CN108752075A - The production method and production line of nitrogenous potassium dual-sustained-release composite fertilizer - Google Patents
The production method and production line of nitrogenous potassium dual-sustained-release composite fertilizer Download PDFInfo
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- CN108752075A CN108752075A CN201810599146.0A CN201810599146A CN108752075A CN 108752075 A CN108752075 A CN 108752075A CN 201810599146 A CN201810599146 A CN 201810599146A CN 108752075 A CN108752075 A CN 108752075A
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- Prior art keywords
- sustained
- urea
- added
- release
- potassium
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C9/00—Fertilisers containing urea or urea compounds
- C05C9/02—Fertilisers containing urea or urea compounds containing urea-formaldehyde condensates
Abstract
The present invention relates to the production methods of nitrogenous potassium dual-sustained-release composite fertilizer.(1) urea is added in reaction kettle, water is added to stir；PH to 8~9 is adjusted with borax and potassium hydroxide, the formalin that quality is 37% is added by urea and formaldehyde mole ratio 1.2~1.5: 1, about 60min is stirred to react at 75~80 DEG C；(2) the oxidized starch that quality is urea 8%~10% is added, stirs 15~20min；Reaction kettle pH value of solution is adjusted to 4.0~4.5 with acidic materials, and 30~60min is stirred to react at 85~90 DEG C；PH is adjusted to neutrality with alkaline matter, obtains sustained-release adhesive；45~55r/min of speed of agitator obtains the suitable sustained-release adhesive of viscosity；(3) by ureaformaldehyde, by the absorption slot of potassium sulfate that reaction kettle injection contains, the reaction was continued, so that milk is become creamy white caking, is made after centrifugation-drying-crushing-classification sieving.
Description
Technical field
The present invention relates to agricultural biological technical field more particularly to a kind of production methods of nitrogenous potassium dual-sustained-release composite fertilizer
And production line.
Background technology
Since the extensive application of chemical fertilizer, revolutionary change has occurred in planting industry, and it is in several times to make global agricultural product
Growth.But the loss waste of the nutrient of chemical fertilizer not only brings huge economic loss to society, but also can cause tight
The environmental pollution of weight, therefore raising utilization rate of fertilizer, reduction dose, saving labor of fertilizer application power are particularly important.Nineteen twenty-four,
One kind by urea and formaldehyde condensation into again by its again with the compounded slow-release compound fertilizer of raw materials such as monoammonium phosphate and potash fertilizer
(MU) it is succeeded in developing by BASF Corp. of Germany, and obtains the 1st ureaformaldehyde slow release fertilizer patent in the world；Nineteen fifty-five, urea-formaldehyde fertilizer
Start to commercially produce as earliest slow release fertilizer, and be the maximum kind of yield in world's slow release fertilizer, it is slow to account for the world
50% or more of release fertilizer total output.Slow-release or control-release fertilizer is allowed to absorb with crop nutrition content by the regulation and control to nutrient release rate basic
It is synchronised, is greatly improved fertilizer nutrient utilization, reduces agricultural non-point source pollution, meet the requirement of agricultural sustainable development.
Invention content
The object of the present invention is to provide a kind of to be condensed into 1 methyl, 2 urea and 2 methylenes after the completion of traditional ureaformaldehyde reaction
The condensation product (two kinds of colloids) of base urea, then it regard potassium sulfate raw material (powder) as ureaformaldehyde in the direct absorbing reaction kettle of solid content,
Thus a kind of new ureaformaldehyde and potassium sulfate mixture are generated, obtaining has nitrogenous dual-sustained-release effect nitrogenous potassium pair containing potassium
Weight slow-release compound fertilizer.It is a further object of the present invention to provide a kind of using potassium sulfate as urea first in the direct absorbing reaction kettle of solid content
Aldehyde produces ureaformaldehyde and potassium sulfate mixing medicinal powder, and it is multiple to directly obtain the nitrogenous potassium dual-sustained-release containing potassium, the effect of nitrogen dual-sustained-release
The production method in Hefei.It is a further object of the present invention to provide a kind of simple in structure, high nitrogenous potassium dual-sustained-releases of production efficiency
The production line of composite fertilizer.
