Ardealite harmless treatment device

The utility model provides a phosphogypsum innocent treatment device which comprises a first mixing pool, a second mixing pool, a third mixing pool and a fourth mixing pool, the hydraulic cyclone separator is connected to the first mixing tank and is used for carrying out cyclone separation treatment on the slurry to obtain granular feed liquid with smaller particle size and granular feed liquid with larger particle size; the second mixing tank is connected to a solid phase outlet of the hydraulic cyclone separator and is used for adding water to dilute the granular feed liquid with larger particle size; the plate-and-frame filter press is connected to the second mixing tank and is used for carrying out solid-liquid separation on the diluted slurry; the precipitation reaction tank is connected to the filtrate side of the plate-and-frame filter press and is used for carrying out precipitation reaction on calcium, magnesium and fluorine ions in the filtrate; the ceramic membrane is connected to the precipitatio