Sodium-limestone double alkali flue gas desulfurization process with improved limestone utilization

Patent · Tue Aug 18 00:00:00 EDT 1987

OSTI ID:6247446

Biolchini, R J; Boward, Jr, W L; Wang, K H

This patent describes a sodium-limestone double alkali process for the continuous desulfurization of flue gas, having the steps of absorbing sulfur dioxide from an SO/sub 2/-containing gas stream in an absorber with an aqueous solution of sodium sulfite and sodium bisulfite, diverting at least a portion of the absorber effluent solution for regeneration with limestone, introducing limestone into the diverted absorber effluent solution to convert bisulfite to sulfite, separating by-product solids from the limestone-treated solution, and returning regenerated solution to the absorber, the improvement for increasing the utilization of the limestone used during the regeneration operation.

• Assignee: FMC Corp., Philadelphia, PA
• Patent Number(s): US 4687648
• OSTI ID: 6247446
• Resource Relation: Patent File Date: Filed date 24 Jun 1986
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
FLUE GAS
CEA-ADL DUAL ALKALI PROCESS
SULFUR DIOXIDE
ADSORPTION
AIR POLLUTION CONTROL
AQUEOUS SOLUTIONS
BY-PRODUCTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
DESULFURIZATION
GAS FLOW
LIMESTONE
RECYCLING
REGENERATION
SLURRIES
SODIUM
SODIUM COMPOUNDS
SOLIDS
SULFITES
ALKALI METAL COMPOUNDS
ALKALI METALS
CARBONATE ROCKS
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
DISPERSIONS
ELEMENTS
FLUID FLOW
GASEOUS WASTES
KINETICS
METALS
MIXTURES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
REACTION KINETICS
ROCKS
SEDIMENTARY ROCKS
SOLUTIONS
SORPTION
SULFUR COMPOUNDS
SULFUR OXIDES
SUSPENSIONS
WASTES
YIELDS
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)