DISTILLATORY COLUMN HAVING BUBBLE CAP TRAY FOR DISCHARGING PITCH EASILY

摘要

PURPOSE: Provided is a distillatory column having a bubble cap tray which easily discharges pitch generated from the distillatory column. CONSTITUTION: The distillatory column comprises discharge grooves formed on the bottom of a multistage bubble cap tray(10) to collect pitch (P), drain nozzles(15) respectively connected to the discharge groove to discharge the pitch to the outside of the distillatory column, a separating port(20) collecting the pitch inside through an unifying pipe(17) connecting each drain nozzle and a screw pump(50) transferring the precipitated pitch on the lower part of the separating port to an outside wastewater treating device.