Method and apparatus for continuous preparation of carbon nanometer tube material from coal

A technology of carbon nanotubes and explosion-proof devices, which is applied in the intersecting field of plasma science and carbon material science, can solve the problem of difficult control of arc and reaction raw material interaction degree, carbon nanotube material quality and quantity limitation, low catalyst utilization efficiency, etc. problems, to achieve the effect of improving the utilization rate of raw materials, reducing the cost of preparation, and reasonable structure of the device

Inactive Publication Date: 2004-11-03
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the fixed bed technology, due to the limited contact between gas and solid, the utilization efficiency of the catalyst is relatively low; the moving bed is a moving fixed bed, and there are similar problems to a certain extent; in the fluidized bed, the contact between gas and solid is good , the catalyst utilization efficiency is high, and it is the technology most likely to realize the large-scale preparation of carbon nanotube materials, but the process is relatively complicated; for the arc spray technology, it is difficult to control the degree of interaction between the arc and the reaction raw materials, so the obtained carbon nanotubes The quality and quantity of the tube material are very limited

Method used

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  • Method and apparatus for continuous preparation of carbon nanometer tube material from coal
  • Method and apparatus for continuous preparation of carbon nanometer tube material from coal
  • Method and apparatus for continuous preparation of carbon nanometer tube material from coal

Examples

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Effect test

Embodiment 1

[0023] Water vapor generation and supply system 1, pulverized coal conveying system 2, plasma generator 3, product collector 4, gas cooling and purification system 5, explosion-proof device 6, system pressure regulating system 7 and induced draft fan 8 are in accordance with the following The top and left to right are connected sequentially; the pulverized coal delivery system is connected to the plasma generator through the pulverized coal delivery pipeline, and the steam generation and supply system is connected to the plasma generator through the gas supply pipeline. Taiji coal is used as raw material, and the particle size of coal powder is less than 1 mm. Heat the water in the steam generator, and adjust the pressure of the gas in the steam generator to 1.6 atmospheres; turn on the induced draft fan, adjust the pressure regulation system, so that the pressure of the entire system is at minus 20 millimeters of water column, and turn on the circulating cooling water; then ,...

Embodiment 2

[0025] The connection of the reaction system is the same as in Example 1. Taiji coal is used as raw material, and the particle size of coal powder is less than 0.50mm. Heat the water in the steam generator, and adjust the pressure of the gas in the steam generator to 1.8 atmospheres; turn on the induced draft fan, adjust the pressure regulation system, so that the pressure of the entire system is at minus 20 millimeters of water column, and turn on the circulating cooling water; then , connect the plasma working gas (high-purity nitrogen), and regulate its flow rate to be 2.6 cubic meters per hour; connect the power supply and initiate the arc of the plasma generator, and the electric current of the electric arc is adjusted to 230 amperes, and the voltage of the electric arc is about 250 volts; high-temperature water vapor is introduced, and the flow rate of water vapor is 2.0 kg / hour; the pulverized coal conveying system is connected, and the pulverized coal transportation volu...

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Abstract

The present invention belongs to the field of coal chemical technology, plasma material science and carbon material technology. The present invention features that powdered coal and high temperature water vapor are sprayed directly into arc plasma to prepare carbon nanotube material continuously. That is, carbon nanotube material is prepared continuously by means of high temperature and arc plasma with high activity particle as medium. The arc plasma has work gas nitrogen and is rotated by means of outer magnetic field. The preparation apparatus consists of water vapor generating and supplying system, coal powder conveying system, plasma generator, product collector, gas cooling and purifying system, explosion-proof unit and pressure regulating system.

Description

technical field [0001] The invention belongs to the intersecting technical field of coal chemical industry, chemical reaction engineering, plasma science and carbon material science. The invention relates to a method and device for continuously and directly preparing carbon nanotube materials with arc plasma technology as the core and coal as raw material. Background technique [0002] Because of its special structure, carbon nanotube materials have unique properties in electricity and mechanics, and have extremely broad application prospects. However, only by realizing the continuous preparation of carbon nanotube materials, can it be applied in many high-tech fields on a large scale. The continuous preparation methods of carbon nanotube materials mainly include fixed bed technology, moving bed technology (CN01111561), fluidized bed technology (CN01118349), and arc spray technology (CN02135447). In the fixed bed technology, due to the limited contact between gas and solid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/08C01B31/02
Inventor 邱介山何孝军赵宗彬孙天军周颖马腾才
Owner DALIAN UNIV OF TECH
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