Working principle and characteristics of double roller granulator for dry granulation

Working principle of double roller granulator

When the double roller granulator works, it is forced to roll the material into shape by two opposite moving roller skins of the granulator. Semi circular spherical cavities are regularly distributed on the two cylindrical roller skins. When the roller skin rotates against each other, the two semicircular cavities just form a complete spherical mold, and the materials inside are forced to be extruded into spherical particles. Due to the continuity of extrusion production, the particles and particles are connected together when they are just extruded, forming a cloth full of particles, which needs to be broken up by the crushing roller and divided into small round particles, and then screened from the screen to select the qualified particles.

double roller granulator

In the production of granular fertilizer by double roller fertilizer granulation machine, it should be noted that the ball socket on the two roller skins should be in good position. If it is not adjusted in place, there will be a certain dislocation during granulation, which can not produce qualified granular fertilizer. In addition, after the formation of particles, they will be released from the ball and socket of roller skin in time, so as to realize continuous production. If the formed particles do not come out in time, complete particles will not be formed, thus affecting the normal production.

Characteristics of double roller granulator for dry granulation
1. There is no drying process in the organic fertilizer granulation machine. It is granulated at room temperature and formed in one time. It has the advantages of less investment, quick effect and good economic benefit.
2. Compound fertilizer double roll extrusion granulator has small power, reliable operation, no waste discharge, stable operation, convenient maintenance, reasonable process layout, advanced technology and low production cost.
3. The material of the roller extrusion granulator is widely used, not only in fertilizer industry, but also in all kinds of chemical raw materials such as snow melting agent.

Environmental protection granulation process of double roller granulator

The double roller granulator uses the way of forced extrusion to make particles, the whole process does not need drying and cooling, and the equipment investment is small. What’s more important is that this granulation method is a very environmentally friendly production mode because it is made of particles by physical methods, and the whole process has no pollution and no waste.

double roller gr

Environmental protection granulation process of double roller granulator

When the double roller extrusion granulator works, it is forced to roll the material into shape by two opposite moving roller skins of the granulator. Semi circular spherical cavities are regularly distributed on the two cylindrical roller skins. When the roller skin rotates against each other, the two semicircular cavities just form a complete spherical mold, and the materials inside are forced to be extruded into spherical particles. Due to the continuity of extrusion production of organic fertilizer granulation machine, the particles and particles are connected together when they are just extruded, forming a cloth full of particles, which needs to be broken up by the crushing roller and divided into small round particles, and then screened from the screen to select the qualified particles.

The fertilizer granulation machine has the advantages of low investment and good economic benefit. The complete set of equipment is compact in layout, scientific and reasonable, and advanced in technology. Energy saving and consumption reduction, no three wastes discharge, stable operation, reliable operation and convenient maintenance. It is suitable for granulation of various raw materials such as compound fertilizer, medicine, chemical industry, feed and so on.

Difference between the production machines of organic fertilizer and compound fertilizer

The internal quality of organic fertilizer mainly depends on raw material fermentation and product formula. The key factors affecting the fermentation of organic fertilizer production process are: microorganism, carbon nitrogen ratio, carbon phosphorus ratio, water content, pH value, aeration control. If one factor is not properly controlled, the whole fermentation will be affected, resulting in incomplete fermentation of materials or long fermentation time. If the material fermentation is well formulated, the effect is better than inorganic fertilizer, and the cost is also low. It can also improve the living environment of plants and become green fertilizer. The formula of organic-inorganic compound fertilizer is different from that of inorganic fertilizer, and there are also differences in different soil and crop formulas. The organic fertilizer manufacturing process is different from that of compound fertilizer, and the fertilizer production machine is also different.

Difference of production technology between compound fertilizer and organic fertilizer

The machines required for the organic fertilizer manufacturing process is mainly divided into two parts, fermentation part and production granulation part. NPK fertilizer manufacturing process is mainly granulation processing. The granulation part of organic fertilizer is also different from that of inorganic fertilizer.
Because organic raw materials are different from inorganic raw materials, the production of inorganic raw materials can be mainly based on the formula of raw materials, which is mainly chemical reaction. If the formula is proper, the operation is skilled, the pelletizing rate is very high, and the production is relatively easy. Roller granulator is suitable for dry granulation of NPK fertilizer and disk granulator is suitable for wet granulation.
For organic fertilizer, granulation is difficult even if the raw materials are fermented well, because the characteristics of organic raw materials are light, rough, low adhesion, and a wide variety of organic raw materials. Raw materials have different characteristics, so when selecting fertilizer granulating machine, special attention should be paid, otherwise not only the output will be affected, but also the appearance of the product is not beautiful. Rotary drum granulator is generally used for granulation of organic fertilizer and compound fertilizer.

fertilizer production machine
fertilizer production machine

When selecting the organic fertilizer production machine, we should pay attention to the following points: output of organic fertilizer production, organic raw materials, fermentation mode, fertilizer granulator machine, mechanization degree of organic fertilizer equipment. These are key factors in purchasing equipment. In short, organic fertilizer production is a relatively complex process, but the risk is relatively small, which can bring rich profits to the enterprise.

