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Garden rubbish utilization method based on hydrothermal carbonization and solid biomass fuel

A technology for solid biomass and garden waste, applied in solid fuels, biofuels, waste fuels, etc., can solve problems such as complex composition and air pollution, and achieve the effects of reduced water absorption, less secondary pollution, and increased ion volume

Inactive Publication Date: 2016-09-21
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because garden waste contains plant branches, leaves, grass clippings, etc., its composition is relatively complex; generally speaking, garden waste contains water, non-combustible substances and alkali metals; direct incineration of garden waste will also produce a lot of smoke and dust, resulting in atmospheric pollution. Pollution

Method used

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  • Garden rubbish utilization method based on hydrothermal carbonization and solid biomass fuel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) With quality 50g, the garden refuse of moisture content 25wt%, carries out simple screening earlier, separates the incombustible material such as small stone. Then crush the branches, bark, etc. into small particles of garbage, mix them with 1L of water and add them to the hydrothermal reactor. Hydrothermal carbonization products can be obtained under certain conditions.

[0030] (2) Filter and separate the product, the main component of the liquid by-product is light oil, and the solid product is hydrothermal biochar, add dichloromethane to the liquid product, and release the light yellow liquid layer extracted by dichloromethane with a solid-liquid separator , and the light oil is separated by a rotary evaporator at 45°C, and the dichloromethane is recovered, and then the solid product is dried to obtain 25.5g, a high calorific value of about 24000J / g, and a water content of Approximately 5.16% hydrothermal biochar.

[0031] (3) The crushed and dried garden wast...

Embodiment 2

[0033] (1) With quality 50g, the garden refuse of moisture content 25wt%, carries out simple screening earlier, separates the incombustible material such as small stone. Then crush the branches, bark, etc. into small particles of garbage, mix them with 1L of water and add them to the hydrothermal reactor. Before the reaction, nitrogen is introduced into the hydrothermal reactor. Hydrothermal carbonization products can be obtained under certain conditions.

[0034] (2) The product is filtered and separated. The main component of the liquid by-product is light oil, and the solid product is hydrothermal biochar. Dichloromethane is added to the liquid by-product, and the light yellow liquid extracted by dichloromethane is released with a solid-liquid separator. Layer, and the light oil is separated by a rotary evaporator at 45°C, and the dichloromethane is recovered, and then the solid product is dried to obtain 23.18g, with a high calorific value of about 25600J / g, containing wat...

Embodiment 3

[0037] (1) With quality 50g, the garden refuse of moisture content 25wt%, carries out simple screening earlier, separates the incombustible material such as small stone. Then crush the branches, bark, etc. into small particles of garbage, mix them with 1L of water and add them to the hydrothermal reactor. Hydrothermal carbonization products can be obtained under certain conditions.

[0038](2) The product is filtered and separated, the liquid by-product is mainly light oil, the solid product is hydrothermal biochar, and dichloromethane is added to the liquid product, and the light yellow liquid layer extracted by dichloromethane is released with a solid-liquid separator, And the light oil is separated by a rotary evaporator at 45°C, and the dichloromethane is recovered, and then the solid product is dried to obtain 30.3g, a high calorific value of about 22200J / g, and a water content of about 6.32% hydrothermal biochar.

[0039] (3) The crushed and dried garden waste and hydr...

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Abstract

The invention discloses a garden rubbish utilization method based on hydrothermal carbonization and solid biomass fuel. Through hydrothermal treatment of garden rubbish, solid products (hydrothermal biochar powder) and liquid byproducts (with light oil as a main ingredient) are utilized respectively, wherein the solid products are conveniently transported and stored for a long distance because of high heat value, good burning performance and low water content and then are mixed with crushed and dried garden rubbish in the proportion being 7:3, and the solid formed biomass fuel is prepared after compacting. The liquid byproducts are subjected to methylene dichloride extraction and rotary evaporation, and light oil is obtained. Both the solid products and the liquid byproducts of the garden rubbish can be used, so that the utilization efficiency of the garden rubbish is improved, resource waste is avoided, secondary pollution is small, the whole technological process is simple, the reaction conditions are relatively mild, the operation cost is low, and the solid biomass fuel has certain social meaning and higher economic value.

Description

technical field [0001] The invention relates to garden garbage recycling, in particular to a hydrothermal carbonization-based garden garbage utilization method and solid biomass fuel. Background technique [0002] The so-called garden waste (Garden Waste), also known as green waste, mainly refers to the dead branches, fallen leaves, grass clippings, fallen flowers, tree and shrub pruning and other plant residues produced by the natural fall of garden plants or artificial pruning. These landscaping wastes are different from daily life, medical, industrial production and other wastes because they are rich in organic matter and nutrients; therefore, the reuse of landscaping waste resources has become an important ecological and economic value in any country. important concern. [0003] With the acceleration of urbanization in our country, landscaping has been paid more and more attention to by people because of its special role in improving urban environmental quality, allevia...

Claims

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Application Information

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IPC IPC(8): C10L5/44
CPCY02E50/10Y02E50/30C10L5/447C10L5/442C10L2290/146
Inventor 马晓茜姚忠良林有胜
Owner SOUTH CHINA UNIV OF TECH
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