METODE PENGONTROL KECEPATAN ALIRAN GAS PADA PERALATAN POLIMERISASI FASA GAS DAN PERALATAN POLIMERISASI FASA GAS

摘要

PROBLEM TO BE SOLVED: To realize that a flow rate control of a gaseous monomer to blow into a fluidized bed reactor in a polymerization time can be carried out with not only exactly followed gas situation in the fluidized bed reactor but also good responsibility and small pressure loss. ;SOLUTION: This gas-phase polymerization plant involves a pressure difference detection part 31 to measure a pressure difference of a gaseous monomer between an inlet side and outlet side of a blower 8; and a flow rate control part 33 installed with a CPU 34 to calculate a revolution of the blower impeller in order to obtain a desired gas flow rate Q, on the basis of a characteristic curve of the blower 8, from a parameter H which is calculated on the basis of the pressure difference obtained by the pressure difference detection part 31 and the density of the gaseous monomer and with a blower control part 35 to control the revolution of a blower impeller of the blower 8 with depending on the revolution obtained by the CPU 34.;COPYRIGHT: (C)1999,JPO