CN111153753A - Hemicin containing humic acid and production method thereof - Google Patents
Hemicin containing humic acid and production method thereof Download PDFInfo
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- CN111153753A CN111153753A CN202010026433.XA CN202010026433A CN111153753A CN 111153753 A CN111153753 A CN 111153753A CN 202010026433 A CN202010026433 A CN 202010026433A CN 111153753 A CN111153753 A CN 111153753A
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- urea
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C9/00—Fertilisers containing urea or urea compounds
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Abstract
The invention discloses a black urea containing humic acid, which consists of 0.1-10 wt% of humic acid and urea, and the balance being urea, and also discloses a concrete production method of the urea.
Description
Technical Field
The invention relates to the technical field of crop fertilizers, in particular to a humic acid-containing urea and a production method thereof.
Background
Humic acid is an organic fertilizer. The natural humic acid is formed by decomposing plant residues, widely exists in soil, river mud, shallowly buried weathered coal, turf and lignite, contains elements such as carbon, hydrogen, oxygen, nitrogen and the like, and has certain fertilizer efficiency. Most humic acid is difficult to dissolve in water, and if the humic acid is combined with nitrogen, potassium, sodium, ammonium and other substances, the humic acid is easy to be absorbed by plants after being dried in the sun and becomes necessary nutrient for plant growth. The urea is a quick-soluble fertilizer with the highest nitrogen content, is widely used for supplementing nitrogen fertilizers of various crops, and can be simply mixed with humic acid to form a compound fertilizer for use at present. However, the two fertilizers have no definite mixing ratio and no secondary processing technology, so that the utilization rate of the formed humic acid urea fertilizer product is only about 35%, and the phenomenon of loss of a large amount of nutrient components in urea and humic acid exists, thereby causing fertilizer waste.
Disclosure of Invention
The invention aims to solve the technical problem of providing urea containing humic acid, which is beneficial to reducing fertilizer loss and reducing the dosage of urea.
In order to solve the technical problems, the technical scheme of the invention is as follows: a black urea containing humic acid comprises 0.1-10% of humic acid and urea in parts by weight, and the balance of urea.
As a preferred technical scheme, the humic acid is 0.5 percent by weight, and the urea is 99.5 percent by weight.
As a preferred technical scheme, the humic acid is prepared from 3 weight parts of humic acid and 97 weight parts of urea.
As a preferred technical scheme, the humic acid is 5 weight parts, and the urea is 95 weight parts.
As a preferred technical scheme, the humic acid is 10 weight parts, and the urea is 90 weight parts.
The invention also provides a production method of the urea containing humic acid, which comprises the following steps,
step one, heating and drying humic acid in parts by weight until the water content of the humic acid is below 8% for later use;
step two, crushing the dried humic acid to more than 80 meshes to prepare humic acid powder, and uniformly mixing urea and the humic acid powder in parts by weight;
putting the mixed material of urea and humic acid powder into a reaction kettle, heating to 150-180 ℃, melting the mixed material, and continuously stirring in the melting process to obtain black urea liquid;
filtering the black urea liquid, spraying the filtered black urea liquid into an oil pool containing liquid paraffin by using a shower head, continuously stirring the liquid paraffin in the spraying process of the black urea liquid, controlling the temperature of the liquid paraffin to be not higher than 40 ℃, and coating the black urea liquid drops sprayed into the liquid paraffin by the liquid paraffin to prepare black urea particles;
screening and separating the black urea particles from the liquid paraffin, and then carrying out centrifugal separation on the separated black urea particles to remove the liquid paraffin attached to the surfaces of the black urea particles;
and step six, drying the centrifugally separated black urea particles for the second time, wherein the drying temperature is 60-80 ℃, and the drying time is controlled to be 5-10 min.
As an improvement of the technical scheme, the method further comprises a seventh step of standing the dried black urea particles, cooling to normal temperature, and then subpackaging.
In the fourth step, the volume ratio of the black urea liquid to the liquid paraffin is not less than 1: 20.
Due to the adoption of the technical scheme, the invention has the following beneficial effects: the formed black urea product only contains two components of humic acid and urea, and after processing, the exchange capacity of cations in soil can be effectively improved, the dissolution loss of the fertilizer is reduced, the utilization rate of the fertilizer is improved, the growth of beneficial flora in the soil can be promoted, the root system of crops grows more robustly, the loss of the fertilizer can be effectively reduced, and the consumption of the fertilizer can be reduced by about 25 percent compared with that of common urea through actual tests.
Drawings
The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein:
FIG. 1 is a process flow diagram of an embodiment of the invention.
Detailed Description
The invention is further illustrated below with reference to the figures and examples. In the following detailed description, certain exemplary embodiments of the present invention are described by way of illustration only. Needless to say, a person skilled in the art realizes that the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.
