Month: February 2021

Disc VS Drum Granulation in NPK Plant

Zhengzhou SX heavy industry compound fertilizer equipment has a complete set of fertilizer granulators, such as disc granulator, drum granulator, roller granulator and rotary coating machine, which are well received by users

Pan Granulator
Pan Granulator

The disc granulator of compound fertilizer equipment adopts the overall arc structure, and the granulation rate is more than 85%. The main body of the disc granulator is equipped with three discharge outlets, which is convenient for intermittent production operation, greatly reduces the labor intensity and improves the labor efficiency.

The machine and motor are driven by flexible belt. The belt starts smoothly, which reduces the impact of the buffer and prolongs the service life of the equipment. Disc granulation the bottom of the disc is reinforced by a number of radiant steel plates, which is durable and never deformed. The base of disc granulator of compound fertilizer equipment is designed to be thicker, heavier and firmer, without anchor bolts, and runs smoothly; the gear of main machine is quenched with high frequency, and its service life is doubled.

Compound fertilizer equipment disc granulator is widely used in powder, materials or small pieces of various non viscous materials. It can be used for granulation of compound fertilizer, medicine, chemical industry, feed, coal, metallurgy and other raw materials. Uniform granulation, high granulation rate, stable operation, strong equipment, long service life and other advantages.

Drum granulator is one of the key granulating equipment of compound fertilizer equipment, which is suitable for cold, hot granulation and large-scale production of high, medium and low concentration compound fertilizer. The main working method is wet granulation of agglomerates. After adjusting the humidity, the basic fertilizer will have a complete chemical reaction in the cylinder body through a certain amount of water or steam. Under certain liquid phase conditions, the rotation of the cylinder can make the material particles produce extrusion force and agglomerate into balls again.

Drum Compound Fertilizer Granulation Equipment Selection

The production process of compound fertilizer and NPK fertilizer is inseparable from the drum granulator. In the last article, we mentioned the use of drum granulation compound fertilizer equipment. Let’s review the working principle of drum granulator.

Drum granulation equipment is mainly composed of drum, front support wheel, rear support wheel, big gear, reducer, motor, etc. The inner part is composed of granulation area, feed area, steam nozzle and annular ring. When working, powdery raw materials and returned raw materials are added from the feeding port, and the rotating roller rotates upward with the animal material layer.

Drum Granulation Line for Compound Fertilizer Equipment
Drum Granulation Line for Compound Fertilizer Equipment

When it reaches a certain height, the material will fall along the arc track under the action of gravity and inertial force. Steam or water is injected into the cylinder and then sprayed on the rolling material layer to condense the material into particles. There are many problems in the use of drum granulation compound fertilizer production line. For example, the lining of the drum granulation equipment needs frequent maintenance at high temperature, and there is material agglomeration on the inner wall of the granulation equipment in the drum granulation equipment. How to solve these problems? Let’s take a look at today’s focus, drum granulation compound fertilizer production equipment transformation.

The purpose of technical transformation of drum granulator fertilizer production equipment is to provide a granulator with non sticky inner wall and elastic adjustment of the position of the retaining ring, so as to achieve balanced and stable load, so as to produce high-quality compound fertilizer and adapt to the changes of high, medium and low concentration compound fertilizer types.

After years of research and test, Zhengzhou SX compound fertilizer equipment manufacturer found that chloroprene rubber was used as lining of pelletizing equipment. During operation, when the material reaches the lowest point through the cylinder, the weight of the material will be the difference between the rubber film and the cylinder wall. The indoor air is discharged from the granulation tube with breathing hole, which is the largest contact area between materials. When the material moves to a certain height with the roller, the material will fall and roll under the action of gravity and pressure, and the material will hardly adhere to the film. This fundamentally solves the problem that the material adheres to the inner wall and scabs, and the particle size of the material is uniform and beautiful.