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Design And Fabrication Of A Palm Fruit Digester
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1.2 MANUAL DIGESTER
Manual digesters are built with
different shapes and patterns. These is a ways a handle which is used to
turn the palm fruit in the barrel the shaft of the digester is designed
and welded onto with flanges of barrel depending on the size of the
barrel used the operation is efficient but very slow and involve a lot
of human effort for high production. This method of operation can not go
on for industrial use because of its low production rate. Above all
human effort tends to dominate the whole operation manual digesters are
mostly common in industrial African villages and communities where there
is no rural electrification.
1.3 MOTORIZED DIGESTER
Motorized
digesters consist of a machine with a power driver pulley from the
electric motor. The source of power transmission is belt from the driver
(i.e) elector motor pulley to the driven digester pulley. The pulley is
keyed to the shaft which is supported on two ball bearings located on
each end of the shaft. The type of shaft used is the step shaft with the
flanges welded unto the bigger correctional part of the shaft. The
shaft assembly and flanges are enclosed in a barrel which is usually
cylindrical, and the barrel internal surface is about 2cm – 5cm
depending on the verities of palm fruit intended for digestion.
1.4 TYPES OF MOTORIZED DIGESTER
Horizontal
types of the motorized digester are classified depending on the axis of
mounting of the barrel and shaft. The horizontal digester are designed
with shaft and barrel parirel to the horizontal axis and will
incorporate an electric motor that will generate power to the system
that will enable the system to function accordingly the vertical
digester are this type which the axis are built at right angle to the
horizontal axis, the shaft and barrel are positioned in a vertical
direction to work effectively. Most designers prefers this type of
vertically mounted system because of it high efficiency and easy
construction and even good out put in terms of digestion.
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