CN106220278B - It is a kind of improve potassium sulfate compound fertilizer granule strength additive and high-strength complex Hefei particle preparation method - Google Patents
It is a kind of improve potassium sulfate compound fertilizer granule strength additive and high-strength complex Hefei particle preparation method Download PDFInfo
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- CN106220278B CN106220278B CN201610599377.2A CN201610599377A CN106220278B CN 106220278 B CN106220278 B CN 106220278B CN 201610599377 A CN201610599377 A CN 201610599377A CN 106220278 B CN106220278 B CN 106220278B
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B17/00—Other phosphatic fertilisers, e.g. soft rock phosphates, bone meal
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
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Abstract
The invention discloses the preparation methods of a kind of additive for improving potassium sulfate compound fertilizer granule strength and high-strength complex Hefei particle, and wherein the raw material of additive is made of phosphoric acid,diluted, potassium sulfate solid, sulfuric acid；A kind of preparation method of high-strength complex Hefei particle, after phosphoric acid,diluted and potassium sulfate solid are stirred, then with sulfuric acid and steam reaction, generate potassium acid sulfate, potassium sulfate and phosphoric acid melting slurry；Melt slurry is sent to pelletizer mouth and is atomized, and carries out spraying granulation through ammonia ammonification, while to fertilizer；Compound fertilizer's material after spraying is granulated continues bonded pelleting in pelletizer；Compound fertilizer's fertilizer after bonded pelleting obtains complex fertilizer product after drying, screening, cooling and packaging.The preparation method of a kind of additive for improving potassium sulfate compound fertilizer granule strength of the present invention and high-strength complex Hefei particle, the additive apply in compound fertilizer granulating, can effectively enhance the intensity of compound fertilizer granules, substantially reduce the probability of dusting and agglomeration.
Description
Technical field
The invention belongs to technical field of compound fertilizer production, specifically, it is compound to be related to a kind of raising potassium sulfate type
The additive of fertile granule strength and the preparation method of high-strength complex Hefei particle.
Background technique
Traditional compound fertilizer production technology is mainly the granulation of steam granule and drum dried, this traditional production technology master
Want raw material for urea, sulphur ammonium, ammonium chloride, monoammonium phosphate (powdery), coarse whiting, general calcium, calcium magnesium phosphate, potassium sulfate, potassium chloride etc., this
A little raw materials are often divided into grittiness material (such as potassium chloride, potassium sulfate) and viscous material (such as urea, monoammonium phosphate, general calcium, calcium again
Magnesium-phosphorus fertilizer, coarse whiting etc.) two kinds；In NPK process, grittiness powder material in rotary drum granulator in certain temperature and pH
Under the conditions of value etc., amount of liquid phase (such as suitable melting charge slurry, propylhomoserin reaction slurry, surface of material wetting) is controlled, as far as possible
Make various granulation materials that there is optimal solubility, grittiness powder material is bonded by constantly group by liquid phase viscous material recrystallization
Poly- granulating of growing up；Generating collision and friction meanwhile by the continuous rolling of rotary drum granulator, between particle makes particle rounding, obtains
Smooth, the mellow and full particle in surface；The NPK product of high-quality is obtained by dry, screening, cooling, surface treatment etc. again.But it uses
When the potassium sulfate compound fertilizer of granulating method production, potassium (K is showed2O) content increases, the ratio of the total material of grittiness material Zhan increases
When adding, and being humidified, heated in granulation process, the solubility of potassium sulfate is low, and bad adhesion makes particle tight when granulation
Close difference, particle intensity is low, storage and transportational process in easily dusting or agglomeration, therefore become chemical fertilizer production enterprise there is an urgent need to
It solves the problems, such as.
To improve compound fertilizer granules intensity, most domestic producer is added anti-powdering agent (bonding agent) when being granulated, or
It is changed to compound fertilizer production with tower granulation.If 104058902 A of patent CN discloses a kind of " anti-powdering agent of compound fertilizer and application thereof ",
Water soluble polymer resin is added when compound fertilizer granulating and has effects that the inorganic salts of water imbibition, has and improves the anti-dusting of compound fertilizer
Ability, enhancing fertilizer granule strength, but will increase the cost of material of compound fertilizer.
