A combustion device of coal powder using arc plasma is designed and studied

which has simple structure and can keep steady combustion. It takes full advantage of the characteristics of arc plasma

such as high temperature

high thermal power density of unit volume of fuel

high chemical reactivity and so on. Coal powder injected into the device can drastically bum with a great deal of air after the coal powder is gasified and activated by the arc plasma with fixed rate of thermal power input. The elementary experiment results show that the device can keep steady combustion and the temperature of the flame center is about 1150-1260℃ at the outlet of the main combustion chamber

and that the ratio of the input power of arc plasma to the thermal power of coal powder is about 1 : 25.