CN113620750A - Large-particle fertilizer and production process thereof - Google Patents
Large-particle fertilizer and production process thereof Download PDFInfo
- Publication number
- CN113620750A CN113620750A CN202111022994.3A CN202111022994A CN113620750A CN 113620750 A CN113620750 A CN 113620750A CN 202111022994 A CN202111022994 A CN 202111022994A CN 113620750 A CN113620750 A CN 113620750A
- Authority
- CN
- China
- Prior art keywords
- fertilizer
- urea
- drying
- parts
- raw materials
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
-
- 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
- C05G3/40—Mixtures of one or more fertilisers with additives not having a specially fertilising activity for affecting fertiliser dosage or release rate; for affecting solubility
-
- 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
- C05G3/80—Soil conditioners
-
- 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
- C05G5/00—Fertilisers characterised by their form
- C05G5/10—Solid or semi-solid fertilisers, e.g. powders
- C05G5/12—Granules or flakes
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Pest Control & Pesticides (AREA)
- Soil Sciences (AREA)
- Fertilizers (AREA)
Abstract
The invention provides a large-grained fertilizer and a production process thereof, the large-grained fertilizer comprises urea, potassium chloride, monoammonium phosphate, a trace element synergist, a reinforcing agent ingredient and a compound additive, and the large-grained fertilizer of aquatic series is produced by adopting a conventional drum guniting steam granulation process: the urea and the auxiliary agent enter a dissolving tank, the concentration of slurry is controlled to be about 93 percent, the temperature is kept at 100-115 ℃, the slurry is sprayed in a molten state and enters a granulator, after the slurry is mixed with other NPK raw materials, the mixture is rolled into large particles of 6-8mm under the assistance of steam, the particle size is uniform, and 1 percent of slow release agent is added, so that the large particle fertilizer can be rapidly settled into sludge in the using process of a pond, the dissolving and dissolving phenomena cannot occur in the settling process, the loss of the large particle fertilizer in the falling process of a water body is reduced, and the utilization rate of the fertilizer is improved; the product has slow dissolving and releasing speed, has slow release effect and improves the utilization rate of the fertilizer by more than 10 percent; meanwhile, the eutrophication of the water body can be reduced.
Description
Technical Field
The invention relates to the technical field of chemical fertilizers and preparation methods thereof, in particular to a large-particle fertilizer and a production process thereof.
Background
The fertilizer is a substance which provides one or more nutrient elements necessary for plants, improves the soil property and improves the soil fertility level, and is one of the material bases of agricultural production. Mainly comprises ammonium phosphate fertilizer, macroelement water-soluble fertilizer, secondary element fertilizer, biological fertilizer, organic fertilizer, multi-dimensional field energy concentrated organic fertilizer and the like; a compound fertilizer is produced by a drum granulation process, materials are mixed together by steam or slurry according to the viscosity of the materials to form particles, and the particles are dried, screened and packaged to obtain a product; the particle size of the granular fertilizer in the current market is generally 2.00-4.75mm, no large-particle special fertilizer product suitable for aquatic series exists in the market, and the conventional small granular fertilizer in the current market has the following disadvantages in pond crops: the traditional fertilizer has small particles and high water melting speed, so that a large amount of fertilizer is really absorbed by crops with water loss by less than 40 percent, and water eutrophication is also caused; the traditional fertilizer must be divided into a plurality of times to be applied, which is labor-consuming and laborious.
In the prior art, water-soluble fertilizer is small in grain size, is easy to harden due to dampness, and when the water-soluble fertilizer is used, the process of sinking is too long, and the phenomena of rapid dissolution and dissolution can occur in the process, so that most of fertilizer is dissolved and lost in water when the fertilizer does not reach the underwater sludge for playing a role, the utilization rate of the fertilizer is extremely low, water eutrophication is easy to cause, and therefore a new large-grain-size fertilizer is urgently needed to solve the defects and the defects in the prior art.
Disclosure of Invention
Aiming at the defects in the technology, the invention provides a large-grained fertilizer and a production process thereof, wherein the large-grained fertilizer is produced into a water-based series by adopting a conventional rotary drum guniting steam granulation process: the urea and the auxiliary agent enter a dissolving tank, the concentration of slurry is controlled to be about 93 percent, the temperature is kept at 100-115 ℃, the slurry is sprayed in a molten state and enters a granulator, after being mixed with other NPK raw materials, the mixture is agglomerated and rolled into large particles of 6-8mm under the assistance of steam, the particle size is uniform, and 1 percent of slow release agent is added, so that the product is slow in dissolving and releasing speed, has a slow release effect, and the utilization rate of the fertilizer is improved by over 10 percent; meanwhile, the eutrophication of the water body can be reduced.
In order to achieve the above objects, the present invention provides a macro-granular fertilizer, which comprises an inorganic material containing urea, potassium chloride and monoammonium phosphate and a synergist containing trace elements, wherein the inorganic material and the synergist are mixed with an enhancer ingredient and a compound additive to form a synergistic fertilizer, and the synergistic fertilizer is processed into macro-granular pellets with a particle size of 6mm-8 mm.
Specifically, the method comprises the following steps: the adhesive comprises the following components in parts by weight:
urea: 15-35 parts;
potassium chloride: 10-35 parts;
monoammonium phosphate: 10-35 parts;
trace element synergist: 1 part;
and (3) preparing an enhancer: 10-15 parts;
compound additive: 5-10 parts;
the production process of the large-particle fertilizer adopts the material proportion and comprises the following preparation steps:
weighing the ingredients: weighing urea, potassium chloride, monoammonium phosphate, trace element synergist, reinforcing agent ingredient and compound additive according to a formula respectively and preparing;
production and feeding: crushing all urea and an auxiliary agent, mixing, adding the crushed urea and the auxiliary agent into a melting tank, melting to form molten urea slurry, mixing potassium chloride, monoammonium phosphate, a trace element synergist, a reinforcing agent ingredient, a composite additive and the urea slurry into raw materials, and then sending the raw materials to a granulation step;
and (3) granulation: granulating the mixed raw materials by adopting a drum granulation process;
drying: and (3) conveying the particles obtained in the granulation step into a drying barrel with the inlet temperature of 330-370 ℃, the outlet temperature of 35-45 ℃ and the air pressure of 380-.
Screening and packaging: and (3) feeding the dried particles into a bucket elevator, conveying the particles into a screening machine for screening to obtain particles with the particle size of 6-8mm, conveying the particles into a dusting barrel, spraying anti-caking powder with the concentration of 0.5% for dusting, and packaging to obtain a finished product after finishing dusting.
Specifically, the method comprises the following steps: in the step of weighing the ingredients, the raw materials without hardening are selected from all the ingredients, and if hardening exists, the raw materials are sent to a crusher to be crushed into powder for preparation.
Preferably, the method comprises the following steps: in the step of producing the feeding materials, the temperature of a melting tank is controlled to be between 100 ℃ and 115 ℃, and the concentration of the urea slurry is controlled to be between 93 percent and 95 percent.
Preferably, the method comprises the following steps: in the step of feeding production, the adhesive is diluted by water and then added until the concentration is 15-18%.
Preferably, the method comprises the following steps: in the granulation step, a speed sensor is arranged to detect the blanking speed of the raw material, the control end calculates the dosage of the gunite in combination with the blanking speed, and meanwhile, the control end carries out steam-assisted granulation according to the particle granulation condition and the dry and wet condition.
Preferably, the method comprises the following steps: in the drying step, after the cooling drum finishes cooling, the cooling drum is sent to a second cooling drum for secondary cooling, and the air pressure of the second cooling drum is 300-400 Pa.
Preferably, the method comprises the following steps: in the drying step, a temperature sensor and a humidity sensor are arranged at the outlet of the drying cylinder, and the control end finely adjusts the outlet temperature and the inlet temperature of the drying cylinder according to data returned by the temperature sensor and the humidity sensor.
Preferably, the method comprises the following steps: in the drying step, a hot blast stove is adopted to generate heat, and hot air is formed by a jet induced draft fan and is introduced into a drying cylinder for drying; and the hot air of the drying barrel is connected to the dust falling pool for dust falling and then discharged through a chimney.
The invention has the beneficial effects that: compared with the prior art, the large-grained fertilizer and the production process thereof provided by the invention comprise urea, potassium chloride, monoammonium phosphate, a trace element synergist, a reinforcing agent ingredient and a compound additive, and the large-grained fertilizer of aquatic series is produced by adopting a conventional drum guniting steam granulation process: the urea and the auxiliary agent enter a dissolving tank, the concentration of slurry is controlled to be about 93 percent, the temperature is kept at 100-115 ℃, the slurry is sprayed in a molten state and enters a granulator, after the slurry is mixed with other NPK raw materials, the mixture is rolled into large particles of 6-8mm under the assistance of steam, the particle size is uniform, and 1 percent of slow release agent is added, so that the large particle fertilizer can be rapidly settled into sludge in the using process of a pond, the dissolving and dissolving phenomena cannot occur in the settling process, the loss of the large particle fertilizer in the falling process of a water body is reduced, and the utilization rate of the fertilizer is improved; the product has slow dissolving and releasing speed, has slow release effect and improves the utilization rate of the fertilizer by more than 10 percent; meanwhile, the eutrophication of the water body can be reduced.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "suspended", and the like do not imply that the components are required to be absolutely horizontal or suspended, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In order to more clearly describe the present invention, the present invention will be further described with reference to the accompanying drawings.
In the prior art, water-soluble fertilizer is easy to harden due to small grain size of fertilizer, and when the fertilizer is used, the process of sinking is too long, and the phenomena of quick dissolution and dissolution can occur in the process, so that most of fertilizer is dissolved and lost in water when the fertilizer does not reach underwater sludge for playing a role, the utilization rate of the fertilizer is extremely low, water eutrophication is easy to cause, and the conventional small-particle fertilizer in the current market has the following defects in pond crops: 1. the traditional fertilizer has small particles and high water melting speed, so that a large amount of fertilizer is really absorbed by crops with water loss by less than 40 percent, and water eutrophication is also caused; 2. the traditional fertilizer must be divided into a plurality of times to be applied, which wastes labor and time; therefore, a new fertilizer with large particle size is needed to solve the defects and shortcomings in the prior art.
In order to solve the defects and shortcomings of the prior art, the invention specifically provides a large-granule fertilizer and a production process thereof, and referring to fig. 1, the large-granule fertilizer comprises an inorganic material containing urea, potassium chloride and monoammonium phosphate and a synergist containing trace elements, wherein the inorganic material and the synergist are mixed with an enhancer ingredient and a compound additive to form a synergistic fertilizer, and the synergistic fertilizer is processed into large-granule pellets with the particle size of 6mm-8 mm.
The adhesive comprises the following components in parts by weight:
urea: 15-35 parts;
potassium chloride: 10-35 parts;
monoammonium phosphate: 10-35 parts;
trace element synergist: 1 part;
and (3) preparing an enhancer: 10-15 parts;
compound additive: 5-10 parts;
the processed pellet with the particle size of 6mm-8 mm.
In one example of an already implemented implementation,
urea: 30 parts of (1);
potassium chloride: 30 parts of (1);
monoammonium phosphate: 30 parts of (1);
trace element synergist: 1 part;
and (3) preparing an enhancer: 12 parts of (1);
compound additive: 8 parts of a mixture;
the trace element synergist is preferably prepared from the following raw materials: 10 parts of kaolinite, 4 parts of medical stone powder, 25 parts of rice hull, 4 parts of fish washing water, 14 parts of turfy soil, 4 parts of calcium carbonate powder, 2 parts of zinc sulfate heptahydrate, 17 parts of tobacco residue, 19 parts of fresh orange peel, 11 parts of earthworm, 85 parts of fresh pig manure, 9 parts of papermaking black liquor, 7 parts of fresh leaf of amur ampelopsis fruit, 4 parts of EM composite microbial inoculum and a proper amount of water; the earthworms can absorb organic matters in the pig manure, decompose and convert the organic matters into simpler compounds such as amino acid, polyphenol and the like, and condense the compounds to form humus under the action of various biological enzymes, so that the earthworm powder has a good improvement effect on soil, and meanwhile, the absorption capacity of plants on fertilizers is improved by utilizing various functional groups in the earthworm powder; the fresh leaves of the sour vine fruits can activate heavy metals in soil by using organic acid with higher concentration in leaf juice, and simultaneously can be used as a chelating agent to convert nutrients into a state which is easy to absorb by plants, and the method has the advantages of low cost and environmental friendliness; the mixing and calcining of the papermaking black liquor and the kaolinite increases the specific surface area of the outer layer of the synergist, increases the content of nutrients such as cellulose and the like, and has stronger water absorption and retention effects.
