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Straw biomass charcoal-based urea and preparation method thereof

A technology of straw biomass charcoal and urea, applied in the field of urea, can solve problems such as no research reports on the utilization of straw biomass charcoal and urea, and achieve the effects of good social and economic benefits, reduced production costs, and high dispersibility.

Inactive Publication Date: 2015-08-12
GUANGDONG DAZHONG AGRI SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, there are no research reports on the use of rice straw biochar and urea

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] A preparation method of rice straw biomass carbon-based urea, comprising the following steps:

[0063] (1) Pyrolysis of straw to obtain straw biochar and combustible gas;

[0064] (2) Mix the raw material of urea with rice straw biomass charcoal accounting for 12% of the total raw material weight of urea, melt and granulate, and collect the pellets; wherein, the heat required for melting is provided by the combustion of the combustible gas;

[0065] The urea includes the following raw materials in parts by weight: 40 parts of granular urea, 0.5 part of urea synergist, 0.08 part of urea anti-caking agent, and 0.5 part of urea modifier;

[0066] (3) Cool the collected pellets under negative pressure for screening;

[0067] (4) Coat the screened pellets, pack and ship, and prepare rice straw biomass carbon-based urea.

[0068] The step (1) specifically includes: crushing the rice straw to a particle size of 1mm, drying the crushed rice straw until the water content is less...

Embodiment 2

[0079] A preparation method of rice straw biomass carbon-based urea, comprising the following steps:

[0080] (1) Pyrolysis of straw to obtain straw biochar and combustible gas;

[0081] (2) Mix the raw material of urea with rice straw biomass charcoal accounting for 13% of the total raw material weight of urea, melt and granulate, and collect the pellets; wherein, the heat required for melting is provided by the combustion of the combustible gas;

[0082] The urea includes the following raw materials in parts by weight: 50 parts of granular urea, 0.7 part of urea synergist, 0.09 part of urea anti-caking agent, and 0.7 part of urea modifier;

[0083] (3) Cool the collected pellets under negative pressure for screening;

[0084] (4) Coat the screened pellets, pack and ship, and prepare rice straw biomass carbon-based urea.

[0085] The step (1) specifically includes: crushing the rice straw to a particle size of 1.2mm, drying the crushed rice straw until the water content is ...

Embodiment 3

[0096] A preparation method of rice straw biomass carbon-based urea, comprising the following steps:

[0097] (1) Pyrolysis of straw to obtain straw biochar and combustible gas;

[0098] (2) Mix the raw material of urea with rice straw biomass charcoal accounting for 14% of the total raw material weight of urea, melt and granulate, and collect the pellets; wherein, the heat required for melting is provided by the combustion of the combustible gas;

[0099] The urea includes the following raw materials in parts by weight: 60 parts of granular urea, 1 part of urea synergist, 0.1 part of urea anti-caking agent, and 0.1 part of urea modifier;

[0100] (3) Cool the collected pellets under negative pressure for screening;

[0101] (4) Coat the screened pellets, pack and ship, and prepare rice straw biomass carbon-based urea.

[0102] The step (1) specifically includes: crushing the rice straw to a particle size of 1.5mm, drying the crushed rice straw until the moisture content is ...

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Abstract

The invention belongs to the technical field of urea, and specifically relates to straw biomass charcoal-based urea and a preparation method thereof. The preparation method comprises following steps: straw is subjected to high temperature pyrolyzing so as to obtain straw biomass charcoal and combustible gas; an urea raw material is mixed with the straw biomass charcoal, wherein the weight amount of the straw biomass charcoal accounts for 12 to 16% of the weight amount of the urea raw material; an obtained mixture is subjected to melting and pelleting, and a pellet material is collected; the pellet material is subjected to vacuum sealed cooling and screening; and then an obtained product is coated with films, is packaged, and is discharged so as to obtain the straw biomass charcoal-based urea. The straw biomass charcoal-based urea is abundant in nutrients; nutrient releasing is coordinating and long lasting; fertilizer nutrient utilization rate is high; soil improvement and soil fertilizing can be realized effectively; fertilizer utilization rate is increased; soil organic matter content is increased; soil bulk density is recued; soil water and nutrient retention capacity is improved; crop growth is promoted; crop yield is increased greatly; crop quality is improved; and economic benefits are excellent.

Description

technical field [0001] The invention relates to the technical field of urea, in particular to straw biomass carbon-based urea and a preparation method thereof. Background technique [0002] Fertilization has become one of the indispensable technical measures of agricultural production, contributing more than half of crop production. The utilization rate of fertilizers in China has always been relatively low. For example, the average utilization rate of nitrogen fertilizers for current crops is only about 30%, which is nearly 20 percentage points lower than that of developed countries. This is due to the unscientific fertilization methods on the one hand, and the fertilizer itself on the other hand. characteristics. It is urgent to improve fertilizer utilization efficiency, and research and development of new multifunctional fertilizers is one of the important ways to improve fertilizer utilization efficiency. [0003] Biochar is a solid product of high-temperature pyrolysi...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/04C05G3/08C01B31/12C05G3/80C05G3/90
CPCY02A40/22Y02P60/21
Inventor 林小明
Owner GUANGDONG DAZHONG AGRI SCI CO LTD
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