Method using lime slurry for regenerating sodium sulfite in double alkali flue gas desulfurization process

Patent · Tue May 12 00:00:00 EDT 1981

OSTI ID:6148069

Dabbs, J C; Dauerman, L; Delaney, B; Rao, K K

In the process of desulfurizing flue gases in which an alkaline solution of sodium, such as sodium sulfite or sodium hydroxide, is contacted with gases in a scrubber to produce a sodium bisulfite solution, an improved method is provided for substantially reducing the time and equipment required to regenerate the sodium solution. In the method, a lime slurry stream and a sodium bisulfite stream are conflowed into a bifurcated mixing nozzle having a pair of converging inlets and a common outlet. The confluence of the streams in the nozzle creates turbulence which causes the lime slurry to react substantially instantaneously with the sodium bisulfite solution to regenerate the sodium solution which is recycled to the scrubber and a calcium sulfite precipitate which is filtered from the sodium solution and discarded.

• Assignee: New Jersey Institute Of Technology, The Foundation
• Patent Number(s): US 4267156
• OSTI ID: 6148069
• Resource Relation: Patent File Date: Filed date 11 Jul 1979
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
42 ENGINEERING
FLUE GAS
DESULFURIZATION
FOSSIL-FUEL POWER PLANTS
SCRUBBERS
OPERATION
SULFUR DIOXIDE
AIR POLLUTION CONTROL
FLOW RATE
PARTICLE SIZE
RECYCLING
REGENERATION
SLURRIES
SODIUM COMPOUNDS
SULFITES
ALKALI METAL COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
DISPERSIONS
EQUIPMENT
GASEOUS WASTES
MIXTURES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
POWER PLANTS
SIZE
SULFUR COMPOUNDS
SULFUR OXIDES
SUSPENSIONS
THERMAL POWER PLANTS
WASTES
200202* - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions
424000 - Engineering- Pollution Control Equipment- (1980-1989)