Patent ID: 6132493
Filing Date: 2000-10-17
Classification: B01D

Abstract:
An air washer comprising:an upwardly-open vessel for holding an air washing liquid so that the air washing liquid has an upper level;an air inlet opening into said upwardly open vessel for introducing air to be washed below the upper level of the air washing liquid;a chamber above the upper level of air washing liquid;a fan spaced from the upper level of air washing liquid and positioned to pull an air flow through an air flow path through said chamber when said fan operates;an exhaust path downstream of said fan for exhaust air driven by said fan; anda liquid return path;whereby operation of said fan induces air to pass through said inlet and to be washed by said air washing liquid and to pass through said chamber to said fan and then to be exhausted through said exhaust path and air washing liquid entrained as liquid droplets in the cleaned air is propelled outwardly by said fan for centrifugal removal from the cleaned air so that the cleaned air exhausting through said exhaust path is substantially free of entrained liquid droplets;whereby the entrained liquid droplets that are propelled outwardly by said fan are drained in said liquid return path;whereby said liquid return path is a part of the air flow path and returns the liquid that is propelled outwardly by said fan to the vessel; andwhereby said fan has an inlet cone to direct cleaned air to said fan and said liquid return path includes a drain hole in said inlet cone.