Our rotary drum cooler is regularly used to cool fertilizers with a certain temperature and granularity in compound fertilizer production lines. The inlet temperature of materials generally is 60 °~ 80°, the outlet temperature is less than 40°. It is always used in combination with the drying machine to greatly increase cooling speed, improve the cooling rate and product quality, and further remove the water and reduce fertilizer particle temperature.

Due to its reliable operation, flexible operation, strong adaptability and large processing capacity. It is widely used in metallurgy, building materials, food, light industry, chemical industry, coal, pharmaceutical and mining industries.

Features:

1. Fast cooling, reduce labor intensity and increase production.

2. The cooling effect is good, the partial moisture is quickly removed and the granular temperature of the compound fertilizer is lowered.

3. It is highly adaptable and can be used for cooling other powdery and granular materials.

4. The structure is compact, the cooling efficiency is high, the performance is reliable, and the adaptability is strong.

5. The drum cooler is suitable for cooling the clinker from the rotary kiln, and at the same time, the large amount of thermal energy carried by the high temperature material is absorbed by the air, and the combustion air entering the kiln is preheated to a high temperature to strengthen the calcination and reduce the heat consumption. An auxiliary equipment for rotary kiln.

6. The air after cooling the material is completely introduced into the kiln as a secondary circulation air, which improves the thermal efficiency of the kiln.

Advantage

1. Compact structure, easy maintenance, reliable performance, low energy consumption.
2. Rational distribution and angle of lifting plates maximize heat transfer between materials and cooling air, improving cooling efficiency and achieving evenly cooling effect.

3. Strong adaptability, suitable for processing granules with a broad particle size distribution.

4. Multiple models available for your choice, and also can be customized.
5. The rotating speed of the cylinder can be adjusted according to your requirement.
6. Adopt high quality wear-resistant materials, ensure long service time of the machine.

Working principle

1. The main motor drives the belt and belt pulley, and transfers to the driving shaft through the reducer. The pinion which is installed on the driving shaft engages with the gear fixed on the machine body, working in the opposite direction to make the cylinder rotate.
2. The rotary drum is slightly slanted with an angle of 2-5°. By the belt conveyor, the hot fertilizer from the dryer is sent into the drum cooler through the feed hopper at the higher end. Meanwhile, under the suction of the draught fan at the feed end, the air flow inside the cylinder speeds up.
3. With the rotation of the cylinder, the materials flow down to the lower end with the effect of gravity. The lifting plates installed on the inner wall of the cylinder lift the granular materials continuously, forming a uniform material curtain, which counter current contact with the suction cool air and exchange heat, the temperature of the materials is reduced, achieving the aim of cooling and further reducing the moisture. The cooled materials flow out from the lower end of rotary drum and are sent to the rotary screener by the belt conveyor. The tail gas enters into the dust settling chamber. 

Function:

The high temperature materials generated by the belt conveyor or a bucket elevator often need to be cooled to a certain temperature by the chiller before being transported, stored and further processed.

According to the need, the cooling machine can recover a large amount of heat carried by the high-temperature materials with air, and preheat the combustion air into the rotary to a higher temperature to enhance combustion and reduce heat consumption.

The dried wet material is sent to the hopper by a belt conveyor or a bucket elevator, and then fed through the hopper through the feeding pipe into the feeding end. The slope of the feeding pipe is greater than the natural inclination of the material so that the material flows smoothly into the cooler. The cooler cylinder is a rotating cylinder that is slightly inclined to the horizontal. The material is added from the higher end, the heat carrier is discharged from the lower end, and is in counter current contact with the material, and the heat carrier and the material are simultaneously flowed into the cylinder. As the rotating material of the cylinder is moved by gravity to the lower end. During the forward movement of the wet material in the cylinder body, the heat supply of the heat carrier is directly or indirectly obtained, so that the hot material is cooled, and then sent out at the discharge end through a belt conveyor or a screw conveyor. A copy board is arranged on the inner wall of the cylinder, and its function is to copy and sprinkle the material, so that the contact surface of the material and the air flow is increased to increase the cooling rate and promote the advancement of the material. The cooling body is generally classified into cold air or the like. After the heat carrier passes through the cooler, a cyclone is generally required to trap the material contained in the gas. If you want to further reduce the dust content of the exhaust gas, you should also discharge it after passing the bag filter or the wet dust collector.

Technical parameter: