Patent ID: 6497757
Filing Date: 2002-12-24
Classification: B01D

Abstract:
An apparatus for removing impurity substances in the air, comprising:a housing defining a flow passage guiding the air to be treated; a first filter, located in said flow passage, for removing solid particles contained in the air; a first cooler, located downstream from said first filter in said flow passage, for cooling said air to be treated below a dew-point temperature; a first atomizer for atomizing a capturing liquid for capturing gaseous substances in the air cooled below a dew-point temperature, said first atomizer having a first plurality and a second plurality of atomizing nozzle ports mutually spaced apart and facing each other in the direction of the flow passage; first and second condensing and capturing assemblies for capturing an atomized liquid containing said gaseous substances, said first and second condensing and capturing assemblies being located across said first atomizer and spaced apart from each other, said first one upstream from and said second one downstream from said first atomizer; a second atomizer, located downstream from said first and second condensing and capturing assemblies, for atomizing a capturing liquid toward the upstream side of said flow passage to capture remaining gaseous substances in the air; a third condensing and capturing assembly located downstream from said second atomizer; a second cooler, located downstream from said third condensing and capturing assembly in said flow passage, for cooling the air to not higher than a dew-point temperature thereof to condense said atomized liquid containing said gaseous substances remaining in the air; and a second filter located downstream from said second cooler in said flow passage and using a material denser than that of said first filter.