Patent ID: 6579506
Filing Date: 2003-06-17
Classification: B01D,Y10S

Abstract:
A method of removing oxidizable non-condensible gases (NCG's) comprising hydrogen sulfide, methyl mercaptan, dimethyl sulfide and dimethyl disulfide, from a gas stream containing the same, which comprises:contacting the gas stream with atomized water droplets having a droplet size distribution of about 5 to about 250 microns Sauter Mean Diameter (SMD) in one or more prescrubbing stages to cool the gas stream to its adiabatic temperature and to remove particulate matter out of the gas stream; contacting the gas stream with an oxidizing liquid which is an aqueous solution of chlorine dioxide by intimate gas-liquid and gas-gas contact in one or more contact stages to oxidize reduced sulfur compounds and any other oxidizable compounds present in the gas stream, such contacting being effected by finely atomizing said aqueous solution of chlorine dioxide into the gas stream in each of said contact stages to form a spray of droplet size distribution of about 5 to about 250 microns Sauter Mean Diameter (SMD), and passing the treated gases through an entrainment separator to remove entrained liquid droplets from the gas stream.