Energy-saving polymerization reaction kettle

The utility model discloses an energy-saving polymerization reaction kettle, which belongs to the field of reaction containers, and comprises a kettle body, a jacket is fixedly arranged outside the kettle body, the jacket wraps the lower end and the side wall of the kettle body, the top end of the kettle body is fixedly connected and communicated with a liquid inlet pipe, the liquid inlet pipe is provided with a first soft sealing valve, the top end of the kettle body is provided with a feed inlet, and the upper end of the feed inlet is provided with a flange sheet. An end cover is detachably connected to the flange piece and is of a double-layer heat preservation structure, a heat preservation layer is arranged at the top end of the kettle body, a heat preservation cavity is formed between the heat preservation layer and the kettle body, a heat preservation sleeve is fixedly arranged outside the jacket, and a cavity is formed between the heat preservation sleeve and the jacket. The device has the effects tha