CN112500230A - Banana bagged controlled-release fertilizer with stable controlled-release rate and preparation method thereof - Google Patents
Banana bagged controlled-release fertilizer with stable controlled-release rate and preparation method thereof Download PDFInfo
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- CN112500230A CN112500230A CN202011527633.XA CN202011527633A CN112500230A CN 112500230 A CN112500230 A CN 112500230A CN 202011527633 A CN202011527633 A CN 202011527633A CN 112500230 A CN112500230 A CN 112500230A
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- 239000003337 fertilizer Substances 0.000 title claims abstract description 185
- 238000013270 controlled release Methods 0.000 title claims abstract description 142
- 241000234295 Musa Species 0.000 title claims abstract description 53
- 235000018290 Musa x paradisiaca Nutrition 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 229920005989 resin Polymers 0.000 claims abstract description 50
- 239000011347 resin Substances 0.000 claims abstract description 50
- 239000000463 material Substances 0.000 claims abstract description 36
- 239000004698 Polyethylene Substances 0.000 claims abstract description 25
- -1 polyethylene Polymers 0.000 claims abstract description 25
- 229920000573 polyethylene Polymers 0.000 claims abstract description 25
- 229920006327 polystyrene foam Polymers 0.000 claims abstract description 25
- 235000015097 nutrients Nutrition 0.000 claims abstract description 9
- 239000011248 coating agent Substances 0.000 claims abstract description 8
- 239000010410 layer Substances 0.000 claims description 83
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 45
- 239000004202 carbamide Substances 0.000 claims description 45
- 239000003795 chemical substances by application Substances 0.000 claims description 31
- 239000007888 film coating Substances 0.000 claims description 31
- 238000009501 film coating Methods 0.000 claims description 31
- 239000002245 particle Substances 0.000 claims description 24
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 18
- 238000005507 spraying Methods 0.000 claims description 18
- 239000011241 protective layer Substances 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 7
- 239000000243 solution Substances 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 240000000905 Nymphoides indica Species 0.000 claims description 6
- 235000017590 Nymphoides indica Nutrition 0.000 claims description 6
- CYTYCFOTNPOANT-UHFFFAOYSA-N Perchloroethylene Chemical group ClC(Cl)=C(Cl)Cl CYTYCFOTNPOANT-UHFFFAOYSA-N 0.000 claims description 6
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 6
- 229920002472 Starch Polymers 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 238000013329 compounding Methods 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 239000012046 mixed solvent Substances 0.000 claims description 6
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 6
- 235000019698 starch Nutrition 0.000 claims description 6
- 239000008107 starch Substances 0.000 claims description 6
- 229950011008 tetrachloroethylene Drugs 0.000 claims description 6
- 229920000642 polymer Polymers 0.000 claims description 5
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 claims description 3
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 3
- 229920002396 Polyurea Polymers 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- 239000001099 ammonium carbonate Substances 0.000 claims description 3
- 235000012501 ammonium carbonate Nutrition 0.000 claims description 3
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 claims description 3
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 claims description 3
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 3
- 235000011130 ammonium sulphate Nutrition 0.000 claims description 3
- 229910052796 boron Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 claims description 3
- 229910000388 diammonium phosphate Inorganic materials 0.000 claims description 3
- 235000019838 diammonium phosphate Nutrition 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 239000011733 molybdenum Substances 0.000 claims description 3
- 235000019837 monoammonium phosphate Nutrition 0.000 claims description 3
- 229920000058 polyacrylate Polymers 0.000 claims description 3
- 229920000515 polycarbonate Polymers 0.000 claims description 3
- 239000004417 polycarbonate Substances 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 229920000098 polyolefin Polymers 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 239000001103 potassium chloride Substances 0.000 claims description 3
- 235000011164 potassium chloride Nutrition 0.000 claims description 3
- 235000010333 potassium nitrate Nutrition 0.000 claims description 3
- 239000004323 potassium nitrate Substances 0.000 claims description 3
- 239000011573 trace mineral Substances 0.000 claims description 3
- 235000013619 trace mineral Nutrition 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 235000021015 bananas Nutrition 0.000 abstract description 8
- 230000007613 environmental effect Effects 0.000 abstract description 6
- 239000002689 soil Substances 0.000 abstract description 5
- 230000007774 longterm Effects 0.000 abstract description 4
