Air pollution control apparatus
AssigneeMitsubishi Heavy Industries, Ltd.
InventorsTsuyoshi Oishi, Hiroshi Tanaka, Naohiko Ukawa
Life of this patent
Estimating the term…
Abstract
An air pollution control apparatus includes: a denitration unit that removes nitrogen oxides from a flue gas; a desulfurization unit that is installed on a gas flow downstream side of the denitration unit to remove the sulfur oxides in a flue gas 11B; a finish denitration and desulfurization unit that is installed on the gas flow downstream side of the desulfurization unit to perform finish denitration and desulfurization of NO2 and SO2; and a carbon dioxide recovery unit that is installed on the gas flow downstream side of the finish denitration and desulfurization unit to remove and recover the carbon dioxide in a flue gas.
Claims7
An air pollution control apparatus comprising:
- a denitration unit that removes nitrogen oxides from a flue gas up to an extremely low concentration, the flue gas being discharged from a boiler and containing nitrogen oxides, sulfur oxides, and carbon dioxide;
- a desulfurization unit that is installed on a gas flow downstream side of the denitration unit to remove the sulfur oxides in the flue gas up to an extremely low concentration;
- a finish denitration and desulfurization unit that is installed on the gas flow downstream side of the desulfurization unit to perform finish denitration and desulfurization of NO2 having an extremely low concentration and SO2 having an extremely low concentration remaining in the flue gas by an absorbent containing sulfite;
- a SO2 alkali removal unit that is installed on the gas flow downstream side of the finish denitration and desulfurization unit to remove residual SO2 in the flue gas by alkali;
- and
- a carbon dioxide recovery unit that is installed on the gas flow downstream side of the finish denitration and desulfurization unit to remove and recover the carbon dioxide in the flue gas.
Dependencies are inferred from the claim text.