Electrodialysis technology for exacting semi fibers by using viscose fiber pressed alkali liquor as raw materials

The invention provides an electrodialysis technology for exacting semi fibers by using viscose fiber pressed alkali liquor as raw materials. The technology is characterized in that the pressed liquor produced by viscose fibers is firstly processed in a pre-filter manner to remove impurities with large particles, the penetrated liquor is concentrated two to four times in a circulating manner through a nano filter film, the final concentrated liquor is sent into the electrodialysis membrane pile, the alkali liquor in an anode chamber is recycled to obtain the concentrated liquor of the pressed liquor, and acid is added into the concentrated liquor to neutralize to obtain semi fiber liquor; the nano filter membrane is concentrated two to four times in a circulating manner, and before filtration each time, the material liquor is diluted by adding the water to enter the nano filter film. The alkali containing concentration of the obtained semi fiber liquor is low, the salinity is low, the purity of the semi fibers is high, the operating efficiency of the technology is high, and the technology is suitable for mass production.