Method for preparing charcoal-based fertilizer by rice husk gasification

A gasification method, rice husk technology, applied in the direction of phosphate fertilizer, fertilization device, fertilizer mixture, etc., can solve problems such as plant diseases and insect pests, environmental pollution, etc., achieve the effects of slowing down global warming, reducing air pollution, and improving fertilizer efficiency

Inactive Publication Date: 2019-11-01
江西省食品发酵研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects in the prior art, the present invention provides a method for preparing biochar-based fertilizer by gasification of rice husks, so as to solve the problems of environmental pollution, diseases and insect pests caused by direct return of rice husks to the field, realize waste recycling, and save resources

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0053] One aspect of this embodiment provides a method for preparing biochar-based fertilizers by gasification of rice husks. The method for preparing biochar-based fertilizers by gasification of rice husks includes the following steps:

[0054]1. Crush the rice husk into 5-7cm, put the crushed rice husk into the biomass gasification furnace for anaerobic high-temperature pyrolysis, control the temperature of the carbonization layer at 400°C, and put the combustible gas out of the biomass gasification furnace Control the temperature at 200-300°C, crack for 6 hours, and make rice husk biochar;

[0055] 2. Pulverize attapulgite, bentonite and rice husk biochar respectively, pass attapulgite and bentonite through a 80-mesh sieve, and pass through a 60-mesh sieve for rice husk biochar;

[0056] 3. 18 parts by weight of ammonium phosphate, 7 parts by weight of urea, 9 parts by weight of potassium chloride, 1 part by weight of zinc sulfate, 2 parts by weight of ammonium bicarbonate,...

Embodiment 2

[0072] One aspect of this embodiment provides a method for preparing biochar-based fertilizers by gasification of rice husks. The method for preparing biochar-based fertilizers by gasification of rice husks includes the following steps:

[0073] S1. Crush the rice husks into 5-7cm, put the crushed rice husks into the biomass gasification furnace for anaerobic high-temperature pyrolysis, control the temperature of the carbonization layer at 400°C, and put the combustible gas out of the biomass gasification furnace Control the temperature at 200-300°C, crack for 3-6 hours, and make rice husk biochar;

[0074] S2. Pulverize attapulgite, bentonite and rice husk biochar respectively, pass attapulgite and bentonite through a 80-mesh sieve, and pass through a 60-mesh sieve for rice husk biochar;

[0075] S3. 16 parts by weight of ammonium phosphate, 11 parts by weight of urea, 3 parts by weight of potassium chloride, 2 parts by weight of zinc sulfate, 1 part by weight of ammonium bic...

Embodiment 3

[0091] One aspect of this embodiment provides a method for preparing biochar-based fertilizers by gasification of rice husks. The method for preparing biochar-based fertilizers with rice husks includes the following steps:

[0092] S1. Crush the rice husks into 5-7cm, put the crushed rice husks into the biomass gasification furnace for anaerobic high-temperature pyrolysis, control the temperature of the carbonization layer at 400°C, and put the combustible gas out of the biomass gasification furnace Control the temperature at 200-300°C, crack for 3-6 hours, and make rice husk biochar;

[0093] S2. Pulverize attapulgite, bentonite and rice husk biochar respectively, pass attapulgite and bentonite through a 80-mesh sieve, and pass through a 60-mesh sieve for rice husk biochar;

[0094] S3. 17 parts by weight of ammonium phosphate, 9 parts by weight of urea, 6 parts by weight of potassium chloride, 1 part by weight of zinc sulfate, 1 part by weight of ammonium bicarbonate, 6 part...

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Abstract

The invention belongs to the technical field of biological fertilizers, and provides a method for preparing a charcoal-based fertilizer by rice husk gasification. The method includes firstly crushingrice husks; performing oxygen-free high-temperature thermal cracking in a biomass gasification furnace for 3-6 h to obtain rich husk charcoal, with the temperature of a carbonization layer being controlled to be 400 DEG C, and the temperature at a combustible gas outlet of the furnace being controlled to be 200-300 DEG C; separately crushing attapulgite, bentonite and the rice husk charcoal; mixing and stirring ammonium phosphate, urea, potassium chloride, zinc sulfate, ammonium bicarbonate, nitro humic acid, the rice husk charcoal, the attapulgite and the bentonite to obtain a fertilizer mixture; subjecting the mixture to primary granulation with a rotary drum granulator; then performing shaping and granulation with a disk granulator to obtain fertilizer granules; drying the fertilizer granules with a dryer to obtain the charcoal-based fertilizer. The method solves a problem that direct return of rice husks to the field causes environment pollution, disease and pest harms and the like, and the method achieves reutilization of a waste material and saves resources.

Description

technical field [0001] The invention belongs to the technical field of biological fertilizers, and in particular relates to a method for preparing biochar-based fertilizers by gasification of rice husks. Background technique [0002] my country is a large agricultural country and one of the countries with the richest rice resources. As one of the three major food crops, rice has an annual output of about 250 million tons of by-product rice husks, accounting for as much as 30% of the total rice husks of various crops, ranking second only to the United States in the world. [0003] The output of rice husk is so abundant, but it has not been rationally and effectively utilized all the time. In the past, the way people dealt with rice husks was that a small part was used as heating and cooking materials or as roughage for ruminants, and most of them were discarded or burned on the spot. Life and property are threatened. In addition, returning rice husks to the fields will nat...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/04
CPCC05B7/00C05D9/00C05G3/00
Inventor 李琎杰
Owner 江西省食品发酵研究所
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