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Bamboo charcoal production method and carbonization device used thereby

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

Active Publication Date: 2018-05-22
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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  • Bamboo charcoal production method and carbonization device used thereby
  • Bamboo charcoal production method and carbonization device used thereby

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Effect test

preparation example Construction

[0065] It should be added that bamboo charcoal is prepared by the traditional dry distillation pyrolysis method, and the preparation method includes the following steps: cut off the bamboo, put it into a vertical dry distillation 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 synthesis gas, bamboo tar and bamboo acetic acid are recovered after cooling.

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

[0067] The method of the present invention is also widely applicable to the preparation of ultra-high spec...

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 size of the shaped raw material is 3 mm to 50 mm × 3 mm to 50 mm, and the thickness is 1 mm to 10 mm. 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 overflow gas from flash low-oxygen carbonization and anaerobic carbonization is separated by a condenser, and 11.9 million N...

Embodiment 2

[0078] A bamboo industry cooperative runs its own bamboo charcoal enterprise, which processes 12,500 tons of bamboo charcoal over 3 years old each year (the average moisture content at the factory is 20%). 10mm. After arriving at the factory, soak in 20% sodium hydroxide aqueous solution for 24 hours, and then bake with recovered 180°C hot air 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 through 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...

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Abstract

The invention relates to a bamboo charcoal production method and a carbonization device used thereby. The production method comprises following steps: processing raw materials: cutting bamboos, soaking bamboos in caustic soda, and drying and grinding bamboos to obtain bamboo powder; carbonization: subjecting the bamboo powder to flash low-oxygen carbonization and oxygen free carbonization in sequence; heat transfer and cooling: subjecting the carbonization product to heat transfer and cooling in an oxygen free environment, and after cooling, obtaining first bamboo charcoal powder; conversion:converting the first bamboo charcoal powder in a graphitization furnace to obtain second bamboo charcoal powder; moulding: mixing the second bamboo charcoal powder with a binder to prepare a moulded material; electric heating carbonization: subjecting the moulded material to electric heating carbonization; and steam activation: subjecting the product of electric heating carbonization to steam activation to obtain bamboo charcoal. The method can prepare bamboo charcoal with an ultrahigh specific surface area, high iodine absorption value, and high strength, and moreover, byproducts (syngas, bamboo tar, and bamboo vinegar) are recovered. The carbonization device can also be used for the carbonization of other biomasses.

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 peculiar smell, 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 and 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, w...

Claims

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Application Information

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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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