Flue gas conditioning system
US5032154A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 15, 1990 |
| Grant date | Jul 16, 1991 |
| Priority date | — |
| Expiry date | Mar 15, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB03C3/013
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
SO.sub.3 flue gas-condition systems provide a controlled flow of flue gas-conditioning agent such as SO.sub.3 into a boiler flue gas and its entrained particulate material ahead of an electrostatic precipitator. The systems monitor the opacity of the stack effluent and operate to maintain a flow of SO.sub.3 -conditioning agent into the boiler flue gas to provide minimal opacity of the stack effluent. The systems operate to hunt and operate at SO.sub.3 -conditioning agent flow rate corresponding to minimal opacity of the stack effluent and to eliminate corrections that may be due to transient operating conditions such as boiler upsets, precipitator rapping and the like. The systems include features providing improved conversion of SO.sub.2 l into SO.sub.3, integrated assemblies to provide SO.sub.2 from sulfur and sulfur dioxide conversion units adapted to convert SO.sub.2 into SO.sub.3 at a plurality of remote SO.sub.3 injection sites.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.