The invention discloses a packed
tower for PET alcoholysis solution purification, a purification
system and a purification process, the packed
tower comprises a
tower body, the top of the tower body is provided with a feed port, and the bottom of the tower body is provided with a
discharge port; a double-fluid atomizing
nozzle is arranged at the top in the tower body, the double-fluid atomizing
nozzle is provided with a liquid inlet and an air inlet, and the liquid inlet of the double-fluid atomizing
nozzle is communicated with a feeding hole in the top of the tower body; a gradient functional filler layer is arranged in the middle of the tower body and comprises a
catalytic oxidation section filler layer and a
metal adsorption section filler layer from top to bottom; an
ozone distribution disc is arranged at the bottom in the tower body, and an
ozone inlet is formed in the side wall of the tower body and positioned below the
ozone distribution disc. According to the invention, decolorization and demetalization can be synchronously completed in a single tower, the decolorization rate is greater than or equal to 99.5%, the residual quantity of
metal ions is less than or equal to 5ppm, and the
loss rate of BHET is extremely low.