An NMP rectification system

Abstract

The application belongs to the technical field of NMP production, and particularly relates to an NMP rectification system, which comprises a first dehydration tower, a second dehydration tower, a rectification tower and a distillation tower, the above devices are sequentially communicated, a liquid inlet pump is connected to a feed inlet of the first dehydration tower, a tower plate and an adsorption mechanism are arranged in the rectification tower, and the adsorption mechanism is located above the tower plate; the adsorption mechanism comprises a baffle, activated carbon layers, steel wires, hinged points and bearing pieces, the activated carbon layers are provided in plurality, one end of the activated carbon layers is rotationally connected with the hinged points, the other end of the activated carbon layers are fixedly connected with each other through the steel wires, the hinged points are fixedly connected with the rectification tower, one end of the baffle is rotationally connected with the rectification tower, the other end of the baffle is matched with the activated carbon layers, the bearing pieces are fixedly connected with the rectification tower, and the bearing pieces are matched with the activated carbon layers. The adsorption mechanism improves the adsorption effect on free amine, and simultaneously solves the problems that the adsorption effect is poor due to too thin packing, and the utilization rate is low due to too thick packing.

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