- 239000012528 membrane Substances 0.000 abstract description 4
- 238000002791 soaking Methods 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 229920006395 saturated elastomer Polymers 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 4
- 230000004720 fertilization Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 2
- 239000002105 nanoparticle Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 238000013268 sustained release Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- C05G5/00—Fertilisers characterised by their form
- C05G5/10—Solid or semi-solid fertilisers, e.g. powders
- C05G5/12—Granules or flakes
-
- 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
- C05G5/30—Layered or coated, e.g. dust-preventing coatings
Abstract
The invention discloses a banana bagged controlled release fertilizer with stable controlled release rate and a preparation method thereof. The banana bagged controlled-release fertilizer with stable controlled-release rate and the preparation method thereof have the advantages that the soil environment for banana growth is mainly in a water half-saturated state, the outer layer membrane material of the controlled-release fertilizer is non-aqueous recycled polyethylene film resin and recycled polystyrene foam resin, the controlled-release performance cannot be lost due to long-term soaking or loss of moisture, the working state with stable controlled-release rate can be further realized, the environmental requirements of different growth cycles of bananas are met, the nutrient controlled-release is good, and the outer layer membrane is an outer layer membrane coating agent and has good constant humidity performance.
Description
Technical Field
The invention relates to the technical field of banana bagged controlled release fertilizers, in particular to a banana bagged controlled release fertilizer with stable controlled release rate and a preparation method thereof.
Background
In the process of obtaining rapid development of banana industry, various problems and challenges affecting sustainable development are faced, such as fertilization problem, the controlled release fertilizer technology is considered to be one of the current scientific fertilization technologies, the controlled release fertilizer is a synchronous nutrient fertilizer, the latest fertilizer which is a physicochemical soil testing formula fertilization theory and technology is a top-grade fertilizer for soil testing formula fertilization, the utilization rate of the fertilizer in China is low, huge waste on economic energy is caused and various environmental problems are caused, therefore, the bagged controlled release fertilizer adapted to bananas is gradually produced, but the existing banana bagged controlled release fertilizer has certain defects, such as:
1. the controlled release rate of the existing bagged banana controlled release fertilizer is not stable enough, and the controlled release performance can be lost due to long-term soaking or loss of moisture, so that the environmental requirements of different growth cycles of bananas can not be met;
2. the existing bagged banana controlled-release fertilizer has no good constant humidity performance, so that the phenomenon that nutrients are lost too fast at the root of a banana in a growth stage is very easy to occur, certain use limitation exists, and the subsequent growth quality of the banana cannot be guaranteed.
Aiming at the problems, innovative design based on the original preparation method is urgently needed.
Disclosure of Invention
The invention aims to provide a bagged banana controlled-release fertilizer with stable controlled-release rate and a preparation method thereof, and aims to solve the problems that the controlled-release rate provided in the background technology is not stable enough, the controlled-release performance is lost due to long-term soaking or loss of moisture, the environmental requirements of bananas in different growth cycles cannot be met, the root of a banana is very easy to cause the phenomenon of too fast nutrient loss in the growth stage due to no good constant humidity performance, the subsequent growth quality of the banana cannot be guaranteed, and the environmental requirements of bananas in different growth cycles cannot be met.
In order to achieve the purpose, the invention provides the following technical scheme: a bagged banana controlled-release fertilizer with stable controlled-release rate and a preparation method thereof are disclosed.
Preferably, the polymer coated fertilizer is a polymer protective layer coated granular fertilizer.
Preferably, the constant-humidity controlled-release fertilizer with the double-layer coating structure has the advantages that the inner layer film is a high-molecular protective layer film material and has the nutrient controlled-release performance, and the outer layer film is an outer layer film coating agent and has good constant-humidity performance.
Preferably, the polymer protective layer film material is one or more of polyolefin, polyurethane, polyacrylate, polyester, polyurea or polycarbonate.
Preferably, the mass of the protective layer film material accounts for 5-20% of the mass of the high polymer coated fertilizer.
