A method for efficient degassing and concentration enrichment in carbon fiber production and polymerization process

Abstract

The application discloses a device and a method for high-efficient deaeration and concentration of a carbon fiber production polymerization process. The high-efficient deaeration and concentration device of the carbon fiber production polymerization process comprises a deaeration kettle, a filler layer is arranged in the deaeration kettle, and a reboiler is connected to a position near the bottom of the deaeration kettle, a polymerization solution is introduced into the upper of the filler layer in the deaeration kettle, and the polymerization solution flows from top to bottom. According to the method, dimethylsulfoxide is introduced into the reboiler which is arranged below the deaeration kettle, so that the dimethylsulfoxide is flashed under vacuum into the deaeration kettle, flows from bottom to top, and is in reverse contact with the polymerization solution; the filler, material distributors and all the tower internals in the deaeration degassing kettle are soaked by dimethylsulfoxide vapor, so that the generation of gel is effectively prevented. In the preferred embodiment, due to the presence of filament-shaped spinning liquid above a distribution disk, the filler layer and the gas distribution tube, a very good mass transfer interface is provided, which is particularly suitable for high-load continuous production.

Description

technical field [0001] The invention belongs to the technical field of carbon fiber production, and in particular relates to a high-efficiency defoaming and concentration-enhancing device and method for a carbon fiber production and polymerization process. Background technique [0002] In the process of carbon fiber production and polymerization, the bubbles in the polymerization solution are not easy to remove, and the residual bubbles will cause broken filaments and affect the quality of carbon fibers. Therefore, the polymerization solution must be degassed and concentrated. [0003] Many enterprises use external auxiliary means to improve the defoaming efficiency of the polymerization stock solution, but the degassing operation under long-term vacuum conditions, the solvent on the surface of the polymerization solution is easy to remove and gradually gel, or produce gel, which affects the quality of the polymerization solution. For example, CN101856570B provides an ultras...

AI Technical Summary

Problems solved by technology

[0008] (2) It is difficult to quantitatively control the concentration of the polymerization solution after degassing;

[0009] (3) The homogeneity of the polymerization solution is poor;

[0010] (4) Intermittent operation, unable to achieve high-load continuous production

Images