Method for electrostatically charging up solid or liquid particles suspended in a gas stream by means of ions
US4726812A · kind A · utility
47Cited by
3References
5Claims
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Assignee
Inventor
Key dates
| Filing date | Mar 26, 1987 |
| Grant date | Feb 23, 1988 |
| Priority date | — |
| Expiry date | Mar 26, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB03C3/38
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for electrostatically charging up particles suspended in a gas stream by means of ions originating from a separate unipolar ion source, wherein the ions are injected into the gas/particle stream by means of an alternating field and are deposited on the particles. The frequency of the alternating field is chosen so high at the specified maximum field strength that the drive velocity of the ions during a half-cycle is insufficient to carry the ions to the counter-electrode. As a result, undesirable wall recombination of the ions is avoided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.