Preferably, the core fertilizer particles are water-soluble granular fertilizers and have the particle size of 2-5 mm.
Preferably, the core fertilizer particles are elementary fertilizers, compound fertilizers or elementary fertilizers or compound fertilizers containing trace elements of iron, manganese, boron, zinc, copper or molybdenum, and comprise one or more of urea, ammonium carbonate, ammonium nitrate, ammonium sulfate, potassium chloride, potassium nitrate, diammonium hydrogen phosphate or ammonium dihydrogen phosphate.
A preparation method of banana bagged controlled-release fertilizer with stable controlled-release rate comprises the following steps:
s1, preheating the controlled release fertilizer raw materials to 40-50 ℃ in a rotary drum, continuously spraying 1-10 parts of a blending aqueous solution of a micron-grade material and a nano-grade material, wherein the weight ratio of the micron-grade material to the nano-grade material is 0.5-3: 1, onto the surface of 300 parts of core fertilizer particles under the pressure of 0.1-0.5MPa, and then spraying 125 ℃ molten urea solution onto the core fertilizer particles which continuously rotate in the rotary drum to form a urea film, wherein the mass of the urea film accounts for 4-6 wt% of the mass of the core fertilizer, so as to obtain the urea coated fertilizer;
s2, taking back the recovered polyethylene film resin and the recovered polystyrene foam resin according to the mass ratio of 1-3: 1, dissolving the recovered polyethylene film resin and the recovered polystyrene foam resin in a mixed solvent of dichloromethane and tetrachloroethylene according to the mass ratio of 1: 1-4 for 0.1-3h, adding banana plant starch accounting for 1-2 wt% of the total amount of the recovered polyethylene film resin and the recovered polystyrene foam resin, and uniformly mixing to obtain an outer film coating agent;
s3, preheating the urea coated fertilizer prepared in S1 in a rotary drum to 80-90 ℃, simultaneously preheating the outer layer film coating agent prepared in S2 to 125 ℃, spraying the outer layer film coating agent onto the continuously rotating urea coated fertilizer through a spray nozzle, and drying for 0.1-3 hours at the temperature of 30-150 ℃, wherein the dosage of the outer layer film coating agent accounts for 4wt%, 6wt% and 8wt% of the urea coated fertilizer respectively according to the total amount of the recycled polyethylene film resin and the recycled polystyrene foam resin, and the corresponding first double-layer coated controlled release fertilizer, second double-layer coated controlled release fertilizer and third double-layer coated controlled release fertilizer are respectively obtained.
S4, compounding the first double-layer coated controlled release fertilizer, the second double-layer coated controlled release fertilizer and the third double-layer coated controlled release fertilizer prepared in the S3 according to the mass ratio of 1: 1-3: 1-2 to obtain the banana bagged controlled release fertilizer with stable controlled release rate, and bagging the banana bagged controlled release fertilizer by bagging equipment.
Compared with the prior art, the invention has the beneficial effects that: the banana bagged controlled release fertilizer with stable controlled release rate and the preparation method thereof;
1. the soil environment for banana growth is mainly in a water semi-saturated state, the outer layer membrane material of the controlled release fertilizer is non-aqueous recycled polyethylene film resin and recycled polystyrene foam resin, the controlled release performance cannot be lost due to long-term soaking or loss of water, and the working state with stable controlled release rate can be realized, so that the environmental requirements of different growth cycles of bananas are met, and the service cycle and the range of the bananas are improved;
2. the fertilizer has the characteristics of nutrient sustained and controlled release, drought resistance, water saving and soil structure improvement, the constant-humidity controlled release fertilizer with a double-layer coating structure is formed by taking the high-molecular coated fertilizer as an inner core, the outer-layer film coating agent as an outer layer and the center as core fertilizer particles, the inner layer film of the constant-humidity controlled release fertilizer with the double-layer coating structure is a high-molecular protective layer film material, the fertilizer has nutrient controlled release performance, and the outer layer film is the outer-layer film coating agent, so that the fertilizer has good constant humidity performance and improves the subsequent growth quality of bananas.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. 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.
