FIBER-REJECTING CORONA DISCHARGE ELECTRODE

摘要

FIBER-REJECTING CORONA DISCHARGE ELECTRODE In a system for filtering fibers and particulates from a gas stream, a fiber separator (10) is disposed to remove fibers in gross quantity from the gas stream. A corona charging apparatus (20) is disposed downstream of the fiber separator (10) to impart electric charge to particulates and to fibers that escape removal from the gas stream by the fiber separator (10). An electrostatic filter medium (30), which may advantageously be mounted on the cylindrical wall of a drum filter, is disposed downstream of the corona charging apparatus (20) to remove electrically charged particulates and fibers from the gas stream. The corona charging apparatus (20) comprises at least one fiber-rejecting corona discharge electrode (21 or 25). The fiberrejecting electrode (21) comprises a shielding portion (22) facing upstream and a corona discharge portion (23) facing downstream in the gas stream The radius of curvature of the shielding portion (22) is greater than the radius of curvature of the corona discharge portion (23) in a plane parallel to the gas stream 80 that the corona discharge occurs in a region that is shielded from fibers carried by the gas stream.