As shown in figure 1, the urea black containing humic acid consists of 0.1-10 wt% of humic acid and urea in balance. For example, the weight proportion of humic acid is 0.5 percent, and the weight proportion of urea is 99.5 percent; the humic acid is 3 percent by weight, and the urea is 97 percent by weight; the humic acid is 5 weight parts, the urea is 95 weight parts or the humic acid is 10 weight parts, and the urea is 90 weight parts. The humic acid can be mixed with the rest of urea in any percentage within the numerical range of 0.1-10% by weight.
The production method of urea containing humic acid in the embodiment comprises the following steps,
step one, heating and drying humic acid in parts by weight until the water content of the humic acid is below 8% for later use. The purpose of controlling the water content of the humic acid within the numerical range is to avoid excessive foam generation with urea in the melting process of the step three. Practical trial production proves that when the water content of the humic acid is controlled to be about 3%, the influence of the formed foam quantity on the production quality can be ignored, and the energy-saving effect in the production process is optimal.
And step two, crushing the dried humic acid to more than 80 meshes to prepare humic acid powder, and uniformly mixing the urea and the humic acid powder in parts by weight.
And step three, placing the mixed material of urea and humic acid powder into a reaction kettle, heating to 150-180 ℃, melting the mixed material, and continuously stirring in the melting process to obtain the black urea liquid. The humic acid powder is black in color and luster, and the liquid is also black after being mixed and melted with the urea, so that the black urea product is finally formed. The mixed materials can generate ammonia gas in the melting process, so that toxic-proof, explosion-proof and other facilities need to be arranged, and open fire is strictly forbidden to ensure the production safety.
And step four, filtering the black urea liquid, spraying the filtered black urea liquid into an oil pool containing liquid paraffin by using a shower head, continuously stirring the liquid paraffin in the spraying process of the black urea liquid, controlling the stirring speed to be adjusted according to the spraying speed of the black urea liquid, controlling the temperature of the liquid paraffin to be not higher than 40 ℃, and coating the black urea liquid drops sprayed into the liquid paraffin by the liquid paraffin to obtain the black urea particles. The liquid paraffin is continuously stirred, so that the black urea dropping liquid can be quickly separated from the liquid white wax, and the black urea dropping liquid sprayed in succession is prevented from being mutually adhered or piled up, thereby ensuring the independence of the formed black urea particles.
In the step, the volume ratio of the black urea liquid to the liquid paraffin is not less than 1: 20. The black urea liquid formed by melting is sprayed into the liquid paraffin and can be quickly wrapped by the liquid paraffin, and due to the incompatibility of the two and the large temperature difference, the melted black urea liquid can be quickly gathered and changed into a small ball shape, and the surface of the liquid paraffin is wrapped by the liquid paraffin to finally form black urea particles. The filtering jet pressure of the black urea liquid is constant, the specific pressure value can be selected within the pressure range of 0.01-0.1 MPa, and heat preservation facilities such as spray heads and pipelines of the black urea liquid are required to be made in the jet conveying facility, so that the black urea liquid is prevented from being solidified in the conveying process, and the black urea liquid is ensured to be smoothly and continuously jetted. The oil pool is specially provided with a circulating cooling system for reducing the heat brought by the black urea liquid, and the temperature of the liquid paraffin is controlled to be not higher than 40 ℃ through control.
Screening and separating the black urea particles and the liquid paraffin, wherein the equipment used for screening and separating generally adopts a screen, and the mesh of the screen is selected according to the size of granulation, and generally a 40-80-mesh screen is selected; and then carrying out centrifugal separation on the separated black urea particles to remove the liquid paraffin attached to the surfaces of the black urea particles. Specifically, a centrifugal roller or a centrifugal machine can be used for carrying out centrifugal separation on the black urea particles, in the centrifugal separation process, the centrifugal roller or the centrifugal machine is influenced by the amount of separated materials, the rotating speed and time of the centrifugal roller or the centrifugal machine are set, and the rotating speed and the time can be obtained according to experience or flexibly adjusted according to actual separation quality, for example, the rotating speed and the time are set to be 1000rmp, 10min or 3000rmp, 5min and the like, so that most of liquid paraffin adhered to the surfaces of the black urea particles can be removed. The liquid paraffin (white oil in the industry) has certain viscosity, so a large amount of white oil is adhered to the surfaces of black urea particles, the process is specially arranged, the content of the obtained black urea particles is not more than 1% after the process is carried out, the separated liquid white wax can be returned to an oil pool through precision filtration and recycled, and the cost is reduced.
And step six, drying the centrifugally separated black urea particles for the second time, wherein the drying temperature is 60-80 ℃, and the drying time is controlled to be 5-10 min. Partial white oil still adheres to the surfaces of the black urea particles after centrifugal separation, and residual oil adhering to the surfaces of the black urea particles can be volatilized by heating through hot air drying.
Step seven can also be arranged in the embodiment, the dried black urea particles are stood, cooled to normal temperature and then subpackaged to form finished products, and the finished products are convenient to store or transport.
