CN110577435A - high tower compound fertilizer containing lignin and calcium lignosulfonate and preparation method thereof - Google Patents
high tower compound fertilizer containing lignin and calcium lignosulfonate and preparation method thereof Download PDFInfo
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- CN110577435A CN110577435A CN201910802006.3A CN201910802006A CN110577435A CN 110577435 A CN110577435 A CN 110577435A CN 201910802006 A CN201910802006 A CN 201910802006A CN 110577435 A CN110577435 A CN 110577435A
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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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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
Abstract
The invention discloses a high-tower compound fertilizer containing lignin and calcium lignosulfonate, which comprises ammonium phosphate nitrate, potassium manham sulfate, instant lignin, calcium lignosulfonate, diammonium phosphate, monoammonium phosphate and anhydrous magnesium sulfate, wherein the instant lignin and the calcium lignosulfonate are small molecules, and the molecular weights of the instant lignin and the calcium lignosulfonate are 20-200 kDa; the small amount of micromolecule instant lignin and calcium lignosulfonate can be organically combined with high-concentration nutrient elements, the slow release function and the affinity are not influenced by high temperature, and the obtained compound fertilizer is sufficient in nutrients, rich in high-concentration quick-acting nutrient elements, high in activity, fully water-soluble, excellent in quick-acting and slow-release performance and the like, and is efficient and convenient. The invention also discloses a preparation method of the high-tower compound fertilizer containing lignin and calcium lignosulfonate, which optimizes the preparation process and parameters of the high-tower compound fertilizer, has good stability, is easy to granulate and form and has high activity of the effective components of the fertilizer.
Description
Technical Field
the invention relates to the technical field of high tower compound fertilizer production, in particular to a high tower compound fertilizer containing lignin and calcium lignosulfonate and a preparation method thereof.
Background
Lignin is a complex phenolic polymer formed from three alcohol monomers (p-coumaryl alcohol, coniferyl alcohol, sinapyl alcohol), and in woody plants, lignin accounts for 25%, the second most abundant organic matter in the world. The lignin is an environment-friendly biomass renewable resource, can improve the properties of the lignin by physical blending or chemical reaction modification such as sulfonation, hydroxymethylation, phenolation, hydrogenolysis, propoxylation, esterification, amination, graft copolymerization and the like, and is widely applied to the fields of industry and agriculture, building industry, mining industry and the like. The application of lignin and lignin compounds thereof to fertilizers began earlier in developed agricultural countries abroad, and people have new understanding on the importance of lignin along with the gradual deepening of the research of the lignin in the 20 th century.
The adsorption slow-release property of the lignin can better keep the effectiveness of the chemical fertilizer and enable the chemical fertilizer to be slowly released, and the lignin is a good organic compound fertilizer slow-release material. Lignin is a polycyclic high-molecular organic matter containing many electronegative groups, and has strong affinity for high-valence metal ions in soil. The lignin is used as a carrier of the fertilizer to adsorb or wrap the fertilizer, so that the aim of slow release of the fertilizer can be fulfilled. Because the lignin is a natural high molecular compound, the lignin is nontoxic and degradable, and can be degraded by microorganisms in soil to generate humic acid, thereby improving the physical and chemical properties of the soil, improving the permeability of the soil and preventing hardening. The lignin has large specific surface area and light weight, and is directly mixed with N, P, K and trace elements to prepare the lignin-based carrier compound fertilizer, because of the characteristic of slow release of the lignin, a plurality of nutrient elements contained in the lignin can better control leaching loss, and the fertilizer effect can last for 20 weeks. The lignin is a protective agent of the cationic fertilizer, can reduce leaching loss of the potassium fertilizer applied in the soil, and improves the utilization rate of the potassium fertilizer. Sulfonated kraft lignin, with Fe under certain conditions2+Carrying out complexation reaction to prepare a lignin Fe chelate, directly applying the lignin Fe chelate into soil, and supplying soluble Fe to plants to prevent Fe deficiency of the plants; the sulfonated lignin chelate fertilizer has high fertilizer effect and specific effect on crops, and can promote synthesis of chlorophyll and regulate oxidation and reduction in plant body when applied to cropsProcesses, promoting the growth of crops, and the like. The lignin carrier compound fertilizer is a novel fertilizer which is pollution-free, harmless and suitable for the requirements of modern agricultural production.
