Struvite crystallization and coagulation coupling fluidized reactor

The utility model relates to a struvite crystallization and coagulation coupling fluidized reactor which comprises a vertically arranged reaction tank body, a circulating fluidization area is arranged in the middle of the inner side of the reaction tank body, and a settling area is arranged at the bottom of the inner side of the reaction tank body. A mud-water separation area is arranged at the top of the inner side of the reaction tank body, a coagulation agent adding pipe is introduced into the mud-water separation area, a circulating pipe which is communicated with the circulating fluidization area to enable liquid in the circulating fluidization area to circularly flow is arranged on the outer side of the reaction tank body, and a water inlet and a water outlet are formed in the two ends of the circulating pipe respectively; a water inlet is formed in the circulating pipe, a compressed air inlet is formed in the circulating pipe close to the water inlet, a raw water inlet and a medicament inlet are furthe