Rotary drum granulator and disc granulator are two kinds of granulator commonly used in fertilizer production industry. What are the differences between them?
The rotary drum granulator
is one of the key equipment in the fertilizer production process, which is suitable for cold and hot granulation and large-scale production of high, medium and low concentration compound fertilizer. The main working mode is wet granulation of pellets. Through a certain amount of water or steam, the basic fertilizer can be fully chemically reacted after being humidified in the cylinder. Under a certain liquid phase condition, with the help of the rotating motion of the cylinder, the extrusion pressure between the particles of the material can be generated to agglomerate into a ball.
The main advantages are that the temperature of the granulating material is increased, the water content of the granulation is reduced, the load of the dryer is reduced, and the working efficiency is improved. The granulation rate can reach 90% by using the rotary drum granulator, and the equipment is simple to operate, flexible to work and convenient to maintain.
The cylinder body of the machine adopts UHMWPE lining or acid resistant stainless steel lining plate, which realizes automatic scar removal and tumor removal, cancels the traditional scraper device, eliminates the phenomenon of material sticking to the wall, reduces the labor intensity of the workers, and greatly extends the service life of the equipment. The machine has the characteristics of high ball forming strength, good appearance quality, corrosion resistance, wear resistance, low energy consumption, long service life, convenient operation and maintenance, etc.
The disc granulator
is one of the main equipment for granulating compound fertilizer, organic fertilizer and organic-inorganic fertilizer. The disc angle of the organic fertilizer disc granulator adopts the overall circular arc structure, and the granulation rate can reach more than 95%. The disc pelletizing plate of organic fertilizer is provided with three discharge outlets, which is convenient for intermittent production operation, greatly reducing labor intensity and improving labor efficiency. The reducer and motor of the disc granulator are driven by flexible belt, which can start stably, slow down the impact force and improve the service life of the disc granulator. The plate bottom of the disc granulator is strengthened by multiple radiation steel plates, which is firm and durable and will never deform. The thickened, weighted and solid base design of the disc granulator does not need anchor bolts to fix, and the operation is stable. The main gear of disc granulator is quenched by high frequency, and its service life is doubled. The granulation face plate of disc granulator is lined with high-strength fiberglass, which is anticorrosive and durable. This surface has the advantages of even granulation, high granulation rate, stable operation, solid and durable equipment, long service life, etc.
Advantages: even granulation, low return material, large production capacity.
Disadvantages: the pretreatment of materials cannot be carried out, and the dust and smoke pollution are serious.
Rotary Drum Granulator
Advantages: improve the liquid content of the basic materials by increasing the granulation temperature, and promote the materials to form balls under low water content. It has the advantages of easy drying, energy saving and consumption reduction.
Disadvantages: when the process conditions are not well controlled, the returned material is higher than the disc granulator.