Novel catalytic cracking flue gas desulfurization wastewater treatment device

The invention discloses a novel catalytic cracking flue gas desulfurization wastewater treatment device, which is characterized by comprising a settler; the desulfurization wastewater is sent to the settler, wherein the settler sequentially comprises a clear water area, an inclined tube settling area and a concentration area from top to bottom; the wastewater enters the settler and then upwards enters the inclined tube settling area to complete mud-liquid separation, wherein the separated supernate enters a clear water area, and sludge sinks to a concentration area; the sludge concentration buffer tank is arranged below the settler, is communicated with the concentration area and is used for further settling sludge in the concentration area after the sludge is discharged into the concentration area; the dehydrator is arranged below the sludge concentration buffer tank and is used for dehydrating the sludge discharged from the sludge concentration buffer tank to form a sludge cake; and the oxidation tank is ar