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A kind of production method of bamboo charcoal and carbonization device used in the method

A production method and carbonization technology, applied in the field of materials, can solve the problems of serious pollution, small specific surface area of ​​bamboo charcoal, and low labor productivity, and achieve the effects of high thermal efficiency, light specific gravity, and improved labor productivity.

Active Publication Date: 2021-07-16
四川新磷环保技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The carbonization temperature used in this method generally does not exceed 900 ° C, resulting in a small specific surface area of ​​the produced bamboo charcoal
And, above-mentioned method pollutes serious, labor productivity is low

Method used

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  • A kind of production method of bamboo charcoal and carbonization device used in the method
  • A kind of production method of bamboo charcoal and carbonization device used in the method

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Experimental program
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Effect test

preparation example Construction

[0065] It should be added that bamboo charcoal is prepared by the traditional carbonization pyrolysis method. The preparation method includes the following steps: cut off the bamboo, put it into a vertical carbonization kettle and burn it at a temperature of 800 ° C, and the carbonization time is 72 hours. After cooling, it is obtained Bamboo charcoal products. During the carbonization process, the overflow gas is collected, and the syngas, bamboo tar and bamboo acetic acid are recovered after cooling.

[0066] The bulk weight of bamboo charcoal powder obtained by this method is less than 400g / L, and the BET specific surface area is also less than 600m 2 / g, and can only be intermittently produced one can by one can, and cannot be operated in a continuous assembly line, with low efficiency and prominent environmental protection problems.

[0067] The method of the present invention is also widely applicable to the preparation of ultra-high specific surface area, high iodine ads...

Embodiment 1

[0071] Such as figure 1 As shown, a new biomass material technology enterprise processes 40,000 tons of moso bamboo over 5 years old (the average moisture content at the factory is 15%). The shape raw material size is 3mm~50mm×3mm~50mm, and the thickness is 1mm~10mm. After arriving at the factory, soak in 15% sodium hydroxide aqueous solution for 24 hours, then bake with recovered hot air at 150°C for 45 minutes, and dry until the moisture content is lower than 0.6%, and the particle size of 100 mesh after crushing is greater than or equal to 85%. . Then flash low-oxygen carbonization at 1000°C for 3 seconds and anaerobic carbonization at 950°C for 60 minutes, and then use cold air as the medium to cool to 55°C by pipeline heat exchange to obtain high The specific surface area of ​​bamboo charcoal powder is 10,000 tons, and the gas overflowed by flash low-oxygen carbonization and anaerobic carbonization is separated by a condenser to recover syngas of 11.9 million Nm 3 , 2,...

Embodiment 2

[0078] A bamboo industry cooperative runs its own bamboo charcoal enterprise, processing 12,500 tons of Cizhu over 3 years old each year (the average moisture content at the factory is 20%). . After arriving at the factory, soak in 20% sodium hydroxide aqueous solution for 24 hours, then bake with recovered hot air at 180°C for 30 minutes until the moisture content is lower than 2%, and the particle size after crushing is less than 1mm. Then flash low-oxygen carbonization at 950°C for 7 seconds and anaerobic carbonization at 900°C for 50 minutes, and then use cold air as the medium to cool to 60°C by pipeline heat exchange to obtain a particle size of 50 mesh greater than or equal to 65% high ratio The surface area of ​​bamboo charcoal powder is 3,000 tons, and the gas overflowed by flash low-oxygen carbonization and anaerobic carbonization is separated by a condenser to recover synthesis gas of 3.4 million Nm 3 , 550 tons of bamboo tar and 3,500 tons of bamboo acetic acid. ...

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Abstract

The invention relates to a production method of bamboo charcoal and a carbonization device used in the production method. The production method includes: raw material processing: chopping bamboo, soaking in caustic soda, drying and crushing to obtain bamboo powder; carbonization: first performing flash low-oxygen carbonization on the bamboo powder, and then performing anaerobic carbonization; heat exchange cooling : the product after carbonization is carried out heat exchange and cooling under anaerobic environment, and the product after cooling is the first bamboo charcoal powder; Conversion: the first bamboo charcoal powder is converted in a graphitization furnace to obtain the second bamboo charcoal powder; molding : mixing the second bamboo charcoal powder and a binder to make a molding material; electrothermal carbonization: electrothermally carbonizing the molding material; steam activation: steam activating the product after electrothermal carbonization to obtain bamboo charcoal. The method can be used to prepare bamboo charcoal with ultra-high specific surface area, high iodine adsorption value and high strength, and the by-products of synthesis gas, bamboo tar and bamboo acetic acid can also be recovered. The carbonization device can be widely used in other biomass carbonization.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to a production method of bamboo charcoal and a carbonization device used in the method. Background technique [0002] Bamboo charcoal is a kind of biochar made from bamboo as raw material through high-temperature carbonization. Bamboo charcoal has a loose and porous structure, its molecules are fine and porous, and its texture is hard. Bamboo charcoal has a strong adsorption capacity, which can purify the air, eliminate odors, absorb moisture, prevent mildew, inhibit bacteria and repel insects; when in contact with the human body, it can dehumidify and absorb sweat, promote human blood circulation and metabolism, and relieve fatigue. In addition, bamboo charcoal has a high porosity, which is very suitable as a carrier of soil microorganisms and organic nutrients to enhance soil vitality, and is a good soil improvement material. Bamboo charcoal also has weak conductivity, which ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/336C01B32/318C01B32/39C10B53/02C10J3/00
CPCC10B53/02C10J3/00C10J2300/0906C10J2300/0909C10J2300/092C10J2300/1215Y02E50/10
Inventor 黄钰雪
Owner 四川新磷环保技术有限公司
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