Technical solution of the invention is the production method of the nitrogenous potassium dual-sustained-release composite fertilizer, and special character exists
In including the following steps：
(1) the urea weighed is added into reaction kettle, water is added to stir to dissolve, amount of water be urea quality 1.5~
4.0 again；PH to 8~9 is adjusted with borax and potassium hydroxide, mass fraction, which is added, by urea and formaldehyde mole ratio 1.2~1.5: 1 is
37% formalin is stirred to react about 60min at 75~80 DEG C；
(2) the oxidized starch that quality is amount of urea 8%~10% is added, stirs 15~20min；It is adjusted with acidic materials
Reaction kettle pH value of solution continues to be stirred to react 30~60min at 85~90 DEG C to 4.0~4.5；Again with alkaline matter adjust pH to
Sustained-release adhesive is made in neutrality；Speed of agitator is advisable with 45~55r/min, to obtain the suitable sustained-release adhesive of viscosity；
(3) the reaction was continued and inhales for the absorption slot of the potassium sulfate ureaformaldehyde for preparing completion directly contained by reaction kettle injection
Wherein moisture is received, original milk is made to become creamy white caking, then passes through centrifugation-drying-crushing-classification sieving
The nitrogenous potassium dual-sustained-release composite fertilizer of different-grain diameter is made afterwards.
Preferably：(2) the step further comprises：The acidic materials are phosphoric acid, and the alkaline matter is calcium oxide,
Phosphorus, the calcium nutrient of fertilizer are increased while adjusting pH.
Another technical solution of the present invention is the production line of the nitrogenous potassium dual-sustained-release composite fertilizer, special character
It is, is made of tactic reaction kettle, absorption slot, centrifuge, drying box, cooler bin, pulverizer, classifying screen.
Compared with prior art, beneficial effects of the present invention：
(1) use potassium sulfate suction to receive ureaformaldehyde at relatively high temperatures, be swift in response, potassium ion is coated in rapidly bonding agent and works as
In；Ureaformaldehyde quickly lumps, and absorption efficiency is high.The slow-release compound fertilizer of the present invention is in addition to the characteristics of keeping slow-release nitrogen fertilizer, certain
The loss speed of potash fertilizer in the soil is slowed down in degree, to improve the utilization rate of potash fertilizer.
(2) the potassium aldehyde slow-release fertilizer of urea containing potassium has good nutrient slowly-released performance using ureaformaldehyde as skeleton.According to test, cold water
Insoluble nitrogen content reaches 22% (remaining is 10%), that is, it is cold water insoluble nitrogen to have 70% or so；Quick-acting potassium content about 25%, field
Experiments have shown that：The loss of the product potassium obviously slows down, and has achieved the effect that nitrogen potassium dual-sustained-release, has improved utilization rate of fertilizer.
(3) pulvis of the invention still keeps the bonding characteristic of ureaformaldehyde, and balling ratio is high in continuing granulation process, and particle is strong
Degree is big.
Description of the drawings
Fig. 1 is the Structural assignments schematic diagram of apparatus for production line of the present invention.
Specific implementation mode
The present invention is further detailed in conjunction with the accompanying drawings below：
Refering to Figure 1, the production line of the nitrogenous potassium dual-sustained-release composite fertilizer is by tactic reaction kettle, absorption
Slot, centrifuge, drying box, cooler bin, pulverizer, classifying screen composition.
【Embodiment 1】
The production method of the nitrogenous potassium dual-sustained-release composite fertilizer, includes the following steps：
(1) the urea weighed is added into reaction kettle, water is added to stir to dissolve, amount of water be urea quality 1.5~
4.0 again；PH to 8~9 is adjusted with borax and potassium hydroxide, mass fraction, which is added, by urea and formaldehyde mole ratio 1.2~1.5: 1 is
37% formalin is stirred to react about 60min at 75~80 DEG C；
(2) the oxidized starch that quality is amount of urea 8%~10% is added, stirs 15~20min；It is adjusted with acidic materials
Reaction kettle pH value of solution continues to be stirred to react 30~60min at 85~90 DEG C to 4.0~4.5；Again with alkaline matter adjust pH to
Sustained-release adhesive is made in neutrality；Speed of agitator is advisable with 45~55r/min, to obtain the suitable sustained-release adhesive of viscosity；It is described
Acidic materials are phosphoric acid, and the alkaline matter is calcium oxide, and phosphorus, the calcium nutrient of fertilizer are increased while adjusting pH；
(3) the reaction was continued and inhales for the absorption slot of the potassium sulfate ureaformaldehyde for preparing completion directly contained by reaction kettle injection
Wherein moisture is received, original milk is made to become creamy white caking, then passes through centrifugation-drying-crushing-classification sieving
The nitrogenous potassium dual-sustained-release composite fertilizer of different-grain diameter is made afterwards.
