Process for removal of undesirable gaseous components from hot f

Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Sulfur or sulfur containing component

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55 73, C01B 1700, B01D 1900, B01D 3900, B01D 5700

Patent

active

046595538

ABSTRACT:
The invention refers to a process for the removal of undesirable gaseous components from hot flue gases incurred in the combustion of carbonaceous fuels. The flue gas is passed through regenerators for cooling and preliminary cleaning, and subsequently is scrubbed with a physically active solvent for SO.sub.2 absorption. After absorbing SO.sub.2, the solvent is subjected to regeneration and returned to the scrubbing process. For purposes of energy savings, it is suggested to heat exchange the hot flue gas in the regenerators with atmospheric air to cool it to temperatures between 0.degree. and 60.degree. C., and to scrub at this temperature with a solvent consisting predominantly of tetraethyleneglycol dimethylether. The process of the invention permits utilization of the exhaust heat of the flue gas to be purified.

REFERENCES:
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patent: 2676872 (1954-04-01), Viard
patent: 3503186 (1970-03-01), Ward, III
patent: 3533732 (1970-10-01), Moore et al.
patent: 3681015 (1972-08-01), Gelbein et al.
patent: 3966825 (1976-06-01), Bratzler
patent: 4113849 (1978-09-01), Atwood
L. F. Albright et al., Chemical Engineering Progress Symposium Series 44, vol. 59, 66 (1963).

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