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What are the methods for drying granules in organic fertilizer production?

 In the organic fertilizer production process, dry granules are an indispensable step. The national regulations stipulate that the moisture content of organic fertilizer should reach 30% to meet the national standard. Then the organic fertilizer moisture after granulation in the process of producing organic fertilizer reaches 50%. Left and right, sometimes higher, dry granule moisture, has become an important part of the production of fertilizer.


In the drying process of organic fertilizer production the method of drying is quite critical. Fertilizers produced with organic fertilizer equipment are completely dry fertilizers. How does organic fertilizer equipment produce dry fertilizers, and what are the methods?

First, the mechanical dehydration method: the mechanical dehydration method is to press the material and then squeeze a part of the water. Commonly used methods include pressing, sedimentation, filtration, and centrifugation. The mechanical dehydration method is only used for the early moisture removal of the raw materials, and the method of producing the particles is not suitable. Therefore, the moisture content of the material after mechanical dehydration is still high, generally 40 to 60%. However, mechanical dehydration is the most economical method. This method is most suitable for dehydration of livestock manure.

Second, organic fertilizer dryer heating drying method: This is what we often say the drum dryer drying method, which uses thermal energy to enter the dryer cylinder, the cylinder temperature reaches 150 degrees, according to different materials, The temperature can be adjusted to vaporize the moisture in the material, and the removal of moisture from the material requires a certain amount of thermal energy. This method usually uses air to dry the material. The air is preheated and sent to the dryer to transfer heat to the material, vaporize the moisture in the material, form water vapor, and carry it out of the dryer with the air. The material is heated and dried to remove the bound moisture in the material to achieve the moisture content required by the product or raw material. This method can be applied to a variety of industries and is one of the easiest ways to meet the requirements. .

Third, chemical dehumidification method: This method uses moisture absorbent to remove a small amount of water in gas, liquid, and solid materials. Due to the limited dehumidification capacity of the moisture absorbent, it is only used to remove trace moisture in the material. Therefore, this method is rarely used in fertilizer manufacturing process.