How to compress and granulate organic fertilizer in organic fertilizer production line
Date:2020/04/20
With the development of environmental protection and organic agriculture, the use of organic wastes to produce organic fertilizers through biological fermentation has been rapidly developed in China, making the treatment of organic wastes harmless and resourceful. However, most of the organic fertilizer obtained by biological fermentation is coarse powder or irregular small pieces, which is very inconvenient to use and is particularly unfavorable for large-area machine broadcast. It is the key to solve the large-scale promotion and use of organic fertilizers by making organic powders obtained from biological fermentation into coarse powder or irregular small pieces of organic fertilizers into spherical granular organic fertilizers.
1. Some manufacturers use traditional disc or drum organic fertilizer machine, they need to dry the coarse powder or irregular small pieces of organic fertilizer (moisture <15%), and crush it into a very fine (greater than 100 mesh) powder , And then add the binder and inorganic fertilizer, and the amount of binder and inorganic fertilizer added in the organic fertilizer can not be greater than 30%, although this method can be made into spherical particles, but because the organic fertilizer manufacturing process will be first Fully decomposed and crushed, granulated by adding water and then dried, repeated many times, so the processing cost is quite high, and because of the low density of organic fertilizer, the strength of the particles is low, which is not conducive to storage, transportation and machine broadcasting.
2. There are also some manufacturers who firstly dry the coarse powder or irregular small organic fertilizer until the moisture content is only 20-25%, and then use a flat die extrusion granulator or a pair of roller extrusion granulator to dry The organic fertilizer is extruded into cylindrical or flat spherical particles. Although this method is more convenient to use, the fluidity is still not very good, it is not suitable for machine broadcast, and it has a poor appearance and bad selling.
3. There are also some manufacturers who use coarse powder or irregular small pieces of organic fertilizer to squeeze them into short cylindrical particles using a flat die extrusion granulator (due to high moisture and high fiber content, the cylindrical particles also have certain Plasticity), then polished to form spherical particles, and then dried and cooled and sieved the spherical particles to obtain qualified particles. In this method, the raw materials do not need to be processed, the moisture sequence is reduced, and the production cost is greatly reduced, but this method also has some fatal The weak point is that the organic fertilizer is easy to arch material, easy to block material and easy to bond equipment, at the same time, the output is small and the power consumption in the extrusion process is high.
Therefore, in summary, the organic fertilizer industry urgently needs to introduce a large-capacity, low-energy compression granulation equipment to overcome the traditional flat die extrusion granulator easy to arch material, easy to block material, easy to bond equipment, small output And the shortcomings of high power consumption in the extrusion process.