High efficient automatic batching system for organic fertilizer production line

A set of fertilizer automatic batching equipment is composed of several automatic batching bins and automatic batching machines, which can accurately batching in the production of organic-inorganic compound fertilizer and mixed fertilizer, so as to control the proportion of various nutrients and ensure the quality of products. The automation of batching and weighing system reduces the labor intensity of workers and improves the accuracy of batching. It is an indispensable equipment in the NPK fertilizer production line and organic fertilizer manufacturing process.

Organic fertilizer automatic batching system

Automatic batching system is an automatic equipment used for quantitative distribution of raw materials for a variety of materials (such as fertilizers). It is mainly used in the fertilizer industry to replace manual bench scales or volumetric measurement. This machine has the characteristics of high measurement accuracy, high distribution efficiency, high degree of automation, etc. It is one of the main parts in the complete batching equipment of the automatic batching machine.
Organic fertilizer automatic batching system
The fertilizer automatic proportioning device can complete the automatic proportioning according to user needs, and is suitable for various dry powders and granular materials with low viscosity. The decomposed compost processed by the compost turning machine can also be used as a raw material. The automatic batching system adopts microcomputer control, electronic monitoring, digital prompt, wired remote control operation, and has the characteristics of accurate weighing, high batching precision, fast speed, good control function and convenient operation.

Application of fertilizer automatic batching system

The growth of crops needs a variety of nutrients, for example, nitrogen, phosphorus and potassium are the basic elements which need a large amount. When using the electronic batching machine for batching, it is necessary to set a silo for each raw material containing these elements. The raw materials used in the production of organic-inorganic compound fertilizer are all powdery. After the raw materials of these different components are configured according to the set proportion, they are made into compound fertilizer particles by the disc granulator machine. In the production of mixed fertilizer, granular raw materials can be placed in the batching system.

The automatic batching system is used in all kinds of organic compound fertilizer production lines, which can effectively guarantee the batching accuracy and improve the productivity. The mechanism is simple, reliable and easy to operate and maintain. Because the measurement is accurate, it can effectively guarantee the quality of organic fertilizer and compound fertilizer. Electronic batching machine is a new type of batching machine, especially suitable for compound fertilizer and compound fertilizer manufacturing plant.

Horizontal fertilizer mixer machine for bio fertilizer granulator

Bio-organic fertilizer granulator based on chicken manure, pigeon manure, duck droppings, and other poultry manure, Adding auxiliary soymeal, dregs, slag, yeast, sugar and trace elements N, P, K, and so on. And through the fermentation process, crushing or granulating into organic fertilizer equipment for chicken manure organic fertilizer products. For the farmers, most of the bio-organic fertilizer granulators purchased for self-production and self-sale, so they pay more attention to the price. For the farmers, due to the small number of raw materials, small organic fertilizer granulators are generally chosen small organic fertilizer granulator.

This series of horizontal mixing(blending) machine is a new generation of mixing equipment which developed by our company. It has high mixing degree and less residue. It is suitable for mixing organic and inorganic fertilizer. The specific features as following: the material can be fully mixed, thus improving the mixing uniformity;the new rotor structure be used to make the gap between the rotor and the casing close to zero, thus effectively reducing the residual amount the material; the special rotor design of the machine can also break the large material, the overall structure is more reasonable, the appearance is beautiful, and the operation and maintenance are convenient.

Horizontal fertilizer mixer machine
Horizontal fertilizer mixer machine

Features of horizontal mixier:

1.Fast mixing speed with good uniformity.
2.Widely application.
3.Fast speed discharging and ledd residue.

In fertilizer prodution line, it is to be equipped with the fermentation compost turner machine to ferment the raw materials that the series fertilizer machine can use the simple compost turner machine to ferment the raw materials. And then it is to be equipped with the fertilizer crusher machine and fertilizer mixer machine and fertilizer crusher machine to deal with the raw materials. We can use the chain crusher machine, and the horizontal mixer machine to deal with the organic raw materials. Next, when producing the organic fertilizer granulator, the fertilizer granulator machine are necessary to be equipped in the fertilizer manufacturing process.

