Dual-slurry ammonization granulation compound fertilizer production technology

A production process and compound fertilizer technology, applied in fertilizer mixtures, fertilization devices, applications, etc., can solve the problems of low nitrogen content, low production efficiency, and long time spent in the dechlorination process, so as to achieve complete dechlorination and increase production efficiency , The effect of improving the pass rate

Inactive Publication Date: 2012-07-25
SHANDONG HUAKEN FERTILIZER IMPORT & EXPORT
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AI Technical Summary

Problems solved by technology

[0002] The sulfur-based compound fertilizer produced by the traditional ammonification granulation process often has a low nitrogen content (12.5% ​​to 13.5%), and the dechlorination process takes a long time and the production efficiency is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0007] (1) Secondary dechlorination at low temperature

[0008] Pump a certain amount of concentrated sulfuric acid into the dechlorination tank, then add potassium chloride into the silo with an elevator, and evenly feed it into the dechlorination tank from the feed port on the top of the dechlorination tank through a screw feeder. React with concentrated sulfuric acid to generate potassium bisulfate and hydrogen chloride gas. The chemical reaction equation of this reaction is: KCl+H 2 SO 4 =KHSO 4 +HCl↑During the dechlorination process, the temperature of the reaction material is controlled between 125°C and 135°C. The heating method adopts two methods: indirect heating by steam and direct injection of steam into the dechlorination tank for heating. The direct injection heating method is Mainly, supplemented by indirect heating, the heating method is adjusted and converted according to the water content of the material. The advantage of this is that the water content of th...

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Abstract

The invention discloses a dual-slurry ammonization granulation compound fertilizer production technology, which is characterized by high nitrogen content and adjustable available nutrients. The technology comprises the following steps: 1, carrying out secondary dechlorination at low temperature; 2, dissolving phosphorus and mixing slurries; 3, cooling and absorbing; 4, melting and dissolving urea; 5, aminating and granulating; 6, drying and cooling; 7, screening and smashing; and 8, packaging. By using the invention, nitrogen content of sulfanyl compound fertilizers rises to 25% from 13%, recycle ratio reduces to 20-30% from 40-50%, yield of single-pass granulation in a granulator is greatly improved, dechlorination time is shortened to 1h from over 2h by adopting the secondary dechlorination technology, the dechlorination is thorough, and the production efficiency is greatly improved.

Description

technical field [0001] The invention relates to a production process of double-slurry ammonification granulation compound fertilizer. Background technique [0002] The sulfur-based compound fertilizer produced by the traditional ammonification granulation process often has a low nitrogen content (12.5% ​​to 13.5%), and the dechlorination process takes a long time and the production efficiency is low. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a sulfur-based high-nitrogen product compound fertilizer production process with high nitrogen content, short dechlorination process time and high production efficiency. [0004] In order to solve the above-mentioned technical problems, the double-slurry ammonification granulation compound fertilizer production process of the present invention comprises the following steps: [0005] 1. Secondary dechlorination at low temperature; 2. Dissolving phosphorus and mixing slu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G1/00
Inventor 高建国梁庆国李锦选
Owner SHANDONG HUAKEN FERTILIZER IMPORT & EXPORT
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