Method for producing chlorine-based high phosphorus compound fertilizer by ammoniation method

A technology for compound fertilizers and production methods, applied in fertilizer mixtures, fertilization devices, applications, etc., can solve the problems of poor product color, increased drying load, and low particle strength, and achieve smooth and round particles, reduce drying load, and strength high effect

Inactive Publication Date: 2011-05-04
天津芦阳肥业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned granulation production technology is a production method widely used in my country. The production process of this method is simple and the operation is easy to master. However, there is no chemical reaction between the raw materials in the production process. Due to the high water content of the material, the subsequent drying load will be increased, and the particle strength of the product is low, the product strength is between 8N-12N, the particles are not smooth, and the color of the product is not good due to the influence of fillers.

Method used

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  • Method for producing chlorine-based high phosphorus compound fertilizer by ammoniation method
  • Method for producing chlorine-based high phosphorus compound fertilizer by ammoniation method
  • Method for producing chlorine-based high phosphorus compound fertilizer by ammoniation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Example 1: 15-25-10 products

[0049] Gas ammonia (containing N 82.3%, mass percentage, the same below) 35 kg, after being metered, added to the drum granulator material layer, and at the same time, 110 kg of urea (including N46.2, added after crushing) was metered by the computer , Ammonium chloride (containing N23.5) 110 kg, powdered monoammonium phosphate (containing N 11%, P2O5 45%) 380 kg, weight superphosphate 200 kg (containing P2O5 38.5%), potassium chloride (containing K2O56 %) 180 kg, the above powdered material is mixed with gas ammonia in the granulator, and the exothermic reaction of gas ammonia and heavy superphosphate, and the neutralization heat of gas ammonia and monoammonium phosphate are used for heating during the granulation process At the same time, increase the solubility of ammonium phosphate to meet the amount of liquid phase required for granulation, and replace steam with washing water from the granulation tail gas as the amount of liquid phase r...

Embodiment 2

[0050] Example 2: 13-22-10 products

[0051] 30 kg of gaseous ammonia (containing N 82.3%, mass percentage, the same below), after being metered, is added to the drum granulator material layer, and 290 kg of ammonium chloride (including N23.5) is added to the powder 320 kilograms of monoammonium phosphate (containing 11% N, 45% P2O5), 200 kilograms of superphosphate (containing 38.5% P2O5), and 180 kilograms of potassium chloride (containing K2O56%). Mixing in the granulator, the exothermic reaction of gas ammonia and double superphosphate, and the neutralization heat of gas ammonia and monoammonium phosphate reaction are used to heat the material during the granulation process, and the solubility of ammonium phosphate is improved to meet the granulation The required liquid phase quantity, and the granulation tail gas washing water is used to replace steam as the liquid phase quantity required for granulation. The temperature of the material in the drum granulator is controlled a...

Embodiment 3

[0052] Example 3: 17-17-17 High Phosphorus Products

[0053] Ammonia gas (containing N 82.3%, mass percentage, the same below) 30 kg, after being metered, added to the drum granulator material layer, while adding urea (containing N46.2, added after crushing) 200 Kg, 90 kg of ammonium chloride (containing N23.5), 290 kg of powdered monoammonium phosphate (containing N 11%, P2O5 45%), 100 kg of superphosphate (containing P2O5 38.5%), potassium chloride (containing K2O56%) 300 kg, the above-mentioned powdery materials are mixed with gas ammonia in the granulator, and the exothermic reaction of gas ammonia and heavy superphosphate, and the neutralization heat of gas ammonia and monoammonium phosphate are fully utilized in the granulation process. Heat the material while increasing the solubility of ammonium phosphate to meet the liquid phase quantity required for granulation, and replace steam with the granulation tail gas washing water as the liquid phase quantity required for granu...

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Abstract

The invention discloses a method for producing a chlorine-based high phosphorus compound fertilizer by an ammoniation method. The method is characterized by directly introducing gas ammonia to a material layer of a rotary drum granulator to increase the neutralization degree of monoammonium phosphate, granulating gas ammonia with other powdered fundamental fertilizers containing nitrogen, phosphorus and potassium and obtaining the compound fertilizer containing nitrogen, phosphorus and potassium through drying, cooling, screening and enveloping after granulation. The method has the following advantages: the heat producing reaction between the gas ammonia and double superphosphate and heat of neutralization generated by the reaction between the gas ammonia and the monoammonium phosphate are fully used of to maintain the temperature of the materials, and the solubility of ammonium phosphate salt is improved to satisfy the liquid phase quantity needed by granulation; the higher granulation rate can be ensured without adding other adhesives, thus lowering the input cost of the materials; and the moisture of the materials to be granulated is obviously reduced, thus reducing the drying load and saving plenty of energy.

Description

Technical field [0001] The invention relates to a high-phosphorus compound fertilizer production method, in particular to a method for preparing a ternary compound fertilizer containing nitrogen, phosphorus and potassium by adding chemical raw material ammonia into a granulation method production process. Background technique [0002] At present, with the development of modern agriculture, the development of compound fertilizers at home and abroad dominates the fertilizer industry. In developed countries in the fertilizer industry, the consumption of compound fertilizers has accounted for 70% to 80% of the fertilizer consumption. Compound fertilizer is mainly composed of basic fertilizers containing nitrogen, phosphorus, and potassium, such as urea, ammonium chloride, ammonium phosphate, potassium chloride, etc., after being mixed, in the granulator, at a certain temperature and liquid phase, Rely on its own adhesive force or add an appropriate amount of binder, agglomerate into ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
Inventor 杨金宝杨桂双李云利杨长东
Owner 天津芦阳肥业股份有限公司
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