The granulation process of the entire organic fertilizer production line

fertilizer granulator May 10, 2025

Granulation is the core process in organic fertilizer production, which directly affects the physical properties, nutrient release efficiency, and market competitiveness of fertilizers. This article will systematically analyze the complete process of organic fertilizer granulation, covering equipment selection, process parameters, and quality control points.

1、 Pre treatment before granulation

Raw material crushing

After fermentation and maturation, organic materials need to be processed by a semi wet material crusher to crush fiber materials (such as straw and mushroom residue) to a particle size of 3-5mm to ensure granulation flowability.

Key parameters: The moisture content should be controlled at 25% -30%. If it is too high, it is easy to block the mold, and if it is too low, the adhesion is insufficient.

Mixing of ingredients

Add functional excipients (such as humic acid and microbial agents) according to product requirements, and mix evenly (coefficient of variation ≤ 5%) using a dual axis mixer.

Typical case: When producing bio organic fertilizers, microbial agents need to be added in a low temperature (<40 ℃) environment to avoid loss of activity.

2、 Core granulation process

Disc granulator (suitable for small and medium-sized production capacity)

Working principle: The tilted rotating disk (with an inclination angle of 35 ° -55 °) causes the powder to roll and bond into particles under the action of centrifugal force.

Technical points:

Spray an appropriate amount of water or binder (such as lignosulfonate) to promote molding;

The particle diameter is adjusted by disc rotation speed and inclination angle (usually 2-6mm).

Advantages: Low equipment investment (about 50000 to 80000 yuan per unit), suitable for production lines with an annual output of less than 5000 tons.

Drum granulator (suitable for large-scale production)

Working principle: The material forms particles through agglomeration in the rotating drum, and is assisted by hot air for drying.

Technical points:

The rotation speed of the cylinder is 8-15r/min, and the filling rate is controlled at 20% -30%;

It can simultaneously complete granulation and pre drying, with a production capacity of 10-20 tons/hour.

Roll squeezing granulator (low-energy solution)

Applicable scenario: Powdered organic fertilizers with low particle strength requirements can be directly formed without drying.

Advantages: The power consumption is only one-third of that of disc granulation, but the surface smoothness of the particles is poor.

3、 Post processing procedure

Drying and dehydration

Use a drum dryer (hot air temperature 80-120 ℃) to reduce the moisture content of the particles from 30% to ≤ 15% to avoid storage mold.

Energy saving design: Some production lines utilize fermentation waste heat to provide heat sources, reducing energy consumption by more than 20%.

Cooling screening

The vibration cooling machine lowers the particle temperature from 60 ℃ to room temperature, and at the same time, it is classified through multiple layers of sieves (such as 4mm and 6mm aperture) to remove powder and oversized particles.

Encapsulation treatment (optional)

Spray anti caking agents (such as mineral oil) or slow-release film materials on the surface of particles to enhance product added value.

4、 Key points of quality control

Particle strength: ≥ 15N/particle (to avoid transportation breakage);

Molding rate: Disc granulation ≥ 85%, drum granulation ≥ 90%;

Survival rate of microbial agent (bio fertilizer): The granulation temperature should be ≤ 50 ℃, and the survival rate should be>80%.

5、 Innovative technology application

Intelligent control system: Real time monitoring of the humidity and temperature of the granulation disk through sensors, automatic adjustment of water spray volume and speed.

Composite granulation process: organic-inorganic fertilizer mixed granulation, with both fast acting and long-lasting characteristics.

Organic fertilizer granulation is a key link in balancing physical properties and production costs. Enterprises need to choose suitable processes based on the characteristics of raw materials (viscosity, fiber content) and product positioning (ordinary organic fertilizer/high-end biological fertilizer). In the future, with the development of technologies such as low-temperature granulation and precise coating, organic fertilizer particles will continue to upgrade towards functionalization and intelligence.

Organic fertilizer flat mold granulator provides stable guarantee for particle forming

fertilizer granulator May 10, 2025

In the field of organic fertilizer production, the organic fertilizer flat mold granulator provides stable guarantee for particle forming with its unique advantages.

