BB fertilizer production method and special device thereof

Abstract

The invention relates to a BB fertilizer production method and a special device thereof, mainly used for production of organic grain fertilizers and organic-inorganic mixed grain fertilizers. The method includes the following technical steps: mixing, stirring, windrow composting type fermentation, turning, completely decomposing, drying, coarse grinding, screening, fine crushing, dosing, pelleting, cooling, classified selecting, coated drying and dosing. Finally, a special fertilizer, organic type fertilizer powder, organic type fertilizer grains, the BB fertilizer and the like can be produced. In the whole production process of the invention, drying temperature is controlled to be in a range of 60-70 degrees centigrade, and drying humidity is controlled to be in a range of 30%-35%, so that most of microbes can survive, and biologic fertilizer efficiency is high. A special fine grinding mill is used for grinding the fertilizer with moisture content of 30%-40%, so that production efficiency is improved 10 times, fertilizer grinding quality is greatly improved, and the grinded fertilizer can be controlled to be not more than 1 mm.

Description

(1) Technical field [0001] The invention relates to a method for producing BB 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 organic fertilizers (powder), ordinary organic fertilizers (granules), coated organic 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 technol...

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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