METHOD AND APPARATUS FOR DISCHARGING POLYMERIZATION REACTORS

摘要

A method and an apparatus of discharging polymer from a continuously operate d gas phase reactor, wherein at least one monomer is polymerized in a bed containing active catalyst formed by catalyst and polymer particles suspende d in a fluid, the bed defining a fluidized bed level in said reactor. The invention comprises continuously withdrawing polymer powder from the reactor ; and adjusting the discharge rate of the polymer powder so as to maintain a constant bed level during polymerization. By means of the invention the discharge of the polymer can be made truly continuous without any disturbanc e of the polymerization. The rate of withdrawn polymer can be flexibly adjuste d depending on the progress of the polymerization and it can also easily be scaled up if the capacity of the reactor is increased.