The invention discloses a treatment method of
fluoride-containing
wastewater, the
fluoride-containing
wastewater is treated by a
wastewater treatment
distillation system, the wastewater treatment
distillation system includes a
distillation kettle, a filling rectifying
tower, a condenser and a liquid reservoir, and the method is as follows: the
fluoride-containing wastewater is led in from a wastewater inlet of the distillation kettle, at the same time a water absorption
solvent is led in from a
solvent inlet,
hydrogen fluoride is collected from a gas outlet, and when the
tower top temperature of the filling rectifying
tower is higher than the
hydrogen fluoride collecting temperature, the collecting is stopped; the distillation kettle temperature is gradually increased to 80-150 DEG C, under the pressure of 0.110-0.120MPa,
trifluoroacetic acid is collected from the gas outlet, and when the tower top temperature of the filling rectifying tower is higher than the
trifluoroacetic acid collecting temperature, the collecting is stopped; the treatment method is good in separation effect, the product purity is high, the
hydrogen fluoride
recovery rate is up to 98.6%, the product purity can reach 99.9%, the
trifluoroacetic acid recovery rate can reach 99.0%, the product purity is up to 99.8%, no three wastes is produced, and concentrated acids produced in the treatment process are reusable.