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What are the characteristics of the drum granulator?


The drum granulator is a molding machine that can manufacture materials into specific shapes. The drum granulator is one of the key equipment in the NPK fertilizer manufacturing process, which is suitable for the large-scale production of cold and hot granulation and high-, medium- and low-concentration compound fertilizers. The main working method is wet granulation of agglomerates. Through a certain amount of water or steam, the basic fertilizer is fully chemically reacted in the cylinder after the humidity is adjusted. Under a certain liquid phase condition, the rotation of the cylinder can make the material particles Produce squeezing force to reunite into balls.

The barrel of the machine adopts a special rubber plate lining or acid-resistant stainless steel lining plate, which realizes automatic scar removal and tumor removal, eliminating the traditional scraper device. This machine has the characteristics of high ball strength, good appearance quality, corrosion resistance, abrasion resistance, low energy consumption, long service life, and convenient operation and maintenance.

Rotary drum granulator, in which steam, gas ammonia or phosphoric acid or nitrogen solution, phosphorous ammonia slurry, heavy calcium slurry are added to the machine to complete the chemical reaction and heat supply compound fertilizer granulation process; or The cold granulation process of NPK fertilizer production supplemented with a small amount of water. The material to be granulated is passed through the rotating movement of the cylinder, and the cylinder rotates when there is no material. Under a certain humidity and temperature, it adheres and aggregates into balls to complete the ball making process.

Features of drum granulator:

1. The ball formation rate is up to 70%, there is a small amount of returned material, the particle size of the returned material is small, and it can be re-granulated;

2. Steam heating can increase the temperature of the material, so that the material has a low moisture content and improve the drying efficiency;

3. Use rubber engineering plastics as the inner lining, the raw materials are not easy to stick to the cylinder, and have the effect of anti-corrosion and heat preservation;

4. Large output, low power consumption and low maintenance cost.

Overview of the structure of the drum granulator in the NPK fertilizer production line:

1. Bracket part

The rotating part of the whole machine body is supported by the bracket and bears great force. Therefore, the supporting wheel frame part of the machine is welded by medium carbon steel plate and channel steel, and has passed strict quality control and special process requirements, which has reached the original the purpose of the machine. In addition, the more important thing is the support wheel fixed on the shelf. Considering that it will cause greater friction with the machine body rolling belt, our factory deliberately selects high-quality anti-corrosion and wear-resistant materials to greatly increase the service life of the machine. The frame also adopts the integrated casting technology. In addition, there are hoisting hooks at the four corners of the supporting roller frame, which is convenient for loading and unloading.

2. Transmission part

The transmission part of the whole granulator is very important for the work of the whole body. The transmission frame is welded with high-quality channel steel, and has passed strict quality requirements. The main motor and reducer installed on the transmission frame are selected from ISO national inspection-free products, and the quality is reliable. The motor drives the belt pulley, V-belt, and reducer to the main shaft to make the body work. The transmission reducer is used in the main shaft working part, using nylon. The coupler engages and transmits the drive.

3. Big gear

It is fixed on the machine body, meshes with the transmission pinion, and drives the machine body to work oppositely. It uses high-tech wear-resistant materials to make the machine have a longer service life.

4. Rolling belt

It is fixed on both sides of the body to support the whole body.

5. Body part

The most important part of the whole granulator is the body part, which is welded by high-quality medium carbon steel plate, built-in special rubber liner or acid-resistant stainless steel liner, to achieve automatic scar removal and tumor removal, eliminating the traditional scraper device, and Through strict quality control and special process requirements, in order to achieve the purpose of this machine.