Production method of coated organic fertilizer and special equipment thereof

Abstract

The invention relates a production method of coated organic fertilizer and special equipment thereof, wherein the production method is mainly applied to the production of organic granular fertilizer and mixed organic-inorganic granular fertilizer. The method includes the following steps of: mixing, stirring, fermenting in windrow form, turning, thoroughly decomposing, drying, roughly grinding, screening, finely grinding, dosing, pelletizing, drying, cooling, filtrating to different grade and coating and drying to finally obtain special fertilizer, organic fertilizer powder, organic granular fertilizer and coated organic fertilizer and the like. During whole production process of the invention, the temperature of drying is controlled at 60 to 70 DEG C and the humidity of drying is controlled at 30% to 35% so that the vast majority of microorganisms survive and the biological fertilizer effects of the product are obvious. The method provided by the invention grinds the fertilizer with 30% to 40% of moisture content by using a special fine grinder, improves production efficiency by ten times, substantially improves grinding quality of fertilizer and controls the granular size of the fertilizer to be 1 mm or below.

Description

(1) Technical field [0001] The invention relates to a production method of coated organic fertilizer and special equipment thereof. It is mainly used in the production of organic granular fertilizers and organic-inorganic mixed granular fertilizers. (2) Background technology [0002] Fertilizers on the market are usually divided into special fertilizers, ordinary fertilizers (powder), ordinary fertilizers (granules), coated fertilizers and BB fertilizers (also called blended fertilizers). [0003] The production process of granular fertilizer directly affects the production efficiency and quality of fertilizer. The traditional fertilizer production process is usually: batching→stirring→disk granulation→twice high-temperature drying (complete drying)→screening→qualified products are graded and packaged in storage→unqualified products→enter the pulverizer for re-crushing and then enter the next step cycle. There are following deficiencies in this kind of technology: [000...

AI Technical Summary

Problems solved by technology

[0005] 2. Fertilizer granules adopt the traditional disc granulation process, and the granulation quality and granulation efficiency are poor

[0006] 3. Due to the poor quality of granulation, a large amount of coarse material needs to be further crushed during fertilizer screening, and the production efficiency is low. At the same time, the granulation quality of the recycled material is obviously reduced when the recycled material is granulated again.

[0007] 4. The use of ordinary pulverizers, mainly through ring grinding granulation or flat grinding granulation or throwing sieve, etc., is prone to block passages during pulverization, resulting in shutdowns due to failures.

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