Multi-stage variable speed tail-drying mixed fertilizer granulation production process and its special production equipment

Abstract

Multi-stage variable speed tail-drying mixed fertilizer granulation production process and its special production equipment, including batching system, crusher, drum granulator, disc granulator, primary drying cylinder, primary cooling cylinder, primary Primary screening machine, secondary drying cylinder, secondary cooling cylinder, secondary screening machine, coating machine and finished product warehouse, batching system, crusher, drum granulator, disc granulator, primary drying cylinder , a primary cooling cylinder, a primary screening machine, a secondary drying cylinder, a secondary cooling cylinder, a secondary screening machine, a coating machine and a finished product warehouse are connected in sequence. The multi-stage variable-speed end-drying mixed fertilizer granulation production process and its special production equipment described in the present invention can make fertilizer granules have high pelleting rate, good appearance, low water content, high roundness, high strength, hardened parts, and high yield. , can produce organic fertilizers, inorganic fertilizers and organic-inorganic mixed fertilizers, solve the negative effects of conventional processes, fill in the gaps in the industry, and are very beneficial to popularization and use.

Description

technical field [0001] The invention relates to the field of fertilizer production equipment and technology, in particular to a multi-stage variable-speed end-drying mixed fertilizer granulation production process and special production equipment. Background technique [0002] The fertilizer produced by the fertilizer production line in the prior art has the disadvantages of low pelleting rate, poor appearance, high moisture, poor roundness, low strength, easy hardening, and low yield. Chinese invention patent CN101684051A discloses an organic-inorganic compound compound Fertilizer production process, organic raw materials are fermented and processed into ecological organic fertilizers, which are added to the crusher together with inorganic raw materials; after being crushed, they enter the drum granulator, and granulation is assisted by adding water, steam, and urine; the drum granulator The discharged material enters the disc granulator and continues to granulate; then the...

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Problems solved by technology

[0002] The fertilizer produced by the fertilizer production line in the prior art has the disadvantages of low pelleting rate, poor appearance, high moisture, poor roundness, low strength, easy hardening, and low yield. Chinese invention patent CN101684051A discloses an organic-inorganic compound compound Fertilizer production process, organic raw materials are fermented and processed into ecological organic fertilizers, which are added to the crusher together with inorganic raw materials; after being crushed, they enter the drum granulator, and granulation is assisted by adding water, steam, and urine; the drum granulator The discharged material enters the disc granulator and continues to granulate; then the granulated material is subjected to secondary drying, and the material is cooled; the cooled material is screened out of large particles; the sieved finished product is treated with anti-caking After that, it can be packaged and delivered to the factory. Using the above technical solutions to give full play to the advantages of the two granulation methods, solve the problems of poor product appearance and high moisture content in granulation

This kind of production process has the following disadvantages: first, screening is carried out after the first drying, lack of cooling treatment, because the finished product particles have a high temperature and are still in an unstable state, screening is carried out immediately after the first drying The finished product particles will be loose, the screening effect will be poor, and the yield and quality of the finished product will be reduced; secondly, the drying method is adopted in the past, that is, the drying temperature is decreasing from the direction of feeding to discharging. The disadvantage is that due to the high water content of the material particles to be dried, immediately encountering high temperature will make the particles into a water-melting state, resulting in loose deformation of the particles and affecting the quality of the finished product; To adjust the temperature, humidity and residence time required by the process

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