However, lignin recovered from paper pulp waste liquor is mostly adopted as an additive raw material in China at present, the lignin is a renewable resource through environment-friendly treatment, more active substances and special functions can be taken away by paper pulp raw stock, organic matters are about 60 percent generally, and the content of fulvic acid is about 35 percent; and the byproduct lignin in the domestic paper industry has strong sour taste and even sour odor, hydrochloric acid is mostly adopted for treatment in environmental protection, and the content of chloride ions is higher. Moreover, the slow release function of lignin and derivatives thereof used in China at present and the affinity with nitrogen, phosphorus and potassium substances are easy to change at high temperature, so that the preparation method is not beneficial to granulation molding of fertilizers and preparation of high-concentration nitrogen, phosphorus and potassium-lignin compound fertilizers.
disclosure of Invention
In order to overcome the defects of the prior art and fully utilize a plurality of benefits of lignin in agriculture, the invention aims to provide the high-tower compound fertilizer containing lignin and calcium lignosulfonate.
The second purpose of the invention is to provide a preparation method of the high-tower compound fertilizer containing lignin and calcium lignosulfonate, which optimizes the preparation process and parameters of the high-tower compound fertilizer, has good stability, is easy to granulate and form and has high activity of the effective components of the fertilizer.
One of the purposes of the invention is realized by adopting the following technical scheme:
A high tower compound fertilizer containing lignin and calcium lignosulfonate comprises the following components in parts by weight:
45-50 parts of ammonium nitrate phosphorus, 25-30 parts of potassium manhate sulfate, 0.5-1.5 parts of instant lignin and calcium lignosulfonate, 2-4 parts of diammonium phosphate, 18-22 parts of monoammonium phosphate and 0.3-0.7 part of anhydrous magnesium sulfate;
The molecular weight of the instant lignin and the calcium lignosulfonate is 20-200 kDa.
The micromolecule instant lignin and the calcium lignosulfonate are extracted from spruce, and are screened by an ultra-microfiltration process, and the micromolecule instant lignin and the calcium lignosulfonate are mainly characterized by being fast dissolved in water, completely dissolved within 5s and good in dispersibility; the calcium lignosulfonate is high-purity refined modified calcium lignosulfonate, does not contain chloride ions, has strong binding capacity on nutrient elements, can better keep the effectiveness of the fertilizer and enable the fertilizer to be slowly released, is favorable for improving the nutrient utilization rate of the fertilizer and can release fixed nutrients of soil; the fertilizer is very stable in physical properties, namely bonding and dispersion, and is favorable for granulation molding and water-entering disintegration of the fertilizer.
The instant lignin and calcium lignosulfonate raw material is softwood raw wood, can maintain lignin activity and specific functions to the maximum extent, has the organic matter content of over 80 percent, has the fulvic acid content of over 70 percent, retains the original wood nutrition to the maximum extent, and has the fragrance of natural wood.
Preferably, the high-tower compound fertilizer containing lignin and calcium lignosulfonate comprises the following components in parts by weight:
46.5 parts of ammonium nitrate phosphorus, 29 parts of potassium manhate sulfate, 1 part of instant lignin and calcium lignosulfonate, 3 parts of diammonium phosphate, 20 parts of monoammonium phosphate and 0.5 part of anhydrous magnesium sulfate.
further, the nitrogen content in the ammonium nitrate phosphorus is more than or equal to 32 percent, and the phosphorus content is more than or equal to 4 percent;
the potassium content in the potassium manhamate sulfate is more than or equal to 52 percent;
The content of nitrogen in the diammonium phosphate is more than or equal to 21 percent, and the content of phosphorus is more than or equal to 53 percent;
The nitrogen content in the monoammonium phosphate is more than or equal to 12 percent, and the phosphorus content is more than or equal to 60 percent;
The magnesium content in the anhydrous magnesium sulfate is more than or equal to 20 percent;
the content of organic matters in the instant lignin and the calcium lignosulphonate is more than or equal to 80 percent, wherein the content of fulvic acid is more than or equal to 70 percent.
