The working principle and granulation process of the roller extrusion granulator

fertilizermachinery

The working principle and granulation process of the roller extrusion granulator

The roller squeezing granulator is a commonly used fertilizer granulation equipment, especially suitable for the granulation production of organic and compound fertilizers. The following is a brief introduction to the working principle and granulation process of the roller extrusion granulator:

operational principle

Extrusion molding: The core part of the roller extrusion granulator is composed of a pair of relatively rotating pressure rollers, which have grooves on the surface. When the material is fed between the two rollers, it is compressed to form a strip shape.

Shear cutting: After the extruded strip material passes through the pressure roller, it is usually cut by a fixed or rotating tool to form the required length of particles.

Adjustment control: By adjusting the gap and speed between the pressure rollers, the size and shape of the particles can be controlled.

Granulation process

Raw material preparation: Firstly, suitable raw materials need to be prepared, such as powder of organic fertilizers or mixtures of compound fertilizers.

Moisturizing and mixing: In order to improve the granulation efficiency, the raw materials usually need to be moistened and mixed with an appropriate amount of water and binder to improve their plasticity.

Conveying and feeding: The mixed materials are uniformly fed into the feeding area of the roller squeezing granulator through conveying equipment.

Squeezing: The material is compressed into strips under the high pressure of the pressure roller, and excess water is squeezed out.

Cutting: The extruded strip material is cut or cut into particles of the desired length.

Drying: Newly formed wet particles contain high moisture and require drying treatment through drying equipment to reduce moisture content, improve particle hardness and stability.

Screening and grading: The dried particles are screened through screening equipment to remove particles that do not meet the requirements and ensure product quality.

Cooling: The screened particles usually require further cooling to ensure their stability during storage and transportation.

Packaging: Finally, the qualified granular fertilizer is automatically weighed and packaged before leaving the factory.

The roller extrusion granulator has been widely used in the field of fertilizer granulation due to its advantages of high efficiency, energy saving, and strong adaptability. By optimizing process parameters and equipment maintenance, the production efficiency and product quality of fertilizer particles can be effectively improved.

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How the planetary gearbox (or planetary gearbox) works:Gear box is used to change the speed, reduction box or reduction motor is through the gear change, the principle is a big gear with gear or small gear with big gearAs can be seen from the above introduction: once the speed ratio of the reducer is selected, it cannot be changed. The reducer can change speed and change the driving direction. Accelerate and decelerate, is often said to reduce gear box. For example, we use two fan gears to transfer the force vertically to the other rotating axis. Under the same power condition, the faster the speed of the gear, the smaller the torque of the shaft, and vice versa.

Several basic granulation methods of NPK fertilizer

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Fertilizer production line generally uses the following methods to granulate:1.

Extrusion granulation is a method of making dry powder or wet powder containing binder into cylindrical, spherical or sheet shape by mechanical processing such as extrusion, roller extrusion or pressing.

The technology of dry granulation is used in the flat die pellet mill, the ring die pelleting machine and the double roller granulator.2.

Agglomerating granulation, which is under the action of rotation, vibration, agitation and so on, makes the wet powder in motion agglomerate.

Or use the fluidized bed to make the material obtain the cohesive force by supplying the spray liquid binder) so as to grow into the appropriate particles.

This method is used in disc granulator and rotary drum granulator.3.

Noise reduction method of organic fertilizer granulator during use

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The principle of rotary drum granulator is that the material relies on the surface tension, an appropriate amount of liquid phase, and the extrusion force generated by the rolling between the materials. The control of water content, material quality and water temperature in the operation of the disc granulator of organic fertilizer equipment. How to reduce the noise of the organic fertilizer granulator in the npk manufacturing process, there are the following suggestions:1. There may be a problem with the bearing of a certain part of the organic fertilizer granulator, which makes the machine work abnormally, the working current fluctuates, and the working current is too high. The ring die is blocked, or a part of the die hole is detached from the material.

What is the difference between organic fertilizer and compound fertilizer?

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Making organic fertilizer, composting is the key process. For example, there are crawler organic compost turners and small turners to meet your composting requirements. The preparation of compound fertilizer granules is slightly different from organic fertilizer. The raw material for making granular compound fertilizer should be in powder form. Huaqiang wet fertilizer granulator includes disc granulator machine, drum granulation and new organic fertilizer granulator.

The working principle and granulation process of the stirring tooth granulator

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The organic fertilizer agitator granulator is used to granulate various organic substances after fermentation, breaking through the conventional organic granulation process. The complete production line of stock conversion, stirring, and granulation is used to process organic raw materials after fermentation. Before granulation, the fermented raw materials are crushed, and the ingredients are directly mixed with a mixer into the stirring tooth granulator machine to produce spherical particles. The working principle of the stirring tooth granulator equipment is to use the high-speed rotating mechanical stirring force and the resulting aerodynamic force to continuously mix, granulate, spheroidize, compact and other processes of fine powder materials in the machine, thereby achieving the purpose of granulation. The particle formation rate is ≥ 80%.

From Raw Material to Masterpiece: The Process of Steel Fabrication

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