Pulse mill (dal mill) is an
important machine for processing pulses like pea, gram, lentil after
they are harvested. Pulse mill dehusk and split these grains and make
them suitable for consumption. Pulses, before they are milled are soaked
in water and dried in sun and then are fed into the unit for milling.
Milling process
Operated by electric motor, pulse mill consists of emery or corundum
rollers, hopper where pulse or dal is feeded, and pulse outlet. Some
mill consists of a steel and a rubber discs between which the grains are
fed to obtain pulses. By giving space between the rollers and by
replacing the rubber discs with a steel disc, grits are produced out of
pulses. The adjustment between the clearance also helps in obtaining
good quantity of dehusked split pulses. There are different outlets for
obtaining splitted pulses, husks, and powdering materials.
Depending upon the nature of the work and the machine used pulse mill
can be categorized into following parts :
- Semi automatic mini pulse mill
Semi automatic mini pulse mill is other type of pulse mill for
dehusking and splitting pulses. It consists of dehusking unit, an
aspirator assembly, and system for sieving. All the units are
combined in such a manner that splitting and dehusking takes place
simultaneously. Inverted emery is used for dehusking, whereas hopper
is provided for the smooth flow of the pulses into the machine.
There is a suction blower to suck the husk and the dust which are
discharged to an outlet into the bag.
- Mini pulse mill
In mini pulse mill there is a feed hopper at the top of the unit
for feeding the grains into the system. There are two discs which
split the pulses into two halves. For splitting dal the rotating
discs should be of cast steel where the other disc which is made up
of rubber should be stationary.
