Flue gas scrubbing process for sulfur dioxide and particulate emissions preceding CO/sub 2/ absorption

Conference · Wed Jan 01 00:00:00 EST 1986

OSTI ID:5655113

Brady, J D

This paper describes a 2-stage scrubbing process which utilizes sodium hydroxide or sodium carbonate as the neutralizing chemical for sulfur dioxide and sulfur trioxide emissions to remove contaminants from gas streams preceding CO/sub 2/ absorption processes. Amine absorption processes are adversely affected by sulfur dioxide in the gas stream, and it is desirable to reduce sulfur dioxide concentrations to less than 5 ppm (vol). Conventional flue gas desulfurization processes do not achieve outlet concentrations at this level. With appropriate controls on pH, ionic strength, and liquid recirculation rates, the sodium alkalies can achieve these outlet concentrations. When concentrations of sulfur dioxide absorbed become sufficiently large to make the economics of a simple throw-away process uneconomical, the waste solutions can be regenerated in the double-alkali process by reacting them externally from the scrubbing system with calcium compounds. This process is also described. Particular emphasis is placed on process design for reliability.

• OSTI ID: 5655113
• Report Number(s): CONF-860447-
• Resource Relation: Conference: American Institute of Chemical Engineers spring national meeting, New Orleans, LA, USA, 6 Apr 1986
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
CARBON DIOXIDE
ABSORPTION
FLUE GAS
DESULFURIZATION
SCRUBBING
PARTICULATES
AIR POLLUTION ABATEMENT
SULFUR DIOXIDE
AMINES
CALCIUM COMPOUNDS
ECONOMICS
EMISSION
IONIC COMPOSITION
LEADING ABSTRACT
LIQUID FLOW
MEETINGS
PH VALUE
QUANTITY RATIO
REGENERATION
RELIABILITY
SODIUM CARBONATES
SODIUM HYDROXIDES
SULFUR TRIOXIDE
ABSTRACTS
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CARBON COMPOUNDS
CARBON OXIDES
CARBONATES
CHALCOGENIDES
CHEMICAL REACTIONS
DOCUMENT TYPES
FLUID FLOW
GASEOUS WASTES
HYDROGEN COMPOUNDS
HYDROXIDES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PARTICLES
POLLUTION ABATEMENT
SODIUM COMPOUNDS
SULFUR COMPOUNDS
SULFUR OXIDES
WASTES
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)