Process for producing finely divided limestone for sulfur oxide removal

Patent · Tue Dec 15 04:00:00 EST 1987

OSTI ID:5328108

Veltman, P L

A dry flue gas desulfurization process is described comprising: (a) dispersing an aqueous media containing finely divided calcium carbonate particulates having a weight average diameter of 10 microns or less in a gas stream containing sulfur oxides; (b) passing the gas stream containing the calcium carbonate particulates to a particle separation zone; and (c) recovering the calcium carbonate particulates from the gas stream substantially free of sulfur oxides, the aqueous media containing finely divided calcium carbonate particulates being produced by a process comprising the steps of: (i) forming a slurry of calcium carbonate in an aqueous media; (ii) adding carbon dioxide from an external source to the slurry; and (iii) abrasively grinding the calcium carbonate in the slurry in the presence of the carbon dioxide to produce the finely divided calcium carbonate particulates.

• Assignee: A/S Niro Atomizer, Soeborg
• Patent Number(s): US 4713226
• OSTI ID: 5328108
• 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
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION CONTROL
ALKALINE EARTH METAL COMPOUNDS
AQUEOUS SOLUTIONS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CARBONATE ROCKS
CARBONATES
CHALCOGENIDES
CHEMICAL REACTIONS
COMMINUTION
CONTROL
DESULFURIZATION
DISPERSIONS
FLUE GAS
GASEOUS WASTES
GRINDING
LIMESTONE
MACHINING
MIXTURES
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PARTICULATES
POLLUTION CONTROL
PRODUCTION
REMOVAL
ROCKS
SEDIMENTARY ROCKS
SLURRIES
SOLUTIONS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SUSPENSIONS
WASTES