The production process of the large-particle fertilizer adopts the material proportion and comprises the following preparation steps:
weighing the ingredients: weighing urea, potassium chloride, monoammonium phosphate, trace element synergist, reinforcing agent ingredient and compound additive according to a formula respectively and preparing; the urea, the potassium chloride, the monoammonium phosphate, the trace element synergist, the reinforcing agent ingredient and the compound additive are respectively taken according to the formula: 15-35 parts of urea (46-0-0), 10-35 parts of potassium chloride (0-0-62), 10-35 parts of monoammonium phosphate (12-48-0), 1 part of trace element synergist, 10-15 parts of reinforcing agent accessory and 5-10 parts of compound additive; the fertilizer is provided by adopting various different raw materials, can produce sulfur-based and chlorine-based products according to the market, is matched with various trace elements and plant regulators, has obvious yield and efficiency increase, and can improve the quality of crops; the product has a slow release effect, improves the utilization efficiency of the fertilizer, can increase the duration of the fertilizer effect and reduce the use frequency of the fertilizer; under the condition of providing a large amount of elements, the absorption rate can be improved by about 30-50%, the absorption and utilization of trace elements of crops can be synergistically improved, and the quality of the crop products, such as vitamin content, taste and the like, can be improved.
Production and feeding: crushing all urea and an auxiliary agent, mixing, adding the crushed urea and the auxiliary agent into a melting tank, melting to form molten urea slurry, mixing potassium chloride, monoammonium phosphate, a trace element synergist, a reinforcing agent ingredient, a composite additive and the urea slurry into raw materials, and then sending the raw materials to a granulation step; the raw materials are weighed by an electronic scale and then enter the system according to the proportion.
And (3) granulation: granulating the mixed raw materials by adopting a drum granulation process; in the process step, the concentration of the urea slurry is controlled at 93 percent, the dynamic balance of the temperature between 100 ℃ and 115 ℃ is kept, the slurry is sprayed into a granulator in a molten state of the slurry, and after the slurry is mixed with other raw materials, the mixture is agglomerated into large particles under the assistance of steam.
Drying: the particles obtained in the granulation step are sent to a drying barrel with the inlet temperature of 330-370 ℃, the outlet temperature of 35-45 ℃ and the air pressure of 380-; in the drying step, a hot blast stove is adopted to generate heat, and hot air is formed by a jet induced draft fan and is introduced into a drying cylinder for drying; the hot air of the drying barrel is connected to a dust falling pool for dust falling and then discharged through a chimney; the hot blast stove generates heat by burning coal in air, and is guided into the drying cylinder through the jet induced fan to be dried, in an implemented example, the inlet temperature of the drying cylinder is controlled to be 350 ℃, the outlet temperature is controlled to be 40 ℃, the temperature is also dynamic balance, and the drying temperature is finely adjusted according to the material temperature at the drying outlet and the dry and wet conditions; the wind pressure of the cooling cylinder is set to be 350Pa, the roundness of the particles cannot be damaged under the wind pressure, most of heat of the particles can be effectively taken away, the outlet of the drying cylinder is connected to the dust settling tank, the particles are output to the next step, redundant heat and dust need to be led to the dust settling tank for dust settling, and the generated dust is prevented from polluting the environment and generating explosion risks; after the dust falling pool controls dust, the redundant heat is discharged through a chimney by a tail gas induced draft fan.
Screening and packaging: feeding the dried particles into a bucket elevator, conveying the particles into a sieving machine, sieving the particles to obtain particles with the particle size of 6-8mm, conveying the particles to a powder dusting barrel, spraying anti-caking powder with the concentration of 0.5%, dusting, and packaging to obtain a finished product; in the step, the anti-caking oil is added, the anti-caking oil can effectively prevent hardening among particles, the particle size of the granular fertilizer in the current market is generally 2.00-4.75mm, the anti-caking oil can ensure that the strength of the product can reach more than 35N by processing the granular fertilizer into the particle size of 6mm-8mm, the anti-caking effect is good, the storage and transportation properties are stable, and compared with the conventional product with the particle size of less than 10N, the anti-caking time can be prolonged by 60 days; during the use of the pond, the fertilizer can quickly sink into silt, and the dissolution and dispersion phenomena can not occur during the settling process, so that the loss of large-particle fertilizer in the falling process of a water body is reduced, and the utilization rate of the fertilizer is improved; the dissolution and release speed is slow, and the eutrophication of the water body is reduced.
