Nozzle mass exchange apparatus comprises a vertical housing, light and heavy phase inlet and outlet fittings, at least one horizontal grid with vertical rods fixed therein at their lower ends, on which spacer elements are located, between which, with a gap between each other and with the possibility of movement along and around the corresponding vertical rods, packed bodies of a streamlined shape are installed. The vertical rods on the upper free sections are fastened together by longitudinal horizontal elements with holes for interaction with the specified upper free sections of the vertical rods