Air pollution control process and apparatus

Patent · Tue Apr 20 04:00:00 EST 1982

OSTI ID:5161071

Genco, J M; Rosenberg, H S

An improved combination wet absorber/spray-dry dry wastes collection air pollution control process and apparatus is described which employs aqueous solutions of sodium or ammonium alkali sorbents injected in an absorber through which SOx-containing flue or process gases containing fly ash are passed. Fly ash is collected in the absorber wherein the alkali reacts with the SOx to form sodium and ammonium sulfur oxide salts. Liquor containing collected fly ash in slurry form is passed back upstream and injected into a spray dryer through which the gases pass. The heat of the gases in the spray dryer dries the slurry to a powder of salts and fly ash which is removed. The spray dryer simultaneously provides some added preliminary SOx removal.

• Assignee: Industrial Resources, Inc.
• Patent Number(s): US 4325713
• OSTI ID: 5161071
• 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
ABSORPTION
AEROSOL WASTES
AIR POLLUTION CONTROL
ALKALI METAL COMPOUNDS
AMMONIUM COMPOUNDS
AQUEOUS SOLUTIONS
ASHES
CHALCOGENIDES
CHEMICAL REACTIONS
CLEANING
CONTROL
COUNTER CURRENT
DESULFURIZATION
DISPERSIONS
DRYING
FLUE GAS
FLY ASH
FOSSIL-FUEL POWER PLANTS
GASEOUS WASTES
MIXTURES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POWER PLANTS
REMOVAL
RESIDUES
SLURRIES
SODIUM COMPOUNDS
SOLUTIONS
SORPTIVE PROPERTIES
SPRAY DRYING
SULFUR COMPOUNDS
SULFUR OXIDES
SURFACE PROPERTIES
SUSPENSIONS
THERMAL POWER PLANTS
WASTES