Method of enhancing the effectiveness of electrostatic precipitators used with gas streams formed from burning fuel
US4238203A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1979 |
| Grant date | Dec 9, 1980 |
| Priority date | — |
| Expiry date | Jun 14, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB03C3/013
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The effectiveness of electrostatic precipitators, and particularly existing electrostatic precipitator installations, is enhanced by introducing into the gas stream in advance of the precipitator a spark-inhibiting additive, and then increasing the voltage applied to the precipitator over that which otherwise could be applied. The spark-inhibiting additive is preferably an ammonium salt introduced into the gas stream at a relatively low temperature and preferably in combination with the introduction into the gas stream at a relatively higher temperature of known conditioning additives from the group consisting of sodium bisulphate, ammonium bisulphate, ammonium sulphate and mixtures thereof. An existing installation in which, typically, a single power source energizes a plurality of precipitator cells because of the limiting nature of the sparking characteristics then operative, through the use of this method can be converted to an installation having a marked increase in precipitator efficiency without any additional capital investment other than providing an increased number of power sources so that all or a substantial number of the precipitator cells are provided with individua…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.