Hot-side, single-stage electrostatic precipitator having reduced back corona discharge
US5282891A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 1, 1992 |
| Grant date | Feb 1, 1994 |
| Priority date | — |
| Expiry date | May 1, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB03C3/455
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An improved hot-side electrostatic precipitator is provided which more efficiently removes particulates such as fly ash from gases by substantially decreasing the occurrence of back corona discharge. The improved hot-side electrostatic precipitator is based upon the discovery that back corona discharge occurs primarily, if not entirely, in the accumulated particle layer in those sections of the collection plates having a temperature low enough to initiate back corona discharge. Based on this recognition, the corona electrodes and collection plates of the present invention define an upper laterally extending primary operating region having a temperature substantially throughout that is greater than a first value and having at least a portion with a localized electric field strength in the primary operating region greater than a second value, and a lower laterally extending secondary operating region having a temperature substantially throughout that is less than the first value and a localized electric field strength substantially throughout that is less than the second value. The first and second values are selected so that the likelihood of back corona discharge is reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.