CN102898221B - Preparation method of nitrogen-phosphorus-potassium compound fertilizer - Google Patents
Preparation method of nitrogen-phosphorus-potassium compound fertilizer Download PDFInfo
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- CN102898221B CN102898221B CN201210457274.4A CN201210457274A CN102898221B CN 102898221 B CN102898221 B CN 102898221B CN 201210457274 A CN201210457274 A CN 201210457274A CN 102898221 B CN102898221 B CN 102898221B
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Abstract
The invention discloses a preparation method of a nitrogen-phosphorus-potassium compound fertilizer. The method comprises the steps of: enabling excessive sulfuric acid to react with potassium chloride in a reaction tank in the condition of warming up to generate potassium bisulfate slurry containing excessive sulfuric acid, mixing the potassium bisulfate slurry containing excessive sulfuric acid with a monoammonium phosphate solution, adding the potassium bisulfate slurry and the monoammonium phosphate solution as well as synthesis ammonia into a reactor together, so as to generate compound fertilizer slurry containing nitrogen-phosphorus-potassium in the condition of warming up, adding the mixed solution of the material containing nitrogen-phosphorus-potassium after reaction and nitric acid as well as water into a granulator, simultaneously adding the synthesis ammonia so as to generate compound fertilizer particles containing the nitrogen-phosphorus-potassium in the condition of warming up, drying, cooling and screening the compound fertilizer particles. The preparation method has the advantages that the potassium chloride is subjected to dechlorination with the excessive sulfuric acid, and biuret is not produced in the low-temperature combination reaction. The fertilizer contains nitrate nitrogen and ammonium nitrogen, and is quick in effect in the early stage and stable in release in the later stage.
Description
Technical field
The invention belongs to the manufacture method of chemical fertilizer, is specifically a kind of preparation method of nitrogen-phosphorus-potassium compound fertilizer.
Background technology
The method of manufacturing technology of current nitrogen-phosphorus-potassium compound fertilizer is higher due to the temperature of chemical reaction, and easily produces biuret, can cause damage to soil.Therefore, the biuret how reduced in production process produces the root problem just becoming the solution of nitrogen-phosphorus-potassium compound fertilizer manufacture needs.For this reason, the present inventor has done and has studied in earnest, proposes goal of the invention of the present invention.
Summary of the invention
Goal of the invention of the present invention puts forward to overcome the deficiency producing biuret in current nitrogen-phosphorus-potassium compound fertilizer manufacture.Namely a kind of preparation method of nitrogen-phosphorus-potassium compound fertilizer is provided.
Technical solution of the present invention realizes like this, the preparation method of this nitrogen-phosphorus-potassium compound fertilizer, it is characterized in that the method comprises the following steps: excess sulfuric acid and Repone K are reacted under Elevated Temperature Conditions in reactive tank, generate the sal enixum slip containing excess sulfuric acid, sal enixum slip containing excess sulfuric acid is mixed with monoammonium phosphate liquid, sal enixum slip and monoammonium phosphate solution and synthetic ammonia are joined in reactor jointly, the composite fertilizer's slip containing N P and K is generated under the condition heated up, join in tablets press by reacted containing the material of N P and K and the mixing solutions of nitric acid and water, add synthetic ammonia simultaneously, the compound fertilizer granules containing N P and K is formed under the condition heated up, by compound fertilizer granules through super-dry, cooling, screening.
Useful technique effect of the present invention is: the excessive sulfuric acid dechlorination of Repone K, low temperature combination reaction does not produce biuret.Containing nitric nitrogen in fertilizer, early stage is quick-acting, and later stage release is stable.
Embodiment
Provide specific embodiment below, structure of the present invention and use are described in detail.
