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Low-cost bio-based mutual-modified sustained/controlled-release fertilizer easy to biologically/optically degrade and production devices thereof

A double degradation, slow and controlled release fertilizer technology, applied in fertilization devices, spray devices, layered/coated fertilizers, etc., can solve the problems of fast heat dissipation of materials, difficult control of the reaction process, and high production energy consumption. Simple, high-quality production results

Pending Publication Date: 2020-07-31
SHANDONG AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The related patent CN101407440A discloses a rotary drum sprayer for producing controlled-release fertilizers. The device is provided with a cylinder body, a lifting board, a spraying device and a transmission device, etc., but when the device is produced, the fertilizer particles are in the process of raising the membrane material. Susceptible to wear and impact, it is easy to affect product quality, and the collection plate is easily damaged under high pressure for a long time, and the cylinder rotates through the transmission device, which consumes too much energy, making it difficult to realize automatic production
The related patent CN202390335U discloses a drum coating machine for producing coated controlled-release fertilizers. The device has structures such as a drum, a spray pipe, and a gear ring. The problem of adhesion and inner wall accumulation, the reaction process is difficult to control, and manual judgment is required. It is only suitable for small-scale production, and it is difficult to realize automation and continuous large-scale production.
The related patent CN201280526Y discloses a drum-type slow and controlled release fertilizer coating device. The device has a cylinder, a gear ring, an arc plate, a knocking block, etc., but the device does not have the function of frequency conversion and speed regulation, resulting in material heat Fast dissipation, high production energy consumption, and frequent beating has noise pollution, easy to damage the beating block and cylinder, without long-term production and use, it is difficult to realize automation and continuous production process

Method used

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  • Low-cost bio-based mutual-modified sustained/controlled-release fertilizer easy to biologically/optically degrade and production devices thereof
  • Low-cost bio-based mutual-modified sustained/controlled-release fertilizer easy to biologically/optically degrade and production devices thereof
  • Low-cost bio-based mutual-modified sustained/controlled-release fertilizer easy to biologically/optically degrade and production devices thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] Example 1: Preparation of controlled-release fertilizer using a low-cost bio-based intermodified slow-release fertilizer production device that is easy to bio / photodegradable

[0082] (1) Grind the rice husk through a 60-mesh sieve, dry for 8 hours, mix the dried rice husk, glycerin, and concentrated sulfuric acid at a ratio of 65:100:9, react at 85°C for about 100 minutes, and cool to room temperature. The plant-derived liquefied product was prepared; maleic anhydride and olive oil were mixed and reacted at 145°C for 120 minutes at a mass ratio of 296:100, and vegetable oil polyol was obtained after cooling; the plant-derived liquefied product and vegetable oil polyol were mixed at a mass ratio of 176: 103 Mix evenly to make bio-based polyol, then mix bio-based polyol, hexamethylene diisocyanate, SnO 2 According to the mass ratio of 1050:1495:2 batching, the coating material is obtained.

[0083] (2) Put 10 kg of urea granules (2-5 mm in diameter) into the barrel thro...

Embodiment 2

[0087] Example 2: Continuous production of controlled-release fertilizers using a continuous production device for low-cost bio-based intermodified slow- and controlled-release fertilizers that are easy to bio / photodegradable

[0088] (1) Grind the wheat straw through a 70-mesh sieve, dry it for 6 hours, mix the baked wheat straw, polyethylene glycol, and hydrochloric acid at a ratio of 150:100:9, react at 150°C for about 112 minutes, cool to room temperature, and prepare Obtain plant-derived liquefaction products; mix methanol and cottonseed oil at 120°C for 90 minutes at a mass ratio of 550:100, and obtain vegetable oil polyols after cooling; mix plant-derived liquefaction products and vegetable oil polyols at a mass ratio of 5:100 evenly , and then mix polyol, hydrogenated phenylmethane diisocyanate, and CdS according to the ratio of 244:65:10 to prepare the coating material.

[0089] (2) Open the metering valve on the feeding pipe, so that the first batch of 200kg compound...

Embodiment 3

[0091] Add 100kg of potassium nitrate granules (diameter 2-4mm) into the production device to preheat the fertilizer to 70°C; spray 1kg of trace element chelating liquid on the surface of the preheated fertilizer granules, and react for about 8 minutes; grind the rice bran Pass through a 90-mesh sieve, dry for 6 hours, mix the dried rice bran, tetrahydrofuran and 1,4-butanediol 1:2 mixture, and phosphoric acid at a ratio of 100:100:2, react at 180°C for about 180 minutes, and cool to room temperature. The plant source liquefaction product was prepared; ethanol, flax oil, and potassium hydroxide were mixed and reacted at 80°C for 75 minutes at a mass ratio of 150:100:13, and vegetable oil polyols were obtained after cooling; the plant source liquefaction products and vegetable oil polyols were prepared according to The mass ratio is 1:1 and mixed evenly to obtain bio-based polyol, then bio-based polyol, diphenylmethane diisocyanate, TiO 2 It is formulated according to the mass ...

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Abstract

The invention discloses a low-cost bio-based mutually-modified sustained / controlled release fertilizer easy to biologically / optically degrade. The fertilizer comprises fertilizer particles; a modifying layer formed by spraying a surface modifier on the surfaces of the fertilizer particles; and a bio-based polyurethane layer, wherein the bio-based polyurethane layer is formed by spraying a bio-based mutual modified coating material on the modifying layer. The invention also discloses a device for producing the fertilizer and a device for continuously producing the fertilizer. The device for producing the fertilizer comprises a cylinder body and a driving device for driving the cylinder body to rotate, wherein a machine head sealing cover and a machine tail sealing cover are respectively arranged at two ends of the cylinder body, and an infrared monitoring probe and a spraying system are arranged in the cylinder body. According to the present invention, a renewable bio-based material isadopted, such that the environmental protection is achieved, the disadvantages of the existing bio-based coating material are improved through the mutual modification of the two components, the novelprocess technology is provided for the coating of the controlled release fertilizer, and the continuous and automatic production of the fertilizer can be achieved.

Description

technical field [0001] The invention relates to the technical field of fertilizer production, in particular to a low-cost bio-based intermodified slow-controlled release fertilizer and a production device thereof, which are easy to be biodegraded and photodegradable. Background technique [0002] Controlled-release fertilizers mainly control the release of nutrients through coating technology to achieve safety, long-term, and high-efficiency purposes. The choice of coating material will directly affect the performance of the control fertilizer. At present, petroleum-based polymers and bio-based materials can be used as coating materials for controlled-release fertilizers. Compared with petroleum-based polymers, bio-based materials have the advantages of low cost, renewable, wide-ranging sources, and biodegradability. The current development direction of controlled-release fertilizers tends to be degradable membrane materials, and the use of bio-based materials has become a ...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G5/30C05G3/90C05G3/40B05B16/20B05B13/02
CPCB05B16/20B05B13/0257
Inventor 刘之广田虹雨陆盘芳张民
Owner SHANDONG AGRICULTURAL UNIVERSITY
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