Method of desulfurizing combustion gases
This paper describes a method of desulfurizing gaseous products of combustion. It comprises: burning a sulfur-containing solid fuel within a combustion chamber to produce flyash and combustion gases comprising sulfur dioxide; heating a particulate calcinable compound comprising a compound selected from the group consisting of the carbonates of magnesium, calcium, sodium, and mixtures thereof, in a selected temperature zone within the combustion chamber for a residence time sufficient for calcination of the calcinable compound to its respective oxide, wherein the particle size of the calcinable compound, the selected temperature zone and the residence time are selected to effect calcination of a substantial amount of the calcinable compound to its respective oxide; removing the oxide of the calcinable compound from the combustion chamber; removing the combustion gases from the combustion chamber; forming a slurry comprised of the oxide of the calcinable compound; and treating the removed combustion gases with the slurry to remove a substantial amount of the sulfur dioxide from the combustion gases.
- Assignee:
- Detroit Stoker Co., Monroe, MI (USA)
- Patent Number(s):
- A; US 5006323
- Application Number:
- PPN: US 7-374181
- OSTI ID:
- 5121082
- Country of Publication:
- United States
- Language:
- English
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010800* -- Coal
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20 FOSSIL-FUELED POWER PLANTS
200202 -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
54 ENVIRONMENTAL SCIENCES
540120 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR POLLUTION CONTROL
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
COMBUSTION PRODUCTS
CONTROL
DESULFURIZATION
DISPERSIONS
ENERGY SOURCES
FOSSIL FUELS
FUELS
GASEOUS WASTES
MATERIALS
MIXTURES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
REMOVAL
SLURRIES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SUSPENSIONS
WASTES