Settling recovery device for 1, 1-dimethyl-4, 4-dihydrobipyridine

The utility model discloses a settling recovery device of 1, 1-dimethyl-4, 4-dihydrodipyridyl, which comprises a settling tank, a water inlet on one side of the upper end of the settling tank is connected with a water inlet pipe, a three-way valve and a vacuum pump connected with one end of an outlet of the three-way valve are arranged on a pipeline on the other side of the upper end of the settling tank, and the vacuum pump is connected with the other end of the outlet of the three-way valve. The other end of an outlet of the three-way valve is connected with a nitrogen inlet pipe, a baffle is arranged in the settling tank, a stirrer is installed at the bottom of the settling tank, a sight glass is arranged on the side wall of the lower end of the settling tank, an overflow pipe connected with the settling tank is arranged below the sight glass, and a shoveling pipe connected with the settling tank is arranged below the overflow pipe. According to the paraquat recovery device, the concentration of 1, 1-dimet