FIELD: chemical industry. SUBSTANCE: apparatus has refrigerator-condenser, absorption column and purging column, with mentioned parts being connected in the processing course through pipelines, and is further provided with successively arranged desorber, mixer, and pump, which are positioned downstream of absorption column having strainer-type plates. Desorber is connected to absorption column through feeding line for feeding nitric acid from the top of fifth plate. Gas pipeline of desorber is connected to line for feeding nitrose gas from purging column into absorption column and air pipeline is connected to air feeding line for feeding air into purging column. Mixer is further equipped with water steam condensate feeding line. Pump inlet end is connected to absorption column top part through two pipes for feeding diluted nitric acid. EFFECT: increased efficiency of equipment and reduced labor intensity for purifying exhaust gases from nitric acid. 1 dwg
| Title | Year | Author | Number |
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