Equipment process and granulation characteristics of dry powder roller extrusion granulator
2023/06/29
The dry powder double roller extrusion granulator is mainly used to press the powder materials which are difficult to form. It is characterized by large forming pressure, adjustable rotation of the main machine, and equipped with screw feeding device.
The main machine of the dry powder double roller extrusion granulator is powered by the electromagnetic speed regulating motor, which is transmitted to the driving shaft through the belt pulley, the cylindrical gear reducer and the bar pin coupling. The driving shaft and the passive shaft of the organic fertilizer granulator are ensured to run synchronously through the open gear. A hydraulic device is arranged behind the passive bearing seat.
The screw feeding device of the dry powder double roller extrusion granulator is driven by the electromagnetic speed regulating motor, and is rotated by the belt pulley and worm reducer to force the pressed material into the main feeding port. Because of the constant torque characteristic of the electromagnetic speed regulating motor, when the pressing amount of the screw feeder is equal to that of the main machine, the constant feeding pressure can be maintained to stabilize the pellet quality. In the fertilizer production line, if the feeding quantity is too large, the electric overload of the feeding device will occur; if the feeding quantity is too small, it will not form a ball. Therefore, skilled operation technology is an important condition to ensure the normal operation of the pressure ball.
The hydraulic protection device is driven by the hydraulic pump into the hydraulic cylinder to make the piston produce axial displacement. The front connecting head of the piston rod is on the bearing seat to meet the production pressure requirements. When there is too much feeding between the two rollers or metal block, the piston rod of the hydraulic cylinder is pressed and overloaded, the hydraulic pump will stop, the accumulator will buffer the pressure change, the overflow valve will open the oil return, the piston rod displacement will increase the gap between the rollers, so that the hard objects pass through the rollers, the system pressure will be restored to normal, which can protect the rollers from damage. This organic fertilizer granulator can adjust the pressure according to the requirement of the pressure ball density, and the production is flexible.
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