Modification of magnesium-enhanced lime flue gas desulfurization process to improve solids dewatering
US5260045A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 22, 1991 |
| Grant date | Nov 9, 1993 |
| Priority date | — |
| Expiry date | Nov 22, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/504
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An improved wet magnesium-enhanced lime flue gas desulfurization system and process are provided. The magnesium-enhanced lime slurry process for removing sulfur dioxide from flue gas to produce gas that is substantially free from sulfur dioxide and calcium and sulfite-containing waste solids is modified to include the addition of process reagents to a separate premix slurry tank which has a controlled, high pH. The addition of slurry formed from the scrubber effluent to the premix slurry tank is controlled to maintain the pH above 10. The premix slurry tank mixture is circulated to a reaction tank for reaction with the scrubber effluent to produce large crystal, easily dewatered waste solids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.