In the present embodiment, mention is made of: in the step of weighing the ingredients, selecting powdery raw materials without hardening for all ingredients, and if hardening exists, sending the raw materials to a crusher to be crushed into powder for preparation; the powdery non-caking can effectively help the urea to be melted into slurry to be conveniently granulated in the granulation step.
In a preferred embodiment, mention is made of: in the step of producing the feeding materials, the temperature of a melting tank is controlled to be between 100 ℃ and 115 ℃, and the concentration of urea slurry is controlled to be between 93 percent and 95 percent; in one embodiment, the temperature of the melting tank is controlled to 110 ℃ and the concentration of the urea slurry is controlled to 93%.
In a preferred embodiment, mention is made of: in the step of feeding production, the adhesive is diluted by water and then added until the concentration is 17%; the binding agent can enhance the strength of the particles to more than 35N, has good anti-hardening effect and stable storage and transportation properties, and can prolong the anti-hardening time by 60 days compared with the conventional products with the particle size of less than 10N.
In a preferred embodiment, mention is made of: in the granulation step, a speed sensor is arranged to detect the blanking speed of the raw materials, the control end calculates the amount of gunite according to the blanking speed, and meanwhile, the control end carries out steam-assisted granulation according to the particle granulation condition and the dry and wet condition; speed sensor
In a preferred embodiment, mention is made of: in the drying step, after the cooling drum finishes cooling, the cooling drum is sent to a second cooling drum for secondary cooling, and the air pressure of the second cooling drum is 300-400 Pa.
In a preferred embodiment, mention is made of: in the drying step, a temperature sensor and a humidity sensor are arranged at the outlet of the drying cylinder, and the control end finely adjusts the outlet temperature and the inlet temperature of the drying cylinder according to data returned by the temperature sensor and the humidity sensor.
In a preferred embodiment, mention is made of: in the drying step, a hot blast stove is adopted to generate heat, and hot air is formed by a jet induced draft fan and is introduced into a drying cylinder for drying; and the hot air of the drying barrel is connected to the dust falling pool for dust falling and then discharged through a chimney.
Example 1:
taking products 16-10-16:
1. the formula is as follows: 29% of urea (46-0-0), 25% of potassium chloride (0-0-62), 20% of monoammonium phosphate (12-48-0), 1% of trace element synergist, 17% of C001 internal ingredient and 8% of compound fertilizer additive.
2. Selecting raw materials: and selecting the batches without hardening produced by the slurry method from the monoammonium phosphate.
3. Production and feeding: all urea enters a melting tank for melting, and the temperature of the melting tank is controlled to be 100-115 ℃; mixing urea and an auxiliary agent, and controlling the concentration of urea slurry to be 93-95%; other raw materials are metered by an electronic scale and enter the system according to the formula proportion. The adhesive is diluted by water in advance and enters a melting tank in proportion.
4. Spraying slurry and adding steam for granulation: when the raw materials in the system meet the granulation requirements, the slurry spraying amount is calculated by combining the blanking speed, and steam-assisted granulation is carried out according to the granulation condition and the dry and wet condition of the materials.
5. Drying, screening and packaging: the skin is sent into a drying cylinder by a belt, the inlet temperature of the drying cylinder is controlled to be 350 +/-20 ℃, the outlet temperature is controlled to be 40 +/-5 ℃, and the wind pressure is controlled to be 400 Pa; and carrying out fine adjustment on the drying temperature according to the material temperature and the dry and wet conditions at the drying outlet. The air pressure is controlled to be about 350Pa by the bucket elevator, and then the air pressure is controlled to be about 350Pa by the belt. And (4) conveying the mixture to a screening machine for screening, controlling the particle size to be 6-8MM after screening, and conveying the mixture to a powder dusting barrel for dusting powder. The product is sprayed with 0.5 per mill of anti-caking powder without adding anti-caking oil.
6. And (3) finished product detection: and (5) extracting samples according to the national standard, detecting, and performing furnace returning digestion treatment on unqualified products.
