Method for preparing high-nitrogen sulfonyl azophoska compound fertilizer

A technology of nitrogen, phosphorus and potassium compound fertilizer and production method, which is applied in the field of chemical production of phosphorus and compound fertilizers, can solve the problems of low nitrogen content and low urea utilization rate, and achieve the effects of small nitrogen loss, uniform distribution, and reduced drying load

Active Publication Date: 2009-01-07
贵州西洋实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the invention is to overcome the low nitrogen content in the existing sulfur-based NPK compound fertilizer and the low urea utilization rate when using urea to increase the nitrogen content.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0015] Raw material 1: Sulfur-based NPK compound fertilizer slurry

[0016] The composition of sulfur-based NPK compound fertilizer slurry is shown in the table below

[0017] components

N

P 2 o 5

K 2 o

SO 4 2-

other

moisture

total

[0018] content

%

8.4

12.4

8.6

25.0

10.4

35.2

100

[0019] Collection location: Guizhou Xiyang Fertilizer Co., Ltd.

[0020] Raw material 2: urea N content 46%

[0021] Collection location: Guizhou Xiyang Fertilizer Co., Ltd.

Embodiment approach

[0023] Use a slurry pump to transport the sulfur-based nitrogen, phosphorus and potassium compound fertilizer slurry to the top of the tower and drop it in an atomized state through the nozzle, and conduct countercurrent heat exchange with the low-temperature hot air (120°C) that enters the bottom of the tower, and the tail gas is treated by dust collection After emptying. The hot powdered sulfur-based nitrogen, phosphorus and potassium compound fertilizer is metered into the disc-type ball forming machine together with the metered urea powder (powdered sulfur-based nitrogen, phosphorus and potassium compound fertilizer: urea powder = 7:3) to form balls, The machine sprays an appropriate amount of sulfur-based NPK compound fertilizer slurry (powder material: slurry = 2:1) as a binder. After pelleting, the materials are exchanged in parallel with low-temperature hot air (120°C) in the drum dryer. The fertilizer particles are dried and polished in the dryer. The dried materials ...

Embodiment example 2

[0029] Raw material 1: Sulfur-based NPK compound fertilizer slurry

[0030] The composition of sulfur-based NPK compound fertilizer slurry is shown in the table below

[0031] components

[0032] Collection location: Guizhou Xiyang Fertilizer Co., Ltd.

[0033] Raw material 2: urea N content 46%

[0034] Collection location: Guizhou Xiyang Fertilizer Co., Ltd.

[0035] Method of implementation:

[0036] Use a slurry pump to transport the sulfur-based nitrogen, phosphorus and potassium compound fertilizer slurry to the top of the tower and drop it in an atomized state through the nozzle, and conduct countercurrent heat exchange with the low-temperature hot air (120°C) that enters the bottom of the tower, and the tail gas is treated by dust collection After emptying. The hot powdered sulfur-based nitrogen, phosphorus and potassium compound fertilizer is metered into the disc-type ball forming machine together with the metered urea powder (powdered sulfur-based nitr...

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PUM

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Abstract

The invention relates to a method for producing a high-N S-based NPK compound fertilizer from an S-based NPK compound fertilizer slurry and urea. The method comprises the following steps: drying the S-based NPK compound fertilizer slurry at a low temperature in an empty tower; mixing the dried NPK basal fertilizer powder with urea powder obtained by crushing granulated urea; granulating, drying at a low temperature, polishing and sieving to obtain the high-N S-based NPK compound fertilizer. Compared with the prior S-based compound fertilizer production method, the method has the advantages of high N content in the S-based NPK compound fertilizer product, large adjusting range of N content, less N loss in the production process, long time for crops in absorbing N in the fertilizer.

Description

Technical field: [0001] The invention relates to a method for producing high-nitrogen, sulfur-based nitrogen, phosphorus and potassium compound fertilizers by using sulfur-based nitrogen, phosphorus and potassium compound fertilizer slurry and urea, and belongs to the technical field of chemical production of phosphorus compound fertilizers. Background technique: [0002] At present, there are mainly three types of compound fertilizers produced in China: nitro-based compound fertilizers, urea-based compound fertilizers and sulfur-based compound fertilizers. The first two kinds of fertilizers are high-concentration nitrogen, phosphorus and potassium multi-component fertilizers, which are made of ammonium nitrate and urea as the main nitrogen source, and ammonium chloride, potassium chloride, potassium sulfate, heavy calcium, ammonium phosphate and other basic fertilizers are added as raw materials for secondary processing. compound fertilizer. Most of these two compound fert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00C05G5/00
Inventor 张西兴马武权朱云勤庞世花李树军
Owner 贵州西洋实业有限公司
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