Method for producing charcoal fertilizer

A production method and biochar technology, which are applied in the field of biomass resource utilization, can solve the problems of insufficient fertilizer efficiency of traditional biochar and difficulty in handling human and animal manure, and achieve global climate change improvement, avoid environmental and health problems, and achieve significant economic benefits. Effect

Inactive Publication Date: 2013-09-04
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to use activators to enhance the microporous performance and fertilizer efficiency of traditional bioc

Method used

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  • Method for producing charcoal fertilizer

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Experimental program
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Effect test

Embodiment approach 1

[0022] Add 1 part of human and animal manure, 3 parts of sawdust and activator according to 10% of the total mass, stir and mix thoroughly to obtain mixture 1; use wind energy and solar energy to reduce the moisture content of mixture 1 to 25%, and obtain mixture 2; mix 2 Put it into the material bin of the carbonization furnace, the filling rate of the material bin is 85%; heat the material bin to 175°C for 25 minutes, during this process, the residual air and water vapor in the material bin are discharged through the exhaust port, and after energy recovery , and the obtained waste liquid is discharged into the sewage treatment system. A small amount of water vapor remains in the material bin. Raise the temperature of the material bin to 450°C at a heating rate of 15°C / min and continue for 1 hour to complete the carbonization of the material. This process will generate a large amount of combustible gas. Before the heating starts, turn the exhaust port valve to the gas boiler...

Embodiment approach 2

[0024] Add 2 parts of human and animal feces, 1 part of wood chips and 5% of the total mass into the activator, stir and mix thoroughly to obtain mixture 3; use wind and solar energy to reduce the moisture content of mixture 1 to 30%, and obtain mixture 4; mix 4 Put it into the material bin of the carbonization furnace, and the filling rate of the material bin is 90%. Heat the material bin to 200°C for 30 minutes. During this process, the residual air and water vapor in the material bin are discharged through the exhaust port. After energy recovery, the obtained waste liquid is discharged into the sewage treatment system. A small amount of water vapor remains in the material bin. Raise the temperature of the material bin to 550°C at a heating rate of 10°C / min and continue for 2 hours to complete the carbonization of the material. This process will generate a large amount of combustible gas. Before the heating starts, turn the exhaust port valve to the gas boiler, and the ener...

Embodiment approach 3

[0026] Add 1 part of human and animal manure, 1 part of sawdust and activator according to 5% of the total mass, stir and mix thoroughly to obtain mixture 5; use wind and solar energy to reduce the moisture content of mixture 1 to 20%, and obtain mixture 6; mix 6 Put it into the material bin of the carbonization furnace, and the filling rate of the material bin is 90%. Heat the material bin to 150°C for 30 minutes. During this process, the residual air and water vapor in the material bin are discharged through the exhaust port. After energy recovery, the obtained waste liquid is discharged into the sewage treatment system. A small amount of water vapor remains in the material bin. Raise the temperature of the material bin to 450°C at a heating rate of 25°C / min and continue for 1.5 hours to complete the carbonization of the material. This process will generate a large amount of combustible gas. Before the heating starts, turn the exhaust port valve to the gas boiler, and the e...

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Abstract

The invention belongs to the field of resource utilization of biomass, particularly relates to a method for producing a charcoal fertilizer by using an activating agent on the basis of human and animal excreta and forestry and agricultural residues, and aims to enhance the cellular performance and fertilizer efficiency of the charcoal fertilizer through the activating agent and overcome the defects that the human and animal excreta is difficult to process and conventional charcoal has insufficient fertilizer efficiency. The method comprises the steps as follows: the human and animal excreta, ground forestry and agricultural by-products and the activating agent are mixed uniformly according to a certain proportion; moisture content of a material is reduced to 30% below by using solar energy, wind energy or bioenergy; a mixture is placed in a pyrolysis material bin and then heated to the temperature of 150-200 DEG C, so that further dehydration is performed, and residual air in the material bin is removed; the material is carbonized at the temperature of 450-550 DEG C; and cooling is performed, so that a charcoal fertilizer product can be obtained. According to the method, compared with a charcoal fertilizer which is prepared without addition of the activating agent, cellular structures are increased by more than 25%, and the total amount of phosphorus and potassium which can be used by plants is increased by more than 20%.

Description

technical field [0001] The invention belongs to the field of resource utilization of biomass, and in particular relates to a method for using an activator to strengthen the preparation of biochar fertilizer based on human and animal manure and agricultural and forestry waste. Background technique [0002] Biochar (biochar) is a kind of highly aromatic and insoluble solid substance produced by pyrolysis and carbonization of biomass under complete or partial anoxic conditions. Biochar mostly has a loose microporous structure. Based on this, in recent years, the application of biochar in agriculture as a soil improver and fertilizer slow-release carrier has attracted more and more attention. Common biochars include straw charcoal, coconut shell charcoal, charcoal, bamboo charcoal, etc. There are also many patented inventions in China that use the pyrolysis of agricultural and forestry by-products to obtain biomass, such as the Shanghai University patent "biochar preparation me...

Claims

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Application Information

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IPC IPC(8): C05F15/00
CPCY02P20/133
Inventor 李子富刘璇张扬周晓琴尹福斌白晓凤程世昆
Owner UNIV OF SCI & TECH BEIJING
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