Thermal separation method and separation column

Interior and at least one gaseous substance stream, upon pyrolysis between at least one liquid material streams, at least one of the flow contains a (meth) acrylic monomers, with a separating effect mass exchange tray in a separating column which contains a structure, the liquid material flow have been polymerized inhibited, and the are used for the blowing of the inner surface of the separation column, an internal structure in the region of the shadow of the sprayed during the relates pyrolysis method shadow regions is eliminated by the cover.