The fluidized bed granulator manufacturer will take you to understand: the main domestic granulation technology methods at present
The fluidized bed granulator manufacturer tells you that the current domestic granulation technology mainly has the following forms according to its granulation mechanism: pressure forming granulation method, stirring rolling granulation method, hot melt cooling granulation method, spray drum granulation method, Spray fluidized bed granulation method.
Pressure molding granulation method: The fluidized bed granulator manufacturer tells you that the pressure molding granulation method is a granulation method in which the material to be granulated is confined in a certain space and compressed into a dense state by applying pressure. The fluidized bed granulator manufacturer tells you that its granulation mechanism is entirely agglomeration granulation. According to the different external force system applied, the pressure forming method can be divided into the molding method, the extrusion method, and the extrusion spheronization granulation method. This kind of granulation method is currently widely used in petrochemical, organic chemical, fine chemical, pharmaceutical, food, feed, fertilizer and other fields. The advantage of this granulation method is that it has various shapes and can be granulated according to different needs. The fluidized bed granulator manufacturer tells you that the shortcomings are complicated mechanical failures and high maintenance requirements. In particular, dehydration and drying are often required after granulation, and drying equipment needs to be set up after granulation. Moreover, due to the discharge of moisture during the drying process, the compactness of the particles is reduced, the hardness of the particles is reduced, and even cracks are broken.
Stirring and rolling granulation method: The fluidized bed granulator manufacturer tells you that the stirring and rolling granulation method is a kind of granulation method in which a certain liquid or binder is penetrated into the solid powder and stirred appropriately to produce cohesive force and produce agglomerates. . The granulation mechanism is entirely agglomeration granulation. The fluidized bed granulator manufacturer tells you that the advantages of this granulation method are simple forming equipment, easy maintenance, large output of a single machine, and the formed particles are easy to dissolve quickly and have strong moisture permeability. The fluidized bed granulator manufacturer tells you that the obvious disadvantages are poor particle uniformity, low molding rate, low particle hardness, and easy breakage. Dehydration and drying are often required after granulation, and drying equipment needs to be installed after granulation. Moreover, due to the discharge of moisture during the drying process, the compactness of the particles is reduced, the hardness of the particles is reduced, and even cracks are broken.
Hot melt cooling granulation method: This kind of granulation method is to heat the material to make it into a liquid state, and then cool the liquid through a special condensation method to make it into flakes, hemispheres, strips, and blocks. method. This kind of granulation method often requires the material to have the characteristics of low melting point and high solubility. The fluidized bed granulator manufacturer tells you that this granulation method has the advantages of low failure rate and simple equipment. The shortcomings are also more obvious. First, it must go through the heating and melting process, and then through the cooling process, and then heat and dry after granulation, so the energy consumption is extremely high. Especially for high-tower cooling granulation, the equipment and civil construction investment is huge, and with the emergence of new granulation methods, there is a tendency to be replaced. The fluidized bed granulator manufacturer tells you that after granulation, dehydration and drying are generally required. During the drying process, the particles are easily damaged due to the removal of water.
Spray drum granulation method: This granulation method is to spray the molten liquid or binder used for granulation into a rotating rotary cylinder granulator with an atomizing nozzle—commonly known as a drum granulator. Most of the granulation mechanism is agglomeration granulation and part of coating granulation. The fluidized bed granulator manufacturer tells you that the key to its granulation is the good combination of the dynamic fluidized cloth of the material in the drum and the spray form of the atomized nozzle. It is required to return material during granulation, and the amount of return material is extremely large. Through a large amount of returned fabric, prevent the occurrence of sticking to the wall and scarring. The fluidized bed granulator manufacturer tells you that the advantages of this granulation method are large granulation output, uniform granularity, good granularity, and it can complete the granulation and drying process in one step. The disadvantage is that the process is long, the amount of returned material is large, and the dust pollution is large. The bigger disadvantage is the large investment in equipment and civil construction. Mainly used in compound fertilizer industry.
Spray fluidized bed granulation method: This granulation method is to spray the molten liquid or binder or material solution used for granulation into the fluidized bed in the material layer which is in the violently fluidized state by atomization method. The extremely fine droplets formed after atomization adhere to the surface of the crystal nucleus before the moisture is removed to form a local infiltration layer. At the same time, the fine powder in the smaller material layer is adhered to the local infiltration layer, and the moisture is gradually removed. The materials in the solution together with the adhered fine powders form a layered substance that adheres to the surface of the crystal nucleus due to the removal of water, and the particles are enlarged. The fluidized bed granulator manufacturer tells you that this process is repeated. In the granulation area of the granulator, the crystal nucleus is continuously subjected to the impact of the materialized droplets and the collision between the crystal nuclei, coupled with the gradual removal of water, the increase of particles is gradual and uniform, synchronized with the evaporation of water Therefore, the spray fluidized bed granulation provides a uniform and dense structure and improves the strength of the particles. The fluidized bed granulator manufacturer tells you that most of its granulation mechanism is coating accumulation granulation, and a small part is agglomeration granulation. This granulation method is suitable for both dry granulation and cooling granulation, and the granulation mechanism is the same. The fluidized bed granulator manufacturer tells you the advantages of this granulation method are: uniform granularity, high granule strength, good slow release, film coating, granulation output can be large or small, short process, simple operation, equipment and civil engineering The investment is small. The disadvantage is that there are certain requirements for the concentration of the raw material and the fluidity of the raw material liquid.
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