Small-particle fertilizer centrifugal granulation device, granulation system and granulation process thereof

Abstract

The invention discloses a small-particle fertilizer centrifugal granulation device, a granulation system and a granulation process thereof, and belongs to the field of fertilizer production. The small-particle fertilizer centrifugal granulation device comprises an upper cover plate provided with fertilizer melt liquid input ports and a lower cover plate, wherein the middle of the lower cover plate is in driving connection with an output shaft of a rotating motor; a flow guide table is arranged on the inner side surface, located in an interval space, of the lower cover plate; the flow guide table is a rotary symmetric body around the central shaft, an included angle alpha is formed between the surface of the flow guide table and the central shaft, and the alpha is larger than or equal to 30 degrees and smaller than 90 degrees; a plurality of radially distributed flow deflectors or indexing pins are arranged between the upper cover plate and the lower cover plate. The centrifugal granulation process is adopted to produce small-particle fertilizer having a size of 0.5-2.5 mm, so that the requirements of production and irrigation facilities are met; the design of centrifugal granulation holes is optimized, and material blockage is avoided; different types of flow guide tables, flow guide sheets and indexing pins are made, matching is carried out according to the characteristics of different types of fertilizer slurry, and it is guaranteed that all kinds of fertilizer slurry can achieve the optimal granulation effect.

Description

technical field [0001] The invention relates to the field of fertilizer production, in particular to a small particle fertilizer centrifugal granulation device, a granulation system and a granulation process. Background technique [0002] Fertilizers provide essential nutrients for crop cultivation today, and can be used to improve soil properties and increase soil fertility. It is one of the material bases of modern agricultural production. At present, most of the fertilizer particles in the market are 1.00mm-4.75mm or 3.35mm-5.60mm particle size products, and with the development of various fertilization technologies, formula processes and fertilization facilities, in practical applications, small particle fertilizers dissolve quickly, It can better meet the needs of irrigation facilities, so the market demand for 0.5-2.5mm small granular fertilizers is increasing day by day. [0003] In the prior art, such as adopting patents "[CN] Method, system and compound fertilizer ...

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Problems solved by technology

[0003] In the prior art, such as adopting patents "[CN] Method, system and compound fertilizer produced by high-tower granulation-CN108707000A", "CN] a method of high-tower granulation to produce urea-based compound fertilizer-CN102584395A", "[CN] Method and equipment for producing granular compound fertilizer by high-tower granulation-CN1213001C" is produced by high-tower granulation technology, and the screen in the high-tower granulator is reduced from 2-4mm to 1-2mm. Small particle materials, but there will be the following problems: (1) Impurities such as infusible matter exceeding the size of the sieve hole in the raw material will block the sieve hole or accumulate inside the sieve mesh, resulting in frequent cleaning, and the infusible matter impurities include raw materials Medium-hard particles, rust impurities in equipment and unmelted matter produced during the pulping process, and all kinds of unmelted matter cannot be completely removed during production; (2) The tower height required for the production of 0.5-2.5mm fertilizer particles is much lower The tower height required for the production of 1.00mm-4.75mm or 3.35mm-5.60mm fertilizer granules is about 1 / 8-1 / 3 of its height. It is a great waste to produce such products with the original high tower system

[0005] In the prior art, the Chinese patent CN110449089A discloses an atomizing rotary spray pan for fertilizer production. The rotary spray pan of this scheme initially provides an atomization spray pan that can be used in the field of fertilizer granulation, but because it is the first generation The product has many deficiencies in its atomization effect, such as easy accumulation of material, poor atomization uniformity in all directions, and difficulty in controlling the atomization projection path, etc.

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