Roter thin-film evaporator

Claim 1

A rotor thin-film evaporator comprising: a cylindrical casing with an inner heat-exchange surface; heating jackets mounted outside the casing; a rotor including a shaft; a plurality of crimped drums arranged successively along said shaft; bosses rigidly secured to said shaft, each of said crimped drums being secured to said bosses; each of said drums having peripheral surfaces with perforations therein for ejecting liquid fed to the crimps of said drums to the heat-exchange surface of said casing whereat steam is generated by vaporization of some of said liquid; an annular clearance being provided between the outer surface of each of the drums and the heat-exchange surface of the casing; means for uniformly distributing inlet liquid over the inner surface of the crimp bulges of the uppermost drum comprising a plate secured to the shaft of said rotor and covering the interior space of the drum from the top such that the steam is constrained to pass through said annular clearance; means for uniformly distributing liquid received from the uppermost drum successively to the inner surface of the crimp bulges of each of the lower drums; means for separating liquid drops from the stream of steam and liquid coming from said annular clearance at said uppermost drum comprising a section disposed between adjoining drums and including blades extending vertically and radially and having curvilinear cross-sections with vertical outer edges bent inwardly for discharge of separated liquid from the blades to said means for distributing the liquid to the inner surface of the crimp bulges of the lower drum while directing steam separated from liquid into the drum cavity.