The core components of a flat mold granulator are the flat mold and the pressure roller. During operation, the material is evenly conveyed to the surface of the flat mold, and the pressure roller is tightly pressed onto the flat mold under power drive and rotates around the axis. Under the squeezing action of the pressure roller, the material is extruded through the mold holes on the flat die, forming columnar particles, which are then cut into appropriate lengths by a cutting knife to complete the granulation process.

This granulation method produces organic fertilizer particles with regular shapes and uniform sizes. The regular shape facilitates the neat stacking of fertilizers during storage and transportation, reducing gaps and scattering caused by irregular particles. Uniform size ensures that each particle carries a relatively consistent amount of nutrients during fertilization, allowing crops to absorb nutrients more evenly and avoiding situations of excessive or insufficient local nutrients, thereby improving the efficiency of fertilizer use.

The stability of the flat mold granulator is extremely high. Its structural design is reasonable, and key components have been carefully selected and processed to withstand long-term, high-intensity workloads. The precision of the combination between the flat mold and the pressure roller is high. During operation, the pressure roller has a stable squeezing force on the material, and there will be no fluctuations in size, which ensures the stable quality of organic fertilizer particles produced in each batch. Whether it is a small organic fertilizer production workshop or a large industrial production enterprise, they can rely on flat die granulators to stably produce products that meet quality standards.

In addition, the flat mold granulator has strong adaptability to raw materials. It can process various organic materials with different properties, such as livestock manure, crop straw, distiller’s grains, etc. As long as these raw materials are properly pre treated and the parameters such as moisture and particle size are adjusted, they can be smoothly granulated in a flat mold granulator. This makes the enterprise more flexible in raw material selection, able to fully utilize the abundant organic resources in the local area for production, and reduce production costs.

The organic fertilizer flat mold granulator, with its stable granulation process, regular and uniform particle quality, and wide adaptability to raw materials, has become a reliable particle forming equipment in organic fertilizer production, providing strong support for the stable development of the organic fertilizer industry.

Kitchen waste is gradually becoming an emerging raw material for organic fertilizer granulation

fertilizer granulator May 10, 2025

With the increasing awareness of environmental protection and the emphasis on resource recycling, kitchen waste is gradually becoming an emerging raw material for organic fertilizer granulation, demonstrating enormous potential.

Leftover food is the main component of kitchen waste, which contains abundant organic substances such as carbohydrates, proteins, and fats. These substances are easily decomposed and utilized by microorganisms under appropriate conditions. After classification, collection, and preprocessing, leftover food can enter the fermentation system. Under the action of microorganisms, they are decomposed into small organic molecules, releasing nutrients such as nitrogen, phosphorus, and potassium. Mixing the fermented product with other auxiliary materials and processing it through an organic fertilizer granulator can produce nutrient rich organic fertilizers.

The fruit peel is also a high-quality organic fertilizer raw material. Apple peels, banana peels, orange peels, etc. are rich in various vitamins, minerals, and bioactive substances. During the fermentation process, these substances will gradually decompose and blend into fertilizers, providing unique nutrients for crops. For example, banana peels contain high levels of potassium, and processed organic fertilizers can effectively increase the potassium content in the soil and enhance the stress resistance of crops. Using an organic fertilizer granulator to turn fermented fruit peels into granules facilitates fertilization operations and better preserves nutrients.

Bones can also be used for organic fertilizer granulation after processing. Bones contain a large amount of minerals such as calcium and phosphorus, which can become important sources of nutrients in fertilizers after being crushed and fermented. Especially for some crops that require calcium and phosphorus supplementation, the use of organic fertilizers containing bone components has a significant effect. Processing it into granular fertilizer through an organic fertilizer granulator can not only improve the utilization rate of fertilizer, but also reduce odors and facilitate storage and transportation.

Although waste oil cannot be directly used as organic fertilizer raw materials, after special treatment, it can be mixed with other organic materials to participate in the fermentation process. Waste oil is decomposed by microorganisms to produce fatty acids and other substances, which help improve the physical properties of fertilizers, increase their viscosity, and make the granulation process smoother.

