 |
McKINNON
Dry Destoners are used for removing stones from green coffee,
dry parchment or dry cherry. The Destoner is designed to take advantage
of the difference in specific weights between the stones and the
coffee. The incoming coffee is fed into an inclined sifting
frame fitted with a special screen, which is exposed to a controllable
air exhaust. The lighter fraction, consisting of good coffee, forms
a fluid layer above the sieve and flows over to the outlet while
the heavier stones contacting the screens move upslope by the frame
vibration. The sieve frame is vibrated through the use of a vibratory
motor.
|
 |
|
|
The machine
has an input feed regulation device and an aspiration throat for
connection to a central aspiration line or to an individual aspiration
line with fan, cyclone, airlocks and piping. The vacuum above the
sieve can be adjusted by a butterfly control valve and read on a
water gauge tube. Depending upon the input material characteristics,
the feed, aspiration intensity, screen inclination, throw angle
setting and vibration amplitude can be adjusted for optimum results.
|