The invention provides a technical scheme that: a banana bagged controlled release fertilizer with stable controlled release rate and a preparation method thereof, which comprises a first double-layer coated controlled release fertilizer, a second double-layer coated controlled release fertilizer and a third double-layer coated controlled release fertilizer, and is characterized in that: the high molecular coated fertilizer of the controlled release fertilizer is taken as an inner core, an outer layer film coating agent is taken as an outer layer, and the center is taken as core fertilizer particles, so that the constant humidity controlled release fertilizer with a double-layer coating structure is formed.
The high molecular coated fertilizer is a high molecular protective layer coated granular fertilizer.
The inner film of the constant-humidity controlled-release fertilizer with the double-layer coating structure is a high-molecular protective layer film material and has nutrient controlled-release performance, and the outer film is an outer film coating agent and has good constant-humidity performance.
The high molecular protective layer film material is one or more of polyolefin, polyurethane, polyacrylate, polyester, polyurea or polycarbonate.
The mass of the protective layer film material accounts for 5-20% of the mass of the high molecular coated fertilizer.
The core fertilizer particles are water-soluble granular fertilizer with the particle size of 2-5 mm.
The core fertilizer particles are elementary fertilizers, compound fertilizers or elementary fertilizers or compound fertilizers containing trace elements of iron, manganese, boron, zinc, copper or molybdenum, and comprise one or more of urea, ammonium carbonate, ammonium nitrate, ammonium sulfate, potassium chloride, potassium nitrate, diammonium hydrogen phosphate or ammonium dihydrogen phosphate.
Example 1:
a preparation method of banana bagged controlled-release fertilizer with stable controlled-release rate is characterized in that: the method comprises the following steps:
s1, preheating the raw materials of the controlled release fertilizer to 40 ℃ in a rotary drum, continuously spraying 2 parts of a blending aqueous solution of a micron-grade material and a nano-grade material, wherein the weight ratio of the micron-grade material to the nano-grade material is 0.5-3: 1, onto the surface of 100 parts of core fertilizer particles under the pressure of 0.1-0.5MPa, and then spraying a urea solution melted at 125 ℃ onto the core fertilizer particles which continuously rotate in the rotary drum to form a urea film, wherein the mass of the urea film accounts for 4wt% of the mass of the core fertilizer, so as to obtain the urea coated fertilizer;
s2, taking back the reclaimed polyethylene film resin and the reclaimed polystyrene foam resin according to the mass ratio of 1: 1, dissolving the reclaimed polyethylene film resin and the reclaimed polystyrene foam resin in a mixed solvent of dichloromethane and tetrachloroethylene according to the mass ratio of 1: 1 for 0.5h, adding banana plant starch accounting for 1wt% of the total amount of the reclaimed polyethylene film resin and the reclaimed polystyrene foam resin, and uniformly mixing to obtain an outer film coating agent;
s3, preheating the urea coated fertilizer prepared in S1 to 80 ℃ in a rotary drum, simultaneously preheating an outer layer film coating agent prepared in S2 to 125 ℃, spraying the outer layer film coating agent onto the continuously rotating urea coated fertilizer through a spray nozzle, and drying for 0.5h at the temperature of 50 ℃, wherein the dosage of the outer layer film coating agent accounts for 4wt%, 6wt% and 8wt% of the urea coated fertilizer respectively according to the total amount of the recycled polyethylene film resin and the recycled polystyrene foam resin, and the corresponding first double-layer coated controlled release fertilizer, second double-layer coated controlled release fertilizer and third double-layer coated controlled release fertilizer are respectively obtained.
S4, compounding the first double-layer coated controlled release fertilizer, the second double-layer coated controlled release fertilizer and the third double-layer coated controlled release fertilizer prepared in the S3 according to the mass ratio of 1: 1 to obtain the banana bagged controlled release fertilizer with stable controlled release rate, and bagging the banana bagged controlled release fertilizer by bagging equipment.
