Patent ID: 6423278
Filing Date: 2002-07-23
Classification: B01D,H01J,H05H,Y02C

Abstract:
A plasma dry scrubber in which introduced gas is decomposed in a plasma state so that the gas is scrubbed, said scrubber comprising:a plasma generator for generating the plasma; a radio frequency (RF) generator for generating a high frequency power supply signal; and an impedance matching unit disposed between the plasma generator and the RF generator for receiving and impedance matching the high frequency power supply signal from the RF generator, and for feeding the impedance-matched high frequency power supply signal as an output; wherein said plasma generator comprises: first and second antennas for receiving the impedance-matched high frequency power supply signal from the impedance matching unit, and for generating a plasma; a housing having a gas inlet port through which gas to be scrubbed is introduced, a gas outlet port through which the scrubbed gas is discharged, a plasma generating chamber formed between the gas inlet port and the gas outlet port, and first and second receiving units provided at upper and lower parts, respectively, of the housing for receiving the first and second antennas, respectively; and first and second isolating plates mounted in the first and second receiving units, respectively, for isolating the first and second antennas, respectively, from the plasma generating chamber.