Method using lime slurry for regenerating sodium sulfite in double alkali flue gas desulfurization process
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
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
200202* -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
42 ENGINEERING
424000 -- Engineering-- Pollution Control Equipment-- (1980-1989)
AIR POLLUTION CONTROL
ALKALI METAL COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
DESULFURIZATION
DISPERSIONS
EQUIPMENT
FLOW RATE
FLUE GAS
FOSSIL-FUEL POWER PLANTS
GASEOUS WASTES
MIXTURES
OPERATION
OXIDES
OXYGEN COMPOUNDS
PARTICLE SIZE
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
POWER PLANTS
RECYCLING
REGENERATION
SCRUBBERS
SIZE
SLURRIES
SODIUM COMPOUNDS
SULFITES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SUSPENSIONS
THERMAL POWER PLANTS
WASTES