A continuous vibro
fluidized bed roaster for
roasting cereals, pulses, spices, oil seeds and ready-to-eat
snack foods using
flue gas, said roaster comprises of a main frame (4) which houses all the parts of the
machine, the vibrating
deck (1) is mounted on a set of coil springs (6) which is mounted on the main frame through screw fasteners, a perforated
sieve (3) and a hood (2) are mounted on the vibrating
deck (1) with rubber
gasket (17) for sealing the hot air from leakage, a vibratory motor (10) is mounted on the feed end of the vibratory
deck for imparting vibrations to the feed material, a vibratory feeder (11) is mounted on the feed side of the vibratory deck (1) for feeding the
raw material in to the roaster through a hopper (20). A LPG burner (8) is fastened to the
combustion chamber (7) using fasteners, a
solenoid valve (14) mounted on the main frame (4) for regulating the LPG supply to the burner and also to close the LPG supply incase of electrical power failure with a
signal for
flame failure from the photo sensor (15), a blower (9) generates the air needed for the reducing the
flue temperature is mounted at the end of the on the vibratory feeder (11) on to the main frame (4), a return duct (19) connects the hood (2) and the suction end of the blower (9), a temperature indicator is (21) is used for measuring the
inlet temperature of the hot air admitted in to the roaster, an electrical panel (16) is mounted at the end of the main frame for housing all the required electrical controls and variable speed drive (13) for varying the
residence time of travel of the
raw material, a rheostat (12) for varying the feed rate of the
raw material fed in to the vibrating deck, the roaster is covered by a set of covers (18) on all its sides, the complete
machine is mounted on a set of castor wheels (5) for easy movement of the roaster to the required place, the materials of construction of the roaster are preferably of stainless steel but this shall not
restrict the use of other materials as well.