Example 2:
a preparation method of banana bagged controlled-release fertilizer with stable controlled-release rate comprises the following steps:
s1, preheating the raw materials of the controlled release fertilizer to 45 ℃ in a rotary drum, continuously spraying 5 parts of a blending aqueous solution of a micron-grade material and a nano-grade material, wherein the weight ratio of the micron-grade material to the nano-grade material is 0.5-3: 1, onto the surface of 200 parts of core fertilizer particles under the pressure of 0.1-0.5MPa, and then spraying a urea solution melted at 125 ℃ onto the core fertilizer particles which continuously rotate in the rotary drum to form a urea film, wherein the mass of the urea film accounts for 5wt% of the mass of the core fertilizer, so as to obtain the urea coated fertilizer;
s2, taking back the reclaimed polyethylene film resin and the reclaimed polystyrene foam resin according to the mass ratio of 2: 1, dissolving the reclaimed polyethylene film resin and the reclaimed polystyrene foam resin in a mixed solvent of dichloromethane and tetrachloroethylene according to the mass ratio of 1: 2 for 1h, adding banana plant starch accounting for 1.5wt% of the total amount of the reclaimed polyethylene film resin and the reclaimed polystyrene foam resin, and uniformly mixing to obtain an outer film coating agent;
s3, preheating the urea coated fertilizer prepared in S1 to 85 ℃, simultaneously preheating the outer layer film coating agent prepared in S2 to 125 ℃, spraying the outer layer film coating agent onto the continuously rotating urea coated fertilizer through a spray nozzle, and drying for 2 hours at the temperature of 80 ℃, wherein the dosage of the outer layer film coating agent accounts for 4wt%, 6wt% and 8wt% of the urea coated fertilizer respectively according to the total amount of the recycled polyethylene film resin and the recycled polystyrene foam resin, and the corresponding first double-layer coated controlled release fertilizer, second double-layer coated controlled release fertilizer and third double-layer coated controlled release fertilizer are respectively obtained.
S4, compounding the first double-layer coated controlled release fertilizer, the second double-layer coated controlled release fertilizer and the third double-layer coated controlled release fertilizer prepared in the S3 according to the mass ratio of 1: 2: 1.5 to obtain the banana bagged controlled release fertilizer with stable controlled release rate, and bagging the banana bagged controlled release fertilizer by bagging equipment.
Example 3:
a preparation method of banana bagged controlled-release fertilizer with stable controlled-release rate comprises the following steps:
s1, preheating the raw materials of the controlled release fertilizer to 48 ℃, continuously spraying 9 parts of blended aqueous solution of micron-sized materials and nano-sized materials, wherein the weight ratio of the micron-sized materials to the nano-sized materials is 2.5:1, onto the surface of 250 parts of core fertilizer particles under the pressure of 0.4MPa, and then spraying 125 ℃ molten urea solution onto the core fertilizer particles which continuously rotate in the rotary drum to form a urea film, wherein the mass of the urea film accounts for 5.5wt% of that of the core fertilizer, so as to obtain the urea coated fertilizer;
s2, taking back the recycled polyethylene film resin and the recycled polystyrene foam resin according to the mass ratio of 1-3: 1, dissolving the two in a mixed solvent of dichloromethane and tetrachloroethylene according to the mass ratio of 1: 3 for 2.5h, adding banana plant starch accounting for 1.8wt% of the total amount of the recycled polyethylene film resin and the recycled polystyrene foam resin, and uniformly mixing to obtain an outer film coating agent;
s3, preheating the urea coated fertilizer prepared in S1 to 86 ℃ in a rotary drum, simultaneously preheating an outer layer film coating agent prepared in S2 to 125 ℃, spraying the outer layer film coating agent onto the continuously rotating urea coated fertilizer through a spray nozzle, and drying for 2.5 hours at the temperature of 120 ℃, wherein the dosage of the outer layer film coating agent accounts for 4wt%, 6wt% and 8wt% of the urea coated fertilizer respectively according to the total amount of the recycled polyethylene film resin and the recycled polystyrene foam resin, and the corresponding first double-layer coated controlled release fertilizer, second double-layer coated controlled release fertilizer and third double-layer coated controlled release fertilizer are respectively obtained.