The weight percent of the nitrogen potassium dual-sustained-release fertilizer specific formula content：
30 formaldehyde of urea, 30 sodium hydroxide, 0.5 potassium sulfate 39.5
Operation principle:It is according to traditional ureaformaldehyde composite heat transfer principle, the urea of different mol ratio and formaldehyde is abundant
Reaction, forms the ureaformaldehyde of different condensation degrees, then the reaction was continued therewith with potassium sulfate rapidly, by ureaformaldehyde liquid absorption and passes through
The nitrogenous potassium dual-sustained-release composite fertilizer that different-grain diameter is made after centrifugation-drying-crushing-classification is sieved is crossed, wherein nitrogen and potassium are made
Elemental composition has the characteristics of sustained release.
The foregoing is merely presently preferred embodiments of the present invention, all equivalent changes done according to scope of the invention as claimed with
Modification, should all belong to the covering scope of the claims in the present invention.
Claims (3)
1. a kind of production method of nitrogenous potassium dual-sustained-release composite fertilizer, which is characterized in that include the following steps：
(1) the urea weighed is added into reaction kettle, water is added to stir to dissolve, amount of water is the 1.5~4.0 of urea quality
Times；PH to 8~9 is adjusted with borax and potassium hydroxide, mass fraction, which is added, by urea and formaldehyde mole ratio 1.2~1.5: 1 is
37% formalin is stirred to react about 60min at 75~80 DEG C；
(2) the oxidized starch that quality is amount of urea 8%~10% is added, stirs 15~20min；It is adjusted and is reacted with acidic materials
Kettle pH value of solution continues to be stirred to react 30~60min at 85~90 DEG C to 4.0~4.5；PH is adjusted into alkaline matter again
Property, sustained-release adhesive is made；Speed of agitator is advisable with 45~55r/min, to obtain the suitable sustained-release adhesive of viscosity；
(3) the reaction was continued and absorbs it for the absorption slot of the potassium sulfate ureaformaldehyde for preparing completion directly contained by reaction kettle injection
Middle moisture makes original milk become creamy white caking, is then made after centrifugation-drying-crushing-classification sieving
At the nitrogenous potassium dual-sustained-release composite fertilizer of different-grain diameter.
2. the production method of nitrogenous potassium dual-sustained-release composite fertilizer according to claim 1, which is characterized in that the step (2) into
One step includes：The acidic materials are phosphoric acid, and the alkaline matter is calcium oxide, and fertilizer is increased while adjusting pH
Phosphorus, calcium nutrient.
3. a kind of production line of nitrogenous potassium dual-sustained-release composite fertilizer, which is characterized in that by tactic reaction kettle, absorb slot,
Centrifuge, drying box, cooler bin, pulverizer, classifying screen composition.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN2018105402057 | 2018-05-30 | ||
| CN201810540205 | 2018-05-30 |
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| CN108752075A true CN108752075A (en) | 2018-11-06 |
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| CN201810599146.0A Pending CN108752075A (en) | 2018-05-30 | 2018-06-12 | The production method and production line of nitrogenous potassium dual-sustained-release composite fertilizer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114849632A (en) * | 2022-05-23 | 2022-08-05 | 中北大学 | Industrial continuous simplified preparation equipment and method for urea formaldehyde accurate-release nitrogen fertilizer or urea formaldehyde-based slow-release multi-nutrient fertilizer |
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| CN101817712A (en) * | 2009-02-26 | 2010-09-01 | 上海化工研究院 | Reactive type sustained-release fertilizer compounded by nitrification inhibitor/urea formaldehyde and preparation method thereof |
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Application publication date: 20181106 |