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Method and apparatus for continuously preparing foam carbon material from coal

A technology of foamed carbon and pulverized coal, which is applied in the petroleum industry, coking ovens, indirect heating and dry distillation, etc., can solve the problems of expensive raw materials, process and complexity, and achieve the effects of reducing production costs, responding fully and quickly, and improving utilization

Inactive Publication Date: 2004-09-15
DALIAN UNIV OF TECH
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  • Description
  • Claims
  • Application Information

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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

Method used

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  • Method and apparatus for continuously preparing foam carbon material from coal
  • Method and apparatus for continuously preparing foam carbon material from coal
  • Method and apparatus for continuously preparing foam carbon material from coal

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Experimental program
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Embodiment approach 1

[0030] Taiji coal is used as raw material, and the pulverized coal particle size is less than 2 mm. Set the pressure of the gas in the steam generator to 1.4 to 1.8 atmospheres, heat the water in the steam generator, and when the set pressure is reached, turn on the induced draft fan and adjust the pressure regulating system to make the system pressure negative 20 mm Water column, connected to circulating cooling water.

[0031] Connect the plasma working gas (compressed air), the flow rate of the compressed air is 1.2 cubic meters per hour; connect the electric current of the electromagnetic coil, the current is 245 amperes; connect the power supply and cause the electric arc of the plasma generator, the electric current of the electric arc is 260 amperes, the voltage of the arc at this time is 270 volts; the high-temperature water vapor in the steam delivery system is passed, and the flow rate of the water vapor is 2.4 kg / hour; 3.0 kg / h; in this way, the compressed air dire...

Embodiment approach 2

[0033] Others are the same as Embodiment 1, when the electric current of the electric arc is 290 amperes, the voltage of the electric arc is about 250 volts, and the delivery rate of pulverized coal is 2.1 kg / hour, the photo of the typical electron scanning electron microscope of the obtained foamed carbon material is shown in Figure 5 .

Embodiment approach 3

[0035] Others are the same as embodiment 1, when the delivery rate of pulverized coal is 1.6 kg / hour, the photo of the typical scanning electron microscope of the obtained foamed carbon material is shown in Figure 6 .

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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,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B47/28
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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