S4, compounding the first double-layer coated controlled release fertilizer, the second double-layer coated controlled release fertilizer and the third double-layer coated controlled release fertilizer prepared in the S3 according to the mass ratio of 1: 2.5: 1.8 to obtain the banana bagged controlled release fertilizer with stable controlled release rate, and bagging the banana bagged controlled release fertilizer by bagging equipment.
Example 4:
a preparation method of banana bagged controlled-release fertilizer with stable controlled-release rate comprises the following steps:
s1, preheating the raw materials of the controlled release fertilizer to 50 ℃ in a rotary drum, continuously spraying 10 parts of a blended aqueous solution of a micron-grade material and a nano-grade material, wherein the weight ratio of the micron-grade material to the nano-grade material is 3:1, onto the surface of 300 parts of core fertilizer particles at a pressure of 0.1-0.5MPa, and then spraying a urea solution melted at 125 ℃ onto the core fertilizer particles which continuously rotate in the rotary drum to form a urea film, wherein the mass of the urea film accounts for 6wt% of the mass of the core fertilizer, so as to obtain the urea coated fertilizer;
s2, taking back the reclaimed polyethylene film resin and the reclaimed polystyrene foam resin according to the mass ratio of 3:1, dissolving the reclaimed polyethylene film resin and the reclaimed polystyrene foam resin in a mixed solvent of dichloromethane and tetrachloroethylene according to the mass ratio of 1: 4 for 3 hours, adding banana plant starch accounting for 2wt% of the total amount of the reclaimed polyethylene film resin and the reclaimed polystyrene foam resin, and uniformly mixing to obtain an outer film coating agent;
s3, preheating the urea coated fertilizer prepared in S1 to 90 ℃ in a rotary drum, simultaneously preheating an outer layer film coating agent prepared in S2 to 125 ℃, spraying the outer layer film coating agent onto the continuously rotating urea coated fertilizer through a spray nozzle, and drying for 3 hours at the temperature of 150 ℃, wherein the dosage of the outer layer film coating agent accounts for 4wt%, 6wt% and 8wt% of the urea coated fertilizer respectively according to the total amount of the recycled polyethylene film resin and the recycled polystyrene foam resin, and the corresponding first double-layer coated controlled release fertilizer, second double-layer coated controlled release fertilizer and third double-layer coated controlled release fertilizer are respectively obtained.
S4, compounding the first double-layer coated controlled release fertilizer, the second double-layer coated controlled release fertilizer and the third double-layer coated controlled release fertilizer prepared in the S3 according to the mass ratio of 1: 3: 2 to obtain the banana bagged controlled release fertilizer with stable controlled release rate, and bagging the banana bagged controlled release fertilizer by bagging equipment.
Those not described in detail in this specification are within the skill of the art.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A banana bagged controlled release fertilizer with stable controlled release rate comprises a first double-layer coated controlled release fertilizer, a second double-layer coated controlled release fertilizer and a third double-layer coated controlled release fertilizer, and is characterized in that: the high molecular coated fertilizer of the controlled release fertilizer is taken as an inner core, an outer layer film coating agent is taken as an outer layer, and the center is taken as core fertilizer particles, so that the constant humidity controlled release fertilizer with a double-layer coating structure is formed.
2. The banana bagged controlled release fertilizer with stable controlled release rate according to claim 1, characterized in that: the high-molecular coated fertilizer is a high-molecular protective layer coated granular fertilizer.
3. The banana bagged controlled release fertilizer with stable controlled release rate according to claim 1, characterized in that: the constant-humidity controlled-release fertilizer with the double-layer coating structure has the advantages that the inner layer film is a high-molecular protective layer film material and has the nutrient controlled-release performance, and the outer layer film is an outer layer film coating agent and has good constant-humidity performance.
4. The banana bagged controlled release fertilizer with stable controlled release rate according to claim 1, characterized in that: the high-molecular protective layer film material is one or more of polyolefin, polyurethane, polyacrylate, polyester, polyurea or polycarbonate.
5. The banana bagged controlled release fertilizer with stable controlled release rate according to claim 1, characterized in that: the mass of the protective layer film material accounts for 5-20% of the mass of the high polymer coated fertilizer.
