Top Chosen Granulation Technology in NPK Manufacturing

The compound fertilizer extrusion granulator adopts spiral, two-way rolling, two-way die and double roll granulation, but it is essentially different from other granulation equipment. The granulator enables organic materials to be continuous, high-speed and dense in the granulation area.

Rolling and shearing promote the physical granulation pressure between powder and granular materials to increase significantly.
With this method, the granulation effect is 2-3 times higher than that of conventional extrusion granulator, and the power consumption is reduced by more than 60%.

Double Roller Powder Granulator
Double Roller Powder Granulator

Characteristics of NPK compound fertilizer extrusion granulation equipment:

The frequency conversion PID operation feed automatic control system of the double roll granulator ensures that the granulation system produces high power and stability.

It can be widely used in sugar factory sludge filter, alcohol, starch, animal husbandry and other enterprises, and organic waste produces organic fertilizer, biological fertilizer, organic-inorganic compound fertilizer and other commercial granulation.

Due to the combined structure of various granulation skills in the granulation field, the granulation function of organic fertilizer is significantly enhanced, making organic fertilizer granulation one of the rapid, low consumption and promising granulation methods in modern industrial granulation. skill.

It is a unique advantage of similar fertilizer granulation equipment and has an advanced level in the production of organic fertilizer granulation.

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Fertilizer Production with Dry Granulation Equipment

Organic-inorganic compound fertilizer can not only provide comprehensive nutrition for crops, but also increase and renew soil organic matter, promote microbial reproduction, improve soil physical and chemical properties and biological activity, and reduce environmental pollution. Want to make compound fertilizer by your own fertilizer project, welcome go to

With the increase of crop yield per unit area and the increase of chemical fertilizer application, soil degradation is becoming more and more serious. Excessive application of chemical fertilizer, especially nitrogen fertilizer, is easy to cause soil nutrient imbalance, soil erosion, secondary salinization, soil acidification and other problems, resulting in the continuous decline of soil fertility.

Organic-inorganic compound fertilizer is a high-quality fertilizer for the production of green and pollution-free agricultural products. The yield of organic-inorganic compound fertilizer is about 10% higher than that of single chemical fertilizer.

Flat die extrusion granulator is suitable for granulation of organic-inorganic compound fertilizer. Organic and inorganic raw materials can be made into organic fertilizer. It is the key equipment in the production process of organic-inorganic compound fertilizer.

Production technology of organic-inorganic compound fertilizer

In the production process of organic-inorganic compound fertilizer, when the fertilizer particles are extruded, there is no need to spray water before granulation, and there is no need to dry and cool after granulation. The granulation rate of flat die extrusion fertilizer granulator is more than 90%.

Disc Granulation Line
Disc Granulation Line

Because the base fertilizer is not heated, nutrients will not be lost.

Moisture control of flat die extrusion fertilizer granulator

Because there is no drying equipment in the production process of organic-inorganic compound fertilizer, controlling the moisture of appropriate raw materials and controlling the moisture of finished fertilizer within the standard range is the key to the production of flat mold granulator.

In the production of fertilizer granulator, the dosage of calcium, magnesium and phosphorus fertilizer should be strictly controlled. Before granulation, calcium superphosphate should be added to calcium magnesium phosphate fertilizer to neutralize the raw materials.

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Top 6 ways to choose machines for organic fertilizer production

The main points of selecting complete sets of organic fertilizer production equipment are as follows

(1) Determine the size of the equipment: for example, you can determine how many tons can be produced per year, or how many tons can be produced per hour, you can determine the price. The biggest characteristic of self-propelled dumper is that it saves a lot of manpower and material resources, and makes the production scale of fertilizer more flexible.

Pan Granulation Fertilizer Production Line
Pan Granulation Fertilizer Production Line

It is especially suitable for transforming agricultural waste, manure and organic domestic waste into high quality bio organic fertilizer. The biggest feature of the machine is that it integrates the crushing function of materials in the later stage of fermentation, improves the crushing efficiency and reduces the cost. It is especially suitable for the production of good bio organic fertilizer from microbial fermentation materials. Complete equipment model of general organic fertilizer equipment manufacturer.

(2) Determine the shape of particles: powder, cylindrical, oblate or standard round. The commonly used granulators are: disc granulator, mixing gear granulator, drum granulator, flat mold granulator and ring film granulator. The choice of granulator should be decided according to the local fertilizer market. Different equipment, different prices.

(3) To determine the configuration level of equipment needed for biological fertilizer production: different configuration level, different equipment prices, different labor.

(4) Determine the type of fertilizer produced. It adopts four-wheel walking design. The rotary cutter shaft installed under the frame can overturn, fluff and shift the stack. It can rotate forward, backward or freely.

It only needs one person to control and drive. Or work in the workshop. The overall structure of the machine is reasonable, the force is balanced, firm, the performance is safe and reliable, and the operation and maintenance is simple and convenient. There are four kinds of common organic fertilizer: pure organic fertilizer, organic-inorganic compound fertilizer, biological organic fertilizer and microbial compound fertilizer. The equipment varies with varieties.

(5) Selection of fermentation thrower: General fermentation forms include chimney fermentation, shallow fermentation, deep tank fermentation, tower fermentation and drum fermentation. Different fermentation methods, different fermentation equipment.

(6) Determine the types of main organic raw materials: common organic raw materials include chicken manure, pig manure, cow manure, sheep manure, rice straw, drug residue, furfural residue, humic acid, pond sludge, municipal sewage treatment plant sludge. Wait. The choice of equipment is slightly different with different raw materials.

