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Method for producing compound fertilizer through high-tower granulating, system and compound fertilizer

A compound fertilizer and high-tower granulation technology, which is applied in fertilizer mixtures, fertilization devices, and liquid droplet granulation, etc., can solve the problems of high cost, large steam consumption, large energy consumption, etc. The effect of good quality and low equipment investment

Pending Publication Date: 2018-10-26
秦皇岛农享田生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The first purpose of the present invention is to provide a method for producing compound fertilizers through high-tower granulation with simple process, easy implementation, greatly reduced energy consumption and production cost, no steam and no melting, so as to effectively relieve the existing high-tower granulation The process has problems such as large steam consumption, large energy consumption, and high cost

Method used

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  • Method for producing compound fertilizer through high-tower granulating, system and compound fertilizer
  • Method for producing compound fertilizer through high-tower granulating, system and compound fertilizer
  • Method for producing compound fertilizer through high-tower granulating, system and compound fertilizer

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Embodiment 1

[0103] figure 1 It shows a schematic diagram of the system structure of the high-tower granulation production of compound fertilizer provided by an embodiment of the present invention, as figure 1 Shown, a kind of high-tower granulation system of producing compound fertilizer comprises the urea sulfate reaction tank, NPK slurry mixing tank, emulsifier and high tower connected in sequence;

[0104] A urea feed inlet and a sulfuric acid feed inlet are provided on the urea sulfate reaction tank; a phosphate fertilizer feed inlet and a potassium fertilizer feed inlet are arranged on the NPK slurry mixing tank;

[0105] On the connecting pipeline of the urea sulfuric acid reaction tank and the NPK slurry mixing tank and / or on the NPK slurry mixing tank, an ammonia source inlet is arranged;

[0106] A granulation nozzle is installed in the high tower; the granulation nozzle adopts a rotary centrifugal discharge method to granulate;

[0107] A delivery pump is arranged on the conne...

Embodiment 2

[0110] figure 2 It shows a schematic flow chart of the method for producing compound fertilizer by high tower granulation provided by an embodiment of the present invention; as figure 2 Shown, a kind of high tower granulation produces the method for compound fertilizer, comprises the following steps:

[0111] (a) React sulfuric acid and urea to generate a sulfuric acid urea solution; the molar ratio of sulfuric acid to urea is 1:3.6; the reaction temperature of sulfuric acid and urea is 115°C;

[0112] (b) mixing the urea sulfate solution with synthetic ammonia, monoammonium phosphate and potassium sulfate to form a homogeneous NPK suspension slurry; the mixing temperature is 105° C.; the pH value of the NPK suspension slurry is 5 to 5.5;

[0113] (c) emulsifying the NPK suspension slurry with an emulsifier;

[0114] (d) The emulsified NPK suspension slurry enters the granulation nozzle in the high tower, and the centrifugal force generated by the rotation of the granulati...

Embodiment 3

[0117] A method for producing compound fertilizer by high tower granulation, comprising the following steps:

[0118] (a) React sulfuric acid and urea to generate a sulfuric acid urea solution; the molar ratio of sulfuric acid to urea is 1:3.8; the reaction temperature of sulfuric acid and urea is 117°C;

[0119] (b) mixing urea sulfate solution with synthetic ammonia, monoammonium phosphate and potassium sulfate to form a homogeneous NPK suspension slurry; the mixing temperature is 115° C.; the pH value of the NPK suspension slurry is 5.5 to 6.5;

[0120] (c) emulsifying the NPK suspension slurry with an emulsifier;

[0121] (d) The emulsified NPK suspension slurry enters the granulation nozzle in the high tower, and the centrifugal force generated by the rotation of the granulation nozzle will pass the slurry through small holes of 1 to 4 mm to form small droplets of 1 to 4 mm. The free-falling drops and the updraft in the tower realize natural heat exchange, and solidify i...

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Abstract

The invention belongs to the technical field of compound fertilizers and relates to a method for producing a compound fertilizer through high-tower granulating, a system and the compound fertilizer. The method for producing the compound fertilizer through high-tower granulating, provided by the invention, comprises the following steps: subjecting sulfuric acid and urea to a reaction so as to produce a urea sulfate solution; mixing the urea sulfate solution with an ammonia source, a phosphate fertilizer and a potassium fertilizer so as to form homogeneous-state NPK suspending slurry; spraying the NPK suspending slurry through a granulating sprayer in a high tower, thereby completing granulating in the tower. According to the method, the process is simple, the implementation is easy, the energy consumption and production cost can be greatly reduced, the method is a steam-free melt-free process, and the problems of the existing high-tower granulating processes that the steam consumption is high, the energy consumption is high, the cost is high and the like can be effectively solved.

Description

technical field [0001] The invention belongs to the technical field of compound fertilizers, and in particular relates to a method and system for producing compound fertilizers by high-tower granulation and compound fertilizers. Background technique [0002] In recent years, with the promotion and application of high-tower granulation technology, the production of compound fertilizer has jumped to a new level. The compound fertilizer produced by high-tower granulation technology has the characteristics of uniform nutrient, high fertilizer efficiency, good water solubility, wide application range and superior performance, and has a wider application prospect. [0003] The typical high-tower granulation production process of compound fertilizer mainly includes: (1) Norwegian tower spray granulation process. The tower spray granulation process was developed by NorsKHydro in the late 1960s. It is also the first melt granulation technology proposed in the world. The production ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00B01J2/04
CPCB01J2/04C05G1/00
Inventor 杨金凤王畅
Owner 秦皇岛农享田生物科技有限公司
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