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npk fertilizer production line

The working principle of the disc granulator in the fertilizer production line

Written by fertilizer production line on .

The disc granulator machine is mainly used in the NPK fertilizer production line and organic fertilizer production line to produce various granular products; it’s also used in pharmaceutical products, fertilizers, feeds, etc. Adopting the overall arc structure, the granulation rate can reach above 93%. The granulation tray has three discharge ports, which facilitates intermittent production operations, greatly reduces labor intensity and improves labor efficiency.

disc granulator machine

Disc fertilizer granulator machine working principle:
The raw meal powder is uniformly wetted by the atomized water in the mixer to form a spherical core having a uniform particle size, and then fed into a ball plate for ball formation. The moisture of the ball should be controlled at 12-14%. Most of the water should be added in the twin-shaft mixer. Only a small amount of supplementary water is added to the ball plate, and the amount of water added is controlled to be about 0 to 3%. The dry powder granulation is directly added to the ball-forming plate, and the proper amount of water is sprayed. The raw material nucleus enters the spherical disk and is subjected to centrifugal force, friction and gravity in the disk, and moves along the parabola. Due to the cohesiveness and plasticity of the material, the cores are bonded to each other and gradually grow up during the movement. When the inclination angle of the ball disc, the height of the disc edge, the rotation speed and the moisture are constant, the balls of different particle sizes roll downward from the edge of the disc at different disengagement angles due to different gravity. During the continuous rolling process, the ball continuously discharges the water in the ball out of the surface. Due to the cohesiveness of the material and the natural volatilization of the surface liquid film, the ball has certain strength, and then the disk is rotated with the tilting of the disk. The sides are discharged out of the pan.

Disc granulator performance advantages:
1. The raw materials are suitable for a wide range of applications. They can be used for granulation of various raw materials such as compound fertilizer, medicine, chemical feed, coal, metallurgy, etc., and can produce various concentrations and various types (including organic fertilizer, inorganic fertilizer, and magnetic fertilizer etc.) of compound fertilizer.
2. The disc granulator is light in weight, low in height, and flexible in process;
3. The machine has simple structure, convenient adjustment and superior performance.
4. The use of unique unpowered combination scraper integration reduces auxiliary power consumption.

5, high ball formation rate, large rounded particle strength, intuitive operation, easy maintenance and so on.

Fertilizer granulator machine is the core equipment for fertilizer manufacturing process. As one of leading fertilizer machine manufacturers in China, in addition to the disc granulator, we also produce other types of fertilizer granulator machines, and other equipment such as compost turning machines, mixer machine, crusher machine, etc.

npk fertilizer production line

Simple NPK compound fertilizer disc granulation production process

Written by fertilizer production line on .
NPK compound fertilizer disc granulation production process flow:
1. Transport qualified raw materials such as nitrogen, phosphorus, potassium and filler to relevant weighing equipment.
2. After weighing, the raw materials are conveyed to the mixer and evenly stirred by strong force.
3. Material is transported to the uniform feeder and evenly added to the rotating disc of the disc granulator; appropriate amount of water is sprayed on the material of the disc through the liquid spraying device of the disc granulator to satisfy the moisture required for the granulation of powder. The rotating disc and the edge of the disc exert friction and centrifugal action on the material to produce the material. The circumferential movement makes the powder particles knead and squeeze each other, and gradually reunite into balls. Because of the difference of particle mass, the gravitational and centrifugal effects are also different. When the gravitational and centrifugal effects of particles increase enough to overcome the friction between particles, they will be thrown out of the disk, and smaller particles will remain in the disk and continue to accumulate fine particles.
NPK compound fertilizer disc granulation production process
4. NPK fertilizer particles are transported to rotary dryer for heat exchange with heat from hot blast stove.
5. Particles are transported to rotary cooler to cool fertilizers by natural or forced cooling air.
6. Fertilizer is transported to the screening machine, and the unqualified fine particles are directly returned to the NPK fertilizer production line for reuse, and the large particles are crushed by the crusher and then returned to the material equalizer.
7. The qualified products after screening are transported to the coating machine for coating treatment.
8. Qualified fertilizer is transported to full-automatic packaging scale for weighing, packaging and storage.
9. Drying, cooling and workshop dust are discharged after being treated by cyclone dust collector, labyrinth dust chamber and wet scrubbing.

Disc fertilizer granulator has the following advantages in compound fertilizer production process
1. The disc granulator can operate intuitively and keep abreast of the operation of the equipment at any time. If abnormal is found, it can be adjusted in time.
2 The size of the particles is determined by the inclination and rotation speed of the disc, and the inclination and rotation speed of the disc can be adjusted. Therefore, the disc granulation process has a wide control range of particle size, strong adaptability, and a very high sphericity rate. It reaches 70%~90%.
3 Disc granulation process has short production process, simple structure, low investment and easy operation. It is suitable for small and medium-sized enterprises.
4 The raw materials of this process have wide adaptability: urea, ammonium chloride, ammonium sulfate, ammonium carbonate and so on. Phosphorus sources are: calcium, heavy calcium, monoammonium phosphate, diammonium phosphate, calcium magnesium phosphate fertilizer and so on. Potassium sources include potassium chloride and potassium sulfate.
5 Compound fertilizer product varieties: can produce nitrogen, phosphorus, potassium nutrients from 20 to 48% content of inorganic compound fertilizer, organic fertilizer, organic (inorganic) compound fertilizer, bio-organic fertilizer and other products.