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Preparation method and application of garden-waste biomass charcoal

A technology for garden waste and biomass charcoal, which is applied in the field of biomass charcoal preparation, can solve the problem of undeveloped recycling of garden waste, and achieve the effects of loose structure, good pore structure and large specific surface area.

Inactive Publication Date: 2018-12-14
XIAN UNVERSITY OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the shortcoming of resource utilization of garden wastes in the prior art and to propose a method for preparing biochar from garden wastes and its application

Method used

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  • Preparation method and application of garden-waste biomass charcoal
  • Preparation method and application of garden-waste biomass charcoal
  • Preparation method and application of garden-waste biomass charcoal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0021] Embodiment: A preparation method of garden waste biomass charcoal includes the following steps:

[0022] S1. Screening garden wastes, screening out herb garden wastes and woody garden wastes, and reserve herb garden wastes and woody garden wastes;

[0023] S2. After drying the herb garden waste at 90°C for 10 hours (the moisture content of the herb garden waste after drying is less than 5%), use a crusher to crush the dried herb garden waste into powder, and Filter the powder through an 80-mesh sieve to obtain a sieved product, and then send the unsieved powder to the crusher for pulverization until all the powder passes through the sieve, and the powder is ready for use;

[0024] S3. After soaking and drying the powder and woody garden waste in the phosphoric acid solution, heat it to 550°C at a temperature of 10°C / min (the mass ratio of the garden waste to the phosphoric acid solution is 1:1, the mass of the phosphoric acid solution The percentage concentration is 30%), the...

Embodiment 2

[0025] Embodiment 2: A method for preparing garden waste biomass charcoal includes the following steps:

[0026] S1. Screening garden wastes, screening out herb garden wastes and woody garden wastes, and reserve herb garden wastes and woody garden wastes;

[0027] S2. After drying the herbaceous garden waste at 90°C for 14h (the moisture content of the herbaceous garden waste after drying is less than 5%), use a crusher to crush the dried herbaceous garden waste into powder, and Filter the powder through an 80-mesh sieve to obtain a sieved product, and then send the unsieved powder to the crusher for pulverization until all the powder passes through the sieve, and the powder is ready for use;

[0028] S3. Soak the powder and woody garden waste in the phosphoric acid solution, then dry, and heat it to 600°C at a temperature of 15°C / min (the mass ratio of the garden waste to the phosphoric acid solution is 1:2, the mass of the phosphoric acid solution The percentage concentration is 3...

Embodiment 3

[0029] Embodiment 3: A preparation method of garden waste biomass charcoal includes the following steps:

[0030] S1. Screening garden wastes to screen out herb garden wastes and woody garden wastes, and reserve herb garden wastes and woody garden wastes;

[0031] S2. After drying the herb garden waste at 90°C for 13 hours (the moisture content of the herb garden waste after drying is less than 5%), use a crusher to crush the dried herb garden waste into powder, and Filter the powder through an 80-mesh sieve to obtain a sieved product, and then send the unsieved powder to the crusher for pulverization until all the powder passes through the sieve, and the powder is ready for use;

[0032] S3. Soak the powder and woody garden waste in a phosphoric acid solution and heat it to 600°C at a temperature of 10°C / min (the mass ratio of garden waste to phosphoric acid solution is 1:2, the mass percentage of phosphoric acid solution) The concentration is 40%), the soaking time is 20h, the bio...

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Abstract

The invention discloses a preparation method and application of garden-waste biomass charcoal. The preparation method comprises the following steps: S1, screening garden waste; S2, drying herbaceous garden waste at 90 DEG C for 10 h to 15 h, and crushing dried herbaceous garden waste into powder; and S3, soaking the obtained powder and woody garden waste in a phosphoric acid solution, carrying outdrying, carrying out heating to 550 DEG C to 650 DEG C, and carrying out heat-preserving so as to obtain biomass charcoal, and subjecting the biomass charcoal to digestion in a ferrous sulfate solution so as to obtain the garden-waste biomass charcoal. According to the invention, the garden-waste biomass charcoal is used for removal of pollutants in a water body; the heavy metal chromium can be immobilized in the garden-waste biomass charcoal; compared with ordinary biomass charcoal, the garden-waste biomass charcoal provided by the invention improves the removal rate of heavy metal by 50% orabove; and the garden-waste biomass charcoal provided by the invention can remove methylene blue in dyeing wastewater and has a methylene blue removal rate of 56% to 61%. The preparation method provided by the invention has the following advantages: the garden-waste biomass charcoal can better form a porous structure; the porosity and specific surface area of the garden-waste biomass charcoal areincreased; and the adsorption performance of the garden-waste biomass charcoal is improved.

Description

Technical field [0001] The invention relates to the technical field of biomass char preparation, in particular to a preparation method and application of garden waste biomass charcoal. Background technique [0002] In recent years, with the continuous development of urban ecological construction, the area of ​​gardens has been significantly increased, which has brought a lot of urban green plant waste. The amount of garden waste in my country is increasing year by year. According to data, the amount of garden waste that can be used is increasing year by year. In 2009, the amount of garden waste in Beijing was about 4 million tons. It is expected that the amount of garden waste in the city will reach 4.84 million tons. Garden waste mainly includes branches, leaves and grass clippings, but its utilization rate is only about 15%. Unused garden waste has become one of the main sources of municipal solid waste. The traditional treatment method is incineration or landfill, which will ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/12C02F101/22C02F101/30
CPCB01J20/20B01J20/28054B01J2220/4825C02F1/281C02F2101/12C02F2101/22C02F2101/308
Inventor 申圆圆林倩洪兰莹于博谢金燕
Owner XIAN UNVERSITY OF ARTS & SCI