In organic fertilizer production line, we can use the rotary drum granulator machine which it is also to be equipped in npk fertilizer production line to finish the production process of the npk fertilizer granulator. The rotary drum granulator machine generally to be used by using the wet granulation method to finish the production process.This point is different from the roller press organic fertilizer granulator machine that it is usually to use the dry granulation method to produce the fertilizer granulator.

Organic fertilizer equipment drum granulator and disc granulator being export

Our organic fertilizer production line granulation equipment is ready for export. The granulator is common equipment for our organic fertilizer manufacturing process, and it is also used more equipment. The plant exported two granulation equipment: a disc granulator machine and a rotary drum granulator.
fertilizer production machine

Disc Granulator Machine

1. The disc angle of the granulating disc adopts the integral circular arc structure, and the granulation rate can reach more than 93%.

2. The pelletizing tray has three outlets, which is convenient for discontinuous production, greatly reduces the labor intensity and improves the labor efficiency.

3. The reducer and motor are driven by flexible belt, which can start smoothly, reduce the impact force and improve the service life of the equipment.

4. The bottom of the pelletizing tray is strengthened by several radiation steel plates, which are durable and never deformed. Thickened, heavier and strong base design, without anchor bolts fixed, smooth operation.

5. The main gear of disc granulator is quenched by high frequency, and its service life is doubled.

6.The organic fertilizer granulator disc is lined with high-strength FRP, which is corrosion-resistant and durable.

7. The whole machine is divided into frame parts welded with high carbon channel steel.

8. Disc pan granulator adjusting part is welded by high carbon steel plate and channel steel.

9. The service life of high frequency quenching used in transmission part is twice as long as that of the original one, and taper matching is adopted in the connection part of the column head, which makes the design more reasonable.

10. The pan granulator plate is designed by integral arc, which is durable and never deformed.

11. The automatic cleaning part is equipped with automatic cleaning boards, so as to remove the materials adhering to the plate wall in the production process, greatly improve the service life and save labor.

Rotary Drum Granulator

  • (1) Rotary drum granulator has high productivity. It has specifications of 1-3 tons per hour, 3-5 tons per hour and 5-8 tons per hour, 10-15 tons per hour, etc. The granulation rate of organic fertilizer can reach more than 90%.
  • (2) The energy saving and consumption reduction of the equipment is that the raw materials are carried out at room temperature, which reduces the dry energy consumption.
  • (3) Low investment, drum granulation organic fertilizer manufacturing process eliminates the raw material drying process, while the return ratio is low, the operation process is simple and convenient, the operation is stable and reliable, maintenance is relatively convenient and easy, greatly saving labor intensity;
  • (4) Simplify the production process. The equipment makes use of the intermolecular force of the raw material itself, simplifies the process of granulation of the raw material, and reduces the consumption of additives and energy.
  • (5) Green and environmental protection, because the equipment only uses electric energy, no three wastes are discharged, which is in line with the requirements of green environmental protection.
  • (6) Rotary drum granulator is widely used. This equipment is mainly used in medicine, chemical industry, feed, compound fertilizer and granulation of various raw materials. It can produce various types and concentrations of compound fertilizer.

How to choose cow dung organic fertilizer machine manufacturers?

The cow manure organic fertilizer production line can effectively reduce the eutrophication of surface water bodies caused by pollution, solve the environmental pollution caused by breeding industries such as cattle farms and other organic wastes, and lay a foundation for human consumption of green food and organic food. A good foundation is conducive to improving the safety and quality of agricultural products, and the ecological and environmental benefits are extremely significant.

fertilizer machine

The cow manure organic fertilizer manufacturing process is using organic waste such as livestock manure to produce bio-organic fertilizer, pure organic fertilizer and organic inorganic fertilizer. The cow manure organic fertilizer equipment is characterized by fresh cow dung as raw material, after a series of processing and advanced technology, producing complete sets of production equipment of natural organic cow manure fertilizer.

The equipment is easy to operate, low in energy consumption and high in output. It adopts a new generation of high-efficiency granulation process, scientific and reasonable process, compact layout, and effectively solves the key technical problems, such as the organic raw materials are difficult to granulate of traditional granulation process, the addition amount is low, and the raw materials need to be dried and smashed treatment. The cow manure organic fertilizer equipment has stable operation, energy saving and no consumption, no three discharges, convenient maintenance, reliable operation and wide adaptability of raw materials. It can produce spherical pure organic fertilizer, organic inorganic fertilizer and biological organic fertilizer; the particles are round and uniform, smooth, good fluidity and high strength.

