A kind of biochar-based urea fertilizer osmotic fusion fertilizer method

A biochar and urea-based technology, applied in the field of biomass resource utilization, can solve the problems of difficulty in combining chemical fertilizers and low strength of biomass charcoal fertilizers, and achieve the effects of easy adjustment and control, good carbonization effect, and improved compressive strength

Active Publication Date: 2021-02-19
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the problems that the current biomass charcoal fertilizer has low strength and is difficult to combine with chemical fertilizers, the object of the present invention is to provide a biochar-based urea fertilizer osmotic fusion fertilizer method

Method used

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  • A kind of biochar-based urea fertilizer osmotic fusion fertilizer method
  • A kind of biochar-based urea fertilizer osmotic fusion fertilizer method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Weigh 0.3g of biochar powder with a particle size of 0.075-0.1mm, and 0.2g of urea powder (ratio: 1.5:1) into the fertilizer tube with a diameter of 8mm and a closed bottom, and tap the tube to make the biochar The powder is in uniform contact with urea, and then the fertilizer tube is transferred to a vacuum oven, and the temperature is adjusted to 135°C. After preheating for 5 minutes, the temperature is raised to 140°C, 145°C, 150°C and 155°C respectively, and the reaction is 30, 25, and 20°C respectively. , Take it out after 15 minutes, cool it under the action of air at 25°C for 5 seconds and take it out to obtain biochar-based urea fertilizers with different melting reaction temperatures.

[0041] The above-mentioned biochar-based urea fertilizer was tested for compressive strength, and the compressive strengths were 72.91N, 207.5N, 98.45N and 86.67N, respectively.

Embodiment 2

[0043] Weigh 0.3g of biochar powder and 0.2g of urea powder (ratio: 1.5:1) with particle sizes of 0.125-0.18mm, 0.10-0.125mm and 0.075-0.1mm, respectively, and add them to the fertilization tube with a diameter of 8mm. In the fertilization tube with a closed bottom, tap the fertilization tube to make the biochar powder and urea evenly contact, then transfer the fertilization tube to a vacuum oven, adjust the temperature to 135°C, and raise the temperature to 155°C after preheating for 5 minutes. Take it out after 15 minutes, cool it under the action of air at 25°C for 5 seconds and take it out to obtain biochar-based urea fertilizers with different particle sizes of biochar powder.

[0044] The above-mentioned biochar-based urea fertilizer was tested for compressive strength, and the compressive strengths were 73.23N, 93.52N and 86.67N, respectively.

Embodiment 3

[0046] Weigh 0.3g of biochar powder with a particle size of 0.075-0.1mm, and 0.2g of urea powder (ratio: 1.5:1) into the fertilization tubes with diameters of 6mm, 8mm, 10mm, and 12mm, respectively, and the bottom is closed. Tap the fertilizer tube to make the biochar powder and urea contact evenly, then transfer the fertilizer tube to a vacuum oven, adjust the temperature to 135°C, preheat for 5 minutes and raise the temperature to 155°C respectively, take it out after 15 minutes of reaction, and put it at 25°C Cool for 5 seconds under the action of air and take it out to obtain biochar-based urea fertilizers with different particle diameters.

[0047] The above-mentioned biochar-based urea fertilizer was tested for compressive strength, and the compressive strengths were 55.61N, 86.67N, 97.47N and 89.75N, respectively.

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Abstract

The invention discloses a method for fertilizing biochar-based urea fertilizer by infiltration and fusion. The method includes the following steps: raw material preparation; biochar and urea melting and infiltration; rapid cooling to fertilize; the main fertilization process is to preheat the urea powder and the biochar powder, and control the temperature of the two systems to reach the melting temperature of urea to realize the melting of urea Complete infiltration and fusion of biochar powder, and finally cooling to obtain biochar-based urea fertilizer. This method can adapt to different types of biochar, easy to adjust and control the ratio, high carbon fertilizer molding rate, moderate mechanical strength, high stability, easy to combine with the existing urea production process to achieve in-situ molding, and has a certain industrial basis for popularization and application ,bright future. The present invention can be well combined with the existing urea molding device in situ during the preparation process, the molding time is short, the efficiency is high, the moisture content of the product obtained after molding is small, the particle size of the obtained product can be easily adjusted, and the product strength is high. All above 50N.

Description

technical field [0001] The invention belongs to the field of biomass resource utilization / fertilizer technology, and in particular relates to a biochar-based urea fertilizer fertilization method through osmosis fusion. Background technique [0002] my country is a big consumer of chemical fertilizers. The total amount of fertilizer application is close to 1 / 3 of the world's total, but the utilization efficiency is only 33%. About 174,000 tons of nitrogen fertilizer applied to grain and vegetable crops are directly lost every year. Excessive and Nutrient loss caused by irrational application of chemical fertilizers has become one of the most important sources of agricultural non-point source pollution in China at this stage. Biochar has developed pore structure, large specific surface area and rich oxygen-containing active groups. When applied together with agricultural chemical fertilizers, it can not only improve the utilization efficiency of fertilizers, improve crop nutrit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/80C05G3/40
Inventor 王明峰蒋恩臣任永志吕娟许细薇钟旋吴宇健
Owner SOUTH CHINA AGRI UNIV
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