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Intelligentized on-line control system
Operation of Powder Granulation adopts on-line control technique. It can conveniently and visually set working parameters, online testing and controlling the operation state of the equipment, and provide real time determination information to the control personnel. With its help, our roller press pelletizer works more stably.
Unit structure
1) Pre-feeder: Equipped with mechanical vibrating feed hopper with automatic control and timing vibration
2) Quantitative feeder: Adopts frequency conversion adjusting speed to ensure the feeding accuracy.
3) Force-feeding screw hopper: It is composed of variable frequency motor, cone helix, stirring knife tooth and cone feeding hopper with visual glass window as well as feeding mouth assemblies and so on. Its function is to further achieve degassing and perform pressure feeding.
4) Slice mill: The mainframe of the slice mill is composed of left and right fixed bearing seats, frame structure, two alloy steel rollers, two hydraulic oil cylinders, electric automatic pump station as well as hard tooth surface dedicated reducer and main driving motor.
5) Breaking and pellet dressing machine: The breaking and pellet dressing chamber is composed of cutting-up box, cutting-up main shaft and special rotating cutting blades and the main shaft is driven at high speed by the motor to break the extrusion forming materials and dress into pellets.
6) Vibration classification screen: It is equipped with screen block-proof device and convenient to clean the screen. The broken pellet and powder materials from the breaking and dressing machine is divided into pellet product and recycling powder.
7) Material return screw: It sends the unaccepted powder material returned from vibration classification screen to the feeding elevator.
8) Bucket elevator: HL250 Type, used for feeding materials.
9) Electric control cabinet: It is composed of the electrical components such as electric control box, frequency conversion controller, ammeter, voltage meter, light, button switches, voltage switch and so on. All the electrical equipment is controlled and operated concentratedly.
Granulation production line(single set):
Final products:
Working Principle
Raw materials are sent into hopper by quantitative feeder , compactors use the pair of roller with the hole roll, leaving certain gap and rotation with the same speed reversely. Shaft holders of one group of rolls are fixed, and the other one of group can slide to help the hydraulic cylinder press the rolls for abutting closely against each other. Many arc grooves with the same shape and size are arrayed regularly on the roll surface. In accordance with different compressing ratios of target materials, the wave trough of arc groove of one roll shall be directed at that of one roll. When two rolls parallel each other horizontally, powder grained materials are, continuously and evenly fed in the gap between two rolls by means of their gravities and through a forced charger from above of two rolls. After entering the nip area, the materials are gradually nipped by the rolls. With continuous rotation of the rolls, the space that the materials occupy reduces gradually and is compressed step by step and reaches the maximum shaping pressure. And then, as the pressure reduces gradually later, pressed blocks drop off the arc grooves of the rolls for recovered elasticity and gravity of the flaking machine and enter a crushing device for crushing and then enter a sieving device for sieving. At last, grained products are obtained. The powder materials and large particles which are substandard will return to bucket elevator and enter into the next process with new products.
Clients Installation Site
Double Dry roller pressing granulator