The invention discloses an enhanced dephosphorization reactor. The reactor body comprises, from bottom to top, a water distribution zone, a
reaction zone and a
precipitation zone in sequence, wherein the lower part of the water distribution zone is equipped with a returned
sludge hopper, a
mixing chamber is arranged at the upper part of the returned
sludge hopper and a jet water inflow device is arranged at the center of the returned
sludge hopper; the
reaction zone is equipped with, from inside to outside, a first
reaction zone, a second reaction zone and a third reaction zone in sequence, and a
chemical agent inflow
pipe is located at the lower part of the first reaction zone; and the
precipitation zone is equipped with, from bottom to top, a sludge
discharge port, a precipitated sludge hopper, a sludge
precipitation chamber, an overflow weir and a water outlet in sequence, and a saw-toothed overflow mouth is formed at the upper part of the overflow weir. The enhanced dephosphorization reactor combines thawing agglomeration dephosphorization,
flocculation dephosphorization and
crystallization dephosphorization, realizes the
complementation of all functional units, has the advantages of compact structure and small occupation area; in addition, jet water inflow is adopted to enhance the
mixing effect of
wastewater and
chemical agents, promote the
reflux of the precipitated sludge for
recovery and enhance dephosphorization effect; the
solid-liquid separation effect is improved by the
synergy of crystalline column layer
filtration and
inverted triangle sedimentation separation of the precipitation zone; and the precipitated sludge has
high phosphorus content.