Exhaust gas liquid contactor

Claim 1

Apparatus for cleaning exhaust gas containing pollutants in the form of suspended particulate solid particles comprising in combination: 1. A tank having an inlet and an outlet, said tank comprising a substantially circular outer casing, said gas inlet pipe being tangentially connected to the lower portion of said tank; an inner cylinder erected in the center of said outer casing, said inner cylinder being slightly lower in height than said casing, and an arc-shaped air guide plate extending from an inside end of said gas inlet pipe in the outer casing to the outer peripheral face of said inner cylinder, and the bottom end of said inner cylinder being connected to the cooling means; 2. A gas inlet pipe connected to said tank and adapted to be connected to a source of heated gas containing pollutants; 3. A body of liquid within said tank, said gas inlet pipe being arranged relative to said body of liquid to insure gas-liquid contact to cause vaporization of said liquid and to form an intimate mixture of hot gas and liquid vapor; 4. An elongate gas outlet pipe, connected at one end thereof to said tank outlet, said outlet pipe having a length selected to make the said suitable to cool said mixture below the dew point of the liquid vapor so as to form droplets of liquid in the gas, the solid particulate material suspended in the gas serving as nuclei for the formation of such droplets; and 5. A filter connected to the other end of said elongate gas outlet pipe remote from said tank, said filter being adapted for separating the liquid droplets from the gas, whereby the solid particles, which would otherwise be too fine to be removed directly from the gas, are retained by the filter as the nuclei of the relatively larger liquid droplets, so that undesirable particulate material can be readily removed from an exhaust gas prior to discharge to the atmosphere.