Kitchen waste, as an emerging raw material for organic fertilizer granulation, not only solves the problem of waste disposal, but also provides new fertilizer resources for agricultural production. By proper treatment and processing with organic fertilizer granulators, kitchen waste can be turned into treasure, making positive contributions to ecological agriculture and sustainable development.

The process and characteristics of efficient granulation in NPK fertilizer production line

fertilizer granulator May 10, 2025

As the mainstream product of compound fertilizers, NPK fertilizer’s granulation process directly affects nutrient uniformity, particle strength, and application effectiveness. The modern NPK fertilizer production line achieves precise compound of nitrogen, phosphorus, and potassium elements through scientific proportioning and efficient granulation technology. The following is a typical NPK fertilizer granulation process and key technology analysis.

1、 Raw material pretreatment and batching system

Raw material crushing and screening

Raw materials such as phosphate and potassium salts need to be processed by a chain crusher to a particle size of 1-3mm to ensure sufficient subsequent reactions.

The vibrating screen is used to remove impurities, and the purity of raw materials is required to be ≥ 95%.

Accurate ingredients

Using electronic belt scales and weight loss feeders, the dynamic proportioning error is ≤ 0.5%.

A typical NPK formula (such as 15-15-15) requires precise control of the ratio of urea, monoammonium phosphate, and potassium chloride.

2、 Core granulation process

Steam granulation method (drum granulation)

technological process:

The mixed raw materials enter the rotary drum granulator and are sprayed with saturated steam (pressure 0.3-0.5MPa).

The material is bonded by liquid phase (molten urea) during rolling, forming 1-4.75mm particles.

Key parameters:

Material temperature: 80-100 ℃

Steam consumption: 50-80kg/ton fertilizer

Particle forming rate: ≥ 90%

High tower melt granulation (suitable for high nitrogen formulations)

Process characteristics:

Urea, ammonium nitrate, etc. are melted and sprayed from the top of the tower (nozzle aperture 1.5-3mm).

During the process of particle falling, it cools and solidifies, forming spherical particles (strength ≥ 20N).

Advantages:

Smooth particles that are not prone to clumping

More uniform release of nutrients

3、 Post processing procedure

Drying and Cooling

The drum dryer (hot air temperature 120-150 ℃) reduces the moisture content of particles from 3% to ≤ 1%.

The fluidized bed cooler quickly cools down to below 40 ℃ to avoid nutrient decomposition.

Screening and material return processing

Classification of three-level vibrating screen:

Qualified particles (2-4.75mm) enter the coating section.

Fine powder (<2mm) is returned to the granulator.

Large particles (>5mm) are crushed and reused.

Anti caking treatment

Spray diatomaceous earth or mineral oil onto the wrapping tube (dosage 0.5-1.5kg/ton).

The new polymer coating agent can extend the fertilizer effectiveness period to 3-6 months.

4、 Key points of quality control

Nutrient testing

Real time monitoring of N, P, and K content using an online near-infrared analyzer, with a deviation controlled within ± 0.3%.

Particle physical indicators

Strength ≥ 15N (measured by drum method)

Particle uniformity (over 90% of particles are concentrated in the 2-4mm range)

environmental requirements

The exhaust gas undergoes cyclone dust removal and wet scrubbing, with a dust emission of ≤ 30mg/m ³.

5、 Technological innovation direction

Energy Saving

Adopting a steam condensate water recovery system can reduce energy consumption by 15-20%.

intelligent control

The AI based granulation parameter optimization system can automatically adjust the steam volume and drum speed.

The NPK fertilizer granulation process integrates chemical principles and mechanical technology, among which the steam granulation method dominates due to its low cost and wide adaptability, while the high tower granulation is known for its product quality. By precisely controlling the ingredients, granulation temperature, and post-treatment process, compound fertilizer products with uniform nutrients and excellent physical properties can be produced. In the future, with the development of intelligent and green manufacturing technology, NPK fertilizer granulation will evolve towards a more efficient and environmentally friendly direction.

