CN104109055A - Preparation method for organic sustained-release nitrogen fertilizer - Google Patents
Preparation method for organic sustained-release nitrogen fertilizer Download PDFInfo
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- CN104109055A CN104109055A CN201410301769.7A CN201410301769A CN104109055A CN 104109055 A CN104109055 A CN 104109055A CN 201410301769 A CN201410301769 A CN 201410301769A CN 104109055 A CN104109055 A CN 104109055A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/22—Improving land use; Improving water use or availability; Controlling erosion
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
- Y02P60/21—Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures
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Abstract
The invention relates to a preparation method for an organic sustained-release nitrogen fertilizer. The preparation method comprises the steps of reacting biological carbon, nitric acid and ammonia water; granulating a mixture obtained after reaction; adding granular fertilizer into a granulating machine; spraying a dispersion glue solution under rotation of the granulating machine to make the dispersion glue solution uniformly distributed on surfaces of the granular fertilizer; spraying a mixture of calcium oxide and dehydrated gypsum powder and coating the surfaces of the granular fertilizer; drying the coated granular fertilizer and screening to obtain the organic sustained-release nitrogen fertilizer. Weak alkaline substances released by the organic sustained-release nitrogen fertilizer can regulate acid soil and overcome daily acidification of the soil. The organic sustained-release nitrogen fertilizer can increase output of crops as well as improve quality of the crops, under the same application amount of nitrogen, phosphorus and potassium.
Description
Technical field
The present invention relates to fertilizer production technology field, specifically relate to a kind of organic slowrelease nitrogen fertilizer preparation method.
Background technology
Farm crop produce and mainly depend on nitrogenous fertilizer, and it is the fertilizer of consumption maximum during agroforestry are produced, and is also the fertilizer close with environmental quality.Because traditional nitrogenous fertilizer has fabulous water-solublely, in soil, dissolve soon, discharge soon, its validity period is short.At Nitrogen In Soils fertilizer, be easy to produce ammonia volatilization, nitrate leaching and denitrifying N
2o release And Spread of Solute, these can cause the problems such as air, water surrounding and water pollution, Greenhouse effect respectively.
Take urea as main nitrogenous fertilizer, and the speed of its nitre solution and ammonification is very fast, in the middle of current proportion of crop planting, often causes nitrogenous fertilizer surplus in early stage, cause excessive growth, and the later stage is de-fertile, and China's utilization rate of nitrogen fertilizer only has 30% at present.The development of sustained-controll-release fertiliser is extremely urgent.Slow-release or control-release fertilizer, as a kind of new high-tech product of environment-friendly type, has raising chemical fertilizer utilization ratio, reduces fertilizer application amount and fertilizer application frequency, save labor force, reducing environmental pollution, improve the advantages such as quality of agricultural product, is the carrier of the technology of applying fertilizers scientifically and a trend of fertilizer development.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of organic slowrelease nitrogen fertilizer preparation method.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of organic slowrelease nitrogen fertilizer preparation method, it is characterized in that, and comprise the following steps:
Step (1), particle diameter is no more than 3 millimeters, and biological carbon, nitric acid and ammoniacal liquor that total carbon content is not less than 40 % by weight react, and step (2) is carried out granulation to the reacted mixture of step (1); Step (3) granulated fertilizer adds in tablets press; Step (4) is under tablets press rotating condition, spray into dispersion glue, make to disperse glue to be evenly distributed on the surface of granulated fertilizer, step (5), the mixture of calcium oxide and dehydrated gypsum powder is sprayed and is coated on granulated fertilizer surface, and the ratio of the mixture three's of described granulated fertilizer, dispersion glue and calcium oxide and dehydrated gypsum powder parts by weight is 65～70:1～5:20～25; Step (6), dries the granulated fertilizer being wrapped by sieve, and can be made into organic slowrelease nitrogen fertilizer.
The invention has the beneficial effects as follows: utilized charcoal can reactive chemistry group (as carboxyl, hydroxyl) and can become the feature of hydrogen bond atom (as hydrogen, oxygen), utilize nitric acid, or ammoniacal liquor is sequentially manufactured the organic slowrelease nitrogen fertilizer with charcoal with different sticking intensity or sustained releasing character from charcoal differential responses; And the final release of organic slowrelease nitrogen fertilizer prepared by the preparation method who adopts coating method is calcium constituent, does not form environmental pollution, environmental protection is completely residual without nuisance, can effectively control the release of nitrogenous fertilizer; Can reduce adhesive material consumption, reduce costs, can also supplement the calcium constituent in soil; The weakly alkaline material discharging, adjustable acid soil, the acidifying day by day that solves soil; Not only can improve the output of farm crop, and can promote its quality, in the situation that keeping equal nitrogen phosphorus potassium amount of application.