Summary of the invention
In order to solve the above technical problems, the purpose of the present invention is to provide a kind of raising potassium sulfate compound fertilizer granule strengths
Additive and high-strength complex Hefei particle preparation method, the additive applies in compound fertilizer granulating, can effectively enhance
The intensity of compound fertilizer granules substantially reduces the probability of dusting and agglomeration.
What the object of the invention was realized in: a kind of additive improving potassium sulfate compound fertilizer granule strength, it is crucial
It is to be prepared from the following raw materials: phosphoric acid,diluted, potassium sulfate solid, sulfuric acid.
Preferably, the concentration of above-mentioned phosphoric acid,diluted is 20-32%P2O5, the mass concentration of the sulfuric acid is 98%.
Preferably, the weight ratio of above-mentioned phosphoric acid,diluted, potassium sulfate solid and sulfuric acid is 1:(1~3): (1.4~2).
Preferably, above-mentioned additive is made by the following method: phosphoric acid,diluted and potassium sulfate solid are stirred in proportion
Afterwards, it then is sent in tubular reactor and reacts together with sulfuric acid and steam, potassium acid sulfate, potassium sulfate and the phosphoric acid melting material of generation
Slurry, as additive, while recycling a large amount of high-temperature high-pressure overheat steams of generation.
A kind of preparation method of high-strength complex Hefei particle, key are to comprise the steps of:
(1) after phosphoric acid,diluted and potassium sulfate solid being stirred, then with sulfuric acid and steam it is sent to tubular reactor together
Interior reaction generates potassium acid sulfate, potassium sulfate and phosphoric acid melting slurry, and recycles a large amount of high-temperature high-pressure overheat steams of generation；
(3) potassium acid sulfate, potassium sulfate and phosphoric acid melting slurry are sent to pelletizer mouth and is atomized, and through ammonia ammonia
Change, while spraying granulation is carried out to fertilizer；
(4) compound fertilizer's material after spraying is granulated continues bonded pelleting in pelletizer；
(5) compound fertilizer's fertilizer after bonded pelleting obtains complex fertilizer product after drying, screening, cooling and packaging.
Preferably, the concentration of phosphoric acid,diluted is 20-32%P in above-mentioned steps (1)2O5, the mass concentration of the sulfuric acid is
98%.
Preferably, the weight ratio of phosphoric acid,diluted, potassium sulfate solid and sulfuric acid is 1:(1~3 in above-mentioned steps (1)): (1.4~
2)。
Principle: potassium sulfate will be starched again to form transportable slurry with a certain amount of water, the concentrated sulfuric acid with addition
Mixing, the concentrated sulfuric acid are diluted and are chemically reacted with potassium sulfate, 1. such as reaction equation, generate the potassium sulfate that temperature is more than 140 DEG C
With potassium acid sulfate mixing high temperature slurry, then with the ammonia (NH that is filled into pelletizer3) generation potassium sulfate and ammonium sulfate are reacted, such as react
2. formula, not only increases the amount of liquid phase of bed in pelletizer, but also after the flash distillation of high temperature mixed slurry, form potassium sulfate and ammonium sulfate knot
Crystalline substance, bonding surrounding material granulating is to increase particle intensity.Test result shows: it is raw to improve traditional compound fertilizer using the present invention
The potassium sulfate compound fertilizer stable product quality of production. art production, average grain intensity is increased to 35~50 newton, than traditional
The potassium sulfate compound fertilizer average grain intensity of compound fertilizer production technology production improves 15~30 newton.
K2SO4+H2SO4→2KHSO4...................................①
2KHSO4+NH3→K2SO4+(NH4)2SO4........................②
The utility model has the advantages that
A kind of preparation for the additive and high-strength complex Hefei particle for improving potassium sulfate compound fertilizer granule strength of the present invention
Method, dividing using potassium acid sulfate solubility is nearly 4.5 times of potassium sulfate solubility, and potassium sulfate solubility is 110g/L (20 DEG C), sulphur
Potassium hydrogen phthalate is solubility 490g/L (20 DEG C), converts the bigger potassium acid sulfate of solubility for potassium sulfate, increases in pelletizer and glue
Property amount of substance (liquid phase) reduce compound fertilizer's processing, store and transported to effectively improve the intensity of potassium sulfate compound fertilizer
The probability of secondary dusting and agglomeration in journey.
