Chemosynthetic water-soluble fertilizer and production method and application thereof

Abstract

The invention discloses a production method of a chemosynthetic water-soluble fertilizer, the chemosynthetic water-soluble fertilizer prepared through the production method of the chemosynthetic water-soluble fertilizer and application of the chemosynthetic water-soluble fertilizer. According to the method, production is performed by taking industrial diammonium hydrogen phosphate and / or monopotassium phosphate, nitrogenous fertilizer and potash fertilizer as main raw materials through hydrogen bonding, acid regulating by adding alkaline and the like. The production method is little in investment, few in production procedures, short in production cycle and low in production cost. The chemosynthetic water-soluble fertilizer is appropriate in acidity, capable of achieving the good crystalline state, stable and uniform in composition, not prone to be hardened and damped, capable of being fully dissolved in water, easy to absorb and convert, high in fertilizer utilization rate, significant in synergistic effect and suitable for being applied to acidic or meta-acidic soil and facility greenhouses.

Description

technical field

[0001] The invention relates to the field of water-soluble fertilizers. More specifically, the present invention relates to a chemically synthesized water-soluble fertilizer and its production method and application. Background technique

[0002] At present, the market of mixed fertilizers produced from low-grade raw materials in my country is gradually shrinking, and the market of new fertilizers represented by water-soluble compound fertilizers is expanding rapidly. The manufacturing methods of water-soluble fertilizers with a large number of elements, whether foreign or domestic, include "wet process phosphoric acid" purification technology, nitrophosphate fertilizer production technology and ammonium phosphate dissolution and recrystallization separation technology, etc. There are many prominent problems in the production of soluble phosphate, such as many production processes, long process, large investment, and high energy consumption, which lead to hi...

Examples

Embodiment 1

[0043] Technical indicators: 30-10-10+TE0.3

[0044] Raw materials: 175kg of ammonium dihydrogen phosphate, 575kg of urea, 225kg of potassium nitrate, 10kg of sodium octaborate tetrahydrate, 5.5kg of zinc sulfate heptahydrate, 6kg of potassium hydroxide, and 3.5kg of sodium citrate.

[0045] Such as figure 1 Shown, the production method of the chemically synthesized water-soluble fertilizer of present embodiment, comprises the steps:

[0046] Step 1, adding ammonium dihydrogen phosphate into the dissolving tank, adding an appropriate amount of water to make the water content of ammonium dihydrogen phosphate 35%, and heating it to 90°C, finely filtering to obtain phosphorus fertilizer slurry and the first filter residue;

[0047] Step 2, pump the phosphorus fertilizer slurry into the first reaction kettle, add urea, heat to keep the temperature of the first reaction kettle at 90°C, and react for 2 hours to obtain phosphorus and nitrogen slurry;

[0048] Step 3. Add potassium ...

Embodiment 2

[0056] Technical indicators: 20-10-30+TE0.2

[0057] Raw materials: Potassium dihydrogen phosphate 210kg, urea 260kg, potassium nitrate 510kg, sodium octaborate tetrahydrate 5kg, zinc sulfate heptahydrate 6kg, potassium hydroxide 5kg, sodium citrate 4kg.

[0058] Such as figure 1 Shown, the production method of the chemically synthesized water-soluble fertilizer of present embodiment, comprises the steps:

[0059] Step 1, adding potassium dihydrogen phosphate into the dissolving tank, adding an appropriate amount of water to make the water content of potassium dihydrogen phosphate 25%, heating it to 95°C, and finely filtering to obtain phosphorus fertilizer slurry and the first filter residue;

[0060] Step 2, pump the phosphorus fertilizer slurry into the first reactor, add urea, heat to keep the temperature of the first reactor at 95°C, and react for 1.5 hours to obtain the phosphorus and nitrogen slurry;

[0061] Step 3. Add potassium nitrate, sodium octaborate tetrahydra...

Embodiment 3

[0069] Technical indicators: 10-45-15+TE0.25

[0070] Raw materials: 580kg ammonium dihydrogen phosphate, 200kg potassium dihydrogen phosphate, 140kg potassium nitrate, 50kg urea, 10kg sodium octaborate tetrahydrate, 4kg zinc sulfate heptahydrate, 12kg potassium hydroxide, 4kg sodium citrate.

