NPK compound fertilizer granulation production line process

NPK compound fertilizer has the advantages of good appearance, high fertilizer efficiency, uniform coating and strong wear resistance. It can provide sulfur nutrition after degradation of the film, and is pollution-free, which meets the requirements of environmentally friendly fertilizer. NPK compound fertilizer has various kinds of slow-release fertilizers and processing forms. This NPK compound fertilizer granulation production process adopts the method of coating, including sulfur coating, resin coating and so on. A large number of field fertilizer efficiency experiments have proved that compared with non-coated fertilizer, the yield can be increased by 6-10% at the same level of economic input. At the same yield level, the amount of fertilizer application can be reduced by 1/3 and the utilization rate of fertilizer can be increased by 10%. In terms of ecological and environmental benefits, NPK compound fertilizer can effectively reduce the impact of nitrate content in groundwater, reduce eutrophication caused by water pollution, and improve the safety and quality of agricultural products.

This compound fertilizer production process has wide adaptability, and can be used for granulation of various raw materials such as compound fertilizer, medicine, chemical feed, coal, metallurgy, etc. and can produce compound fertilizer of various concentrations and types (including organic fertilizer, inorganic fertilizer, etc.). The equipment of NPK compound fertilizer generally includes batching system, crusher, mixer, conveying machine, fertilizer granulator machine, rotary drum screener and so on.

NPK Fertilizer Production Process

1. Ingredients of raw materials: Urea, ammonium nitrate, ammonium chloride, ammonium sulfate, ammonium phosphate and other raw materials are equipped in a certain proportion (according to market demand and soil test results in different places).   

2. Material agitation: Mix the raw materials evenly to improve the overall fertilizer efficiency of the fertilizer granules.   

3. Granulation of raw materials: The raw materials with uniform stirring are conveyed to the fertilizer granulator machine for granulation.   

4. Granules drying: The granules made by the granulator are conveyed into the dryer, and the moisture contained in the granules is dried to increase the strength of the granules and facilitate their preservation.

5. Granules cooling: Cooling the granule to the normal temperature and ready to packing.

6. Primary screening: Screening the powder and particles.

7. Secondary screening: the final compound fertilizer granules were screened, the smaller granules were conveyed to granulating, the bigger granules were sent to crushing.

8. Coating and packaging: The surface of fertilizer particles is coated to release the available nutrients slowly after fertilizer is applied to the soil, so as to prolong the fertilizer efficiency. Packing final products in bags.

Feature of NPK compound fertilizer granulation production equipment

Automatic Batching System

Each proportioning and weighing belt conveyor is strictly coordinated and controlled, and the level and flow are monitored and regulated timely and accurately. The proportioning system can automatically process the collected signals and output them to the corresponding control quantity. In the process of automatic proportioning production, the main material and auxiliary material are matched in a certain proportion, and the material conveyed by belt conveyor is measured by electronic belt scale.

Rotary Drum Granulator

Rotary drum granulator used for hot and cold granulation and high, medium and low concentrations of mass production of compound fertilizer. It has the feature of high pelletizing rate, high strength of round particles. The drum granulator shell adopts special rubber or acid-resistant stainless steel lining. The raw materials are not easy to bond to the cylinder wall and play an anti-corrosion role. The rotary granulator has large output, good economic benefit and resource saving.

Drum Dryer Machine

In order to improve the productivity of the dryer machine, the larger diameter and length of the dryer are usually chosen to increase the effective volume of the drum, and prolong the drying time of the material. Dryer machine of different specifications must be equipped with corresponding oil (gas) fired stove and draft fans with corresponding air volume.

Feature

1. NPK compound fertilizer dryer machine has a high degree of mechanization, a large production capacity, and can run continuously.

2. The structure of NPK compound fertilizer dryer machine is excellent and simple. The material runs smoothly through the barrel resistance and is easy to operate.

3. NPK compound fertilizer dryer machine has less malfunction, low maintenance cost and low power consumption.  

4. NPK compound fertilizer dryer machine has wide application range and good drying uniformity. 

Rotary Drum Screener

Rotary drum screener machine is common equipment in fertilizer production, mainly used for separating the returned materials and finished granules, realize the classification of the end products, and even classify the end products. The drum screener machine mainly includes the frame, classification chamber, sieving rotor structure, a main reducer and a main motor.

Zhengzhou Huaqiang Heavy Industry Technology Co.Ltd. was founded in 2000, is professional fertilizer machine manufacturers, specializing in agricultural environmental protection technology development, has long been committed to the production of high, medium and low compound fertilizer production equipment. Huaqiang Fertilizer Machine Manufacturers providing customers with NPK fertilizer production process design, equipment manufacturing, installation and commissioning, equipped with a comprehensive one-stop service, fertilizer equipment exported to many countries. After-sales service has won unanimous praise from customers. We warmly welcome partners from all over the world to guide business negotiation.