Embodiment 1, excess sulfuric acid and Repone K are reacted under Elevated Temperature Conditions in reactive tank, generate the sal enixum slip containing excess sulfuric acid, the Elevated Temperature Conditions that sulfuric acid and Repone K react is: in 80 ~ 130 DEG C of temperature ranges.Sulfuric acid uses the vitriol oil, the preferably sulfuric acid of concentration more than 90%.Mixed with 80 kg of phosphoric acid one ammonium liquid by sal enixum slip 200 kilograms containing excess sulfuric acid, the specific gravity control of monoammonium phosphate solution is: 1.10 ~ 1.40.Sal enixum slip and monoammonium phosphate solution and 80 kilograms of synthetic ammonia are jointly joined in reactor, reactor preferably uses cross tubular reactor.Under the condition heated up, generate the composite fertilizer's slip containing N P and K, join in tablets press by the mixing solutions of the material containing N P and K and nitric acid and water, the specific gravity control of aqueous nitric acid is: 1.10 ~ 1.55.Add synthetic ammonia, through the granulation time of 1 ~ 5 minute under the condition heated up simultaneously.Formed containing the compound fertilizer granules of N P and K, compound fertilizer granules through super-dry, be cooled to when material particles surface temperature reaches 50 ~ 60 DEG C of temperature and sieve.
Embodiment 2,
Excess sulfuric acid and Repone K are reacted under Elevated Temperature Conditions in reactive tank, generate the sal enixum slip containing excess sulfuric acid, the Elevated Temperature Conditions that sulfuric acid and Repone K react is: in 80 ~ 130 DEG C of temperature ranges.Sulfuric acid uses the vitriol oil, the preferably sulfuric acid of concentration more than 90%.Mixed with 100 kg of phosphoric acid one ammonium liquid by sal enixum slip 240 kilograms containing excess sulfuric acid, the specific gravity control of monoammonium phosphate solution is: 1.10 ~ 1.40.Sal enixum slip and monoammonium phosphate solution and 100 kilograms of synthetic ammonia are jointly joined in reactor, reactor preferably uses cross tubular reactor.Under the condition heated up, generate the composite fertilizer's slip containing N P and K, join in tablets press by the mixing solutions of the material containing N P and K and nitric acid and water, the specific gravity control of aqueous nitric acid is: 1.10 ~ 1.55.Add synthetic ammonia, through the granulation time of 2 ~ 15 minutes under the condition heated up simultaneously.Formed containing the compound fertilizer granules of N P and K, compound fertilizer granules through super-dry, be cooled to when material particles surface temperature reaches 50 ~ 60 DEG C of temperature and sieve.
Excess sulfuric acid and Repone K are reacted under Elevated Temperature Conditions in reactive tank, generate the sal enixum slip containing excess sulfuric acid, the Elevated Temperature Conditions that sulfuric acid and Repone K react is: in 80 ~ 130 DEG C of temperature ranges.Sulfuric acid uses the vitriol oil, the preferably sulfuric acid of concentration more than 90%.Mixed with 120 kg monoammonium phosphate liquid by sal enixum slip 300 kilograms containing excess sulfuric acid, the specific gravity control of monoammonium phosphate solution is: 1.10 ~ 1.40.Sal enixum slip and monoammonium phosphate solution and 120 kg synthetic ammonia are jointly joined in reactor, reactor preferably uses cross tubular reactor.Under the condition heated up, generate the composite fertilizer's slip containing N P and K, join in tablets press by the mixing solutions of the material containing N P and K and nitric acid and water, the specific gravity control of aqueous nitric acid is: 1.10 ~ 1.55.Add synthetic ammonia, through the granulation time of 5 ~ 30 minutes under the condition heated up simultaneously.Formed containing the compound fertilizer granules of N P and K, compound fertilizer granules through super-dry, be cooled to when material particles surface temperature reaches 50 ~ 60 DEG C of temperature and sieve.
