COMPLEX METHOD AND DEVICE FOR CLEANING AND UTILIZATION OF FLUE GASES Russian patent published in 2005 - IPC

FIELD: heat-power engineering; cleaning flue gases from toxic admixtures.

SUBSTANCE: proposed method includes cooling of flue gases to temperature below dew point, condensation of water vapor, mixing of cooled flue gases with ozone-and-air mixture, oxidation and absorption of nitrogen oxides and sulfur oxides by condensate thus obtained and discharge of cleaned flue gases and condensate from zone of treatment. Flue gases and acid condensate are cleaned from carbon dioxide in perforated units of cassettes coated with layer of slaked lime [Ca(OH0₂] for forming calcium nitrite [Ca(NO₃)], calcium carbonate (CaCO₃) and calcium nitrate [Ca(NO₃)]. Device proposed for realization of this method includes zone of treatment in form of box with heat-exchange and absorption-and-heat exchange sections located in this box in way of motion of flue gases. These sections are provided with air and flue gas inlet and outlet branch pipes where heat exchangers-air preheaters of 1^st and 2^nd stages, horizontal and vertical perforated cassettes units made from rough corrosion-resistant material coated with layer of slaked lime [Ca(OH₂)], mixing chamber with perforated distributing tube and air duct with ozonizer are located.

EFFECT: enhanced ecological and economical efficiency and reliability.

3 cl, 1 dwg