Method and apparatus for removing sulfur dioxide from gas streams
US5433925A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 15, 1994 |
| Grant date | Jul 18, 1995 |
| Priority date | — |
| Expiry date | Aug 15, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/504
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process and apparatus for removing SO.sub.2 from low-volume gas streams containing high concentrations of SO.sub.2 includes a tank scrubber containing an aqueous SO.sub.2 absorbent and an impeller. The tank scrubber has an unpartitioned vessel. The impeller includes a vertical rotating shaft having an upper and lower impeller. The lower impeller serves to agitate the SO.sub.2 absorbent. The upper impeller includes a shroud thereby directing the absorbent and gas outwardly toward the wall of the scrubber. The gas is injected into the absorbent at a point below the shrouded impeller. The shroud prevents gas bypass and thereby promotes gas-liquid mixing and, consequently, markedly improves SO.sub.2 removal efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.