Production technique and device of high-water-soluble-phosphorus sulfur-base compound fertilizer

A production process and water-soluble technology, which is applied to the production process and device field of highly water-soluble phosphorus-sulfur-based compound fertilizers, can solve the problems of low water-soluble phosphorus content of sulfur-based compound fertilizers and cannot meet customer needs, etc., to increase the quality The effect of advantages, increasing popularity, and strong competitiveness

Active Publication Date: 2015-04-29
HUBEI SANNING CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing spray granulation method uses 20%~25% dilute phosphoric acid produced by low-grade high-magnesium phosphate rock to produce sulfur-based compound fertilizers with a low water-soluble phosphorus content, generally between 80% and 84%. satisfy customer needs

Method used

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  • Production technique and device of high-water-soluble-phosphorus sulfur-base compound fertilizer

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Effect test

Embodiment 1

[0024] A kind of production technology of highly water-soluble phosphorus-sulfur-based compound fertilizer, concrete steps are:

[0025] 1) In parts by weight, mix dilute phosphoric acid with a mass concentration of 20%~25% and the mother liquor in an industrial monoammonium phosphate plant at a ratio of 2:1, then add 0.8 parts of concentrated sulfuric acid with a mass concentration of 98%, 0.5 parts Potassium chloride was reacted for 4 hours;

[0026] 2) Neutralize the solution obtained in step 1) with ammonia gas when passing through the tubular reactor, adjust the amount of ammonia in time according to the degree of neutralization and the viscosity of the slurry until the neutralization degree of the slurry is 1.10, and then proceed to manufacture granules to obtain a sulfur-based compound fertilizer with a water-soluble phosphorus content of 89.6%.

Embodiment 2

[0028] A kind of production technology of highly water-soluble phosphorus-sulfur-based compound fertilizer, concrete steps are:

[0029] 1) In parts by weight, mix dilute phosphoric acid with a mass concentration of 20%~25% and the mother liquor in an industrial monoammonium phosphate plant at a ratio of 4:1, then add 1 part of concentrated sulfuric acid with a mass concentration of 98%, 1.5 parts Potassium chloride was reacted for 6 hours;

[0030] 2) Neutralize the solution obtained in step 1) with ammonia gas when passing through the tubular reactor, adjust the amount of ammonia in time according to the degree of neutralization and the viscosity of the slurry until the neutralization degree of the slurry is 1.50; then granulate , to obtain a phosphorus-sulfur-based compound fertilizer with a water-soluble phosphorus content of 92.3%.

[0031] The composition of the mother liquor in the said industrial monoammonium phosphate unit has a nitrogen content of 4-6%, water-solubl...

Embodiment 3

[0034] A kind of production technology of highly water-soluble phosphorus-sulfur-based compound fertilizer, concrete steps are:

[0035] 1) In parts by weight, mix dilute phosphoric acid with a mass concentration of 20%~25% and the mother liquor in an industrial monoammonium phosphate plant at a ratio of 3:1, then add 0.88 parts of concentrated sulfuric acid with a mass concentration of 98%, 1.0 parts Potassium chloride was reacted for 5 hours;

[0036] 2) Neutralize the solution obtained in step 1) with ammonia gas when passing through the tubular reactor, adjust the amount of ammonia in time according to the degree of neutralization and the viscosity of the slurry until the neutralization degree of the slurry is 1.50; then granulate , to obtain a phosphorus-sulfur-based compound fertilizer with a water-soluble phosphorus content of 93.5%.

[0037] In the above examples, the components of the mother liquor in the industrial monoammonium phosphate plant have a nitrogen conten...

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Abstract

The invention discloses a production technique of a high-water-soluble-phosphorus sulfur-base compound fertilizer, which comprises the following steps: mixing 20-25 wt% dilute phosphoric acid with a mother solution in an industrial monoammonium phosphate device according to the mass ratio of (2-4):1, and adding 0.88 part of 98 wt% concentrated sulfuric acid and 1.0 part of potassium chloride to react for 4-6 hours; and neutralizing and granulating to obtain the sulfur-base compound fertilizer in which the water-soluble phosphorus content can reach 88% above. The invention also discloses a device for producing the high-water-soluble-phosphorus sulfur-base compound fertilizer by using the technique. The high-water-soluble-phosphorus sulfur-base compound fertilizer has the advantages of smooth appearance and uniform granules. The sulfur-base compound fertilizer device is easy to operate and steady in production control in the granulation process, and can maximally display the productivity.

Description

technical field [0001] The invention belongs to the field of chemical production, and in particular relates to a production process and device of highly water-soluble phosphorus-sulfur-based compound fertilizer. Background technique [0002] In recent years, with a large number of sulfur-based compound fertilizer plants put into operation, sulfur-based compound fertilizer products have become saturated, and the market competition is fierce. Coupled with the continuous price increase of raw materials, customers have put forward higher requirements for water-soluble phosphorus, and the profits of enterprises have been further compressed. Therefore, it is of great practical significance to ensure the product quality of the compound fertilizer plant. [0003] The existing spray granulation method uses 20%~25% dilute phosphoric acid produced by low-grade high-magnesium phosphate rock to produce sulfur-based compound fertilizers with a low water-soluble phosphorus content, genera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/06
CPCC05G1/00
Inventor 李万清王光明李宜平吴建华杨亭逸潘小明窦德军陈洲马玉丰刘晏
Owner HUBEI SANNING CHEM
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