Claims (1)
1. a preparation method for nitrogen-phosphorus-potassium compound fertilizer, is characterized in that, the method comprises the following steps:
1) excess sulfuric acid and Repone K are reacted under Elevated Temperature Conditions in reactive tank, generate the sal enixum slip containing excess sulfuric acid, the Elevated Temperature Conditions that sulfuric acid and Repone K react is: 80 DEG C ~ 130 DEG C, and sulfuric acid uses the vitriol oil more than 90%;
2) mixed by the sal enixum slip monoammonium phosphate liquid containing excess sulfuric acid, the proportion of monoammonium phosphate solution is: 1.10 ~ 1.40;
3) sal enixum slip and monoammonium phosphate solution and synthetic ammonia are jointly joined in reactor, reactor uses cross tubular reactor, generates the composite fertilizer's slip containing N P and K under the condition heated up; The mass mixing ratio of the sal enixum containing excess sulfuric acid, monoammonium phosphate, synthetic ammonia is 2.4 ~ 2.5: 1: 1;
4) what step 3) obtained joins in tablets press containing the material of N P and K and the mixing solutions of nitric acid and water, the specific gravity control of aqueous nitric acid is: 1.10 ~ 1.55, add synthetic ammonia, granulation under the condition heated up simultaneously, form the compound fertilizer granules containing N P and K;
Temperature under granulation Elevated Temperature Conditions is the surface temperature of material, and temperature range is 60 DEG C ~ 90 DEG C; Granulation time is 1 ~ 30 minute;
5) compound fertilizer granules through super-dry, be cooled to when material particles surface temperature reaches 50 DEG C ~ 60 DEG C of temperature and sieve.
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| CN102898221B true CN102898221B (en) | 2015-05-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111423270A (en) * | 2020-03-25 | 2020-07-17 | 贵州省草业研究所 | Base fertilizer for pasture planting and preparation method thereof |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105315037A (en) * | 2014-08-05 | 2016-02-10 | 中化山东肥业有限公司 | Process for producing high potassium nitro fertilizer by gunite method |
| CN104725138A (en) * | 2015-03-23 | 2015-06-24 | 戴威农业科技发展股份有限公司 | Carbon matrix compound fertilizer and preparation method thereof |
| CN104761343A (en) * | 2015-03-23 | 2015-07-08 | 戴威农业科技发展股份有限公司 | Carbon-based composite fertilizer and preparation method thereof |
| CN105036847B (en) * | 2015-07-07 | 2018-04-27 | 台湾肥料股份有限公司 | Nitro-compound fertilizer and preparation method thereof |
| CN109608247A (en) * | 2019-01-22 | 2019-04-12 | 盘锦冠桥复合肥科技服务有限公司 | A kind of production method of novel ammonification S-based compound fertilizer |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101328090A (en) * | 2008-04-18 | 2008-12-24 | 中国-阿拉伯化肥有限公司 | Method for producing nitro-sulfur-based nitrogen and potassium compound fertilizer |
| CN102010267A (en) * | 2010-10-19 | 2011-04-13 | 戴威肥业（山东）有限公司 | Preparation method of nitrocompound fertilizer |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101328090A (en) * | 2008-04-18 | 2008-12-24 | 中国-阿拉伯化肥有限公司 | Method for producing nitro-sulfur-based nitrogen and potassium compound fertilizer |
| CN102010267A (en) * | 2010-10-19 | 2011-04-13 | 戴威肥业（山东）有限公司 | Preparation method of nitrocompound fertilizer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111423270A (en) * | 2020-03-25 | 2020-07-17 | 贵州省草业研究所 | Base fertilizer for pasture planting and preparation method thereof |
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Effective date of registration: 20160223 Address after: 262700 Lingang Industrial Park, Shouguang City, Shandong, Weifang Patentee after: DAIWEI ECOLOGICAL ENGINEERING DEVELOPMENT Co.,Ltd. Address before: 262700 Shouguang Road, Shouguang, Shandong Province, No. 1377 Patentee before: DAIWEI AGRICULTURAL SCIENCE & TECHNOLOGY DEVELOPMENT LLC |
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