Method and apparatus for continuously preparing foam carbon material from coal

Abstract

The invention belongs to a cross technology field of coal chemistry, chemical reaction project, plasma science and charcoal material science. It refers to a method and device for using coal and water steam as materials to produce foam charcoal material continuously. The method sprays powder coal and high temperature steam into direct current arc plasma and produce foam charcoal material continuously, the mixing, foaming, synthesizing charring and graphitizing are all completed in one step. The device is made up of steam generating and supplying system, coal powder transmitting system, plasma generator, solid collector, gas cooling and purifying system, explosion protection device, system pressure adjusting system and draught fan. The invention can be operated conveniently; it can be controlled, and can be operated continuously with low cost.

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 preparing foamed carbon materials from coal and steam as raw materials, with DC arc plasma technology as the core. Background technique [0002] Foam carbon material has the characteristics of low density, high specific strength, good high temperature resistance, excellent acid and alkali corrosion resistance and no oxide impurities on the surface. It is a light porous material. It is worth noting that the thermal conductivity of foamed carbon is widely distributed; ordinary foamed carbon, like other foam materials, has low thermal conductivity and can be used as thermal insulation material; and foamed carbon with a high degree of graphitization has higher thermal conductivity than metal copper. 4 to 6 times the thermal conductivity,...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the shortcomings of expensive raw materials and complicated process in the prior art, and propose a method of directly using pulverized coal and high-temperature water vapor as raw materials, and using DC arc plasma technology to realize one-step continuous preparation of foamed carbon materials The method and device can reduce the production cost, and, through the rotating high-temperature arc plasma, the reaction between the active particles produced by the coal powder and the water vapor can be made sufficient and fast, and the carbonization and carbonization of foamed carbon can be completed in one step The preparation process including graphitization and other processes is simple; in addition, by applying an electromagnetic field, it can not only confine the arc plasma, improve the life of electrodes and active particles, but also adjust the reactants such as coal and excite them by changing the current in the coil. The action time of the highly active arc plasma improves the utilization rate of raw materials and makes the whole process controllable

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