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Process for producing compound fertilizer by tower granulation

A compound fertilizer and high-tower granulation technology, applied in fertilizer forms, fertilizer mixtures, sustainable manufacturing/processing, etc., can solve the problems of increasing operating costs, increasing investment, increasing the height of granulating towers, etc., to reduce investment and reduce investment. The effect of running cost, energy saving and investment reduction

Inactive Publication Date: 2008-02-06
GUANGDONG DAZHONG AGRI SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The original high-tower granulation production process of compound fertilizer is to raise a certain amount of raw material nitrogen fertilizer to the top of the tower, melt it in the melting tank on the top of the tower, and then mix it with the auxiliary materials in the reaction tank that has been measured and lifted to the top of the tower. , the granulator granulates free fall to the bottom of the tower to get the finished product; the defects of this process are:
[0003] 1. Due to the melting at the top of the tower, melting equipment needs to be installed on the top of the tower, which will inevitably increase the height of the prilling tower and increase investment;
[0004] 2. Due to the melting at the top of the tower, at least two elevators need to be installed at the bottom of the tower, one to lift up the nitrogen fertilizer raw material to be melted, and the other to lift up other auxiliary materials; this increases investment and increases operating costs

Method used

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  • Process for producing compound fertilizer by tower granulation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The concentration is 100%, the temperature is 43% of the urea solution of 120 ℃ pumped into the top mixing reaction tank with 12% monoammonium phosphate, 32% potassium chloride (potassium sulfate), 13% filler, medium and trace elements , The pigment is mixed and stirred to react, and enters the granulator to granulate. Spray freely to the bottom of the tower, after cooling and sieving, a compound fertilizer of φ2-4.75mm can be obtained. The product analysis result is N20.98%, P 2 o 5 6%, K 2 O19.2%, total nutrient is 46.18%. The fertilizer moisture is 0.8%. The strength is 20N, and the yield rate is over 90%.

Embodiment 2

[0041] Pump 39% urea solution with a concentration of 100% and a temperature of 125°C into the tower top mixing reaction tank, mix and stir with 10% monoammonium phosphate, 19% potassium chloride, 32% filler, medium and trace elements, and pigments React, enter the granulator for granulation. Spray freely to the bottom of the tower, after cooling and sieving, a compound fertilizer of φ2-4.75mm can be obtained. The product analysis results are N18.94%, P2O5%, K2O11.4%, and the total nutrient content is 35.34%. The fertilizer moisture is 0.9%. The strength is 19N, and the yield is over 90%.

Embodiment 3

[0043] Pump 46% of the ammonium nitrate solution with a concentration of 100% and a temperature of 170°C into the tower top mixing reaction tank and react with 8% monoammonium phosphate, 40% potassium sulfate, 6% filler, medium and trace elements, and mix and stir , into the granulator for granulation. Spray freely to the bottom of the tower, after cooling and sieving, a compound fertilizer of φ2-4.75mm can be obtained. The product analysis result is N15.5%, P 2 o 5 5.8%, K 2 O20%, the total nutrient is 41.3%. The fertilizer moisture is 0.85%. The strength is 18N, and the yield rate is over 90%.

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Abstract

The invention discloses a high tower making grain technics for producing compound fertilizer, which is characterized in that the urea saltpeter ammonium phosphorus is smelted under the tower through measuring, then enters the mixing reacting groove on the tower top by a pump, then is mixed with measured monoammonium phosphate, potassium chloride, lemery, filler, middle microelement and paint, finally, enters the granulator to be granulated. The invention makes use of the pump to put the urea (saltpeter ammonium phosphorus) material serum to the top of the tower, thereby, saving energy, decreasing investment, being convenient for service and saving cost.

Description

technical field [0001] The invention relates to a process for producing compound fertilizer by high-tower granulation Background technique [0002] The original high-tower granulation production process of compound fertilizer is to raise a certain amount of raw material nitrogen fertilizer to the top of the tower, melt it in the melting tank on the top of the tower, and then mix it with the auxiliary materials in the reaction tank that has been measured and lifted to the top of the tower. , the granulator granulates free fall to the bottom of the tower to get the finished product; the defects of this process are: [0003] 1. Due to the melting at the top of the tower, melting equipment needs to be installed on the top of the tower, which will inevitably increase the height of the prilling tower and increase investment; [0004] 2. Due to the melting at the top of the tower, at least two elevators need to be installed at the bottom of the tower, one to lift up the nitrogen f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00C05G5/00
CPCY02P20/10
Inventor 林小明张成文刘奋安
Owner GUANGDONG DAZHONG AGRI SCI CO LTD
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