Production process of high-nitrogen sulfur-based compound fertilizer

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...

Examples

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...

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...

Examples

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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