The invention has the advantages that:
the water-based series large-particle fertilizer is produced by adopting a conventional rotary drum spraying steam granulation process: the urea and the auxiliary agent enter a dissolving tank, the concentration of slurry is controlled to be about 93 percent, the temperature is kept at 100-115 ℃, the slurry is sprayed in a molten state and enters a granulator, after being mixed with other NPK raw materials, the mixture is agglomerated and rolled into large particles of 6-8mm under the assistance of steam, the particle size is uniform, and 1 percent of slow release agent is added, so that the product is slow in dissolving and releasing speed, has a slow release effect, and the utilization rate of the fertilizer is improved by over 10 percent; meanwhile, the eutrophication of the water body can be reduced.
The above disclosure is only for a few specific embodiments of the present invention, but the present invention is not limited thereto, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.
Claims (10)
1. The large-particle fertilizer is characterized by comprising an inorganic material containing urea, potassium chloride and monoammonium phosphate and a synergist containing trace elements, wherein the inorganic material and the synergist are mixed and added with a reinforcing agent ingredient and a compound additive to form the synergistic fertilizer, and the synergistic fertilizer is processed into large-particle pellets with the particle size of 6-8 mm.
2. The large granule fertilizer of claim 1, which is prepared from the following components in parts by weight:
urea: 15-35 parts;
potassium chloride: 10-35 parts;
monoammonium phosphate: 10-35 parts;
trace element synergist: 1 part;
and (3) preparing an enhancer: 10-15 parts;
compound additive: 5-10 parts.
3. A process for producing a large-particle fertilizer from the material of any one of claims 1-2, comprising the steps of:
weighing the ingredients: weighing urea, potassium chloride, monoammonium phosphate, trace element synergist, reinforcing agent ingredient and compound additive according to a formula respectively and preparing;
production and feeding: crushing all urea and an auxiliary agent, mixing, adding the crushed urea and the auxiliary agent into a melting tank, melting to form molten urea slurry, mixing potassium chloride, monoammonium phosphate, a trace element synergist, a reinforcing agent ingredient, a composite additive and the urea slurry into raw materials, and then sending the raw materials to a granulation step;
and (3) granulation: granulating the mixed raw materials by adopting a drum granulation process;
drying: the particles obtained in the granulation step are sent to a drying barrel with the inlet temperature of 330-370 ℃, the outlet temperature of 35-45 ℃ and the air pressure of 380-;
screening and packaging: and (3) feeding the dried particles into a bucket elevator, conveying the particles into a sieving machine for sieving to obtain particles with the particle size of 6-8mm, conveying the particles into a powder dusting barrel, spraying anti-caking powder with the concentration of 0.5 percent for dusting, and packaging the particles into finished products after finishing dusting.
4. The process for producing a large granule fertilizer as claimed in claim 3, wherein in the step of weighing the ingredients, the raw materials are selected from powdery raw materials without caking, and if caking exists, the raw materials are sent to a crusher to be crushed into powder to be prepared.
5. The process of claim 3, wherein the temperature of the melting tank is controlled to be between 100 ℃ and 115 ℃ and the concentration of the urea slurry is controlled to be between 93% and 95% in the step of producing the feed.
6. The process for producing a large granular fertilizer as claimed in claim 3, wherein in the step of producing the feed, the binder is diluted with water and then added until the concentration is between 15% and 18%.
7. The process for producing a large granular fertilizer as claimed in claim 3, wherein in the granulating step, a speed sensor is provided to detect the feeding speed of the raw material, the control end calculates the amount of gunite in combination with the feeding speed, and the control end performs steam-assisted granulation according to the granule granulation condition and the dry-wet condition.
8. The production process of large granular fertilizer as claimed in claim 3, wherein in the drying step, the cooled large granular fertilizer is sent to the second cooling cylinder for the second cooling, and the wind pressure of the second cooling cylinder is 300-400 Pa.
9. The process for producing large granular fertilizer as claimed in claim 3, wherein in the step of drying, the outlet of the drying cylinder is provided with a temperature and humidity sensor, and the control end performs fine adjustment of the outlet temperature and the inlet temperature of the drying cylinder according to the data returned by the temperature and humidity sensor.
