Device for producing polyvinyl chloride through multi-kettle continuous polymerization

The utility model discloses a device for producing polyvinyl chloride through multi-kettle continuous polymerization, which comprises a premixing kettle used for initial polymerization reaction and a main polymerization kettle used for main polymerization reaction which are connected with each other, and the premixing kettle is connected to an inlet of the main polymerization kettle through a large-diameter pipeline; an outlet of the main polymerization kettle is sequentially connected to a grading equipment cyclone and a rotary cyclone centrifugal machine through a centrifugal pump, a bottom flow-out pipe of the cyclone is connected with a discharging polymerization kettle used for final-stage polymerization reaction, and an overflow pipeline of the cyclone is connected with the premixing kettle, the backflow polymerization kettle or the main polymerization kettle. According to the utility model, the current PVC batch polymerization process is changed through multi-kettle operation, large-particle PVC in PVC