
The evaporator consists of a PVC lined column
with 10ft height and 16" dia, fitted with
blower, a chrome reservoir connected to a Stainless
Steel Pump and a suitable heating system. The
feed temp. is 60° C max. and evaporation in
the tower is carried out at ambient pressure.
All dosing valves and fitting will be provided.
The estimated evaporation capacity of the above
unit is 20 to 25 Ltr. Per hours depending upon
solution temperature and moisture of the air.