The black urea product formed by the invention only contains two components of humic acid and urea, and after processing, the exchange capacity of cations in soil can be effectively improved, the dissolution loss of the fertilizer is reduced, the utilization rate of the fertilizer is improved, the growth of beneficial flora in the soil can be promoted, the root system of crops can grow more robustly, the loss of the fertilizer can be effectively reduced, and the consumption of the black urea product can be reduced by about 25 percent compared with the consumption of common urea through actual tests.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. A kind of black urea containing humic acid, characterized by that: the humic acid fertilizer consists of 0.1-10 wt% of humic acid and urea in balance.
2. A humic acid-containing melanoidin according to claim 1, wherein: the humic acid is 0.5 percent by weight, and the urea is 99.5 percent by weight.
3. A humic acid-containing melanoidin according to claim 1, wherein: the humic acid is 3 weight parts, and the urea is 97 weight parts.
4. A humic acid-containing melanoidin according to claim 1, wherein: the humic acid is 5 weight parts, and the urea is 95 weight parts.
5. A humic acid-containing melanoidin according to claim 1, wherein: the humic acid is 10 weight parts, and the urea is 90 weight parts.
6. The method for producing humic acid-containing urea black according to any one of claims 1 to 5, wherein: comprises the following steps of (a) carrying out,
step one, heating and drying humic acid in parts by weight until the water content of the humic acid is below 8% for later use;
step two, crushing the dried humic acid to more than 80 meshes to prepare humic acid powder, and uniformly mixing urea and the humic acid powder in parts by weight;
putting the mixed material of urea and humic acid powder into a reaction kettle, heating to 150-180 ℃, melting the mixed material, and continuously stirring in the melting process to obtain black urea liquid;
filtering the black urea liquid, spraying the filtered black urea liquid into an oil pool containing liquid paraffin by using a shower head, continuously stirring the liquid paraffin in the spraying process of the black urea liquid, controlling the temperature of the liquid paraffin to be not higher than 40 ℃, and coating the black urea liquid drops sprayed into the liquid paraffin by the liquid paraffin to prepare black urea particles;
screening and separating the black urea particles from the liquid paraffin, and then carrying out centrifugal separation on the separated black urea particles to remove the liquid paraffin attached to the surfaces of the black urea particles;
and step six, drying the centrifugally separated black urea particles for the second time, wherein the drying temperature is 60-80 ℃, and the drying time is controlled to be 5-10 min.
7. The method for producing urea black containing humic acid according to claim 6, wherein: and seventhly, standing the dried melanoidin particles, cooling to normal temperature, and subpackaging.
8. The method for producing urea black containing humic acid according to claim 6, wherein: in the fourth step, the volume ratio of the black urea liquid to the liquid paraffin is not less than 1: 20.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010026433.XA CN111153753A (en) | 2020-01-10 | 2020-01-10 | Hemicin containing humic acid and production method thereof |
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| CN202010026433.XA CN111153753A (en) | 2020-01-10 | 2020-01-10 | Hemicin containing humic acid and production method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102584498A (en) * | 2012-03-28 | 2012-07-18 | 中国农业科学院农业资源与农业区划研究所 | Humic acid urea and preparing method thereof |
| CN103073350A (en) * | 2013-01-10 | 2013-05-01 | 山西昌鑫生物农业科技有限公司 | Slow-release humic acid and urea compound fertilizer and preparation method thereof |
| CN107056432A (en) * | 2017-03-22 | 2017-08-18 | 新疆心连心能源化工有限公司 | Humic acid urea and preparation method thereof |
| CN107628861A (en) * | 2017-09-26 | 2018-01-26 | 安庆市望马楼生态农业发展有限公司 | A kind of special fertilizer for oil-tea camellia for improving yield |
| CN108395352A (en) * | 2018-02-08 | 2018-08-14 | 龙蟒大地农业有限公司 | A kind of humic acid urea and preparation method thereof and the composition for being used to prepare humic acid urea |
-
2020
- 2020-01-10 CN CN202010026433.XA patent/CN111153753A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102584498A (en) * | 2012-03-28 | 2012-07-18 | 中国农业科学院农业资源与农业区划研究所 | Humic acid urea and preparing method thereof |
| CN103073350A (en) * | 2013-01-10 | 2013-05-01 | 山西昌鑫生物农业科技有限公司 | Slow-release humic acid and urea compound fertilizer and preparation method thereof |
| CN107056432A (en) * | 2017-03-22 | 2017-08-18 | 新疆心连心能源化工有限公司 | Humic acid urea and preparation method thereof |
| CN107628861A (en) * | 2017-09-26 | 2018-01-26 | 安庆市望马楼生态农业发展有限公司 | A kind of special fertilizer for oil-tea camellia for improving yield |
| CN108395352A (en) * | 2018-02-08 | 2018-08-14 | 龙蟒大地农业有限公司 | A kind of humic acid urea and preparation method thereof and the composition for being used to prepare humic acid urea |
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Application publication date: 20200515 |