The invention relates to the technical field of molecular
distillation, and discloses an improved column tray packing type rectifying column for molecular
distillation. The column comprises a column body, wherein a discharged material
heat exchanger is arranged on one side of the bottom end of the column body; a
reboiler is arranged on the other side of the bottom end of the column body; a fed material
heat exchanger is arranged on the outer side of the middle of the column body; the middle part of the top end of the column body is communicated with a gas-phase matter
discharge pipe, the otherend of the gas-phase matter
discharge pipe is connected with a column top
heat exchanger, an inner cavity is formed in the column body, a first circulating
pipe is arranged in the inner cavity in a surrounding manner, a plurality of column plates are distributed in the column body from bottom to top, and a central pipe is arranged in the column body and penetrates through the centers of the column trays. According to the rectifying column, heat recycling is achieved, heat preservation of the column body is facilitated, heat loss of the column body is avoided, materials can be preheated, a plurality of steam
layers are conveniently formed in the column body through cooperation of the center pipe and the gas ring, it is guaranteed that steam makes better contact with the materials, and therectifying efficiency of the materials is improved.