Removal of acid gases in dry scrubbing of hot gases

Patent · Tue Sep 12 04:00:00 EDT 1989

OSTI ID:5465244

Lerner, B J

This patent describes a method for the removal of sulfur oxide gases from a flue gas containing the same. The method comprising: dispersing finely-divided dry hydrated lime in a humid inert gas having a relative water vapor pressure higher than the fugacity of at least a monomolecular layer of water thereby adsorbed on the hydrated lime; bringing the dispersed hydrated lime and adsorbed water into contact with gaseous carbon dioxide thereby converting surfaces of the lime to calcium carbonate; flowing the dispersion of so-carbonated lime into admixture and reactive contact with the fluid gas to form calcium sulfite and sulfates from sulfur oxides in the flue gas; subsequently removing solids including reacted calcium sulfite and sulfate and excess reactants from the so-treated flue gas and discharging so-purified flue gas to the atmosphere.

• Assignee: NOV; EDB-90-000097; NOV-89-081055
• Patent Number(s): US 4865828
• Application Number: PPN: US 7250219A
• OSTI ID: 5465244
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800* -- Coal
Lignite
& Peat-- Waste Management
20 FOSSIL-FUELED POWER PLANTS
200202 -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
CHALCOGENIDES
CHEMICAL REACTIONS
DESULFURIZATION
FLUE GAS
GASEOUS WASTES
OXIDES
OXYGEN COMPOUNDS
REMOVAL
SCRUBBING
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
WASTES