Method for manufacturing compound fertilizer through double slurry granulation

A compound fertilizer and slurry technology, applied in fertilizer mixtures, fertilization devices, applications, etc., can solve the problems of low particle strength and low granulation rate, and achieve the effects of high particle strength, increased granulation rate, and reduced load.

Pending Publication Date: 2019-06-25
李占文
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention provides a method for producing compound fertilizer by double-mate...

Method used

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Embodiment 1

[0032] This embodiment provides a method for manufacturing compound fertilizer by double slurry granulation.

[0033] A method for making compound fertilizer by double-material slurry granulation, comprising the following steps:

[0034] S1, add granular urea into the urine melting tank to make urea molten slurry, keep the urea concentration at 85%, and the temperature is 110°C;

[0035] S2, put urea, sulfuric acid and water into the reaction device according to the molar ratio of 3.65:1:1 for stirring configuration, real-time monitoring of the reaction temperature in the reaction device, when the reaction is severe and the temperature rises quickly, turn on the heat exchanger Lower the temperature and keep the reaction temperature at 50°C to make a sulfuric acid urea slurry, the temperature of the prepared sulfuric acid urea slurry is at 55°C;

[0036] S3, the urea molten slurry made in step S1 and the sulfuric acid urea slurry made in step S2 are sprayed into the inner bed ...

Embodiment 2

[0038] This embodiment provides a method for manufacturing compound fertilizer by double slurry granulation.

[0039] A method for making compound fertilizer by double-material slurry granulation, comprising the following steps:

[0040]S1, add granular urea into the urine melting tank to make urea molten slurry, keep the urea concentration at 90%, and the temperature is 120°C;

[0041] S2, put urea, sulfuric acid and water into the reaction device according to the molar ratio of 3.65:1:1 for stirring configuration, real-time monitoring of the reaction temperature in the reaction device, when the reaction is severe and the temperature rises quickly, turn on the heat exchanger Lower the temperature, keep the reaction temperature at 55°C, and make a sulfuric acid urea slurry, the temperature of the prepared sulfuric acid urea slurry is at 58°C;

[0042] S3, the urea molten slurry made in step S1 and the sulfuric acid urea slurry made in step S2 are sprayed into the inner bed of...

Embodiment 3

[0044] This embodiment provides a method for manufacturing compound fertilizer by double slurry granulation.

[0045] A method for making compound fertilizer by double-material slurry granulation, comprising the following steps:

[0046] S1, add granular urea into the urine melting tank to make urea molten slurry, keep the urea concentration at 95%, and the temperature is 127°C;

[0047] S2, put urea, sulfuric acid and water into the reaction device according to the molar ratio of 3.65:1:1 for stirring configuration, real-time monitoring of the reaction temperature in the reaction device, when the reaction is severe and the temperature rises quickly, turn on the heat exchanger Lower the temperature and keep the reaction temperature at 65°C to make a sulfuric acid urea slurry, the temperature of the prepared sulfuric acid urea slurry is at 60°C;

[0048] S3, the urea molten slurry made in step S1 and the sulfuric acid urea slurry made in step S2 are sprayed into the inner bed ...

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PUM

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Abstract

The invention relates to the technical field of compound fertilizer preparation, in particular to a method for manufacturing compound fertilizer through double slurry granulation. Sulfuric acid and granular urea react with water according to a certain proportion to generate high-viscosity sulfuric acid urea slurry, and the high-viscosity sulfuric acid urea slurry and urea molten slurry are sprayedinto an inner bed layer of a granulator jointly. The load of a drying system is lowered, and even if part of a formula is reduced and even stops being used, granulation steam can also be normally produced; the production capacity of a device is improved, the granulation rate of the granulator is increased, and the appearance smoothness and strength of granules are improved; and the granules are bonded through the high viscosity of a solution, and other basic materials of nitrogen, phosphorus and potassium in the granulator, and subjected to normal production processes such as drying, screening, cooling and packaging, and finally a compound fertilizer product is formed.

Description

technical field [0001] The invention relates to the technical field of compound fertilizer preparation, in particular to a method for producing compound fertilizer by double-material slurry granulation. Background technique [0002] Compound fertilizer refers to chemical fertilizer containing two or more nutrient elements. Compound fertilizer has the advantages of high nutrient content, less auxiliary components and good physical properties. It is very important for balanced fertilization, improving fertilizer utilization rate, and promoting high and stable yield of crops. role. [0003] In the preparation of compound fertilizers, there are conventional granulation process, sulfur-based ammoniation process and urine spray granulation process, but these three processes have their fixed shortcomings. Agglomerate process: The product particle strength and surface gloss are generally not as good as other processes, and low-to-medium concentration products are not easy to disint...

Claims

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Application Information

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IPC IPC(8): C05G3/00
Inventor 李占文张思维张敬旭崔涛王宇
Owner 李占文
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