Characteristics of Organic Fertilizer Flat Mold Granulator in Modern Organic Fertilizer Production Industry

fertilizer granulator May 10, 2025

In the modern organic fertilizer production industry that pursues high efficiency and energy conservation, the organic fertilizer flat mold granulator stands out as the undisputed pioneer in granulation.

From the perspective of production efficiency, the organic fertilizer flat mold granulator has excellent performance. Its unique structural design enables materials to be quickly and fully squeezed between the flat mold and the pressure roller, thereby achieving a continuous and efficient granulation process. The large load-bearing capacity of the flat mold and the high-speed rotation of the pressure roller ensure that a large amount of material is made into particles through the mold holes per unit time. Compared to some traditional granulation equipment, the flat die granulator can complete the same production task in a shorter time, greatly improving the production efficiency of enterprises and meeting the growing demand for organic fertilizers in the market.

In terms of energy conservation, the organic fertilizer flat mold granulator also has excellent performance. It adopts an advanced power transmission system, reducing energy loss during the transmission process. The rolling friction between the pressure roller and the flat mold can effectively reduce energy consumption compared to the sliding friction of some other granulation equipment. Moreover, the flat die granulator can achieve smooth granulation of materials without excessive pressure during operation, which further reduces the power demand of the equipment and saves energy costs.

In addition, the maintenance of the flat die granulator is relatively simple, which indirectly improves its overall operating efficiency and energy-saving effect. The simple structural design enables maintenance personnel to quickly and accurately locate the fault point and carry out repairs, reducing equipment downtime. Regular maintenance work is also relatively convenient, which can ensure that the equipment is always in good operating condition, avoiding energy waste and production efficiency decline caused by equipment aging or failure.

At the same time, the flat die granulator has a high conversion rate of materials during the granulation process, and can almost convert all the input materials into qualified granular fertilizers, reducing material waste and achieving energy conservation and efficiency improvement from another perspective.

The organic fertilizer flat mold granulator, with its efficient production capacity and energy-saving operating characteristics, has reduced production costs for organic fertilizer production enterprises, improved market competitiveness, and become an important force in promoting the efficient and energy-saving development of the organic fertilizer industry.

Sludge processing fertilizer can contribute to agricultural production

fertilizer granulator May 10, 2025

Sludge, seemingly a waste, actually contains enormous potential to become a raw material for organic fertilizer granulation. After scientific treatment, it can contribute to agricultural production.

The sludge generated by urban sewage treatment plants contains a large amount of organic matter, which is the product of microbial metabolism and incompletely decomposed animal and plant residues. It also contains a certain amount of nutrients such as nitrogen, phosphorus, potassium, as well as various trace elements. However, harmful substances such as heavy metals and pathogens may also exist in sludge, so strict treatment must be carried out before using it as organic fertilizer raw material.

Firstly, the sludge needs to be dehydrated to reduce its moisture content and facilitate subsequent processing operations. Then, through harmless treatment methods such as high-temperature composting, the organic matter in the sludge is further decomposed and transformed by microorganisms, while killing pathogenic bacteria and parasitic eggs. During the composting process, adding an appropriate amount of conditioner can improve the physical properties of the sludge and promote the smooth progress of the fermentation process.

After harmless treatment, the properties of the sludge have been significantly improved, making it a usable raw material for organic fertilizer granulation. Mix the treated sludge with other organic materials such as livestock manure, crop straw, etc. in a certain proportion, and then add necessary microbial agents to promote sufficient fermentation and nutrient fusion between the materials.

At this point, use an organic fertilizer granulator to process the mixed material. The organic fertilizer granulator can turn these materials into granular organic fertilizers, which are not only convenient for storage and transportation, but also can slowly release nutrients after being applied to the soil, improving the utilization rate of fertilizers.

After special treatment, industrial sludge may also become a raw material for organic fertilizer granulation. For example, some sludge generated by the food processing industry contains abundant organic components. After removing harmful impurities and sufficient fermentation, it can also be used to produce organic fertilizers.

Sludge, as a potential raw material for organic fertilizer granulation, has achieved the resource utilization of waste. Through scientific processing and the use of organic fertilizer granulators, sludge can be transformed into organic fertilizers beneficial to agriculture, providing nutrients to the soil, promoting crop growth, and reducing environmental pressure. It has good environmental and economic benefits.