How to choose cow dung organic fertilizer production line equipment manufacturers? First, let us know what equipment is composed of cow dung organic fertilizer equipment?

Cow manure organic fertilizer equipment is divided into three configurations: low, medium and high:

Low configuration: semi-wet material pulverizer, horizontal mixer, fertilizer granulator machine, drum sieving machine, packaging equipment.

Medium configuration: semi-wet material pulverizer, horizontal mixer, fertilizer granulator machine, dryer, cooler, drum sieving machine, packaging equipment, belt conveyor, etc.

High configuration: chicken manure dehydrator, fermentation compost turner machine, semi-wet material crusher, horizontal mixer, fertilizer granulator machine, dryer, cooler, drum sieving machine, coating machine, packaging equipment, belt conveyor, etc.

The quality of organic fertilizer equipment directly affects the level of efficiency. Therefore, when we choose the cow manure organic fertilizer machine manufacturers, we must not blindly choose, we must choose strong and responsible manufacturers. It is not easy for customers to earn every penny. It is also necessary to carefully select the equipment that is more suitable for them and find a manufacturer of organic fertilizer production lines with excellent technology and good after-sales service.

Other article for your reference:Sheep manure organic fertilizer production line

What is the reason that the compost turner machine is used for manure composting?

As a new type of compost turner machine, Double-screws Turning Machine is widely used in animal manure organic fertilizer production and bio-organic fertilizer production. It is the core equipment of aerobic dynamic composting, and it is based on the organic Fertilizer manufacturing process and NPK fertilizer production machinery equipment family. The unique mechanical design and practical mechanical properties are rapidly multiplying, and it is the best substitute for replacing the manual and forklift materials. It is the mainstream product of the pre-fermentation application of organic fertilizer production line and biofertilizer project.

The Double-screws Turning Machine comprises a traverse device, a traveling device and a tumbling device, wherein the tumbling device comprises two reducers fixed to the frame, a screw shaft connected to the respective reducer via a coupling member and fixed with a spiral blade. When the device is walking on a specific track, the screw shaft will no longer work, and the screw shaft will automatically rotate to move against the work when walking to the effective work surface. The fermentation rate is increased, the compost is rapidly decomposed, the odor is prevented from being generated, and the fermentation time is shortened.
Double-screws Turning Machine performance characteristics:

  1. Fully stir the doping to make the material meet the granulation demand quickly.
  2. Due to the large stacking force, the material is supplemented with more fresh air, which helps the aerobic microbial fermentation to heat up, and constitutes a process of high-temperature exchange, which helps all kinds of beneficial micro-bacteria to develop and multiply in the temperature range where it adapts.
  3. The turner system can process the material into small clumps, making the thick and dense material pile loose and elastic, and forming a suitable porosity.
  4. After the raw materials are turned over and fermented, there is certain water content. The consumption of raw materials by a large amount of microorganisms generated after turning over the piles will also release the water in the carrier. Therefore, as the fertilizer process reduces water, in addition to the evaporation of the heat transfer composition, the turning machine flips the raw materials to form a forced water vapor volatilization.
  5. Achieve special requirements for the composting process. For example, the breaking of the raw material, the shape of the raw material pile or the quantitative shift of the raw material is achieved. As one of the important equipments in the fermentation equipment and organic fertilizer production process, the turner has been at the forefront of the development of the times, making great contributions to the organic fertilizer production line andbiofertilizer project.

The working principle of the disc granulator in the fertilizer production line

The disc granulator machine is mainly used in the NPK fertilizer production line and organic fertilizer production line to produce various granular products; it’s also used in pharmaceutical products, fertilizers, feeds, etc. Adopting the overall arc structure, the granulation rate can reach above 93%. The granulation tray has three discharge ports, which facilitates intermittent production operations, greatly reduces labor intensity and improves labor efficiency.

