The invention discloses a device for crystallizing and granulating
struvite by strengthening gas-liquid
fluidization. The device is provided with a reactor main body and a
settling zone, wherein the reactor main body comprises a
crystal generating zone and a fluidizing layer from bottom to top, wherein an
exposure opening is formed in the lower part of the
crystal generating zone, and a water inlet is formed in the upper part of the
exposure opening. The fluidizing layer is communicated with the
settling zone by a diversion
pipe; the bottom of the
settling zone is connected with the bottom of the
crystal generating zone through a refluxing
pipe; a horizontal separation board is arranged at the lower-middle part of the settling zone; an overflow weir is arranged at the right-upper part of the settling zone. The device disclosed by the invention has the advantages that firstly, the device can realize strengthening of the gas-liquid
fluidization and promote forming and growth of a
struvite crystal;
granulation of the
struvite crystal is finally realized, the settling property of the struvite crystal is improved, the concentration of suspended matters in
effluent is reduced, and clarification of the
effluent is ensured; secondly, the
mass transfer effect in the device can be enhanced by strengthening the circulation, the reaction efficiency is improved, the
nitrogen and
phosphorus removal effect of
wastewater is enhanced, and efficient
recovery of
nitrogen and phosphorous from the
wastewater is realized; thirdly, large-granular struvite can be conveniently recovered.