Production of large polymerizer from poly(vinyl chloride) resin by suspending polymerization

The utility model discloses a large-scale polymerizer for PVC resin production with suspension polymerization, and is characterized in that the top of the rack 11 is provided with a kettle 14 with suitable slenderness ratio, and a half-pipe jacket 17 with semi-circle cross section is connected with the spiral on the ektexine of the straight reach of the cylinder in the kettle 14; a spiral diversion jacket 21 is connected with the bottom end of the kettle14; the mixing vertical shaft 16 inside the kettle is connected with a two-layer threeleaf paddle stirrer15, a scraper 13 is fixedly connected with the lower part of the vertical shaft 16 ; the bottom of the kettle is provided with a mechanical seal device 12, a transmission shaft 10, a shaft joint 8 and a subtracting machine 7 driven by a motor 1 ; a plurality of inner cooling coils 20 is connected with the inner of the kettle 14, the top of the kettle is provided with a condenser 19 in vitro. The utility model has the advantages of capaciousness, high yield; good heat transfer capacity, non-stick kettle and low maintenance cost, stable transmission, effective agitation, and good shape in grains of PVC resin, even distributed molecular weight, high absorption rate and less black spots and yellow spots.