Disc fertilizer granulator machine working principle:
The raw meal powder is uniformly wetted by the atomized water in the mixer to form a spherical core having a uniform particle size, and then fed into a ball plate for ball formation. The moisture of the ball should be controlled at 12-14%. Most of the water should be added in the twin-shaft mixer. Only a small amount of supplementary water is added to the ball plate, and the amount of water added is controlled to be about 0 to 3%. The dry powder granulation is directly added to the ball-forming plate, and the proper amount of water is sprayed. The raw material nucleus enters the spherical disk and is subjected to centrifugal force, friction and gravity in the disk, and moves along the parabola. Due to the cohesiveness and plasticity of the material, the cores are bonded to each other and gradually grow up during the movement. When the inclination angle of the ball disc, the height of the disc edge, the rotation speed and the moisture are constant, the balls of different particle sizes roll downward from the edge of the disc at different disengagement angles due to different gravity. During the continuous rolling process, the ball continuously discharges the water in the ball out of the surface. Due to the cohesiveness of the material and the natural volatilization of the surface liquid film, the ball has certain strength, and then the disk is rotated with the tilting of the disk. The sides are discharged out of the pan.

Disc granulator performance advantages:
1. The raw materials are suitable for a wide range of applications. They can be used for granulation of various raw materials such as compound fertilizer, medicine, chemical feed, coal, metallurgy, etc., and can produce various concentrations and various types (including organic fertilizer, inorganic fertilizer, and magnetic fertilizer etc.) of compound fertilizer.
2. The disc granulator is light in weight, low in height, and flexible in process;
3. The machine has simple structure, convenient adjustment and superior performance.
4. The use of unique unpowered combination scraper integration reduces auxiliary power consumption.

5, high ball formation rate, large rounded particle strength, intuitive operation, easy maintenance and so on.

Fertilizer granulator machine is the core equipment for fertilizer manufacturing process. As one of leading fertilizer machine manufacturers in China, in addition to the disc granulator, we also produce other types of fertilizer granulator machines, and other equipment such as compost turning machines, mixer machine, crusher machine, etc.


Fertilizer equipment


Fertilizer  equipment plays an extremely important role in the production process of fertilizer. In the era of advocating organic cultivation, it is an important step for investors who want to invest in the organic fertilizer market to choose appropriate organic fertilizer equipment. Here, we can understand the concept of different organic fertilizers, and then understand the different process modes that can be used for the production of commercial organic fertilizers, the production of organic fertilizers under the conditions of planting and breeding mode, and the production of organic fertilizers in small-scale farms, as well as how to select the appropriate biological fertilizer production equipment under various modes.

organic fertilizer production

1. Organic fertilizer raw materials

According to the different raw materials and processing technology of organic fertilizer, it can be roughly divided into compost, retting, manure, biogas fertilizer, green fertilizer, straw fertilizer and other organic fertilizers. Compost refers to a kind of organic fertilizer, which is composed of crop straw, manure and animal carcasses, rice husk, grass and a small amount of soil. The difference between retting and composting is the organic manure which is produced by fermentation under the condition of flooding, and the raw materials used are the same as compost. The raw materials used for the manure are the manure of livestock and poultry and the bedding materials in the shed, which are made of compost. The raw material of biogas fertilizer is the same as that of compost. The process is the residual biogas liquid and residue after biogas production by anaerobic fermentation, which is the by-product after biogas production. Green manure uses green plants as fertilizer. Straw fertilizer raw materials include corn, rice and other crop straws. Under suitable conditions, through the role of soil microorganisms, the elements in straw are mineralized back to the soil and re absorbed by crops. There are other organic fertilizers, such as cake, sludge and so on, which can be processed into organic fertilizer through the organic fertilizer production equipment.

3. Organic fertilizer production equipment

The complete organic fertilizer production line is composed of a variety of organic fertilizer equipment. The key equipment is fermentation reactor and organic fertilizer granulator, which are divided into raw material preparation stage and finished product processing stage.

Organic fertilizer granulator

In the whole organic fertilizer manufacturing process, the organic fertilizer granulator plays an important role in the fertilizer production equipment. The raw materials of organic fertilizer change in this link and become commercial organic fertilizer. The quality and output of organic fertilizer particles are important embodiment here. Organic fertilizer particles are formed by binding organic fertilizer raw materials together with water as binder, and the amount of water directly affects the production efficiency. Theoretically speaking, in the mixing process of the mixer in front of the organic fertilizer granulator, if the amount of water added is small, the viscosity of the powder will be small and the particles produced will be very small; otherwise, if the amount of water added is large, the viscosity of the powder will be large and the particles produced will be very large. Of course, this also leaves us a lot of choices. We can choose the appropriate particle size of organic fertilizer according to the needs to meet the market demand.

These fertilizer machines not only can be used in the organic fertilizer production line,it also can be used in the bio fertilizer production line or npk fertilizer production line to produce the bio organic fertilizer granulator or npk,compound fertilizer.