Process for desulfurization of flue gases

Details Process for desulfurization of flue gases Process for desulfurization of flue gases

1991-11-19

1993-09-21

Heller, Gregory A.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

42324301, 42324308, B01J 800, C01B 1700

Patent

active

052466809

ABSTRACT:
Process and apparatus for removal of sulfur oxides from flue gases.
In the process, a NaOH solution is injected into flue gases containing calcium oxide so that the formed reaction products are discharged from the reactor in a dry dust-like form together with the flue gases, whereafter the solids present in the flue gases are separated from the flue gases, mixed with water and sodium so as to form a sodium hydroxide solution wherefrom the other reaction products in solid form can be removed, the sodium hydroxide solution being returned to the flue gases.
The apparatus comprises a desulfurization reactor (3) wherein a sodium hydroxide solution is injected into the flue gases, and an electrostatic precipitator (5) wherein the dust-like solids are separated from the flue gases. The apparatus further comprises a mixing reactor wherein the solids are mixed with water and additional sodium, and a filter (10) wherein the solids produced in the reaction are separated from the formed NaOH solution which is returned to a nozzle (11a) for injection into the reactor (3).

REFERENCES:
patent: 4081513 (1978-03-01), Moss
patent: 4559211 (1985-12-01), Feldman et al.
patent: 4600568 (1986-07-01), Yoon et al.
patent: 4604269 (1986-08-01), Yoon
patent: 4753785 (1988-06-01), Kisters

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