Treatment device capable of detecting, filtering and purifying impurities in NMP (N-Methyl Pyrrolidone) solvent

Abstract

The invention discloses a treatment device capable of detecting, filtering and purifying impurities in an NMP (N-Methyl Pyrrolidone) solvent, which comprises a base, a clamping cover, a visual detection sensor, a supporting seat, a containing barrel, a flow guide pipe, an infrared liquid detector, a first stepping motor, a fixing plate, a screw rod, an adjusting block, a filtering seat, a containing groove, an adjusting barrel, a filtering pad, a mounting plate and a second stepping motor. Firstly, through the visual detection sensor and the infrared liquid detector, the impurity capacity of the filtering pad can be conveniently detected, workers can conveniently clean the filtering pad in time, and impurities in the NMP solvent can be analyzed. Secondly, by means of a rotary filtering mechanism, the impurities are filtered, and switching of filtering of different pore diameters can be achieved according to analysis of the infrared liquid detector. Finally, the first stepping motor drives the screw rod to realize leftward sliding of a filtering seat, the containing groove and the adjusting barrel can be exposed, a worker can replace and clean the filtering pad conveniently, and the problem of blockage caused by long-term use is avoided.

Description

technical field [0001] The invention relates to the technical field of chemical production, in particular to a treatment device capable of detecting, filtering and purifying impurities in NMP solvent. Background technique [0002] With the upgrading of my country's industry, all walks of life have higher and higher requirements for the quality of products and the purity of raw materials. NMP (N-methylpyrrolidone) is used as a solvent for lithium-ion battery cathode slurry, accounting for 40% of the slurry weight formula. It is recovered by a recovery device in the coating pole piece process, and then returned to the NMP factory for re-purification. Impurities in NMP finished products include: organic residual products and reaction by-products, residual moisture, free amine, non-metallic foreign matter in the preparation process, metal foreign matter in the preparation process, etc. These impurities directly affect the production process and battery performance of lithium-ion...

AI Technical Summary

Problems solved by technology

[0004] 1. The lack of detection during the filtration process makes it inconvenient to detect the impurity content in the NMP solvent, which affects the judgment of the staff and subsequent operations

[0005] 2. The filtered impurities are easy to accumulate in the equipment, which is not only difficult to clean up, but also prone to blockage, and it is also inconvenient to detect, and the staff cannot grasp it in time

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