A technological scheme is given for removing hydrochloric acid vapor from air together with the parameters of the plant operation with Venturi tubes and air flow up to 76000 m3/h. With an initial content of hydrochloric acid in air of 250 mg/liter, the final content is as follows: with the solution in the etching bath at 60-70°C it is 1.5 mg/m3, while at 80°C it is not more than 5 mg/m3.