Treatment device for hydrofluoric acid-containing wastewater

The utility model relates to the technical field of wastewater treatment devices, in particular to a hydrofluoric acid-containing wastewater treatment device which comprises a water inlet tank, a reaction tank unit, a flocculation tank and a precipitation tank which are sequentially connected, the reaction tank unit comprises at least two reaction tanks which are connected in parallel, and a water outlet of the water inlet tank is respectively connected with each stage of reaction tank; a communicating pipeline is connected to a sludge outlet of the precipitation tank, a first branch pipeline and a second branch pipeline are arranged on the communicating pipeline, the first branch pipeline is used for discharging sludge in the precipitation tank, and the second branch pipeline is used for enabling the sludge to flow back to the first-stage reaction tank. According to the device, the multi-stage reaction tanks are arranged, the adding mode of alkali liquor and calcium salt is improved, and the removal effect o