Specific embodiment
Below with reference to embodiment and Fig. 1, the invention will be further described.
Embodiment 1:
A kind of additive improving potassium sulfate compound fertilizer granule strength, raw material are by 200 parts of sulfuric acid, 100 parts of concentration
25%P2O5Phosphoric acid,diluted, 300 parts of mass concentrations be 98% potassium sulfate solid composition.
A kind of preparation method of high-strength complex Hefei particle, comprises the steps of:
1, it takes in 100 parts of phosphoric acid,diluteds and 300 parts of potassium sulfate solid slurry vessels, stirs into the mixture of potassium sulfate and phosphoric acid,diluted
Slurry；
2, mixed slurry obtained above is sent in tubular reactor with 200 parts of sulfuric acid, steam and is reacted, produced
Raw a large amount of high-temperature high-pressure overheat steam, generates potassium acid sulfate, potassium sulfate and phosphoric acid melting slurry；
3,1531 parts of powder ammonium phosphates, 1769 parts of urea, 555 parts of ammonium sulfate, 230 parts of clays and 2931 parts of potassium sulfates are sent into
Pelletizer is granulated after obtaining fertiliser granulates, while above-mentioned potassium acid sulfate, potassium sulfate and phosphoric acid melting slurry being atomized, and passes through
Ammonia ammonification carries out spraying granulation to fertiliser granulates；
4, compound fertilizer's material after atomizing spraying is granulated continues bonded pelleting in pelletizer；
5, complex fertilizer product is obtained after drying, screening, cooling and packaging from compound fertilizer's fertilizer that pelletizer is discharged.
Implementation result: with this Case Experiments On A the result shows that: using 16-9-21 potassium sulfate compound fertilizer produced by the invention with
Do not add additivated 16-9-21 potassium sulfate compound fertilizer particle to compare, the present embodiment particle is more smooth, mellow and full, and particle is strong
Bigger, average particle strength 35N is spent, the intensity 15N than not adding additivated potassium sulfate compound fertilizer particle is higher by 20N.
Embodiment 2:
A kind of additive improving potassium sulfate compound fertilizer granule strength, raw material are by 160 parts of sulfuric acid, 100 parts of concentration
20.78%P2O5Phosphoric acid,diluted, 300 parts of mass concentrations be 98% potassium sulfate solid composition.
A kind of preparation method of high-strength complex Hefei particle, comprises the steps of:
1, it takes in 100 parts of phosphoric acid,diluteds and 300 parts of potassium sulfate solid slurry vessels, stirs into the mixture of potassium sulfate and phosphoric acid,diluted
Slurry；
2, mixed slurry obtained above is sent in tubular reactor with 160 parts of sulfuric acid, steam and is reacted, produced
Raw a large amount of high-temperature high-pressure overheat steam, generates potassium acid sulfate, potassium sulfate and phosphoric acid melting slurry；
3,2106 parts of powder ammonium phosphates, 813 parts of urea, 906 parts of ammonium sulfate, 250 parts of clays and 1544 parts of potassium sulfates are sent into
Pelletizer is granulated after obtaining fertiliser granulates, while above-mentioned potassium acid sulfate, potassium sulfate and phosphoric acid melting slurry being atomized, and passes through
Ammonia ammonification carries out spraying granulation to fertiliser granulates；
4, compound fertilizer's material after atomizing spraying is granulated continues bonded pelleting in pelletizer；
5, complex fertilizer product is obtained after drying, screening, cooling and packaging from compound fertilizer's fertilizer that pelletizer is discharged.
Implementation result: with this Case Experiments On A the result shows that: use 15-15-15 potassium sulfate compound fertilizer produced by the invention
Compared with not adding additivated 15-15-15 potassium sulfate compound fertilizer particle, the present embodiment particle is more smooth, mellow and full, particle
Intensity is bigger, average particle strength 50N, and the intensity 20N than not adding additivated potassium sulfate compound fertilizer particle is higher by 30N.
