Method for removing sulfur dioxide from gas streams

Details Method for removing sulfur dioxide from gas streams Method for removing sulfur dioxide from gas streams

1991-05-24

1992-04-21

Heller, Gregory A.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

C01B 1700

Patent

active

051066033

ABSTRACT:
A process and apparatus for removing SO.sub.2 from low-volume gas streams containing high concentrations of SO.sub.2 includes a tank scrubber containing an aqueous SO.sub.2 absorbent and an impeller. The impeller includes a vertical rotating shaft having an upper and lower impeller. The lower impeller serves to agitate the SO.sub.2 absorbent. The upper impeller includes a shroud thereby directing the absorbent and gas outwardly toward the wall of the scrubber. The gas is injected into the absorbent at a point below the shrouded impeller. The shroud prevents gas bypass and thereby promotes gas-liquid mixing and, consequently, markedly improves SO.sub.2 removal efficiency.

REFERENCES:
patent: 4099925 (1978-07-01), Yanagioka et al.
patent: 4156712 (1979-05-01), Kanai et al.
patent: 4229417 (1980-10-01), Kanai et al.
patent: 4462969 (1984-07-01), Wilhelm
patent: 4540556 (1985-09-01), Wilhelm
patent: 4911901 (1990-03-01), Ogawa et al.

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