Flue gas scrubbing process using fly ash alkali

Details Flue gas scrubbing process using fly ash alkali Flue gas scrubbing process using fly ash alkali

1979-03-06

1980-10-14

Vertiz, O. R.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

C01B 1700

Patent

active

042281393

ABSTRACT:
There is disclosed a fly ash utilization system and process for the removal of sulfur dioxide from the flue gas of coal fired boilers. The principal features of the invention are the maintaining of high ionic concentration in a closed loop, water balanced system which is operated at a low pH, i.e. less than 4 and preferably less than 3. The ionic concentration of the scrubber slurry is maintained at at least 5,000 parts per million of alkali metal cations, preferably over 10,000 parts per million, at least a substantial portion of which has been leached from fly ash.

REFERENCES:
patent: 4002724 (1977-01-01), McKie
patent: 4080428 (1978-03-01), Holter et al.

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