The fertilizer is high in fertilizer efficiency by adopting fully water-soluble quick-acting nutrient elements. The nitrate ammonium state and the ammonium nitrogen are nitrogen elements which can be absorbed and utilized by plants through simple transformation, and the nitrogen source absorption speed is high; the phosphorus element is all high-efficiency water-soluble phosphorus, and 100 percent of the phosphorus element is dissolved in water and is an element which can be efficiently utilized; the potassium element is potassium sulfate prepared by adopting a Mannheim method, is 100 percent water-soluble and contains trace chloride ions required by crops; magnesium element in magnesium sulfate is an essential element for synthesizing plant chlorophyll, and anhydrous magnesium sulfate is adopted because the anhydrous magnesium sulfate can be better dissolved in water and absorbed and utilized by crops. The magnesium sulfate is usually magnesium sulfate heptahydrate, is waste material generated by industrial waste acid, and can generate adverse effect on soil applied by the waste acid because the magnesium sulfate is not easy to dissolve, and acid radical ions and toxic heavy metals carried by impurity acid in the industrial waste acid can be enriched in the soil and animals and plants and finally absorbed by human bodies.
the second purpose of the invention can be achieved by adopting the following technical scheme:
a preparation method of a high tower compound fertilizer containing lignin and calcium lignosulfonate comprises the following steps:
Three-stage high-temperature melting: adding the ammonium phosphate nitrate, the potassium sulfate manhami, the diammonium phosphate and the monoammonium phosphate into a primary tank according to the formula ratio for high-temperature melting and dissolving, and uniformly stirring; overflowing the uniformly stirred molten slurry at a constant speed into a secondary tank, adding anhydrous magnesium sulfate according to the formula amount, keeping the temperature, and uniformly stirring; guiding the molten slurry of the secondary tank into a tertiary tank at a constant speed for overflowing, adding instant lignin and calcium lignosulfonate according to the formula amount, keeping the temperature, stirring uniformly, and keeping the slurry at a constant speed for overflowing;
Homogenizing: guiding the overflow molten slurry uniformly stirred by the three-stage tank into an emulsifying pulping machine for emulsifying and shearing;
High tower granulation: introducing the uniformly emulsified slurry into a granulator, and pressurizing and spraying out for granulation;
cooling and screening: primary screening is carried out on particles obtained after high tower granulation after primary cooling, particles which are out of specification return to a secondary tank, and particles which are in accordance with specification are guided into a secondary cooling heat exchanger for secondary cooling; secondary screening is carried out on the particles after secondary cooling, and the particles which do not meet the specification return to a secondary tank;
Coating and packaging: and (3) feeding the granules which are secondarily screened to meet the specification into a coating conditioning cylinder, compressing and simultaneously carrying out plate binder atomization spraying, uniformly mixing to obtain a finished product of the compound fertilizer granules, metering and packaging, and warehousing.
Further, the temperature in the primary tank is 160-170 ℃;
The temperature in the secondary tank is 150-160 ℃;
The temperature in the three-stage tank was 145-155 ℃.
Preferably, the temperature in the primary tank is 165 ℃; the temperature in the secondary tank is 158 ℃; the temperature in the tertiary tank was 150 ℃.
Further, the temperature in the emulsification refiner is 135-145 ℃, and the rotating speed of the emulsification refiner is 1300-1500 r/min.
preferably, the temperature in the emulsifying refiner is 140 ℃, and the rotating speed of the emulsifying refiner is 1400 r/min.
the temperature in the granulator was 135-145 ℃.
the particle size of the high tower compound fertilizer containing lignin and calcium lignosulfonate is 0.2-2 mm.