On the basis of technique scheme, the present invention can also do following improvement.
Further, the proportioning of described charcoal, nitric acid and ammoniacal liquor is 30～40 weight part charcoals; 6～8 weight part nitric acid; 5～8 weight part ammoniacal liquor.
Further, step (2), adds 2～5 weight parts to be coated binding agent in when reacted mixture carries out granulation.
Further, step (1) charcoal is first to react with nitric acid, and then react with ammoniacal liquor, it is that charcoal is put into and filled the reactor of nitric acid or in holding the equipment of charcoal, nitric acid sprayed on charcoal that charcoal first reacts with nitric acid, then in the reaction product of charcoal and nitric acid, adds or spray ammoniacal liquor.
Further, described dispersion glue is that polymer latex is the mixture of polyvinyl alcohol, polyvinyl acetate emulsion and polyacrylate emulsion.
Further, disperseing the concentration of glue is 15 to 20%.
Accompanying drawing explanation
Fig. 1 is that the present invention is that Nitrogen attainment prepared by a kind of organic slowrelease nitrogen fertilizer preparation method is divided and delayed release property detected result.
Embodiment
Below in conjunction with accompanying drawing, principle of the present invention and feature are described, example, only for explaining the present invention, is not intended to limit scope of the present invention.
Embodiment 1 charcoal used is particle diameter≤3 millimeter, and quality is 500kg.
Bamboo charcoal charcoal, by promoting bunker lift to feed bin, is then sent to the metering of bamboo charcoal charcoal in the first rotary drum by feed bin discharge hole and metering conveying belt.
Industrial nitric acid (concentration expressed in percentage by weight 50%～70%) or concentrated nitric acid (concentration expressed in percentage by weight 98%) being watered in diluting reaction is filled with and being diluted to concentration expressed in percentage by weight is 30%.Industrial ammonia (concentration expressed in percentage by weight is 18～28%%) or liquefied ammonia are watered in diluting reaction tank to be diluted to concentration expressed in percentage by weight be 15%.
30% salpeter solution is sprayed on the bamboo charcoal charcoal particle moving in the first rotary drum by nitric acid transfer lime and shower nozzle, and straying quatity is 1237kg.Keep bamboo charcoal charcoal in the first rotary drum, to move 15～30 minutes, obtain just stage material, and the first stage material that moves to the first rotary drum end is delivered in the second rotary drum.
15% ammonia soln is sprayed by ammoniacal liquor transfer lime and shower nozzle on the first stage material moving in the second rotary drum, and straying quatity is 1113kg.Keep just stage material run duration in the second rotary drum between 15～30 minutes, at the second rotary drum end, to obtain time stage material, it is delivered among the 3rd rotary drum by e Foerderanlage, the 3rd rotary drum is granulating rotating drum.
Under tablets press rotating condition, spraying into polymer latex is polyvinyl alcohol, the mixture of polyvinyl acetate emulsion and polyacrylate emulsion, making polymer latex is polyvinyl alcohol, the mixture of polyvinyl acetate emulsion and polyacrylate emulsion is evenly distributed on the surface of granulated fertilizer, the mixture of calcium oxide and dehydrated gypsum powder is sprayed and is coated on granulated fertilizer surface, and described granulated fertilizer, polymer latex is polyvinyl alcohol, the ratio of the mixture three's of the mixture of polyvinyl acetate emulsion and polyacrylate emulsion and calcium oxide and dehydrated gypsum powder parts by weight is 65:5:20, the granulated fertilizer being wrapped by is dried and sieved, can be made into organic slowrelease nitrogen fertilizer.
Embodiment 2
Embodiment 2 charcoal used is particle diameter≤3 millimeter, and quality is 800kg.
Charcoal charcoal, by promoting bunker lift to feed bin, is then sent to the metering of charcoal charcoal in the first rotary drum by feed bin discharge hole and metering conveying belt.
Industrial nitric acid (concentration expressed in percentage by weight 50%～70%) or concentrated nitric acid (concentration expressed in percentage by weight 98%) being watered in diluting reaction is filled with and being diluted to concentration expressed in percentage by weight is 30%.Industrial ammonia (concentration expressed in percentage by weight is 18～28%) or liquefied ammonia are watered in diluting reaction tank to be diluted to concentration expressed in percentage by weight be 15%.