10. The production process of the large-grain fertilizer as claimed in claim 3, wherein in the drying step, a hot blast stove is adopted to generate heat, and hot air is formed by a jet induced draft fan and is introduced into a drying cylinder for drying; and the hot air of the drying barrel is connected to the dust falling pool for dust falling and then discharged through a chimney.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111022994.3A CN113620750A (en) | 2021-09-01 | 2021-09-01 | Large-particle fertilizer and production process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111022994.3A CN113620750A (en) | 2021-09-01 | 2021-09-01 | Large-particle fertilizer and production process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113620750A true CN113620750A (en) | 2021-11-09 |
Family
ID=78388925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111022994.3A Pending CN113620750A (en) | 2021-09-01 | 2021-09-01 | Large-particle fertilizer and production process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113620750A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1280972A (en) * | 1999-12-29 | 2001-01-24 | 化学工业部上海化工研究院 | process for preparing high-concentration granular composite N-K fertilizer |
| CN1280971A (en) * | 1999-12-29 | 2001-01-24 | 化学工业部上海化工研究院 | Process for preparing high-concentration granular urine-base composite N-K fertilizer |
| CN105272771A (en) * | 2015-10-09 | 2016-01-27 | 马鞍山盛农粮食产业生产力促进中心有限公司 | Active trace element synergist |
-
2021
- 2021-09-01 CN CN202111022994.3A patent/CN113620750A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1280972A (en) * | 1999-12-29 | 2001-01-24 | 化学工业部上海化工研究院 | process for preparing high-concentration granular composite N-K fertilizer |
| CN1280971A (en) * | 1999-12-29 | 2001-01-24 | 化学工业部上海化工研究院 | Process for preparing high-concentration granular urine-base composite N-K fertilizer |
| CN105272771A (en) * | 2015-10-09 | 2016-01-27 | 马鞍山盛农粮食产业生产力促进中心有限公司 | Active trace element synergist |
Non-Patent Citations (1)
| Title |
|---|
| 曾锐等: "一种生态型磷酸一铵的生产工艺探究", 《化工管理》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101570455B (en) | Method for preparing particle ammonium sulfate product by organic-inorganic binder | |
| CN101575222B (en) | Method for producing ammonium sulphate grain products by using inorganic caking agent | |
| CN104326830B (en) | A kind of compound organic and inorganic fertilizer and preparation method | |
| AU654795B2 (en) | Non-destructive recovery of natural nitrogen products | |
| CN103265381A (en) | Green environment-friendly compound fertilizer prepared from three kinds of organic-inorganic nitrogen and preparation method thereof | |
| CN103232293A (en) | High-concentration compound fertilizer and production method thereof | |
| BR102018003628A2 (en) | granular fertilizers comprising macronutrients and micronutrients, and processes for their manufacture | |
| RU2629215C1 (en) | Fertiliser and method of its obtaining | |
| CN109851453A (en) | Organic and inorganic environmental protection and public nuisance free compound fertilizer | |
| CN108440197A (en) | A kind of high tower humic acid type composite fertilizer | |
| CN108046964A (en) | A kind of soil conditioner and preparation method thereof | |
| CN108675862A (en) | A kind of preparation method of formula compound fertilizer and exempt from drying production process | |
| CN1252004C (en) | Organic-inorganic compound selenium fertilizer and preparation method thereof | |
| CN113620750A (en) | Large-particle fertilizer and production process thereof | |
| WO2017206744A1 (en) | Granular ammonium phosphate having quick- and long-acting sulfur and zinc, and preparation method therefor | |
| US8062405B1 (en) | Value-added granulated organic fertilizer and process for producing the same | |
| CN110268945A (en) | Tailing planting soil and its manufacture craft | |
| CN1216832C (en) | Method for producing borium and magnesium fertilizer by using boric sludge | |
| WO2021079117A1 (en) | Composite fertiliser systems | |
| CN113287485A (en) | Organic-inorganic compound nutrient soil and preparation method thereof | |
| CN219079115U (en) | Lime nitrogen production device | |
| RU2676710C1 (en) | Fertilizer and method for its obtaining | |
| RU2675937C1 (en) | Fertilizer and method for production thereof | |
| CN101575221B (en) | Method for producing ammonium sulphate grain products by using organic caking agent | |
| CN107879849A (en) | The agricultural organic composite fertilizer slurry-spraying pelletizing technique of green |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211109 |
|
| RJ01 | Rejection of invention patent application after publication |