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Preparation method of straw biomass charcoal coated slow release fertilizer

A technology of biomass charcoal and slow-release fertilizer, which is applied in the field of comprehensive utilization of natural plant fibers, can solve problems such as pollution of slow-release materials, and achieve the effects of enhancing pore structure, increasing cation exchange capacity, and increasing carbonization rate.

Inactive Publication Date: 2017-11-17
安徽华联肥业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a preparation method of straw biomass charcoal-wrapped slow-release fertilizer, which can effectively solve the problem of straw disposal and slow-release material pollution, and has the advantages of reasonable economy, simple operation, environmental protection and energy saving

Method used

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Embodiment Construction

[0022] A preparation method of straw biochar-wrapped slow-release fertilizer, comprising the following specific steps:

[0023] (1) Preprocessing:

[0024] Put 30 parts by weight of cut crop stalks with a length of 1-3 cm and soak them in 2wt% NaOH solution for 2 hours, then take them out and wash them with distilled water until they are neutral, remove the wax and other attached impurities on the surface of the stalks, and place them in Dry in an oven at 85°C, pulverize and pass through a 100-mesh sieve, store in a desiccator, and set aside;

[0025] (2) Put 9 parts of sludge to air-dry under natural conditions, then move to an oven, dry at 85°C until constant weight, grind out particles with a particle size of 1-3mm, and set aside;

[0026] (3) Carbonization treatment:

[0027] Mix the above-mentioned pretreated crop straw with the sludge particles in step (2), put it into a tube furnace for carbonization, feed the carrier gas, adjust the gas flow rate through the rotamete...

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Abstract

The invention discloses a preparation method of a straw biomass charcoal coated slow release fertilizer. A small amount of sludge is added to straws, and volatile gases in the sludge escape with the rising of the temperature, so the sludge plays a role in etching to form active carbon having a porous structure, thereby the specific surface area and the volumetric ratio of straw charcoal are increased, and the physical adsorption performance of the charcoal material are improved; the quantity of -OH and -CHO functional groups on the surface of the prepared charcoal is greatly improved, and the surface is partially slightly oxidized after the slow release fertilizer prepared by using the charcoal as a film material exists in soil for a certain time in order to form carbonyl groups and phenolic groups, so the increase of the cation exchange capacity of the soil is facilitated, and the soil has strong adsorption to NH<4><+> and NO<3><->, thereby the nitrogen element in the soil is conserved, the volatilization of ammonia in farmland soil is effectively reduced, and the raining loss of nitrogen nutrients in the soil is effectively controlled.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of natural plant fibers, in particular to a preparation method of straw biomass charcoal-wrapped slow-release fertilizer. Background technique [0002] Compared with traditional fertilizers, coated slow-release fertilizers can effectively reduce the loss of soil nitrogen nutrients. However, most of the coating materials are high molecular polymers at present, which are difficult to degrade and easy to accumulate. Long-term use can easily damage the soil structure. Therefore, seeking new slow-release coating materials and preparing environment-friendly slow-release fertilizers are currently research hotspots in this field. [0003] Crop stalks are crop residues with high fiber content left after the seeds are harvested, including cereals, beans, potatoes, oilseeds, hemp, and cotton, sugarcane, tobacco, melons and other crops. straw. Our country is very rich in straw resources. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/08C05G3/04C05G3/00C01B32/324C05G3/80C05G3/90
CPCC05C9/00C05G3/00C05G3/80C05G3/90C05G5/12C05G5/30C05D9/00Y02A40/22Y02P60/21
Inventor 刘文成
Owner 安徽华联肥业有限公司
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