Compared with the prior art, the invention has the beneficial effects that:
1. The fertilizer adopts micromolecule instant lignin and calcium lignosulfonate, can be dissolved in water quickly, can be dissolved completely within 5s, has good dispersibility and high activity, has strong binding capacity to nutrient elements, can combine high-concentration nutrient elements by a small amount of lignin and calcium lignosulfonate, can well maintain the effectiveness of the fertilizer and enable the fertilizer to be released slowly, is favorable for improving the utilization rate of fertilizer nutrients, and can release the fixed nutrients of soil; the fertilizer has stable cohesiveness and dispersivity in physical properties, is beneficial to granulation molding and water disintegration of the fertilizer, overcomes the problem of organic combination of lignin, calcium lignosulfonate and high-concentration nitrogen, phosphorus and potassium, keeps the slow release function and the affinity with nitrogen, phosphorus and potassium substances unchanged at high temperature, and has obvious difference from lignin which is a byproduct in domestic paper making industry.
2. The product of the invention contains high-concentration water solubilityInorganic nutrients of nitrogen, phosphorus and potassium, high-activity and slow-release instant lignin and organic nutrients of calcium lignosulphonate, and particularly medium and trace elements are added; the fertilizer has sufficient and efficient nutrients, ensures quick and long-acting effect of the fertilizer in the using process, greatly reduces the loss of the fertilizer, has excellent barren soil resistance and high nutrient conversion rate, promotes the growth of crops, increases the yield and has excellent quality improving effect. Wherein N-P2O5-K2The content of O is 45-57%, the trace elements are more than or equal to 1 per mill, and the content of instant lignin and calcium lignosulphonate is more than or equal to 1%.
3. The product disclosed by the invention is fully water-soluble, has excellent quick-acting and slow-release performances, is efficient and convenient, can be used by any method, is not limited by drip irrigation, spray irrigation and broadcasting, expands the use range and is a novel fertilizer with higher economic value and specific gravity.
4. The invention further optimizes the preparation process and parameters of the high-tower compound fertilizer, has good stability, easy granulation and molding and high activity of the effective components of the fertilizer.
drawings
FIG. 1 is a flow chart of a preparation process of a high-tower compound fertilizer containing lignin and calcium lignosulfonate.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.
example 1
The high tower compound fertilizer containing lignin and calcium lignosulfonate has the following formula:
46.5 parts of 36% ammonium phosphate nitrate, 29 parts of 52% potassium manhamate sulfate, 1 part of instant lignin and calcium lignosulfonate, 3 parts of 74% diammonium phosphate, 20 parts of 72% monoammonium phosphate and 0.5 part of 20% anhydrous magnesium sulfate.
the ammonium phosphate nitrate is N32-P4 and is purchased from the market;
Potassium manhamm sulfate K52, CI less than 3%, obtained from market purchase;
The diammonium phosphate is N21-P53 and is purchased from the market;
the monoammonium phosphate is N12-P60 and is obtained by market purchase;
magnesium sulfate is Mg20, and is purchased from the market;
the content of organic matters in the instant lignin and the calcium lignosulphonate is more than or equal to 80 percent, wherein the content of fulvic acid is more than or equal to 70 percent.
The instant lignin and calcium lignosulfonate are small-molecular instant lignin and calcium lignosulfonate provided by Borreaard AS (Boliger GmbH), have molecular weight of 20-200 kDa, and can be completely dissolved within 5 s.
The embodiment comprises quick-acting nutrients and slow-acting nutrients combined by lignin and calcium lignosulfonate, wherein the slow-acting nutrients are slowly released along with the degradation of the lignin, so that leaching loss of various nutrient elements contained in the slow-acting nutrients can be well controlled, the quick-acting property and the long-acting property of a product in the using process are ensured, the efficient utilization of a fertilizer is ensured, the loss of the fertilizer is greatly reduced, and the pressure on the environment and soil is reduced.
