Treatment device for producing water treatment agent organic phosphine product byproduct formaldehyde-containing waste acid

The utility model discloses a treatment device for producing water treatment agent organic phosphine product byproduct formaldehyde-containing waste acid, which comprises an FEMON oxidation pond, a settling pond, a photocatalytic reaction pond, a filler reaction tower and a neutralization regulating pond, the input end of the FEMON oxidation pond is connected with a formaldehyde-containing waste acid storage tank, two output ends of the FEMON oxidation pond are connected with the settling pond and the neutralization regulating pond, and the photocatalytic reaction pond is connected with the filler reaction tower. A formaldehyde remover solution and a stirring device are arranged in the FEMON oxidation pond; the output end of the sedimentation tank is connected with the photocatalytic reaction tank and the FEMON oxidation tank, a spraying device connected with the sedimentation tank, a plurality of photocatalyst reaction plates and a light source matched with the photocatalyst reaction plates are arranged in t