The granulation process of organic fertilizer production line from powder to granules

fertilizer granulator May 10, 2025

In the production of organic fertilizers, granulation is the core process that determines the appearance, storage, and application effectiveness of the product. Through granulation technology, powdered organic fertilizer can be converted into uniform particles, reducing dust and improving fertilizer efficiency and slow-release properties. The following is a typical organic fertilizer granulation process and key equipment analysis.

1、 Preparation before granulation

Raw material pretreatment

Fermentation and maturation: Organic matter (livestock manure, straw, etc.) needs to undergo 15-30 days of aerobic fermentation to ensure complete maturation (moisture ≤ 30%, C/N ratio 20-30:1).

Crushing and screening: The raw materials are crushed to 3-5mm using a semi wet material crusher to remove impurities.

Mixing of ingredients

Adding auxiliary materials (such as humic acid and microbial agents) to improve fertilizer efficiency, the dual axis mixer ensures a mixing uniformity of ≥ 95%.

2、 Core process of granulation technology

Adhesive addition (optional)

For loose materials such as pure manure, 10% -15% bentonite or lignosulfonate can be added as binders.

Selection of granulation equipment

Disc granulator (suitable for small and medium-sized production capacity)

Principle: The tilted disk rotates, and the material rolls and bonds into particles under centrifugal force.

Parameters: Adjustable diameter of 2-8mm, production capacity of 1-5 tons/hour, power consumption of 15-20kW • h/ton.

Drum granulator (suitable for large-scale production)

Principle: The materials in the drum form particles through spray adhesive liquid (such as molasses).

Parameters: Capacity of 10-20 tons/hour, particle strength ≥ 15N.

Roll squeezing granulator (low-energy solution)

Principle: High pressure forced molding, no need for drying, suitable for high fiber materials such as mushroom residue.

Key control points for wet granulation

Moisture regulation: During granulation, the moisture content of the material should be controlled at 25% -35%. If it is too high, it is prone to adhesion, and if it is too low, the molding rate will decrease.

Particle size control: Adjust the inclination angle of the disc (35 ° -55 °) or the drum speed (20-40rpm) to change the particle size.

3、 Post processing procedure

dry

Using a drum dryer (hot air temperature 80-120 ℃), the moisture content of the particles is reduced from 30% to ≤ 15% to avoid mold growth.

cooling

Vibration cooling machine or counter current cooling tower can quickly cool down to room temperature and improve particle hardness.

screening

Classification of double-layer vibrating screen:

Upper sieve (4-6mm): Qualified particles enter the packaging section.

Intermediate sieve (2-4mm): Return the material and re pelletize it.

Lower sieve (<2mm): Grind and reuse.

Capsule (optional)

Spray anti caking agents (such as mineral oil) or slow-release film materials to extend fertilizer efficiency.

4、 Process optimization direction

Energy saving design

Waste heat recovery system: utilizing dried exhaust gas to preheat fresh air, reducing energy consumption by 20% -30%.

Automated control

Online moisture detector+PLC linkage, real-time adjustment of drying temperature and granulation parameters.

Special process of biological fertilizer

Low temperature drying (≤ 45 ℃) or fluidized bed drying to protect the activity of functional microorganisms.

The granulation process of organic fertilizer requires flexible selection of equipment and parameters based on the characteristics of the raw materials. Disc granulation is suitable for small-scale diversified production, drum granulation is suitable for standardized large-scale output, and extrusion granulation is known for its low energy consumption. By optimizing moisture control, particle size grading, and drying and cooling processes, the particle forming rate (≥ 90%) and product competitiveness can be significantly improved. In the future, granulation systems combined with intelligent control will become a key focus of industry upgrading.

How to efficiently produce organic fertilizers on a large scale using a rotary drum granulator

fertilizer granulator May 10, 2025

The rotary drum granulator is a powerful tool for efficient production on organic fertilizer production lines, and its unique granulation characteristics provide support for the large-scale development of the organic fertilizer industry.