The instant lignin and calcium lignosulfonate are degraded by soil microorganisms to form free humic acid, protect soil, increase acid and alkali resistance of soil, promote change of soil shape, break soil hardening, promote formation of granular structures, increase cation exchange capacity of soil, resist continuous cropping and resist soil-borne diseases. Particularly, the guaiacyl lignin in the lignin has stronger prevention effect on bacterial diseases. The fertilizer of the embodiment can reduce the activity of urease, reduce the fixation of soil to phosphorus, improve the utilization efficiency of the fertilizer and reduce the influence on the ecological environment caused by the application of conventional fertilizers. By utilizing the chelating characteristics of the instant lignin and the calcium lignosulfonate, active metal ions in the soil can be chelated and replaced, the effective nutrient element structure in the soil is obviously improved, and the physiological diseases of crops are prevented.
the preparation method of the high-tower compound fertilizer containing lignin and calcium lignosulfonate, as shown in figure 1, comprises the following steps:
(1) Raw material metering: 46.5 parts of required 36% ammonium phosphate nitrate, 29 parts of required 52% potassium manhamate sulfate, 3 parts of required 74% diammonium phosphate and 20 parts of required 72% monoammonium phosphate are added and lifted to a primary tank according to the specific gravity.
(2) three-stage high-temperature melting and stirring: raising the temperature of the primary tank to 165 ℃, ensuring that the raw materials are completely dissolved into slurry, and uniformly stirring; guiding the uniformly stirred molten slurry overflow into a secondary tank, adding 0.5 part of anhydrous magnesium sulfate with the content of 20%, keeping the temperature at 158 ℃, ensuring the uniform flow rate and smoothness of the slurry, and uniformly stirring; and (3) guiding the molten slurry overflow of the second-stage reaction tank into a third-stage tank, adding instant lignin and calcium lignosulfonate, keeping the temperature at 150 ℃, continuously stirring, and keeping the slurry overflow at a constant speed.
When the temperature of the tertiary tank is kept at 150 ℃, the slurry can be kept to have good fluidity, so that the instant lignin and the calcium lignosulfonate can be uniformly distributed in the slurry, and the original physicochemical properties can be kept.
(3) High-speed emulsification, shearing and homogenization: and (3) guiding the overflow molten slurry uniformly stirred in the third-stage tank into an emulsifying pulping machine for high-speed emulsifying shearing, keeping 1400 revolutions per minute to further uniformly melt the slurry, and keeping the temperature at 140 ℃.
(4) and (3) granulation: keeping the temperature of the uniformly emulsified slurry and the granulator to be the same, introducing the slurry into the granulator, and pressurizing and spraying out for granulation.
(5) And (3) cooling: collecting the particles evaporated from the high-altitude free falling body, and feeding the particles into a cooling barrel for primary cooling.
(6) Screening: and screening the primary cooled particles, and returning the particles which do not meet the specification to the secondary reaction tank.
(7) Secondary cooling: and (4) guiding the granules subjected to primary cooling screening into a secondary cooling heat exchanger for secondary cooling.
(8) Secondary screening: and screening the granules cooled for the second time, and returning the granules which do not meet the specification to the secondary reaction tank.
(9) coating: and (3) metering the anti-caking agent fluid by the cooled and screened particles through a mass flow meter, simultaneously feeding the particles into the annular baffle of the coating conditioning cylinder, and carrying out atomization spraying through compressed air to uniformly mix the particles.
(10) Metering and packaging: and (5) automatically metering and packaging the finished product by using a finished product packaging scale.
(11) And (6) warehousing the finished product.
The high tower compound fertilizer N-P containing lignin and calcium lignosulfonate of the embodiment2O5-K2more than or equal to 48 percent of O, more than or equal to 1 per thousand of trace elements, more than or equal to 1 percent of instant lignin and calcium lignosulphonate, and the particle size of the high-tower compound fertilizer is 0.2-2 mm.
