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Preparation method of bamboo biochar

A biochar and product technology, applied in the field of biochar preparation, can solve the problems of environmental pollution and inability to be fully utilized, and achieve the effect of increasing economic benefits, improving utilization rate and added value, and having broad application prospects

Inactive Publication Date: 2015-06-24
ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the utilization of bamboo is mainly bamboo fiber, and a large amount of waste and residues are generated during the processing process, which not only cannot be fully utilized, but also directly discarded will cause environmental pollution

Method used

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  • Preparation method of bamboo biochar

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preparation example Construction

[0023] Embodiments of the present invention provide a kind of preparation method of bamboo biochar, comprising the following steps:

[0024] The bamboo raw material is crushed, mixed with water, and then introduced into a hydrothermal reaction kettle for hydrothermal carbonization reaction. The ratio of the mass of the bamboo raw material to the volume of water is 1kg:6L~1kg:22L; the product of the hydrothermal carbonization reaction is cooled , separated by filtration, and dried to obtain bamboo biochar.

[0025] In the above technical solution, the present invention realizes the comprehensive utilization of bamboo materials, increases the added value, and can fix carbon and reduce emissions, and obtains products that can be used for environmental pollution restoration, and has good economic and social benefits.

[0026] As a preferred solution, the present invention also includes a pretreatment step of bamboo raw materials: reclaiming waste bamboo leaves, bamboo powder, bamb...

Embodiment 1

[0036] Such as figure 1 Shown, bamboo biochar is prepared according to the following steps:

[0037] Step 1. Recycling and pretreatment of bamboo raw materials: Recycling waste bamboo leaves, bamboo powder, bamboo stalk residues or other bamboo processing wastes generated during bamboo processing, and removing soil and debris on the surface of raw materials;

[0038] Step 2, crushing of bamboo raw materials: crushing bamboo raw materials to obtain small particles, storing them for subsequent use;

[0039] Step 3. Hydrothermal carbonization of bamboo raw materials: Mix bamboo particles with water, import them into a hydrothermal kettle, ensure that the hydrothermal kettle is airtight, and heat for hydrothermal carbonization reaction. The hydrothermal reaction temperature is 160 o C, reaction time 15 h, bamboo raw material and water-solid-liquid ratio 1kg:6L;

[0040] Step 4. Filtration and separation of solid and liquid phase products: After the hydrothermal carbonization pro...

Embodiment 2

[0043] Step 1. Recycling and pretreatment of bamboo raw materials: Recycling waste bamboo leaves, bamboo powder, bamboo stalk residues or other bamboo processing wastes generated during bamboo processing, and removing soil and debris on the surface of raw materials;

[0044] Step 2, crushing of bamboo raw materials: crushing bamboo raw materials to obtain small particles, storing them for subsequent use;

[0045] Step 3. Hydrothermal carbonization of bamboo raw materials: mix bamboo particles with water, introduce them into a hydrothermal kettle, ensure that the hydrothermal kettle is airtight, and heat for hydrothermal carbonization reaction. The hydrothermal reaction temperature is 200 o C, reaction time 3 h, bamboo raw material and water-solid-liquid ratio 1kg:6L;

[0046] Step 4. Filtration and separation of solid and liquid phase products: After the hydrothermal carbonization process, take out the hydrothermal reaction kettle and place it in cooling water, and cool it to ...

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Abstract

The invention discloses a preparation method of bamboo biochar. The preparation method has the beneficial effects that bamboo wastes serve as raw materials for preparation of biochar and the bamboo materials are transformed into biochar through hydrothermal reaction, thus providing a new bamboo material utilizing mode, increasing the comprehensive utilization rates of the bamboo materials and the economic benefits and increasing the additional value; the preparation method is clean and green in processes, is simple to operate, conduces to achieving cyclic utilization of resources, is beneficial to carbon fixation and reduction of emission of carbon dioxide and has good ecological benefits; besides, the method is low in energy consumption and cost, has good industrial application prospects and can achieve sink increase and emission reduction; the prepared product can be also applied to improving soil and restoring the water environment and has extensive application prospects.

Description

technical field [0001] The invention relates to the technical field of biochar preparation, in particular to a preparation method of bamboo biochar. Background technique [0002] Biochar is a stable carbon-rich solid formed from biomass under anoxic or anaerobic conditions. Studies have shown that adding biochar to soil can improve soil fertility and promote crop growth. At the same time, the application of biochar to soil can inhibit the release of greenhouse gases, reduce the diffusion of pesticides in the soil and the accumulation in animals and plants. . In addition, biochar can adsorb pollutants, adding biochar to polluted water can improve water quality and repair water pollution. Therefore, carbonizing waste biomass into biochar is considered to be an effective method for carbon sequestration and biomass resource utilization. [0003] Biomass carbonization technology can be divided into pyrolytic carbonization and hydrothermal carbonization. Among them, pyrolytic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02
Inventor 李音盖希坤刘宝鉴杨瑞芹毛建卫
Owner ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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