Sodium hydrogen carbonate is used
in the chemicals and pharmaceutical industries as a component
in baking powder and pharmaceutical products, as a fire
extinguishing agent and for neutralisation processes.
Sodium hydrogen carbonate is also often used in particle
sizes ranging between d50
19 and 25 µm to neutralise the acidic components
during flue gas desulphurisation.
The system shown below was designed and delivered for processing
sodium hydrogen carbonate. The problem specification was as
follows:
Feed size: < 2 mm
System throughput rate: approx. 200 kg/h
End-product fineness: d50
19 – 25 µm
1
= Feed screw
2 = Powderplex Classifier Mill APP
3 = Rinsing air
4 = Grinding air inlet
5 = Conveying fan
6 = Limestone supply
7 = Sample taking
8 = Control cabinet
A = Product feed sodium hydrogen
carbonate
B = End product (to flue gas channel)
For this task we chose the Alpine
Powderplex Classifier Mill 160 APP. This machine type
is impressive because of the steep particle size distribution
that can be achieved combined with a precise top-size
limitation. Its modular design ensures good accessibility
for cleaning and maintenance.
The performance range of the APP series depending on fineness
and machine size between 200 kg/h and 2.5 t/h.
