Production process of high-nitrogen sulfur-based compound fertilizer

A production process, the technology of nitrogen, phosphorus and potassium compound fertilizer, which is applied in the field of production process of high nitrogen and sulfur-based compound fertilizer, can solve the problem of inability to achieve simultaneous and uniform release of nitrogen, phosphorus and potassium, unreasonable fertilizer use angle, and nitrogen utilization by crops. Low-level problems, to achieve the effect of promoting photosynthesis, improving yield and quality, and anti-caking performance

Inactive Publication Date: 2018-08-28
GUIYANG KAILIN FERTILIZER CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can greatly increase the nitrogen content in the product (it can be increased by 5-10 percentage points), this method is not reasonable from the perspective of fertilizer use
Because urea dissolves quickly in water, the crops are lost by the rain before they can be fully absorbed, the utilization rate of the crops is low, and the demand for nitrogen in the early stage of crop growth is not high
However, the release rate of phosphorus and potassium in the soil is slower than that of nitrogen. Using large granule urea to increase the nitrogen content in nitrogen, phosphorus and potassium compound fertilizers cannot achieve simultaneous and uniform release of nitrogen, phosphorus and potassium, and the utilization rate of nitrogen by crops is low.

Method used

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  • Production process of high-nitrogen sulfur-based compound fertilizer
  • Production process of high-nitrogen sulfur-based compound fertilizer

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Effect test

Embodiment 1

[0020] A production technology of high nitrogen-sulfur-based compound fertilizer, the implementation method is as follows:

[0021] The nitrogen-phosphorus-potassium compound fertilizer slurry is transported to the top of the high tower by a slurry pump, and falls down in an atomized state through the nozzle, and conducts countercurrent heat exchange with the 120 ℃ low-temperature hot air introduced at the bottom of the high tower, and the exhaust gas is emptied after dust collection. The hot powder NPK compound fertilizer is metered into the disc pelletizer and mixed with the metered sulfur sol to obtain the compound base material. After the temperature drops to 5°C, the ammonium bicarbonate powder is added. In the dryer, the co-current heat exchange is carried out with the low-temperature air. The fertilizer particles are dried and polished at a low temperature of 20°C in the dryer. The dried materials are sieved and packaged into products, and the sieved fine powder is retur...

Embodiment 2

[0023] A production technology of high nitrogen-sulfur-based compound fertilizer, the implementation method is as follows:

[0024] The nitrogen-phosphorus-potassium compound fertilizer slurry is transported to the top of the high tower by a slurry pump, and falls down in an atomized state through the nozzle, and conducts countercurrent heat exchange with the 120 ℃ low-temperature hot air introduced at the bottom of the high tower, and the exhaust gas is emptied after dust collection. The hot powder NPK compound fertilizer is metered into the disc pelletizer and mixed with the metered sulfur sol to obtain the compound base material. After the temperature drops to 8°C, the ammonium bicarbonate powder is added. In the dryer, the co-current heat exchange is carried out with the low-temperature air. The fertilizer particles are dried and polished at a low temperature of 25°C in the dryer. The dried materials are screened and packaged into products, and the screened fine powder is r...

Embodiment 3

[0026] A production technology of high nitrogen-sulfur-based compound fertilizer, the implementation method is as follows:

[0027] The nitrogen-phosphorus-potassium compound fertilizer slurry is transported to the top of the high tower by a slurry pump, and falls down in an atomized state through the nozzle, and conducts countercurrent heat exchange with the 120 ℃ low-temperature hot air introduced at the bottom of the high tower, and the exhaust gas is emptied after dust collection. The hot powder NPK compound fertilizer is metered into the disc pelletizer and mixed with the metered sulfur sol to obtain the compound base material. After the temperature drops to 10°C, ammonium bicarbonate powder is added. In the dryer, the co-current heat exchange is carried out with the low-temperature air. The fertilizer particles are dried and polished at a low temperature of 30°C in the dryer. The dried materials are sieved and packaged into products, and the sieved fine powder is returned...

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Abstract

The invention relates to the technical field of fertilizers and particularly relates to a production process of a high-nitrogen sulfur-based compound fertilizer. The production process of the high-nitrogen sulfur-based compound fertilizer comprises the following steps: mixing nitrogen-phosphorus-potassium compound fertilizer material pulp with sulfur sol to obtain a compound base material, then mixing the base material with ammonium hydrogen carbonate powder, granulating, drying at low temperature, polishing and screening to produce the high-nitrogen sulfur-based compound fertilizer. The fertilizer is capable of supplying abundant nitrogen, phosphorus and potassium elements to crops, is applicable to acid soil or alkaline soil, and is capable of increasing the concentration of carbon dioxide around the crops, effectively accelerating photosynthesis of the crops and improving the yield and the quality of the crops.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a production process of a high-nitrogen-sulfur-based compound fertilizer. Background technique [0002] At present, there are mainly three kinds of compound fertilizers produced in China: nitro compound fertilizer, urine-based compound fertilizer and sulfur-based compound fertilizer. The first two fertilizers use ammonium nitrate and urea as the main nitrogen sources, and add basic fertilizers such as ammonium chloride, potassium chloride, potassium sulfate, heavy calcium, and ammonium phosphate as raw materials for secondary processing. Compound fertilizer. Most of these two kinds of compound fertilizers use potassium chloride as the potassium source, and the chloride ion content in the products is high, and there are certain restrictions on the use of these two kinds of fertilizers for some chlorine-avoiding crops. Sulfur-based compound fertilizer is a low-chlorine compou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00
CPCC05B7/00C05G5/12C05C3/00C05D1/02C05D7/00C05D9/02
Inventor 吴有丽项双龙廖吉星何润林徐立钦罗付浪唐丽君韩朝应何花王采艳
Owner GUIYANG KAILIN FERTILIZER CO LTD
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