When the mixed organic fertilizer material enters the rotary drum granulator, with the uniform rotation of the drum, the material begins a wonderful “journey” inside the drum. They constantly roll and collide, and in this process, the moisture in the material acts like a magical “glue”, causing the particles to gradually aggregate and grow. To accelerate the granulation speed, an appropriate amount of binder solution can be sprayed into the drum to further enhance the viscosity between the materials.

The significant advantage of the rotary drum granulator is first reflected in its extremely high production efficiency. The continuous rotation of the drum enables the granulation process to proceed uninterrupted and can process a large amount of material per hour. This is crucial for large-scale organic fertilizer production enterprises to meet the growing market demand for organic fertilizers and enhance their market competitiveness.

Secondly, the rotary drum granulator has a wide range of adaptability to raw materials. Whether it is various organic materials such as animal manure, crop straw, kitchen waste, or mixed materials containing a certain proportion of inorganic components, they can be treated equally and effectively processed into granules. This broad adaptability makes enterprises more flexible in raw material selection, reduces production costs, and also facilitates the full utilization of various organic waste resources to achieve maximum resource utilization.

Furthermore, by adjusting parameters such as the rotation speed of the drum, the filling rate of materials, and the spraying amount of binders, operators can flexibly control the size and strength of organic fertilizer particles. For example, appropriately reducing the rotational speed of the drum can prolong the residence time of materials in the drum, which is beneficial for the formation of larger particles; Increasing the spraying amount of adhesive can improve the strength of particles. With these advantages, the rotary drum granulator plays an irreplaceable role in the organic fertilizer production line, injecting strong impetus into the efficient development of the organic fertilizer production industry.

Cake and meal materials are a type of nutrient rich organic fertilizer granulation raw material

fertilizer granulator May 10, 2025

Cake and meal materials are a type of nutrient rich organic fertilizer granulation raw material that plays an important role in improving the quality of organic fertilizers.

Bean cake is one of the most common raw materials for cake and meal. The soybean cake left after pressing and extracting oil contains a large amount of protein, amino acids, as well as nutrients such as nitrogen, phosphorus, and potassium. These rich nutrients make soybean cake a high-quality raw material for organic fertilizers. After fermentation treatment, the high molecular weight organic matter in soybean cake is decomposed into small molecules, which are more easily absorbed and utilized by crops. Using an organic fertilizer granulator to turn fermented soybean cake into granular fertilizer can accurately control the nutrient content and release rate of the fertilizer, providing comprehensive and lasting nutritional support for crop growth.

Rapeseed cake also has high nutritional value. It contains abundant crude protein, phosphorus, potassium, and various trace elements. The organic matter in rapeseed cake can be decomposed and transformed by microorganisms in the soil, which can increase soil fertility and improve soil structure. Processing rapeseed cake into granules through an organic fertilizer granulator not only facilitates fertilization, but also reduces nutrient volatilization and loss, improving fertilizer utilization efficiency.

Cottonseed cake is also an ideal choice for organic fertilizer granulation. Cottonseed cake is rich in large amounts of elements such as nitrogen, phosphorus, and potassium, as well as trace elements such as iron, zinc, and manganese. However, cottonseed cake contains a certain amount of toxic substances such as gossypol, which need to be detoxified before being used as organic fertilizer raw materials. After detoxification and fermentation, cottonseed cake is processed into granular fertilizer by an organic fertilizer granulator, which can safely and effectively provide nutrients for crops and promote their growth and development.

Sesame cakes have attracted attention for their unique aroma and rich nutritional content. Sesame cakes contain high levels of protein, fat, and various minerals, and their nutritional components are unique and balanced. After fermentation and granulation treatment, the organic fertilizer made from sesame cake can not only provide sufficient nutrients for crops, but also improve the quality of agricultural products to a certain extent, making them have better taste and flavor.

Cake and meal materials, as high nutrient raw materials for organic fertilizer granulation, can produce high-quality organic fertilizers through reasonable treatment and processing by organic fertilizer granulators. These fertilizers not only meet the nutritional needs of crop growth, but also enhance soil fertility, improve soil environment, and provide strong guarantees for the sustainable development of agriculture.

