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Method for preparing bamboo-based activated carbon and production device thereof

A production device and activated carbon technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of poor quality stability of bamboo-based activated carbon, uneven heating of materials, and many human-influenced factors, etc., to achieve uniform reaction fully, reduce the exhaust of flue gas, and improve the effect of comprehensive utilization

Inactive Publication Date: 2014-04-02
HUNAN HUAYIN ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The inventors have found that the existing bamboo-based activated carbon preparation process has the following problems: many human factors, uneven heating of materials, low carbonization temperature, poor quality stability of the prepared bamboo-based activated carbon and oxidation problems

Method used

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  • Method for preparing bamboo-based activated carbon and production device thereof

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preparation example Construction

[0039] The preparation method of bamboo-based activated carbon of the present invention and an embodiment of production system are divided into four sections and are specifically as follows:

[0040] 1. Drying section

[0041] After the bamboo is crushed, it first enters the drying equipment (drying room) 1, and the drying room 1 uses a drying gas of 250°C-350°C to dry the broken bamboo, and the drying time is 0.5-2h. The gas mixer 4 is piped to the drying chamber 1, and the drying gas is delivered to the drying chamber 1 by the gas mixer 4 to dry the bamboo.

[0042] Preferably, the drying gas is a mixture of various gas components, mainly including the 900°C-1000°C high-temperature flue gas generated by the combustion of the heat source heating furnace 3 in the carbonization process, the 90°C-180°C drying tail gas and the gas generated by the bamboo during the drying process. The present invention preferably burns low-temperature pyrolysis gas and external fuel in the heati...

Embodiment 1

[0072] The same bamboo will be crushed into 11mm×11mm×5mm, sent to the drying room, and the bamboo will be dried and dehydrated with 300°C dry gas for 0.5h under normal pressure, and the dry tail gas will be recycled. The drying gas is composed of a mixture of high-temperature flue gas at 1000°C generated by the heating furnace and dry tail gas at 150°C.

[0073] Then the dried bamboo is sent to the integrated carbonization and activation furnace, and the pyrolysis gas at 600°C is used as the heat carrier to carbonize the dried bamboo under the condition of anoxic. The carbonization time is 1.5h, and the volatile content of bamboo charcoal reaches below 5%, and the carbonization is completed.

[0074] Spray high-temperature water vapor at the bottom of the carbonization and activation integrated furnace to activate the bamboo charcoal. The activation temperature is 900°C, the weight ratio of water vapor to carbon is 1:6, and the activation time is 2 hours. After cooling by the...

Embodiment 2

[0079] The Taojiang moso bamboo is crushed into 11mm×11mm×5mm, sent into the drying chamber 1, and dried and dehydrated for 0.5h with dry gas at 300°C under normal pressure, and the dried tail gas is recycled. The drying gas is composed of a mixture of high-temperature flue gas at 1000°C generated by the heating furnace and dry tail gas at 150°C.

[0080] Then the dried bamboo is sent to the carbonization and activation unit, and the pyrolysis gas at 600°C is used as the heat carrier to carbonize the dried bamboo under the condition of anoxic. The carbonization time is 1.5h, and the volatile content of bamboo charcoal reaches below 5%, and the carbonization is completed.

[0081] Spray high-temperature water vapor at the bottom of the carbonization and activation integrated furnace to activate the bamboo charcoal. The activation temperature is 900°C, the weight ratio of water vapor to carbon is 1:6, and the activation time is 1.8h. After cooling by the cooling device, the bamb...

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Abstract

The invention provides a method for preparing a bamboo-based activated carbon and a preparation device thereof. The method comprises the following steps: A, drying, namely crushing bamboo materials at 250-350 DEG G and drying the crushed bamboo materials by drying air; B charring, namely charring the dry bamboo materials under the oxygen deficit condition by using 550-700 DEG C pyrolysis gas as thermal supports; C activating, namely spraying water steam to the charred bamboo materials, activating the bamboo carbon under the oxygen deficit condition at the activating temperature of 900-1000 DEG C, and cooling the activated bamboo carbon to obtain the bamboo-based activated carbon. The reaction is uniform and complete, the water steam in the activating process is completely contacted with the charred material, the generated activated carbon does not easily head and scale in the furnace, and the stability of product quality and the rate of carbon are improved. Moreover, the charring dry-distillation residual heat is completely utilized, the energy consumption is reduced, the charring dry-distillation by-products are recovered, the fume emission is reduced, the pollution to environment is reduced, and the comprehensive utilization rate of the bamboo materials is improved.

Description

technical field [0001] The invention relates to a preparation method and production device of bamboo-based activated carbon. Background technique [0002] Activated carbon is an excellent adsorbent with developed pore structure, large specific surface area and adsorption capacity. It is stable in nature, insoluble in water and organic solvents, resistant to acid and alkali, and easy to regenerate after use. There are many types of activated carbon, but the history of activated carbon manufacturing and application proves that compared with activated carbon produced from other raw materials, activated carbon produced from bamboo and wood materials has the advantages of large total pore volume, large specific surface area, large reactivity and less impurities. However, with the improvement of the environmental awareness of the whole society, in order to protect forest resources, the state expressly prohibits deforestation, so the raw materials of wood activated carbon are incre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/10C01B32/336
Inventor 魏远宾文锦何曙光张卫东
Owner HUNAN HUAYIN ENERGY TECH
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