Embodiment 3:
A kind of additive improving potassium sulfate compound fertilizer granule strength, raw material are by 140 parts of sulfuric acid, 100 parts of concentration
20%P2O5Phosphoric acid,diluted, 100 parts of mass concentrations be 98% potassium sulfate solid composition.
A kind of preparation method of high-strength complex Hefei particle, comprises the steps of:
1, it takes in 100 parts of phosphoric acid,diluteds and 100 parts of potassium sulfate solid slurry vessels, stirs into the mixture of potassium sulfate and phosphoric acid,diluted
Slurry；
2, mixed slurry obtained above is sent in tubular reactor with 140 parts of sulfuric acid, steam and is reacted, produced
Raw a large amount of high-temperature high-pressure overheat steam, generates potassium acid sulfate, potassium sulfate and phosphoric acid melting slurry；
3,2106 parts of powder ammonium phosphates, 813 parts of urea, 932 parts of ammonium sulfate, 250 parts of clays and 1744 parts of potassium sulfates are sent into
Pelletizer is granulated after obtaining fertiliser granulates, while above-mentioned potassium acid sulfate, potassium sulfate and phosphoric acid melting slurry being atomized, and passes through
Ammonia ammonification carries out spraying granulation to fertiliser granulates；
4, compound fertilizer's material after atomizing spraying is granulated continues bonded pelleting in pelletizer；
5, complex fertilizer product is obtained after drying, screening, cooling and packaging from compound fertilizer's fertilizer that pelletizer is discharged.
Implementation result: with this Case Experiments On A the result shows that: use 15-15-15 potassium sulfate compound fertilizer produced by the invention
Compared with not adding additivated 15-15-15 potassium sulfate compound fertilizer particle, the present embodiment particle is more smooth, mellow and full, particle
Intensity is bigger, average particle strength 45N, and the intensity 20N than not adding additivated potassium sulfate compound fertilizer particle is higher by 25N.
Embodiment 4:
A kind of additive improving potassium sulfate compound fertilizer granule strength, raw material are by 170 parts of sulfuric acid, 100 parts of concentration
32%P2O5Phosphoric acid,diluted, 200 parts of mass concentrations be 98% potassium sulfate solid composition.
A kind of preparation method of high-strength complex Hefei particle, comprises the steps of:
1, it takes in 100 parts of phosphoric acid,diluteds and 100 parts of potassium sulfate solid slurry vessels, stirs into the mixture of potassium sulfate and phosphoric acid,diluted
Slurry；
2, mixed slurry obtained above is sent in tubular reactor with 170 parts of sulfuric acid, steam and is reacted, produced
Raw a large amount of high-temperature high-pressure overheat steam, generates potassium acid sulfate, potassium sulfate and phosphoric acid melting slurry；
3,2106 parts of powder ammonium phosphates, 813 parts of urea, 932 parts of ammonium sulfate, 250 parts of clays and 1744 parts of potassium sulfates are sent into
Pelletizer is granulated after obtaining fertiliser granulates, while above-mentioned potassium acid sulfate, potassium sulfate and phosphoric acid melting slurry being atomized, and passes through
Ammonia ammonification carries out spraying granulation to fertiliser granulates；
4, compound fertilizer's material after atomizing spraying is granulated continues bonded pelleting in pelletizer；
5, complex fertilizer product is obtained after drying, screening, cooling and packaging from compound fertilizer's fertilizer that pelletizer is discharged.
Implementation result: with this Case Experiments On A the result shows that: use 15-15-15 potassium sulfate compound fertilizer produced by the invention
Compared with not adding additivated 15-15-15 potassium sulfate compound fertilizer particle, the present embodiment particle is more smooth, mellow and full, particle
Intensity is bigger, average particle strength 50N, and the intensity 20N than not adding additivated potassium sulfate compound fertilizer particle is higher by 30N.
Finally, it should be noted that foregoing description is only the preferred embodiment of the present invention, the ordinary skill people of this field
Member under the inspiration of the present invention, without prejudice to the purpose of the present invention and the claims, can make multiple similar tables
Show, such transformation is fallen within the scope of protection of the present invention.
