Method and system for separating hydrofluoric acid or/and nitric acid

The invention relates to a method for separating hydrofluoric acid or/and nitric acid, which comprises the following steps: S1, conveying a solution to be separated in a first storage tank into a pretreatment system, and conveying a precipitator in a second storage tank into the pretreatment system; s2, conveying filtrate in the pretreatment system into a rectification system, conveying non-condensable gas in the rectification system into an absorption system, and conveying a rectification product in the rectification system into a post-treatment system; and S3, respectively conveying separated products in the post-treatment system into a third storage tank and a fourth storage tank, so as to obtain separated hydrofluoric acid or/and nitric acid and purified water. According to the method and system for separating hydrofluoric acid or/and nitric acid, fluosilicic acid is separated out through the precipitator, hydrofluoric acid or/and nitric acid is obtained through rectification, the purity of hydrofluoric a