Cost of Machines in Organic Fertilizer Production

Full Lines for Organic Fertilizer Production

The cost of an organic fertilizer plant is in the hundreds of thousands to millions. The number of organic fertilizer production lines mainly depends on the expected annual output, plant area and raw materials.

Compost Made from Organic Waste
Compost Made from Organic Waste

Cost with Different Types of Capacities

To construct organic fertilizer production line, the scale and site of the project should be determined first. Organic fertilizer mainly uses materials with high organic content, which is processed into commercial organic fertilizer after fermentation pretreatment (the appearance of organic fertilizer is brown or grayish brown powder, without mechanical impurities and odor). Relevant planning can be carried out according to different raw materials, storage capacity, available amount and market demand. The process is divided into organic fertilizer, powder fertilizer and granular fertilizer.

Configurations matter

In a word, the equipment configuration of powdery organic fertilizer is simple and the investment cost is low. Small powder organic fertilizer production line from raw material fermentation to finished product packaging storage, complete set of equipment about 60000-70000 yuan.
Granular organic fertilizer has high equipment configuration and high investment cost. The investment of small granule organic fertilizer production line from raw material fermentation to granulation, drying and packaging is about 300000.

NPK fertilizer production technology

Using rotary drum granulator to produce NPK compound fertilizer, using amino acid method to realize fertilizer granulation, NPK fertilizer production process. The following is the whole process of fertilizer production.


1. Add the raw materials of batch processing system and the return of the whole production process to the rotary drum granulator. The rotary drum granulator is used for wet granulation, and the materials are gathered into the granules.

Rotary drum granulator

2. After metrological verification, concentrated sulfuric acid, dilute ammonium sulfate and cleaning solution of waste gas cleaning system are added into the mixing part of tubular reactor to mix and dilute.
3. After being measured and verified, the gas ammonia in the ammonia station can react with mixed acid quickly to produce high temperature ammonium sulfate and ammonium phosphate aqueous solution, which is evenly sprayed on the bed of granular material through atomizing nozzle.
4. After mixing other gas ammonia with steam, the monoammonium phosphate and super phosphate in the layer are reacted in the granulator again by the mixing device to release the reaction heat, while the wet raw material will aggregate the particles into the particles under the rotating action.
5. NPK fertilizer particles are transported to the rotary dryer and exchanged with hot air in the thermal spray furnace. Water evaporation of compound fertilizer granules.
6. The material is transported to the drum cutter to screen out the particles. The fine particles are immediately returned to the fertilizer granulator and regrouped into the granules. Large particles are crushed by the crusher and then returned to the granulator to form particles again.
7. Some semi-finished products are transported to rotary cooler to cool chemical fertilizer by blowing cold air or forced cooling air and water.
8. Qualified products are transported to the coating machine for polyurethane coating.
9. The finished product is transported to the automatic packing scale for weighing, packaging and storage.
10. Exhaust gas is discharged after cleaning by dust collector, sedimentation chamber and water bath.

How to make organic fertilizer pellets by granulator?

Organic fertilizer granulator is an important mechanical equipment for organic fertilizer production. The function of organic fertilizer granulator is irreplaceable. What are the advantages of organic fertilizer granulator compared with other fertilizer granulators? The following is a detailed description of its features.

Organic fertilizer granulator

In many organic fertilizer production equipment, the importance of organic fertilizer granulator is the first. The organic fertilizer granulator designed by our factory is the latest scientific and technological product developed on the basis of years of experience in compound fertilizer processing equipment design and production by Agricultural Machinery Research Institute.

Obtained the national utility model patent. It is used for granulation of various organic matters after fermentation. It breaks through the traditional granulation process of organic materials.

Fertilizer Drying Machine for Chicken Manure
Fertilizer Drying Machine for Chicken Manure

Instead of drying and crushing raw materials before granulation, spherical particles can be processed by direct ingredients, thus saving a lot of energy.
The characteristics of organic fertilizer granulator are used to produce pellets. The organic content can be as high as 100%. The granulation of organic matter can be completed.

Granulator uses organic particles under certain action, can be embedded in each other to grow, granulation does not need to add adhesive. Particles are solid and can be screened after granulation to reduce energy consumption without drying. Fermented organic matter can be processed in a fertilizer granulator. The moisture content of raw material is 20% – 40%.

How to make bio fertilizer products?

Production of bio-organic fertilizer

Bio-organic fertilizer refers to animal and poultry manure as the main raw material, inoculated with microbial compound ingenuity, the use of biochemical technology and microbial technology to completely kill pathogens, parasite eggs, eliminate odor, the use of microorganisms to break down organic fertilizer, the transformation of macromolecule materials and then converted into small molecules, to achieve the purpose of deodorization, decomposition, fertilizer drying process, to produce good physical performance, carbon-nitrogen ratio, moderate fertilizer organic fertilizer. Bio-organic fertilizer belongs to biofertilizer. The difference between bio-organic fertilizer and microbial agent is mainly reflected in the strains, production processes and application techniques.

Bio-organic fertilizer fermentation

Bioorganic fertilizer production line flow

Microbiological agents are added to animal waste before fermentation. In the process of composting, organic solid waste such as animal and poultry manure is crushed and screened after fermentation, decomposition, dehydration, deodorization and so on. Can be used as commodity fertilizer products, but also as the production of bio-organic fertilizer, inorganic compound fertilizer raw materials. In other words, the products of the powdered organic fertilizer production line can be used as raw materials for the production line of bio-organic fertilizer. The process of bio-organic fertilizer production line mainly includes mixing, granulation, drying, cooling, screening and so on. Organic fertilizer granulators, fertilizer dryers, coolers, sieve machines, and packaging machines are required.