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Method for producing compound fertilizer by slurry mixing method

A compound fertilizer and slurry technology, applied in nitrogen fertilizer, potash fertilizer, phosphate fertilizer, etc., can solve the problems of large steam consumption, troublesome cleaning, blocked nozzles, etc., to reduce steam consumption, improve cooling efficiency, and improve the effect of ball forming.

Pending Publication Date: 2022-01-21
广西鄂中肥业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the compound fertilizer preparation process, the commonly used compound fertilizer granulation method is the acid granulation method. This granulation method requires the use of tubular reactors. The use of tubular reactors has played a very good role in the production of compound fertilizers. However, the viscosity of the slurry formed by the reaction of amino acid is high, which is easy to cause pipe blockage or nozzle blockage, and it is quite troublesome to clean up. In addition, there is a problem of large amount of steam used only to wet the solid raw material with steam, and the steam comes from coal. The heating and evaporation of water by combustion increases the energy consumption of compound fertilizer production

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  • Method for producing compound fertilizer by slurry mixing method
  • Method for producing compound fertilizer by slurry mixing method
  • Method for producing compound fertilizer by slurry mixing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A method for producing compound fertilizer by slurry mixing method, comprising the following steps:

[0057] 1) The solid raw materials ammonium chloride, monoammonium phosphate, and potassium chloride are sent to the granulator in proportion after being weighed, and the liquid raw materials liquid ammonia, sulfuric acid solution, and monoammonium sulfate are respectively sent to the granulator in proportion solution, and feed steam for granulation to obtain material granules; wherein, the mass ratio of ammonium chloride, monoammonium phosphate, and potassium chloride is 1:1:5, and the amount of liquid ammonia added is the sum of the mass of solid raw materials 1%, the addition of sulfuric acid solution is 0.5% of the sum of the solid raw materials quality; the mass fraction of the sulfuric acid solution is 50%; the addition of the monoammonium phosphate solution is 1% of the sum of the solid raw materials quality;

[0058] 2) Drying, cooling, and sieving the material p...

Embodiment 2

[0061] A method for producing compound fertilizer by slurry mixing method, comprising the following steps:

[0062] 1) The solid raw materials ammonium chloride, monoammonium phosphate, and potassium chloride are sent to the granulator in proportion after being measured and weighed, and the liquid raw materials liquid ammonia, sulfuric acid solution, and monoammonium phosphate are respectively sent to the granulator in proportion solution, and feed steam for granulation to obtain material granules; wherein, the mass ratio of ammonium chloride, monoammonium phosphate, and potassium chloride is 1:5:1, and the amount of liquid ammonia added is the sum of the mass of solid raw materials 5%, the addition of sulfuric acid solution is 1% of the sum of the mass of solid raw materials; the mass fraction of sulfuric acid solution is 80%; the addition of the monoammonium phosphate solution is 10% of the sum of the mass of solid raw materials;

[0063] 2) Drying, cooling, and sieving the ...

Embodiment 3

[0066] A method for producing compound fertilizer by slurry mixing method, comprising the following steps:

[0067] 1) The solid raw materials ammonium chloride, monoammonium phosphate, and potassium chloride are sent to the granulator in proportion after being measured and weighed, and the liquid raw materials liquid ammonia, sulfuric acid solution, and monoammonium phosphate are respectively sent to the granulator in proportion solution, and feed steam for granulation to obtain material granules; wherein, the mass ratio of ammonium chloride, monoammonium phosphate, and potassium chloride is 1:5:1, and the amount of liquid ammonia added is the sum of the mass of solid raw materials 5%, the addition of sulfuric acid solution is 1% of the sum of the solid raw materials; the mass fraction of sulfuric acid solution is 80%; the mass fraction of the monoammonium phosphate solution is 80%, the addition of the monoammonium phosphate solution 5% of the sum of the mass of solid raw mat...

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Abstract

The invention discloses a method for producing a compound fertilizer by a slurry mixing method, which comprises the steps of 1) metering and weighing a solid raw material, feeding the weighed solid raw material into a granulator according to a ratio, feeding a liquid raw material into the granulator according to a ratio, and introducing steam for granulation to obtain material particles; 2) drying, cooling and screening the material particles to obtain screened particles; and (3) feeding the screened particles into a coating barrel, adding anti-caking oil and anti-caking powder, and coating to obtain the compound fertilizer. The method disclosed by the invention has the characteristics of reducing the use of steam, improving the balling effect, improving the production efficiency, avoiding the use of a tubular reactor and the like.

Description

technical field [0001] The invention belongs to the field of compound fertilizer production. More specifically, the present invention relates to a method for producing compound fertilizer by slurry mixing method. Background technique [0002] In the compound fertilizer preparation process, the commonly used compound fertilizer granulation method is the acid granulation method. This granulation method requires the use of tubular reactors. The use of tubular reactors has played a very good role in the production of compound fertilizers. However, the viscosity of the slurry formed by the reaction of amino acid is high, which is easy to cause pipe blockage or nozzle blockage, and it is quite troublesome to clean up. In addition, there is a problem of large amount of steam used only to wet the solid raw material with steam, and the steam comes from coal. The heating and evaporation of water by combustion increases the energy consumption of compound fertilizer production. Conte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/30C05G5/12C05G5/30
CPCC05G3/30C05G5/12C05G5/30C05B7/00C05C3/00C05D1/02
Inventor 陈勇张文覃定勇赵颖
Owner 广西鄂中肥业有限公司
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