OLEFIN FREE RADICAL POLYMERIZATION METHOD AND OLEFIN FREE RADICAL POLYMERIZATION APPARATUS

The present invention relates to the field of high-pressure olefin polymerization, and in particular to an olefin free radical polymerization method and an olefin free radical polymerization apparatus. The method comprises: respectively introducing, into at least two tubular reactors connected in parallel, at least two reactive monomer streams containing olefin sources, respectively performing one-stage high-pressure polymerization, and then making one-stage high-pressure polymerization products flow into one or more tubular reactors which are sequentially connected in series, so as to perform multi-stage high-pressure polymerization, wherein at least one stream of free radical polymerization initiator is introduced to participate in the one-stage high-pressure polymerization and/or the multi-stage high-pressure polymerization, and the pressure of each reactive monomer stream is greater than or equal to 100 MPa. In the present invention, reactive monomer streams containing olefin sources are introduced into a