Patent ID: 7208127

Claim:
A method for processing residual gas, comprising: providing a system including a chamber; introducing residual gas into the chamber, the residual gas having a first toxic level; introducing an inert gas; diluting the residual gas; introducing a reactive gas into the chamber to cause a reaction between the diluted residual gas and the reactive gas to produce a mixed gas; outputting the mixed gas from the chamber, the mixed gas having a toxic level lower than the first toxic level; providing a powder-collection apparatus, coupled to a bottom of the chamber via a first gate and a second gate, to allow continuous removal from the chamber and the powder-collection apparatus of powder produced by the reaction of the residual gas, the inert gas, and the reactive gas in the chamber, without shutting down the system; opening the first gate of the powder-collection apparatus to collect the powder falling into the powder-collection apparatus due to its weight; and closing the first gate and opening the second gate to remove the powder when an amount of the powder collected reaches a predetermined level.