the mechanical separator includes a housing 170 defining an internal cavity 175 being the separation chamber a baffle arranged to rotate 185 includes a baffle plate 180 having a plurality of members 190 projecting therefrom the housing includes a plurality of elements 195 projecting from an internal surface so as to in this embodiment intermeshed with the members of the rotating baffle this embodiment further includes a mass transfer device 200 for aiding in the formation of bubbles in the liquid phase so as to facilitate heat and mass transfer by rotating the baffle as liquid is introduced through the liquid distributor 135 the liquid distributor 135 uniformly distributes the liquid as droplets again to aid in heat and mass transfer by increasing surface area the liquid phase is further disrupted by the interaction between the stationary elements 195 and moving members 190 the centrifugal force applied by the rotating baffle forces the liquid through the interlaced elements and members to a periphery of the chamber 175 whereby the liquid phase is eventually passed through a liquid outlet 165 the gas within the feed stream however is subject to a vortex arrangement and so biased into the central portion 207 of the rotating baffle whereupon it is vented through the gas outlet 160 fig5 shows a detailed view of the liquid phase path as it passes through the interlaced stationary elements 195 and moving members 190 of the rotating baffle the mass transfer device 200 further impedes the liquid phase flow 230 tending to collect liquid 235 and forming bubbles 240 as a result of the consequential turbulence in this way the mass transfer devices aid in the heat and mass transfer to further boil the.