6. The banana bagged controlled release fertilizer with stable controlled release rate according to claim 1, characterized in that: the core fertilizer particles are water-soluble granular fertilizers, and the particle size is 2-5 mm.
7. The banana bagged controlled release fertilizer with stable controlled release rate according to claim 1, characterized in that: the core fertilizer particles are elementary fertilizers, compound fertilizers or elementary fertilizers or compound fertilizers containing trace elements of iron, manganese, boron, zinc, copper or molybdenum, and comprise one or more of urea, ammonium carbonate, ammonium nitrate, ammonium sulfate, potassium chloride, potassium nitrate, diammonium hydrogen phosphate or ammonium dihydrogen phosphate.
8. The preparation method of the banana bagged controlled release fertilizer with stable controlled release rate according to claim 1, which is characterized in that: the method comprises the following steps:
s1, preheating the controlled release fertilizer raw materials to 40-50 ℃ in a rotary drum, continuously spraying 1-10 parts of a blending aqueous solution of a micron-grade material and a nano-grade material, wherein the weight ratio of the micron-grade material to the nano-grade material is 0.5-3: 1, onto the surface of 300 parts of core fertilizer particles under the pressure of 0.1-0.5MPa, and then spraying 125 ℃ molten urea solution onto the core fertilizer particles which continuously rotate in the rotary drum to form a urea film, wherein the mass of the urea film accounts for 4-6 wt% of the mass of the core fertilizer, so as to obtain the urea coated fertilizer;
s2, taking back the recovered polyethylene film resin and the recovered polystyrene foam resin according to the mass ratio of 1-3: 1, dissolving the recovered polyethylene film resin and the recovered polystyrene foam resin in a mixed solvent of dichloromethane and tetrachloroethylene according to the mass ratio of 1: 1-4 for 0.1-3h, adding banana plant starch accounting for 1-2 wt% of the total amount of the recovered polyethylene film resin and the recovered polystyrene foam resin, and uniformly mixing to obtain an outer film coating agent;
s3, preheating the urea coated fertilizer prepared in S1 in a rotary drum to 80-90 ℃, simultaneously preheating the outer layer film coating agent prepared in S2 to 125 ℃, spraying the outer layer film coating agent onto the continuously rotating urea coated fertilizer through a spray nozzle, and drying for 0.1-3 hours at the temperature of 30-150 ℃, wherein the dosage of the outer layer film coating agent accounts for 4wt%, 6wt% and 8wt% of the urea coated fertilizer respectively according to the total amount of the recycled polyethylene film resin and the recycled polystyrene foam resin, and the corresponding first double-layer coated controlled release fertilizer, second double-layer coated controlled release fertilizer and third double-layer coated controlled release fertilizer are respectively obtained.
S4, compounding the first double-layer coated controlled release fertilizer, the second double-layer coated controlled release fertilizer and the third double-layer coated controlled release fertilizer prepared in the S3 according to the mass ratio of 1: 1-3: 1-2 to obtain the banana bagged controlled release fertilizer with stable controlled release rate, and bagging the banana bagged controlled release fertilizer by bagging equipment.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102807445A (en) * | 2012-08-30 | 2012-12-05 | 菏泽金正大生态工程有限公司 | Preparation method for controlled-release fertilizer special for mechanically applied rice |
| CN107032891A (en) * | 2017-05-10 | 2017-08-11 | 山东农业大学 | A kind of super-hydrophobic bio-based film-coated controlled release fertilizer and preparation method thereof |
| CN109896888A (en) * | 2017-12-09 | 2019-06-18 | 山东粮源生物有机肥有限公司 | A kind of moisture-retention sustained release and release control fertilizer |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102807445A (en) * | 2012-08-30 | 2012-12-05 | 菏泽金正大生态工程有限公司 | Preparation method for controlled-release fertilizer special for mechanically applied rice |
| CN107032891A (en) * | 2017-05-10 | 2017-08-11 | 山东农业大学 | A kind of super-hydrophobic bio-based film-coated controlled release fertilizer and preparation method thereof |
| CN109896888A (en) * | 2017-12-09 | 2019-06-18 | 山东粮源生物有机肥有限公司 | A kind of moisture-retention sustained release and release control fertilizer |
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