The granulation process of organic fertilizers involves using different mechanical equipment to make regular particles from fermented organic materials. This not only facilitates transportation and storage, but also allows for better control of fertilizer application and improves fertilizer utilization in practical applications. At present, there are various types of organic fertilizer granulators on the market, each with unique technology and application scope. The following is an introduction to several common types of organic fertilizer granulators:
Working principle: The material rotates inside a tilted disk, diffuses outward under centrifugal force, and gradually aggregates to form spherical particles. By adjusting the spray liquid (such as water or binder), it helps particles solidify and grow.
Features: Simple structure, easy operation, suitable for granulation of most organic materials.
Scope of application: Suitable for medium-sized organic fertilizer production lines, especially for making medium-sized granules.
a. Roll squeezing granulator
Working principle: The material is compressed by a pair of relatively rotating rollers and extruded through the mold holes to form rod-shaped or granular products.
Features: Suitable for materials that are difficult to agglomerate and can be pelletized without the need for additional adhesives.
Scope of application: Suitable for raw materials such as animal manure and urban sludge that are not easily clumped.
b. Single screw/twin-screw extrusion granulator
Working principle: Using the thrust of a single or multiple screws, the material is extruded into particles through a mold hole under heating conditions.
Features: Can provide higher pressure and temperature, suitable for the production of high-density and high-strength particles.
Scope of application: Suitable for situations that require high compaction, such as biomass fuels and composite organic fertilizers.
3. Mixing Granulator
Working principle: While the material is stirred in a closed container, liquid or steam is sprayed to promote the material to condense into particles.
Features: It can achieve synchronous mixing and granulation of materials, suitable for situations where fine control of particle size and shape is required.
Scope of application: Suitable for high-end organic fertilizer production that requires precise control of particle properties.
4. Fluid Bed Granulator
Working principle: With the support of the air flow at the bottom, the material is suspended. At the same time, the spray liquid makes the particles form in the air and gradually increase.
Features: Able to quickly dry particles, suitable for granulation of materials that require immediate drying.
Scope of application: Suitable for organic materials that are prone to moisture or require rapid drying, such as microbial fertilizers.
Working principle: The material rolls inside the drum and forms spherical particles through appropriate water addition and stirring.
Characteristics: Large production capacity, suitable for large-scale industrial production.
Scope of application: Suitable for large organic fertilizer factories, especially for processing large amounts of raw materials.
Each type of granulator has its unique advantages and limitations, and choosing the appropriate granulator requires consideration of various factors such as raw material characteristics, expected particle specifications, and production scale. Proper selection of granulation equipment can not only improve product quality, but also optimize production costs and enhance the market competitiveness of enterprises.