The spray that 15% ammonia soln is measured by transport pipe and shower nozzle is to the charcoal charcoal particle moving in the first rotary drum, and straying quatity is 200kg.Keep charcoal charcoal particle in the first rotary drum, to move 15～30 minutes, obtain just stage material, and the first stage material that moves to the first rotary drum end is delivered in the second rotary drum.
The spray that 30% salpeter solution is measured by transport pipe and shower nozzle is to the first stage material moving in the second rotary drum, and straying quatity is 400kg.Keep just stage material run duration in rotary drum between 15～30 minutes, at the second rotary drum end, to obtain time stage material, it is delivered among the 3rd rotary drum by e Foerderanlage, the 3rd rotary drum is granulating rotating drum.
Under tablets press rotating condition, spraying into polymer latex is polyvinyl alcohol, the mixture of polyvinyl acetate emulsion and polyacrylate emulsion, making polymer latex is polyvinyl alcohol, the mixture of polyvinyl acetate emulsion and polyacrylate emulsion is evenly distributed on the surface of granulated fertilizer, the mixture of calcium oxide and dehydrated gypsum powder is sprayed and is coated on granulated fertilizer surface, and described granulated fertilizer, polymer latex is polyvinyl alcohol, the ratio of the mixture three's of the mixture of polyvinyl acetate emulsion and polyacrylate emulsion and calcium oxide and dehydrated gypsum powder parts by weight is 70:5:25, the granulated fertilizer being wrapped by is dried and sieved, can be made into organic slowrelease nitrogen fertilizer.
Embodiment 3
Embodiment 3 charcoal used is with Oil Residue, through gasification, to produce the dregs of fat charcoal obtaining, particle diameter≤3 millimeter, and quality is 600kg.
Dregs of fat charcoal, by promoting bunker lift to feed bin, is then sent to the metering of dregs of fat charcoal in the first rotary drum by feed bin discharge hole and metering conveying belt.
Industrial nitric acid (concentration expressed in percentage by weight 50%～70%) or concentrated nitric acid (concentration expressed in percentage by weight 98%) being watered in diluting reaction is filled with and being diluted to concentration expressed in percentage by weight is 30%.Industrial ammonia (concentration expressed in percentage by weight is 18～28%%) or liquefied ammonia are watered in diluting reaction tank to be diluted to concentration expressed in percentage by weight be 15%.
30% salpeter solution is sprayed on the dregs of fat charcoal particle moving in the first rotary drum by nitric acid transfer lime and shower nozzle, and straying quatity is 987kg.Keep dregs of fat charcoal in the first rotary drum, to move 15～30 minutes, obtain just stage material, and the first stage material that moves to the first rotary drum end is delivered in the second rotary drum.
15% ammonia soln is sprayed by ammoniacal liquor transfer lime and shower nozzle on the first stage material moving in the second rotary drum, and straying quatity is 493kg.Keep just stage material run duration in the second rotary drum between 15～30 minutes, at the second rotary drum end, to obtain time stage material, it is delivered among the 3rd rotary drum by e Foerderanlage, the 3rd rotary drum is granulating rotating drum.
Under tablets press rotating condition, spraying into polymer latex is polyvinyl alcohol, the mixture of polyvinyl acetate emulsion and polyacrylate emulsion, making polymer latex is polyvinyl alcohol, the mixture of polyvinyl acetate emulsion and polyacrylate emulsion is evenly distributed on the surface of granulated fertilizer, the mixture of calcium oxide and dehydrated gypsum powder is sprayed and is coated on granulated fertilizer surface, and described granulated fertilizer, polymer latex is polyvinyl alcohol, the ratio of the mixture three's of the mixture of polyvinyl acetate emulsion and polyacrylate emulsion and calcium oxide and dehydrated gypsum powder parts by weight is 65:5:25, the granulated fertilizer being wrapped by is dried and sieved, can be made into organic slowrelease nitrogen fertilizer.
Embodiment 4: nitrogen nutrient delays release property and detects
Testing method: each 2.5g of organic slowrelease nitrogen fertilizer sample that takes preparation in embodiment 1 and embodiment 2, add in the beaker that fills 200ml distilled water, with sealed membrane, seal, the thermostat container that is placed in 25 ℃ is cultivated, every 24h sampling once, every sub-sampling 10ml, covers equal quantities distilled water again after sampling, so repeatedly, sample altogether 7 times.Sample adopts full nitrogen analysis method to measure the total nitrogen content in sample liquid after constant volume respectively.