The effect of the high-tower compound fertilizer containing lignin and calcium lignosulfonate of the embodiment is verified as follows:
The high-tower compound fertilizer containing lignin and calcium lignosulfonate prepared in the embodiment is used for planting different crops in different regions, and the conditions of yield increase, diseases and commodity rate of the high-tower compound fertilizer relative to conventional fertilization are recorded, and are specifically shown in the following table 1:
TABLE 1 different areas and conditions of crop fertilization treatments
| Serial number | Region of land | Crops | yield increase/%) | Disease reduction Rate/%) | Percentage of commodity/%) | Increase in rate of commodity/%) |
| process 1 | Guangdong officer kiln town | Balsam pear | 16.5 | 45 | 98 | 5 |
| Treatment 2 | Yellow rock of Zhejiang river | Watermelon | 12.4 | 31 | 99 | 6 |
| Treatment 3 | shandong Zhongmuui county | Ginger (ginger) | 13.2 | 35 | 97 | 8 |
| Treatment 4 | hebei le Ting county | peach tree | 15 | 40 | 95 | 10 |
| Treatment 5 | Yunnan Kunming | passion fruit | 35 | 30 | 93 | 6 |
| treatment 6 | General theory of cloud | Grape | 17 | 23 | 93 | 4 |
The experimental crops show the characteristics of dark green, wide and thick leaves, the improvement of disease resistance and the enhancement of growth vigor in different degrees, and the characteristics of yield increase, bright color, dry matter increase, early maturity and natural flavor are uniformly shown. The sugar content of Huangjiang yellow watermelons is increased by 1.5%, the color of ginger in Shandong Zhoumu county is golden yellow, peach in Hebei Leting county appears 5 days earlier, passion fruits of Yunnan Kunming realize no off season in the whole year, grapes in Yunnan Dali are colored 7 days earlier, and the sugar content is increased by 2%.
As can be seen from the table 1, the compound fertilizer of the embodiment can be suitable for the soil conditions and various crops such as melons, fruits and the like all over the country, and the yield of the Yunnan passion fruit is the highest and can reach 35%; the disease reduction rate of each region and crop is more than 23 percent, and the disease reduction rate of balsam pear in Guangdong officinal town is the highest and can reach 45 percent; the commodity rate of crops is also improved better.
Example 2
The high tower compound fertilizer containing lignin and calcium lignosulfonate has the following formula:
50 parts of 36% ammonium phosphate nitrate, 30 parts of 52% potassium manhamate sulfate, 0.5 part of instant lignin and calcium lignosulfonate, 4 parts of 74% diammonium phosphate, 15 parts of 72% monoammonium phosphate and 0.5 part of 20% anhydrous magnesium sulfate.
the preparation method of the high-tower compound fertilizer containing lignin and calcium lignosulfonate is as in example 1 and is not described in detail herein.
in the high-tower compound fertilizer containing lignin and calcium lignosulfonate of the embodiment: N-P2O5-K2O≥57％。
example 3
the high tower compound fertilizer containing lignin and calcium lignosulfonate has the following formula:
46.5 parts of 36% ammonium phosphate nitrate, 29 parts of 52% potassium manham sulfate, 1.4 parts of instant lignin and calcium lignosulfonate, 3 parts of 74% diammonium phosphate, 20 parts of 72% monoammonium phosphate and 0.1 part of 20% anhydrous magnesium sulfate.
the preparation method of the high-tower compound fertilizer containing lignin and calcium lignosulfonate is as in example 1 and is not described in detail herein.
Comparative example 1
The high tower compound fertilizer containing lignin and calcium lignosulfonate has the following formula:
46.5 parts of 36% ammonium phosphate nitrate, 29 parts of 52% potassium manhamate sulfate, 1 part of lignin and calcium lignosulfonate, 3 parts of 74% diammonium phosphate, 20 parts of 72% monoammonium phosphate and 0.5 part of anhydrous magnesium sulfate with the content of 20%.
Wherein, the lignin and the calcium lignosulphonate are common lignin and calcium lignosulphonate in the market.
The preparation method of the high-tower compound fertilizer containing lignin and calcium lignosulfonate is as in example 1 and is not described in detail herein.
And (3) detecting the performance of the high-tower compound fertilizer containing lignin and calcium lignosulfonate:
The slow release nitrogen of the high tower compound fertilizers of examples 1-3 and comparative example 1 was tested according to AOAC970.04 (1990). The results of the water leaching method, which was performed after the fertilizer was soaked in deionized water at a ratio of 1:20 at room temperature for 8 hours, were shown in table 2.
