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Preparation method of chemical-additive-free formed biomass charcoal

A chemical additive and biomass carbon powder technology, applied in the chemical industry, can solve the problems of affecting the personal safety of users, loss of cohesiveness of biomass, etc., and achieve the effects of solving toxic and harmful by-products, simple production process and significant technological progress.

Inactive Publication Date: 2017-05-10
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the molding process after carbonization also has its disadvantages. After carbonization, the biomass loses its cohesiveness due to the decomposition of natural cohesive substances such as lignin. Therefore, it is necessary to add a binder for remolding. The binder contains a lot of chemicals
During the combustion process, these chemicals will volatilize and react with biomass charcoal powder to produce other toxic and harmful substances that will affect the personal safety of users.

Method used

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  • Preparation method of chemical-additive-free formed biomass charcoal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Sieve the sawdust to 0.3~0.5mm, dry it, and pour it into a rotary kiln for carbonization at 450°C to obtain sawdust charcoal powder. Weigh 10g of sawdust charcoal powder and put it into a container. Weigh 5g of soluble starch, put it into a container and stir to mix the sawdust charcoal powder and soluble starch evenly to obtain a dry material. At this time, the ratio of sawdust charcoal powder to soluble starch is 2:1. Weigh 25ml of boiling water at 100°C according to the ratio of sawdust charcoal powder to water: 1:2.5, pour it into a container and stir evenly. Without heating, it is directly transported to a molding machine with a diameter of 32mm at room temperature, and the molding pressure is set to 100MPa to press the raw meal; after maintaining the pressure for 60s, the pressure is released, and the molded biomass fuel is taken out. Mark it as A1.

Embodiment 2

[0025] Sieve the sawdust to 0.3~0.5mm, dry it, and pour it into a rotary kiln for carbonization at 450°C to obtain sawdust charcoal powder. Weigh 9g of sawdust charcoal powder and put it into a container. Weigh 3g of soluble starch, put it into a container and stir to mix the sawdust charcoal powder and soluble starch evenly to obtain a dry material. At this time, the ratio of sawdust charcoal powder to soluble starch is 3:1. Weigh 24ml of boiling water at 100°C according to the ratio of sawdust charcoal powder to water: 3:8, pour it into a container and stir evenly. Heating temperature to 90°C, conveying to a molding machine with a diameter of 32mm, setting the molding pressure at 100MPa, pressing the raw meal; keeping the pressure for 40s, releasing the pressure, and taking out the shaped biomass fuel. Mark it as A2.

Embodiment 3

[0027] Sieve the sawdust to 0.3~0.5mm, dry it, and pour it into a rotary kiln for carbonization at 450°C to obtain sawdust charcoal powder. Weigh 8g of sawdust charcoal powder and put it into a container. Weigh 2 g of soluble starch, put it into a container and stir to mix the sawdust charcoal powder and soluble starch evenly to obtain a dry material. At this time, the ratio of sawdust charcoal powder to soluble starch is 4:1. Weigh 24ml of boiling water at 100°C according to the ratio of sawdust charcoal powder and water at 1:3, pour it into a container and stir evenly. Heating to 36°C, transporting to a molding machine with a diameter of 32mm, setting the molding pressure to 100MPa, pressing the raw meal; keeping the pressure for 45s, releasing the pressure, and taking out the molded biomass fuel. Marked as A3.

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Abstract

A preparation method of chemical-additive-free formed biomass charcoal comprises steps as follows: a raw material is obtained by crushing and screening a substance; the raw material is conveyed to a rotary kiln to be subjected to carbonization treatment at 300-900 DEG C, and biomass charcoal powder is obtained; the biomass charcoal is placed in a container; soluble starch is weighed and placed in the container, and the biomass charcoal powder and the soluble starch are uniformly mixed through stirring; boiling water is weighed and poured into the container to be uniformly stirred; the material is poured in a heater, and a cooked material is obtained through heating; the material in the heater is poured into a forming machine to be pressed under the pressure of 20-400 MPa; the material is kept for 10-3,600 s; finally, pressure relief is performed and the chemical-additive-free formed biomass charcoal is obtained. The pollution -free soluble starch is adopted, precipitation of other added compounds is avoided during combustion, the production process is simple, and the problems that multiple chemical reagents are added and produce toxic and harmful byproducts during combustion in traditional treatment modes are better solved.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to a method for forming biomass, in particular to a method for preparing biomass-formed charcoal without chemical additives. Background technique [0002] As a renewable energy source, biomass energy is renewable, clean and low-pollution, CO 2 Zero emissions, rich resources and other advantages. my country is a large agricultural country with huge agricultural output and a large amount of agricultural and forestry waste. The traditional treatment method is direct combustion, which causes serious pollution to the environment. [0003] The development of biomass utilization technology can not only alleviate the problem of environmental pollution, but also make full use of waste biomass resources in agriculture and forestry, and improve or improve the living conditions of farmers. It has obvious social and economic significance, and is in line with my country's current national conditio...

Claims

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Application Information

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IPC IPC(8): C10L5/44C10B57/00C10B57/02C10L5/40
CPCY02E50/10Y02E50/30C10L5/447C10B57/00C10B57/005C10B57/02C10L5/40C10L2200/0469C10L2290/24C10L2290/30
Inventor 张守玉江锋浩吴顺延王才威李昊张一帆
Owner UNIV OF SHANGHAI FOR SCI & TECH