Method for producing biocarbon-based slow-release nitrogen fertilizer

A production method and biochar technology, applied in fertilization devices, fertilizer mixtures, agricultural gas emission reduction, etc., can solve the problems of no market, easy loss of ammonium nitrate, etc., to reduce nutrient loss, facilitate fertilization, and reduce greenhouse gas emissions Effect

Inactive Publication Date: 2012-04-25
NORTHWEST A & F UNIV
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Problems solved by technology

[0004] Among nitrogen fertilizers, urea-ammonium nitrate is a good liquid nitrogen fertilizer, its nutrient content is between 28-32%, and it is also a nitrogen fertilizer with simple manufacturing process. It contains nitrate nitrogen, ammonium nitrogen and amide nitrogen. A nitrogen fertilizer containing quick-acting and slow-acting chemical forms of nitrogen has good fertilizer performance and occupies a large market share in North America and Western Europe. However, due to the limitations of storage, transportation pipelines and fertilization machinery, urea-ammonium nitrate liquid fertilizer is almost in China. no market
Ammonium nitrate is also a nitrogen fertilizer with good water solubility and quick effect, but ammonium nitrate is easily lost in the soil

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  • Method for producing biocarbon-based slow-release nitrogen fertilizer

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Embodiment 1

[0031] 1） Or the solid by-products of waste biomass thermal cracking or gasification plant thermal cracking or gasification of apple tree waste branches and wood chips or corn stalks - biochar or biochar, the physical form is black powdery particles, if it is in the form of rods or Lumpy, use a pulverizer to crush it into particles that pass through a 3mm sieve.

[0032] 2) Agricultural ammonium nitrate fertilizer, containing at least 34% nitrogen, add 200 parts of agricultural ammonium nitrate to every 100 parts of 80 ℃ hot water, stir while heating (intermittent process or continuous process) to completely dissolve ammonium nitrate in water, form 22.67% N ammonium nitrate solution, the ammonium nitrate solution is stored for later use or enters the next process.

[0033] 3) Add 63-82 parts of the ammonium nitrate solution in process 2 to every 100 parts of apple tree waste wood chip charcoal or corn stalk biochar in process 1, and add while stirring. In the batch production...

Embodiment 2

[0038]1) Solid by-products from thermal cracking of biomass or waste biomass or gasification plant pyrolysis or gasification of waste branches of apple trees or corn stalks - biochar or biochar, the physical form is black powdery particles , If it is in the form of a stick or block, use a pulverizer to crush it into particles that pass through a 2mm sieve.

[0039] 2) Ammonium nitrate and urea fertilizers come from commercial agricultural ammonium nitrate and urea in the market. The nitrogen content of ammonium nitrate is more than 34%, and the nitrogen content of urea is at least 46%. Add 40 parts of ammonium nitrate and 30 parts of urea to every 30 parts of hot water heated to 80°C, stir and dissolve to form a 28% N urea-ammonium nitrate solution, which is ready for use or transported to the next process.

[0040] 3) Mix 48 parts of the urea-ammonium nitrate solution in process 2 with 100 parts of apple tree waste wood chips or corn stalk biochar, and stir thoroughly. In the...

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Abstract

The invention discloses a method for producing a biocarbon-based slow-release nitrogen fertilizer, which is characterized by comprising the following steps: thermal cracking or gasifying corn straw, or apple tree waste branch, trunk and wood chip to obtain the biocarbon; mixing the biocarbon and an ammonium nitrate solution, or urea and the ammonium nitrate solution, fully stirring and drying, or adding a binder with 1-3% of total amount and sending to a granulation system for granulation, then drying to obtain the biocarbon-based slow-release nitrogen fertilizer product. The fertilizer has the advantages of simple and easy preparation technology, and low cost. The biocarbon-based slow-release nitrogen fertilizer contains 10-12% of nitrogen, the biocarbon carrier material is stable in soil, and is a good soil amendment and a carbon sequestration agent, soil is applied for improving soil fertilization, the nitrogen element of the nitrogenous fertilizer loaded by the biocarbon has slow-release effect, so that the loss of the nitrogen element can be reduced, the nitrogenous fertilizer utilization rate can be enhanced; the biocarbon can retain in soil for long-term to play the effects of carbon sequestration and carbon emission reduction, the biocarbon is helpful for alleviating climate warming, and biocarbon-based slow-release nitrogen fertilizer is a green fertilizer.

Description

technical field [0001] The invention belongs to the field of resource utilization of waste biomass, chemical fertilizers and soil improvers, and is a composite technology of chemical fertilizers and biochar materials, and in particular relates to a biochar in which chemical nitrogen fertilizers and biochar materials are compounded and integrated through a physical and chemical adsorption process Production method of base slow-release nitrogen fertilizer. Background technique [0002] Biochar is a newly coined word, translated from English bio-charcoal, and also translated as biomass charcoal or biomass coke. Biochar is a solid product of biomass (mainly waste biomass, biomass is a general term for biological organic materials) thermochemical (including pyrolysis and gasification) conversion under anoxic or micro-oxygen conditions, mainly used for agricultural and forestry soil improvement Powdered granular carbon, which is similar to traditional charcoal, bamboo charcoal a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/08C05G3/90
CPCY02A40/22Y02P60/21
Inventor 何绪生耿增超高海英张保健佘雕
Owner NORTHWEST A & F UNIV
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