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Self-heating continuous powdery biomass activated carbon preparation method and cyclone furnace thereof

A technology for powdered activated carbon and biomass, applied in chemical instruments and methods, educts, carbon compounds, etc., can solve the problem of low product performance, and achieve the effects of long residence time, convenient operation and sufficient reaction.

Inactive Publication Date: 2010-08-04
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the disadvantages of the prior art that the preparation of powdered activated carbon by physical methods requires additional energy, grinding and other complex processes, and the product performance is not high, the present invention provides a method for self-heating continuous preparation of biomass powdered activated carbon and the cyclone Furnace, which has the advantages of high product adsorption performance and no need for external energy

Method used

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  • Self-heating continuous powdery biomass activated carbon preparation method and cyclone furnace thereof
  • Self-heating continuous powdery biomass activated carbon preparation method and cyclone furnace thereof
  • Self-heating continuous powdery biomass activated carbon preparation method and cyclone furnace thereof

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Embodiment 1

[0027] A self-heating method for continuously preparing biomass powdered activated carbon, wherein the biomass powdered carbonized material (wood chips or bamboo chips) with a moisture content of 8 to 20% wt is passed through a cyclone furnace by a screw feeder 1 The feed inlet 21 at the head is fed into the cyclone furnace 2 with a temperature of 900-1300°C, and the suction force of the induced draft fan 5 along the axial direction from the furnace head to the furnace tail and a row of intake pipes on the wall 22 of the cyclone furnace 23 Under the joint action of the activated mixed gas entering obliquely, the biomass powder carbonized material forms a whirlwind state in the furnace, and moves from the furnace head to the furnace tail in a rotating fluidized state, and activates with the entering activated mixed gas while moving The reaction produces gas gas and powdered activated carbon products mainly composed of carbon monoxide. The activation reaction can form the pore st...

Embodiment 2

[0032] A method for preparing biomass powdered activated carbon in a self-heating cyclone furnace is to form a mixed gas according to the ratio (weight ratio) of water vapor and air of 2:1, enter the cyclone furnace at 1300 ° C, and the mixed gas enters the cyclone The radial angle of the furnace is 30°, the moisture content of raw charcoal powder is 20wt%, the feeding speed is 250 kg per hour, and the induced air volume of the induced draft fan is 500M3 / h (standard state), obtain 40 kilograms of powdered activated carbon products per hour, product 0.15% methylene blue adsorption value is 20 milliliters, and A method caramel decolorization power is 80%.

Embodiment 3

[0034] A method for preparing biomass powdered activated carbon in a self-heating cyclone furnace is to form a mixed gas according to the ratio (weight ratio) of water vapor and air of 3:1, enter the cyclone furnace at 1000 ° C, and the mixed gas enters the cyclone The radial angle of the furnace is 80°, the moisture content of the raw bamboo charcoal powder is 8wt%, the feeding speed is 250 kg per hour, and the induced air volume of the induced draft fan is 500M 3 / h (standard state), obtain 45 kilograms of powdered activated carbon products per hour, product 0.15% methylene blue adsorption value is 18 milliliters, and A method caramel decolorization power is 75%.

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Abstract

The invention discloses a self-heating continuous powdery biomass activated carbon preparation method and a cyclone furnace thereof. The method is as follows: a screw feeder feeds powdery biomass carbonized material into the cyclone furnace with the temperature of 90 DEG C to 1300 DEG C via a feed inlet on the furnace head of the cyclone furnace; under the joint action of the axial draft of a draught fan from the furnace head to the furnace tail and the activating mixed gas obliquely entering via a row of inlet tubes on the furnace wall of the cyclone furnace, the powdery biomass carbonized material is formed into a cyclone in the cyclone furnace, rotationally flows from the furnace head to the furnace tail and carries out activating reaction with the entered activating mixed gas in the process of motion to generate gas, the generated gas continues to burn with oxygen, and the produced heat is used for keeping the internal temperature of the cyclone furnace at 900 DEG C to 1300 DEG C; powdery biomass activated carbon and reaction tail gas coming out of the cyclone furnace enter a waste heat boiler, and the produced steam reenters the cyclone furnace. The 0.15-percent methylene blue absorption of the obtained powdery activated carbon is more than 18ml, and meanwhile, the powdery activated carbon has the A-method caramel decolorization rate of more than 70 percent.

Description

technical field [0001] The invention relates to a method and equipment for preparing biomass powdered activated carbon, in particular to a process and equipment for preparing biomass powdered activated carbon by using a self-heating cyclone furnace. Background technique [0002] Activated carbon is an excellent adsorbent with developed pores and specific surface area, which is widely used in the purification and refining of food, chemical industry, light industry, pharmaceutical, military industry, electronics, environmental protection and other industries. With the continuous development of science and technology and the improvement of people's living standards, its application fields have been continuously expanded, and it has played a very important role in industrial production and people's lives. [0003] Activated carbon can be divided into physical activated carbon and chemical activated carbon according to the preparation method. Activated carbon that does not use c...

Claims

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Application Information

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IPC IPC(8): C01B31/10C01B32/336
CPCY02P20/129Y02P20/145
Inventor 刘石彩邓先伦蒋剑春应浩戴伟娣
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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