[0071] Such as figure 1 Shown, the production method of the chemically synthesized water-soluble fertilizer of present embodiment, comprises the steps:

[0072] Step 1. Add ammonium dihydrogen phosphate and potassium dihydrogen phosphate into the dissolving tank, add an appropriate amount of water to make the water content of ammonium dihydrogen phosphate and potassium dihydrogen phosphate 20%, heat it to 100°C, fine filter, Obtain phosphorus fertilizer slurry and the first filter residue;

[0073] Step 2, pumping the phosphorus fertilizer slurry into the first reactor, adding urea, heating to keep the temperature of the first reactor at 100°C, and reacting for 1 hour to obtain the ph...

technical field

[0001] The invention relates to the field of water-soluble fertilizers. More specifically, the present invention relates to a chemically synthesized water-soluble fertilizer and its production method and application. Background technique

[0002] At present, the market of mixed fertilizers produced from low-grade raw materials in my country is gradually shrinking, and the market of new fertilizers represented by water-soluble compound fertilizers is expanding rapidly. The manufacturing methods of water-soluble fertilizers with a large number of elements, whether foreign or domestic, include "wet process phosphoric acid" purification technology, nitrophosphate fertilizer production technology and ammonium phosphate dissolution and recrystallization separation technology, etc. There are many prominent problems in the production of soluble phosphate, such as many production processes, long process, large investment, and high energy consumption, which lead to hi...

Examples

Embodiment 1

[0043] Technical indicators: 30-10-10+TE0.3

[0044] Raw materials: 175kg of ammonium dihydrogen phosphate, 575kg of urea, 225kg of potassium nitrate, 10kg of sodium octaborate tetrahydrate, 5.5kg of zinc sulfate heptahydrate, 6kg of potassium hydroxide, and 3.5kg of sodium citrate.

[0045] Such as figure 1 Shown, the production method of the chemically synthesized water-soluble fertilizer of present embodiment, comprises the steps:

[0046] Step 1, adding ammonium dihydrogen phosphate into the dissolving tank, adding an appropriate amount of water to make the water content of ammonium dihydrogen phosphate 35%, and heating it to 90°C, finely filtering to obtain phosphorus fertilizer slurry and the first filter residue;

[0047] Step 2, pump the phosphorus fertilizer slurry into the first reaction kettle, add urea, heat to keep the temperature of the first reaction kettle at 90°C, and react for 2 hours to obtain phosphorus and nitrogen slurry;

[0048] Step 3. Add potassium ...

Embodiment 2

[0056] Technical indicators: 20-10-30+TE0.2

[0057] Raw materials: Potassium dihydrogen phosphate 210kg, urea 260kg, potassium nitrate 510kg, sodium octaborate tetrahydrate 5kg, zinc sulfate heptahydrate 6kg, potassium hydroxide 5kg, sodium citrate 4kg.

[0058] Such as figure 1 Shown, the production method of the chemically synthesized water-soluble fertilizer of present embodiment, comprises the steps:

[0059] Step 1, adding potassium dihydrogen phosphate into the dissolving tank, adding an appropriate amount of water to make the water content of potassium dihydrogen phosphate 25%, heating it to 95°C, and finely filtering to obtain phosphorus fertilizer slurry and the first filter residue;

[0060] Step 2, pump the phosphorus fertilizer slurry into the first reactor, add urea, heat to keep the temperature of the first reactor at 95°C, and react for 1.5 hours to obtain the phosphorus and nitrogen slurry;

[0061] Step 3. Add potassium nitrate, sodium octaborate tetrahydra...

Embodiment 3

[0069] Technical indicators: 10-45-15+TE0.25

[0070] Raw materials: 580kg ammonium dihydrogen phosphate, 200kg potassium dihydrogen phosphate, 140kg potassium nitrate, 50kg urea, 10kg sodium octaborate tetrahydrate, 4kg zinc sulfate heptahydrate, 12kg potassium hydroxide, 4kg sodium citrate.

[0071] Such as figure 1 Shown, the production method of the chemically synthesized water-soluble fertilizer of present embodiment, comprises the steps:

[0072] Step 1. Add ammonium dihydrogen phosphate and potassium dihydrogen phosphate into the dissolving tank, add an appropriate amount of water to make the water content of ammonium dihydrogen phosphate and potassium dihydrogen phosphate 20%, heat it to 100°C, fine filter, Obtain phosphorus fertilizer slurry and the first filter residue;

[0073] Step 2, pumping the phosphorus fertilizer slurry into the first reactor, adding urea, heating to keep the temperature of the first reactor at 100°C, and reacting for 1 hour to obtain the ph...

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