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Macroelement water soluble fertilizer and preparation method therefor

A large amount of elements, water-soluble fertilizer technology, applied in the direction of fertilization equipment, fertilizer mixture, application, etc., can solve the problems of poor chemical safety and stability, many impurities or sediment, single nutrient, etc., to achieve uniform appearance, no environmental pollution, The effect of simplifying the process flow

Active Publication Date: 2015-12-02
GUIGANG BATIAN ECOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention aims at the problems of single nutrient, easy compaction, poor solubility, many impurities or sediments, poor chemical safety and stability, etc. in the current water-soluble fertilizers.

Method used

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  • Macroelement water soluble fertilizer and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] ①Add 42.5kg of agricultural ammonium phosphate and 13.5kg of agricultural potassium chloride to 80L of water, then add liquid ammonia to adjust the pH value to 7.0, and form a saturated solution with some filter residues coexisting at 20°C, and filter at 20°C to obtain Filtrate 1 and 9.7kg filter residue 1;

[0057] 2. Add 18.7kg agricultural potassium chloride to filtrate 1 and heat to 80°C, then add 4mol / L phosphoric acid to adjust pH=3, stir the crystals separated out at this time and filter while hot at 50°C to obtain semi-finished water-soluble fertilizer crystals ( Weight 45kg, N%=4.22%, P 2 o 5 %=51.71%, K20%=32.34%, Cl%=1.26%) and filtrate 2,

[0058] ③ Add 36.2kg of agricultural ammonium phosphate to filtrate 2, then add liquid ammonia at 20°C to adjust the pH to 7.0, return 7.2kg of filter residue to the residue conversion system, cool and crystallize the filtrate, and filter at 20°C. This filtrate is called filtrate 3. Dry at 80°C to obtain chlorine-based ...

Embodiment 2

[0062] ①Add 40.3kg of agricultural ammonium phosphate and 14.2kg of agricultural potassium chloride to 80L of water, then add potassium hydroxide to adjust the pH value to 6.0, and form a saturated solution with some filter residues at 20°C, and filter at 20°C, Obtain filtrate 1 and 8.1kg filter residue 1;

[0063] 2. Add 19.6kg agricultural potassium chloride to filtrate 1 and heat to 80°C, then add 4mol / L phosphoric acid to adjust pH=4, stir the precipitated crystals and filter while hot at 50°C to obtain semi-finished water-soluble fertilizer crystals ( Weight 43.5kg, N%=3.82%, P 2 o 5 %=43.98%, K20%=40.23%, Cl%=2.74%) and filtrate 2,

[0064] ③Add 34.3kg of agricultural ammonium phosphate to filtrate 2, add potassium hydroxide at 20°C to adjust the pH value to 6.0, return 6.8kg of filter residue to the residue conversion system, cool and crystallize the filtrate, and filter at 20°C, this filtrate is called filtrate 3 . Dry at 80°C to obtain chlorine-based fertilizer, w...

Embodiment 3

[0068] ① Add 42.5 kg of agricultural ammonium phosphate and 9.8 kg of agricultural potassium chloride to 80 L of water, then add liquid ammonia to adjust the pH value to 7.0, and form a saturated solution with some filter residues coexisting at 20 ° C, and filter at 20 ° C to obtain Filtrate 1 and 9.5kg filter residue 1;

[0069] 2. Add 16.2kg of agricultural potassium chloride to filtrate 1 and heat to 80°C, then add 4mol / L phosphoric acid to adjust pH=5, stir the precipitated crystals and filter while hot at 50°C to obtain the water-soluble fertilizer semi-finished crystals ( Weight 41.1kg, N%=4.25%, P 2 o 5 %=50.6%, K20%=24.48%, Cl%=0.39%) and filtrate 2,

[0070] ③Add 37.3kg of agricultural ammonium phosphate to filtrate 2, then add liquid ammonia at 20°C to adjust the pH=7.0, return 7.5kg of filter residue to the residue conversion system, cool and crystallize the filtrate, and filter at 20°C, this filtrate is called filtrate 3. Dry at 80°C to obtain chlorine-based fer...

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Abstract

The invention discloses a macroelement water soluble fertilizer and a preparation method therefor. Raw materials of the fertilizer comprise the following components in percentage by weight: ammonium phosphate, potassium chloride, a small molecular organic acid, a nitrogen source, a medium trace element nutrient chelate (complex), a speader and a penetrant. The preparation method comprises: by taking ammonium phosphate, potassium chloride and nitrogen source as the main raw materials, carrying out a liquid phase reaction in an aqueous solution; preparing a target product by virtue of multi-stage crystallization and filtration; then adding the spreader and the pentrant; adding the nutrient chelated medium trace elements; and converting water insoluble phosphorus by using the small molecular organic acid, wherein the phosphorus utilization ratio is improved, and the converted residues are directly used as fertilizer auxiliary materials so as to recycle resources. Moreover, the macroelement water soluble fertilizer disclosed by the invention is simple and safe in process, is fully soluble in water, is not hardened, is fast in dissolving speed, is uniform in appearance and is a chlorine-free product, and the content of water insoluble substances is less than or equal to 0.5%. The macroelement water soluble fertilizer is low in cost, is quickly absorbed by crops to improve the crop quality, and is nutritional and safe and free of environmental pollution.

Description

technical field [0001] The invention belongs to the technical field of compound fertilizer production and relates to a production method of a large amount of water-soluble fertilizer. Background technique [0002] The production process of water-soluble fertilizer has two kinds of physical mixing and chemical synthesis; one is physical mixing, that is, raw material fertilizers such as urea, ammonium sulfate, monoammonium phosphate, and potassium chloride are passed through mechanical equipment such as pulverizers and mixers, according to The corresponding formulations are mixed directly. This kind of water-soluble fertilizer has simple process, low production cost, and cheap price in the market; physically mixed water-soluble fertilizer products have many impurities, uneven particle size, color, etc., poor solubility, and are easy to absorb moisture and agglomerate. very low. The second is chemical synthesis, that is, raw materials are subjected to a series of specific che...

Claims

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Application Information

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IPC IPC(8): C05G3/00
Inventor 刘毅韩冬芳马骥
Owner GUIGANG BATIAN ECOLOGY
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