Fig. 1 is that the organic slowrelease nitrogen fertilizer sample of preparation in embodiment 1 and embodiment 2 discharges per-cent at different time nitrogen.24h: embodiment 1 organic slowrelease nitrogen fertilizer sample nitrogen is released to 15%, embodiment, 2 organic slowrelease nitrogen fertilizer sample nitrogen and is released to 20%; 48h: embodiment 1 organic slowrelease nitrogen fertilizer sample nitrogen is released to 22%, embodiment, 2 organic slowrelease nitrogen fertilizer sample nitrogen and is released to 53%; 72h: embodiment 1 organic slowrelease nitrogen fertilizer sample nitrogen is released to 50%, embodiment, 2 organic slowrelease nitrogen fertilizer sample nitrogen and is released to 90%.
By above-described embodiment 4, can prove that nitrogen in organic slowrelease nitrogen fertilizer prepared by the present invention has nitrogen nutrient and delays release characteristic.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (6)
1. an organic slowrelease nitrogen fertilizer preparation method, is characterized in that, comprises the following steps:
Step (1), particle diameter is no more than 3 millimeters, and biological carbon, nitric acid and ammoniacal liquor that total carbon content is not less than 40 % by weight react, and step (2) is carried out granulation to the reacted mixture of step (1); Step (3) granulated fertilizer adds in tablets press; Step (4) is under tablets press rotating condition, spray into dispersion glue, make to disperse glue to be evenly distributed on the surface of granulated fertilizer, step (5), the mixture of calcium oxide and dehydrated gypsum powder is sprayed and is coated on granulated fertilizer surface, and the ratio of the mixture three's of described granulated fertilizer, dispersion glue and calcium oxide and dehydrated gypsum powder parts by weight is 65～70:1～5:20～25; Step (6), dries the granulated fertilizer being wrapped by sieve, and can be made into organic slowrelease nitrogen fertilizer.
2. a kind of organic slowrelease nitrogen fertilizer preparation method according to claim 1, is characterized in that, the proportioning of described charcoal, nitric acid and ammoniacal liquor is 30～40 weight part charcoals; 6～8 weight part nitric acid; 5～8 weight part ammoniacal liquor.
3. a kind of organic slowrelease nitrogen fertilizer preparation method according to claim 1, is characterized in that, step (2) adds 2～5 weight parts to be coated binding agent in when reacted mixture carries out granulation.
4. a kind of organic slowrelease nitrogen fertilizer preparation method according to claim 1, it is characterized in that, step (1) charcoal is first to react with nitric acid, and then react with ammoniacal liquor, it is that charcoal is put into and filled the reactor of nitric acid or in holding the equipment of charcoal, nitric acid sprayed on charcoal that charcoal first reacts with nitric acid, then in the reaction product of charcoal and nitric acid, adds or spray ammoniacal liquor.
5. a kind of organic slowrelease nitrogen fertilizer preparation method according to claim 1, is characterized in that, described dispersion glue is that polymer latex is the mixture of polyvinyl alcohol, polyvinyl acetate emulsion and polyacrylate emulsion.
6. according to a kind of organic slowrelease nitrogen fertilizer preparation method described in claim 1 to 5 any one, it is characterized in that, disperseing the concentration of glue is 15 to 20%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410301769.7A CN104109055A (en) | 2014-06-27 | 2014-06-27 | Preparation method for organic sustained-release nitrogen fertilizer |
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| CN201410301769.7A CN104109055A (en) | 2014-06-27 | 2014-06-27 | Preparation method for organic sustained-release nitrogen fertilizer |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101575243A (en) * | 2009-06-15 | 2009-11-11 | 李保华 | Method for producing calcium-magnesium-sulfur coated slow release fertilizer |
| CN102424633A (en) * | 2011-09-14 | 2012-04-25 | 常大勇 | Self-curing film-coated controlled release fertilizer and preparation method thereof |
| CN103288541A (en) * | 2013-06-03 | 2013-09-11 | 西北农林科技大学 | Carbon-based slow release nitrogen fertilizer and preparation method thereof |
-
2014
- 2014-06-27 CN CN201410301769.7A patent/CN104109055A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101575243A (en) * | 2009-06-15 | 2009-11-11 | 李保华 | Method for producing calcium-magnesium-sulfur coated slow release fertilizer |
| CN102424633A (en) * | 2011-09-14 | 2012-04-25 | 常大勇 | Self-curing film-coated controlled release fertilizer and preparation method thereof |
| CN103288541A (en) * | 2013-06-03 | 2013-09-11 | 西北农林科技大学 | Carbon-based slow release nitrogen fertilizer and preparation method thereof |
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Application publication date: 20141022 |