FIELD: process engineering.
SUBSTANCE: invention relates to heat engineering and may be used in gas cleaning of nitrogen oxides with recovery of acid condensate to nitric acid. Proposed device comprises anion-exchange filter is connected via acid condensate pipeline with flue gas treatment area, while via purified condensate pipeline with condensate hotwell and, via diluted NaNO3 solution, with intermediate tank, pump and concentrator. The latter is connected via steam pipeline with heating steam source and deaerator sluiceway and concentrated NaNO3 solution. Concentrator consists of vertical cylindrical housing with top and bottom covers furnished with branch pipes to accommodate horizontal perforated discs furnished with vertical steam pipes with vertical radial drain channels, apart for bottom disc.
EFFECT: higher efficiency.
2 cl, 4 dwg
