Method and apparatus for reducing sulfur dioxide content in flue gases

Patent · Tue Jul 02 04:00:00 EDT 1991

OSTI ID:5867643

Landreth, R R; Anderson, L R

This patent describes in the combusting of a sulfur-containing fuel in a combustion chamber which is part of a combustion system, a method for reducing the sulfur dioxide (SO{sub 2}) content of the combustion reaction gases. It comprises combusting a sulfur-containing fuel with air in the combustion chamber to produce combustion reaction gases containing sulfur dioxide (SO{sub 2}); introducing, into the combustion chamber, finely divided particles of a material which forms lime upon exposure to the heat in the combustion chamber; forming sulfuric, hydrochloric and nitric acids in the combustion system as a result of the combusting step; neutralizing the acids with the lime so that precipitation of the acids in the combustion system is not a problem; and exhausting the combustion reaction gases from the combustion system at a temperature below the dew point of the acids.

• Assignee: Inland Steel Co., Chicago, IL (United States)
• Patent Number(s): A; US 5027723
• Application Number: PPN: US 7-144714
• OSTI ID: 5867643
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800 -- Combustion
Pyrolysis
& High-Temperature Chemistry
42 ENGINEERING
421000 -- Engineering-- Combustion Systems
54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR POLLUTION CONTROL
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMBUSTORS
CONTROL
DESULFURIZATION
FLUE GAS
GASEOUS WASTES
KINETICS
LIME-LIMESTONE WET SCRUBBING PROCESSES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
REACTION KINETICS
SCRUBBING
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
WASTES