Abstract: This disclosure relates to a process for steam plume suppression. The process involves using thermosyphon shell and tube heat exchangers to cool a hot gas stream, using a wet scrubber to clean the cooled hot gas stream and generate a wet gas comprising water vapor, and using thermosyphon shell and tube heat exchangers to heat the wet gas above the dew point. This disclosure also relates to a steam plume suppression system. The system involves thermosyphon shell and tube heat exchangers and a wet scrubber.

Abstract: A gas inlet system for a wet gas scrubber includes a weir configured to deliver liquid to a scrubbing passage to wet the interior surface of the scrubbing vessel during operation of the gas inlet system. The weir include a weir duct and a weir trough extending at least partially around the weir duct to receive and at least partially fill with liquid during operation of the gas inlet system. The weir trough has an upper trough outlet in liquid communication with the upper weir duct inlet to deliver liquid from the weir trough into the upper weir duct inlet during operation of the gas inlet system. The weir trough also has a lower trough outlet below the upper trough outlet. The lower trough outlet is in liquid communication with the scrubbing passage to deliver liquid from the weir trough toward the scrubbing passage during operation of the gas inlet system.

Abstract: A gas inlet system for a wet gas scrubber includes a weir configured to deliver liquid to a scrubbing passage to wet the interior surface of the scrubbing vessel during operation of the gas inlet system. The weir include a weir duct and a weir trough extending at least partially around the weir duct to receive and at least partially fill with liquid during operation of the gas inlet system. The weir trough has an upper trough outlet in liquid communication with the upper weir duct inlet to deliver liquid from the weir trough into the upper weir duct inlet during operation of the gas inlet system. The weir trough also has a lower trough outlet below the upper trough outlet. The lower trough outlet is in liquid communication with the scrubbing passage to deliver liquid from the weir trough toward the scrubbing passage during operation of the gas inlet system.

Abstract: A gas inlet system for a wet gas scrubber includes a weir configured to deliver liquid to a scrubbing passage to wet the interior surface of the scrubbing vessel during operation of the gas inlet system. The weir include a weir duct and a weir trough extending at least partially around the weir duct to receive and at least partially fill with liquid during operation of the gas inlet system. The weir trough has an upper trough outlet in liquid communication with the upper weir duct inlet to deliver liquid from the weir trough into the upper weir duct inlet during operation of the gas inlet system. The weir trough also has a lower trough outlet below the upper trough outlet. The lower trough outlet is in liquid communication with the scrubbing passage to deliver liquid from the weir trough toward the scrubbing passage during operation of the gas inlet system.

Abstract: A gas inlet system for a wet gas scrubber includes a weir configured to deliver liquid to a scrubbing passage to wet the interior surface of the scrubbing vessel during operation of the gas inlet system. The weir include a weir duct and a weir trough extending at least partially around the weir duct to receive and at least partially fill with liquid during operation of the gas inlet system. The weir trough has an upper trough outlet in liquid communication with the upper weir duct inlet to deliver liquid from the weir trough into the upper weir duct inlet during operation of the gas inlet system. The weir trough also has a lower trough outlet below the upper trough outlet. The lower trough outlet is in liquid communication with the scrubbing passage to deliver liquid from the weir trough toward the scrubbing passage during operation of the gas inlet system.

Abstract: A process and apparatus for removal of volatile divalent sulfur compounds from waste gases. Volatile organic compounds are advantageously removed in the same process. The divalent sulfur compounds are oxidized in a combustion zone, then preferably removed from the combustion gas, as by absorption or adsorption. The divalent sulfur compound and any VOCs are oxidized in either a catalytic or thermal combustion zone, after which the combustion gases are cooled by transfer of heat to the contaminated gases entering the combustion zone. A regenerative heat transfer reaction system is preferably used. Catalyst may comprise a noble metal, or oxides of Cr, Cu and/or Mn. A catalyst degraded by deposition of sulfate or sulfite salts on its surface may be reactivated by in situ decomposition of such salts. Reactivation also removes such salts from the heat transfer storage beds of a regenerative heat transfer reaction system.