The invention provides a recovering treatment method of
wastewater containing
fluorine and
nitric acid. The methodcan be used for treating
fluorine-containing
nitric acid wastewater and recovering
fluorine ions and
nitrate ions in the fluorine-containing
nitric acid wastewater, and comprises the following steps: 1, introducing fluorine-containing nitric acid wastewater into a reaction tank, adding
calcium carbonate, and stirring until the solution is neutral; 2, introducing into a primary
settling tank,
settling for 2-4 hours, filtering the supernatant, introducing into a secondary
settling tank, putting the
sludge into a
filter press, carrying out filter pressing, introducing the filtrate obtained by filter pressing into the secondary settling tank,
drying the
filter cake, and recovering; 3, adding a flocculating agent into the secondary settling tank, settling for 2-4 hours, filtering supernate, introducing the supernate into a
distillation kettle, carrying out reduced pressure
distillation, and discharging flocculated
sludge for treatment; and 4, introducing a
solid-liquid mixture obtained after
distillation into a centrifugal
machine, separating, refluxing a liquid obtained after
centrifugation to the distillation kettle,
drying solid particles, and then introducing into a
calcium nitrate collecting tank for collecting.