The study of gas dynamics and deposition coefficients of the separating profile has been performed. The three-dimensional model of working channels of the ship systems for air purification from droplet moisture is developed. The distribution of velocity, static pressure, dynamic pressure, kinetic energy of turbulence, and deposition coefficients for the flow rates of 5, 10, 15, 20 m/s in separating profiles with the radii of 5, 10, 15, 20, 25 mm.