How to dry wet compound fertilizer granules?

Particle drying is an essential step in the production line of nitrogen, phosphorus and potassium fertilizer. The state requires that the moisture content of compound fertilizer must be less than 30% to meet the national standard. Then in the process of compound fertilizer production, the water content of organic fertilizer after granulation reaches about 50%.

Sometimes even higher, the moisture content of dry particles has become an important link in fertilizer production.

Rotary Drum Dryer Used in Fertilizer Production Line
Rotary Drum Dryer Used in Fertilizer Production Line

In the drying process of fertilizer manufacturing process, it is very important to pay attention to the drying method. The fertilizer produced by the compound fertilizer equipment is full dry fertilizer. So how does compound fertilizer equipment produce dry fertilizer? What are the methods?

1. Mechanical dewatering method: mechanical dewatering method is to pressurize materials and then extrude some water. Common methods include pressing, sedimentation, filtration, centrifugation, etc. Mechanical dehydration is only used for the initial dehydration of raw materials. This method is not suitable for the production of particles.

Therefore, the moisture content of materials after mechanical dehydration is still high, generally 40-60%. However, mechanical dehydration is the most economical method, which is most suitable for the dehydration of poultry and animal feces.

2. Heating and drying method of compound fertilizer dryer: This is what we often call drum dryer drying method. It uses heat energy to enter the dryer barrel, and the temperature in the barrel reaches about 150 degrees. According to different materials, the temperature can be adjusted to evaporate the water in the materials.

A certain amount of heat energy is required to remove the water in the materials. This method usually uses air to dry the material. The air is preheated and sent to the dryer to transfer heat to the material, so that the water in the material evaporates to form water vapor, which is brought out of the dryer with the air.

The material can be heated and dried to remove the combined water in the material, so as to achieve the water content required by the product or raw material. This method can be applied to a variety of industries, and it is also one of the simplest methods to meet the requirements.

3. Chemical dehumidification method: this method uses hygroscopic agent to remove a small amount of moisture in gas, liquid and solid materials. Due to the limited dehumidification capacity of hygroscopic agent, it is now only used to remove trace moisture in materials. Therefore, this method is rarely used in production.

More detailes on dryer, go to https://www.fertilizer-plants.com/rotary-drum-dryer/

Powder Fertilizer VS Granular One Which One is Better for Plants?

Organic fertilizer is a kind of organic fertilizer made from poultry manure, combined with fermentation bacteria, straw and other auxiliary materials, using traditional fermentation methods or organic fertilizer production equipment.

For commercial organic fertilizers on the market, two more popular forms of finished organic fertilizers are powdered and granular. What is the processing technology of powdery organic fertilizer and granular organic fertilizer? Which is better?

Bio Fertilizer Plant Design
Bio Fertilizer Plant Design

How to make powder fertilizer? Here are machines and solutions for your reference:https://organicfertilizerplants.com/

Processing technology of granular organic fertilizer:

The equipment used for granular organic fertilizer processing and production include: fermentation dumper, pulverizer, fertilizer disc granulator, screening machine and packaging machine
The fermented fertilizer is crushed by a pulverizer, and then the organic fertilizer particles are produced by a disk fertilizer granulator.

The organic fertilizer particles are screened by a screening machine, dried, and finally transported to the discharge bin for packaging, weighing and sealing.

Processing technology of powdery organic fertilizer:

The production line of powdery organic fertilizer needs to purchase equipment: fermentation tipping machine, pulverizer, packaging machine, etc.

The advantages of powdery organic fertilizer are: less investment in production and manufacture;

It has better fusion with roots, wider diffusion range, faster root fertility effect and faster absorption

Disadvantages:

It is easy to raise dust, get damp and caking during construction.

Advantages of granular organic fertilizer

Some inorganic components can be added to fertilizer to improve fertility. It’s more convenient to apply.
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Humic acid + fertilizer! what is it?

How to make organic fertilizer granules? Go to https://organicfertilizerplants.com/organic-fertilizer-granulation-machine/