Table 2 slow-release nitrogen detection of high-tower compound fertilizer in examples 1-3 and comparative example 1
In the compound fertilizer, the slow release compound fertilizer is obtained when the content of undissolved nitrogen exceeds 2 percent. As can be seen from Table 2, in comparative example 1, when only 1 part of common lignin and calcium lignosulfonate in the market is added, the content of undissolved nitrogen is only 0.8%, the slow release effect is not achieved, and the standard of the slow release fertilizer can be achieved only by a large amount of lignin and derivatives thereof. In examples 1-3, the amounts of the added instant lignin and calcium lignosulfonate were 1 part, 0.5 part and 1.4 parts, respectively, and the corresponding undissolved nitrogen contents were all greater than 2%, which met the standards for slow-release compound fertilizers. And as can be seen from comparison of examples 1-3, the content of undissolved nitrogen gradually increases with the increase of the instant lignin and the calcium lignosulfonate, that is, the content of the slow-release compound fertilizer increases. The proportion of the high-tower compound fertilizer containing lignin and calcium lignosulfonate can be determined according to the needs by comprehensively considering the quick-acting components and the slow-release components of the compound fertilizer and the nutrients of the lignin and the calcium lignosulfonate.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (10)
1. A high tower compound fertilizer containing lignin and calcium lignosulfonate is characterized by comprising the following components in parts by weight:
45-50 parts of ammonium nitrate phosphorus, 25-30 parts of potassium manhate sulfate, 0.5-1.5 parts of instant lignin and calcium lignosulfonate, 2-4 parts of diammonium phosphate, 18-22 parts of monoammonium phosphate and 0.3-0.7 part of anhydrous magnesium sulfate;
The molecular weight of the instant lignin and the calcium lignosulfonate is 20-200 kDa.
2. The high tower compound fertilizer containing lignin and calcium lignosulfonate according to claim 1, comprising the following components in parts by weight:
46.5 parts of ammonium nitrate phosphorus, 29 parts of potassium manhate sulfate, 1 part of instant lignin and calcium lignosulfonate, 3 parts of diammonium phosphate, 20 parts of monoammonium phosphate and 0.5 part of anhydrous magnesium sulfate.
3. The high tower compound fertilizer containing lignin and calcium lignosulfonate according to claim 1,
The nitrogen content in the ammonium nitrate phosphorus is more than or equal to 32 percent, and the phosphorus content is more than or equal to 4 percent;
The potassium content in the potassium manhamate sulfate is more than or equal to 52 percent;
The content of nitrogen in the diammonium phosphate is more than or equal to 21 percent, and the content of phosphorus is more than or equal to 53 percent;
The nitrogen content in the monoammonium phosphate is more than or equal to 12 percent, and the phosphorus content is more than or equal to 60 percent;
The magnesium content in the anhydrous magnesium sulfate is more than or equal to 20 percent;
the content of organic matters in the instant lignin and the calcium lignosulphonate is more than or equal to 80 percent, wherein the content of fulvic acid is more than or equal to 70 percent.
4. a method for preparing a high tower compound fertilizer containing lignin and calcium lignosulfonate according to any one of claims 1 to 3, comprising:
Three-stage high-temperature melting: adding the ammonium phosphate nitrate, the potassium sulfate manhami, the diammonium phosphate and the monoammonium phosphate into a primary tank according to the formula ratio for high-temperature melting and dissolving, and uniformly stirring; overflowing the uniformly stirred molten slurry at a constant speed into a secondary tank, adding anhydrous magnesium sulfate according to the formula amount, keeping the temperature, and uniformly stirring; guiding the molten slurry of the secondary tank into a tertiary tank at a constant speed for overflowing, adding instant lignin and calcium lignosulfonate according to the formula amount, keeping the temperature, stirring uniformly, and keeping the slurry at a constant speed for overflowing;
Homogenizing: guiding the overflow molten slurry uniformly stirred by the three-stage tank into an emulsifying pulping machine for emulsifying and shearing;
High tower granulation: introducing the uniformly emulsified slurry into a granulator, and pressurizing and spraying out for granulation;
Cooling and screening: primary screening is carried out on particles obtained after high tower granulation after primary cooling, particles which are out of specification return to a secondary tank, and particles which are in accordance with specification are guided into a secondary cooling heat exchanger for secondary cooling; secondary screening is carried out on the particles after secondary cooling, and the particles which do not meet the specification return to a secondary tank;
coating and packaging: and (3) feeding the granules which are secondarily screened to meet the specification into a coating conditioning cylinder, compressing and simultaneously carrying out plate binder atomization spraying, uniformly mixing to obtain a finished product of the compound fertilizer granules, metering and packaging, and warehousing.
