Spinning solution continuous solidification device and control method thereof

Abstract

The invention provides a spinning solution continuous solidification device and a control method thereof. A solidification process is carried out in the same section of a solidification bath groove; by changing the flow of materials of an inlet and an outlet of a solidification bath, the temperature of a temperature control water pipe in the solidification bath and a stirring speed of a magnetic stirrer, the concentration of the solidification bath in the groove is controlled to have gradient distribution and is rapidly balanced; a solidification bath solution in the groove can reach the dynamic balance of the concentration through the supplementation of a newly-prepared solution in a solidification bath preparation tank, and the free dispersion of the solution in the groove, and the gradient distribution of the concentration of the solidification bath solution is realized. The spinning solution continuous solidification device has the advantages that continuous solidification of a polyacrylonitrile solution is realized and the concentration of the solidification bath has the gradient distribution; a multi-grade solidification technology is set to be one-grade solidification, so that the refining of equipment is realized and the structure is simple; and the spinning solution continuous solidification device can continuously produce on a production line, is simple to operate and has strong practicability and low production cost.

Description

technical field [0001] The invention relates to a spinning coagulation technology, in particular to a spinning liquid continuous coagulation device and a control method thereof. Background technique [0002] Carbon fiber has many excellent properties such as low density, high specific strength, high specific modulus, high temperature resistance and corrosion resistance, and has been widely used in various fields of aerospace, national defense and civilian industries. According to the classification of raw materials, carbon fiber can be divided into three types: polyacrylonitrile (PAN)-based, asphalt-based and viscose-based. Among them, PAN-based carbon fiber has become a carbon fiber with the fastest development, the highest output, the most varieties and the widest application due to its simple production process, low production cost and excellent mechanical properties. [0003] At present, the PAN precursor spinning process mainly includes wet method and dry-wet method. A...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problems of poor coagulation effect of multi-stage sections in the prior art, large differences in the radial structure of primary fibers, high cost and complicated production process, etc., and propose a continuous coagulation device for spinning solution and its control method. Its structure is simple, easy to operate, and can be applied industrially. The present invention adopts one-stage coagulation to adjust the concentration distribution of the solution in the coagulation bath by changing the structure of the coagulation bath and the way the coagulation bath solution enters and exits the material, and regulates the fiber double diffusion process. Coagulation to obtain primary fibers with uniform and dense structure

Images