Common equipment for processing fertilizers in fertilizer production lines

fertilizer granulator May 10, 2025

The fertilizer production line is a key system for converting organic waste, chemical raw materials, etc. into efficient fertilizers, and its equipment configuration directly affects production efficiency and product quality. According to the type of fertilizer (organic fertilizer, compound fertilizer, biological fertilizer, etc.), the production line equipment varies, but the core process is similar. The following is an analysis of commonly used equipment and their functions in fertilizer production lines.

1、 Raw material pretreatment equipment

crusher

Function: Crush large raw materials (such as animal manure, straw, ore, etc.) to a suitable particle size for processing.

Common types:

Chain crusher: suitable for high humidity organic materials such as fresh manure and sludge.

Hammer crusher: suitable for drying raw materials such as phosphate ore and potassium salt.

Key parameters: The discharge particle size is usually controlled between 3-10mm, and the processing capacity is 5-20 tons/hour.

screening machine

Function: Remove impurities (such as stones and plastics) from raw materials to ensure stable subsequent processes.

Common types: drum screen, vibrating screen.

2、 Fermentation equipment (specifically for organic fertilizers)

Flipping machine

Function: Promote aerobic fermentation of materials and accelerate maturation speed.

Common types:

Slot type flipping machine: suitable for fixed fermentation tanks, flipping depth of 1.5-2 meters.

Crawler type compost turning machine: suitable for outdoor composting, with strong maneuverability.

Key parameters: Fermentation cycle is 15-30 days, and the temperature needs to be maintained at 50-70 ℃ to kill pathogens.

Fermentation tank (suitable for small production lines)

Function: Closed fermentation, reducing odor emissions, high degree of automation.

3、 Mixing and batching equipment

Mixing machine

Function: Mix different raw materials (such as nitrogen, phosphorus, potassium) or fermented organic matter evenly.

Common types:

Dual axis blade mixer: Mixing uniformity ≥ 95%, suitable for powdered materials.

Vertical mixer: suitable for viscous materials such as sludge and straw.

Automatic batching system

Function: Accurately control the raw material ratio (such as the N-P-K ratio in Hefei).

Key parameters: The dynamic error of the electronic scale is ≤ 0.5%, and it supports PLC automation control.

4、 Granulation equipment

Disc Pelletizer

Function: Roll the material into granules by rotating the disc, suitable for small and medium-sized production.

Advantages: Adjustable particle diameter of 2-8mm, low power consumption (15kW • h/ton).

Rotary Drum Granulator

Function: Continuous production, suitable for large-scale granulation of compound fertilizers.

Advantages: High production capacity (10-50 tons/hour), good particle strength.

extruder

Function: No drying process, direct high-pressure molding, suitable for bio organic fertilizers.

5、 Drying and cooling equipment

Rotary Dryer

Function: Reduce particle moisture (from 30% to ≤ 15%).

Key parameters: Hot air temperature of 200-300 ℃, reverse flow design saves 30% energy.

Cooling machine

Function: Avoid particle agglomeration and improve storage stability.

Common types: vibration cooler, fluidized bed cooler.

6、 Screening and packaging equipment

vibrating screen

Function: Graded particles, removing particles that are too large or too small (such as qualified 4-6mm products).

Automatic Packaging Machine

Function: Quantitative packaging (25kg/bag or 50kg/bag), accuracy ± 0.2%.

Type: Valve packaging machine (powder fertilizer), weighing packaging machine (granular fertilizer).

7、 Environmental protection auxiliary equipment

Dust removal system: Reduce dust pollution in the crushing and screening processes.

Deodorization equipment: biological filter or chemical washing tower, used to treat fermentation waste gas.

The selection of equipment for fertilizer production lines should be comprehensively considered based on the characteristics of raw materials, production capacity requirements, and product types (organic fertilizer/compound fertilizer/biological fertilizer). Modern production lines are developing towards automation and energy conservation, such as introducing IoT to monitor fermentation temperature and AI to optimize ingredient ratios. Reasonable equipment configuration can not only improve efficiency, but also reduce energy consumption and labor costs, helping fertilizer companies achieve sustainable development.