-
1. What is a drum dryer? How does it work?
A drum dryer is a device that dries materials. Its working principle is to feed wet materials into the drum through a conveyor. As the drum rotates, the materials are continuously thrown up and fully contacted with hot air to achieve uniform drying. Drum dryers are suitable for various granular and block materials. Common applications include drying of coal slime, ore, sand, NPK compound fertilizer and organic fertilizer. The processing capacity of a drum dryer can reach several tons to dozens of tons per hour, depending on the diameter and length of the drum and the supply of heat source.
-
2. What are the advantages of organic fertilizer dryers?
Organic fertilizer dryers are specially used to process wet materials of organic fertilizers. Their advantages are fast processing speed, uniform drying, and effective retention of nutrients in organic fertilizers. Organic fertilizer dryers use high-temperature drying technology to ensure that microorganisms and nutrients in organic fertilizers are not destroyed by high temperatures while drying efficiently, thereby improving fertilizer efficiency. Organic fertilizer dryers can dry wet materials with a moisture content of 40%-50% to about 10%-, meeting the requirements of most organic fertilizer production lines. In addition, the equipment also supports a variety of heat sources, and users can choose coal, natural gas, electricity and other methods to heat the equipment.
-
3. What is the difference between a drum dryer and a fluidized bed dryer?
The main difference between a drum dryer and a fluidized bed dryer is the drying method and the materials they are suitable for. A drum dryer uses a rotating drum and hot air to dry materials, and is suitable for materials with larger particles and higher water content, such as NPK compound fertilizer, organic fertilizer, ore, etc. A fluidized bed dryer uses airflow to suspend the material, and passes hot air through the gaps between the materials for drying, and is suitable for powdered materials with smaller particles. Data shows that fluidized bed dryers have higher precision in drying efficiency and temperature control, especially when dealing with heat-sensitive materials. Drum dryers are suitable for large-scale continuous drying production and have higher processing capacity.
-
4. What materials are suitable for fluidized bed dryers? What are its advantages?
Fluidized bed dryers are widely used for drying powdered, small particles and heat-sensitive materials, such as chemical powders, fine-grained ores, grain crops, organic fertilizers, etc. Its main advantages are efficient drying speed and precise temperature control. Since the material is in a suspended state during the drying process, hot air can pass evenly through the surface of the material, making the drying more uniform and avoiding the problem of material agglomeration or over-drying. Data shows that the drying time of fluidized bed dryers is usually 30%-50% shorter than that of traditional equipment, and the thermal efficiency can be improved by 20%-30%, which is very suitable for production processes with high requirements for drying quality.
-
5. What materials are suitable for fluidized bed dryers? What are its advantages?
Fluidized bed dryers are widely used for drying powdered, small particles and heat-sensitive materials, such as chemical powders, fine-grained ores, grain crops, organic fertilizers, etc. Its main advantages are efficient drying speed and precise temperature control. Since the material is in a suspended state during the drying process, hot air can pass evenly through the surface of the material, making the drying more uniform and avoiding the problem of material agglomeration or over-drying. Data shows that the drying time of fluidized bed dryers is usually 30%-50% shorter than that of traditional equipment, and the thermal efficiency can be improved by 20%-30%, which is very suitable for production processes with high requirements for drying quality.
-
6. How to choose a dryer suitable for NPK compound fertilizer production?
When choosing a dryer suitable for NPK compound fertilizer production, the characteristics of the material, production capacity requirements and energy consumption must be considered. The drum dryer is often used in large-scale NPK compound fertilizer production lines due to its large processing capacity and stability. It can reduce the moisture content from 40%-50% to 2%-5%, which is very suitable for drying granular materials. For smaller production lines or powdered NPK fertilizers, the fluidized bed dryer is also an ideal choice due to its efficient heat transfer and precise temperature control performance, but most fertilizer plants in China choose to use drum dryers because this is a mature process.