Lignin plastified adhesive biological carbon-base urea and preparation method thereof

A technology based on urea and biochar, applied in fertilizer mixtures, fertilization devices, applications, etc., can solve the problems of increasing the cost of fertilization operations, excessive loss and waste of fertilizers, and low utilization efficiency of fertilizers, and achieve enhanced water retention, heat preservation, fertilizer retention and ventilation capabilities , light environmental pollution and low production cost

Inactive Publication Date: 2014-07-02
NORTHEAST AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the extensive use of chemical fertilizers not only causes environmental pollution, but also has low utilization efficiency of chemical fertilizers and a lot of waste of chemical fertilizers, which increases the cost of fertilization operations. Taking urea as an example, its utilization rate is only 30-60%

Method used

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  • Lignin plastified adhesive biological carbon-base urea and preparation method thereof
  • Lignin plastified adhesive biological carbon-base urea and preparation method thereof
  • Lignin plastified adhesive biological carbon-base urea and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0013] Crush corn stalks and carbonize them at a low temperature of 400°C to obtain pyrolyzed biomass charcoal; combine 70 kg of corn stalk pyrolyzed biomass charcoal with 23 kg of urea with a nitrogen content of 46%, moisture content of 1%, and alkali lignin content of 90 %, PH value 6.6, moisture 2%, ash content 5%, 7 kg of alkali lignin is uniformly mixed, 10 kg of water is added, sealed and heated at 60°C for 10 minutes to obtain the raw material, the raw material is put into a mold and pressure-molded, and formed The final lignin plasticized and bonded biomass carbon-based urea was dried at 45° C. for 2 hours to obtain a finished product.

Embodiment 2

[0015] The wheat straw is pulverized and then carbonized at a low temperature of 400°C to obtain pyrolyzed biochar; 55 kg of wheat straw pyrolyzed biochar is mixed with 40 kg of urea with a nitrogen content of 50%, a water content of 0.8%, and an alkali lignin content of 92 %, PH value 6.8, moisture 1.5%, ash content 4% and 5 kg of alkali lignin are uniformly mixed, 10 kg of water is added, sealed and heated at 60 ° C for 5 minutes to obtain raw materials, and the raw materials are put into molds and pressure-molded to form The final lignin plasticized and bonded biomass carbon-based urea was dried at 45° C. for 2 hours to obtain a finished product.

Embodiment 3

[0017] The rice straw is pulverized and carbonized at a low temperature of 400°C to obtain pyrolyzed biochar; 62 kg of rice straw pyrolyzed biochar is mixed with 34 kg of urea and alkali lignin with a nitrogen content of 55% and a moisture content of 0.7%. 4 kg of alkali lignin with 94%, PH value of 7, moisture of 1.8%, and ash content of 3.5% is evenly mixed, and 10 kg of water is added, sealed and heated at 60°C for 7 minutes to obtain the raw material, which is put into a mold and pressure-molded. The molded lignin plasticized and bonded biomass carbon-based urea was dried at 45° C. for 2 hours to obtain a finished product.

[0018] Proved through a large amount of scientific research experiments, the present invention has obvious, outstanding technical effect: 1, the raising of nitrogen fertilizer utilization rate: the application of lignin plasticized and bonded biomass charcoal-based urea is compared with the application amount of equal urea, the nitrogen fertilizer The ...

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Abstract

The invention relates to a lignin plastified adhesive biological carbon-base urea and a preparation method thereof, belonging to the an agricultural biomass fertilizer and a preparation technique thereof. The biological carbon-base urea is composed of pyrolytic biomass carbon, urea and alkali lignin in different weight ratios. The preparation method comprises the following steps: pulverizing crop waste, pyrolyzing to perform carbonizing treatment to obtain the pyrolytic biomass carbon, uniformly mixing the pyrolytic biomass carbon with the urea and alkali lignin, adding 100 wt% of water, heating at 60 DEG C in a sealed environment for 5-10 minutes to obtain a raw material, adding the raw material into a mold, carrying out pressure forming, and drying the formed lignin plastified adhesive biological carbon-base urea at 45 DEG C for 2 hours to obtain the finished product. The lignin plastified adhesive biological carbon-base urea has novel, reasonable an simple components; and the manufacturing technique is simple and easy to implement, and has the advantages of low production cost, high utilization ratio of fertilizer, long fertilizer effect time and low environmental pollution.

Description

technical field [0001] The invention belongs to agricultural biomass fertilizer and its preparation technology, and mainly relates to pyrolysis biochar-based urea and its preparation method. Background technique [0002] my country is a large agricultural country with a large population, and food security is related to national economy, people's livelihood and social security and stability. In order to ensure and increase grain output per unit area, the use of chemical fertilizers has become an important technical means. However, the extensive use of chemical fertilizers not only causes environmental pollution, but also has low utilization efficiency of chemical fertilizers and a lot of loss and waste of chemical fertilizers, which increases the cost of fertilization operations. Taking urea as an example, its utilization rate is only 30-60%. Therefore, it is imminent to develop a new type of biomass fertilizer with high fertilizer utilization rate and light environmental po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
Inventor 秦丽元蒋恩臣王秋静张伟韩平赵晨希罗立娜
Owner NORTHEAST AGRICULTURAL UNIVERSITY
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