Claims (3)
1. a kind of additive for improving potassium sulfate compound fertilizer granule strength, it is characterised in that solid by raw material phosphoric acid,diluted, potassium sulfate
Body, sulfuric acid are made in the following manner: after phosphoric acid,diluted and potassium sulfate solid are stirred in proportion, then with sulfuric acid and steam one
And it is sent to reaction in tubular reactor, potassium acid sulfate, potassium sulfate and the phosphoric acid melting slurry of generation, as additive, simultaneously
Recycle a large amount of high-temperature high-pressure overheat steams generated；The concentration of the phosphoric acid,diluted is 20-32%P2O5, the mass concentration of the sulfuric acid
It is 98%；The weight ratio of the phosphoric acid,diluted, potassium sulfate solid and sulfuric acid is 1:(1 ~ 3): (1.4 ~ 2).
2. a kind of preparation method of high-strength complex Hefei particle, it is characterised in that comprise the steps of:
(1) it after phosphoric acid,diluted and potassium sulfate solid being stirred, then is sent in tubular reactor together instead with sulfuric acid and steam
It answers, generates potassium acid sulfate, potassium sulfate and phosphoric acid melting slurry, and recycle a large amount of high-temperature high-pressure overheat steams of generation；
(2) potassium acid sulfate, potassium sulfate and phosphoric acid melting slurry are sent to pelletizer mouth and are atomized, and through ammonia ammonification,
Spraying granulation is carried out to fertilizer simultaneously；
(3) compound fertilizer's material after spraying is granulated continues bonded pelleting in pelletizer；
(4) compound fertilizer's fertilizer after bonded pelleting obtains complex fertilizer product after drying, screening, cooling and packaging；
The weight ratio of phosphoric acid,diluted, potassium sulfate solid and sulfuric acid is 1:(1 ~ 3 in the step (1)): (1.4 ~ 2).
3. a kind of preparation method of high-strength complex Hefei particle according to claim 2, it is characterised in that: the step
(1) concentration of phosphoric acid,diluted is 20-32%P in2O5, the mass concentration of the sulfuric acid is 98%.
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| CN109956763A (en) * | 2017-12-25 | 2019-07-02 | 中蓝连海设计研究院有限公司 | A kind of method and potassium sulfate prilling process improving granular potassium sulfate intensity |
| CN109956823B (en) * | 2019-04-25 | 2022-01-14 | 郑州大学 | Production method of potassium sulfate fertilizer granules |
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| CN1016774B (en) * | 1984-02-28 | 1992-05-27 | 窒素股份有限公司 | Dry process for neutralizing potassium sulfate produced from potassium chloride and sulfuric acid |
| CN1280111A (en) * | 1999-07-13 | 2001-01-17 | 李守义 | Middle concentrate compound potassium sulfate fertilizer and its producing method |
| CN1266833A (en) * | 1999-08-13 | 2000-09-20 | 南化集团设计院 | New method for producing potassium sulfate type compound fertilizer by drum ammoniation |
| CN101318855B (en) * | 2007-06-07 | 2011-04-20 | 湖北洋丰股份有限公司 | High-efficiency high-concentration sulphur based complex fertilizer |
| CN101367682B (en) * | 2008-09-28 | 2011-06-15 | 中国海洋石油总公司 | Method for preparing complex fertilizer with mutual solution slip tubular reactor |
| CN101817706B (en) * | 2009-12-18 | 2012-07-04 | 聊城鲁西化工第五化肥厂 | Production method for potassium sulfate compound fertilizer |
| CN101734973A (en) * | 2009-12-25 | 2010-06-16 | 聊城鲁西化工第四化肥厂 | Method for making particle compound fertilizer from potassium fluoaluminate |
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Effective date of registration: 20190107 Address after: 650000 Jinsuo Township Industrial Park, Xundian County, Kunming City, Yunnan Province Applicant after: Zhong Hua Yunlong company limited Address before: 618000 4th Floor, E10 Headquarters Economic Port, 888 Chenglong Avenue, Longquanyi, Chengdu, Sichuan Province Applicant before: Chengdu research and development centre of Zhong Hua chemical fertilizer company limited |
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