Dry scrubbing oxides and particulate contaminants from hot gases

Patent · Tue Mar 12 04:00:00 EST 1985

OSTI ID:5489054

Quee, J A; Haak, M P

Sulfur dioxides are dry scrubbed from a flue gas by introducing minute droplets containing a liquid, such as water, and an alkali or alkaline reactant, such as lime, into the spray zone in the primary spray drying chamber of a spray dryer and concurrently contacting these droplets with the hot flue gas. The droplets are partially dried to a tacky condition before reaching a foraminous collecting member extending through the primary spray drying chamber and collect on the collecting member as a moist, porous mat. As the flue gas continues to flow through the mat, the mat serves as a filter for removing fly ash and other particulate matter and remaining sulfur oxides react with unreacted particles of the reactant and reactive ingredients of the fly ash particles in the mat.

• Assignee: Dec International Inc.
• Patent Number(s): US 4504451
• OSTI ID: 5489054
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AEROSOL WASTES
AIR POLLUTION CONTROL
ASHES
CARBONATE ROCKS
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
DEASHING
DESULFURIZATION
DROPLETS
FLUE GAS
FLY ASH
GASEOUS WASTES
HYDROGEN COMPOUNDS
LIMESTONE
OXIDES
OXYGEN COMPOUNDS
PARTICLES
POLLUTION CONTROL
REMOVAL
RESIDUES
ROCKS
SCRUBBING
SEDIMENTARY ROCKS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
WASTES
WATER