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Film-coated slow release fertilizer as well as preparation method and device thereof

A technology of coated slow-release and slow-release fertilizers, which is applied in the direction of layered/coated fertilizers, nitrogen fertilizers, and potassium fertilizers. It can solve problems such as high fertilizer costs, secondary pollution, and the outer coating is not easy to degrade, and achieve improved soil quality. , saving energy and facilitating large-scale production

Inactive Publication Date: 2017-05-31
INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Mainly because the outer coating (material) used for controlled-release fertilizer / slow-release fertilizer is organic nitrogen compounds such as active minerals, organic polymers and inhibitors, the cost of fertilizer is high, and the outer coating (material) is not easy to degrade, easy to cause secondary pollution

Method used

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  • Film-coated slow release fertilizer as well as preparation method and device thereof
  • Film-coated slow release fertilizer as well as preparation method and device thereof
  • Film-coated slow release fertilizer as well as preparation method and device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] Embodiment 1, the equipment that makes coated slow-release fertilizer

[0090] Such as figure 1 Shown is a schematic structural view of the equipment for making coated slow-release fertilizer according to the present invention.

[0091] Depend on figure 1 It can be seen that the equipment for making coated slow-release fertilizer in the present invention includes the first solvent making module 11, the second solvent making module 12, the coating liquid making module 13, the slow-release granular fertilizer making module 14 and the coated slow-release fertilizer. Release fertilizer generating module 15.

[0092] The first solvent making module 11 comprises a connected heating unit (not shown in the figure) and a gelatinization unit (not shown in the figure), wherein the heating unit is used to heat distilled water to 45 ° C, and the gelatinization unit is used to mix water with The starch mixture is gelatinized under stirring, and the first solvent is obtained after ...

Embodiment 2

[0117] Embodiment 2, making coated slow-release fertilizer

[0118] (1) Select wheat straw, and carry out the following treatment in the straw processing unit: air-dried, crushed through a 10-mesh sieve, and stored for future use.

[0119] (2) Add 2500kg of distilled water to the heating unit and heat to 45°C, stop heating, add 50kg of starch, and stir in the gelatinization unit for 30min until uniform, as the first solvent.

[0120] (3) Add 40 kg of polyethylene glycol (molecular weight: 800) to the first solvent, and stir evenly in the second solvent production unit 12 to increase moldability as the second solvent.

[0121] (4) Take by weighing 500kg pulverized wheat stalks, 15kg bentonite and 25kg tobacco scraps, mix uniformly together in coating solution making module 13, add 50kg second solvent, mix well quickly, as coating solution (i.e. outer coating material), wherein, the mass percentage of wheat straw in the outer coating material is 84.75%, the mass percentage of sta...

Embodiment 3

[0125] Embodiment 3, making coated slow-release fertilizer

[0126] (1) Select corn stalks, and carry out the following treatment in the straw processing unit: air-dry, crush through a 10-mesh sieve, and store for future use.

[0127] (2) Add 2500kg of distilled water to the heating unit and heat to 45°C, stop heating, add 20kg of starch, and stir in the gelatinization unit for 30min until uniform, as the first solvent.

[0128] (3) add 80kg konjac gum in the first solvent, stir in the second solvent production unit 12, to increase formability, as the second solvent.

[0129] (4) Take by weighing 500kg pulverized corn stalks, 10kg bentonite and 15kg tobacco scraps, mix uniformly together in coating solution making module 13, add 50kg second solvent, mix well quickly, as coating solution (i.e. outer coating material), wherein the mass percentage of corn stalks in the outer coating material is 86.96%, the mass percentage of starch is 0.07%, the mass percentage of bentonite is 1...

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Abstract

The invention discloses film-coated slow release fertilizer as well as a preparation method and device thereof. An outer film coating material for controlled release fertilizer or slow release fertilizer is prepared from crop straw and auxiliaries, wherein the mass percent of the crop straw is 85%-90%. The film-coated slow release fertilizer comprises an outer coating film and inner stuffing coated with the outer coating film, wherein the outer coating film is prepared from the outer film coating material; the inner stuffing is inorganic fertilizer. The device for preparing the film-coated slow release fertilizer comprises a first solvent preparation module, a second solvent preparation module, a film coating liquid preparation module, a slow release granule fertilizer preparation module and a film-coated slow release fertilizer production module which are connected sequentially, wherein the first solvent preparation module comprises a heating unit and a pasting unit which are connected; each of the second solvent preparation module and the film coating liquid preparation module comprises a starrier; the slow release granule fertilizer preparation module comprises a film coating tower; the film-coated slow release production module comprises a blasting device. The cost of the film-coated slow release fertilizer can be reduced, and secondary pollution to the environment can be reduced.

Description

technical field [0001] The invention relates to a film-coated slow-release fertilizer, a preparation method and production equipment thereof, and belongs to the technical field of film-coated slow-release fertilizers. Background technique [0002] Soil is the basic condition for human survival and all social activities. It is an important factor to ensure the growth and development of crops. Improving soil fertility and avoiding environmental pollution of soil and water resources by fertilizers is the basis for agricultural development and sustainable agricultural development. significant factor. Among them, the development of efficient, ecological, simplified and safe new fertilizers to improve soil fertility and avoid soil pollution by fertilizers has become the main content of fertilizer scientific research at home and abroad. [0003] Controlled-release fertilizer / slow-release fertilizer is a new type of coated slow-release fertilizer that is widely used at present. It ...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/08C05G3/90
CPCC05B1/02C05G3/00C05G3/90C05G5/30C05C9/00C05D1/02
Inventor 逄焕成王婧张莉
Owner INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
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