DEVELOPMENT OF ONLINE AUTOMATIC ANALYZER FOR INTERFACIAL POLYMERIZATION REACTOR IN POLYCARBONATE PLANT

An on-line automatic analyzer system for an interfacial polymerization polycarbonate polycondensation reactor has been developed. This analy zer system has two analyzer units, which are respectively set up for t wo sections in polycarbonate plant, and moreover the analyzer controll ing system atilizes DCS (Distributed Control System). One analyzer uni t is applied for checking oligomer in the first polycondensation react or and the other is applied for measuring the unreacted raw material i n the second polycondensation reactor. These analyzer units take advan tage of titrators, and these units include hydrolysis of oligomer, was hing of the beaker and, electrode sensor, and are operated by fully au tomatically. Accuracy of the data obtained by the on-line automatic an alyzers is equivalent to that of the conventional manual operation. Th e measured data are calculated by DCS to make the analyzer controlling system manipulate raw material control valves. This system contribute s to the stability of quality control, operation, labor saving and imp rovement of safety of the plant.