5. the method for preparing the high-tower compound fertilizer containing lignin and calcium lignosulfonate according to claim 4, wherein the temperature in the primary tank is 160-170 ℃; the temperature in the secondary tank is 150-160 ℃; the temperature in the three-stage tank was 145-155 ℃.
6. The method for preparing a high-tower compound fertilizer containing lignin and calcium lignosulfonate according to claim 5, wherein the temperature in the primary tank is 165 ℃; the temperature in the secondary tank is 158 ℃; the temperature in the tertiary tank was 150 ℃.
7. The method for preparing high-tower compound fertilizer containing lignin and calcium lignosulfonate according to claim 4, wherein the temperature in the emulsifying refiner is 135-145 ℃, and the rotating speed of the emulsifying refiner is 1300-1500 r/min.
8. The method for preparing high-tower compound fertilizer containing lignin and calcium lignosulfonate according to claim 7, wherein the temperature in the emulsifying refiner is 140 ℃, and the rotating speed of the emulsifying refiner is 1400 r/min.
9. The method for preparing the high-tower compound fertilizer containing lignin and calcium lignosulfonate according to claim 4, wherein the temperature in the granulator is 135-145 ℃.
10. the method for preparing the high-tower compound fertilizer containing lignin and calcium lignosulfonate according to claim 4, wherein the grain diameter of the high-tower compound fertilizer containing lignin and calcium lignosulfonate is 0.2-2 mm.
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| CN (1) | CN110577435A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111960881A (en) * | 2020-07-08 | 2020-11-20 | 挪威鲍利葛特种肥股份有限公司 | High-utilization-rate and instant complex compound fertilizer and production process thereof |
| CN113105286A (en) * | 2021-03-31 | 2021-07-13 | 广东凯米瑞特肥科技有限公司 | Preparation method of coated fertilizer with longer nutrition effect and coated fertilizer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1334997A1 (en) * | 2002-02-11 | 2003-08-13 | Borregaard Industries Ltd. Borregaard Lignotech | Method for the production of a compound material and compound material comprising lignin |
| CN102030592A (en) * | 2010-11-10 | 2011-04-27 | 张超 | Tower-granulated low-nitrogen high-phosphorus urine sulfur radical compound fertilizer and preparation method thereof |
| CN109851427A (en) * | 2019-02-25 | 2019-06-07 | 深圳市芭田生态工程股份有限公司 | It is sustained the composite organic-inorganic fertilizer and preparation method thereof that loosens the soil |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1334997A1 (en) * | 2002-02-11 | 2003-08-13 | Borregaard Industries Ltd. Borregaard Lignotech | Method for the production of a compound material and compound material comprising lignin |
| CN102030592A (en) * | 2010-11-10 | 2011-04-27 | 张超 | Tower-granulated low-nitrogen high-phosphorus urine sulfur radical compound fertilizer and preparation method thereof |
| CN109851427A (en) * | 2019-02-25 | 2019-06-07 | 深圳市芭田生态工程股份有限公司 | It is sustained the composite organic-inorganic fertilizer and preparation method thereof that loosens the soil |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111960881A (en) * | 2020-07-08 | 2020-11-20 | 挪威鲍利葛特种肥股份有限公司 | High-utilization-rate and instant complex compound fertilizer and production process thereof |
| CN113105286A (en) * | 2021-03-31 | 2021-07-13 | 广东凯米瑞特肥科技有限公司 | Preparation method of coated fertilizer with longer nutrition effect and coated fertilizer |
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