The invention discloses a dosing
system, which is characterized by including a dosing pump, a dosing tank, a dosing device and an
aeration tank, the dosing device comprises an
inverted U type
siphon, a floating ball and a bracket, wherein the bracket comprises a longitudinal rod and at least one lateral plate, the longitudinal rod is vertically fixed on the dosing tank, the middle part of each lateral plate is fixedly arranged on the longitudinal rod, two ends of each lateral plate are provided with sliding chutes, two longitudinal pipes of the
inverted U type
siphon respectively downward penetrate into the sliding chutes, the floating ball is fixed on the end of a short longitudinal
pipe of the
inverted U type
siphon, the floating ball is located in the dosing tank, and a long longitudinal
pipe of the inverted U type siphon is located just above the
aeration tank. The dosing
system can maintain a certain flow velocity, can uninterruptedly
dose to the
aeration tank, and can be regularly swashed, polymeric
ferric sulfate is not easy to crystallize in the
pipe, blockage is not easy to cause, and the dosing efficiency is improved.