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At present, the use of organic waste to produce organic fertilizer through biological fermentation has been rapidly developed, because it can realize the harmless and resourceful treatment of organic waste. However, most of the organic fertilizers obtained by biological fermentation are in the form of coarse powder or irregular small pieces, which are very inconvenient to use, especially unfavorable for large-area machine-sowing. Today, the FPC organic fertilizer manufacturer will explain how the organic fertilizer production line compresses and granulates the organic fertilizer.

The existing technologies for making the coarse powder or irregular small block organic fertilizer after biological fermentation into spherical granular organic fertilizer mainly include the following:

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• Some manufacturers use traditional disc or drum granulation, and need to dry coarse powder or irregular small pieces of organic fertilizer (moisture <15%) and pulverize it into very fine (more than 100 mesh) powder , and then add binder and inorganic fertilizer, and the amount of binder and inorganic fertilizer added in the organic fertilizer cannot be greater than 30%. Although this method can be made into spherical particles, because the organic fertilizer in the processing process will be first Sufficient precipitation is crushed, water is added to granulate and then dried, repeated many times, so the organic fertilizer processing cost is quite high, and due to the low density of organic fertilizer, the particle strength is low, which is not conducive to storage, transportation and machine sowing.
• There are also some manufacturers who first dry the coarse powder or irregular small pieces of organic fertilizer to a moisture content of only 20-25%, and then use a flat die extrusion granulator or a counter-roll extrusion granulator to dry the fertilizer. The organic fertilizer is extruded into columnar or flat spherical particles. Although this method is more convenient to use, the fluidity is not very good, it is not suitable for machine sowing, and the appearance is poor and the appearance is not good.

• There are also some manufacturers who extrude coarse powder or irregular small pieces of organic fertilizer into short columnar particles with a flat die extrusion pelletizer(due to high moisture and high fiber content, the columnar particles also have certain characteristics. Plasticity), then polished and formed into spherical particles, and then the spherical particles are dried, cooled and screened to obtain qualified particles. In this method, the raw materials do not need to be treated, the order of moisture is reduced, and the production cost is greatly reduced, but this method also has some fatal The weakness is that the organic fertilizer is easy to be arched, easy to block and easy to bond equipment, and at the same time, the output is small and the power consumption of the extrusion process is high.

Therefore, in summary, the use of collision granulator to produce organic granular fertilizer has the advantages of low production cost, uniform product particle size, high strength, good fluidity, favorable for long-term storage and transportation, and suitable for machine sowing. That is to say, the performance of the products produced in this way is very good.

The flat mode extrusion granulator is mainly composed of a feed hopper, a pressing roller, a die plate, a gearbox, a motor and a frame. The electric motor transmits the power to the gearbox and is driven by a set of bevel gears to change the direction of rotation and drive the flat die or the pressure roller to rotate to realize the relative movement of the pressing roller and the flat die. The powder material is squeezed into the die hole of the flat die, and the cutting knife rotates at low speed under the flat die hole to cut the extruded columnar fertilizer according to the required length. The flat die extrusion equipment has simple structure and strong adaptability.

The granule composition is uniform and the shape is neat, which is suitable for granulation of carbon-based fertilizer with a lot of fiber.

The moisture content in the material has a greater impact on the pressure effect of the flat mode. The study found that the moisture in the mixture should be controlled between 8% and 10%. It is appropriate to control the moisture content in the mixture. The surface is rough, the strength is not high, the output is low, and the load of the main machine is large. If the moisture content is too high, the particles are easy to deform and squeeze into agglomerates, which will cover the entire granulation chamber in severe cases. The production capacity of the flat die fertilizer granulator is generally 0.5~7.0th, and the power consumption is 18.5~110.0kw. From the stand-alone point of view, the unit energy consumption is higher than that of roller compactor dry granulator.

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