Fiber-rejecting corona discharge electrode and a filtering system employing the discharge electrode
US4266948A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 4, 1980 |
| Grant date | May 12, 1981 |
| Priority date | — |
| Expiry date | Jan 4, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB03C2201/10
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
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 fiber-rejecting 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 so that the corona discharge occurs in a region that is shielded from fibers carried by the gas stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.