Back to results
US 4,176,163 AGranted
Sodium oxide fume for sulfur oxide removal
AssigneeCombustion Engineering, Inc.
InventorHugh W. Nelson
Life of this patent
Estimating the term…
Abstract
Sulfur oxides in the flue gases from a glass furnace are converted to sodium sulfate particles by introducing sodium oxide fume into the hot flue gases immediately downstream of the furnace. The fume is generated by forming a bed of carbonaceous material and sodium carbonate that is caused to react under hot reducing conditions. Sodium gas is thereby produced that burns above the bed to produce sodium oxide fume.
Claims11
A method of reducing the sulfur oxide content of flue gases containing sulfur oxides, comprising the steps of:
- a. providing a bed consisting essentially of carbonaceous material and sodium carbonate;
- b. maintaining a reducing environment and a temperature above approximately 1620.degree. F. (880.degree. C.) in the bed, thereby producing sodium gas that rises from the bed;
- c. supplying oxygen to the surface of the bed, thereby allowing the sodium gas to react to produce sodium oxide fume;
- d. adding the sodium oxide fume to the flue gas, thereby converting oxides of sulfur to sodium sulfate;
- and
- e. precipitating the sodium sulfate particles from the flue gas.
3 more elements
Dependencies are inferred from the claim text.